Pumping unit gear oil purification, regeneration and skid-mounted integrated device

Abstract

The utility model relates to a pumping unit gear oil purification and regeneration skid-mounted integrated device in the technical field of lubricating oil repair equipment. The pumping unit gear oil purification and regeneration skid-mounted integrated device comprises a mounting box, a vacuum filter, a three-phase centrifugal machine, a precision filter press and a stirring tank, the vacuum filter, the three-phase centrifugal machine, the precision filter press and the stirring tank are arranged in the mounting box; a first oil outlet in the bottom of the stirring tank is connected with an oil inlet of the vacuum filter through a first oil outlet pipe; an oil outlet of the vacuum filter is connected with a first oil return port in the upper part of the stirring tank through a first oil return pipe; a second oil outlet in the bottom of the stirring tank is connected with an oil inlet of the three-phase centrifugal machine through a second oil outlet pipe; an oil outlet of the three-phase centrifugal machine is connected with a second oil return opening in the upper part of the stirring tank through a second oil return pipe; a third oil outlet in the bottom of the stirring tank is connected with an oil inlet of the precision filter press through a third oil outlet pipe and a gear pump; and an oil outlet of the precision filter press is connected with a third oil return port in the upper part of the stirring tank through a third oil return pipe. Therefore, the working efficiency of repairing the gear lubricating oil can be improved.

Description

Technical Field

[0001] The utility model relates to an integrated skid-mounted device for purifying and regenerating gear oil of a pumping unit, belonging to the technical field of lubricating oil repair equipment. Background Technique

[0002] The pumping unit is the most core equipment at the oil well site. Its overall shape is like a balance. The middle part of the walking beam is hinged to the top of the support through a middle bearing. During the operation of the walking beam, it reciprocates back and forth at a certain angle with the middle bearing as the fulcrum. The head end of the walking beam is connected with a pony head, and the pony head bears the pumping load. The lower end of the tail of the walking beam is connected with a cross beam through a tail shaft bearing seat. The axis of the cross beam is perpendicular to the axis of the walking beam. The front and rear ends of the cross beam are respectively hinged with connecting rods. Connecting rod lifting rings are respectively arranged at the lower ends of the two connecting rods. The two connecting rod lifting rings are respectively connected with the crank mechanism through crank pins and are provided with balance counterweight loads. The motor and the pumping unit reducer are jointly fixed on the driving base. The small pulley at the output end of the motor is connected with the large pulley at the input end of the pumping unit reducer through a pumping unit belt. The root of the crank is fixed at the output end of the pumping unit reducer.

[0003] During operation, the motor drives the pumping unit reducer to operate through the pumping unit belt. The output end of the pumping unit reducer drives the crank to rotate. The free end of the crank pulls the lower ends of the two connecting rods to make a circular motion. The upper ends of the two connecting rods drive the tail end of the walking beam to swing up and down through the cross beam. The pony head at the head end of the walking beam also moves up and down. The pony head drives the plunger of the downhole deep well pump to move up and down through the rope braid, polished rod and pumping rod, so as to continuously pump the crude oil in the well out of the wellbore.

[0004] Since the pumping unit works continuously in the wild, due to problems such as respiration and seal failure, the gear lubricating oil in the pumping unit reducer is easily polluted by dust, water vapor, etc., affecting the normal use of the pumping unit. Therefore, it is necessary to replace the gear lubricating oil. Among them, because the cost of replacing the gear lubricating oil is high, it is necessary to repair and use the gear lubricating oil to realize the recycling of the gear lubricating oil.

