Online filter cleaning device and application pipeline thereof

Abstract

The utility model discloses an on-line type filter cleaning device and an application pipeline thereof, the on-line type filter cleaning device comprises a filter cartridge, an oil inlet pipe and an oil outlet pipe are arranged on the cartridge wall of the filter cartridge, a filter screen for separating the oil inlet pipe from the oil outlet pipe is arranged in the filter cartridge, the on-line type filter cleaning device further comprises a cleaning assembly, and the cleaning assembly comprises a cleaning pipe and a cleaning head; the lower end of the cleaning pipe is communicated with the upper end of the cleaning head, a sealing plate is arranged at the upper end of the filter cartridge, the cleaning pipe penetrates through the sealing plate, and the cleaning head is inserted into the filter cartridge. According to the utility model, online cleaning of the filter is realized, and environmental pollution and quality reduction of the filter screen caused by disassembly of the filter screen are avoided; and high-pressure flushing of the filter screen is realized through a rotatable special cleaning device mounted in the filter.

Description

Technical Field

[0001] The utility model relates to the technical field of filter screen cleaning, in particular to an online filter cleaning device and an application pipeline thereof. Background Art

[0002] Most of the inlet pipes of pumps, flow meters and other equipment in oil and gas gathering and transportation pipelines are equipped with filters. A filter is installed inside the filter to filter out large particles of impurities in the conveying medium to prevent them from entering the operating equipment and causing damage to the equipment or affecting the metering accuracy. The filter is mostly in the form of a basket metal filter. The diameter and mesh number of the filter vary depending on the size of the pipe network. After the filter has been running for a period of time, a large amount of impurities will accumulate on the filter. When the impurities accumulate to a certain extent on the filter, the filter mesh will be blocked, resulting in an increase in the pressure difference at both ends of the filter and a decrease in the inlet pressure, affecting the normal operation of the equipment. At this time, the filter needs to be cleaned.

[0003] There is a lack of special cleaning methods for pipelines that transport crude oil or oil-water mixtures. When the filter screen of the crude oil pipeline is clogged, it is mostly some flocs that are difficult to clean using traditional cleaning methods. The usual practice is to stop the equipment, open the filter, take out the filter screen, clean the impurities on it, and then install it.

[0004] The disadvantages of the existing technology are: when cleaning some units with a large number of filters, there is a large workload, and the cleaning is cumbersome and delays production; due to the high content of mechanical impurities in the conveying medium, some filter screens are seriously blocked and the cleaning frequency is relatively frequent; the cleaning of the filter requires stopping the equipment, opening the top cover of the filter, taking out the filter screen and then cleaning it, which is a large workload and has a great impact on normal production; the cleaning of the filter screen involves illegal burning, which brings certain environmental risks and shortens the life of the filter screen.

[0005] Publication (Announcement) No.: CN212347894U discloses a stirring device for a jacketed basket filter, which is composed of a reduction motor, a coupling, two fixed brackets, a bearing seat, a bearing, at least one o-ring, a stirring rod, and a paddle. The micro reduction motor is fixed on the bearing seat through two fixed brackets, the bearing seat is installed on the cover plate of the jacketed basket filter, and the bearing and o-ring are installed in the bearing seat. The output shaft of the reduction motor is connected to one end of the stirring rod through a coupling, and the other end of the stirring rod passes through the bearing, the o-ring and the through hole in the middle of the cover plate of the jacketed basket filter. The bottom of the stirring rod is equipped with a paddle, and the stirring rod and the paddle are located inside the basket filter. When the power supply of the micro reduction motor is turned on, the micro reduction motor starts to rotate. This prior art has the characteristics of high safety in use, simple design, easy operation and maintenance, reduced or no need to clean the filter, reduced labor intensity and reduced safety accidents.

[0006] This prior art achieves direct cleaning, but the cleaning effect is not as good as that of the present invention.

