Spiral reciprocating driving tank top volatile gas recycling and conveying device

Abstract

The utility model belongs to the technical field of oil field fluid oil gas recycling and conveying, and discloses a spiral reciprocating driving tank top volatile gas recycling and conveying device which comprises a base, a pressurizing device is arranged on one side of the base, the power input end of the pressurizing device is fixedly connected with a power device, and the outer wall of the pressurizing device is communicated with a conveying pipe set. A control cabinet is fixedly mounted on the base close to the power device; the storage tank volatile gas recycling and pressurizing device is simple in overall structure, the storage tank volatile gas can be recycled and pressurized, the storage tank volatile gas is directly recycled and conveyed to a centralized treatment point before being treated, the decentralized treatment cost is saved, the volatile gas does not enter a pressurizing device, the pressurizing device is not damaged, the service life is prolonged, and the using effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil field fluid oil and gas recovery and transportation, and specifically relates to a spiral reciprocating driven tank top volatile gas recovery and transportation device. Background Art

[0002] In the petroleum and chemical industries, oil storage tanks are indispensable facilities that are used to store large amounts of oil products. However, during operation, oil storage tanks produce a large amount of volatile gases, which not only contain valuable hydrocarbon resources, but may also pollute the environment. Therefore, how to efficiently recover and treat these volatile gases has become a focus of the industry.

[0003] The volatile gas from the tank is a multiphase medium gas with complex components. Its main component is alkane gas, which contains multiphase medium such as water, hydrocarbons, and impurities. Its direct emission not only pollutes the atmosphere and violates the national requirements for environmental governance, but also wastes resources. Therefore, the recovery of the volatile gas on the top of the tank is not only to protect the environment, but also an important means to save energy and improve economic benefits. Due to the low pressure of the volatile gas, direct treatment is not only complicated in process, but also difficult to achieve technical indicators, and cannot meet the requirements of conventional compressors for conveying gas.

[0004] In the existing technology, compressor equipment is the main conveying machinery for flammable gas in oil fields. There are two main types of compressors: centrifugal and positive displacement. The commonly used ones are reciprocating, screw pump (single screw pump, twin screw pump), cam type, etc.

[0005] Centrifugal and cam compressors are mainly used for vacuuming gases, and their discharge pressure is low, which cannot meet the transportation requirements; reciprocating and screw compressors have high requirements for gas media and can only transport pure media gases. For gases containing multi-phase media, especially hydrocarbons, moisture, impurities and other components, the failure rate is high, and even explosions and other accidents may occur. Utility Model Content

[0006] The main technical problem to be solved by the utility model is to provide a spiral reciprocating driven tank top volatile gas recovery and transportation device, which can recover and pressurize the volatile gas of the storage tank, and directly recover and transport the volatile gas of the storage tank to a centralized treatment point before it is treated, thereby saving the cost of decentralized treatment, and the volatile gas does not enter the pressurizing device, thereby not damaging the pressurizing device, extending the service life, and preventing the occurrence of safety accidents.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0008] A spiral reciprocating driven tank top volatile gas recovery and delivery device comprises a base, a pressurizing device is arranged at one side of the base, a power input end of the pressurizing device is fixedly connected to a power device, a delivery pipe group is connected to the outer wall of the pressurizing device, and a control cabinet is fixedly installed near the power device on the base;

[0009] The pressurizing device comprises two parallel and spaced support seats fixedly mounted on one side of the base, and the same cylinder body is fixedly mounted on the two support seats;

[0010] A spiral shaft is rotatably installed in the cylinder body, and a mechanical seal is arranged at the position where the spiral shaft extends out of the cylinder body;

[0011] A left spiral groove is formed on the outer surface of one end of the spiral shaft, and a right spiral groove is formed on the outer surface of the other end of the spiral shaft, and the left spiral groove and the right spiral groove are arranged symmetrically;

