Oil discharge hand hole well

Abstract

The utility model discloses an oil discharge hand hole well, which belongs to the technical field of oil discharge hand hole wells, and comprises a barrel body and a round cover detachably connected with the top end of the barrel body, a base is fixedly arranged at the bottom end of the barrel body, a vertical pipe is fixedly arranged in the base along the axial direction, a ball valve is arranged at the top end of the vertical pipe, and the bottom end of the vertical pipe is communicated with an underground oil tank through an oil discharge pipeline. A sealing cover is arranged at the top end of the ball valve; an annular space is formed between the vertical pipe and the barrel; an oil return valve is arranged on the upper end face of the base located in the cylinder, and a plurality of oil return holes are evenly formed in the outer surface of the oil return valve along the circumference. When residual oil is recovered through the oil return valve, the oil return valve is opened, and the driving device drives the two cleaning rods to synchronously and reversely slide on the upper end face of the base located in the annular space through the transmission device, so that the residual oil on the upper end face of the base is scraped and pushed by the two cleaning rods until the residual oil is pushed into an oil return hole of the oil return valve; recovery of residual oil is achieved, and operation and cleaning are convenient.

Description

Technical Field

[0001] The utility model relates to an oil unloading manhole well, in particular to an oil unloading manhole well which is convenient to clean. Background Technique

[0002] An oil unloading manhole well is a device used when loading and transporting liquid goods such as storage tanks and tank trucks. It usually consists of a round cover and a cylinder body. Its main function is to achieve rapid unloading of oil products and connection and disconnection of pipelines. For example, when unloading oil at a gas station, the round cover is opened, the sealing cover is removed, and the unloading joint on the oil unloading hose of the oil tanker is connected to the top end of the ball valve. The connection method is generally through a quick joint. Then, the oil on the oil tanker is transported into the underground buried oil tank through the oil unloading hose, ball valve, vertical pipe and oil unloading pipeline. Due to reasons such as the flexibility and sealing of the pipeline, oil liquid often accumulates at the upper end face of the base in the annular space during the oil unloading operation. The problem of accumulated liquid in the oil unloading manhole involves the use scenarios of oil tanks, storage tanks or containers, covering multiple fields such as the petroleum industry, refining industry, chemical industry and transportation industry. Specifically, in the oil product receiving and unloading operation at a gas station, this operation is an important link in the operation of the gas station.

[0003] The accumulated liquid belongs to volatile organic compounds. If not cleaned in time, it will have a serious impact on the environmental emissions of the gas station, and even cause abnormal detection of indicators such as unorganized emissions. Restricted by reasons such as the space of the manhole well and the position of the accumulated liquid, the cleaning of the oil product accumulated liquid is time-consuming and laborious. Gasoline and diesel are flammable products, and frequent cleaning of the accumulated liquid brings certain safety hazards. Content of the Utility Model

[0004] The purpose of the utility model is to provide an oil unloading manhole well, which has the advantage of being convenient to clean the accumulated liquid inside the oil unloading manhole well, and solves the problem of difficult cleaning of the accumulated liquid in the manhole well.

[0005] The utility model adopts the following technical scheme: an oil unloading manhole well, comprising a cylinder body, and a round cover detachably connected to the top end of the cylinder body. A base is fixedly arranged at the bottom end of the cylinder body. A vertical pipe is fixedly arranged along the axis inside the base. A ball valve is arranged at the top end of the vertical pipe. The bottom end of the vertical pipe is communicated with an underground oil tank through an oil unloading pipeline. A sealing cover is arranged at the top end of the ball valve. An annular space is formed between the vertical pipe and the cylinder body. An oil return valve is arranged on the upper end face of the base located inside the cylinder body. A plurality of oil return holes are evenly arranged along the circumference on the outer surface of the oil return valve. Each oil return hole is communicated with the annular space on the upper end face of the base. The bottom end of the oil return valve is communicated with the underground vertical pipe. Two cleaning rods are slidably arranged along the circumferential direction of the annular space on the upper end face of the base located inside the cylinder body. The lower end face of each cleaning rod is in sliding contact with the upper end face of the base. A driving device and a transmission device are also arranged inside the cylinder body. The driving device drives the two cleaning rods to slide synchronously and in opposite directions on the upper end face of the base located inside the annular space through the transmission device.

