A petroleum extraction electro-hydraulic system cleanliness filtering device

Abstract

The present application relates to the technical field of filtering equipment, and particularly relates to a petroleum extraction electro-hydraulic system cleanliness filtering equipment, which comprises a box body, box doors are hingedly arranged on the front and back sides of the box body, a gear pump is installed at the bottom of the box body, a first filtering unit is arranged at the upper part of the right inner wall of the box body, a cooling unit in communication with the first filtering unit is arranged at the lower part of the right inner wall of the box body, the cooling unit is in communication with the gear pump through a confluence pipe, a conveying pipe is connected to the lower left part of the box body, and a second filtering unit is arranged in the box body. Four filter elements are arranged, valves are arranged on the liquid inlet pipes and liquid outlet pipes of the filter elements, the valves on the liquid inlet pipe and the liquid outlet pipe of one filter element are closed, the filter paper on the filter element can be replaced, the operation of replacing the filter paper is simple and time-saving, the remaining three filter elements continue to work, the filter paper can be quickly replaced without stopping the machine, the petroleum extraction electro-hydraulic system is continuously supplied with liquid, the continuous operation of the petroleum extraction electro-hydraulic system is ensured, and uninterrupted production is realized.

Description

Technical Field

[0001] This invention relates to the field of filtration equipment technology, and more particularly to a cleanliness filtration device for an electro-hydraulic system in oil extraction. Background Technology

[0002] An electro-hydraulic oil extraction system is a complex combination of equipment and technology specifically designed to extract oil from underground reservoirs. This system uses an electric motor to drive a hydraulic pump that generates high-pressure hydraulic fluid. Control valves and actuators (such as hydraulic cylinders or motors) convert this hydraulic energy into mechanical energy, which in turn drives devices such as sucker rods or screw pumps to extract the oil.

[0003] In electro-hydraulic systems for oil extraction, cleanliness is crucial for the system's normal operation and lifespan. Contamination of hydraulic oil can lead to wear and tear on system components, decreased efficiency, and even malfunctions. Therefore, using filtration equipment to maintain the cleanliness of the hydraulic oil is essential.

[0004] The most common types of filtration equipment for electro-hydraulic systems in oil extraction currently on the market include the following:

[0005] 1. Single filtration device: This type of device usually contains a single filtration unit. Although it has a simple structure, its filtration effect is limited and it cannot effectively remove impurities of all particle sizes.

[0006] 2. Multi-stage filtration devices: These devices consist of multiple filtration units connected in series, which can gradually remove impurities of different particle sizes, significantly improving the filtration effect. However, traditional multi-stage filtration devices have the problem of inconvenient filter replacement. When replacing the filter, it is often necessary to stop the machine and disassemble multiple parts, which is cumbersome and time-consuming, seriously affecting production efficiency. Summary of the Invention

[0007] The purpose of this invention is to provide a cleanliness filtration device for an electro-hydraulic system in oil extraction, which enables rapid replacement of the filter element without shutting down the system.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a cleanliness filtration device for an electro-hydraulic system in oil extraction, comprising a housing, with hinged doors on both the front and rear sides of the housing, a gear pump installed at the bottom of the housing, a first filtration unit on the upper part of the right inner wall of the housing for filtering large particulate impurities in the liquid, a cooling unit connected to the first filtration unit on the lower part of the right inner wall of the housing for cooling the liquid, the cooling unit being connected to the gear pump via a manifold, a conveying pipe connected to the lower left side of the housing, a second filtration unit within the housing, the second filtration unit comprising two mounting plates connected to the housing, each mounting plate having two filter elements installed on both sides for filtering small particulate impurities in the liquid, an inlet pipe connected to the lower part of the filter elements, the inlet pipe being connected to the gear pump via a branch pipe, a drain pipe connected to the bottom of the filter elements, the drain pipe being connected to the conveying pipe, and valves installed on both the inlet and drain pipes.

[0009] Preferably, the filter element includes a cylinder, a central tube, a plug, a hand-held block, filter paper, an upper chuck, a sealing strip, a support ring frame, and a lower chuck. The cylinder is mounted on a mounting plate, with an open top. A central tube for supporting the filter paper is installed in the middle of the bottom of the cylinder. The central tube has an inlet hole, a drain pipe connected to the bottom of the central tube, and an inlet pipe connected to the lower part of the cylinder. The filter paper is sleeved on the outside of the central tube and repeatedly folded around the central tube. A support ring frame for supporting the filter paper is provided inside the cylinder and is slidably sleeved on the outside of the filter paper. A lower chuck for supporting the filter paper is connected to the bottom of the support ring frame, and the filter paper is inserted into the lower chuck. A plug is threaded to the upper part of the inner wall of the cylinder, a hand-held block is connected to the top of the plug, and an upper chuck for supporting the filter paper is connected to the bottom of the plug, and the filter paper is inserted into the upper chuck. An annular sealing strip is connected to the top of the cylinder to seal the gap between the plug and the top of the cylinder.

