CN212535957U

CN212535957U - Intermittent working five-cylinder high-power fracturing pump

Info

Publication number: CN212535957U
Application number: CN202021479019.6U
Authority: CN
Inventors: 傅宏伟; 姜涌; 郭志军
Original assignee: Jiangsu Aifutaike Energy Equipment Co ltd
Current assignee: Jiangsu Aifutaike Energy Equipment Co ltd
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2021-02-12
Anticipated expiration: 2030-07-23

Abstract

The utility model discloses an intermittent working five-cylinder high-power fracturing pump, which comprises an input gear shaft, a large gear connected with the input gear shaft, a hydraulic cylinder and five independent ┠ -shaped hydraulic cylinder cavities arranged in the hydraulic cylinder; the hydraulic cylinder cavity comprises a lower valve and a lower valve seat arranged at the lower part, an upper valve and an upper valve seat arranged at the upper part, a fluid medium inlet at the bottom, a fluid medium outlet at the top and a plunger piston at the side part, wherein the lower valve and the upper valve are both one-way valves, and the fluid medium inlet and the fluid medium outlet are both communicated with the outside of the hydraulic cylinder cavity; a transmission system is arranged between the large gear and the plunger, and the transmission system can transmit kinetic energy to the plunger, so that the plunger can reciprocate in the cavity of the hydraulic cylinder cavity. The utility model discloses equipment has reduced the fluid and has fluctuated under the high pressure condition, has reduced equipment vibration, has improved the reliability of equipment operation, has improved equipment discharge capacity simultaneously, more is fit for shale gas exploitation demand.

Description

Intermittent working five-cylinder high-power fracturing pump

Technical Field

The utility model discloses a five high-power fracturing pumps of jar of intermittent type formula work belongs to fracturing pump technical field.

Background

The domestic fracturing pump mostly adopts a three-cylinder 2000 horsepower or 2250 horsepower plunger pump as the fracturing pump, is mainly applied to oil field production increasing operation, and when the fracturing pump is used for shale gas exploitation, because the shale gas exploitation fracturing needs large displacement, high pressure and long operation time, the common three-cylinder fracturing pump can not adapt to the oil field operation requirement, so that a five-cylinder 2500 horsepower high-power fracturing pump needs to be developed.

When the three-cylinder fracturing pump discharges liquid, the fluid fluctuation is large under the condition of high pressure due to the difference of the crank deflection angles of 120 degrees, the equipment is easy to vibrate, the equipment and parts are damaged, and the reliability of the equipment is poor.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: to prior art's defect, the utility model provides a five high-power fracturing pumps of jar of intermittent type formula work.

The technical scheme is as follows: in order to realize the purpose, the utility model discloses a technical scheme as follows:

an intermittent working five-cylinder high-power fracturing pump comprises an input gear shaft, a large gear connected with the input gear shaft, a hydraulic cylinder and five independent ┠ -type hydraulic cylinder cavities arranged in the hydraulic cylinder; the hydraulic cylinder cavity comprises a lower valve and a lower valve seat arranged at the lower part, an upper valve and an upper valve seat arranged at the upper part, a fluid medium inlet at the bottom, a fluid medium outlet at the top and a plunger piston at the side part, wherein the lower valve and the upper valve are both one-way valves, and the fluid medium inlet and the fluid medium outlet are both communicated with the outside of the hydraulic cylinder cavity; a transmission system is arranged between the large gear and the plunger, and the transmission system can transmit kinetic energy to the plunger, so that the plunger can reciprocate in the cavity of the hydraulic cylinder cavity.

The one-way valve is characterized in that the lower valve can only move up and down on the upper part of the lower valve seat along with the change of air pressure in the cylinder body, the valve is opened when the lower valve moves up, the valve is closed when the lower valve moves down due to the support of the lower valve seat, and the design and the principle of the upper valve and the upper valve seat are the same.

Preferably, the transmission system comprises a crankshaft, a connecting rod, a crosshead and an intermediate rod which are connected in sequence, the large gear drives the crankshaft to rotate, the rotating motion of the crankshaft is converted into the reciprocating motion of the intermediate rod through the connecting rod, the crosshead and the intermediate rod, and the intermediate rod drives the plunger to reciprocate in the hydraulic cylinder.