[0006] Further, two driving gears are rotatably connected to the outer surface of the vertical pipe below the ball valve. A connecting rod is fixedly arranged on the outer surface of each driving gear. The bottom end of each connecting rod is fixedly arranged with a corresponding cleaning rod. The initial positions of the two cleaning rods are symmetrical to the oil return valve, and the two cleaning rods are combined together.

[0007] Further, the transmission device includes two first bevel gears, and a transmission gear coaxially and fixedly arranged on the bottom surface of the first bevel gear. Each transmission gear meshes with a corresponding driving gear. A rotating shaft is coaxially and fixedly arranged on one side surface of each transmission gear away from each other. Each rotating shaft is rotatably connected to two fixedly arranged fixing plates. The upper fixing plate is fixedly arranged with the vertical pipe, and the lower fixing plate is fixedly arranged with the base. The outer ends of the two fixing plates are connected together by a side plate. A transmission shaft is arranged along the radial direction of the base inside the side plate. The transmission shaft is rotatably connected to the side plate. A second bevel gear is fixedly arranged at the inner end of the transmission shaft. The second bevel gears are meshed with the two first bevel gears. A third bevel gear is fixedly arranged at the outer end of the transmission shaft.

[0008] Further, the driving device includes a transmission rod arranged axially in the cylinder body. A fourth bevel gear is fixedly arranged at the bottom end of the transmission rod. The fourth bevel gear meshes with the third bevel gear. The transmission rod is rotatably connected to the first top plate fixedly arranged on the upper part of the inner side wall of the cylinder body.

[0009] Further, the oil return valve includes a valve body fixedly arranged on the upper end surface of the base located in the annular space. An oil return hole is opened on the valve body and communicated with the valve cavity in the valve body. A push rod is slidably arranged vertically in the valve body. A limiting plate is fixedly arranged at the top end of the push rod. A valve core is fixedly arranged at the bottom end of the push rod. A valve seat is fixedly arranged in the valve cavity of the valve body above the valve core. A pressing plate is coaxially and fixedly arranged on the push rod above the valve seat. A spring is arranged between the pressing plate and the valve seat. The bottom end of the valve body is fixedly arranged with a return pipe. The top end of the return pipe is communicated with the valve cavity of the valve body. The bottom end of the return pipe is communicated with the vertical pipe.

[0010] Further, a cone is fixedly arranged on the outer surface of the vertical pipe above the base. The outer surface of the cone is fixedly arranged with the lower fixing plate. A ring body is coaxially and fixedly arranged on the lower part of the inner side wall of the cylinder body above the base. The inner side wall of the ring body is an inclined surface. The annular space is formed by the space between the cone and the ring body.

[0011] Further, a concave surface is opened on the upper end surface of the base around the valve body.

[0012] Further, an annular track is fixedly arranged on the upper end surface of the base located in the annular space. Sliding grooves are opened on the lower end surfaces of the two cleaning rods. The two cleaning rods are slidably connected to the base through the annular track and the sliding grooves.

[0013] Further, a worm gear is fixedly arranged at the outer end of the valve stem of the ball valve. A vertical rod is arranged in the cylinder body along the vertical direction. The vertical rod is rotatably connected to a second top plate fixedly arranged on the upper part of the inner side wall of the cylinder body, and the bottom end of the vertical rod is rotatably connected to a bottom plate fixedly arranged on the lower part of the inner side wall of the cylinder body. A worm is fixedly arranged at a position corresponding to the worm gear on the outer surface of the vertical rod, and the worm meshes with the worm gear.

[0014] Further, the lower part of the outer surface of the transmission rod is rotatably connected to the upper fixing plate.

[0015] First, by setting an oil return valve, a driving device, a transmission device and two cleaning rods, when recovering residual oil through the oil return valve, the oil return valve is opened. The driving device drives the two cleaning rods to slide synchronously and reversely on the upper end surface of the base located in the annular space through the transmission device, so that the two cleaning rods scrape and push the residual oil on the upper end surface of the base until it is pushed into the oil return hole of the oil return valve, realizing the recovery of residual oil, which is convenient for operation and cleaning.

