CN203594593U

CN203594593U - Novel piston pump crosshead box body

Info

Publication number: CN203594593U
Application number: CN201320061568.5U
Authority: CN
Inventors: 李蓉; 李德清; 吕小飞; 黄冠
Original assignee: SJ Petroleum Machinery Co
Current assignee: SJ Petroleum Machinery Co
Priority date: 2013-02-04
Filing date: 2013-02-04
Publication date: 2014-05-14
Anticipated expiration: 2023-02-04

Abstract

The utility model discloses a novel pump crosshead box body. A front end surface of the box body and a back end surface of the box body are designed to be equipped with three big through holes, eight through holes and eight small through holes. Three big through holes are equipped with annular sealing grooves. The upper part and the lower part of each though hole are equipped with a drain hole. An upper end surface of the box body and the ground are equipped with a plurality of well-distributed screw holes. According to the casting structure of the novel piston pump crosshead box body in the utility model, the risk of scrap due to welding defects can be avoided; the model can be turned over to use; and an integration can be formed by a connection of a pump head body, a crosshead body and a crankcase box body by using a tension rod. By using a crosshead slideway with three big through hole seats, self-lubrication and abrasion resistance are better than copper alloy slide sleeve without the defect of degloving, therefore the piston pump crosshead box body has the advantages of long service life, simple process and installation and easy maintenance.

Description

A kind of Novel plunger pump crosshead casing

Technical field

The utility model relates to casing.

Background technique

In recent years, due to the increase day by day of super deep layer or ultra-large fracturing work amount, more and more urgent to the demand of the large-scale complete pressure break equipment adapting with it.Pressure break pump truck is the nucleus equipment of Frac unit, and plunger pump is as the critical component of pressure break pump truck, and its performance and technical merit have decisive influence to pressure break pump truck down to the overall operation ability of large-scale complete pressure break equipment.Plunger pump crosshead casing is the important component part of power end of plunger pump, its one end is connected with crankcase body, the other end connects fluid end pump head body by pull bar, its Main Function be 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 welded steel pump shell structure being integrated in one with crankcase body both at home and abroad at present, steel cylinder sleeve welding is arranged in the space between pump case dunnage, then cold edge Cuprum alloy crosshead sliding sleeve in cylinder sleeve, the fine finishing together with pump case of crosshead sliding sleeve endoporus, the feature of this integrated morphology pump case is compact structure, crosshead sliding sleeve is used the certain hour wearing and tearing reprocessing of can boring falling to reset after overproof and is repaired, shortcoming is: 1. because crosshead casing and the integrated pump case welded structure complexity that causes of crankcase body, cylinder sleeve, the welding of the part such as end plate and stiffening plate is difficult for welding, and cause whole pump case build huge, difficulty of processing is large, 2. cold edge crosshead sliding sleeve technology controlling and process is bad, and crosshead sliding sleeve is easily loosening even to come 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 Cu alloy material price is more expensive, and pump case manufacture cost is higher, 3. cylinder sleeve and the welding of pump case end plate, the each pull bar screw in end plate place is stressed large and uneven, and end plate weld joint place easily cracks and causes whole pump case to scrap.

Summary of the invention

The purpose of this utility model is to provide a kind of Novel plunger pump crosshead casing, and it is a kind of simple in structure, long service life, processing, assembling and casing easy to maintenance.

The technical solution of the utility model realizes as follows:

The utility model is a casing, the front-end face of its casing and ear end face respectively have 3 large through-holes that mutually run through of dividing equally, 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 for installing seal ring, seal.What the upper and lower symmetry of front-end face and ear end face ran through mutually has 8 through holes and 8 small through hole, and 8 through holes are used for the installation of pull bar, and 8 small through hole are installed fixing for bolt by crosshead casing and crankcase body.Respectively there are a draining hole and lubricated oil inlet hole in the upper and lower of each large through-hole, only uses draining hole below and lubricated oil inlet hole above when installation, and draining hole above and lubricated oil inlet hole below block with threaded insert; Draining hole above and lubricated oil inlet hole are below for turn-over uses; There are multiple screws of dividing equally the upper-end surface of its casing and bottom surface, for fixing training hopper and return line are installed.

Good effect of the present utility model is:

Crosshead casing is founding type structure, is convenient to batch production, 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 crosshead slideway, selflubricating and wear resistance are all better than Cuprum alloy sliding sleeve, and do not have the defect of press-offing.Simultaneously the crosshead casing of cast structure has been avoided because weld defects causes the pump case risk of scrapping that ftractures.Crosshead casing is full symmetric structure, after interior cylindrical hole one lateral wearing, does not need to scrap, and turnable continues to use, and long service life is also convenient to processing, assembling and maintenance.

Accompanying drawing explanation

Fig. 1 is the utility model plan view;

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 utility model is described in further detail:

Referring to Fig. 1 and Fig. 5, on crosshead casing 3 front-end faces and ear end face, respectively there are 3 large through-holes that mutually run through 8 of dividing equally, large through-hole 8 is the reciprocating slideways of crosshead, upper and lower symmetrical eight through holes 9 that mutually run through of front-end face and ear end face and 10, eight through holes 9 of eight small through hole are for the installation of pull bar; Eight small through hole 10 are fixed on crankcase body for bolt by crosshead casing 3; Front-end face and the ear end face separately outside of 3 large through-holes that mutually run through 8 of dividing equally have annular seal groove 11,14, and mounting O-shaped rings on annular seal groove 11 and 14 plays end face seal action.

Referring to Fig. 2,4, near crosshead casing 3 front-end faces directly over each large through-hole 8 and under two places be respectively processed with a draining hole 12, while installing and using, only use draining hole 12 below, draining hole 12 use plug screws above block, and in the time that turn-over uses, exchangeable is used; Simultaneously directly over each large through-hole 8 of crosshead casing 3 middle part correct positions and under two places be respectively processed with lubricated oil inlet hole 13, for lubricated crosshead, while installing and using, only use lubricated oil inlet hole 13 above, lubricated oil inlet hole 13 use plug screws below block, and in the time that turn-over uses, exchangeable is used; On ear end face, be also processed with screw 15 simultaneously, for bolt, crosshead casing end plate be fixed on to crosshead casing 3.

Referring to Fig. 3, there are multiple screws 16 crosshead casing 3 upper-end surfaces, fix for the installation of Stuffing box and return line.

Claims

1. a 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 that run through (8) of dividing equally, outside 3 large through-holes of dividing equally (8) separately that front-end face and ear end face run through mutually, respectively there is an annular seal groove (11), the upper and lower symmetry of front-end face and ear end face is 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 (13) in the upper and lower of each large through-hole (8), and there are multiple screws of dividing equally (16) upper-end surface and bottom surface.