[0010] Preferably, the first filtration unit includes a fixed cylinder connected to the upper part of the inner wall on the right side of the housing. An oil inlet pipe is connected to the top of the fixed cylinder, extending to the outside of the housing. A liquid collecting hopper is connected to the bottom of the fixed cylinder, and the hopper is connected to the cooling unit via a branch pipe. A flow sensor is installed on the branch pipe. An arc-shaped filter plate is connected to the lower part of the fixed cylinder. Semi-circular cylinders are bolted to the lower parts of the front and rear outer walls of the fixed cylinder. A reciprocating screw is rotatably connected to the middle of the fixed cylinder, with both ends extending to the outside of the fixed cylinder. A motor is installed on the front outer wall of the fixed cylinder, and the output shaft of the motor is connected to the reciprocating screw. An arc-shaped scraper is threaded onto the reciprocating screw. The arc-shaped scraper is located inside the arc-shaped filter plate and is in close contact with the arc-shaped filter plate. Arc-shaped grooves are opened on the front and rear side walls of the fixed cylinder and on the side where the two semi-circular cylinders are close to each other. The semi-circular cylinders are connected to the fixed cylinder through the arc-shaped grooves. Arc-shaped blocking plates are slidably connected to the front and rear sides of the reciprocating screw to block the arc-shaped grooves on the fixed cylinder. Two springs are sleeved on the reciprocating screw. The two ends of the springs abut against the arc-shaped blocking plate and the semi-circular cylinder on the same side, respectively. Through holes are spaced apart on the lower part of the front and rear side walls of the fixed cylinder and on the lower part of the side where the two semi-circular cylinders are close to each other.

[0011] Preferably, an arc-shaped flow divider plate located above the arc-shaped filter plate is connected inside the fixed cylinder to uniformly distribute the liquid downwards onto the arc-shaped filter plate.

[0012] Preferably, the cooling unit includes a connecting plate connected to the lower part of the inner wall on the right side of the housing, a frame connected to the connecting plate, fins installed at intervals inside the frame, and square tubes installed at intervals inside the frame. Each square tube is located between two adjacent fins, and the upper and lower ends of the square tubes extend out of the frame and communicate with branch pipes and manifolds. Fans are installed at intervals on the right side of the frame.

[0013] Preferably, the box is equipped with a liquid extraction mechanism, which includes a fixed plate connected to the box. Two cylinders are mounted on the fixed plate, one in front and one behind. The cylinders are located between the left and right cylinders. A piston rod is slidably connected inside the cylinder, and the top of the piston rod extends outside the cylinder. The bottom of each cylinder is connected to two liquid extraction pipes, one in the left and one in the right. A one-way liquid outlet pipe and a one-way return pipe are connected between the liquid extraction pipes and the cylinders on the same side. A partition plate located below the piston rod is connected to the lower part of the cylinder. The partition plate has two circular holes, one in the left and one in the right, which are aligned with the two liquid extraction pipes, respectively. A rotating shaft is rotatably connected to the bottom center of the cylinder. A sealing plate located below the partition plate is connected to the top of the rotating shaft. The sealing plate has two circular holes, one in the left and one in the right. Two indicator rods are connected to the lower part of the rotating shaft.

[0014] Preferably, the upper part of the outer wall of the cylinder is connected to a connecting tube with an open top and bottom. The connecting tube has an opening for taking out and putting in, and a magnet is connected to the top of the connecting tube. The hand-held block is made of iron.

[0015] Preferably, a rotating block is connected to the top of the piston rod, a support block for supporting the rotating block is connected to the magnet, and a spring is connected between the piston rod and the cylinder.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. By setting four filter elements and installing valves on the inlet and outlet pipes of the filter elements, the filter paper on the filter element can be replaced by closing the valves on the inlet and outlet pipes of one of the filter elements. The operation of replacing the filter paper is simple and time-saving, while the other three filter elements continue to work. This enables the filter paper to be replaced quickly without stopping the machine, ensuring a continuous supply of liquid to the oil extraction electro-hydraulic system and guaranteeing the continuous operation of the oil extraction electro-hydraulic system, thereby achieving uninterrupted production.

[0018] 2. The arc-shaped filter plate can remove large particulate impurities from the hydraulic oil. Through the cooperation of components such as flow sensor, motor, reciprocating screw, and arc-shaped scraper, the arc-shaped filter plate can be automatically cleaned, avoiding clogging and affecting filtration efficiency and effect. This ensures that the arc-shaped filter plate always maintains a high-efficiency working state, thereby maintaining excellent filtration efficiency and effect.

[0019] 3. The pumping mechanism can both extract the hydraulic oil from the cylinder to facilitate the replacement of the filter paper in the cylinder, and push the hydraulic oil back into the cylinder to ensure that the hydraulic oil is effectively and fully filtered by the filter paper. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This is a schematic diagram showing the installation of the first filter unit, cooling unit, and second filter unit of the present invention.

[0022] Figure 3 This is a schematic diagram showing the connection between the first filtration unit and the cooling unit of the present invention.

[0023] Figure 4 This is a cross-sectional view of the first filtering unit of the present invention.

[0024] Figure 5 This is an exploded view of the first filtering unit of the present invention.

