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1. WO2010074527 - FOAM EJECTOR FOR A SHIP

Document

Description

Title of Invention

Technical Field

1  

Background Art

2   3   4   5   6   7   8   9   10   11   12   13   14   15   16   17  

Disclosure of Invention

Technical Problem

18   19   20  

Solution to Problem

21   22   23  

Advantageous Effects of Invention

24   25  

Brief Description of Drawings

26   27   28   29   30   31   32   33   34  

Best Mode for Carrying out the Invention

35   36   37   38   39   40   41   42   43   44   45   46   47   48   49   50   51   52   53   54   55   56   57   58   59   60   61   62   63   64   65   66   67   68  

Industrial Applicability

69  

Claims

1   2   3   4   5  

Drawings

1   2   3   4   5   6   7   8  

Description

Title of Invention : FOAM EJECTOR FOR A SHIP

Technical Field

[1]
The present invention relates generally to a foam ejector for a ship, which is capable of generating and discharging fire extinguishing foam to a deck of the ship where a fire takes place, which constitutes a fixing basement to be installed at the deck of the ship and to be fluid-communicated with a foam storage tank, a fitting capable of performing left and right rotations around the fixing basement, an ejecting tube capable of performing up and down angular motions, and a rotational joint which is formed as a pipe connecting part of the type wherein a plug-like portion is inserted into a socket-like portion, whereby the rotational joint can very firmly support an exhaust pressure of the fire extinguishing foam, and it is possible to highly reduce the total overall weight of the foam ejector and thereby resulting in a considerable reduction in time and costs to be spent for the transportation and the installation of the foam ejector, and wherein a steering lever becomes easy and reasonable to be installed at the rotational joint and it easy to operate the foam ejector.

