A pressure storage cylinder internal cleaning system

Abstract

The oil filter box is connected to the oil storage tank through an oil return pipe, and the oil filter box is connected to the oil storage tank through an oil return pipe. Located in the oil inlet section and connected to the oil outlet pipe via an oil inlet pipe connected thereto, the side wall of the oil spray section is provided with a plurality of oil spray holes connected to the accommodating chamber. The oil removal device includes a base, with multiple support seats spaced along the length at one end of the top of the base and a hydraulic cylinder disposed along its length at the other end. The support seats are used to support the pressure storage cylinder. The fixed end of the hydraulic cylinder is connected to a hydraulic pump, and the movable end can reciprocate through the interior of the pressure storage cylinder under the drive of the hydraulic pump. The end is detachably connected to an oil removal plug. When the movable end of the hydraulic cylinder retracts to the fixed end, the oil removal plug is driven to scrape the oil off the inner wall of the pressure storage cylinder along its axial direction. This can improve the cleanliness of the pressure storage cylinder and improve the cleaning efficiency, thereby meeting the sealing requirements in ultra-high voltage or ultra-high voltage circuit breakers.

Description

Technical Field

[0001] The invention relates to the technical field of pressure storage cylinder manufacturing, and in particular to a pressure storage cylinder internal cleaning system. Background Art

[0002] The accumulator cylinder of the hydraulic operating mechanism of a high-voltage circuit breaker in a power system is the energy storage component of the operating mechanism. It houses a piston, dividing the cylinder's interior into two sections: one filled with hydraulic oil and the other with high-pressure inert gas. During operation, the mechanism is first pressurized, forcing the hydraulic oil in the tank into the cylinder. The piston, propelled by the hydraulic oil, moves toward the gas side, storing energy.

[0003] Pressure accumulators are commonly used in the ultra-high voltage (UHV) power sector. They are critical, high-precision components that require extremely high internal finish and cleanliness to meet specific pressure requirements. The current accumulators are 2.35 meters long and weigh 195 kilograms. After processing, they undergo external cleaning, painting, and drying, before being moved indoors for internal flushing to remove impurities. Currently, manufacturers flush standard accumulators manually, but manual cleaning is inefficient for the length and weight of UHV accumulators and is prone to residual impurities, making it difficult to achieve the required finish and cleanliness for high-pressure accumulators. This is why we developed this cleaning system. Summary of the Invention

[0004] In view of the problems and shortcomings in the prior art, the present invention provides a system for cleaning the interior of a pressure storage cylinder.

[0005] The technical solutions of the present invention are as follows:

[0006] A pressure storage cylinder internal cleaning system, characterized by comprising a cleaning device and an oil removal device;

[0007] The cleaning device includes a mounting frame, on which an oil storage tank and an oil filter tank are fixed, the outlet of the oil storage tank is connected to a sealing plug via an oil outlet pipe, and cleaning oil is delivered to the sealing plug by a pump provided on the oil storage tank, the upper part of the sealing plug is suspended by a lifting machinery, the lower part of the sealing plug is connected to the upper end of a pressure storage cylinder and sprays cleaning oil inwardly, the lower part of the pressure storage cylinder extends into the oil filter tank, and the outlet of the oil filter tank is connected to the oil storage tank via an oil return pipe;

[0008] The sealing plug includes an oil spraying part, a connecting part, a cover part, a rotating part and an oil inlet part which are arranged in sequence along the axial direction, and an accommodating chamber extending from the oil inlet part to the oil spraying part is provided therein, and the opening of the accommodating chamber is located at the oil inlet part, and is connected with the oil outlet pipe through the oil inlet pipe connected thereto, the top of the rotating part is connected to the lifting machinery through a lifting ring, the outer diameter of the cover part is larger than the inner diameter of the pressure storage cylinder, the outer periphery of the connecting part is connected to the inner wall of the pressure storage cylinder through a thread, and a plurality of oil spray holes connected with the accommodating chamber are provided on the side wall of the oil spraying part; specifically, the axis of the oil spray hole is perpendicular to the side wall of the oil spraying part and is connected with the accommodating chamber, and is evenly spaced along the side wall of the oil spraying part.

