Plunger sealing and lubricating system of plunger pump

Abstract

The utility model relates to the technical field of jet pump plunger sealing, lubricating and cooling, in particular to a plunger pump plunger sealing and lubricating system. The utility model provides a plunger sealing and lubricating system of a plunger pump, which can filter lubricating oil, ensure the lubricating effect, close an oil inlet piece and stop the lubricating oil from entering in time. A plunger sealing and lubricating system of a plunger pump comprises an oil inlet piece, a culvert body, a front guide sleeve pressing cap and the like, the lower side of the oil inlet piece is connected with the culvert body, and the front guide sleeve pressing cap is connected into the culvert body. When lubricating oil enters the connecting pipe, the detachable filter screen filters impurities in the lubricating oil, and when the lubricating oil needs to be stopped from entering the oil inlet piece, the electromagnetic valve is closed, so that the effects that the lubricating oil can be filtered, the lubricating effect is ensured, the oil inlet piece can be closed, and the lubricating oil can be stopped from entering in time are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of jet pump plunger seal lubrication and cooling, in particular to a plunger seal lubrication system for a plunger pump. Background Technique

[0002] The jet pump process technology is a process technology for drainage production of coalbed methane wells in coalbed methane fields. It uses high-pressure water as the power fluid to drive the downhole drainage (coal powder) gas production device to work. The high-pressure liquid provided by the surface plunger pump converts its potential energy into the kinetic energy of a high-speed flow beam through the jet pump nozzle, forming a low-pressure area at the suction port. The downhole fluid is sucked in and mixed with the power fluid, and the kinetic energy of the power fluid is transferred to the downhole fluid in the diffuser tube to increase its pressure and discharge it to the ground. Therefore, the safe and stable operation of the plunger pump directly affects the continuous drainage production of coalbed methane wells.

[0003] For the existing plunger pump, during use, the lubricating oil in the fuel tank enters the pump body through the inlet pipe, and then flows back to the fuel tank from the pump body through the outlet pipe, so that the lubricating oil is recycled to lubricate the plunger. However, since impurities may appear in the lubricating oil, the lubrication effect is affected, and the lubricating oil is controlled by an oil pump for transportation. When it is necessary to stop the transportation, it may be difficult to stop the lubricating oil from entering the pump body in time, which is rather inconvenient.

[0004] Therefore, a plunger pump plunger seal lubrication system has now been developed, which can filter the lubricating oil to ensure the lubrication effect, and at the same time can close the oil inlet part to stop the lubricating oil from entering in time. Content of the Utility Model

[0005] In order to overcome the disadvantages that impurities may appear in the lubricating oil, resulting in affecting the lubrication effect, and the lubricating oil is controlled by an oil pump for transportation. When it is necessary to stop the transportation, it may be difficult to stop the lubricating oil from entering the pump body in time, which is rather inconvenient. The utility model provides a plunger pump plunger seal lubrication system that can filter the lubricating oil to ensure the lubrication effect, and at the same time can close the oil inlet part to stop the lubricating oil from entering in time.

[0006] The technical solution is as follows: A plunger pump plunger seal lubrication system includes an oil inlet part, a culvert body, a front guide sleeve pressing cap, an oil return part, a plunger, a connecting pipe, an electromagnetic valve, and a detachable filter screen. The lower side of the oil inlet part is connected to the culvert body, the inside of the culvert body is connected to the front guide sleeve pressing cap, the lower part of the culvert body is connected to the oil return part, both the oil return part and the oil inlet part pass through the front guide sleeve pressing cap, the plunger is slidably connected inside the front guide sleeve pressing cap, the upper side of the oil inlet part is connected to the connecting pipe, the electromagnetic valve is connected to the middle of the connecting pipe, and the detachable filter screen is clamped on the upper side of the connecting pipe.

[0007] Preferably, it further includes a V-shaped packing. The right part of the plunger is sleeved with the V-shaped packing, and the V-shaped packing contacts the front guide sleeve pressing cap.

[0008] Preferably, an oil seal is further included. The left part of the front guide sleeve compression cap is connected with the oil seal, and the oil seal contacts with the plunger.

[0009] Preferably, the V-shaped packing is a rubber fluororubber polyurethane V-shaped combined sealing ring.

[0010] Preferably, the V-shaped combined sealing ring is composed of a bottom ring, a sealing ring and a pressing ring.

[0011] Preferably, the tightness of the front guide sleeve compression cap can be adjusted to adjust the sealing effect.

[0012] The beneficial effects of the present utility model are as follows: 1. When the lubricating oil enters the connecting pipe, the detachable filter screen filters the impurities in the lubricating oil. When it is necessary to stop the lubricating oil from entering the oil inlet part, the solenoid valve is closed, achieving the effect of being able to filter the lubricating oil, ensuring the lubricating effect, and at the same time being able to close the oil inlet part to stop the lubricating oil from entering in time.

[0013] 2. The present utility model provides power through an oil pump to transport the oil in the fuel tank to the oil inlet part of the culvert body, so that the lubricating oil enters the front guide sleeve compression cap and soaks the plunger, lubricating and cooling the plunger. Then the lubricating oil returns to the fuel tank through the oil return part of the culvert body and the pipeline, achieving the effect of being able to lubricate and cool the plunger and the sealing device in time and reducing the wear during operation. Description of the Drawings

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model.

[0015] Figure 2 It is a structural schematic diagram of the present utility model.

[0016] Figure 3 It is a three-dimensional sectional structural schematic diagram of the present utility model.