Background Art

[2]
Generally, the carrying of matches, metal tools or other flammable materials is prohibited within all kinds of ship for transporting inflammable, combustibles materials by law. In detail, the crew and the passenger must not put on any metal-heeled shoe. Except for a designated smoking area, a smoker must not smoke in areas those inflammable, combustibles materials are loaded and unloaded such as a deck of the ship or in the vicinity thereof or a ventilating opening extending there from. Also, the law prohibits the use of all firearms within such areas.
[3]
Although such great caution and restrictions have provided in the hope of preventing fires, a large-scale fire may be caused by carelessness and thereby resulting in the occurrence of serious damage to men and the ship. Accordingly, it is necessary to install fire extinguishing/suppression systems in protected areas that the probability of fire occurrence is high. One case that has widely known to the general public is a deck foam fire extinguishing system, which is capable of generating and discharging fire extinguishing foam to a deck of the ship where a fire takes place.
[4]
This deck foam fire extinguishing system include a foam storage tank for storing a fire extinguishing foam, which is provided in the body of the ship, a foam ejector for ejecting a fire extinguishing foam, which is installed on a deck of the ship, and piping lines extending between the foam storage tank and the foam ejector. The foam ejector may be used to extinguish a fire when the fire takes place at the outside of the body of the ship except for the deck.
[5]
In the meantime, the fire extinguishing foam is commonly used to extinguish the B-grade fire that may take place within the ship by the combustion of some combustibles materials such as crude petroleum or oil. In use, it is mixed with fresh water or seawater and then bubble-type foam may be generated by further processing the mixed solution. This bubble-type foam is typically stored in the foam storage tank install in the body of the ship in normal time, but when fire started, it may be ejected toward the deck of the ship right after opening a valve of the foam storage tank.
[6]
FIGS. 1 and 2 show an ejector for generating and discharging fire extinguishing foam for a ship according to a prior art. Referring to FIGS. 1 and 2, the conventional ejector 1 comprises a bottom plate 8, which has a flange shape and it is installed on a deck of the ship, a fitting 2 for receiving and interconnecting an upper end of the bottom plate 8 and a rotational joint 7, which extends in the vertical direction, an ejecting tube 3 for receiving and interconnecting an upper end of the fitting 2 and the rotational joint 7, which extends toward a protected area that the probability of fire occurrence is high, and an ejecting nozzle 4 mounted to a front end of the ejecting tube 3. The fitting 2 and the ejecting tube 3 form a substantially "S" shape on the whole. A nozzle handle 4a is installed at the ejecting nozzle 4.
[7]
In the meantime, a steering lever 5 for controlling an ejecting path of the fire extinguishing foam is installed at the rotational joint 7 in such a manner that one end thereof(the left side in FIG. 2) is hingedly connected with the fitting 2 and the other end thereof(the right side in FIG. 2) is connected with the ejecting tube 3. The steering lever 5 may be formed as a substantially "U"-shaped pipe or rod. The steering lever 5 may support double rotations of the fitting 2 around the bottom plate 8, which are combinations of left and right rotations, and it may support double angular motions of the ejecting tube 3 around the fitting 2, which are combinations of up and down angular motions.
[8]
A lever supporting member 5a is installed at the fitting 2 in a manner that it extends at a predetermined distance in the vertical direction. A coiled spring 6 is disposed between a low end of the lever supporting member 5a and the steering lever 5. This coiled spring 6 has function to prevent the ejecting tube 3 from going down around the rotational joint 7 in which the fitting 2 is connected with the ejecting tube 3, due to the weight itself.
[9]
The rotational joint 7 is installed at a juncture between the fitting 2 and the ejecting tube 3, respectively. The rotational joint 7 allows the steering lever 5 to support left and right rotations of the fitting 12 around the bottom plate 8 and to support up and down angular motions of the ejecting tube 3 around the fitting 2. As best seen in FIG. 2, the rotational joint 7 is connected with the fitting 2 and the ejecting tube 3 through a pipe connection of the type the flanges 2a,3a and a ball bearing 9 are interposed between the fitting 2 and the ejecting tube 3.
[10]
In detail, the flanges 2a,3a are fitted and installed at connecting ends of the fitting 2 and the ejecting tube 3. The ball bearing 9 is inserted between the flanges 2a,3a. The flange 2a adjacent to the fitting 2 is fitted around an outer ring 9a on one side of a ball 9c by means of a bolt 9e, and the flange 3a adjacent to the ejecting tube 3 is fitted around an inner ring 9b on one side of the ball 9c by means of a bolt 9e. The ball 9c for supporting the rotation of the ball 9 and a sealing ring 9d for prevent the fire extinguishing foam from being leaked are installed between the outer ring 9a and the inner ring 9b. This connecting structure as described above may be also applied to the juncture among the bottom plate 8, the fitting 2 and the rotational joint 7.
[11]
However, one drawback of such known ejector 1 is that it has an over capacity by comparison to its satisfactory fire extinguishing performance during fire fighting applications and thereby resulting in increase of the weight of the ejector.
[12]
Another drawback of the conventional ejector 1 is that only one row of ball bearings 9 for supporting the weight and the operation of the ejector 1 is provided in the rotational joint 7 between the bottom plate 8 and the fitting 2 and is provided in the rotational joint 7 between the fitting 2 and the ejecting tube 3, respectively. Since the rotational joint 7 is supported by using only one row of the ball bearings 9, the contact and supporting area of the rotational joint 7 has substantially reduced. Accordingly, the conventional ejector 1 has not been used satisfactorily.
[13]
Another drawback of the conventional ejector 1 is that the fitting 2 and the ejecting tube 3 form a substantially "S" shape on the whole so that the rotational joint 7 of the ejector 1 may be easily worn and broken due to the unstable rolling and the pitching phenomena during the ships voyage.
[14]
If such problems have been occurred during the ships voyage, the rotational joint 7 cannot support satisfactorily the high exhaust pressure of the fire extinguishing foam during the course of ejecting the fire extinguishing foam from the ejector 1 after opening a valve at a state of emergency such as fire accident in the ship. This causes the ejector 1 to malfunction or to produce incorrect results.
[15]
In worst case, this causes the ejector 1 to be broken at the rotational joint 7 or some other part in the vicinity thereof. Accordingly, it is impossible to quickly extinguish a developing fire before extensive damage occurs. Consequently, it cannot effectively prevent the occurrence of lives lost and property damage in fire.
[16]
Since the weighty metal flanges 2a,3a are applied to the juncture among the bottom plate 8, the fitting 2 and the ejecting tube 3, the total overall weight of the foam ejector 10 becomes heavier. Accordingly, a long time and a substantial cost occur to perform the process for mounting the ejector 1 on the deck of the ship after assembling and transporting it and thereby it has poor productivity. Furthermore, it would have detrimental effect on easy operation of the ejector 1 by using the steering lever 5.
[17]
In the meantime, the steering lever 5 is installed at the rotational joint 7 in such a manner that one end thereof is hingedly connected with the fitting 2 and the other end thereof is connected with the ejecting tube 3 as described above. Due to the structure of the rotational joint 7 of which the ball bearing 9 is between the flanges 2a,3a, the steering lever 5 cannot be directly installed on a horizontal rotational shaft projecting from the fitting 2 and the ejecting tube.