[0007] Publication (Announcement) No.: CN202778063U discloses a new type of filter for long-distance pipelines of refined oil. It includes a cylinder, an inlet, an outlet, a filter frame, a sewage outlet, an exhaust pipe, and a valve. The filter frame is inverted and installed in the cylinder. Its cross section is circular, the inlet is lower than the outlet, and a slag outlet is set at the bottom of the cylinder. The cross section of the filter frame can also be designed to be arched, and a baffle that can change the flow direction is installed in the cylinder. At this time, the inlet and the outlet are on the same horizontal plane. A quick opening device is installed above the cylinder. Due to the use of an inverted blue filter frame, larger particles of rust naturally settle to the bottom. The filter frame can be reversely flushed using the outlet medium without removing the filter frame, and the slag can be directly discharged at the bottom, making maintenance and cleaning simple and easy, extending the service life of the filter screen, improving the filtering effect, and ensuring the normal use of other equipment in the station and the quality of oil products. Due to the low-in and high-out form, the flow direction of the liquid is completely changed, so that all the filtering areas of the filter screen can fully exert the filtering function, and the phenomenon of local blockage of the filter screen is completely avoided.

[0008] This prior art achieves direct cleaning, but the cleaning effect is not as good as that of the present invention.

[0009] Publication (Announcement) No.: CN206642453U discloses a fluorine-lined blue filter, which includes a valve body, a valve cover, a locking mechanism, a filter cartridge, and a valve body lining. The valve body is provided with a valve cavity inside, and a filter cartridge adapted thereto is provided in the valve cavity. The inner wall of the valve cavity is provided with a valve body lining. The valve body and the valve cover are provided with mutually matching locking mechanisms. The valve body and the valve cover are mutually hinged through the locking mechanism. The locking mechanism includes mutually matching bracket I, bracket II, precision rivets, locking hooks, locking arms, locking holes, handles, locking holes and locking pins. The handle and bracket II are hinged through precision rivets. The ends of the locking arms correspond to the supporting arms on the handle and are rotatably connected through the locking pins. The locking arms and the locking pins are fixedly connected by means of hexagonal bolts. The bracket I is provided with locking holes corresponding to the locking arms. The fluorine-lined blue filter has a simple and reasonable structure, strong corrosion resistance, practicality and simplicity, convenient cleaning, safety and reliability, and is easy to promote.

[0010] The filter screen needs to be taken out and cleaned, which is time-consuming and laborious.

[0011] In short, the technical solutions of the above-disclosed technologies, the technical problems to be solved and the beneficial effects produced are all different from the present utility model. Regarding more technical features, technical problems to be solved and the beneficial effects of the present utility model, there is no technical inspiration in the above-disclosed technical documents. Utility Model Content

[0012] In view of the above-mentioned defects existing in the prior art, the purpose of the utility model is to provide an online filter cleaning device and its application pipeline, so as to avoid the problem of reduced strength of the filter caused by illegal burning during the filter cleaning process; avoid the problem of environmental pollution caused by waste liquid formed by flushing the filter with high-pressure water or steam; reduce the cleaning cost and avoid the problem of excessively high cleaning cost; and solve the problems of repetitive work and heavy workload for employees caused by cleaning the filter.

[0013] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0014] An online filter cleaning device comprises a filter cartridge, wherein an oil inlet pipe and an oil outlet pipe are arranged on the filter cartridge wall, and a filter screen is arranged inside the filter cartridge to separate the oil inlet pipe from the oil outlet pipe;

[0015] Also included is a cleaning assembly, which includes a cleaning pipe and a cleaning head;

[0016] The lower end of the cleaning pipe is connected to the upper end of the cleaning head, and a sealing plate is arranged at the upper end of the filter cartridge. The cleaning pipe passes through the sealing plate, and the cleaning head is inserted into the filter cartridge.

[0017] The oil inlet pipe and the oil outlet pipe are at the same distance from the bottom of the cylinder; a sewage pipe is arranged at the lower end of the cylinder wall of the filter cylinder, and the sewage pipe is below the oil outlet pipe;

[0018] The filter screen is a basket type filter screen with an oblique opening on the top and a short mesh wall and a long mesh wall. The upper end of the short mesh wall is below the oil inlet pipe, and the upper end of the long mesh wall is above the oil outlet pipe.

