CN201262136Y

CN201262136Y - Three-cylinder single-acting piston pump

Info

Publication number: CN201262136Y
Application number: CNU200820190983XU
Authority: CN
Inventors: 王剑波; 涂可明; 白成
Original assignee: HUBEI SZ PETROLEUM EQUIPMENT CO Ltd
Current assignee: HUBEI SZ PETROLEUM EQUIPMENT CO Ltd
Priority date: 2008-09-23
Filing date: 2008-09-23
Publication date: 2009-06-24
Anticipated expiration: 2018-09-23

Abstract

The utility model relates to a piston pump, in particular to the triplex single-function piston pump. The piston pump comprises a crankcase, a crankshaft, a connecting rod, a crosshead, a piston, a pump head body, a spring, a suction valve, a discharge valve, a suction pipe, a discharge pipe and the like. The pump head body is arranged on one side of the crankcase, the crankshaft is arranged in the crankcase, the connection rod is arranged on the crankshaft through a connecting rod bush, and the other end of the connecting rod is connected with the piston arranged on the pump head body through the crosshead; the suction valve and the discharge valve are arranged in the pump head body, and the suction pipe and the discharge pipe are arranged on the suction valve and the discharge valve respectively. Each cylinder of the triplex single-function piston pump has only one suction valve and one discharge valve, the structure is compact, and the connecting rod does not need to be sealed, thereby reducing the types and the number of vulnerable parts. As the piston pump adopts the combination of three hydraulic cylinders, the fluctuations of the output pressure are smaller, thereby improving the service lives of the piston pump and a high-pressure manifold. Furthermore, the piston pump has small size and convenient installation, thereby being applicable to small cementing and well servicing equipment for use.

Description

Three cylinder single action piston pumps

Technical field:

The utility model relates to a kind of reciprocating pump, particularly a kind of three cylinder single action piston pumps.

Background technique:

Oil equipment is increasing to the demand of small-power triplex pump both at home and abroad at present, especially along with the high speed development of China Petroleum, and new exploratory area, oil field is constantly found, the application of the small-sized special vehicle of China's oil industry also more and more widely, supporting with it small-power triplex pump demand is also corresponding all to be increased.But more domestic mainly production High-power Mud Pump of large-scale petroleum enginerring works, the manufacturer of small-power slurry pump is very limited, and external small-power slurry pump costs an arm and a leg, and the also domestic use of incompatibility of certain structures is so the market of three cylinder single action piston pumps is very huge.Simultaneously, also can make this series products realize production domesticization, reduce the manufacture cost of oil equipment.

Summary of the invention:

The purpose of this utility model is: provide a kind of and adopt three to suck valve and three triplex single action pump structures of discharging valve, the delivery pressure fluctuation is less, help improving the life-span of pump and high pressure pipe joint, and strokes per minute height, in light weight, volume is little, compact structure, easy for installation, be applicable to three cylinder single action piston pumps of small-sized well cementation, well servicing equipment.

The utility model is to realize above-mentioned purpose by following technical solution:

A kind of three cylinder single action piston pumps, it is made of power end assembly, fluid end assembly, suction pipe, discharge tube, power end lubricating and cooling system and fluid end lubricating and cooling system; The power end assembly is made up of crankcase, bent axle, connecting rod, connecting rod tile, crosshead; The fluid end assembly is made up of three split type single cylinder fluid ends, and each single cylinder fluid end comprises piston, pump head body, spring, suction valve, discharges each cover of valve; It is characterized in that: a side of crankcase is connected with three pump head bodies, and bent axle is housed in the crankcase, and a cover connecting rod and a connecting rod tile respectively is installed on three place's axle journals of bent axle, and the other end of every connecting rod is connected with piston by link pin, crosshead, clip assembly; Be equipped with in each pump head body and suck one of valve and discharge one of valve; A suction pipe is equipped with in three lower ends that suck valve, and a discharge tube is equipped with on three right sides, upper end of discharging valve, and suction pipe is with three fluid end suction port UNICOMs, and discharge tube is with three fluid end exhaust port UNICOMs.

On the crosshead in the described crankcase power end lubricating and cooling system is housed, the fluid end lubricating and cooling system is housed on the piston cylinder of pump head body.

The beneficial effects of the utility model are: the pump head body inner structure of the fluid end of this three cylinders single action piston pump is fairly simple, and every cylinder has only one to suck valve and a discharge valve, marshalling, compactness, and piston structure obtains simplifying.And connecting rod do not need sealing, reduced the description and quantity of easily damaged parts.Because adopted three oil hydraulic cylinder combinations, the pressure surge of output is less, has improved the life-span of reciprocating pump and high pressure pipe joint.This model utility is owing to the strokes per minute height, and in light weight, volume is little, and compact structure is easy for installation, is highly suitable for small-sized well cementation, well servicing equipment use, makes the small-power slurry pump realize production domesticization, has reduced the manufacture cost of China's oil equipment.