Disclosure of Invention

Technical Problem

[18]
In consideration of the above-mentioned disadvantages or inconveniences of the conventional techniques, a first object of the present invention is to provide a foam ejector for a ship, which is capable of providing a rotational joint with a relatively wide contacting and supporting area so that the rotational joint can very firmly support an exhaust pressure of the fire extinguishing foam, and which is capable of ensuring a reliable and safe operation of the foam ejector, which constitutes a fixing basement to be installed at the deck of the ship, a fitting capable of performing left and right rotations around the fixing basement, an ejecting tube capable of performing up and down angular motions, and a rotational joint which is formed as a pipe connection of the type wherein a plug-like portion is inserted into a socket-like portion and two rows of pluralities of ball bearings for supporting rotations of the fitting and the ejecting tube are disposed within the rotational joint.
[19]
Furthermore, a second object of the present invention is to provide a foam ejector for a ship, which is capable of accomplishing a considerable reduction in time and costs to be spent for the transportation and the installation of the foam ejector when compared with the conventional foam ejector, which is capable of allowing the foam ejector to be easily and effectively operated by using the steering lever, and which is capable of improving efficiency and convenience to users in installation of the steering lever, by providing a pipe connecting structure due to the structure improvement of the rotational joint, wherein it is no longer necessary to have any flange within the rotational joint, and by directly installing the steering lever on a horizontal rotational shaft projecting from the fitting and the ejecting tube.
[20]
In addition, a third object of the present invention is to provide a foam ejector for a ship, which is capable of properly controlling the quantity, the distance and the range of ejecting the fire extinguishing foam from the ejecting nozzle by operating the nozzle head as needed, and which is capable of providing a variety level of fire extinguishing capability by using only one foam ejector so that it is possible to accomplish highest improvement of the functionality and the product value of the foam ejector, by installing the nozzle head in the ejecting cap of the ejecting nozzle in such manner that the nozzle head can move within the ejecting cap.

Solution to Problem

[21]
In order to achieve the objects, the present invention provides a foam ejector for a ship, which is capable of generating and discharging fire extinguishing foam to a deck of the ship where a fire takes place, in which it constitutes a fixing basement to be installed at the deck of the ship, a fitting for receiving and interconnecting an upper end of the fixing basement and a rotational joint, an ejecting tube for receiving and interconnecting an upper end of the fitting and the rotational joint, an ejecting nozzle mounted to a front end of the ejecting tube, and a steering lever for controlling an ejecting path of the fire extinguishing foam by making the fitting and the ejecting tube rotate at a desired rotational direction as needed, characterized in that;
[22]
the rotational joint is formed as a pipe connection of the type wherein a first plug portion formed at an upper end of the fixing basement is inserted into a first socket portion formed at a lower end of the fitting, and a second plug portion formed at an upper end of the fitting is inserted into a second socket portion formed at a rear end of the ejecting tube, and wherein two rows of pluralities of ball bearings for supporting rotations of the fitting and the ejecting tube are disposed between the first plug portion and the first socket portion and between the second plug portion and the second socket portion.
[23]
According to the present invention, a sealing ring for prevent the fire extinguishing foam from being leaked is disposed between the first plug portion and the first socket portion and between the second plug portion and the second socket portion, respectively. The steering lever is integrally engaged with the ejecting tube at the outer surface of the second socket portion. The ejecting nozzle comprises a nozzle cap installed at the front end of the ejecting tube, an ejecting cap installed at a front end of the nozzle cap, a nut cap, which is provided at the center of the interior of the nozzle cap and is supported by a plurality of supporting ribs radially extending within the nozzle cap, a rod-type bolt movably and threadably coupled into the nut cap, and a nozzle head fixed and installed at a front end of the rod-type bolt.