[0016] Second, by setting two transmission gears, two first bevel gears and a third bevel gear, in use, the driving device drives the two first bevel gears to rotate synchronously and in the same direction through the third bevel gear, the transmission shaft and the second bevel gear in sequence, and then makes the two transmission gears rotate synchronously and reversely, and further makes the two transmission gears drive the two driving gears to rotate synchronously and reversely, and further makes the two driving gears drive the two cleaning rods to slide synchronously and reversely in the annular space through the connecting rod, so that the two cleaning rods clean and push the residual oil on the upper end surface of the base, making the residual oil approach the oil return valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall three-dimensional structure schematic diagram of the present invention;

[0018] Figure 2 is the front view structure schematic diagram of the present invention;

[0019] Figure 3 is the three-dimensional structure schematic diagram of the interior of the cylinder body of the present invention;

[0020] Figure 4 is the three-dimensional structure schematic diagram of the ball valve of the present invention;

[0021] Figure 5 is the three-dimensional structure schematic diagram of the ring body of the present invention;

[0022] Figure 6 is the three-dimensional structure schematic diagram of the base of the present invention;

[0023] Figure 7 is the three-dimensional structure schematic diagram of the closed state of the reflux valve of the present invention;

[0024] Figure 8 3D structural schematic diagram of the open state of the reflux valve of the present utility model;

[0025] Figure 9 Internal structural schematic diagram of the base of the present utility model;

[0026] Figure 10 of the present utility model Figure 9 Enlarged schematic diagram of the structure at position A in

[0027] Figure 11 3D internal structural schematic diagram of the valve body of the present utility model;

[0028] Figure 12 3D structural schematic diagram of the valve core of the present utility model.

[0029] In the figure, 1. Cylinder; 2. Round cover; 3. Base; 4. Vertical pipe; 5. Ball valve; 6. Sealing cover; 7. Oil return valve; 8. Oil return hole; 9. Cleaning rod; 10. Driving gear; 11. Connecting rod; 12. First bevel gear; 13. Transmission gear; 14. Rotating shaft; 15. Fixed plate; 16. Side plate; 17. Transmission shaft; 18. Second bevel gear; 19. Third bevel gear; 20. Transmission rod; 21. Fourth bevel gear; 22. First top plate; 23. Valve body; 24. Push rod; 25. Limiting plate; 26. Valve core; 27. Valve seat; 28. Pressure plate; 29. Spring; 30. Reflux pipe; 31. Cone; 32. Ring body; 33. Concave surface; 34. Annular track; 35. Worm gear; 36. Vertical rod; 37. Second top plate; 38. Bottom plate; 39. Worm. Specific embodiments

[0030] The present utility model will be described in detail below with reference to the accompanying drawings and embodiments:

[0031] Please refer to Figures 1-12, for the oil unloading manhole well of the present utility model, it includes a cylinder body 1 and a round cover 2 detachably connected to the top end of the cylinder body 1. A base 3 is fixedly arranged at the bottom end of the cylinder body 1. A vertical pipe 4 is fixedly arranged along the axis inside the base 3. A ball valve 5 is arranged at the top end of the vertical pipe 4. The bottom end of the vertical pipe 4 is communicated with an underground oil tank through an oil unloading pipeline. A sealing cover 6 is arranged at the top end of the ball valve 5. An annular space is formed between the vertical pipe 4 and the cylinder body 1. By removing the sealing cover 6 obliquely, the top end of the ball valve 5 can be quickly connected with the oil unloading joint on the oil unloading hose of the oil tanker; on the upper end surface of the base 3 located inside the cylinder body 1, an oil return valve 7 is further arranged. A plurality of oil return holes 8 are evenly opened along the circumference on the outer surface of the oil return valve 7. Each oil return hole 8 is communicated with the annular space on the upper end surface of the base 3. The bottom end of the oil return valve 7 is communicated with the underground vertical pipe 4. Two cleaning rods 9 are slidably arranged along the circumferential direction of the annular space on the upper end surface of the base 3 located inside the cylinder body 1. The lower end surface of each cleaning rod 9 is in sliding contact with the upper end surface of the base 3. A driving device and a transmission device are also arranged inside the cylinder body 1. The driving device drives the two cleaning rods 9 to slide synchronously and reversely on the upper end surface of the base 3 located inside the annular space through the transmission device.