[0025] Figure 6 This is a three-dimensional structural diagram of the cooling unit of the present invention. Figure 1 .

[0026] Figure 7 This is a three-dimensional structural diagram of the cooling unit of the present invention. Figure 2 .

[0027] Figure 8This is a three-dimensional structural diagram of the second filtration unit and the liquid extraction mechanism of the present invention.

[0028] Figure 9 This is a three-dimensional structural diagram of the filter element of the present invention.

[0029] Figure 10 This is a partial three-dimensional structural diagram of the filter element of the present invention.

[0030] Figure 11 This is an exploded view of the filter element of the present invention.

[0031] Figure 12 This is a three-dimensional structural diagram of the liquid extraction mechanism of the present invention. Figure 1 .

[0032] Figure 13 This is a three-dimensional structural diagram of the liquid extraction mechanism of the present invention. Figure 2 .

[0033] Figure 14 This is a partial three-dimensional structural diagram of the liquid extraction mechanism of the present invention.

[0034] In the diagram: 1-Box body, 2-Box door, 31-Fixed cylinder, 32-Oil inlet pipe, 33-Collection hopper, 34-Branch pipe, 35-Flow sensor, 36-Semi-circular cylinder, 37-Arc-shaped filter plate, 38-Motor, 39-Reciprocating screw, 310-Arc-shaped scraper, 311-Arc-shaped blocking plate, 312-Spring 1, 313-Arc-shaped groove, 314-Through hole, 41-Connecting plate, 42-Frame, 43-Square tube, 44-Fins, 45-Fan, 5-Gear pump, 51-Manifold, 52-Diverter pipe, 6-Transport pipe, 71-Mounting plate, 72-Filter element, 721-Cylinder, 722-Center pipe, 723- 724-Handheld block, 725-Filter paper, 726-Upper chuck, 727-Sealing strip, 728-Support ring frame, 729-Lower chuck, 73-Inlet pipe, 74-Drain pipe, 75-Valve, 81-Fixing plate, 82-Cylinder body, 83-Piston rod, 84-One-way outlet pipe, 85-One-way return pipe, 86-Suction pipe, 87-Baffle plate, 88-Round hole one, 89-Blocking plate, 810-Round hole two, 811-Rotating shaft, 812-Indicator rod, 91-Connecting cylinder, 92-Removal port, 93-Magnet, 101-Rotating block, 102-Support block, 103-Spring two, 11-Arc-shaped diverter plate. Detailed Implementation

[0035] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0036] See Figures 1-2 A cleanliness filtration device for an electro-hydraulic system in oil extraction includes a housing 1. Two doors 2 are hinged to the front and rear sides of the housing 1. A gear pump 5 is installed at the bottom of the housing 1. A first filtration unit is located on the upper part of the inner right wall of the housing 1 to filter large particulate impurities in the liquid. A cooling unit, connected to the first filtration unit, is located on the lower part of the inner right wall of the housing 1 to cool the liquid. The cooling unit is connected to the gear pump 5 via a manifold 51. A delivery pipe 6 is connected to the lower left side of the housing 1, with its left end extending outside the housing 1. A second filtration unit is located inside the housing 1 to filter small particulate impurities in the liquid. The second filtration unit is connected to the delivery pipe 6 and to the gear pump 5 via a branch pipe 52.

[0037] First, the first filtration unit is connected to the container storing hydraulic oil via an external pipeline. Then, the delivery pipe 6 is connected to the oil extraction electro-hydraulic system via another external pipeline. By controlling the gear pump 5, the hydraulic oil can be pumped. The hydraulic oil first flows through the first filtration unit to remove large particulate impurities. After the initial filtration, the hydraulic oil then flows through the cooling unit for cooling to ensure that the hydraulic oil is maintained at a suitable temperature. The cooled hydraulic oil then enters the second filtration unit through the diversion pipe 52 to further remove small particulate impurities, ensuring a high degree of cleanliness. The clean hydraulic oil then enters the delivery pipe 6 and is finally delivered to the oil extraction electro-hydraulic system.