[0012] The left spiral groove is threadedly connected to a left piston, and the right spiral groove is threadedly connected to a right piston, and the left spiral groove and the right spiral groove have opposite rotation directions;

[0013] The delivery pipe group includes a left piston chamber connecting pipe and a right piston chamber connecting pipe both of which are connected to the cylinder body;

[0014] The other ends of the left piston chamber connecting tube and the right piston chamber connecting tube are connected to the same connecting tube, and the other ends of the connecting tubes are connected to a spiral isolation tube;

[0015] The outer wall of the spiral isolation tube is connected with an inlet pipe, which is connected with an inlet one-way valve; the outer wall of the spiral isolation tube is connected with an outlet pipe near the inlet pipe, which is connected with an outlet one-way valve.

[0016] The following is a further optimization of the above technical solution by the utility model:

[0017] A first driving fluid hole is provided at one side of the outer wall of the cylinder body, and a second driving fluid hole is provided at the other side of the outer wall of the cylinder body.

[0018] Further optimization: the space between the end face of the left piston away from the right piston and one side of the cylinder body is set as the left piston cavity, the space between the end face of the right piston away from the left piston and the other side of the cylinder body is set as the right piston cavity, the position of the left piston cavity corresponds to the first driving liquid hole at the same time, the position of the right piston cavity corresponds to the second driving liquid hole at the same time, and the left piston cavity and the right piston cavity are both filled with driving liquid;

[0019] The space between the left piston and the right piston is arranged as a lubrication cavity, and the lubrication cavity is filled with a lubrication medium.

[0020] Further optimization: the screw shaft is fixedly connected to the power device at one end outside the cylinder body.

[0021] Further optimization: the power device includes a reducer fixedly connected to one end of the screw shaft on the outside of the cylinder body, a coupling is fixedly installed on the power input end of the reducer, and a motor is fixedly installed on one end of the coupling.

[0022] Further optimization: the left piston chamber connecting tube is sealed and connected to the first driving fluid hole and connected to the left piston chamber, and the right piston chamber connecting tube is sealed and connected to the second driving fluid hole and connected to the right piston chamber.

[0023] Further optimization: a lubrication hole is opened in the middle of the cylinder body, and a cooling device is fixedly installed on the outer wall of the cylinder body.

[0024] Further optimization: the cooling device comprises a cooling cylinder body fixedly and sealedly mounted on the outer wall of the cylinder body.

[0025] Further optimization: the cooling cylinder body has a plurality of cooling pipes in an annular array inside the cooling cylinder body, a first baffle is fixedly installed at one side inside the cooling cylinder body, and the space between the first baffle and one side inside the cooling cylinder body is set as a left cooling chamber;

[0026] A second partition is fixedly installed at the other side of the interior of the cooling cylinder body, and the space between the second partition and the other side of the interior of the cooling cylinder body is set as a right cooling chamber.

[0027] Further optimization: the inlet end of the cooling pipe is connected to the outlet end of the cooling system, and the outlet end of the cooling pipe is connected to the inlet end of the right cooling system.

[0028] The utility model adopts the above technical solution and has the following beneficial effects:

[0029] 1. The utility model adopts the above technical scheme, which is ingenious in conception and reasonable in structure. It can pressurize and transport the volatile gas during the transportation process of the volatile gas on the tank top, and during the pressurization process, the volatile gas does not enter the pressurizing device, but is pressurized in the spiral isolation tube. In this design, the volatile gas does not contact the pressurizing device, which can extend the service life of the pressurizing device and is safe and reliable. At the same time, the control system is used to control the motor to realize forward and reverse rotation, which is simple to operate, and the overall structure is simple, which is convenient for manufacturing and production, and can reduce production and use costs and improve economic benefits.