[0017] Figure 4 It is a partial three-dimensional sectional structural schematic diagram of the present utility model.

[0018] Description of the reference numerals: 1 - oil inlet part, 2 - culvert body, 3 - front guide sleeve compression cap, 4 - oil return part, 5 - V-shaped packing, 6 - plunger, 7 - oil seal, 8 - connecting pipe, 9 - solenoid valve, 10 - detachable filter screen. Detailed Description of the Preferred Embodiments

[0019] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0020] A plunger seal lubrication system for a plunger pump, as Figures 1 - 4As shown in the figure, it includes an oil inlet part 1, a culvert body 2, a front guide sleeve compression nut 3, an oil return part 4, a V-shaped packing 5, a plunger 6, an oil seal 7, a connecting pipe 8, a solenoid valve 9 and a detachable filter screen 10. The lower side of the oil inlet part 1 is connected to the culvert body 2. The inside of the culvert body 2 is connected to the front guide sleeve compression nut 3. The lower part of the culvert body 2 is connected to the oil return part 4. Both the oil return part 4 and the oil inlet part 1 pass through the front guide sleeve compression nut 3. The inside of the front guide sleeve compression nut 3 is slidably connected to the plunger 6. The right part of the plunger 6 is sleeved with the V-shaped packing 5. The V-shaped packing 5 contacts the front guide sleeve compression nut 3. The left part of the front guide sleeve compression nut 3 is connected to the oil seal 7. The oil seal 7 contacts the plunger 6. The V-shaped packing 5 is a rubber fluororubber polyurethane V-shaped combined sealing ring. The V-shaped combined sealing ring is composed of a bottom ring, a sealing ring and a pressing ring. The front guide sleeve compression nut 3 can adjust the tightness to adjust the sealing effect. The upper side of the oil inlet part 1 is connected to the connecting pipe 8. The middle part of the connecting pipe 8 is connected to the solenoid valve 9. The upper side of the connecting pipe 8 is clamped with the detachable filter screen 10.

[0021] When using the present utility model, first install the culvert body 2 on the plunger pump. When the plunger pump operates to drive the plunger 6 to reciprocate, connect the connecting pipe 8 on the oil inlet part 1 and the oil return part 4 to the fuel tank. Provide power through the oil pump to transport the oil in the fuel tank to the oil inlet part 1 on the culvert body 2, so that the lubricating oil enters the front guide sleeve compression nut 3 to soak the plunger 6, lubricate and cool the plunger 6, reduce the wear of the plunger 6 on the V-shaped packing 5 sealing ring, and extend the service life of the sealing ring. Then the lubricating oil returns to the fuel tank through the oil return part 4 at the lower part of the culvert body 2 and the pipeline for recycling without causing environmental pollution. Thus, it plays a role in being able to lubricate and cool the plunger 6 and the sealing device in time and reduce the wear during operation. The V-shaped packing 5 is used to seal the plunger 6 to ensure that the lubricating oil is always inside the plunger 6. When the lubricating oil enters the connecting pipe 8, the detachable filter screen 10 filters the impurities in the lubricating oil. When it is necessary to stop the lubricating oil from entering the oil inlet part 1, the solenoid valve 9 can be closed. Thus, it plays a role in being able to filter the lubricating oil to ensure the lubrication effect and at the same time be able to close the oil inlet part 1 to stop the lubricating oil from entering in time.

[0022] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. All equivalent structural or equivalent process transformations made by using the content of the specification of the present utility model, or directly or indirectly applied in other related technical fields, are equally included in the patent protection scope of the present utility model.

Claims

1. A plunger seal lubrication system for a plunger pump, characterized in that, It includes an oil inlet part (1), a housing (2), a front guide sleeve compression nut (3), an oil return part (4), a plunger (6), a connecting pipe (8), a solenoid valve (9) and a detachable filter screen (10). The lower side of the oil inlet part (1) is connected to the housing (2), the inside of the housing (2) is connected to the front guide sleeve compression nut (3), the lower part of the housing (2) is connected to the oil return part (4), both the oil return part (4) and the oil inlet part (1) pass through the front guide sleeve compression nut (3), the inside of the front guide sleeve compression nut (3) is slidably connected to the plunger (6), the upper side of the oil inlet part (1) is connected to the connecting pipe (8), the middle part of the connecting pipe (8) is connected to the solenoid valve (9), and the upper side of the connecting pipe (8) is snap-connected with the detachable filter screen (10).

2. The plunger seal lubrication system of a plunger pump according to claim 1, characterized in that, It further includes a V-shaped packing (5), the right part of the plunger (6) is sleeved with the V-shaped packing (5), and the V-shaped packing (5) contacts with the front guide sleeve compression nut (3).

3. A plunger seal lubrication system for a plunger pump according to claim 2, characterized in that, It further includes an oil seal (7), the left part of the front guide sleeve compression nut (3) is connected to the oil seal (7), and the oil seal (7) contacts with the plunger (6).

4. A plunger seal lubrication system for a plunger pump according to claim 3, characterized in that, The V-shaped packing (5) is a rubber fluororubber polyurethane V-shaped combined sealing ring.

5. A plunger seal lubrication system for a plunger pump according to claim 4, characterized in that, The V-shaped combined sealing ring is composed of a bottom ring, a sealing ring and a pressing ring.

6. A plunger seal lubrication system for a plunger pump according to claim 5, characterized in that, The front guide sleeve compression nut (3) can adjust the tightness to adjust the sealing effect.

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