[0005] In the related technology, the gear lubricating oil to be repaired is introduced into a vacuum filter, and is connected to the vacuum filter through two connecting pipes of a mixing tank, so that the gear lubricating oil can circulate between the vacuum filter and the mixing tank to realize the cyclic vacuum filtration of the gear lubricating oil. The gear lubricating oil after vacuum filtration is stored in the mixing tank, and then the two connecting pipes of the mixing tank are connected to a three-phase centrifuge to realize the centrifugal separation and impurity removal of the gear lubricating oil. Finally, the clean gear lubricating oil after centrifugal separation is stored in the mixing tank, and then the two connecting pipes of the mixing tank are connected to a precision filter press to realize the further pressure filtration of the gear lubricating oil, and the gear lubricating oil after pressure filtration is stored in the mixing tank, thereby realizing the repair of the gear lubricating oil.

[0006] However, in practical applications, the vacuum filter, three-phase centrifuge, precision filter press, and mixing tank are first transported to the oilfield, and then the equipment is assembled. Among them, since the assembly and debugging of each equipment are cumbersome, and the connecting pipes of the mixing tank need to be disassembled and assembled multiple times to change the connection layout, which affects the working efficiency of repairing gear lubricating oil, improvement is needed.

[0007] The Chinese utility model patent with the publication number CN 218755627U discloses an on-site regeneration treatment device for pumping unit lubricating oil, including a heating tank. A waste oil suction pipe is fixedly connected to the top of the heating tank. The bottom of the heating tank is fixedly connected to a coarse filter tank through a connecting pipe. One side of the bottom of the coarse filter tank is fixedly connected to a vacuum buffer tank through a connecting pipe. A vacuum pump is fixedly connected to the vacuum buffer tank through a connecting pipe. One side of the vacuum buffer tank is fixedly connected to a fine filter tank through a connecting pipe. The bottom of the vacuum buffer tank is fixedly connected to a solid waste collection tank through a connecting pipe. The side wall of the fine filter tank is fixedly connected to an oil storage tank through a connecting pipe. The bottom of the oil storage tank is fixedly connected to a blending tank through a connecting pipe. The waste oil regeneration effect of this device is not good, and it needs to be used after secondary blending with a relatively large proportion of high-viscosity oil products.

[0008] For the extremely fine metal debris generated due to metal wear in gear oil, it is very difficult to remove it by filtration or centrifugation. In practice, a strong magnetic rod is usually left in the regenerated oil for more than several hours to magnetically adsorb and remove the metal debris. This operation has a good effect, but it takes too much time and affects the regeneration efficiency. Summary of the Utility Model

[0009] The purpose of this part is to outline some aspects of the embodiments of the present utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract of the specification and the name of the utility model of this application, and such simplifications or omissions shall not be used to limit the scope of the present utility model.

[0010] In view of the above and / or problems existing in the prior art, the present utility model is proposed.

[0011] The purpose of the present utility model is to overcome the problems existing in the prior art and provide an integrated skid-mounted device for purifying and regenerating pumping unit gear oil, which can improve the working efficiency of repairing gear lubricating oil and the quality of the regenerated lubricating oil.

[0012] To solve the above technical problems, the integrated skid-mounted device for purifying and regenerating the gear oil of the pumping unit of the present utility model includes an installation box, a vacuum filter, a three-phase centrifuge, a precision filter press, and a mixing tank; the installation box is hollow, and the vacuum filter, the three-phase centrifuge, the precision filter press, and the mixing tank are fixed in the installation box; the first oil outlet at the bottom of the mixing tank is connected to the oil inlet of the vacuum filter through a first oil pipe, and the oil outlet of the vacuum filter is connected to the first oil return port at the upper part of the mixing tank through a first oil return pipe; the second oil outlet at the bottom of the mixing tank is connected to the oil inlet of the three-phase centrifuge through a second oil pipe, and the oil outlet of the three-phase centrifuge is connected to the second oil return port at the upper part of the mixing tank through a second oil return pipe; the third oil outlet at the bottom of the mixing tank is connected to the oil inlet of the precision filter press through a third oil pipe, and the oil outlet of the precision filter press is connected to the third oil return port at the upper part of the mixing tank through a third oil return pipe.