[0030] 2. When the volatile gas needs to be pressurized, the control system drives the motor to rotate forward, so that the left piston and the right piston move away from each other, compressing the left piston cavity and the right piston cavity. At this time, the pressure generated by compressing the left piston cavity and the right piston cavity acts on the volatile gas, so that the volatile gas is transported through the outlet pipe and the outlet check valve at high pressure;

[0031] With this design, the control system controls the motor to rotate back and forth, driving the left piston and the right piston to move back and forth in the direction of approaching or moving away from each other, thereby achieving the inhalation and high-pressure output of volatile gas;

[0032] 3. The lubrication cavity is filled with lubricating medium, which plays a lubricating role in the left and right movement of the left piston and the right piston, further extending the service life of the left piston, the right piston and the screw shaft. At the same time, the lubricating medium plays a cooling role, further protecting the pressurizing device and increasing the service life.

[0033] The utility model is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the utility model;

[0035] Figure 2 This is a schematic diagram of the structure of the screw shaft assembly in Example 1 of the utility model;

[0036] Figure 3 This is a schematic diagram of the structure of the cylinder body in Example 1 of the utility model;

[0037] Figure 4 It is a top view of the overall structure in Example 1 of the utility model;

[0038] Figure 5 It is a cross-sectional view of the pressurizing device in Example 1 of the utility model;

[0039] Figure 6 This is a schematic diagram of the structure of the power device in Example 1 of the utility model;

[0040] Figure 7 This is a schematic diagram of the structure of the delivery pipe group in Example 1 of the utility model;

[0041] Figure 8 It is a top view of the overall structure in Example 2 of the utility model;

[0042] Fig. 9 This is a schematic diagram of the internal structure of the cooling cylinder in Example 2 of the utility model;

[0043] Fig.10 It is a partial cross-sectional view of the overall structure in Example 2 of the utility model;

[0044] Fig.11 This is a cross-sectional view of the cooling cylinder in Example 2 of the present utility model.

[0045] In the figure: 1-base; 2-pressurizing device; 21-support seat; 22-cylinder body; 220-first driving fluid hole; 221-second driving fluid hole; 222-lubricating hole; 230-screw shaft; 231-left spiral groove; 232-right spiral groove; 233-left piston; 234-right piston; 24-left piston chamber; 240-driving fluid; 25-right piston chamber; 26-lubricating chamber; 260-lubricating medium; 27-first limit switch; 28-mechanical seal; 29-second limit switch; 3-delivery pipe group; 31- Left piston chamber connecting pipe; 32-right piston chamber connecting pipe; 33-connecting pipe; 34-spiral isolation pipe; 35-inlet pipe; 36-inlet check valve; 37-outlet pipe; 38-outlet check valve; 4-power unit; 41-reducer; 42-coupling; 43-motor; 5-cooling device; 51-cooling pipe; 52-cooling system; 53-cooling medium; 54-cooling cylinder; 55-left cooling chamber; 550-first partition; 56-right cooling chamber; 560-second partition; 57-middle chamber; 6-control cabinet. DETAILED DESCRIPTION

[0046] Example 1: Figure 1-7 As shown: a spiral reciprocating driven tank top volatile gas recovery and delivery device, comprising a base 1, a pressurizing device 2 is arranged at one side of the base 1, a power input end of the pressurizing device 2 is fixedly connected to a power device 4, a delivery pipe group 3 is connected to the outer wall of the pressurizing device 2, and a control cabinet 6 is fixedly installed on the base 1 near the power device 4;

[0047] The pressurizing device 2 includes two parallel and spaced support seats 21 fixedly mounted on one side of the base 1 .

[0048] The same cylinder body 22 is fixedly mounted on the two support seats 21 . A first driving fluid hole 220 is opened at one side of the outer wall of the cylinder body 22 , and a second driving fluid hole 221 is opened at the other side of the outer wall of the cylinder body 22 .

[0049] The first driving fluid hole 220 and the second driving fluid hole 221 are symmetrically arranged and both communicate with the interior of the cylinder body 22 .