[0038] See Figures 2-5The first filtration unit includes a fixed cylinder 31 connected to the upper part of the inner wall on the right side of the housing 1. An oil inlet pipe 32 is connected to the top of the fixed cylinder 31, and the top end of the oil inlet pipe 32 extends to the outside of the housing 1. A liquid collecting hopper 33 is connected to the bottom of the fixed cylinder 31. The liquid collecting hopper 33 is connected to the cooling unit through a branch pipe 34. A flow sensor 35 is installed on the branch pipe 34. An arc-shaped filter plate 37 is connected to the lower part of the inner part of the fixed cylinder 31. Semi-circular grooves are opened on the lower parts of the outer walls on both the front and rear sides of the fixed cylinder 31. Semi-circular cylinders 36 are engaged in both semi-circular grooves. A semi-circular cylinder 36 is bolted to a fixed cylinder 31. A reciprocating screw 39 is rotatably connected to the middle of the fixed cylinder 31. Both ends of the reciprocating screw 39 extend outside the fixed cylinder 31. A motor 38 is mounted on the front outer wall of the fixed cylinder 31. The output shaft of the motor 38 is connected to the reciprocating screw 39. An arc-shaped scraper 310 is threaded onto the reciprocating screw 39. The arc-shaped scraper 310 consists of an arc-shaped plate and a flat plate. The arc-shaped plate is threaded onto the reciprocating screw 39 and is located inside and tightly fitted to the arc-shaped filter plate 37. The plate is attached to the top of the arc-shaped plate, and the plate fits against the top of the arc-shaped filter plate 37 to prevent the arc-shaped scraper 310 from rotating and to ensure that the arc-shaped scraper 310 can move smoothly back and forth. The width of the plate is greater than that of the arc-shaped plate. Arc-shaped grooves 313 are opened on the front and rear side walls of the fixed cylinder 31 and on the side where the two semi-circular cylinders 36 are close to each other. The semi-circular cylinders 36 are connected to the fixed cylinder 31 through the arc-shaped grooves 313. Arc-shaped blocking plates 311 are slidably connected to the front and rear sides of the reciprocating screw 39 to seal the arc-shaped grooves on the fixed cylinder 31. 313, two springs 312 are fitted on the reciprocating screw 39. The springs 312 are located on the outside of the arc-shaped blocking plate 311. The two ends of the springs 312 abut against the arc-shaped blocking plate 311 and the semi-circular cylinder 36 on the same side. The tops of the two semi-circular cylinders 36 are respectively opened on the side that is far apart from each other, and U-shaped grooves matching the reciprocating screw 39 are opened. The lower part of the front and rear side walls of the fixed cylinder 31 and the lower part of the side that is close to each other of the two semi-circular cylinders 36 are respectively opened with through holes 314. The through holes 314 are located on the lower side of the arc-shaped groove 313.

[0039] The inlet pipe 32 is connected to the container storing hydraulic oil via an external pipeline. The hydraulic oil enters the fixed cylinder 31 through the inlet pipe 32. The hydraulic oil first flows through the arc-shaped filter plate 37 to remove large particles of impurities. The hydraulic oil after the initial filtration is then collected by the collection hopper 33 and then fed into the cooling unit for cooling through the branch pipe 34. When the flow sensor 35 detects that the flow rate of the branch pipe 34 is less than the preset value, the flow sensor 35 sends a signal to the controller (not shown in the figure, the controller is existing technology and will not be described in detail here). After receiving the signal, the controller controls the motor 38 to work. The motor 38 drives the reciprocating screw 39 to rotate, and the rotation of the reciprocating screw 39 causes the arc-shaped scraper 310 to move back and forth. The arc-shaped scraper 310 moves forward, pushing large particles of impurities on the arc-shaped filter plate 37 forward. When the flat plate on the arc-shaped scraper 310 contacts the front arc-shaped blocking plate 311, the arc-shaped scraper 310 continues to move forward and pushes the front arc-shaped blocking plate 311 into the front semi-circular cylinder 36 through its flat plate, and the front spring 312 is compressed accordingly. Since the width of the flat plate on the arc-shaped scraper 310 is greater than that of the arc-shaped plate, as the arc-shaped scraper 310 pushes the front arc-shaped blocking plate 311 forward, the impurities are located between the arc-shaped plate on the arc-shaped scraper 310 and the front arc-shaped blocking plate 311. Thus, after the front arc-shaped blocking plate 311 enters the front semi-circular cylinder 36, the arc-shaped scraper 310 continues to push the impurities into the front semi-circular cylinder 36. Under the action of its own gravity, the impurities fall to the bottom of the front semi-circular cylinder 36. The hydraulic oil pushed into the semi-circular cylinder 36 by the arc-shaped scraper 310 flows back to the fixed cylinder 31 through the through hole 314. Similarly, the backward movement of the arc-shaped scraper 310 pushes impurities on the arc-shaped filter plate 37 into the rear semi-circular cylinder 36, thus automatically cleaning the arc-shaped filter plate 37 and preventing clogging that could affect filtration efficiency and effectiveness. This ensures the arc-shaped filter plate 37 maintains a consistently high-efficiency working state, thereby maintaining excellent filtration efficiency and effectiveness. After the arc-shaped scraper 310 moves away from the arc-shaped blocking plate 311, the spring 312 resets it, pushing the arc-shaped blocking plate 311 back into the arc-shaped groove 313 on the fixed cylinder 31, resealing the arc-shaped groove 313 to prevent hydraulic oil leakage. After the arc-shaped filter plate 37 is cleaned, the flow rate of hydraulic oil through it will increase significantly. When the flow sensor 35 detects that the flow rate in the branch pipe 34 is greater than the preset value, the flow sensor 35 sends a signal to the controller, which then controls the motor 38 to shut down. Since the semi-circular cylinder 36 is bolted to the fixed cylinder 31, it is easy to remove the semi-circular cylinder 36 from the fixed cylinder 31 and pour out and clean the impurities inside the semi-circular cylinder 36.