[0032] During use, when unloading oil at a gas station, open the round cover 2 and remove the sealing cover 6 obliquely. The oil unloading joint on the oil unloading hose of the oil tanker is connected to the top end of the ball valve 5. The connection method is generally through a quick connector, which is prior art and will not be elaborated here. Then, the oil on the oil tanker is transported into the underground buried oil tank through the oil unloading hose, ball valve 5, vertical pipe 4 and oil unloading pipeline. Due to reasons such as the flexibility and sealing of the pipeline, oil liquid often accumulates at the upper end surface of the base 3 in the annular space during the oil unloading operation. After the oil unloading operation is completed, by opening the oil return valve 7, the accumulated oil liquid on the upper end surface of the base 3 can flow into the oil return valve 7 from the oil return holes 8, and then flow back to the vertical pipe 4 from the bottom end of the oil return valve 7, and further flow into the underground oil tank, realizing the recovery of the accumulated oil products on the upper end surface of the base 3. In actual use, since the upper end surface of the base 3 is a horizontal plane, opening the oil return valve 7 cannot make all the residual oil on the upper end surface of the base 3 flow into the oil return valve 7 completely. To solve this problem, manual cleaning is often required, and the residual oil staying on the upper end surface of the base 3 is manually pushed into the oil return valve 7, which is time-consuming and laborious. In this application, through the arranged driving device, transmission device and two cleaning rods 9, when recovering the residual oil through the oil return valve 7, open the oil return valve 7. The driving device drives the two cleaning rods 9 to slide synchronously and reversely on the upper end surface of the base 3 located inside the annular space through the transmission device, so that the two cleaning rods 9 scrape and push the residual oil on the upper end surface of the base 3 until it is pushed into the oil return holes 8 of the oil return valve 7, realizing the recovery of the residual oil, which is convenient for operation and cleaning.

[0033] In this embodiment, two driving gears 10 are rotatably connected to the outer surface of the vertical pipe 4 below the ball valve 5. A connecting rod 11 is fixedly arranged on the outer surface of each driving gear 10. The bottom end of each connecting rod 11 is fixedly arranged with a corresponding cleaning rod 9. The initial positions of the two cleaning rods 9 are symmetrical with the oil return valve 7, and the two cleaning rods 9 are combined together. During use, the two driving gears 10 are driven to rotate synchronously and in opposite directions through the transmission device, and then the two cleaning rods 9 are driven to move away from each other through the connecting rods 11, so that the two cleaning rods 9 approach the oil return valve 7 along the annular space from different directions respectively, achieving the purpose of cleaning the residual oil on the upper end surface of the base 3 by the two cleaning rods 9.

[0034] In this embodiment, the transmission device includes two first bevel gears 12 and a transmission gear 13 fixedly arranged coaxially with the bottom surface of the first bevel gear 12. Each transmission gear 13 meshes with the corresponding driving gear 10. A rotating shaft 14 is fixedly arranged coaxially on one side surface of each transmission gear 13 away from each other. Each rotating shaft 14 is rotatably connected to two fixedly arranged fixing plates 15. The upper fixing plate 15 is fixedly arranged with the vertical pipe 4, and the lower fixing plate 15 is fixedly arranged with the base 3. The outer ends of the two fixing plates 15 are connected together by a side plate 16. A transmission shaft 17 is arranged along the radial direction of the base 3 inside the side plate 16. The transmission shaft 17 is rotatably connected to the side plate 16. A second bevel gear 18 is fixedly arranged at the inner end of the transmission shaft 17. The second bevel gears 18 mesh with the two first bevel gears 12. A third bevel gear 19 is fixedly arranged at the outer end of the transmission shaft 17. During use, the driving device drives the two first bevel gears 12 to rotate in the same direction synchronously through the third bevel gear 19, the transmission shaft 17 and the second bevel gear 18 in sequence, and then the two transmission gears 13 rotate synchronously and in opposite directions, and then the two transmission gears 13 drive the two driving gears 10 to rotate synchronously and in opposite directions, and then the two driving gears 10 drive the two cleaning rods 9 to slide synchronously and in opposite directions in the annular space through the connecting rods 11, so that the two cleaning rods 9 clean and push the residual oil on the upper end surface of the base 3, making the residual oil approach the oil return valve 7.

[0035] In this embodiment, the driving device includes a transmission rod 20 arranged axially in the cylinder 1. A fourth bevel gear 21 is fixedly arranged at the bottom end of the transmission rod 20. The fourth bevel gear 21 meshes with the third bevel gear 19. The transmission rod 20 is rotatably connected to a first top plate 22 fixedly arranged on the upper part of the inner side wall of the cylinder 1. During use, the driving transmission rod 20 drives the two cleaning rods 9 to rotate synchronously and in opposite directions through the transmission rod 20, the fourth bevel gear 21, the third bevel gear 19, the transmission shaft 17, the second bevel gear 18, the two first bevel gears 12, the two transmission gears 13, the two driving gears 10 and the two connecting rods 11 in sequence.