[0050] A screw shaft 230 is rotatably installed in the cylinder body 22 , and bearings are fixedly installed at both ends of the cylinder body 22 , which are not indicated in the figure. The two ends of the screw shaft 230 are respectively fixedly connected to the corresponding middle mounting holes of the bearings, wherein one end of the screw shaft 230 extends to the outside of the cylinder body 22 .

[0051] A mechanical seal 28 is provided at the position where the spiral shaft 230 extends out of the cylinder body 22. In the prior art, the sealing principle of the mechanical seal 28 is well known and widely used, and will not be described in detail here.

[0052] A left spiral groove 231 is formed on the outer surface of one end of the spiral shaft 230 , and a right spiral groove 232 is formed on the outer surface of the other end of the spiral shaft 230 . The left spiral groove 231 and the right spiral groove 232 are symmetrically arranged.

[0053] The left spiral groove 231 is threadedly connected to a left piston 233 , and the right spiral groove 232 is threadedly connected to a right piston 234 .

[0054] The left spiral groove 231 and the right spiral groove 232 have opposite rotation directions.

[0055] The space between an end surface of the left piston 233 away from the right piston 234 and one side of the interior of the cylinder body 22 is set as a left piston chamber 24.

[0056] The space between the right piston 234 and one end surface away from the left piston 233 and the other side of the cylinder body 22 is set as a right piston chamber 25.

[0057] The position of the left piston chamber 24 corresponds to the first driving fluid hole 220 , and the position of the right piston chamber 25 corresponds to the second driving fluid hole 221 .

[0058] The left piston chamber 24 and the right piston chamber 25 are both filled with a driving liquid 240. In the present embodiment 1, the driving liquid 240 is a liquid that is insoluble in gas. With this design, when the driving liquid 240 contacts the volatile gas, it has no effect on the volatile gas.

[0059] The space between the left piston 233 and the right piston 234 is configured as a lubrication chamber 26 .

[0060] The lubrication cavity 26 is filled with a lubrication medium 260 . In the first embodiment, the lubrication medium 260 also plays a role in cooling.

[0061] One end of the screw shaft 230 outside the cylinder body 22 is fixedly connected to the power device 4 .

[0062] like Figure 7 As shown, the power device 4 includes a reducer 41 fixedly connected to one end of the screw shaft 230 outside the cylinder body 22, a coupling 42 is fixedly installed at the power input end of the reducer 41, and a motor 43 is fixedly installed at one end of the coupling 42.

[0063] The delivery pipe group 3 includes a left piston chamber connecting pipe 31 and a right piston chamber connecting pipe 32 both connected to the cylinder body 22;

[0064] The other ends of the left piston chamber connecting tube 31 and the right piston chamber connecting tube 32 are connected to the same connecting tube 33 via a three-way joint.

[0065] The other end of the connecting pipe 33 is connected to a spiral isolation pipe 34 .

[0066] The outer wall of the spiral isolation tube 34 is connected with an inlet tube 35 , and the inlet tube 35 is connected with an inlet check valve 36 .

[0067] An outlet pipe 37 is connected to the outer wall of the spiral isolation pipe 34 near the inlet pipe 35 , and an outlet check valve 38 is connected to the outlet pipe 37 .

[0068] The other end of the inlet pipe 35 is connected to the pipeline of the volatile gas on the tank top through a pipeline. In this design, the volatile gas on the tank top enters the inlet pipe 35 through the pipeline.

[0069] The other end of the outlet pipe 37 is communicated with a pipeline for conveying high-pressure gas.

[0070] The left piston chamber connecting tube 31 is sealedly connected to the first driving fluid hole 220 and connected to the left piston chamber 24 .

[0071] The right piston chamber connecting tube 32 is sealedly connected to the second driving fluid hole 221 and is connected to the right piston chamber 25 .