[0013] By adopting the above technical solution, in practical applications, the vacuum filter is connected to the mixing tank through a first set of connecting pipes to achieve vacuum filtration of the gear lubricating oil, the three-phase centrifuge is connected to the mixing tank through a second set of connecting pipes to achieve centrifugation of the gear lubricating oil, and the precision filter press is connected to the mixing tank through a third set of connecting pipes to achieve filter pressing of the gear lubricating oil; thus, only by turning on the corresponding equipment can the work between each equipment and the mixing tank be realized, without changing the pipeline connection layout. At the same time, through the hoisting and transportation of the installation box, the overall transportation of the lubricating oil repair device can be realized, and there is no need to assemble each equipment after transportation, thereby effectively improving the working efficiency of repairing the gear lubricating oil.

[0014] As an improvement of the present utility model, the vacuum filter, the three-phase centrifuge, and the precision filter press are arranged at intervals along the circumferential direction of the mixing tank. The overall space of the installation box can be fully utilized to ensure that the size of the installation box is small, thus facilitating hoisting and transportation.

[0015] As a further improvement of the present utility model, an exhaust component is provided at the upper part of the installation box, and the exhaust component includes an exhaust fan. The exhaust fan is fixed to the upper part of the inner wall in the installation box, and the exhaust end is communicated with the outside of the installation box through a hole. By setting the exhaust fan, the exhaust gas in the installation box is discharged, solving the problem that the exhaust gas cannot be collected in an open construction site.

[0016] As a further improvement of the present utility model, the exhaust component further includes a gas filter box containing activated carbon. The gas filter box is arranged at the exhaust end of the exhaust fan and fixed to the outer wall of the installation box. The gas filter box filters the exhaust gas discharged by the exhaust fan to avoid polluting the air as much as possible.

[0017] As a further improvement of the present utility model, a camera for monitoring the working states of the vacuum filter, three-phase centrifuge, precision filter press, and stirring tank is installed on the top wall of the inner cavity of the installation box. By setting up the camera, real-time monitoring of each device in the installation box can be achieved, facilitating the understanding of the working conditions of each device.

[0018] As a further improvement of the present utility model, a ladder is provided on one side of the stirring tank. By setting up the ladder, the staff can reach the upper end of the stirring tank through the ladder, facilitating the observation of the lubricating oil in the stirring tank.

[0019] As a further improvement of the present utility model, an additive metering dispenser for quantitatively feeding lubricating oil additives into the stirring tank is provided above the stirring tank. It can improve the accuracy of additive input, further enhance the repair effect on gear lubricating oil, and improve the quality of lubricating oil.

[0020] As a further improvement of the present utility model, the vacuum filter includes a coarse filter cartridge, a medium filter cartridge, and a fine filter cartridge connected in series in sequence. The tops of the coarse filter cartridge, medium filter cartridge, and fine filter cartridge are respectively covered with filter cartridge top covers, and strong magnetic rods extending downward are respectively screwed at the centers of the inner end faces of the filter cartridge top covers.

[0021] As a further improvement of the present utility model, the vacuum filter, three-phase centrifuge, precision filter press, and stirring tank are all controlled by a controller, and the controller is located outside the installation box. Without the need for staff to enter the installation box for operation, the automatic switching of the oil circuit can be realized, facilitating the automatic and precise repair of gear lubricating oil.

[0022] Compared with the prior art, the present utility model has achieved the following beneficial effects: 1. In practical applications, only by turning on the corresponding devices can the work between each device and the stirring tank be realized. There is no need to change the pipeline connection layout. At the same time, through the hoisting and transportation of the installation box, the overall transportation of the lubricating oil repair device can be achieved, and there is no need to assemble each device after transportation, thus effectively improving the working efficiency of repairing lubricating oil;

[0023] 2. By setting up an exhaust assembly to discharge the waste gas in the installation box and filtering the waste gas discharged by the exhaust fan, the discharged waste gas is prevented from polluting the air;

