CN103216438A

CN103216438A - Novel plunger pump crosshead box body

Info

Publication number: CN103216438A
Application number: CN2013100422920A
Authority: CN
Inventors: 李蓉; 李德清; 吕小飞; 黄冠
Original assignee: SJ Petroleum Machinery Co
Current assignee: Sinopec Oilfield Equipment Corp; Sinopec Siji Petroleum Machinery Co Ltd
Priority date: 2013-02-04
Filing date: 2013-02-04
Publication date: 2013-07-24
Anticipated expiration: 2033-02-04
Also published as: CN103216438B

Abstract

The invention relates to a novel plunger pump crosshead box body. The front end surface and the rear end surface of the box body are respectively designed into equational three big through holes, eight through holes and eight small through holes, wherein an annular seal groove is arranged out of the three big through holes; the upper part and the lower part of each big through hole are respectively provided with an oil drainage hole; and the upper end surface and the bottom surface of the box body are respectively provided with a plurality of equational screw holes. The novel plunger pump crosshead box body disclosed by the invention is in a casting structure, the scrapping risk due to welding defects can be avoided, the novel plunger pump crosshead box body can be turned over to be used, a draw bar can be used for connecting a pump head body, the crosshead box body and a crank box body into a whole, the self-lubricating performance and the abrasive resistance of the seat crosshead slideway of the three big through holes are better than those of a copper alloy sliding sleeve, and the sleeve separation defect is avoided. The novel plunger pump crosshead box body has the advantages of long service life and convenience in processing, assembling and maintaining.

Description

A kind of novel plunger pump crosshead casing

Technical field

The present invention relates to casing.

Background technique

In recent years, because the increase day by day of super deep layer or ultra-large fracturing work amount is more and more urgent to the demand that the large-scale complete pressure break that adapts is with it equipped.The pressure break pump truck is the nucleus equipment of pressure break unit, and plunger pump is as the critical component of pressure break pump truck, and the overall operation ability that its performance and technical merit are equipped down to large-scale complete pressure break the pressure break pump truck has decisive influence.Plunger pump crosshead casing is the important component part of plunger pump power end, the one end links to each other with crankcase body, the other end connects the fluid end pump head body by pull bar, its mainly act on be the inner chamber cylindrical hole as the reciprocating slideway of crosshead, realize rotatablely moving of bent axle is converted into crosshead and plunger to-and-fro motion stably.Plunger pump crosshead casing mostly adopts the steel welding pump shell structure that is integrated in one with crankcase body both at home and abroad at present, the welding of steel cylinder sleeve is arranged in the space between the pump case dunnage, cold edge Cuprum alloy crosshead sliding sleeve in cylinder sleeve then, crosshead sliding sleeve endoporus is with pump case fine finishing, the characteristics of this integrated morphology pump case are compact structures, but the crosshead sliding sleeve use certain hour wearing and tearing overproof after the boring reprocessing of falling to reset repair, shortcoming is: 1. because crosshead casing and the integrated pump case welded structure complexity that causes of crankcase body, cylinder sleeve, end plate and stiffening plate etc. partly weld and are difficult for welding, and cause entire pump housing type huge, difficulty of processing is big; 2. cold edge crosshead sliding sleeve technology controlling and process is bad, and the crosshead sliding sleeve becomes flexible easily even comes off, thereby causes car load to shut down, and it is multiple that pump case returns repair in shop, incur loss through delay job scheduling, and the Cu alloy material price is more expensive, and the pump case manufacture cost is higher; 3. cylinder sleeve and pump case end plate welding, each pull bar screw of end plate place is stressed big and uneven, and the end plate weld joint place is easy to generate crackle and causes whole pump case to scrap.

Summary of the invention

The object of the present invention is to provide a kind of novel plunger pump crosshead casing, it is a kind of simple in structure, long service life, processing, assembling and casing easy to maintenance.