[0009] The oil removal device includes a base, and a plurality of support seats are arranged at intervals along the length direction at one end of the top of the base, and the support seats are used to support the pressure storage cylinder. A hydraulic cylinder is arranged along its length direction at the other end of the base, and the fixed end of the hydraulic cylinder is connected to a hydraulic pump, and the movable end can reciprocate through the inside of the pressure storage cylinder under the drive of the hydraulic pump, and the oil removal plug is detachably connected to the end. When the movable end of the hydraulic cylinder retracts to the fixed end, the oil removal plug is driven to scrape the oil on the inner wall of the pressure storage cylinder along its axial direction.

[0010] According to one specific embodiment, the oil filter box comprises an outer box body and an inner box body that are nested together. The inner box body is sealed to the top of the outer box body, with the side walls and bottom spaced apart to form an oil storage chamber. The inner box body has an upward opening that communicates with the exterior. The bottom of the inner box body is provided with filter holes that communicate with the oil storage chamber, and a fine-mesh screen is provided above the bottom of the inner box body. The oil storage chamber is connected to the oil tank via an oil return pipe. Specifically, in one embodiment, the inner and outer boxes are barrel-shaped structures, and the filter holes are elongated strips arranged in a fan-shaped pattern along the circular axis of the bottom of the inner box body. The fine-mesh screen has a mesh size of 60-80, preferably 60.

[0011] Furthermore, two lifting ears are symmetrically provided on the top of the oil filter box, and a removable upper cover plate is provided on the upper cover plate. The upper cover plate is annular, and its inner hole can pass through the pressure storage cylinder. The setting of the lifting ears facilitates the installation of the oil filter box on the mounting frame.

[0012] According to a specific embodiment, the mounting frame is a stepped frame structure, including a bottom frame, a top of which is used to fix the oil storage tank, and an upper frame arranged above the bottom frame, the upper frame is higher than the top wall of the oil storage tank, and is used to fix the oil filter tank, the inlet of the oil return pipe is connected to the bottom of the oil filter tank, and the outlet is connected to the top of the oil storage tank.

[0013] Specifically, the oil filter tank can be welded from square tubes, and a stepped frame structure is provided to secure the oil filter tank at a higher position than the oil storage tank. This facilitates the return of oil from the oil filter tank to the oil storage tank by gravity, thereby reducing the number of times the pump used to return the oil from the oil filter tank to the oil storage tank is used, thereby reducing energy consumption and saving costs. Furthermore, a plurality of casters are provided at the bottom of the bottom frame to facilitate the movement of the cleaning device.

[0014] According to one specific embodiment, the outer periphery of the connecting portion is provided with multiple axially extending oil guide grooves, with multiple oil spray holes spaced at intervals at the bottom of the oil guide grooves, each communicating with the accommodating cavity. Specifically, the oil guide grooves are at the same height as the connecting portion, with at least one, and preferably three, oil spray holes spaced along the height of the oil guide grooves. The axes of the oil spray holes are perpendicular to the sidewalls of the connecting portion and communicate with the accommodating cavity. The oil guide grooves and the oil spray holes therein are used to clean impurities from the threads at the connection between the pressure accumulator and the sealing plug, thereby improving the cleanliness of the threads at the connection between the pressure accumulator and the connecting portion, and thereby improving the overall cleanliness of the pressure accumulator.

[0015] The sealing plug's accommodating cavity is a stepped hole with a gradually increasing diameter, extending in depth along the plug's central axis. The pipe joint connected to its opening is a right-angle elbow. Two lifting rings are provided, symmetrically arranged on either side of the pipe joint and greater in height than the pipe joint, for connection to a lifting mechanism. Multiple wrenches extending radially outward from the rotating portion are evenly distributed around the circumference of the rotating portion. In one embodiment, four wrenches are evenly distributed around the circumference of the rotating portion.

