Oil-gas two-way circulating pump

Abstract

The utility model relates to the technical field of petrochemical engineering technical equipment, in particular to an oil-gas two-way circulating pump which comprises a cylinder barrel body, a piston assembly, a driving medium pipeline, a driven medium pipeline and a reversing mechanism. Two partition plates are fixedly arranged in the cylinder barrel at intervals and divide the interior of the cylinder barrel into two working cavities and a middle cavity, and the two working cavities are located at the two ends of the middle cavity respectively. The piston assembly comprises a piston rod and two piston heads, the two piston heads are slidably arranged in the two working cavities correspondingly, and the two ends of the piston rod penetrate through the two partition plates and are connected with the two piston heads correspondingly; the driving medium pipeline is used for driving the piston head to move; the driven medium pipeline is used for pumping out a medium; the reversing mechanism is arranged in the middle cavity, the power input end of the reversing mechanism is connected with the piston rod, and the power output end of the reversing mechanism is connected with the main reversing valve. The utility model has the advantages that the operation of the pump is driven by using the pressure energy of oil-gas media, and different media can be adopted for cyclic pressurization.

Description

Technical Field

[0001] The utility model relates to the technical field of petrochemical equipment, in particular to an oil and gas two-way circulation pump. Background Art

[0002] During the pipeline transmission of oil and gas resources, there is relatively high pressure energy. In the prior art, this part of the energy has not been effectively utilized, resulting in energy waste. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide an oil and gas two-way circulation pump.

[0004] The purpose of the utility model is realized through the following technical solutions: an oil and gas two-way circulation pump, comprising:

[0005] A cylinder barrel, in which two partitions are fixedly arranged at intervals. The two partitions divide the inside of the cylinder barrel into two working chambers and an intermediate chamber. The two working chambers are respectively located at both ends of the intermediate chamber;

[0006] A piston assembly, which includes a piston rod and two piston heads. The two piston heads are respectively slidably arranged in the two working chambers. Both ends of the piston rod penetrate through the two partitions and are respectively connected to the two piston heads;

[0007] A driving medium pipeline, which includes a main driving medium pipe, a main reversing valve and driving medium pipes. The main driving medium pipe is used for inputting the driving medium. The main driving medium pipe is communicated with the main reversing valve. One ends of the two driving medium pipes are respectively connected to both ends of the cylinder barrel and communicated with the two working chambers, and the other ends are both communicated with the main reversing valve;

[0008] A driven medium pipeline, which includes an inlet pipe, an outlet pipe and a driving pipe. The driving pipe is connected to the partition and communicated with the working chamber. The inlet pipe and the outlet pipe are both communicated with the driving pipe. One-way valves are arranged on both the inlet pipe and the outlet pipe;

[0009] A reversing mechanism, which is arranged in the intermediate chamber. The power input end of the reversing mechanism is connected to the piston rod, and the power output end of the reversing mechanism is connected to the main reversing valve.

[0010] By arranging two working chambers, the utility model uses the driving medium pipeline to input the medium to one end of the working chamber to drive the piston head to move. After the piston head moves, it drives the driven medium at the other end of the working chamber, so that the driven medium can be pumped out, and the pressure energy of the oil and gas resources can be fully utilized.

[0011] In some embodiments, the commutation mechanism includes a pilot commutation valve and a driving mechanism, and the main commutation valve includes a pneumatic commutation valve or a hydraulic commutation valve;

[0012] The pilot commutation valve is connected to the main driving medium pipe through a pipeline, and the pilot commutation valve is connected to the main commutation valve through a control pipeline to control the commutation of the commutation valve. The valve core of the pilot commutation valve is connected to the piston rod through a driving mechanism. The commutation mechanism is used to commutate the main commutation valve when the piston head reaches the maximum stroke so that the piston head moves in the reverse direction.

[0013] In some embodiments, the driving mechanism includes a sliding sleeve and a driving retaining ring; annular bosses are provided at both ends inside the sliding sleeve, and the sliding sleeve is slidably connected to the piston rod through the bosses;

[0014] The driving retaining ring is fixedly arranged on the piston rod, and the driving retaining ring is located between the two bosses inside the sliding sleeve;

[0015] A connecting structure for connecting the valve core of the pilot commutation valve is arranged on the outer surface of the sliding sleeve. When the piston moves backward, it drives the piston rod to move. When the piston rod moves a certain stroke, the driving retaining ring pushes the boss at one end of the sliding table, causing the sliding sleeve to move. After the sliding sleeve moves, it drives the valve core of the pilot commutation valve to move through the connecting structure, causing the pilot commutation valve to commutate, and further causing the main commutation valve to commutate.