Description of drawings:

Fig. 1 is the plan view of three cylinder single action piston pumps;

Fig. 2 is the plan view of three cylinder single action piston pumps;

Fig. 3 is the left view of three cylinder single action piston pumps.

Among the figure: 1, crankcase, 2, bent axle, 3, the connecting rod tile, 4, connecting rod, 5, the power end lubricating and cooling system, 6, crosshead, 7, piston, 8, the fluid end lubricating and cooling system, 9, pump head body, 10, discharge valve, 11, discharge tube, 12, spring, 13, suck valve, 14, suction pipe, 15, piston cylinder, 16, link pin, 17, the clip assembly.

Embodiment:

This three cylinders single action piston pump is by crankcase 1, bent axle 2, connecting rod tile 3, connecting rod 4, power end lubricating and cooling system 5, crosshead 6, piston 7, fluid end lubricating and cooling system 8, pump head body 9, discharge valve 10, discharge tube 11, spring 12, suction valve 13 and suction pipe 14 constitute, and are combined by three split type single cylinder piston pumps.The pump housing of each split type single cylinder piston pump is made of crankcase 1 and pump head body 9, pump head body 9 is contained in a side of crankcase 1, bent axle 2 is housed in the crankcase 1, three cover connecting rod tile 3 and connecting rods 4 are housed on the bent axle 2, and the other end of every connecting rod 4 is connected the piston 7 that is contained in the pump head body 9 with link pin 16, clip assembly 17 by crosshead 6.Be equipped with one in each pump head body 9 and suck valve 13 and a discharge valve 10, on every suction valve 13 spring 12 is housed, the lower end connects suction pipe 14, discharges on the valve 10 for every spring 12 is housed, and the right side, upper end connects discharge tube 11.Suction pipe is with three suction port UNICOMs, and discharge tube is with three exhaust port UNICOMs.On the crosshead 6 in the crankcase 1 power end lubricating and cooling system 5 is housed, power end adopts forces continuous pressure lubricated.On the piston cylinder 15 of pump head body 9 fluid end lubricating and cooling system 8 is housed, water spray cooling (referring to accompanying drawing 1-3) is adopted in piston 7 operations of fluid end.

During work, the bent axle 2 that is driven in the crankcase 1 by speed reducer rotates, and drive motion formation negative pressure in the piston cylinder 15 of pistons 7 on pump head body 9 by connecting rod 4 and crosshead 6, make spring 12 compressions that suck in the valve 13, sucking valve 13 opens, then suction pipe 14 injects clear water to the inner chamber of pump head body 9, bent axle 2 when the speed reducer band makes piston 7 in pump head body 9 during to-and-fro motion, the hydraulic pressure of pump head body 9 inner chambers increases, the spring 12 in the valve 10 is discharged in compression, discharge valve 10 and be opened, high-pressure water flow is then discharged from discharge tube 11.When quitting work, speed reducer does not drive bent axle 2 rotations in the crankcase 1, and the hydraulic pressure of pump head body 9 inner chambers reduces, and sucks valve 13 and discharges valve 10 return under the effect of spring 12.

Claims

1, a kind of three cylinder single action piston pumps, it is made of power end assembly, fluid end assembly, suction pipe (14), discharge tube (11), power end lubricating and cooling system (5) and fluid end lubricating and cooling system (8); The power end assembly is made up of crankcase (1), bent axle (2), connecting rod (4), connecting rod tile (3), crosshead (6); The fluid end assembly is made up of three split type single cylinder fluid ends, and each single cylinder fluid end comprises piston (7), pump head body (9), spring (12), sucks valve (13), discharges each cover of valve (10); It is characterized in that: a side of crankcase (1) is connected with three pump head bodies (9), bent axle (2) is housed in the crankcase (1), one cover connecting rod (4) and connecting rod tile (3) respectively is installed on three place's axle journals of bent axle (2), and the other end of every connecting rod (4) is connected with piston (7) by link pin (16), crosshead (6), clip assembly (17); Be equipped with in each pump head body (9) and suck (13) one of valves and discharge (10) one of valves; A suction pipe (14) is equipped with in three lower ends that suck valve (13), and a discharge tube (11) is equipped with on three right sides, upper end of discharging valve (10), and suction pipe (14) is with three fluid end suction port UNICOMs, and discharge tube (11) is with three fluid end exhaust port UNICOMs.

2, three cylinder single action piston pumps according to claim 1, it is characterized in that: on the crosshead (6) in the described crankcase (1) power end lubricating and cooling system (5) is housed, on the piston cylinder (15) of pump head body (9) fluid end lubricating and cooling system (8) is housed.