[0016] According to a specific embodiment, the oil removal plug is provided with at least one annular groove axially disposed on its outer periphery. An elastic O-ring is disposed within the annular groove, and the outer diameter of the elastic O-ring mates with the inner wall of the pressure accumulator. Specifically, the elastic O-ring is a rubber O-ring, which ensures that the oil removal plug maintains contact with the inner wall of the pressure accumulator as it moves along the inner wall of the pressure accumulator, thereby ensuring that the cleaning oil is completely removed.

[0017] A method for cleaning the interior of a pressure storage cylinder is implemented by using the above-mentioned cleaning system through the following steps:

[0018] S1, connect the sealing plug to one end of the pressure storage cylinder;

[0019] S2, placing the lower portion of the pressure accumulator connected to the sealing plug into the oil filter box, lifting the pressure accumulator vertically by connecting the lifting eye frame with a lifting machine, and then placing the lower end of the pressure accumulator into the inner box of the oil filter box;

[0020] S3, cleaning the pressure accumulator with cleaning oil. Start the pump provided on the oil storage tank, so that the cleaning oil enters the plugging head through the oil outlet pipe, and then is sprayed onto the inner wall of the pressure accumulator through the oil spray hole of the plugging head to clean the inside of the pressure accumulator;

[0021] S4, cleaning oil filtration, the cleaned cleaning oil flows along the inner wall of the pressure storage cylinder into the oil filter box, is filtered by the fine mesh screen, enters the oil storage chamber, and then flows back to the oil storage tank through the return pipe to enter the next cleaning cycle;

[0022] S5, scrape off the cleaning oil remaining on the inner wall of the pressure storage cylinder. First, take the pressure storage cylinder out of the oil filter box, and then remove the sealing plug from the upper part of the pressure storage cylinder; then transfer the pressure storage cylinder to the support seat of the oil removal device, and then start the hydraulic pump to make the moving end of the hydraulic cylinder pass through the other end of the pressure storage cylinder, then turn off the hydraulic pump, and coaxially connect the oil removal plug to the end of the moving end of the hydraulic cylinder; finally, start the hydraulic pump, drive the hydraulic cylinder so that its moving end drives the oil removal plug to slide across the inner wall of the pressure storage cylinder, and scrape off the cleaning oil remaining on the inner wall of the pressure storage cylinder axially outward.

[0023] The beneficial effects of the present invention are:

[0024] 1) The pressure accumulator is cleaned by the cleaning device. The cleaning oil is sprayed into the pressure accumulator through the oil storage tank and the sealing plug to clean the inside of the pressure accumulator. The cleaning oil is filtered by the filter element of the oil filter box and then enters the oil storage tank, and then enters the next cycle of cleaning. The pressure accumulator can be repeatedly flushed multiple times to improve the cleanliness of the pressure accumulator. At the same time, the cleaning oil is automatically circulated through the pump on the oil storage tank, which improves the cleaning efficiency of the pressure accumulator.

[0025] 2) The cleaning oil remaining on the inner wall of the pressure accumulator after cleaning is removed by the oil removal device. The oil removal device uses a hydraulic pump as a power source. The hydraulic cylinder drives the oil removal plug to scrape the residual cleaning oil from one end to the other along the inner wall of the pressure accumulator. The oil removal efficiency is improved while the cleanliness of the inner wall of the pressure accumulator is improved, thereby meeting the sealing requirements in ultra-high voltage or ultra-high voltage circuit breakers. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 are perspective views of an embodiment, wherein (a) is a perspective view of a cleaning device; (b) is a perspective view of an oil removal device;

[0027] Figure 2 It is a cross-sectional view of the oil filter box;

[0028] Figure 3 A three-dimensional diagram of the sealing plug;

[0029] Figure 4 is a cross-sectional view of the sealing plug;

[0030] Figure 5 This is the connection diagram between the oil removal plug and the moving end of the hydraulic cylinder;