[0019] The cleaning head is a bullet-shaped shell with the head facing downward, the shell contains a cleaning cavity, and the side wall and the head of the shell are both provided with cleaning holes;

[0020] The sealing plate is provided with a central hole, and the cleaning pipe passes through the central hole so that the cleaning head is located in the basket-type filter screen.

[0021] The cleaning hole is an angled oblique hole.

[0022] The cleaning assembly also includes a connecting pipe, a threaded rod, and a guide rod;

[0023] The outer wall of the connecting pipe is provided with a connecting plate, the threaded rod and the guide rod pass through the connecting plate, and the threaded rod is threadedly connected to the connecting plate;

[0024] The lower end of the connecting pipe is engaged with the upper end of the cleaning pipe and can rotate relative to each other;

[0025] The lower end of the threaded rod is movably connected to the upper end surface of the sealing plate;

[0026] The lower end of the guide rod is fixedly connected to the upper end surface of the sealing plate.

[0027] The cleaning assembly further comprises a turning handle, a first anti-dropping block is arranged at the upper end of the threaded rod, the first supporting block is provided with a radial through hole, and the turning handle is inserted into the radial through hole;

[0028] A second anti-falling block is arranged at the upper end of the guide rod.

[0029] A pipeline equipped with an online filter cleaning device includes a nitrogen pipeline, a steam pipeline, a water pipeline, and an exhaust pipeline;

[0030] The nitrogen pipeline, steam pipeline, water pipeline and exhaust pipeline are converged on a cleaning manifold, and the cleaning manifold is connected to an online filter cleaning device;

[0031] The online filter cleaning device comprises a filter cartridge and a cleaning assembly, wherein the filter cartridge wall is provided with an oil inlet pipe and an oil outlet pipe, a filter screen is provided inside the filter cartridge to separate the oil inlet pipe from the oil outlet pipe, and a sealing plate is provided at the upper end of the filter cartridge;

[0032] The cleaning assembly includes a cleaning pipe, a cleaning head, and a connecting pipe. The lower end of the cleaning pipe is connected to the upper end of the cleaning head. The cleaning pipe passes through the sealing plate, and the cleaning head is inserted into the filter cartridge. The lower end of the connecting pipe is connected to the upper end of the cleaning pipe.

[0033] The cleaning manifold is connected to the upper end of the connecting pipe.

[0034] The oil inlet pipe is connected to the oil inlet pipeline, the oil outlet pipe is connected to the oil outlet pipeline, and the sewage pipe is connected to the sewage pipeline.

[0035] The nitrogen pipeline is provided with a nitrogen valve;

[0036] The steam pipeline is provided with a steam valve;

[0037] The water pipeline is connected to the water storage tank, and a heater, a high-pressure pump, and a water valve are arranged on the water pipeline;

[0038] The exhaust pipeline is provided with an exhaust valve;

[0039] The cleaning manifold is provided with a total safety valve;

[0040] The oil inlet pipeline is provided with an oil inlet valve;

[0041] The oil outlet pipeline is provided with filter rear end equipment and an outlet valve.

[0042] Compared with the prior art, the utility model has the following beneficial effects:

[0043] 1. Realize online cleaning of the filter to avoid environmental pollution and degradation of filter quality caused by removing the filter; realize high-pressure flushing of the filter through a rotatable special cleaning device installed in the filter; the nozzle of the rotatable cleaning device in the filter is at a certain angle to the filter, which can push the nozzle to rotate under the action of the reaction force.