[0024] 3. For metal debris that is difficult to separate by centrifugation, it can be removed by the strong magnetic rod during the flowing process, improving the repair effect of gear lubricating oil;

[0025] 4. By setting up an additive metering dispenser to feed lubricating oil additives into the stirring tank, the repair effect on gear lubricating oil is further improved. Description of the Drawings

[0026] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the attached drawings required for the description of the embodiments. Obviously, the attached drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other attached drawings can also be obtained based on these drawings. The attached drawings are only for reference and explanation, and are not used to limit the present utility model. Among them:

[0027] Figure 1 is the overall structural schematic diagram of the integrated device for purifying and regenerating the gear oil of the pumping unit in the embodiment of the present application;

[0028] Figure 2 is the internal structural schematic Figure 1 ;

[0029] Figure 3 is the internal structural schematic Figure 2 ;

[0030] Figure 4 is the structural schematic diagram of the strong magnetic rod connected below the filter cylinder top cover in the vacuum filter;

[0031] In the figure: 1. Installation box; 2. Vacuum filter; 2a. Coarse filter cylinder; 2b. Medium filter cylinder; 2c. Fine filter cylinder; 2d. Filter cylinder top cover; 2e. Strong magnetic rod; 3. Three-phase centrifuge; 4. Precision filter press; 5. Stirring tank; 51. First oil outlet pipe; 52. First oil return pipe; 53. Second oil outlet pipe; 54. Second oil return pipe; 55. Third oil outlet pipe; 56. Third oil return pipe; 6. Exhaust assembly; 61. Exhaust fan; 62. Gas filter box; 7. Camera; 8. Ladder; 9. Additive quantitative dispenser. Detailed implementation manners

[0032] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the following further elaborates the present utility model in conjunction with specific illustrations. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used in the description of the present utility model in this specification are only for the purpose of describing specific embodiments, and are not intended to limit the present utility model.

[0034] Such as Figures 1 to 3As shown in the figure, the integrated skid-mounted device for purifying and regenerating the gear oil of the pumping unit of the present utility model includes an installation box 1, a vacuum filter 2, a three-phase centrifuge 3, a precision filter press 4, and a mixing tank 5. The installation box 1 is arranged in the shape of a rectangular box, and the inside of the installation box 1 is hollow. The vacuum filter 2, the three-phase centrifuge 3, the precision filter press 4, and the mixing tank 5 are all fixedly connected in the installation box 1.

[0035] Among them, the first oil outlet at the bottom of the mixing tank 5 is connected to the oil inlet of the vacuum filter 2 through the first oil outlet pipe 51, and the oil outlet of the vacuum filter 2 is connected to the first oil return port at the upper part of the mixing tank 5 through the first oil return pipe 52.

[0036] The second oil outlet at the bottom of the mixing tank 5 is connected to the oil inlet of the three-phase centrifuge 3 through the second oil outlet pipe 53, and the oil outlet of the three-phase centrifuge 3 is connected to the second oil return port at the upper part of the mixing tank 5 through the second oil return pipe 54.

[0037] The third oil outlet at the bottom of the mixing tank 5 is connected to the oil inlet of the precision filter press 4 through the third oil outlet pipe 55 and the gear pump 4a, and the oil outlet of the precision filter press 4 is connected to the third oil return port at the upper part of the mixing tank 5 through the third oil return pipe 56.

[0038] The first oil outlet pipe 51, the first oil return pipe 52, the second oil outlet pipe 53, the second oil return pipe 54, the third oil outlet pipe 55, and the third oil return pipe 56 are all hard pipes.

[0039] The waste oil in the mixing tank 5 enters the vacuum filter 2 through the first oil outlet pipe 51, and after vacuum filtration, it flows back into the mixing tank 5 through the first oil return pipe 52. By flowing through the vacuum filter 2 for multiple cycles in this way, the primary impurity removal of the gear lubricating oil is fully realized. After the primary impurity removal is completed, the vacuum filter 2 is closed, and the gear lubricating oil after the primary impurity removal is still stored in the mixing tank 5.