[0036] In this embodiment, the lower part of the outer surface of the transmission rod 20 is rotatably connected to the upper fixing plate 15, which increases the rotational stability of the transmission rod 20.

[0037] In this embodiment, the oil return valve 7 includes a valve body 23 fixedly arranged on the upper end surface of the base 3 located in the annular space. The oil return hole 8 is opened on the valve body 23 and communicated with the valve cavity in the valve body 23. A push rod 24 is slidably arranged in the valve body 23 along the vertical direction. A limiting plate 25 is fixedly arranged at the top end of the push rod 24, and a valve core 26 is fixedly arranged at the bottom end of the push rod 24. A valve seat 27 is fixedly arranged in the valve cavity of the valve body 23 above the valve core 26. A pressing plate 28 is coaxially and fixedly arranged on the push rod 24 above the valve seat 27. A spring 29 is arranged between the pressing plate 28 and the valve seat 27. The bottom end of the valve body 23 is fixedly provided with a return pipe 30. The top end of the return pipe 30 is communicated with the valve cavity of the valve body 23, and the bottom end of the return pipe 30 is communicated with the vertical pipe 4. In the normal state, the spring 29 pushes the pressing plate 28 to move upward, thereby driving the push rod 24 to move upward, and further causing the valve core 26 to move upward to contact the lower end surface of the valve seat 27, so that the valve core 26 seals the inner hole of the valve seat 27, realizing the closing of the oil return valve 7. When the oil return valve 7 is opened, by pressing the push rod 24 downward, the push rod 24 drives the pressing plate 28 to overcome the thrust of the spring 29 and move downward, and further drives the valve core 26 at the bottom end to move downward, so that the valve core 26 is separated from the valve seat 27, and the inner hole of the valve seat 27 is opened. During use, when the oil unloading operation is completed, the push rod 24 is pressed downward by a tool to open the oil return valve 7, so that the residual oil on the upper end surface of the base 3 flows into the valve cavity of the valve body 23 through the oil return hole 8, then flows downward through the inner hole of the valve seat 27 into the valve cavity below the valve seat 27, and then the residual oil flows into the vertical pipe 4 through the return pipe 30, and then flows into the underground oil tank through the oil unloading pipeline, realizing the recovery of the residual oil. When the oil return valve 7 is opened, by rotating the transmission rod 20, the two cleaning rods 9 move synchronously and in opposite directions, so that the two cleaning rods 9 scrape the residual oil on the upper end surface of the base 3 in the annular space into the oil return hole 8 of the valve body 23, realizing the cleaning of the upper end surface of the base 3.

[0038] In this embodiment, a conical body 31 is fixedly arranged on the outer surface of the vertical pipe 4 above the base 3. The outer surface of the conical body 31 is fixedly arranged with the lower fixing plate 15. A ring body 32 is coaxially and fixedly arranged on the lower part of the inner side wall of the cylinder 1 above the base 3. The inner side wall of the ring body 32 is an inclined surface. The annular space is formed by the space between the conical body 31 and the ring body 32. By arranging the conical body 31 and the ring body 32, during the oil unloading operation, the residual oil can smoothly flow to the upper end surface of the base 3, realizing the purpose of collecting the residual oil.

[0039] In order to make the operation of cleaning the residual oil on the upper end surface of the base 3 easier after the oil unloading operation is completed, in this embodiment, a concave surface 33 is provided on the upper end surface of the base 3 around the valve body 23; when cleaning the residual oil, the push rod 24 can be first pressed by a tool, so that the residual oil accumulated in the concave surface 33 first flows into the oil return valve 7 for recovery. When the residual oil in the concave surface 33 has flowed out, the oil return valve 7 can be closed at this time, and then the two cleaning rods 9 are driven to clean the upper end surface of the base 3 by rotating the transmission rod 20. The residual oil on the upper end surface of the base 3 is pushed into the concave surface 33 around the valve body 23 by the cleaning rods 9 for caching. Then, the push rod 24 is pressed again by a tool to open the oil return valve 7, so that the residual oil cached in the concave surface 33 flows into the oil return valve 7 for recovery. Then, the transmission rod 20 is rotated to make the two cleaning rods 9 return to the initial position.