[0031] 10. Pressure storage cylinder; 1. Mounting frame; 2. Oil storage tank; 3. Oil filter tank; 4. Sealing plug; 5. Base; 6. Hydraulic cylinder; 7. Hydraulic pump; 8. Oil remover plug; 9. Support seat; 21. Oil outlet pipe; 31. Outer box body; 32. Inner box body; 33. Lifting ear; 34. Oil return pipe; 41. Oil injection part; 42. Connecting part; 43. Cover part; 44. Rotating part; 45. Oil inlet part; 46. Oil inlet pipe; 47. Lifting ring; 411. Oil injection hole; 421. Oil guide groove; 61. Rod end bearing; 81. Connecting assembly; 811. First connecting part; 812. Second connecting part; 813. Pin shaft. DETAILED DESCRIPTION

[0032] The following will further illustrate the technical means adopted to achieve the predetermined inventive objectives of the present invention in conjunction with the drawings in the embodiments of the present invention.

[0033] See also Figure 1 As shown, Figure 1 3D images of an embodiment of the present invention, wherein (a) is a 3D image of a cleaning device; (b) is a 3D image of an oil removal device.

[0034] A pressure storage cylinder internal cleaning system, characterized by comprising a cleaning device and an oil removal device;

[0035] See Figure 1 (a) The cleaning device includes a mounting frame 1, to which an oil reservoir 2 and an oil filter tank 3 are fixed. The outlet of the oil reservoir 2 is connected to a sealing plug 4 via an oil outlet pipe 21. Cleaning oil is delivered to the sealing plug 4 by a pump mounted on the oil reservoir 2. The upper portion of the sealing plug 4 is suspended by a lifting mechanism, and the lower portion is connected to the upper end of a pressure accumulator 10, which sprays cleaning oil into the sealing plug. The lower portion of the pressure accumulator 10 extends into the oil filter tank 3. The outlet of the oil filter tank 3 is connected to the oil reservoir 2 via an oil return pipe 34.

[0036] See Figure 3 and Figure 4 , Figure 3 A perspective view of the sealing plug 4; Figure 4 It is a cross-sectional view of the sealing plug 4.

[0037] The sealing plug 4 includes an oil spraying portion 41, a connecting portion 42, a cover portion 43, a rotating portion 44 and an oil inlet portion 45 which are arranged in sequence along the axial direction. An accommodating chamber extending from the oil inlet portion 45 to the oil spraying portion 41 is provided inside the sealing plug 4. The opening of the accommodating chamber is located at the oil inlet portion 45 and is connected to the oil outlet pipe 21 through an oil inlet pipe 46 connected thereto. The top of the rotating portion 44 is connected to the lifting machinery. The outer diameter of the cover portion 43 is larger than the inner diameter of the pressure storage cylinder 10. The outer periphery of the connecting portion 42 is connected to the inner wall of the pressure storage cylinder 10 through a thread. A plurality of oil spray holes 411 connected to the accommodating chamber are provided on the side wall of the oil spraying portion 41. Specifically, the axis of the oil spray hole 411 is perpendicular to the side wall of the oil spraying portion 41 and is connected to the accommodating chamber, and is evenly spaced along the side wall of the oil spraying portion 41.

[0038] See Figure 1 (b) The oil removal device includes a base 5, and a plurality of support seats 9 are arranged at intervals along the length direction at one end of the top of the base 5. The support seats 9 are used to support the pressure storage cylinder 10. A hydraulic cylinder 6 is arranged along its length direction at the other end of the base 5. The fixed end of the hydraulic cylinder 6 is connected to a hydraulic pump 7. The movable end can reciprocate through the interior of the pressure storage cylinder 10 under the drive of the hydraulic pump 7, and an oil removal plug 8 is detachably connected to the end. When the movable end of the hydraulic cylinder 6 retracts to the fixed end, the oil removal plug 8 is driven to scrape the oil on the inner wall of the pressure storage cylinder 10 along its axial direction.