[0040] As Figures 2 to 4 shown, the vacuum filter 2 includes a coarse filter cartridge 2a, a medium filter cartridge 2b, and a fine filter cartridge 2c connected in series in sequence. The tops of the coarse filter cartridge 2a, the medium filter cartridge 2b, and the fine filter cartridge 2c are respectively covered with filter cartridge top covers 2d. A nut is welded at the center of the inner end face of each filter cartridge top cover 2d. The strong magnetic rod 2e extends along the center line of the filter cartridge, and the upper end is screwed into the nut below the filter cartridge top cover 2d through a screw rod. A hexagonal head is provided at the upper part of the strong magnetic rod 2e to facilitate the disassembly or installation of the strong magnetic rod 2e. The waste oil flows through the filter elements of the coarse filter cartridge 2a, the medium filter cartridge 2b, and the fine filter cartridge 2c in sequence in the vacuum filter 2, and impurities of their respective particle sizes are intercepted step by step from coarse to fine. For very fine metal chips, they are attracted and removed by the strong magnetic rod 2e during the flow process. By regularly opening the filter cartridge top covers 2d of the coarse filter cartridge 2a, the medium filter cartridge 2b, and the fine filter cartridge 2c, the metal chips magnetically adsorbed on the outer periphery of the strong magnetic rod 2e can be directly removed.

[0041] After the first-stage impurity removal, the three-phase centrifuge 3 is started, and the gear lubricating oil in the mixing tank 5 flows out through the second oil outlet pipe 53 and enters the three-phase centrifuge 3 for centrifugal separation. The gear lubricating oil after centrifugal separation and impurity removal flows back to the mixing tank 5 through the second oil return pipe 54. In this way, it flows through the three-phase centrifuge 3 for multiple cycles to fully realize the second-stage impurity removal of the gear lubricating oil, and then the three-phase centrifuge 3 is closed, and the gear lubricating oil after the second-stage impurity removal is stored in the mixing tank 5.

[0042] Finally, the precision filter press 4 is started, and the gear lubricating oil after secondary impurity removal flows out through the third oil outlet pipe 55 and enters the precision filter press 4 for precision filtration. The gear lubricating oil after precision filtration and impurity removal flows back to the mixing tank 5 through the third oil return pipe 56. In this way, the gear lubricating oil is fully removed from the gear lubricating oil after multiple cycles through the precision filter press 4. The gear lubricating oil after the tertiary impurity removal is stored in the mixing tank 5, thereby completing the repair of the gear lubricating oil.

[0043] In this process, it is only necessary to turn on the corresponding equipment to realize the work between each device and the mixing tank without changing the pipeline connection layout. At the same time, by hoisting and transporting the installation box 1, the overall transportation of the lubricating oil repair device can be realized, and there is no need to assemble each device after transportation, that is, it can be used after powering on after the transportation is completed, which greatly reduces the time for assembly and debugging, thereby effectively improving the work efficiency of repairing gear lubricating oil. In addition, each device works in the installation box 1, which can reduce the impact of dust and can minimize the leakage of gear lubricating oil to the outside of the installation box 1 to ensure safe and environmentally friendly work.

[0044] In some embodiments, the vacuum filter 2, the three-phase centrifuge 3 and the precision filter press 4 are arranged at intervals along the circumference of the stirring tank to fully utilize the overall space of the installation box 1, so as to ensure that the size of the installation box 1 is small, thereby facilitating lifting and transportation. In addition, it is convenient to connect and arrange each group of connecting pipes with the stirring tank.

[0045] Reference Figure 1 and Figure 3 In some embodiments, the lubricating oil repair device also includes an exhaust component 6, the exhaust component 6 includes an exhaust fan 61, the exhaust fan 61 is fixedly connected to the installation box 1, and the exhaust fan 61 is connected to the outside of the installation box 1. When the exhaust fan 61 is working, it can discharge the exhaust gas in the installation box 1 to the outside of the installation box 1.