[0040] In this embodiment, an annular track 34 is fixedly arranged on the upper end surface of the base 3 located in the annular space. Sliding grooves are provided on the lower end surfaces of the two cleaning rods 9. The two cleaning rods 9 are slidably connected to the base 3 through the annular track 34 and the sliding grooves; by arranging the annular track 34, the smoothness of the sliding of the two cleaning rods 9 is increased.

[0041] In order to achieve the purpose of facilitating the opening of the ball valve 5, in this embodiment, a worm gear 35 is fixedly arranged at the outer end of the valve stem of the ball valve 5. A vertical rod 36 is arranged vertically in the cylinder body 1. The vertical rod 36 is rotatably connected to the second top plate 37 fixedly arranged on the upper part of the inner side wall of the cylinder body 1, and the bottom end of the vertical rod 36 is rotatably connected to the bottom plate 38 fixedly arranged on the lower part of the inner side wall of the cylinder body 1. A worm 39 is fixedly arranged at the position corresponding to the worm gear 35 on the outer surface of the vertical rod 36. The worm 39 is meshed with the worm gear 35; during the oil unloading operation, when the oil unloading joint on the oil unloading hose of the oil tanker is connected to the top end of the ball valve 5, the vertical rod 36 is rotated to drive the worm 39 to rotate, and then drive the worm gear 35 to rotate, so that the worm gear 35 opens the ball valve 5 through the valve stem, and then the oil unloading operation is carried out.

[0042] Working principle of the utility model: When unloading oil at a gas station, open the round cover 2, remove the sealing cover 6 obliquely, connect the unloading joint on the unloading hose of the oil tanker to the top end of the ball valve 5, and then transport the oil on the oil tanker into the underground buried oil tank through the unloading hose, ball valve 5, vertical pipe 4 and unloading pipeline. After the unloading operation is completed, it is necessary to clean the residual oil accumulated on the upper end surface of the base 3. First, press the push rod 24 with a tool so that the residual oil accumulated in the concave surface 33 first flows into the oil return valve 7 for recovery. At this time, the oil return valve 7 can be closed, and then drive the two cleaning rods 9 to clean the upper end surface of the base 3 by rotating the transmission rod 20. The residual oil on the upper end surface of the base 3 is pushed into the concave surface 33 around the valve body 23 by the cleaning rod 9 for caching. Then, use the tool to press the push rod 24 again to open the oil return valve 7, so that the residual oil cached in the concave surface 33 flows into the oil return valve 7 for recovery, and then rotate the transmission rod 20 to make the two cleaning rods 9 return to the initial position.

Claims

1. An oil unloading handhole well, characterized in that: The invention comprises a cylinder (1), and a round cover (2) detachably connected to the top of the cylinder (1); a base (3) is fixedly arranged at the bottom end of the cylinder (1); a vertical pipe (4) is fixedly arranged in the axial direction inside the base (3); a ball valve (5) is arranged at the top end of the vertical pipe (4); the bottom end of the vertical pipe (4) is connected to an underground oil tank through an oil unloading pipeline; a sealing cover (6) is arranged at the top end of the ball valve (5); an annular space is formed between the vertical pipe (4) and the cylinder (1); an oil return valve (7) is arranged on the upper end surface of the base (3) located inside the cylinder (1); and the outer surface of the oil return valve (7) is uniformly provided with a plurality of A plurality of oil return holes (8) are provided, each of which is in communication with the annular space on the upper end surface of the base (3). The bottom end of the oil return valve (7) is in communication with the underground vertical pipe (4). Two cleaning rods (9) are provided on the upper end surface of the base (3) located in the cylinder (1) so as to slide along the circumferential direction of the annular space. The lower end surface of each cleaning rod (9) is in sliding contact with the upper end surface of the base (3). A driving device and a transmission device are also provided in the cylinder (1). The driving device drives the two cleaning rods (9) to slide synchronously in opposite directions on the upper end surface of the base (3) located in the annular space through the transmission device.

2. The oil unloading handhole well according to claim 1, characterized in that: The outer surface of the vertical pipe (4) located below the ball valve (5) is rotatably connected to two driving gears (10), and a connecting rod (11) is fixedly arranged on the outer surface of each driving gear (10). The bottom end of each connecting rod (11) is fixedly arranged with a corresponding cleaning rod (9), and the initial positions of the two cleaning rods (9) are symmetrical with the oil return valve (7), and the two cleaning rods (9) are merged together.