[0044] 2. It is universal and can solve such problems existing in most filters; it saves time and effort to clean the filter and reduce the impact on production; it avoids the cleaning method of burning the filter and eliminates environmental hazards; the impurities after cleaning the filter can be recycled and processed in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a schematic diagram of the cleaning state structure of an online filter cleaning device of the utility model;

[0046] Figure 2 It is a half-section schematic diagram of a cleaning state of an online filter cleaning device of the utility model;

[0047] Figure 3 This is a schematic diagram of the crude oil delivery state structure of an online filter cleaning device of the utility model;

[0048] Figure 4 It is a half-section schematic diagram of the crude oil conveying state of an online filter cleaning device of the utility model;

[0049] Figure 5 This is a schematic diagram of a pipeline structure equipped with an online filter cleaning device of the utility model;

[0050] In the figure: 1. filter cartridge; 2. cleaning assembly; 11. filter screen; 12. oil inlet pipe; 13. oil outlet pipe; 14. sewage pipe; 21. cleaning pipe; 22. cleaning head; 23. cleaning chamber; 24. cleaning hole; 25. connecting pipe; 26. connecting plate; 27. threaded rod; 28. turning handle; 29. ​​guide rod; 51. nitrogen pipeline; 52. steam pipeline; 53. water pipeline; 54. water storage tank; 55. heater; 56. high-pressure pump; 57. drain pipeline; 58. cleaning manifold; 59. filter back-end equipment; 60. outlet valve. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0052] Embodiment 1:

[0053] See also Figure 1 to Figure 2 The utility model provides an online filter cleaning device, comprising a filter cartridge 1 and a cleaning assembly 2. A sealing plate is provided at the upper end of the filter cartridge 1, and the cleaning assembly 2 passes through the sealing plate and is inserted into the filter cartridge 1.

[0054] The filter cartridge 1 is provided with an oil inlet pipe 12 and an oil outlet pipe 13 on its wall, and the oil inlet pipe 12 and the oil outlet pipe 13 are at the same distance from the bottom of the cartridge; a sewage pipe 14 is provided at the lower end of the filter cartridge 1 wall, and the sewage pipe is below the oil outlet pipe 13; a filter screen 11 is provided inside the filter cartridge 1, and the filter screen 11 is a basket-type filter screen with an oblique opening on the top, and has a short mesh wall and a long mesh wall, and the upper end of the short mesh wall is below the oil inlet pipe, and the upper end of the long mesh wall is above the oil outlet pipe 13.

[0055] The cleaning assembly includes a cleaning pipe 21 and a cleaning head 22. The lower end of the cleaning pipe 21 is connected to the upper end of the cleaning head 22. The cleaning head 22 is a bullet-shaped shell with the head facing downward. The shell contains a cleaning cavity 23. The side walls and the head of the shell are both provided with cleaning holes 24. The sealing plate is provided with a center hole. The cleaning pipe 21 passes through the center hole so that the cleaning head 22 is located in the filter net.

[0056] When this embodiment is in use, the cleaning manifold is connected to the upper end of the cleaning pipe 21 , and the cleaning material is sprayed out from the cleaning hole 24 to clean the filter screen 11 , and the waste liquid is discharged from the drain pipe 14 .

[0057] Embodiment 2:

[0058] In order to prevent the cleaning hole 24 from being blocked by impurities in the crude oil during crude oil transportation, the cleaning pipe 24 is movably inserted in the filter cartridge, and after cleaning, the cleaning pipe 24 can be pulled up to the top of the inner cavity of the filter cartridge 1, driving the cleaning pipe 24 to be separated from the inside of the filter screen 11;

[0059] Based on Example 1, please refer to Figures 1 to 4 The cleaning assembly 2 further includes a connecting pipe 25, a connecting plate 26, a threaded rod 27, a turning handle 28, and a guide rod 29;

[0060] The outer wall of the connecting tube 25 is provided with a connecting plate, and the threaded rod 27 and the guide rod 29 pass through the connecting plate, and the threaded rod 27 is threadedly connected to the connecting plate; the lower end of the connecting tube 25 is engaged with the upper end of the cleaning tube 21 and can rotate relatively, the lower end of the threaded rod 27 is movably connected to the upper end surface of the sealing plate, and the lower end of the guide rod 29 is fixedly connected to the upper end surface of the sealing plate; the upper end of the threaded rod 27 is provided with a first anti-slip block, the first support block is provided with a radial through hole, the turning handle 28 is inserted into the radial through hole, and the upper end of the guide rod 29 is provided with a second anti-slip block, and the guide rod 29 is used to guide the connecting tube 25 and improve the stability of the connecting tube 25.