[0046] In some embodiments, the exhaust assembly 6 also includes a gas filter box 62, which is fixedly connected to the exhaust end of the exhaust fan 61. The gas filter box 62 contains activated carbon to filter the exhaust gas discharged by the exhaust fan 61 to minimize the exhaust gas from polluting the air.

[0047] Reference Figure 3, in some embodiments, the lubricating oil repair device further includes a camera 7. The camera 7 is installed on the top wall of the installation box 1 and is connected to a terminal device, such as a computer, a tablet, etc., so as to transmit the working image in the installation box 1 to the terminal device. The staff can observe the working status of each device in the installation box 1 by watching the terminal device.

[0048] In some embodiments, the lubricating oil repair device further includes a ladder 8. The ladder 8 is placed in the installation box 1 and is located on one side of the mixing tank. The staff moves to the upper end of the mixing tank through the ladder 8 to facilitate the observation of the lubricating oil in the mixing tank.

[0049] In some embodiments, the lubricating oil repair device further includes an additive metering dispenser 9. The additive metering dispenser 9 is fixedly connected to the upper end of the mixing tank, and the lubricating oil additive is stored in the additive metering dispenser 9. After the gear lubricating oil is pressure-filtered, the additive metering dispenser 9 injects the lubricating oil additive into the mixing tank to improve the repair effect on the gear lubricating oil.

[0050] In some embodiments, the lubricating oil repair device further includes a controller (not shown in the figure). The controller is electrically connected to the vacuum filter 2, the three-phase centrifuge 3, and the precision filter press 4. The controller is located outside the installation box 1. By means of the controller, the operation of the vacuum filter 2, the three-phase centrifuge 3, and the precision filter press 4 can be controlled, and there is no need for the staff to enter the installation box 1 for operation, thus facilitating the repair of the gear lubricating oil. At the same time, the controller is also electrically connected to the additive metering dispenser 9, making the amount of the lubricating oil additive injected by the additive metering dispenser 9 more accurate and further improving the repair effect on the gear lubricating oil.

[0051] The implementation principle of this embodiment is as follows: In practical applications, the gear lubricating oil to be repaired is transported to the vacuum filter 2. The vacuum filter 2 is started, and the gear lubricating oil circulates between the vacuum filter 2 and the mixing tank to fully vacuum-filter the gear lubricating oil, and the gear lubricating oil is stored in the mixing tank. Then, the vacuum filter 2 is turned off and the three-phase centrifuge 3 is started. The gear lubricating oil circulates between the three-phase centrifuge 3 and the mixing tank to fully centrifuge the gear lubricating oil, and the gear lubricating oil is stored in the mixing tank. Finally, the three-phase centrifuge 3 is turned off and the precision filter press 4 is started. The gear lubricating oil circulates between the precision filter press 4 and the mixing tank to fully pressure-filter the gear lubricating oil, and the gear lubricating oil is stored in the mixing tank to complete the repair of the gear lubricating oil.

[0052] In this process, it is only necessary to turn on the corresponding equipment to realize the work between each device and the mixing tank without changing the pipeline connection layout. At the same time, by hoisting and transporting the installation box 1, the overall transportation of the lubricating oil repair device can be realized, and there is no need to assemble each device after transportation, that is, it can be used after powering on after the transportation is completed, which greatly reduces the time for assembly and debugging, thereby effectively improving the work efficiency of repairing gear lubricating oil. In addition, each device works in the installation box 1, which can reduce the impact of dust and can minimize the leakage of gear lubricating oil to the outside of the installation box 1 to ensure safety and environmental protection.

[0053] The above description is only the preferred feasible embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model, but does not limit the scope of patent protection of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments. In addition to the above embodiments, the utility model can also have other implementation methods without departing from the spirit and scope of the utility model. The utility model will also have various changes and improvements. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents. The technical features not described in the utility model can be achieved by or using existing technologies, which will not be repeated here.