[0072] In the prior art, the spiral isolation tube 34 can effectively implement gas-liquid separation and has a smooth transportation effect. The gas-liquid separation function of the spiral isolation tube 34 and its working principle are well known and widely used, and will not be repeated here.

[0073] A first limit switch 27 is fixedly installed on the outer side of the cylinder body 22 near the mechanical seal 28 , and a second limit switch 29 is fixedly installed on the outer side of the cylinder body 22 near the middle position.

[0074] The first limit switch 27 and the second limit switch 29 are used to detect the positions of the left piston 233 and the right piston 234 .

[0075] The control cabinet 6 is provided with a control system for driving the device to operate, and the control ends of the first limit switch 27 and the second limit switch 29 are electrically connected to the control system through wires.

[0076] The control end of the motor 43 is electrically connected to the control system through an electric wire.

[0077] When in use, the volatile gas collected on the tank top enters the spiral isolation tube 34 through the inlet pipe 35 and the inlet non-return valve 36. At the same time, the starter motor 43 is controlled to rotate forward, driving the spiral shaft 230 to rotate, so that the left piston 233 and the right piston 234 move away from each other, compressing the left piston chamber 24 and the right piston chamber 25.

[0078] In this way, the driving liquid 240 in the left piston chamber 24 and the right piston chamber 25 enters the spiral isolation tube 34 through the left piston chamber connecting tube 31, the right piston chamber connecting tube 32 and the connecting tube 33 respectively, and contacts with the volatile gas, so that the internal pressure of the cylinder body 22 reaches a balanced state. At this time, if the motor 43 stops working, the volatile gas in the spiral isolation tube 34 is output through the outlet pipe 37 and the outlet one-way valve 38 at normal pressure.

[0079] When the transported volatile gas needs to be pressurized, the control system controls the drive motor 43 to continue to rotate forward, so that the left piston 233 and the right piston 234 continue to move away from each other, compressing the left piston chamber 24 and the right piston chamber 25. At this time, the pressure generated by compressing the left piston chamber 24 and the right piston chamber 25 acts on the volatile gas, so that the volatile gas is output through the outlet pipe 37 and the outlet one-way valve 38 for transportation.

[0080] When the right piston 234 moves to the first limit switch 27, the first limit switch 27 feeds back a signal to the control system. At this time, the control system controls the motor 43 to reverse, driving the spiral shaft 230 to rotate in the opposite direction, so that the left piston 233 and the right piston 234 move in a direction close to each other. At the same time, under the action of the lubricating medium 260, the left piston 233 and the right piston 234 move smoothly. At this time, the volume of the left piston chamber 24 and the right piston chamber 25 increases, and the pressure decreases, and then the driving liquid 240 flows from the spiral isolation tube 34 to the left piston chamber 24 and the right piston chamber 25, and the spiral isolation tube 34 quickly sucks the volatile gas into the spiral isolation tube 34 through the inlet pipe 35 and the inlet one-way valve 36.

[0081] When the left piston 233 and the right piston 234 move toward each other and reach the second limit switch 29, the second limit switch 29 feeds back a signal to the control system, and the control system drives the motor 43 to reverse the rotation direction. In this way, the control system controls the motor 43 to rotate back and forth, driving the left piston 233 and the right piston 234 to move back and forth toward each other or away from each other, thereby realizing the suction and high-pressure output of volatile gas.

[0082] When the volatile gas is being pressurized and output through the device, the volatile gas does not directly enter the pressurizing device 2, which can extend the service life of the internal components of the pressurizing device 2 and improve the use efficiency.

[0083] Example 2: Figure 2 , Figure 8-11 As shown, a spiral reciprocating driven tank top volatile gas recovery and transportation device is provided. On the basis of Example 1, a lubrication hole 222 is provided at the middle position of the cylinder body 22, and a cooling device 5 is fixedly installed on the outer wall of the cylinder body 22.