Further preferably, the crankshaft has five crank throws, each corresponding crank throw corresponds to a set of connecting rod, crosshead and intermediate rod, and the deviation angle of the crank throws is 72 degrees.

Preferably, the five independent '┠' hydraulic cylinder chambers all have the same transmission system.

Preferably, the fluid medium inlets of the five independent '┠' type hydraulic cylinder cavities are respectively communicated with the outside of the hydraulic cylinder cavity.

Preferably, the fluid medium outlets of the five separate "┠" type cylinder chambers are all in communication with each other and with the exterior of the cylinder through a collective outlet.

Preferably, the outside of the hydraulic cylinder is also provided with a pressure test instrument interface.

Preferably, the five fluid medium inlets are respectively and independently connected with a cleaning port, and the cleaning ports are communicated with the outside of the hydraulic cylinder.

Has the advantages that: compared with the prior art, the utility model discloses a five reciprocating type structures, crank deflection angle differ 72 degrees, under the high pressure condition, have reduced the fluid and have fluctuated, have reduced equipment vibration, have improved the reliability of equipment operation, have improved equipment discharge capacity simultaneously, more are fit for the shale gas exploitation demand.

Drawings

Fig. 1 is an external structure schematic diagram of an intermittent working five-cylinder high-power fracturing pump.

Fig. 2 is a schematic diagram of the internal structure of an intermittent working five-cylinder high-power fracturing pump.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Examples

An intermittent working five-cylinder high-power fracturing pump is shown in figures 1 and 2 and comprises an input gear shaft 1, a large gear 2 connected with the input gear shaft 1, a hydraulic cylinder 8 and five independent ┠ -shaped hydraulic cylinder cavities 81 arranged in the hydraulic cylinder 8; the hydraulic cylinder cavity 81 comprises a lower valve 9 and a lower valve seat 10 which are arranged at the lower part, an upper valve 11 and an upper valve seat 12 which are arranged at the upper part, a fluid medium inlet 13 at the bottom, a fluid medium outlet 14 at the top and a plunger 7 at the side part, the lower valve 9 and the upper valve 11 are all one-way valves, and the fluid medium inlet 13 and the fluid medium outlet 14 are both communicated with the outside of the hydraulic cylinder cavity 81; a transmission system is arranged between the gearwheel 2 and the plunger 7, and can transmit kinetic energy to the plunger 7, so that the plunger 7 can reciprocate in the cavity of the hydraulic cylinder cavity 81.

The transmission system comprises a crankshaft 3, a connecting rod 4, a crosshead 5 and an intermediate rod 6 which are sequentially connected, the large gear 2 drives the crankshaft 3 to rotate, the rotating motion of the crankshaft 3 is converted into the reciprocating motion of the intermediate rod 6 through the connecting rod 4, the crosshead 5 and the intermediate rod 6, and the intermediate rod 6 drives a plunger 7 to reciprocate in a hydraulic cylinder 8.

The crankshaft 3 has five crank throws, each corresponding to a set of connecting rod 4, crosshead 5 and intermediate rod 6, the deviation angle of the crank throws being 72 degrees.

The fluid medium inlets 13 of the five independent ┠ -shaped hydraulic cylinder cavities 81 are respectively and independently communicated with the outside of the hydraulic cylinder cavities 81, the cleaning ports 17 are respectively and independently connected with the five fluid medium inlets 13, and the cleaning ports 17 are communicated with the outside of the hydraulic cylinder 8.

The fluid medium outlets 14 of the five separate "┠" type cylinder chambers 81 are all in communication with each other and with the exterior of the cylinder 8 through the collective outlet 15.

And a pressure test instrument interface 16 is also arranged outside the hydraulic cylinder (8).

The working principle of the intermittent working five-cylinder high-power fracturing pump is as follows:

the 2500 horsepower high-power fracturing pump of five jars adopts reciprocating type structure, and input gear axle 1 drives the gear wheel 2 of bent axle both sides, and gear wheel 2 drives the bent axle 3 and rotates, through connecting rod 4, cross head 5, intermediate lever 6, makes the rotary motion of bent axle 3 change into the reciprocating motion of intermediate lever 6, and intermediate lever 6 drives plunger 7 reciprocating motion in hydraulic cylinder 8. The valve body and the valve seat in the hydraulic cylinder cavity 81 form a complete one-way valve, and both the upper valve and the lower valve can only move up and down on the upper parts of the corresponding valve seats; when the plunger 7 moves backwards, negative pressure is generated in the inner cavity of the hydraulic cylinder cavity 81, the upper valve 11 in the cavity is supported downwards by the upper valve seat 12, the upper valve is closed, the lower valve 9 moves upwards and is opened, and fluid media enter the cavity from the lower valve 9 and are filled; when the plunger 7 moves forwards, the cavity is pressurized, the lower valve 9 moves downwards and is closed, the upper valve 11 moves upwards, the upper valve 11 is opened, and the fluid medium is discharged. And each revolution of the crankshaft 3, five cylinder bodies complete respective plunger motion, namely, one-time liquid suction and discharge work, and the five cylinder bodies respectively discharge fluid media.

The equipment adopts five-cylinder liquid drainage, the crank deviation angle is reduced from 120 degrees to 72 degrees, the fluctuation of fluid is obviously reduced, especially under the condition of exceeding 80MPa in the fracturing operation, the vibration of the equipment is reduced, the running stability and reliability of the equipment are improved, meanwhile, the five-cylinder liquid drainage is changed from three-cylinder liquid drainage, the liquid drainage quantity of the equipment is improved, and the shale gas exploitation requirement is more suitable.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, without departing from the design concept of the present invention, several modifications and equivalent substitutions can be made, and these modifications and equivalent substitutions should also be considered as the protection scope of the present invention.

Claims

1. An intermittent working five-cylinder high-power fracturing pump is characterized by comprising an input gear shaft (1), a large gear (2) connected with the input gear shaft (1), a hydraulic cylinder (8) and five independent ┠ -type hydraulic cylinder cavities (81) arranged in the hydraulic cylinder (8); the hydraulic cylinder cavity (81) comprises a lower valve (9) and a lower valve seat (10) which are arranged at the lower part, an upper valve (11) and an upper valve seat (12) which are arranged at the upper part, a fluid medium inlet (13) at the bottom, a fluid medium outlet (14) at the top and a plunger (7) at the side part, wherein the lower valve (9) and the upper valve (11) are both one-way valves, and the fluid medium inlet (13) and the fluid medium outlet (14) are both communicated with the outside of the hydraulic cylinder cavity (81); a transmission system is arranged between the large gear (2) and the plunger (7), and the transmission system can transmit kinetic energy to the plunger (7) so that the plunger (7) can reciprocate in the cavity of the hydraulic cylinder cavity (81).

2. The intermittently operated five-cylinder high-power fracturing pump according to claim 1, wherein the transmission system comprises a crankshaft (3), a connecting rod (4), a crosshead (5) and an intermediate rod (6) which are connected in sequence, the crankshaft (3) is driven by the large gear (2) to rotate, the rotating motion of the crankshaft (3) is converted into the reciprocating motion of the intermediate rod (6) through the connecting rod (4), the crosshead (5) and the intermediate rod (6), and the plunger (7) is driven by the intermediate rod (6) to reciprocate in the hydraulic cylinder (8).

3. An intermittently operating five-cylinder high power fracturing pump according to claim 2, characterized in that the crankshaft (3) has five throws, one set of connecting rod (4), crosshead (5) and intermediate rod (6) for each respective throw, the deflection angle of the throws being 72 degrees.

4. An intermittently operating five-cylinder high power fracturing pump according to claim 1, characterized in that the five separate "┠" type hydraulic cylinder chambers (81) all have the same transmission system.

5. An intermittently operating five-cylinder high power fracturing pump according to claim 1, characterized in that the fluid medium inlets (13) of the five separate "┠" type cylinder chambers (81) are each separately in communication with the outside of the cylinder chamber (81).

6. An intermittently operating five-cylinder high power fracturing pump according to claim 1, characterized in that the fluid medium outlets (14) of the five separate "┠" -type cylinder chambers (81) are all in communication with each other and with the outside of the cylinder (8) through a collective outlet (15).

7. An intermittently operating five-cylinder high-power fracturing pump according to claim 1, characterized in that the outside of the hydraulic cylinder (8) is also provided with a pressure test instrument interface (16).

8. An intermittently operating five-cylinder high power fracturing pump according to claim 1, characterized in that the five fluid medium inlets (13) are each individually connected with a cleaning port (17), the cleaning ports (17) being in communication with the outside of the hydraulic cylinder (8).