Advantageous Effects of Invention

[24]
As described above, according to the present invention, some protrusions such as the conventional flanges may be not provided any longer on the whole surface of the foam ejector, by improving the individual rotational joint as pipe connecting structures between the plug portions and the socket portions. Accordingly, it can provide an attractive appearance for the foam ejector and thereby resulting in high-value commodities of the ejector.
[25]
More particularly, since the plug portions and the socket portions of the rotational joint are contacted with each other over a wide contacting area and two rows of the ball bearings are provided there between, the rotational joint can firmly support a load or a shock to be applied to the foam ejector installed at the deck of the ship due to the unstable rolling and the pitching phenomena during the ships voyage. Accordingly, it is possible to prevent the foam ejector from being damaged during the ships voyage. Furthermore, the rotational joint can firmly support an exhaust pressure of the fire extinguishing foam to be exhausted through the fitting and the ejecting tube from the fixing basement.In addition, the foam ejector can smoothly operate with the aid of the rotational joint. Accordingly, the safe and reliable operation of the foam ejector can rest assured when fighting a fire in the ship so that it is possible to respond to the fire. Consequently, it can effectively prevent the occurrence of loves lost and property damage in fire.

Brief Description of Drawings

[26]
The above object and other characteristics and advantages of the present invention will become more apparent by describing in detail a preferred embodiment thereof with reference to the attached drawings, in which:
[27]
FIG. 1 is a side view of an ejector for generating and discharging fire extinguishing foam for a ship according to a prior art;
[28]
FIG. 2 shows an important part in a rear side of the ejector as shown in FIG. 1, illustrating partly in cross section for clarity;
[29]
FIG. 3 is a side view of an ejector for generating and discharging fire extinguishing foam for a ship according to the present invention;
[30]
FIG. 4 is a rear view in partial cross-section of the ejector of FIG. 3, which is centered on a fitting;
[31]
FIG. 5 is a plan view in partial cross-section of the ejector of FIG. 3, which is centered on an ejecting tube;
[32]
FIG. 6 is a front view of an ejecting nozzle employed in the ejector according to the present invention;
[33]
FIG. 7 is a sectional view of the ejector according to the present invention, showing the invention as a development figure for clarity; and
[34]
FIG. 8 is a partial extended view in partial cross-section of the ejector, for showing a state that pluralities of ball bearings are installed in a rotational joint.