[0084] The cooling device 5 comprises a cooling cylinder 54 fixedly and sealingly mounted on the outer wall of the cylinder 22 .

[0085] The cooling cylinder 54 has a plurality of cooling tubes 51 arranged in an annular array inside. A first partition 550 is fixedly installed at a position inside the cooling cylinder 54 corresponding to the left piston chamber 24 . The space between the first partition 550 and one side inside the cooling cylinder 54 is set as a left cooling chamber 55 .

[0086] The driving fluid 240 flows out into the left cooling chamber 55 through the first driving fluid hole 220 , and the left piston chamber connecting pipe 31 is connected to the left cooling chamber 55 , which is not indicated in the figure.

[0087] A second partition plate 560 is fixedly installed at a position inside the cooling cylinder 54 corresponding to the right piston chamber 25 .

[0088] The space between the second partition plate 560 and the other side of the interior of the cooling cylinder 54 is configured as a right cooling chamber 56 .

[0089] The driving fluid 240 flows out into the right cooling chamber 56 through the second driving fluid hole 221 , and the right piston chamber connecting pipe 32 is connected to the right cooling chamber 56 .

[0090] An intermediate cavity 57 is provided between the first partition plate 550 and the second partition plate 560 , and the lubrication hole 222 is communicated with the intermediate cavity 57 . In this way, the lubrication medium 260 flows out into the intermediate cavity 57 through the lubrication hole 222 .

[0091] The cooling pipe 51 passes through the left cooling cavity 55 , the middle cavity 57 and the right cooling cavity 56 .

[0092] The inlet end of the cooling pipe 51 is connected to the outlet end of the cooling system 52 , and the outlet end of the cooling pipe 51 is connected to the inlet end of the right cooling system 52 , which is not indicated in the figure.

[0093] The cooling pipe 51 is filled with cooling medium 53. The cooling medium 53 flowing out from the outlet end of the cooling system 52 enters the cooling cylinder 54 to cool the drive liquid 240 and further cool the lubricating medium 260. The cooling medium 53 that absorbs heat in the cooling cylinder 54 returns to the cooling system 52 for cooling treatment. The cooling principle of the cooling system 52 is well known in the prior art and will not be repeated here.

[0094] With this design, when the driving fluid 240 flows multiple times and generates heat, the heat can be cooled by the cooling device 5, thereby ensuring the service life of the device.

[0095] For ordinary technicians in this field, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and deformations made to the implementation methods are still within the protection scope of the present invention.

Claims

1. A spiral reciprocating driven tank top volatile gas recovery and conveying device, comprising a base (1), characterized in that: A pressurizing device (2) is provided at a position on one side of the base (1); a power input end of the pressurizing device (2) is fixedly connected to a power device (4); a conveying pipe group (3) is connected to the outer wall of the pressurizing device (2); and a control cabinet (6) is fixedly installed at a position near the power device (4) on the base (1); The pressurizing device (2) comprises two parallel support seats (21) fixedly mounted on one side of the base (1) and arranged at intervals, and the same cylinder body (22) is fixedly mounted on the two support seats (21); A screw shaft (230) is rotatably mounted in the cylinder body (22), and a mechanical seal (28) is provided at a position where the screw shaft (230) protrudes out of the outside of the cylinder body (22); A left spiral groove (231) is formed on the outer surface of one end of the spiral shaft (230), and a right spiral groove (232) is formed on the outer surface of the other end of the spiral shaft (230), wherein the left spiral groove (231) and the right spiral groove (232) are symmetrically arranged; The left spiral groove (231) is threadedly connected to a left piston (233), and the right spiral groove (232) is threadedly connected to a right piston (234), and the left spiral groove (231) and the right spiral groove (232) have opposite rotation directions; The delivery pipe group (3) comprises a left piston chamber connecting pipe (31) and a right piston chamber connecting pipe (32) both of which are connected to the cylinder body (22); The other ends of the left piston chamber connecting tube (31) and the right piston chamber connecting tube (32) are connected to the same connecting tube (33), and the other ends of the connecting tube (33) are connected to a spiral isolation tube (34); The outer wall of the spiral isolation tube (34) is connected to an inlet tube (35), and the inlet tube (35) is connected to an inlet check valve (36). The outer wall of the spiral isolation tube (34) is connected to an outlet tube (37) at a position close to the inlet tube (35), and the outlet tube (37) is connected to an outlet check valve (38).

