High performance low pressure loss oil-gas separation filter element

Abstract

The application discloses a high-performance low-pressure-loss oil-gas separation filter element, which comprises a lower end cover, an upper end cover, an oil-gas barrel and an oil-gas barrel cover, the oil-gas barrel is connected with an oil-gas pipe and a main oil return pipe, the oil-gas barrel is fixedly provided with a mounting ring, and a ring groove is formed in the mounting ring, and the technical scheme points comprise that a stainless steel punched screen is fixedly connected between the upper end cover and the lower end cover, the stainless steel punched screen is provided with two layers of an inner layer and an outer layer, a filter layer is arranged between the stainless steel punched screens, one side of the stainless steel punched screen is provided with a buffer plate, the buffer plate is fixedly provided with a plurality of buffer springs which are fixedly connected with the stainless steel punched screen, the upper end cover is mounted in the ring groove, a plurality of clamping block grooves are formed in the side wall of the upper end cover, clamping block springs are fixedly arranged at the bottom of the clamping block grooves, clamping blocks are fixedly connected with the clamping block springs, a clamping groove is formed in the inner wall of the ring groove and is used for clamping the clamping blocks, an insertion slot is formed in the side wall of one side of the clamping block, an insertion column slot is formed in the inner wall of the clamping block and penetrates through the upper end cover, and the insertion column slot is provided with an insertion column which is used for being inserted into the insertion slot, the oil-gas separation filter element disclosed by the application can reduce the loss of the oil-gas separation filter element, and the oil-gas separation performance is high.

Description

Technical Field

[0001] This invention relates to the field of oil-gas separation device technology, specifically a high-performance, low-pressure-loss oil-gas separation filter element. Background Technology

[0002] An oil-gas separator filter element is a device that separates gas from lubricating oil to ensure the normal operation of the lubrication system. It is widely used in solid-liquid, gas-solid, and gas-liquid separation and purification in fields such as petroleum, chemical, metallurgy, aviation, electronics, power, pharmaceutical, environmental protection, atomic energy, nuclear industry, natural gas, refractory materials, and fire-fighting equipment. In existing oil-gas separation devices, the oil-gas separator filter element is usually embedded in an oil-gas tank and fixed by the tank cover. When the oil-gas mixture is separated by the oil-gas separator filter element, the airflow impact can easily cause the filter element to shake or move up and down, which often leads to seal wear and lubricating oil leakage, causing many inconveniences to users and reducing the service life of the device. Summary of the Invention

[0003] The purpose of this invention is to provide a high-performance, low-pressure-loss oil-gas separator filter element to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a high-performance, low-pressure-loss oil-gas separator filter element, comprising a lower end cover, an upper end cover, an oil-gas tank, and an oil-gas tank cover. The oil-gas tank is connected to an oil-gas pipe and a main return oil pipe. An installation ring is fixedly provided at the open end of the oil-gas tank, and an annular groove is formed on the installation ring. An exhaust pipe and a secondary return oil pipe are provided on the oil-gas tank cover. A stainless steel perforated mesh is fixedly connected between the upper end cover and the lower end cover. The stainless steel perforated mesh is arranged in two layers, with a filter layer for filtering grease between the two layers. The portion of the lower end cover located inside the stainless steel perforated mesh has an oil collection groove. The secondary return oil pipe extends to the bottom of the oil collection groove. A buffer plate is provided on one side of the stainless steel perforated mesh. The buffer plate has multiple buffer springs fixedly and evenly provided at one end near the stainless steel perforated mesh. The buffer plate is an arc-shaped plate with the same curvature as the stainless steel perforated mesh. The upper end cover is installed in the annular groove and is attached to the inner wall of the annular groove. Multiple locking slots are evenly provided on the side wall of the upper end cover. A locking spring is fixedly provided at the bottom of the locking slot. The locking spring is fixedly connected to a locking block that is slidably connected to the inner wall of the locking slot. A locking groove for locking the locking block is provided on the inner wall of the annular groove. A slot is provided on the side wall of the locking block located in the locking slot. An insertion post groove is provided on the inner wall of the locking slot opposite to the slot and penetrates the upper end cover. An insertion post for inserting the locking block of the slot is slidably provided in the insertion post groove.