[0016] In some embodiments, the connecting structure includes a chute, and the chute is arranged on the outer surface of the sliding sleeve along the length direction of the sliding sleeve, and the valve core of the pilot commutation valve is slidably connected to the chute. The chute is provided to provide a space for relative sliding between the sliding sleeve and the valve core of the pilot commutation valve.

[0017] In some embodiments, the cylinder barrel includes an intermediate cylinder, a working chamber cylinder and an end plate. The intermediate chamber is arranged inside the intermediate cylinder, and the two working chamber cylinders are respectively arranged at both ends of the intermediate cylinder. The partition plate is clamped between the intermediate cylinder and the working chamber cylinder, and the end plate is arranged at the end of the working chamber cylinder. The working chamber is formed among the end plate, the working chamber cylinder and the partition plate. The cylinder barrel is arranged in a split manner, which is convenient for disassembly and repair.

[0018] In some embodiments, the edge of the end plate protrudes from the working chamber cylinder, and the edge of the end plate is connected to the intermediate cylinder through bolts. Through the bolt connection between the end plate and the intermediate cylinder, the end plate and the intermediate cylinder clamp the working chamber cylinder and the partition plate, and only the end plate needs to be removed when disassembling the pump for overall disassembly.

[0019] In some embodiments, a mounting bracket is arranged on the cylinder barrel. The mounting bracket facilitates the installation and fixation of the pump.

[0020] In some embodiments, a ball valve is provided on the driving medium pipe. The start and stop of the pump can be controlled through the ball valve.

[0021] The present utility model has the following advantages:

[0022] The present utility model utilizes the pressure energy of oil or gas source to push the piston head so that oil or gas is driven in the driven medium pipeline. A reversing mechanism with a pure mechanical structure is used to realize the reversing of the main reversing valve. When the stroke of the piston head reaches the maximum, the pilot reversing valve in the reversing mechanism is triggered to reverse, and then the main reversing valve is reversed, causing the piston head to move in the reverse direction. When the piston head moves in the reverse direction to the maximum stroke, the reversing mechanism is triggered again, and the piston head runs in the reverse direction again. By repeating the above steps, the continuous operation of the pump is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the principle of the oil and gas bidirectional circulation pump of the present utility model;

[0024] Figure 2 is a schematic diagram of the overall structure of the oil and gas bidirectional circulation pump of the present utility model;

[0025] Figure 3 is a schematic diagram of the internal structure of the oil and gas bidirectional circulation pump of the present utility model;

[0026] In the figure: 1, cylinder barrel; 11, intermediate cylinder; 12, working chamber cylinder; 13, end plate; 2, partition plate; 3, piston assembly; 31, piston head; 32, piston rod; 4, driving medium pipeline; 41, main driving medium pipe; 42, main reversing valve; 43, driving medium pipe; 5, driven medium pipeline; 51, inlet pipe; 52, discharge pipe; 53, driving pipe; 54, check valve; 6, pilot reversing valve; 61, valve core; 7, driving mechanism; 71, sliding sleeve; 711, boss; 712, chute; 72, driving retaining ring; 81, pipeline; 82, control pipeline; 9, ball valve; 10, mounting bracket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model, that is, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Usually, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] The following will further describe the present utility model with reference to the accompanying drawings, but the protection scope of the present utility model is not limited to the following.