[0039] Specifically, the oil removal plug 8 is connected to the connecting assembly 81, and the connecting assembly 81 is connected to the free end of the hydraulic cylinder 6 through the rod end bearing 61. Figure 5 As shown, the connecting assembly 81 includes a first connecting portion 811 and a second connecting portion 812 arranged along the axial direction. The first connecting portion 811 and the second connecting portion 812 are both circular shafts, and the outer ring end of the first connecting portion 811 is provided with a thread. The axial diameter of the second connecting portion 812 is larger than the axial diameter of the first connecting portion 811, and the end thereof away from the first connecting portion 811 is provided with an axially extending blind hole, and a pin hole is provided in the middle thereof that intersects and is perpendicular to the blind hole, and the pin hole passes through the radial direction of the second connecting portion 812. When connected to the de-oiling plug 8 and the rod-end bearing 61, the first connecting part 811 passes through the center hole inside the de-oiling plug 8 along the center axis of the de-oiling plug 8, and the end is connected to a nut, and the de-oiling plug 8 is fixed to the first connecting part 811 by the nut, and one end of the rod-end bearing 61 is inserted into the second connecting part 812, and then the pin shaft 813 is used to pass through the pin hole on the second connecting part 812 and the corresponding connecting hole on the rod-end bearing 61 in sequence, so as to hinge the connecting assembly 81 and the rod-end bearing 61. The purpose is to enable the de-oiling plug to rotate and achieve height adjustment, so that when the hydraulic cylinder and the pressure storage cylinder have height errors due to manufacturing and assembly errors, the de-oiling plug can normally pass through the pressure storage cylinder and slide in contact with its inner wall.

[0040] In addition, in order to enable the oil removal plug 8 to rotate when the free end of the hydraulic cylinder 6 moves along the axial direction of the inner arm of the pressure storage cylinder 10, thereby improving the scraping effect and reducing the axial resistance, the connecting piece is connected to the hydraulic cylinder 6 through a rod end bearing 61.

[0041] See Figure 2 , Figure 2 It is a cross-sectional view of the oil filter box 3.

[0042] According to a specific embodiment, the oil filter box 3 comprises an outer box 31 and an inner box 32, which are nested together. The inner box 32 is sealed to the top of the outer box 31, with side walls and a bottom spaced apart to form an oil storage chamber. The inner box 32 opens upward and communicates with the outside. A filter hole is provided at the bottom, communicating with the oil storage chamber, and a fine-mesh screen is located above the bottom. The oil storage chamber is connected to the oil tank 2 via an oil return pipe 34. Specifically, in one embodiment, the inner box 32 and the outer box 31 are barrel-shaped, and the filter holes are elongated and arranged in a fan-shaped pattern along the bottom axis of the inner box 32. The fine-mesh screen has a mesh size of 60-80, preferably 60.

[0043] Furthermore, two lifting ears 33 are symmetrically provided on the top of the oil filter box 3, and a removable upper cover is provided on the upper cover. The upper cover is annular, and its inner hole can pass through the pressure storage cylinder 10. The setting of the lifting ears 33 facilitates the installation of the oil filter box 3 on the mounting frame 1.

[0044] See Figure 1 (a) According to a specific embodiment, the mounting frame 1 is a stepped frame structure, including a bottom frame, a top of which is used to fix the oil storage tank 2, and an upper frame arranged above the bottom frame, the upper frame is higher than the top wall of the oil storage tank 2, and is used to fix the oil filter box 3, the inlet of the return oil pipe 34 is connected to the bottom of the oil filter box 3, and the outlet is connected to the top of the oil storage tank 2.

[0045] Specifically, it can be welded from square tubes. By setting up a stepped frame structure, the oil filter box 3 is fixed at a higher position than the oil storage tank 2. This facilitates the oil in the oil filter box 3 to flow back to the oil storage tank 2 by gravity, thereby reducing the number of times the pump that returns the oil in the oil filter box 3 to the oil storage tank 2 is used, reducing energy consumption and saving costs. In addition, the bottom of the bottom frame is equipped with multiple casters to facilitate the movement of the cleaning device.