Claims

1. An integrated skid-mounted device for purifying and regenerating the gear oil of a pumping unit, characterized in that, It includes an installation box (1), a vacuum filter (2), a three-phase centrifuge (3), a precision filter press (4) and a mixing tank (5); the installation box (1) is hollow, and the vacuum filter (2), the three-phase centrifuge (3), the precision filter press (4) and the mixing tank (5) are fixed in the installation box (1); the first oil outlet at the bottom of the mixing tank (5) is connected to the oil inlet of the vacuum filter (2) through a first oil outlet pipe (51), and the oil outlet of the vacuum filter (2) is connected to the first oil return port at the upper part of the mixing tank (5) through a first oil return pipe (52); the second oil outlet at the bottom of the mixing tank (5) is connected to the oil inlet of the three-phase centrifuge (3) through a second oil outlet pipe (53), and the oil outlet of the three-phase centrifuge (3) is connected to the second oil return port at the upper part of the mixing tank (5) through a second oil return pipe (54); the third oil outlet at the bottom of the mixing tank (5) is connected to the oil inlet of the precision filter press (4) through a third oil outlet pipe (55) and a gear pump (4a), and the oil outlet of the precision filter press (4) is connected to the third oil return port at the upper part of the mixing tank (5) through a third oil return pipe (56).

2. The integrated skid-mounted device for purifying and regenerating the gear oil of the pumping unit according to claim 1, characterized in that The vacuum filter (2), the three-phase centrifuge (3) and the precision filter press (4) are arranged at intervals along the circumferential direction of the mixing tank (5).

3. The integrated skid-mounted device for purifying and regenerating the gear oil of the pumping unit according to claim 1, characterized in that, An exhaust assembly (6) is provided at the upper part of the installation box (1), and the exhaust assembly (6) includes an exhaust fan (61), the exhaust fan (61) is fixed to the upper part of the inner wall in the installation box (1) and the exhaust end is communicated with the outside of the installation box (1) through a hole.

4. The integrated skid-mounted device for purifying and regenerating the gear oil of a pumping unit according to claim 3, characterized in that, The exhaust assembly (6) further includes a gas filter box (62) containing activated carbon, and the gas filter box (62) is arranged at the exhaust end of the exhaust fan (61) and fixed to the outer wall of the installation box (1).

5. The integrated skid-mounted device for purifying and regenerating the gear oil of the pumping unit according to claim 1, wherein A camera (7) for monitoring the working states of the vacuum filter (2), the three-phase centrifuge (3), the precision filter press (4) and the mixing tank (5) is installed on the top wall of the inner cavity of the installation box (1).

6. The integrated skid-mounted device for purifying and regenerating the gear oil of the pumping unit according to claim 1, wherein A step (8) is provided on one side of the mixing tank (5).

7. The integrated skid-mounted device for purifying and regenerating the gear oil of the pumping unit according to claim 1, characterized in that, An additive metering dispenser (9) for quantitatively dispensing lubricating oil additives into the mixing tank (5) is provided above the mixing tank (5).

8. The integrated skid-mounted device for purifying and regenerating the gear oil of the pumping unit according to claim 1, characterized in that, The vacuum filter (2) includes a coarse filter cartridge (2a), a medium filter cartridge (2b) and a fine filter cartridge (2c) connected in series in sequence. The tops of the coarse filter cartridge (2a), the medium filter cartridge (2b) and the fine filter cartridge (2c) are respectively covered with filter cartridge top covers (2d), and strong magnetic rods (2e) extending downward are respectively screwed at the centers of the inner end faces of the filter cartridge top covers (2d).

9. The integrated device for purifying and regenerating the gear oil of a pumping unit according to any one of claims 1 to 8, characterized in that, The vacuum filter (2), the three-phase centrifuge (3), the precision filter press (4) and the mixing tank (5) are all controlled by a controller, and the controller is located outside the installation box (1).

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