[0005] Preferably, the stainless steel perforated mesh is argon-arc welded to the upper and lower end caps, and the filter layer is made of HV fiberglass and has multiple layers arranged in a ring between the inner and outer stainless steel perforated meshes.

[0006] Preferably, a damping piston is embedded in the buffer spring facing the oil and gas pipe. The damping piston is fixedly connected to the outer wall of the stainless steel perforated mesh and the inner wall of the buffer plate. The buffer plate is a stainless steel sheet with the same thickness as the stainless steel perforated mesh, and the buffer plate is uniformly provided with air holes of the same size as the mesh density of the stainless steel perforated mesh.

[0007] Preferably, an oil collecting column is fixedly provided at the bottom of the lower end cover, and multiple oil collecting columns are evenly arranged around the bottom of the lower end cover. The oil collecting column is cylindrical and the bottom of the oil collecting column is conical.

[0008] Preferably, the end of the card block located outside the card block groove is an arc surface and is tightly engaged with the card slot. A limiting groove is provided on the inner wall of the card block groove away from the insertion post groove, and a limiting block that is fixedly connected to the side wall of the card block is slidably provided in the limiting groove.

[0009] Preferably, the inner wall of the insertion slot is symmetrically provided with return slots, and the side wall of the insertion slot located in the return slot is fixedly provided with a return block that is slidably connected to the return slot.

[0010] Preferably, a return spring is fixedly provided at one end of the return groove near the locking block groove, and the return spring is fixedly connected to the end of the return block near the locking block groove.

[0011] Preferably, the upper end face of the upper end cover is at the same level as the upper end face of the mounting ring, the depth of the insertion groove plus the depth of the slot is greater than the length of the insertion post, and the cross-section of the insertion post is square.

[0012] Preferably, the fixing ring at the bottom of the upper end cover that contacts the annular groove is provided with a sealing gasket, the sealing gasket being a rubber ring, and the filter layer having an activated carbon layer on the side near the inner ring stainless steel perforated mesh.

[0013] Preferably, the high-performance low-pressure-loss oil-gas separator filter element according to claim 1 is characterized in that: a pull ring is provided on the inner wall of the upper end cover, a connecting rod is fixedly connected to the outer wall of the pull ring and fixedly connected to the inner wall of the upper end cover, multiple connecting rods are evenly provided along the circumferential direction of the pull ring, the edge of the pull ring is rounded, and the highest horizontal plane of the pull ring is lower than the upper end face of the upper end cover.

[0014] Compared with the prior art, the beneficial effects of this invention are as follows: By argon arc welding the stainless steel perforated mesh to the upper and lower end caps, the possibility of impurities depositing inside the oil-gas separator can be reduced. The filter layer is made of HV fiberglass and has multiple layers arranged in a ring between the inner and outer stainless steel perforated mesh layers. The HV fiberglass can fully filter the grease in the oil-gas, achieving a filtration accuracy of 1μm, thus improving the oil-gas separation performance of the oil-gas separator filter element. Activated carbon can absorb odorous gases in the gas after oil-gas separation, purifying the gas and improving the performance of the oil-gas separator filter element. Through the arrangement of the buffer plate, buffer spring, and damping piston, the high-pressure oil-gas blown out from the oil-gas pipe first contacts the buffer plate. The buffer plate is impacted by the high-pressure oil-gas, compressing the buffer spring and causing it to deform to absorb the impact force. The damping piston slowly releases the deformation energy of the buffer spring, preventing the buffer spring from constantly swaying back and forth and affecting the oil-gas separator filter element, thereby achieving high... The buffering effect of the high-pressure oil and gas flow prevents the oil-gas separator filter element from being directly impacted by the high-pressure oil and gas in traditional oil-gas pipes, thus avoiding wear and vibration and extending its service life. This further reduces wear and extends the filter element's lifespan. Through the design of locking blocks, slots, locking block grooves, locking block springs, limiting grooves, limiting blocks, slots, inserts, insert slots, return blocks, return springs, and sealing gaskets, the oil-gas separator filter element is securely and stably installed inside the oil-gas tank under the limiting positions of the locking blocks and slots, the inserts and slots, and the oil-gas tank cover. This prevents the filter element from shaking inside the tank, reducing wear and tear. Disassembly is convenient and easy for personnel to operate. The sealing gasket improves airtightness and prevents oil and gas leakage. The oil collection column accelerates the flow of grease from the bottom of the lower end cap into the oil-gas tank, improving oil-gas separation efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is an external view of the oil-gas separator filter element in this embodiment;