[0029] AsFigures 1-3 As shown in the figure, an oil-gas two-way circulation pump includes:

[0030] A cylinder barrel 1, in which two partition plates 2 are fixedly arranged at intervals. The two partition plates 2 divide the inside of the cylinder barrel 1 into two working chambers and an intermediate chamber. The two working chambers are respectively located at both ends of the intermediate chamber;

[0031] A piston assembly 3, which includes a piston rod 32 and two piston heads 31. The two piston heads 31 are respectively slidably arranged in the two working chambers. Both ends of the piston rod 32 penetrate through the two partition plates 2 and are respectively connected to the two piston heads 31;

[0032] A driving medium pipeline 4, which includes a main driving medium pipe 41, a main reversing valve 42 and driving medium pipes 43. The main driving medium pipe 41 is used to input the driving medium. The main driving medium pipe 41 is connected to the main reversing valve 42. One ends of the two driving medium pipes 43 are respectively connected to both ends of the cylinder barrel 1 and communicate with the two working chambers, and the other ends are both connected to the main reversing valve 42;

[0033] A driven medium pipeline 5, which includes an inlet pipe 51, an outlet pipe 52 and a driving pipe 53. The driving pipe 53 is connected to the partition plate 2 and communicates with the working chamber. The inlet pipe 51 and the outlet pipe 52 are both connected to the driving pipe 53. Check valves 54 are arranged on both the inlet pipe 51 and the outlet pipe 52;

[0034] A reversing mechanism, which is arranged in the intermediate chamber. The power input end of the reversing mechanism is connected to the piston rod 32, and the power output end of the reversing mechanism is connected to the main reversing valve 42.

[0035] Specifically, in this embodiment, the medium in the driving medium pipeline 4 is oil. In some other embodiments, the medium in the driving medium pipeline 4 can also be gas; in this embodiment, the medium in the driven medium pipeline 5 is oil. In some other embodiments, the medium in the driven medium pipeline 5 can also be gas.

[0036] In this embodiment, two driving pipes 53 are provided, and the two driving pipes 53 are respectively connected to the two working chambers;

[0037] When the pump works, the piston head 31 divides the working chamber into two parts. One part contains the driving medium, and the other part contains the driven medium. When the driving medium enters the working chamber, it pushes the piston head 31 to move, so that the driven medium on the other side of the piston head 31 in the working chamber is discharged through the driving pipe 53.

[0038] In this embodiment, the one-way valve 54 on the inlet pipe 51 opens unidirectionally towards the direction in which the driven medium enters, and the one-way valve 54 on the discharge pipe 52 opens unidirectionally towards the direction in which the driven medium is discharged. When the driven medium is discharged from the drive pipe 53, the one-way valve 54 on the discharge pipe 52 opens, and the one-way valve 54 on the inlet pipe 51 closes, and the driven medium is discharged from the discharge pipe 52.

[0039] When the drive medium is discharged from the working chamber, the piston head 31 moves towards the side of the drive medium. At this time, the one-way valve 54 on the inlet pipe 51 opens, and the one-way valve 54 on the discharge pipe 52 closes. The driven medium enters the drive pipe 53 from the inlet pipe 51 and then enters the working chamber.

[0040] Since there are two working chambers and two drive pipes 53 in this embodiment, and the two piston heads 31 are connected to both ends of a piston rod 32, therefore, when one working chamber is pumping out the driven medium, the other working chamber is filling with the driven medium, and the above working process is cycled, so that the driven medium can be continuously pumped out.

[0041] Through the commutation mechanism, during the operation of the piston head 31, the piston rod 32 drives the commutation mechanism, and the commutation mechanism commutates the main commutation valve 42. Specifically, when one working chamber is filled with the drive medium, the drive medium in the other working chamber is completely discharged. At this time, the stroke of the piston head 31 reaches the maximum, and the piston rod 32 triggers the commutation mechanism. The commutation mechanism commutates the main commutation valve 42, and the main commutation valve 42 controls the drive medium to enter the working chamber that has been completely discharged of the drive medium before, so that the piston head 31 moves in the reverse direction.

[0042] Through the above working process, as long as the main drive medium pipe 41 is externally connected to a drive medium source with pressure, the pump can operate independently and drive the driven medium to be transmitted in the driven medium pipeline 5. The pressure energy of the high-pressure oil and gas resources can be fully utilized to achieve the purpose of energy conversion.

[0043] Preferably, the commutation mechanism includes a pilot commutation valve 6 and a drive mechanism 7, and the main commutation valve 42 includes a pneumatic commutation valve or a hydraulic commutation valve;

[0044] The pilot commutation valve 6 is connected to the main drive medium pipe 41 through a pipeline 81. The pilot commutation valve 6 is connected to the main commutation valve 42 through a control pipeline 82 to control the commutation of the commutation valve. The valve core 61 of the pilot commutation valve 6 is connected to the piston rod 32 through the drive mechanism 7.