[0061] The cleaning hole 24 is an angled slanted hole, so that the cleaning pipe 21 can rotate under the drive of high pressure to fully clean the filter screen 11.

[0062] When this embodiment is in use, the cleaning manifold is connected to the upper end of the connecting pipe 25, and the cleaning material is sprayed out from the cleaning hole 24. Driven by high pressure, the cleaning pipe 21 will rotate to fully clean the filter screen 11, and the waste liquid is discharged from the drain pipe 14.

[0063] After cleaning, the threaded rod 27 is rotated by rotating the handle 28, so that the connecting pipe 25 moves along the threaded rod, and the connecting pipe 25 drives the cleaning pipe 24 to move, so that the cleaning head 21 is separated from the inside of the filter screen 11. Figure 3 , Figure 4 shown.

[0064] Embodiment 3:

[0065] Based on Example 2, Figure 5 , providing a pipeline equipped with an online filter cleaning device, including a nitrogen pipeline 51, a steam pipeline 52, a water pipeline 53, and an exhaust pipeline 57;

[0066] The nitrogen pipeline 51, steam pipeline 52, water pipeline 53, and exhaust pipeline 57 converge on a cleaning manifold 58, and the cleaning manifold 58 is connected to the upper end of the connecting pipe 25;

[0067] The oil inlet pipe 12 is connected to the oil inlet pipeline, the oil outlet pipe 13 is connected to the oil outlet pipeline, and the sewage pipe 14 is connected to the sewage pipeline.

[0068] The nitrogen pipeline 51 is provided with a nitrogen valve;

[0069] The steam pipeline 52 is provided with a steam valve;

[0070] The water pipeline 53 is connected to the water storage tank 54, and a heater 55, a high-pressure pump 56, and a water valve are arranged on the water pipeline 53;

[0071] The exhaust line 57 is provided with an exhaust valve;

[0072] The cleaning manifold 58 is provided with a total safety valve;

[0073] The oil inlet pipeline is provided with an oil inlet valve;

[0074] The oil outlet pipeline is provided with a filter rear end device 59 and an outlet valve 60 .

[0075] The method of using this embodiment is as follows:

[0076] S1. During crude oil transportation, open the oil inlet valve and the outlet valve 60, close the drain valve, adjust the cleaning head 22 to the upper end of the inner cavity of the filter cartridge 1, and leave the filter screen 11. Figure 3 , Figure 4 As shown;

[0077] S2. When the filter screen 11 is clogged and needs to be cleaned, close the oil inlet valve and the outlet valve 60, open the drain valve, and drain the medium inside;

[0078] Adjust the cleaning head 22 to the lower end of the inner cavity of the filter cartridge 1, and place it inside the filter screen 11. Figure 1 , Figure 2 As shown;

[0079] Open the main safety valve; first purge with nitrogen, then clean the filter with steam or high-pressure hot water, and discharge the waste liquid through the drain pipe into the waste oil pool.

[0080] The filter can be cleaned online, which is easy to operate and minimizes the delay in crude oil transportation.

[0081] All components and connection methods of components not discussed in this application belong to the known technologies in this technical field and can be directly applied without further explanation.

[0082] In the present invention, the term "plurality" means two or more than two, unless otherwise clearly defined. The terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0083] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0084] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0085] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An online filter cleaning device, comprising a filter cartridge, wherein the filter cartridge wall is provided with an oil inlet pipe and an oil outlet pipe, and a filter screen is provided inside the filter cartridge to separate the oil inlet pipe from the oil outlet pipe, characterized in that: Also included is a cleaning assembly, which includes a cleaning pipe and a cleaning head; The lower end of the cleaning pipe is connected to the upper end of the cleaning head, and a sealing plate is arranged at the upper end of the filter cartridge. The cleaning pipe passes through the sealing plate, and the cleaning head is inserted into the filter cartridge.