[0040] See Figure 2 , Figure 6 and Figure 7The cooling unit includes two connecting plates 41 connected to the lower part of the inner wall on the right side of the housing 1. A frame 42 is connected between the left sides of the two connecting plates 41. Fins 44 are evenly spaced from front to back inside the frame 42. Square tubes 43 are evenly spaced from front to back inside the frame 42. Each square tube 43 is located between two adjacent fins 44. The upper and lower ends of the square tube 43 extend outside the frame 42 and are connected to the branch pipe 34 and the manifold 51. Two fans 45 are installed on the right side of the frame 42.

[0041] After initial filtration, the hydraulic oil is fed into the square pipe 43 through the branch pipe 34. The hydraulic oil is cooled by the fins 44. The operation of the fan 45 can provide air cooling for the fins 44, ensuring that the fins 44 always maintain efficient cooling performance, thereby guaranteeing the cooling effect of the hydraulic oil.

[0042] See Figure 2 , Figure 8 , Figure 9 , Figure 10 and Figure 11The second filtration unit includes two mounting plates 71 connected inside the housing 1. Each mounting plate 71 has two embedded filter elements 72, one front and one rear. Each filter element 72 includes a cylinder 721, a central tube 722, a plug 723, a hand-held block 724, filter paper 725, an upper chuck 726, a sealing strip 727, a support ring 728, and a lower chuck 729. The cylinder 721 is embedded in the mounting plate 71, with an open top. A central tube 722 for supporting the filter paper 725 is installed in the center of the bottom of the cylinder 721. The central tube 722 has a liquid inlet hole, and its bottom extends outside the cylinder 721. The filter paper 725 is slidably fitted onto the outside of the central tube 722. The filter paper 725 is repeatedly folded around the central tube 722. The surface of the filter paper 725 is coated with oil- and heat-resistant adhesive to maintain the distance between folds and prevent the filter paper 725 from bending. A support ring frame 728 is provided inside the cylinder 721 to support the filter paper 725. The support ring frame 728 includes six rings spaced apart from top to bottom. The rings slide around the filter paper 725. Four connecting rods are evenly spaced circumferentially at the bottom of each ring. V-shaped blocks for supporting the filter paper 725 are spaced circumferentially on the inner wall of each ring. The V-shaped folds on the filter paper 725 are inserted into the gaps between two adjacent V-shaped blocks. The V-shaped blocks support and limit the filter paper 725 to prevent bending. The filter paper 725 fails due to the folding and bending of the filter material. A lower chuck 729, supporting the filter paper 725, is connected between the bottom ends of the four connecting rods at the lowest point of the support ring frame 728. The top of the lower chuck 729 has V-shaped grooves spaced circumferentially. The filter paper 725 is inserted into the V-shaped grooves of the lower chuck 729. The upper part of the inner wall of the cylinder 721 has internal threads, and the plug 723 has external threads matching these internal threads. The plug 723 connects to the internal threads on the upper part of the inner wall of the cylinder 721 via its external threads. A hand-held block 724 is connected to the top of the plug 723, and an upper chuck 726, supporting the filter paper 725, is connected to the bottom of the plug 723. The bottom of the upper chuck 726 has V-shaped grooves spaced circumferentially, and the filter paper 725 is inserted into the V-shaped grooves of the upper chuck 726. Within the groove, the cooperation of the central tube 722, upper chuck 726, support ring frame 728, and lower chuck 729 effectively supports and limits the entire filter paper 725, preventing the filter paper 725 from bending or deforming and causing filtration failure, thereby ensuring that the filter paper 725 can efficiently filter impurities. The top of the cylinder 721 is connected to an annular sealing strip 727, which is used to seal the gap between the plug block 723 and the top of the cylinder 721 to prevent hydraulic oil from leaking from the top of the cylinder 721. The lower part of the cylinder 721 is connected to an inlet pipe 73, which is connected to the diverter pipe 52. The bottom of the central tube 722 is connected to a drain pipe 74, which is connected to the delivery pipe 6. Valves 75 are installed on both the inlet pipe 73 and the drain pipe 74.