[0046] See Figure 3 and Figure 4 According to one specific embodiment, the outer circumference of the connecting portion 42 is provided with multiple axially extending oil guide grooves 421. Multiple oil injection holes 411 are spaced apart at the bottom of the oil guide grooves 421, communicating with the accommodating cavity. Specifically, the oil guide grooves 421 are at the same height as the connecting portion 42. At least one, and preferably three, oil injection holes 411 are spaced apart along the height of the oil guide grooves 421. The axes of the oil injection holes 411 are perpendicular to the sidewalls of the connecting portion 42 and communicate with the accommodating cavity. The oil guide grooves 421 and the oil injection holes 411 therein are used to clean impurities from the threads at the connection between the pressure accumulator 10 and the sealing plug 4, thereby improving the cleanliness of the threads at the connection between the pressure accumulator 10 and the connecting portion 42, and thereby improving the overall cleanliness of the pressure accumulator 10.

[0047] The accommodating cavity of the sealing plug 4 is a stepped hole with a gradually increasing diameter, extending in depth along the central axis of the sealing plug 4. The pipe joint connected to its opening is a right-angle elbow. Two lifting rings 47 are provided, symmetrically arranged on either side of the pipe joint and greater in height than the pipe structure, for connection to lifting machinery. Multiple wrenches extending radially outward from the rotating portion 44 are evenly distributed around the circumference of the rotating portion 44. In one embodiment, four wrenches are evenly distributed around the circumference of the rotating portion 44, and the ends of the wrenches are chamfered.

[0048] See Figure 1 (b) According to one specific embodiment, at least one annular groove is axially defined around the outer periphery of degreasing plug 8 , within which is located a resilient O-ring. The outer diameter of the resilient O-ring mates with the inner wall of pressure accumulator 10 . Specifically, the resilient O-ring is a rubber O-ring, ensuring that degreasing plug 8 maintains contact with the inner wall of pressure accumulator 10 as it moves along the inner wall, thereby ensuring that the cleaning oil is completely removed.

[0049] Directions:

[0050] 1) Connect the sealing plug 4 to one end of the pressure storage cylinder 10 by turning a wrench to make the connecting portion 42 fit with the thread of the pressure storage cylinder 10 .

[0051] 2) Place the lower portion of the pressure accumulator 10, connected to the sealing plug 4, into the oil filter box 3. Specifically, use a lifting mechanism connected to the lifting ring 47 to lift the pressure accumulator 10 vertically. Then, move the pressure accumulator 10 so that its lower end is placed within the inner box 32 of the oil filter box 3, with the bottom approximately 5 cm from the bottom of the inner box 32. The lifting mechanism can be a beam crane, jib crane, or the like.

[0052] 3) Clean the pressure accumulator 10 with cleaning oil. Specifically, start the pump provided on the oil storage tank 2 to allow the cleaning oil to enter the plugging head through the oil outlet pipe 21, and then spray the cleaning oil onto the inner wall of the pressure accumulator 10 through the oil spray hole 411 of the plugging head to clean the inner arm of the pressure accumulator 10. In the specific implementation, kerosene is used as the cleaning oil.

[0053] 4) Cleaning oil filtration: The cleaned cleaning oil flows along the inner wall of the pressure accumulator 10 into the oil filter tank 3. Inside the oil filter tank 3, it is first filtered through a fine-mesh screen to remove impurities. After that, it flows through the filter holes at the bottom of the inner box 32 into the oil storage chamber between the outer box 31 and the inner box 32. It then flows back to the oil storage tank 2 through the return pipe and enters the next cleaning cycle. Specifically, the filtered cleaning oil in the oil filter tank 3 can be controlled by a return pump to flow into the oil storage tank 2, or it can be returned to the oil storage tank 2 by gravity, taking advantage of the height difference between the oil filter tank 3 and the oil storage tank 2.