2. An online filter cleaning device according to claim 1, characterized in that: The oil inlet pipe and the oil outlet pipe are at the same distance from the bottom of the cylinder; a sewage pipe is arranged at the lower end of the cylinder wall of the filter cylinder, and the sewage pipe is below the oil outlet pipe.

3. An online filter cleaning device according to claim 2, characterized in that: The filter is a basket type filter with an oblique opening on the top. The basket type filter has a short mesh wall and a long mesh wall. The upper end of the short mesh wall is below the oil inlet pipe, and the upper end of the long mesh wall is above the oil outlet pipe.

4. An online filter cleaning device according to claim 3, characterized in that: The cleaning head is a bullet-shaped shell with the head facing downward, the shell contains a cleaning cavity, and the side wall and the head of the shell are both provided with cleaning holes; The sealing plate is provided with a central hole, and the cleaning pipe passes through the central hole so that the cleaning head is located in the basket-type filter screen.

5. An online filter cleaning device according to claim 4, characterized in that: The cleaning hole is an angled oblique hole.

6. The on-line filter cleaning device according to claim 1, characterized in that: The cleaning assembly also includes a connecting pipe, a threaded rod, and a guide rod; The outer wall of the connecting pipe is provided with a connecting plate, the threaded rod and the guide rod pass through the connecting plate, and the threaded rod is threadedly connected to the connecting plate; The lower end of the connecting pipe is engaged with the upper end of the cleaning pipe and can rotate relative to each other; The lower end of the threaded rod is movably connected to the upper end surface of the sealing plate; The lower end of the guide rod is fixedly connected to the upper end surface of the sealing plate.

7. An online filter cleaning device according to claim 6, characterized in that: The cleaning assembly further comprises a turning handle, a first anti-slipping block is disposed at the upper end of the threaded rod, the first anti-slipping block is provided with a radial through hole, and the turning handle is inserted into the radial through hole; A second anti-falling block is arranged at the upper end of the guide rod.

8. A pipeline equipped with an online filter cleaning device, characterized in that: Including nitrogen pipelines, steam pipelines, water pipelines, and exhaust pipelines; The nitrogen pipeline, steam pipeline, water pipeline and exhaust pipeline are converged on a cleaning manifold, and the cleaning manifold is connected to an online filter cleaning device; The online filter cleaning device comprises a filter cartridge and a cleaning assembly, wherein the filter cartridge wall is provided with an oil inlet pipe and an oil outlet pipe, a filter screen is provided inside the filter cartridge to separate the oil inlet pipe from the oil outlet pipe, and a sealing plate is provided at the upper end of the filter cartridge; The cleaning assembly includes a cleaning pipe, a cleaning head, and a connecting pipe. The lower end of the cleaning pipe is connected to the upper end of the cleaning head. The cleaning pipe passes through the sealing plate, and the cleaning head is inserted into the filter cartridge. The lower end of the connecting pipe is connected to the upper end of the cleaning pipe. The cleaning manifold is connected to the upper end of the connecting pipe.

9. A pipeline equipped with an online filter cleaning device according to claim 8, characterized in that: The oil inlet pipe is connected to the oil inlet pipeline, the oil outlet pipe is connected to the oil outlet pipeline, and the sewage pipe is connected to the sewage pipeline.

10. A pipeline equipped with an online filter cleaning device according to claim 9, characterized in that: The nitrogen pipeline is provided with a nitrogen valve; The steam pipeline is provided with a steam valve; The water pipeline is connected to the water storage tank, and a heater, a high-pressure pump, and a water valve are arranged on the water pipeline; The exhaust pipeline is provided with an exhaust valve; The cleaning manifold is provided with a total safety valve; The oil inlet pipeline is provided with an oil inlet valve; The oil outlet pipeline is provided with filter rear end equipment and an outlet valve.

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