Best Mode for Carrying out the Invention

[35]
Hereinafter, the constitution and the operation of an ejector for generating and discharging fire extinguishing foam for a ship according to a preferred embodiment of the present invention will be explained in more detail with reference to the accompanying drawings FIGS. 3 to 8.
[36]
Prior to proceeding to the more detailed description of the preferred embodiment according to the present invention, it should be noted that, for the sake of clarity and understanding of the invention identical components which have identical functions have been identified with identical reference numerals throughout the different views which are illustrated in each of the attached drawing Figures.
[37]
Referring to FIG. 3, the ejector for generating and discharging fire extinguishing foam for a ship according to the preferred embodiment of the present invention comprises a fixing basement 11, which is installed at a deck of the ship and is fluid-communicated with a foam storage tank(not shown) provided in the body of a ship, a fitting 12 for receiving and interconnecting an upper end of the fixing basement 11 and a rotational joint 17, an ejecting tube 13 for receiving and interconnecting an upper end of the fitting 12 and the rotational joint 17, and an ejecting nozzle 14 mounted to a front end of the ejecting tube 13.
[38]
As best seen in FIG. 7, the fixing basement 11, the fitting 12 and the ejecting tube 13 are connected together and thereby they form a foam flowing passageway 19 for ejecting fire extinguishing foam, which is formed as a zigzag flowing course. Unlike the conventional bottom plate 8 as shown in FIGS. 1 and 2, the fixing basement 11 according to the present invention comprises a pipe-type body that is fluid-communicated with the fitting 12. Pluralities of fixing holes 11a for fixing the fixing basement 11 on the deck of the ship are formed through an annular-shaped flange portion of the fixing basement 11.
[39]
In the rotational joint 17 constructing a first important part of the present invention, a first plug portion 11b formed at an upper end of the fixing basement 11 is inserted into a first socket portion 12a formed at a lower end of the fitting 12. Likewise, a second plug portion 12b formed at an upper end of the fitting 12 is inserted into a second socket portion 13a formed at a rear end of the ejecting tube 13. Due to thus plug-socket type coupling scheme, the rotational joint 17 may create a preferred pipe connecting part.
[40]
In other words, the upper ends of the fixing basement 11 and the fitting 12 can function as a plug, respectively and the lower end of the fitting 12 and the rear end of the ejecting tube 13 can function as a socket, respectively. On the basis of these functions, the fixing basement 11, the fitting 12 and the ejecting tube 13 may form a fitting and inserting coupling structure in the pipe.
[41]
In the rotational joint 17, pluralities of ball bearings 16 are disposed between the first plug portion 11b and the first socket portion 12a and between the second plug portion 12b and the second socket portion 13a, respectively. The ball bearings 16 may support double rotations of the fitting 12, which are combinations of left and right rotations around the fixing basement 11 and may support double angular motions of the ejecting tube 13 around the fitting 12, which are combinations of up and down angular motions. Furthermore, a sealing ring 18 for prevent the fire extinguishing foam from being leaked is disposed between the first plug portion 11b and the first socket portion 12a and between the second plug portion 12b and the second socket portion 13a, respectively.
[42]
As best seen in FIG. 7 and 8, pluralities of ball bearings 16 are inserted into spherical grooves 16c, which are formed between the first plug portion 11b and the first socket portion 12a and between the second plug portion 12b and the second socket portion 13a. The half of the spherical groove 16c is formed in the first socket portion 12a or the second socket portion 13a. Other half of the spherical groove 16c is formed in the first plug portion 11b or the second plug portion 12b.
[43]
The rotation of the socket portions 12a,13a may smoothly supported by the operation of the ball bearings 16. That is, the double rotations of the fitting 12 around the fixing basement 11, which are combinations of left and right rotations of the fitting 12, are supported by means of the ball bearings 16. Furthermore, the double angular motions of the ejecting tube 13 around the fitting 12, which are combinations of up and down angular motions of the ejecting tube 13, are supported by means of the ball bearings 16.
[44]
In the meantime, a guide plug 16a is inserted through the first socket portion 12a or the second socket portion 13a into the spherical groove 16c respectively, which is formed between the first plug portion 11b and the first socket portion 12a and between the second plug portion 12b and the second socket portion 13a. The ball bearing 16 may be inserted into the spherical groove 16c or may be removed from the spherical groove 16c due to the operation of the guide plug 16a.
[45]