[0043] After cooling, the hydraulic oil first flows into the distributor pipe 52, and then into the cylinder 721 through the inlet pipe 73. Small particulate impurities in the hydraulic oil are further removed by the filter paper 725. The cleaned hydraulic oil then enters the central pipe 722, and then is discharged into the delivery pipe 6 through the drain pipe 74. When the filter paper 725 needs to be replaced, taking the replacement of the filter paper 725 in the left front cylinder 721 as an example, first close the valve 75 on the liquid inlet pipe 73 and the liquid outlet pipe 74 on the left front cylinder 721. Then manually turn the left front hand block 724 to turn the left front block 723 out of the left front cylinder 721, thereby pulling the upper chuck 726 out of the cylinder 721 and disengaging it from the filter paper 725. Then pull the support ring frame 728 upward from the cylinder 721, and the lower chuck 729 moves out of the cylinder 721 along with the support ring frame 728 to push the filter paper 725 upward from the cylinder 721. Then pull the filter paper 725 out of the support ring frame 728 and insert the new filter paper 725 into the support ring frame 728 and the lower chuck 729. Next, the new filter paper 725 and support ring 728 are placed back into the cylinder 721. Then, the plug 723 is inserted back into the cylinder 721, and the upper chuck 726 is inserted onto the filter paper 725. Then, the hand block 724 is reversed to drive the plug 723 to reverse. The external thread on the plug 723 engages with the internal thread in the cylinder 721 to lock the plug 723, preventing the plug 723 from being dislodged from the cylinder 721 by hydraulic oil impact. Because the bottom of the upper chuck 726 has V-shaped grooves spaced circumferentially, when the plug 723 reverses, it drives the upper chuck 726 to move down along the filter paper 725 without squeezing or deforming the filter paper 725. When the upper chuck 726 follows the plug 723 to reverse, it pushes the filter paper 725 to reverse through its V-shaped grooves. The reverse rotation of the filter paper 725 pushes the support ring 728 and the lower chuck 729 to reverse. After the filter paper 725 is reinstalled into the cylinder 721, open the valves 75 on the inlet pipe 73 and the outlet pipe 74 to continue filtering the hydraulic oil. Repeat the above operation to replace the filter paper 725 in the remaining three cylinders 721 in sequence. In this way, the operation of replacing the filter paper 725 in this equipment is simple and time-saving, and it can quickly replace the filter paper 725 without stopping the machine, ensuring continuous liquid supply to the oil extraction electro-hydraulic system, ensuring the continuous operation of the oil extraction electro-hydraulic system, and thus achieving uninterrupted production.

[0044] See Figure 2 , Figure 8 , Figure 12 , Figure 13 and Figure 14The housing 1 is equipped with a liquid extraction mechanism, which includes a T-shaped fixing plate 81 connected to the inner wall of the left side of the housing 1. Two cylinders 82 are embedded in the T-shaped fixing plate 81, positioned between left and right cylindrical sections 721. A piston rod 83 is slidably connected inside the cylinder 82, with its tip extending outside the cylinder 82. Two extraction pipes 86 are connected to the bottom of each cylinder 82. A one-way outlet pipe 84 and a one-way return pipe 85 connect the extraction pipe 86 to the cylindrical section 721 on the same side. The return pipe 85 is located above the one-way outlet pipe 84. The lower part of the cylinder body 82 is connected to a partition plate 87 located below the piston rod 83. The partition plate 87 has two round holes 88 on the left and right sides, which are aligned with the two suction pipes 86 on the left and right sides respectively. The bottom center of the cylinder body 82 is rotatably connected to a rotating shaft 811. The top of the rotating shaft 811 is connected to a sealing plate 89 located below the partition plate 87. The sealing plate 89 has two round holes 810 on the left and right sides. The lower part of the rotating shaft 811 is connected to two indicator rods 812 on the left and right sides, which are located below the cylinder body 82.

[0045] After closing the valves 75 on the inlet pipe 73 and the outlet pipe 74, and before replacing the filter paper 725 in the cylinder 721, manually rotate the shaft 811 to drive the sealing plate 89 to rotate. When the second round hole 810 on the left side of the sealing plate 89 is aligned with the first round hole 88 on the left side of the suction pipe 86 and the partition plate 87, the piston rod 83 moves upward to draw hydraulic oil from the left cylinder 721. When the second round hole 810 on the right side of the sealing plate 89 is aligned with the first round hole 88 on the right side of the suction pipe 86 and the partition plate 87, the piston rod 83 moves upward to draw hydraulic oil from the right cylinder 721. The rotation of the shaft 811 drives the indicator rod 812 to rotate. When the left indicator rod 812 rotates and aligns with the left suction tube 86, it indicates that the second round hole 810 on the left side of the sealing plate 89 is aligned with the left suction tube 86 and the first round hole 88 on the left side of the partition plate 87. When the right indicator rod 812 rotates and aligns with the right suction tube 86, it indicates that the second round hole 810 on the right side of the sealing plate 89 is aligned with the right suction tube 86 and the first round hole 88 on the right side of the partition plate 87. The indicator rod 812 provides the operator with an intuitive and reliable reference. Moving the piston rod 83 upwards allows the hydraulic oil in the cylinder 721 to be drawn into the cylinder 82 through the one-way outlet pipe 84 and the suction pipe 86, facilitating the subsequent replacement of the filter paper 725 in the cylinder 721. After the filter paper 725 is replaced, moving the piston rod 83 downwards allows the hydraulic oil in the cylinder 82 to be pushed back into the cylinder 721 through the suction pipe 86 and the one-way return pipe 85, ensuring that the hydraulic oil is effectively and fully filtered by the filter paper 725.

[0046] See Figure 4An arc-shaped diverter plate 11 is connected between the inner walls of the front and rear sides of the fixed cylinder 31 and is located above the arc-shaped filter plate 37. A gap is left between the arc-shaped diverter plate 11 and the inner walls of the left and right sides of the fixed cylinder 31 for hydraulic oil to be discharged downward. The arc-shaped diverter plate 11 can divert the hydraulic oil, so that the hydraulic oil can flow evenly to the surface of the arc-shaped filter plate 37 for filtration. This ensures that the hydraulic oil is evenly distributed on the entire surface of the arc-shaped filter plate 37, avoiding excessive or insufficient local flow, thereby improving filtration efficiency and quality. In addition, the uniform distribution of hydraulic oil reduces the pressure difference between different parts of the arc-shaped filter plate 37, preventing deformation or damage to the arc-shaped filter plate 37 due to uneven pressure, thereby extending the service life of the arc-shaped filter plate 37.

