Piston cylinder assembly and oil well associated gas recovery device

Abstract

The utility model relates to the technical field of piston air cylinder assemblies, in particular to a piston air cylinder assembly and an oil well associated gas recovery device, which comprise a piston rod connected with a connecting cylinder, the piston air cylinder assembly comprises a bottom plate and a base plate, the bottom plate is connected with an upper sealing ring and a lower sealing ring through a connecting rod, and the base plate is connected with a heat conduction ring. The heat conduction ring is connected with the upper sealing ring and the lower sealing ring. The base plate is connected with the piston rod through the radiating pipe. The piston air cylinder has the advantages that when the piston air cylinder works, heat generated by the upper sealing ring and the lower sealing ring can be transmitted into the base plate through the heat conduction ring, cooling and heat dissipation are carried out through the heat dissipation pipe, meanwhile, the upper sealing ring and the lower sealing ring are fixed by the connecting rod while being connected in a sleeved mode, and therefore the upper sealing ring and the lower sealing ring are not prone to falling off. The device is overall stable and high in sealing performance.

Description

A piston cylinder assembly and an associated gas recovery device for oil wells Technical Field

[0001] This utility model relates to the technical field of piston cylinder components, specifically a piston cylinder assembly and an oil well associated gas recovery device. Background Technology

[0002] Oil well associated gas recovery devices typically include a compression cylinder, which compresses the associated gas for recovery and storage. The cylinder is usually a piston cylinder, and the piston cylinder mainly relies on the piston assembly to work and compress the gas during operation. In other words, the piston is an important component of the piston cylinder.

[0003] Chinese patent CN214999349U discloses a piston assembly with an easily replaceable sealing ring, relating to the field of piston technology. The piston assembly includes: a piston head, the rear end of which is connected to a piston rod; the piston head, from rear to front, includes: a base plate, a boss, and a locking post; a sealing ring, which is sleeved on the boss; and a locking member, which engages with the locking post, clamping and fixing the sealing ring in conjunction with the base plate. In this invention, during the installation of the sealing ring, the sealing ring is sleeved on the boss, and the locking member and locking post press and fix the sealing ring to the base plate, effectively preventing deformation or damage caused by uneven force on the sealing ring during installation, and making replacement easy and efficient.

[0004] However, in the aforementioned patent, when the cylinder starts working, its sealing ring and piston assembly will continuously move and rub against each other. During this process, the piston will generate a lot of heat. Since its sealing ring is only fitted and fixed, it is easy for the sealing ring to loosen or even fall off due to high temperature, which will affect the internal airtightness. Summary of the Invention

[0005] The purpose of this invention is to provide a piston cylinder assembly and an oil well associated gas recovery device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a piston cylinder assembly, including a piston rod connected to a connecting cylinder, the piston cylinder assembly including: a base plate and a pad plate, the base plate being connected to an upper sealing ring and a lower sealing ring via a connecting rod, the pad plate being connected to a heat-conducting ring, the heat-conducting ring being connected to the upper sealing ring and the lower sealing ring, and the pad plate being connected to the piston rod via a heat dissipation pipe.

[0007] Preferably, a piston rod is fixedly connected to the lower side of the connecting cylinder, a connecting plate is fixedly connected to the lower end of the piston rod, a plurality of plug-in parts are fixedly connected to the side of the connecting plate, and two mounting holes are opened at the lower end of the connecting plate, the mounting holes penetrating the piston rod.

[0008] Preferably, the inner side of the upper sealing ring is provided with a plurality of slots, the lower end of the upper sealing ring is provided with a connecting groove, the inner side of the upper sealing ring is in close contact with the side of the connecting plate, and the surface of the plug is inserted into the inner wall of the slot.

[0009] Preferably, the upper end of the lower sealing ring is provided with a connecting groove, the lower end of the lower sealing ring is in close contact with the base plate, and the surfaces of both the upper and lower sealing rings are provided with a plurality of connecting holes.

[0010] Preferably, both the upper and lower ends of the pad are fixedly connected to heat-conducting rings, which are inserted into the connecting grooves. The surface of the pad has several through-holes, and a heat dissipation pipe is fixedly connected inside the pad. The two ends of the heat dissipation pipe pass through the upper end of the pad, through the mounting holes, and finally out of the surface of the connecting cylinder.