Technological scheme of the present invention realizes as follows:

The present invention is a casing, the front-end face of its casing and ear end face respectively have 3 large through-holes of dividing equally that run through mutually, its large through-hole is the reciprocating slideway of crosshead, 3 large through-holes of dividing equally that front-end face and ear end face run through mutually respectively have an annular seal groove outward, be used to install seal ring, seal.Front-end face and ear end face up and down symmetry run through mutually 8 through holes and 8 small through hole are arranged, 8 through holes are used for the installation of pull bar, 8 small through hole are used for bolt crosshead casing and crankcase body are installed and fixed.Respectively there are a draining hole and lubricated oil inlet hole in the upper and lower of each large through-hole, only uses following draining hole and top lubricated oil inlet hole during installation, and top draining hole and following lubricated oil inlet hole block up with threaded insert; Top draining hole and following lubricated oil inlet hole then are that turn-over uses; There are a plurality of screws of dividing equally the upper-end surface of its casing and bottom surface, and are used to install and fix training hopper and return line.

Good effect of the present invention is:

The crosshead casing is the founding type structure, is convenient to produce in batches, and cost is lower.8 through holes can link into an integrated entity pump head body, crosshead casing and crankcase body with pull bar, simple in structure, easy for installation, crosshead cabinets cavity through hole is as the crosshead slideway, selflubricating and wear resistance all are better than the Cuprum alloy sliding sleeve, and do not have the defective of press-offing.The crosshead casing of cast structure has been avoided because the risk that weld defects causes the pump case cracking to be scrapped simultaneously.The crosshead casing is complete symplex structure, need not scrap behind interior cylindrical hole one lateral wearing, and turnable continues to use, and long service life also is convenient to processing, assembling and maintenance.

Description of drawings

Fig. 1 is a plan view of the present invention;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the plan view of Fig. 1;

Fig. 4 is the B-B sectional view of Fig. 3;

Fig. 5 is the rear view of Fig. 1.

Embodiment

Below in conjunction with accompanying drawing embodiment, the invention will be further described:

Referring to Fig. 1 and Fig. 5,3 large through-holes of dividing equally that run through mutually 8 are respectively arranged on crosshead casing 3 front-end faces and the ear end face, large through-hole 8 is the reciprocating slideways of crosshead, the installation that symmetrical up and down eight through holes 9 that run through mutually of front-end face and ear end face and 10, eight through holes 9 of eight small through hole are used for pull bar; Eight small through hole 10 are used for bolt 2 crosshead casing 3 are fixed on crankcase body; Front-end face and the ear end face outside of 3 large through-holes of dividing equally that run through mutually 8 separately have annular seal groove 11, and O type circle is installed on the annular seal groove 11, play the end face seal effect.

Referring to Fig. 2,4, near crosshead casing 3 front-end faces directly over each large through-hole 8 and under two places respectively be processed with a draining hole 12, only use following draining hole 12 when installing and using, on top draining hole 12 usefulness plug screws were stifled, exchangeable was used when turn-over uses; Simultaneously directly over each large through-hole 8 of crosshead casing 3 middle part correct positions and under two places respectively be processed with lubricated oil inlet hole 13, be used for lubricated crosshead, only use top lubricated oil inlet hole 13 when installing and using, on following lubricated oil inlet hole 13 usefulness plug screws were stifled, exchangeable was used when turn-over uses; Also be processed with screw 15 on the ear end face simultaneously, be used for bolt crosshead casing end plate is fixed on crosshead casing 3.

Referring to Fig. 3, there are a plurality of screws 16 crosshead casing 3 upper-end surfaces, are used for installing and fixing of Stuffing box and return line.

Claims

1. plunger pump crosshead casing, it is characterized in that: crosshead casing (3) front-end face and ear end face respectively have 3 large through-holes of dividing equally that run through (8), an annular seal groove (11) is respectively arranged outside 3 large through-holes of dividing equally (8) separately that front-end face and ear end face run through mutually, front-end face and ear end face symmetry up and down are penetrated with 8 through holes (9) and 8 small through hole (10) mutually, respectively there are a draining hole (12) and lubricated oil inlet hole (11) in the upper and lower of each large through-hole (8), and there are a plurality of screws of dividing equally (13) upper-end surface and bottom surface.