[0045] In this embodiment, the commutation mechanism is a pure mechanical structure without electronic components, enabling the pump to operate under harsh conditions. The main commutation valve 42 in this embodiment is a hydraulic commutation valve, and the pilot commutation valve 6 operates by using the drive medium in the main drive medium pipe 41. When the stroke of the piston head 31 reaches the maximum, the piston rod 32 drives the valve core 61 of the pilot commutation valve 6 to move through the drive mechanism 7, causing the pilot commutation valve 6 to commutate. The drive medium enters or exits the control end of the main commutation valve 42 through the control pipeline 82, causing the main commutation valve 42 to commutate, and further enabling the piston head 31 to reciprocate and continue to work.

[0046] Preferably, the drive mechanism 7 includes a sliding sleeve 71 and a drive retaining ring 72; annular bosses 711 are provided at both ends inside the sliding sleeve 71, and the sliding sleeve 71 is slidably connected to the piston rod 32 through the bosses 711;

[0047] The drive retaining ring 72 is fixedly arranged on the piston rod 32, and the drive retaining ring 72 is located between the two bosses 711 inside the sliding sleeve 71;

[0048] A connection structure for connecting the valve core 61 of the pilot commutation valve 6 is arranged on the outer surface of the sliding sleeve 71.

[0049] By arranging the sliding sleeve 71, the piston rod 32 and the sliding sleeve 71 can slide relative to each other. Furthermore, the piston rod 32 drives the sliding sleeve 71 to move through the drive retaining ring 72 only when the position of the piston is close to the end of the stroke, avoiding triggering the commutation mechanism when the piston rod 32 is in the middle position.

[0050] Preferably, the connection structure includes a chute 712, the chute 712 is arranged on the outer surface of the sliding sleeve 71 along the length direction of the sliding sleeve 71, and the valve core 61 of the pilot commutation valve 6 is slidably connected to the chute 712. By arranging the chute 712, the sliding sleeve 71 and the valve core 61 of the pilot commutation valve 6 can slide relative to each other. When the position of the piston head 31 reaches a position close to the end of the stroke, the drive retaining ring 72 on the piston rod 32 first contacts the boss 711 at the end of the sliding sleeve 71, driving the sliding sleeve 71 to move. Due to the existence of the chute 712, at this time, the sliding sleeve 71 and the valve core 61 slide relative to each other. When the end of the chute 712 abuts against the valve core 61, the valve core 61 is then driven to move. Through the sliding between the sliding sleeve 71 and the piston rod 32 and the sliding between the sliding sleeve 71 and the valve core 61, the commutation process is made stable, avoiding a large impact on the pump and prolonging the service life of the pump.

[0051] Preferably, the cylinder block 1 includes an intermediate cylinder 11, a working chamber cylinder 12 and end plates 13. The intermediate chamber is arranged inside the intermediate cylinder 11. The two working chamber cylinders 12 are respectively arranged at both ends of the intermediate cylinder 11. The partition plate 2 is clamped by the intermediate cylinder 11 and the working chamber cylinder 12. The end plates 13 are arranged at the ends of the working chamber cylinders 12. A working chamber is formed among the end plates 13, the working chamber cylinders 12 and the partition plate 2. By setting the cylinder block 1 as a split structure, the pump can be separated into multiple components when disassembled, which is convenient for maintenance.

[0052] Preferably, the edge of the end plate 13 protrudes from the working chamber cylinder 12, and the edge of the end plate 13 is connected to the intermediate cylinder 11 by bolts. By directly connecting the end plate 13 to the working chamber cylinder 12 with bolts, when installing and disassembling the pump, only the end plate 13 needs to be removed to completely disassemble the pump, which is convenient for maintenance.

[0053] Preferably, an installation bracket 10 for installation is arranged on the cylinder block 1. In this embodiment, the installation bracket 10 is arranged on the intermediate cylinder 11. Through the installation bracket 10, it is convenient to install and fix the pump.

[0054] Preferably, a ball valve 9 is arranged on the drive medium pipe 43. Through the ball valve 9, the on-off of the drive medium pipeline 4 is controlled to control the start and stop of the pump.