[0011] Preferably, the upper end of the base plate is fixedly connected to a plurality of connecting rods, the upper ends of the plurality of connecting rods passing through the connecting holes of the lower sealing ring, the pad and the upper sealing ring in sequence, and the surface of the plurality of connecting rods is fitted with the same connecting ring, and the two ends of the connecting ring are welded to each other.

[0012] Preferably, an oil well associated gas recovery device includes the piston cylinder assembly described above.

[0013] Compared with the prior art, the beneficial effects of this utility model are: when the piston cylinder is working, the heat generated by the upper sealing ring and the lower sealing ring will be transferred to the pad through the heat conduction ring and cooled and dissipated through the heat dissipation pipe. At the same time, the upper sealing ring and the lower sealing ring are fixed by the connecting rod while they are sleeved, making them less likely to fall off. The device is stable as a whole and has high sealing performance. Attached Figure Description

[0014] Figure 1 is a three-dimensional schematic diagram of the overall structure of this utility model;

[0015] Figure 2 is an exploded view of the overall structure of this utility model;

[0016] Figure 3 is a cross-sectional schematic diagram of the pad of this utility model;

[0017] Figure 4 is a bottom view of the piston rod of this utility model.

[0018] In the diagram: 1. Piston rod; 2. Connecting disc; 3. Insert connector; 4. Upper sealing ring; 5. Lower sealing ring; 6. Gasket; 7. Heat-conducting ring; 8. Base plate; 9. Connecting rod; 10. Slot; 11. Connecting hole; 12. Heat dissipation pipe; 13. Connecting groove; 14. Mounting hole; 15. Connecting cylinder; 16. Connecting ring. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] Please refer to Figures 1-4. This utility model provides a technical solution: a piston cylinder assembly, including a piston rod 1 connected to a connecting cylinder 15. The piston cylinder assembly includes a base plate 8 and a pad 6. The piston rod 1 is fixedly connected to the lower side of the connecting cylinder 15. The connecting cylinder 15 can be connected to components such as a crankshaft connecting rod inside the cylinder. The piston rod 1 can transmit power. A connecting plate 2 is fixedly connected to the lower end of the piston rod 1. Several plug-in parts 3 are fixedly connected to the side of the connecting plate 2. The connecting plate 2 can be connected to the upper cylinder through the plug-in parts 3. The sealing ring 4 is connected, and the lower end of the connecting plate 2 has two mounting holes 14. The mounting holes 14 pass through the piston rod 1 and the heat dissipation pipe 12 can be connected through the mounting holes 14 to dissipate heat from the whole. Several slots 10 are provided on the inner side of the upper sealing ring 4, and a connecting groove 13 is provided at the lower end of the upper sealing ring 4. The inner side of the upper sealing ring 4 is in close contact with the side of the connecting plate 2. At this time, the upper sealing ring 4 is initially fixed by the connecting plate 2. The surface of the plug 3 is inserted into the inner wall of the slot 10, and disassembly is convenient through the plug.

[0021] The device is connected to the cylinder via the connecting cylinder 15, thus forming an integral part of the cylinder and serving as one of the working components of the cylinder.

[0022] The upper end of the lower sealing ring 5 is provided with a connecting groove 13, and the lower end of the lower sealing ring 5 is in close contact with the base plate 8. The base plate 8 acts as a bearing device to limit the position of the lower sealing ring 5. Several connecting holes 11 are provided on the surfaces of both the upper sealing ring 4 and the lower sealing ring 5. Heat-conducting rings 7 are fixedly connected to both the upper and lower ends of the pad 6. The heat-conducting rings 7 facilitate the transfer of the absorbed heat to the pad 6. The heat-conducting rings 7 are inserted into the connecting groove 13. Several through connecting holes 11 are provided on the surface of the pad 6. A heat dissipation pipe 12 is fixedly connected inside the pad 6. When heat is transferred to the pad 6, the heat dissipation pipe 12 can dissipate heat through the internal flowing coolant. For heat dissipation and cooling, the two ends of the heat dissipation pipe 12 pass through the upper end of the pad 6 and through the mounting hole 14, and finally exit through the surface of the connecting cylinder 15. When the coolant flows in the heat dissipation pipe 12, it can also cool the piston rod 1, thereby increasing the stress. Several connecting rods 9 are fixedly connected to the upper end of the base plate 8. The upper ends of the several connecting rods 9 pass through the connecting holes 11 of the lower sealing ring 5, the pad 6 and the upper sealing ring 4 in sequence. The connecting rods 9 can fix and limit the entire device. The surface of the several connecting rods 9 is fitted with the same connecting ring 16. The two ends of the connecting ring 16 are welded to each other to prevent the connecting ring 16 from coming off the connecting rod 9.