Since a front end of the guide plug 16a has a spherical shape, it can support the operation of the rotational joint 17 together with the ball bearings 16. While the rotational joint 17 may be fabricated by inserting the ball bearings 16 into the spherical grooves 16c provided between the socket portions 12a,13a and the plug portions 11b,12b with the aid of the guide plug 16a in the preferred embodiment according to the present invention, it should be appreciate by one of ordinary skill that any type of suitable installation technique may be used for installing the ball bearings 16.
[46]
Now referring to FIG. 8, a grease nipple 16b for supplying the ball bearings 16 with grease as lubricating oil is mounted to a rear side of the guide plug 16a. A through hole for ejecting grease is formed through a center portion of the grease nipple 16b and the guide plug 16a. By improving the individual rotational joint 17 as a pipe connecting structure between the plug portions 11b,12b and the socket portions 12a,13a, some protrusions such as the conventional flanges 2a,3a may be not provided any longer on the whole surface of the foam ejector 10. Accordingly, it can provide an attractive appearance for the foam ejector 10 and thereby resulting in high-value commodities of the ejector 10.
[47]
Since the plug portions 11b,12b and the socket portions 12a,13a of the rotational joint 17 are contacted with each other over a wide contacting area and two rows of the ball bearings 16 are provided there between, the rotational joint 17 can firmly support a load or a shock to be applied to the foam ejector 10 installed at the deck of the ship due to the unstable rolling and the pitching phenomena during the ships voyage. Accordingly, it is possible to prevent the foam ejector 10 from being damaged during the ships voyage.
[48]
Furthermore, the rotational joint 17 can firmly support an exhaust pressure of the fire extinguishing foam to be exhausted through the fitting 12 and the ejecting tube 13 from the fixing basement 11. In addition, the foam ejector 10 can smoothly operate with the aid of the rotational joint 17. Accordingly, the safe and reliable operation of the foam ejector 10 can rest assured when fighting a fire in the ship so that it is possible to respond to the fire.
[49]
Unlike the conventional rotational joint 7, there is no any weighty metal flange at the juncture among the fixing basement, the fitting 12 and the ejecting tube 13 in the preferred embodiment according to the present invention. Accordingly, it is possible to highly reduce the total overall weight of the foam ejector 10 and thereby resulting in a considerable reduction in time and costs to be spent for the transportation and the installation of the foam ejector 10 when compared with the conventional foam ejector 1. In addition, the operation of the foam ejector 10 by using the steering lever 15 may be performed more easily.
[50]
As described above, the sealing ring 18 has function to prevent the fire extinguishing foam from being leaked through the rotational joint 17. Additionally, since the plug portions 11b,12b are contacted with the socket pockets 12a,13a over a relatively wide area and two rows of ball bearings 16 are disposed there between in the foam ejector 10, it can give rise to structurally sufficient blocking effects against a leakage of fire extinguishing foam.
[51]
Although it can block leakage of the fire extinguishing foam without employing the sealing ring 18 as needed, it is preferable to have the sealing ring 18 so as to obtain the more perfect blocking effect of the fire extinguishing foam. Although the sealing ring 18 is installed at the front end of the plug portions 11b,12b as shown in the attached drawings, it will readily be understood that it can be installed at other positions such as a position between the ball bearings 16.
[52]
In the meantime, FIGS. 5 and 6 show a second important par of the present invention. Referring to FIGS. 5 and 6, a lever jointing portion 15a is integrally engaged with the ejecting tube 13 at the outer surface of the second socket portion 13a, more particularly at the center portion of the rotational joint 17. A front end of the steering lever 15 having a rod shape is detachably engaged with the lever jointing portion 15a and a knob or a handle may be mounted to a rear end of the steering lever 15.
[53]
As described above, it is possible to simply install the steering lever 15 at the most reasonable position by simply connecting the steering lever 15 having a rod shape to the outer surface of the second socket portion 13a. Since the ball bearing 16 is disposed between the second socket portion 13a and the second plug portion 12b inserted therein, the steering lever 15 can be directly installed at the center portion of the rotational joint 17.
[54]
By simply install the steering lever 15 at the most reasonable position as described above, the workability of the foam ejector 10 may be enhanced and it has good productivity. Also, it can easily perform the operation of the foam ejector 10 by using the steering lever 15. In other words, it is possible to perform double rotations of the fitting 12, which are combinations of left and right rotations, and double angular motions of the ejecting tube 13, which are combinations of up and down angular motions.
[55]
Alternatively, likewise the conventional connecting structure applied to the conventional foam ejector 1, it is to be understood that the conventional steering lever 5 having a U-shaped frame structure may be employed between the fitting 12 and the ejecting tube 13. Also, it is to be understood that the appearance of the steering lever 5 is not limited in its application to the details of construction and to the arrangements of the components set forth in the following description or illustrated in the drawings.