[0055] The above is only the preferred embodiment of the present invention, and does not impose any form of limitation on the present invention. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention by using the above technical content without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, all changes, modifications, equivalent changes and modifications made to the above embodiments according to the technology of the present invention without departing from the content of the technical solution of the present invention belong to the protection scope of this technical solution.

Claims

1. An oil and gas bi-directional circulation pump, characterized in that, Comprising: A cylinder barrel (1), in which two partitions (2) are fixedly arranged at intervals. The two partitions (2) divide the interior of the cylinder barrel (1) into two working chambers and an intermediate chamber. The two working chambers are respectively located at both ends of the intermediate chamber; A piston assembly (3), which includes a piston rod (32) and two piston heads (31). The two piston heads (31) are respectively slidably arranged in the two working chambers. Both ends of the piston rod (32) penetrate through the two partitions (2) and are respectively connected to the two piston heads (31); A driving medium pipeline (4), which includes a main driving medium pipe (41), a main reversing valve (42) and driving medium pipes (43). The main driving medium pipe (41) is used for inputting the driving medium. The main driving medium pipe (41) is communicated with the main reversing valve (42). One ends of the two driving medium pipes (43) are respectively connected to both ends of the cylinder barrel (1) and communicated with the two working chambers, and the other ends are both communicated with the main reversing valve (42); A driven medium pipeline (5), which includes an inlet pipe (51), an outlet pipe (52) and a driving pipe (53). The driving pipe (53) is connected to the partition (2) and communicated with the working chamber. The inlet pipe (51) and the outlet pipe (52) are both communicated with the driving pipe (53). Check valves (54) are arranged on both the inlet pipe (51) and the outlet pipe (52); A reversing mechanism, which is arranged in the intermediate chamber. The power input end of the reversing mechanism is connected to the piston rod (32), and the power output end of the reversing mechanism is connected to the main reversing valve (42).

2. The oil and gas bi-directional circulation pump according to claim 1, characterized in that, The reversing mechanism includes a pilot reversing valve (6) and a driving mechanism (7). The main reversing valve (42) includes a pneumatic reversing valve or a hydraulic reversing valve; The pilot reversing valve (6) is communicated with the main driving medium pipe (41) through a pipeline (81). The pilot reversing valve (6) is communicated with the main reversing valve (42) through a control pipeline (82) to control the reversing of the reversing valve. The valve core (61) of the pilot reversing valve (6) is connected to the piston rod (32) through the driving mechanism (7).

3. The oil and gas bi-directional circulation pump according to claim 2, wherein The driving mechanism (7) includes a sliding sleeve (71) and a driving retaining ring (72); annular bosses (711) are arranged at both ends inside the sliding sleeve (71). The sliding sleeve (71) is slidably connected to the piston rod (32) through the bosses (711); the driving retaining ring (72) is fixedly arranged on the piston rod (32), and the driving retaining ring (72) is located between the two bosses (711) inside the sliding sleeve (71); A connecting structure for connecting the valve core (61) of the pilot reversing valve (6) is arranged on the outer surface of the sliding sleeve (71).

4. The oil-gas two-way circulation pump according to claim 3, characterized in that, The connecting structure includes a chute (712), which is arranged on the outer surface of the sliding sleeve (71) along the length direction of the sliding sleeve (71). The valve core (61) of the pilot reversing valve (6) is slidably connected to the chute (712).

5. The oil and gas bi-directional circulation pump according to claim 1, wherein The cylinder barrel (1) includes an intermediate barrel (11), a working chamber barrel (12) and end plates (13). The intermediate chamber is arranged inside the intermediate barrel (11). The two working chamber barrels (12) are respectively arranged at both ends of the intermediate barrel (11). The partition plate (2) is clamped by the intermediate barrel (11) and the working chamber barrel (12). The end plates (13) are arranged at the ends of the working chamber barrels (12). A working chamber is formed among the end plates (13), the working chamber barrels (12) and the partition plate (2).

6. The oil-gas two-way circulation pump according to claim 5, characterized in that, The edge of the end plate (13) protrudes from the working chamber barrel (12), and the edge of the end plate (13) is connected to the intermediate barrel (11) by bolts.

7. The oil-gas two-way circulation pump according to claim 1, wherein An installation bracket (10) is arranged on the cylinder barrel (1).

8. The oil and gas bi-directional circulation pump according to claim 1, wherein A ball valve (9) is arranged on the drive medium pipe (43).

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