3. The oil unloading handhole well according to claim 2, characterized in that: The transmission device comprises two first bevel gears (12) and a transmission gear (13) coaxially fixedly arranged with the bottom surface of the first bevel gear (12), each transmission gear (13) meshes with the corresponding driving gear (10), and a rotating shaft (14) is coaxially fixedly arranged on a side surface of each transmission gear (13) away from each other, and each rotating shaft (14) is rotatably connected to two fixedly arranged fixing plates (15), the upper fixing plate (15) is fixedly arranged with the vertical pipe (4), and the lower fixing plate (15) is fixedly arranged with the vertical pipe (4). The fixing plate (15) is fixedly arranged on the base (3), the outer ends of the two fixing plates (15) are connected together via a side plate (16), a transmission shaft (17) is arranged inside the side plate (16) along the radial direction of the base (3), the transmission shaft (17) is rotatably connected to the side plate (16), a second bevel gear (18) is fixedly arranged on the inner end of the transmission shaft (17), the second bevel gear (18) is meshed with the two first bevel gears (12), and a third bevel gear (19) is fixedly arranged on the outer end of the transmission shaft (17).

4. The oil unloading handhole well according to claim 3 is characterized in that: The driving device comprises a transmission rod (20) axially arranged in the cylinder (1), a fourth bevel gear (21) being fixedly arranged at the bottom end of the transmission rod (20), the fourth bevel gear (21) being meshed with the third bevel gear (19), and the transmission rod (20) being rotationally connected to a first top plate (22) fixedly arranged on the upper part of the inner side wall of the cylinder (1).

5. The oil unloading handhole well according to claim 4, characterized in that: The oil return valve (7) comprises a valve body (23) fixedly arranged on the upper end surface of a base (3) located in an annular space, an oil return hole (8) is formed on the valve body (23) and communicates with a valve cavity in the valve body (23), a push rod (24) is slidably arranged in the valve body (23) along a vertical direction, a limit plate (25) is fixedly arranged at the top end of the push rod (24), a valve core (26) is fixedly arranged at the bottom end of the push rod (24), a valve seat (27) is fixedly arranged in the valve cavity of the valve body (23) above the valve core (26), a pressure plate (28) is coaxially fixedly arranged on the push rod (24) above the valve seat (27), and a spring (29) is arranged between the pressure plate (28) and the valve seat (27); a return pipe (30) is fixedly arranged at the bottom end of the valve body (23), the top end of the return pipe (30) is communicated with the valve cavity of the valve body (23), and the bottom end of the return pipe (30) is communicated with the vertical pipe (4).

6. The oil unloading handhole well according to claim 3, characterized in that: A cone (31) is fixedly disposed on the outer surface of the vertical tube (4) located above the base (3), and the outer surface of the cone (31) is fixedly disposed on the fixing plate (15) below. A ring (32) is coaxially fixedly disposed on the lower portion of the inner wall of the cylinder (1) located above the base (3), and the inner wall of the ring (32) is an inclined surface. The annular space is formed by the space between the cone (31) and the ring (32).

7. The oil unloading handhole well according to claim 5, characterized in that: A concave surface (33) is formed on the upper end surface of the base (3) located around the valve body (23).

8. The oil unloading handhole well according to claim 1, characterized in that: An annular track (34) is fixedly arranged on the upper end surface of the base (3) located in the annular space, and a slide groove is provided on the lower end surfaces of the two cleaning rods (9). The two cleaning rods (9) are slidably connected to the base (3) via the annular track (34) and the slide groove.

9. The oil unloading handhole well according to claim 1, characterized in that: A worm gear (35) is fixedly provided at the outer end of the valve stem of the ball valve (5); a vertical rod (36) is provided in the cylinder (1) along the vertical direction; the vertical rod (36) is rotatably connected to a second top plate (37) fixedly provided at the upper portion of the inner wall of the cylinder (1); the bottom end of the vertical rod (36) is rotatably connected to a bottom plate (38) fixedly provided at the lower portion of the inner wall of the cylinder (1); a worm (39) is fixedly provided at a position on the outer surface of the vertical rod (36) corresponding to the worm gear (35); the worm (39) is meshed with the worm gear (35).

10. The oil unloading handhole well according to claim 4, characterized in that: The lower portion of the outer surface of the transmission rod (20) is rotatably connected to the upper fixing plate (15).

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