[0047] See Figure 12 The upper part of the outer wall of the cylinder 721 is connected to a connecting cylinder 91 with an open top and bottom. The front and rear connecting cylinders 91 have openings 92 on the side that is far apart from each other. A magnet 93 is connected to the top of the connecting cylinder 91. The hand-held block 724 is made of iron.

[0048] After the block 723 is rotated out of the cylinder 721, the iron hand block 724 is placed at the bottom of the magnet 93. The magnetic force of the magnet 93 can attract the iron hand block 724, thereby locking the block 723 and the upper chuck 726 in the upper part of the connecting cylinder 91, so that the block 723 can be easily found and taken out and put back into the cylinder 721.

[0049] See Figure 8 and Figure 12 The piston rod 83 is connected to a rotating block 101 at its top end. A support block 102 for supporting the rotating block 101 is connected to the magnet 93. A second spring 103 is provided inside the cylinder body 82. The second spring 103 is sleeved on the piston rod 83, and the two ends of the second spring 103 abut against the piston rod 83 and the cylinder body 82, respectively.

[0050] The piston rod 83 moves upward, compressing the second spring 103. This upward movement of the piston rod 83 causes the rotating block 101 to move upward to the upper side of the support block 102. Then, the rotating block 101 rotates and locks onto the support block 102 to lock the piston rod 83, preventing it from being directly pushed downward by the second spring 103. After the filter paper 725 is replaced, the rotating block 101 is reversed and disengaged from the support block 102, releasing the lock on the piston rod 83. Under the reset action of the second spring 103, the piston rod 83 is pushed downward, pushing the hydraulic oil in the cylinder 82 back into the cylinder 721. There is no need for manual downward pushing of the piston rod 83. The reset force provided by the second spring 103 ensures that the distance and speed of the piston rod 83 downward are relatively consistent each time, maintaining the consistency and stability of the hydraulic oil flow.

[0051] The embodiments described above are merely preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications, improvements, and substitutions without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A cleanliness filtration device for an electro-hydraulic system in oil extraction, comprising a housing (1), with hinged doors (2) on both the front and rear sides of the housing (1), and a gear pump (5) installed at the bottom inside the housing (1), characterized in that, The upper part of the right inner wall of the housing (1) is provided with a first filter unit for filtering large particulate impurities in the liquid. The lower part of the right inner wall of the housing (1) is provided with a cooling unit connected to the first filter unit for cooling the liquid. The cooling unit is connected to the gear pump (5) through a manifold (51). The lower left side of the housing (1) is connected with a delivery pipe (6). The housing (1) is provided with a second filter unit. The second filter unit includes two mounting plates (71) connected to the left and right sides of the housing (1). Two filter elements (72) are installed on the two mounting plates (71) for filtering small particulate impurities in the liquid. The lower part of the filter element (72) is connected with an inlet pipe (73). The inlet pipe (73) is connected to the gear pump (5) through a diversion pipe (52). The bottom is connected to a drain pipe (74), which is connected to the delivery pipe (6). Valves (75) are installed on both the inlet pipe (73) and the drain pipe (74). The first filter unit includes a fixed cylinder (31) connected to the upper part of the inner wall on the right side of the box (1). The top of the fixed cylinder (31) is connected to an oil inlet pipe (32), which extends to the outside of the box (1). The bottom of the fixed cylinder (31) is connected to a liquid collection hopper (33), which is connected to the cooling unit through a branch pipe (34). A flow sensor (35) is installed on the branch pipe (34). An arc-shaped filter plate (37) is connected to the lower part of the fixed cylinder (31). The lower parts of the outer walls on both the front and rear sides of the fixed cylinder (31) are connected to a semi-circular cylinder (36) by bolts. A reciprocating screw (39) is rotatably connected to the middle of the fixed cylinder (31). Both ends of the reciprocating screw (39) extend outside the fixed cylinder (31). A motor (38) is installed on the outer wall of the front side of the fixed cylinder (31). The output shaft of the motor (38) is connected to the reciprocating screw (39). An arc-shaped scraper (310) is threaded onto the reciprocating screw (39). The arc-shaped scraper (310) consists of an arc-shaped plate and a flat plate. The width of the flat plate is greater than that of the arc-shaped plate. The arc-shaped plate is threaded onto the reciprocating screw (39). The arc-shaped plate is located inside the arc-shaped filter plate (37) and is in close contact with the arc-shaped filter plate (37). The flat plate is connected to the top of the arc-shaped plate. The flat plate is in close contact with the top of the arc-shaped filter plate (37) to prevent the arc-shaped scraper (310) from rotating and to ensure that the arc-shaped scraper (310) can... The fixed cylinder (31) moves smoothly back and forth. Arc grooves (313) are opened on the front and rear side walls of the fixed cylinder (31) and on the side of the two semi-circular cylinders (36) that are close to each other. The semi-circular cylinders (36) are connected to the fixed cylinder (31) through the arc grooves (313). Arc-shaped blocking plates (311) are slidably connected on the front and rear sides of the reciprocating screw (39) to block the arc grooves (313) on the fixed cylinder (31). Two springs (312) are sleeved on the reciprocating screw (39). The two ends of the springs (312) abut against the arc-shaped blocking plates (311) and the semi-circular cylinders (36) on the same side, respectively. Through holes (314) are spaced apart on the lower part of the front and rear side walls of the fixed cylinder (31) and the lower part of the side of the two semi-circular cylinders (36) that are close to each other.