[0054] 5) The pressure storage cylinder 10 is placed on the oil removal device to scrape off the cleaning oil remaining on the inner wall of the pressure storage cylinder 10. Specifically, the pressure storage cylinder 10 is first taken out of the oil filter box 3, and then the sealing plug 4 is removed from the upper part of the pressure storage cylinder 10. Then, it is transported to the support seat 9 of the oil removal device by a lifting machine. Then, the hydraulic pump 7 is started to extend the moving end of the hydraulic cylinder 6 toward the pressure storage cylinder 10 until the end of the moving end of the hydraulic cylinder 6 extends from the other end of the pressure storage cylinder 10. Then, the hydraulic pump 7 is turned off and the oil removal plug 8 is coaxially connected to the end of the moving end of the hydraulic cylinder 6. Finally, the hydraulic pump 7 is started to drive the moving end of the hydraulic cylinder 6 to move toward the initial position, driving the oil removal plug 8 to pass through the inside of the pressure storage cylinder 10. At the same time, the elastic O-ring on the oil removal plug 8 is always in sliding contact with the inner wall of the pressure storage cylinder 10, and the cleaning oil remaining on the inner wall of the pressure storage cylinder 10 is scraped off axially outward.

[0055] The above is a preferred embodiment of the present invention, but the present invention is not limited to the above embodiments and examples. Various changes, equivalent substitutions, improvements, etc. made within the scope of knowledge possessed by those skilled in the art without departing from the concept of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pressure storage cylinder internal cleaning system, characterized in that: Including cleaning device and degreasing device; The cleaning device comprises a mounting frame (1), an oil storage tank (2) and an oil filter tank (3) are fixed on the mounting frame, the outlet of the oil storage tank (2) is connected to the sealing plug (4) through an oil outlet pipe (21), and the cleaning oil is delivered to the sealing plug by a pump arranged on the oil storage tank, the upper part of the sealing plug is suspended by a lifting machine, the lower part is connected to the upper end of the pressure storage cylinder and sprays cleaning oil inwardly, the lower part of the pressure storage cylinder extends into the oil filter tank (3), and the outlet of the oil filter tank is connected to the oil storage tank (2) through an oil return pipe (34); The oil filter box (3) comprises an outer box body (31) and an inner box body (32) which are sleeved together. The inner box body is sealed and connected to the top of the outer box body. The side walls and the bottom are spaced apart from each other to form an oil storage chamber. The opening of the inner box body (32) faces upward and is in communication with the outside. A filter hole in communication with the oil storage chamber is provided at the bottom, and a fine mesh screen is provided above the bottom. The oil storage chamber is in communication with the oil storage tank (2) via an oil return pipe (34). Two lifting ears (33) are symmetrically provided on the top of the oil filter box (3), and an upper cover plate is removably covered on the top. The upper cover plate is annular, and its inner hole can pass through the pressure storage cylinder; The sealing plug (4) includes an oil injection portion (41), a connecting portion (42), a cover portion (43), a rotating portion (44) and an oil inlet portion (45) arranged in sequence along the axial direction, and an accommodating chamber extending from the oil inlet portion (45) to the oil injection portion (41) is provided therein, and the opening of the accommodating chamber is located at the oil inlet portion (45) and is connected to the oil outlet pipe (21) through an oil inlet pipe (46) connected thereto. The top of the rotating portion (44) is connected to the lifting machinery through a lifting ring (47). The outer diameter of the cover portion (43) is larger than the inner diameter of the pressure storage cylinder. The outer periphery of the connecting portion (42) is connected to the inner wall of the pressure storage cylinder through a thread. The side wall of the oil injection portion (41) is provided with a plurality of oil injection holes (411) connected to the accommodating chamber. A plurality of oil guide grooves (421) extending in the axial direction are provided on the outer periphery of the connecting portion (42), and a plurality of oil injection holes (411) communicating with the accommodating cavity are provided at intervals at the bottom of the oil guide grooves; The oil removal device comprises a base (5), a plurality of support seats (9) are arranged at intervals along the length direction at one end of the top of the base, and the support seats are used to support the pressure storage cylinder. A hydraulic cylinder (6) is arranged along the length direction of the other end of the base, and the fixed end of the hydraulic cylinder is connected to a hydraulic pump (7), and the movable end can reciprocate through the interior of the pressure storage cylinder under the drive of the hydraulic pump, and is detachably connected to an oil removal plug (8) at the end. When the movable end of the hydraulic cylinder (6) retracts to the fixed end, the oil removal plug (8) is driven to scrape the oil on the inner wall of the pressure storage cylinder along its axial direction.