[0017] Figure 2 This is a bottom view of the oil-gas separator filter element in this embodiment;

[0018] Figure 3 This is a disassembled diagram of the oil-gas separator filter element and the oil-gas tank in this embodiment;

[0019] Figure 4 This is a diagram showing the installation of the oil-gas separator filter element and oil-gas tank in this embodiment, but without the oil-gas tank cover installed.

[0020] Figure 5 This is a front sectional view of the oil-gas separator filter element installed in the oil-gas tank in this embodiment;

[0021] Figure 6 This is an enlarged view of section A in this embodiment;

[0022] Figure 7 This is an enlarged view of section B in this embodiment;

[0023] Figure 8 This is a partial sectional view of the oil-gas separator filter element and oil-gas tank installed in this embodiment, without the oil-gas tank cover installed.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Lower end cap; 2. Upper end cap; 3. Stainless steel perforated mesh; 4. Filter layer; 5. Oil and gas tank; 6. Oil and gas pipe; 7. Main return oil pipe; 8. Mounting ring; 9. Ring groove; 10. Oil and gas tank cover; 11. Secondary return oil pipe; 12. Exhaust pipe; 13. Oil collection tank; 14. Buffer plate; 15. Buffer spring; 16. Damping piston; 17. Oil collection column; 18. Slot; 19. Slot; 20. Slot groove; 21. Slot spring; 22. Slot; 23. Insert post; 24. Insert post groove; 25. Limiting groove; 26. Limiting block; 27. Return groove; 28. Return block; 29. ​​Return spring; 30. Sealing gasket; 31. Pull ring; 32. Connecting rod; 33. Air hole. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1-8This invention provides a technical solution: a high-performance, low-pressure-loss oil-gas separator filter element, comprising a lower end cover 1, an upper end cover 2, an oil-gas tank 5, and an oil-gas tank cover 10. The oil-gas tank 5 is connected to an oil-gas pipe 6 and a main return oil pipe 7. An installation ring 8 is fixedly provided at the open end of the oil-gas tank 5, and an annular groove 9 is provided on the installation ring 8. An exhaust pipe 12 and a secondary return oil pipe 11 are provided on the oil-gas tank cover 10. A stainless steel perforated mesh 3 is fixedly connected between the upper end cover 2 and the lower end cover 1. The stainless steel perforated mesh 3 is arranged in two layers, with a filter layer 4 for filtering grease between the two layers of stainless steel perforated mesh 3. The portion of the lower end cover 1 located inside the stainless steel perforated mesh 3 is provided with an oil collection groove 13. The secondary return oil pipe 11 extends to the bottom of the oil collection groove 13. A buffer plate 14 is provided on one side of the stainless steel perforated mesh 3. The buffer plate 14 is close to the stainless steel perforated mesh 3. One end of the perforated mesh 3 is fixedly and evenly provided with multiple buffer springs 15 that are fixedly connected to the stainless steel perforated mesh 3. The buffer plate 14 is an arc plate and has the same curvature as the stainless steel perforated mesh 3. The upper end cover 2 is installed in the annular groove 9 and is attached to the inner wall of the annular groove 9. Multiple locking slots 20 are evenly opened on the side wall of the upper end cover 2. A locking spring 21 is fixedly provided at the bottom of the locking slot 20. The locking spring 21 is fixedly connected to a locking block 19 that is slidably connected to the inner wall of the locking slot 20. A locking groove 18 is opened on the inner wall of the annular groove 9 for the locking block 19 to be inserted. A slot 22 is opened on the side wall of the locking block 19 located in the locking slot 20. An insertion post groove 24 is opened on the inner wall of the locking slot 20 opposite to the slot 22 and passes through the upper end cover 2. An insertion post 23 for inserting into the slot 22 and limiting the locking block 19 is slidably provided in the insertion post groove 24.