[0023] The upper sealing ring 4 and the lower sealing ring 5 are simultaneously fixed by the connecting rod 9, thereby improving the overall stability. At the same time, when the upper sealing ring 4 and the lower sealing ring 5 generate heat during operation, the heat will be transferred to the pad 6 through the heat conduction ring 7 and cooled and dissipated through the heat dissipation pipe 12, thereby preventing the upper sealing ring 4 and the lower sealing ring 5 from loosening due to high temperature.

[0024] An oil well associated gas recovery device includes the aforementioned piston cylinder assembly.

[0025] In actual use, after checking that the device is correct, install the components in sequence. Fix the position of the connecting hole 11 with the connecting rod 9, fix the position of the connecting rod 9 with the connecting ring 16, and finally rotate the connecting plate 2 to insert the plug 3 into the slot 10 to complete the installation. When the cylinder is working, the heat generated by the upper sealing ring 4 and the lower sealing ring 5 will be dissipated by the heat conduction ring 7 and the heat dissipation pipe 12, thereby avoiding the situation of falling off and loosening after high temperature. The overall sealing performance is high and the working temperature is low.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A piston cylinder assembly, comprising a piston rod (1) connected to a connecting cylinder (15), characterized in that: The piston cylinder assembly includes a base plate (8) and a pad plate (6). The base plate (8) is connected to an upper sealing ring (4) and a lower sealing ring (5) via a connecting rod (9). The pad plate (6) is connected to a heat-conducting ring (7), which is connected to the upper sealing ring (4) and the lower sealing ring (5). The pad plate (6) is connected to the piston rod (1) via a heat dissipation pipe (12).

2. The piston cylinder assembly according to claim 1, characterized in that: A piston rod (1) is fixedly connected to the lower side of the connecting cylinder (15), and a connecting plate (2) is fixedly connected to the lower end of the piston rod (1). Several plug-in parts (3) are fixedly connected to the side of the connecting plate (2). Two mounting holes (14) are opened at the lower end of the connecting plate (2), and the mounting holes (14) pass through the piston rod (1).

3. A piston cylinder assembly according to claim 2, characterized in that: The upper sealing ring (4) has several slots (10) on its inner side, and a connecting groove (13) is provided at the lower end of the upper sealing ring (4). The inner side of the upper sealing ring (4) is in close contact with the side of the connecting plate (2), and the surface of the plug (3) is inserted into the inner wall of the slot (10).

4. A piston cylinder assembly according to claim 3, characterized in that: The upper end of the lower sealing ring (5) is provided with a connecting groove (13), and the lower end of the lower sealing ring (5) is in close contact with the base plate (8). The surfaces of the upper sealing ring (4) and the lower sealing ring (5) are provided with several connecting holes (11).

5. A piston cylinder assembly according to claim 4, characterized in that: The upper and lower ends of the pad (6) are fixedly connected to heat-conducting rings (7), which are inserted into the connecting groove (13). The surface of the pad (6) is provided with several through connecting holes (11). The inside of the pad (6) is fixedly connected to a heat dissipation pipe (12). The two ends of the heat dissipation pipe (12) pass through the upper end of the pad (6), through the mounting hole (14), and finally out through the surface of the connecting cylinder (15).

6. A piston cylinder assembly according to claim 5, characterized in that: The upper end of the base plate (8) is fixedly connected to several connecting rods (9). The upper ends of the several connecting rods (9) pass through the connecting holes (11) of the lower sealing ring (5), the pad (6) and the upper sealing ring (4) in sequence. The surface of the several connecting rods (9) is fitted with the same connecting ring (16), and the two ends of the connecting ring (16) are welded to each other.

7. A device for recovering associated gas from oil wells, characterized in that: Includes the piston cylinder assembly described in any one of claims 1-6.

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