[56]
It should be appreciated by one of ordinary skill, that the first plug portion 11b can function as a socket and the first socket portion 12a can function as a plug as needed. Also, it is to be understood that the second plug portion 12b can function as a socket and the second socket portion 12a can function as a plug as needed. It is preferred that the foam flowing passageway 19 is formed as a smooth passageway because there is no any stair within the foam flowing passageway 19 due to the formation of the plug-socket type connecting structure.
[57]
In the meantime, the ejecting nozzle 14 installed to the front end of the ejecting tube 13 is a third important part of the present invention. The ejecting nozzle 14 comprises a nozzle cap 20 installed at the front end of the ejecting tube 13 by means of a bolt 20a and an ejecting cap 24 is engaged threadably to an outer periphery surface of the front end of the nozzle cap 20. A nozzle handle 14a is mounted to an outer periphery surface of a rear end of the ejecting cap 24.
[58]
Although the nozzle cap 20 and the ejecting cap 24 are respectively shown as a separate body in the attached drawings, it is foreseen that they can be formed as a single integrated body other than the disclosed structure. Also, it is to be understood that the nozzle cap 20 and the ejecting cap 24 can be engaged with each other by certain means other than the disclosed thread engagement.
[59]
The front end of the nozzle cap 20 is formed as a slanted surface that is tapered in a radial outward direction so as to obtain a sufficient width for ejecting the fire extinguishing foam. A plurality of supporting ribs 25 (typically three to eight ribs) extend within the nozzle cap 20. A nut cap 23 provided at the center of the interior of the nozzle cap 20 is supported by the supporting ribs 25 which are centered thereto. A rod-type bolt 22 is movably, threadably coupled into the nut cap 23. A nozzle head 21 is fixed and installed at a front end of the rod-type bolt 22.
[60]
As shown in FIGS. 5 to 7, the nozzle head 21 has a substantially dish shape. At this time, the shape of the nozzle head 21 is corresponding to the slanted surface of the front end of the nozzle cap 20 so that the nozzle head 21 may be snugly inserted into the front end of the nozzle cap 20. An ejecting passageway 26 for ejecting the fire extinguishing foam having a conical shape is formed between the nozzle head 21 and the nozzle cap 20. The size of the ejecting passageway 26 becomes an important factor for determining the quantity, the distance and the range of ejecting the fire extinguishing foam. In the present invention, the size of the ejecting passageway 26 can be optionally controlled by a user.
[61]
In detail, if a user grasps the nozzle head 21 by hand and continuously rotates it at a predetermined rotational direction, the rod-type bolt 22 may move within the nut cap 23 together with the nozzle head 21 in the forward and backward direction. Accordingly, it is foreseen that the position of the nozzle head 21 within the ejecting cap 24 can be easily controlled as needed. Due to this, it is to be understood that the size of the ejecting passageway 26 provided between the nozzle head 21 and the nozzle cap 20 may be optionally controlled as needed.
[62]
Since the quantity, the distance and the range of ejecting the fire extinguishing foam can be controlled by the user as needed, it is possible to provide a variety level of fire extinguishing capability by using only one foam ejector 10 according to the present invention thereby resulting in highest improvement of the functionality and the product value of the foam ejector 10.
[63]
Since the present invention does not employ the conventional coiled spring 6 and employs a corrosion resistant material having a light weight as a material for the body of the foam ejector 10 so as to harmonize the weight of the ejecting tube 13 including the ejecting nozzle 14 with the weight of the steering lever 15, it is possible to prevent the ejecting tube 13 from going down due to the weight itself.
[64]
For example, the foam ejector 1 according to the present invention employs a bronze having a material code name of BC6, which has a light weight and an excellent corrosion resistance against sea water, when compared with the conventional foam ejector 1 of which a nodular cast iron having a material code name of GCD 450 is used. Accordingly, the present invention can provide the user with a usable condition with considering the reducing weight, the life cycle and the service requirement of the foam ejector. Consequently, the apparatus of the present invention has significant advantages over previously known apparatus.
[65]
It is to be understood that the invention is not limited in its application to the details of construction and to the arrangements of the components set forth in the above description or illustrated in the drawings.
[66]
The invention is capable of other embodiments and of being practiced and carried out in various ways by modifying the structure of piping in accordance with a kind of the ship. Also, it is to be understood that the phraseology and terminology employed herein are for the purpose of description and should not be regarded as limiting.
[67]
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof.
[68]
Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims.