2. The cleanliness filtration device for an electro-hydraulic system in oil extraction according to claim 1, characterized in that, The filter element (72) includes a cylinder (721), a central tube (722), a plug (723), a hand-held block (724), filter paper (725), an upper chuck (726), a sealing strip (727), a support ring frame (728), and a lower chuck (729). The cylinder (721) is mounted on the mounting plate (71). The top of the cylinder (721) is open. A central tube (722) for supporting the filter paper (725) is installed in the middle of the bottom of the cylinder (721). The central tube (722) has a liquid inlet hole. A drain pipe (74) is connected to the bottom of the central tube (722). A liquid inlet pipe (73) is connected to the lower part of the cylinder (721). The filter paper (725) is sleeved on the outside of the central tube (722). The filter paper (725) is repeatedly folded around the central tube (722). The cylinder (721) is provided with a support ring frame (728) for supporting filter paper (725). The support ring frame (728) is slidably sleeved on the outside of the filter paper (725). The bottom of the support ring frame (728) is connected to a lower chuck (729) for supporting filter paper (725). The filter paper (725) is inserted into the lower chuck (729). A plug (723) is threadedly connected to the upper part of the inner wall of the cylinder (721). A hand-held block (724) is connected to the top of the plug (723). An upper chuck (726) for supporting filter paper (725) is connected to the bottom of the plug (723). The filter paper (725) is inserted into the upper chuck (726). An annular sealing strip (727) is connected to the top of the cylinder (721) for sealing the gap between the plug (723) and the top of the cylinder (721).

3. The cleanliness filtration device for an electro-hydraulic system in oil extraction according to claim 2, characterized in that, The fixed cylinder (31) is connected to an arc-shaped diverter plate (11) located above the arc-shaped filter plate (37), which is used to evenly divert the liquid downwards to the arc-shaped filter plate (37).

4. The cleanliness filtration device for an electro-hydraulic system in oil extraction according to claim 3, characterized in that, The cooling unit includes a connecting plate (41) connected to the lower part of the inner wall on the right side of the housing (1). A frame (42) is connected to the connecting plate (41). Fins (44) are installed at intervals inside the frame (42). Square tubes (43) are installed at intervals inside the frame (42). Each square tube (43) is located between two adjacent fins (44). The upper and lower ends of the square tube (43) extend to the outside of the frame (42) and are connected to the branch pipe (34) and the manifold (51). Fans (45) are installed at intervals on the right side of the frame (42).

5. The cleanliness filtration device for an electro-hydraulic system in oil extraction according to claim 4, characterized in that, The housing (1) is equipped with a liquid extraction mechanism, which includes a fixed plate (81) connected inside the housing (1). Two cylinders (82) are installed on the fixed plate (81). The cylinders (82) are located between the left and right cylinders (721). A piston rod (83) is slidably connected inside the cylinder (82). The top of the piston rod (83) extends to the outside of the cylinder (82). The bottom of each cylinder (82) is connected to two liquid extraction pipes (86). A one-way liquid outlet pipe (84) and a one-way return pipe are connected between the liquid extraction pipe (86) and the cylinder (721) on the same side. The lower part of the cylinder (82) is connected to a partition (87) located below the piston rod (83). The partition (87) has two round holes (88) on the left and right sides, which are aligned with the two liquid suction tubes (86) on the left and right sides respectively. The bottom of the cylinder (82) is connected to a rotating shaft (811). The top of the rotating shaft (811) is connected to a sealing plate (89) located below the partition (87). The sealing plate (89) has two round holes (810) on the left and right sides. The lower part of the rotating shaft (811) is connected to two indicator rods (812).

6. The cleanliness filtration device for an electro-hydraulic system in oil extraction according to claim 5, characterized in that, The upper part of the outer wall of the cylinder (721) is connected to a connecting tube (91) with an open top and bottom. The connecting tube (91) has an opening (92) for taking out and putting in. A magnet (93) is connected to the top of the connecting tube (91). The hand-held block (724) is made of iron.

7. The cleanliness filtration device for an electro-hydraulic system in oil extraction according to claim 6, characterized in that, A rotating block (101) is connected to the top of the piston rod (83), and a support block (102) for supporting the rotating block (101) is connected to the magnet (93). A spring (103) is connected between the piston rod (83) and the cylinder (82).

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