2. The spiral reciprocating driven tank top volatile gas recovery and conveying device according to claim 1 is characterized in that: A first driving fluid hole (220) is provided at one side of the outer wall of the cylinder body (22), and a second driving fluid hole (221) is provided at the other side of the outer wall of the cylinder body (22).

3. The spiral reciprocating driven tank top volatile gas recovery and conveying device according to claim 2 is characterized in that: The space between an end surface of the left piston (233) away from the right piston (234) and one side of the cylinder body (22) is set as a left piston chamber (24), and the space between the end surface of the right piston (234) away from the left piston (233) and the other side of the cylinder body (22) is set as a right piston chamber (25). The position of the left piston chamber (24) corresponds to the first driving liquid hole (220), and the position of the right piston chamber (25) corresponds to the second driving liquid hole (221). Both the left piston chamber (24) and the right piston chamber (25) are filled with driving liquid (240). The space between the left piston (233) and the right piston (234) is provided as a lubrication chamber (26), and the lubrication chamber (26) is filled with a lubrication medium (260).

4. The spiral reciprocating driven tank top volatile gas recovery and conveying device according to claim 3 is characterized in that: One end of the screw shaft (230) outside the cylinder body (22) is fixedly connected to the power device (4).

5. The spiral reciprocating driven tank top volatile gas recovery and conveying device according to claim 4 is characterized in that: The power device (4) comprises a reducer (41) fixedly connected to one end of the screw shaft (230) outside the cylinder body (22); a coupling (42) is fixedly mounted on the power input end of the reducer (41); and a motor (43) is fixedly mounted on one end of the coupling (42).

6. The spiral reciprocating driven tank top volatile gas recovery and conveying device according to claim 5, characterized in that: The left piston chamber connecting tube (31) is sealedly connected to the first driving fluid hole (220) and is connected to the left piston chamber (24), and the right piston chamber connecting tube (32) is sealedly connected to the second driving fluid hole (221) and is connected to the right piston chamber (25).

7. The spiral reciprocating driven tank top volatile gas recovery and conveying device according to claim 1 is characterized in that: A lubrication hole (222) is provided at a middle position of the cylinder body (22), and a cooling device (5) is fixedly mounted on the outer wall of the cylinder body (22).

8. The spiral reciprocating driven tank top volatile gas recovery and conveying device according to claim 7 is characterized in that: The cooling device (5) comprises a cooling cylinder (54) fixedly and sealingly mounted on the outer wall of the cylinder (22).

9. The spiral reciprocating driven tank top volatile gas recovery and conveying device according to claim 8, characterized in that: The cooling cylinder (54) has a plurality of cooling pipes (51) arranged in an annular array inside the cooling cylinder (54); a first partition plate (550) is fixedly installed at a position on one side inside the cooling cylinder (54); and a space between the first partition plate (550) and one side inside the cooling cylinder (54) is set as a left cooling chamber (55); A second partition plate (560) is fixedly installed at the other side of the interior of the cooling cylinder body (54), and the space between the second partition plate (560) and the other side of the interior of the cooling cylinder body (54) is set as a right cooling chamber (56).

10. The spiral reciprocating driven tank top volatile gas recovery and conveying device according to claim 9, characterized in that: The inlet end of the cooling pipe (51) is connected to the outlet end of the cooling system (52), and the outlet end of the cooling pipe (51) is connected to the inlet end of the right cooling system (52).

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