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1. (WO2013143106) A GUARD FOR CONTROLLING MATERIAL DISPERSION IN A DRILLING PUMP

Pub. No.:    WO/2013/143106    International Application No.:    PCT/CN2012/073276
Publication Date: Fri Oct 04 01:59:59 CEST 2013 International Filing Date: Sat Mar 31 01:59:59 CEST 2012
IPC: F04B 53/18
Applicants: SICHUAN HONGHUA PETROLEUM EQUIPMENT CO., LTD.
HUANG, Shunjun
Inventors: HUANG, Shunjun
Title: A GUARD FOR CONTROLLING MATERIAL DISPERSION IN A DRILLING PUMP
Abstract:
A guard shroud for use in a pump is provided. The guard shroud comprises a plurality of shroud ring portions (4, 8) comprising channel sections with edge portions, which when arranged in a ring and connected along adjacent edge portions define a shroud ring; and an end plate that substantially closes one end of the shroud ring and is provided with an opening, wherein when the shroud ring is positioned around an outer surface of an open end of a cylinder liner (5), the end plate substantially closes the open end of the cylinder liner with the opening substantially coaxial with the cylinder liner so as to provide access for a piston rod (1). The guard shroud prevents external impurities from entering the lubricant oil.