Industrial Applicability

[69]
The present invention relates to a foam ejector for a ship, which is capable of generating and discharging fire extinguishing foam to a deck of the ship where a fire takes place. So this present invention has a industrial applicability.

Claims

[Claim 1]
A foam ejector 10 for a ship, which is capable of generating and discharging fire extinguishing foam to a deck of the ship where a fire takes place, in which it constitutes a fixing basement 11 to be installed at the deck of the ship, a fitting 12 for receiving and interconnecting an upper end of the fixing basement 11 and a rotational joint 17, an ejecting tube 13 for receiving and interconnecting an upper end of the fitting 12 and the rotational joint 17, an ejecting nozzle 14 mounted to a front end of the ejecting tube 13, and a steering lever 15 for controlling an ejecting path of the fire extinguishing foam by making the fitting 12 and the ejecting tube 13 rotate at a desired rotational direction as needed, characterized in that; the rotational joint 17 is formed as a pipe connection of the type wherein a first plug portion 11b formed at an upper end of the fixing basement 11 is inserted into a first socket portion 12a formed at a lower end of the fitting 12, and a second plug portion 12b formed at an upper end of the fitting 12 is inserted into a second socket portion 13a formed at a rear end of the ejecting tube 13, and wherein two rows of pluralities of ball bearings 16 for supporting rotations of the fitting 12 and the ejecting tube 13 are disposed between the first plug portion 11b and the first socket portion 12a and between the second plug portion 12b and the second socket portion 13a.
[Claim 2]
The foam ejector for a ship as claimed in claim 1, wherein a sealing ring 18 for preventing the fire extinguishing foam from being leaked is disposed between the first plug portion 11b and the first socket portion 12a and between the second plug portion 12b and the second socket portion 13a, respectively.
[Claim 3]
The foam ejector for a ship as claimed in claims 1 or 2, wherein the steering lever 15 is integrally fixed and engaged with the ejecting tube 13 at the outer surface of the second socket portion 13a.
[Claim 4]
The foam ejector for a ship as claimed in claims 1 or 2, wherein the ejecting nozzle 14 comprises a nozzle cap 20 installed at the front end of the ejecting tube 13, an ejecting cap 24 installed at a front end of the nozzle cap 20, a nut cap 23, which is provided at the center of the interior of the nozzle cap 20 and is supported by a plurality of supporting ribs 25 radially extending within the nozzle cap 20, a rod-type bolt 22 movably and threadably coupled into the nut cap 23, and a nozzle head 21 fixed and installed at a front end of the rod-type bolt 22.
[Claim 5]
The foam ejector for a ship as claimed in claim 3, wherein the ejecting nozzle 14 comprises a nozzle cap 20 installed at the front end of the ejecting tube 13, an ejecting cap 24 installed at a front end of the nozzle cap 20, a nut cap 23, which is provided at the center of the interior of the nozzle cap 20 and is supported by a plurality of supporting ribs 25 radially extending within the nozzle cap 20, a rod-type bolt 22 movably and threadably coupled into the nut cap 23, and a nozzle head 21 fixed and installed at a front end of the rod-type bolt 22.

Drawings

[ Fig. 1]

[ Fig. 2]

[ Fig. 3]

[ Fig. 4]

[ Fig. 5]

[ Fig. 6]

[ Fig. 7]

[ Fig. 8]