2. The cleaning system according to claim 1, characterized in that The mesh number of the fine mesh screen is: 60-80.

3. The cleaning system according to claim 1, characterized in that The mounting frame (1) is a stepped frame structure, comprising a bottom frame, the top of which is used to fix the oil storage tank (2), and an upper frame arranged above the bottom frame, the upper frame being higher than the top wall of the oil storage tank (2) and being used to fix the oil filter box (3), the inlet of the oil return pipe (34) being connected to the bottom of the oil filter box (3), and the outlet being connected to the top of the oil storage tank (2).

4. The cleaning system according to claim 1, wherein: The accommodating cavity of the sealing plug (4) is a stepped hole with a gradually increasing diameter, and the depth extends along the central axis of the sealing plug (4), and the pipe joint connected to the opening thereof is a right-angle elbow.

5. The cleaning system according to claim 1, characterized in that Two lifting rings (47) are provided, symmetrically arranged on both sides of the pipe joint, and their height is greater than the height of the pipe joint; a plurality of wrenches are evenly distributed on the outer periphery of the rotating part (44), and their lengths extend radially outward along the rotating part (44).

6. The cleaning system according to claim 1, characterized in that At least one annular groove is provided on the outer periphery of the oil removal plug (8) along the axial direction, and an elastic O-ring is provided in the annular groove, and the outer diameter of the elastic O-ring matches the inner wall of the pressure storage cylinder.

7. A method for cleaning the interior of a pressure storage cylinder, characterized in that: The internal cleaning system of the pressure storage cylinder according to any one of claims 1 to 6 is implemented by the following steps: S1, connect the sealing plug to one end of the pressure storage cylinder; S2, placing the lower portion of the pressure accumulator connected to the sealing plug into the oil filter box, lifting the pressure accumulator vertically by connecting the lifting eye frame with a lifting machine, and then placing the lower end of the pressure accumulator into the inner box of the oil filter box; S3, cleaning the pressure accumulator with cleaning oil. The pump provided on the oil storage tank is started, so that the cleaning oil enters the sealing plug through the oil outlet pipe and is then sprayed onto the inner wall of the pressure accumulator through the oil spray hole of the sealing plug to clean the inside of the pressure accumulator. S4, cleaning oil filtration, the cleaned cleaning oil flows along the inner wall of the pressure storage cylinder into the oil filter box, is filtered by the fine mesh screen, enters the oil storage chamber, and then flows back to the oil storage tank through the return pipe to enter the next cleaning cycle; S5, scrape off the cleaning oil remaining on the inner wall of the pressure storage cylinder. First, take the pressure storage cylinder out of the oil filter box, and then remove the sealing plug from the upper part of the pressure storage cylinder; then transfer the pressure storage cylinder to the support seat of the oil removal device, and then start the hydraulic pump to make the moving end of the hydraulic cylinder pass through the other end of the pressure storage cylinder, then turn off the hydraulic pump, and coaxially connect the oil removal plug to the end of the moving end of the hydraulic cylinder; finally, start the hydraulic pump, drive the hydraulic cylinder so that its moving end drives the oil removal plug to slide across the inner wall of the pressure storage cylinder, and scrape off the cleaning oil remaining on the inner wall of the pressure storage cylinder axially outward.

Images