[0028] Specifically, the stainless steel perforated mesh 3 is argon-arc welded to the upper end cover 2 and the lower end cover 1 to reduce the possibility of impurities depositing in the oil and gas tank 5. The filter layer 4 is made of HV glass fiber and has multiple layers arranged in a ring between the inner and outer layers of stainless steel perforated mesh 3. The HV glass fiber can fully filter the grease in the oil and gas, and the filtration accuracy can reach 1μm, improving the oil and gas separation performance of the oil and gas separation filter element.

[0029] Specifically, a damping piston 16 is embedded in the buffer spring 15 directly opposite the oil and gas pipe 6. The damping piston 16 is fixedly connected to the outer wall of the stainless steel perforated mesh 3 and the inner wall of the buffer plate 14. The buffer plate 14 is a stainless steel sheet with the same thickness as the stainless steel perforated mesh 3. The buffer plate 14 is evenly provided with air holes 33 with the same mesh density as the stainless steel perforated mesh 3. The high-pressure oil and gas blown out by the oil and gas pipe 6 first comes into contact with the buffer plate 14. The buffer plate 14 is impacted by the high-pressure oil and gas, which compresses the buffer spring 15, causing the buffer spring 15 to deform and absorb the impact force. The damping piston 16 slowly releases the deformation energy of the buffer spring 15 to avoid the buffer spring 15 from constantly shaking back and forth and affecting the oil and gas separation filter element. This achieves the buffering effect of the high-pressure oil and gas impact, avoiding the wear and vibration of the oil and gas separation filter element caused by the direct impact of the high-pressure oil and gas from the traditional oil and gas pipe 6, which affects the service life of the oil and gas separation filter element.

[0030] Specifically, an oil collecting column 17 is fixedly provided at the bottom of the lower end cover 1. Multiple oil collecting columns 17 are evenly arranged around the bottom of the lower end cover 1. The oil collecting column 17 is cylindrical and the bottom of the oil collecting column 17 is conical. The grease filtered by the filter layer 4 can flow down the stainless steel perforated mesh 3 to the bottom of the lower end cover 1 and flow into the bottom of the oil and gas tank 5 through the oil collecting column 17. The oil collecting column 17 can accelerate the flow of grease from the bottom of the lower end cover 1 into the oil and gas tank 5 and improve the oil and gas separation efficiency.

[0031] Specifically, the end of the locking block 19 located outside the locking block groove 20 is curved and tightly engages with the locking groove 18, facilitating the installation of the upper end cover 2 on the annular groove 9. When installing the oil-gas separator filter element, the lower end cover 1 and the stainless steel perforated mesh 3 are placed into the oil-gas tank 5, and the buffer plate 14 is aligned with the oil-gas pipe 6. The upper end cover 2 is then placed into the annular groove 9, aligning the locking block 19 with the locking groove 18. The curved surface of the locking block 19 is compressed by the pressure of the inner wall of the annular groove 9, causing the locking block spring 21 to slide into the locking block groove 20 until the upper end cover 2 is fully installed on the annular groove 9. At this point, the locking block 19 and the locking groove 18 are directly opposite each other. Under the elastic force of the locking block spring 21, the locking block 19 engages with the locking groove 18, aligning with the upper end cover. 2. When removing the oil-gas separator filter element from the annular groove 9, lift the upper cover 2 with a little force. The arc surface of the locking block 19 will be subjected to force, causing the locking block 19 to slide into the locking block groove 20. The upper cover 2 can then be removed from the annular groove 9, thereby removing the entire oil-gas separator filter element. The operation is convenient. A limiting groove 25 is opened on the inner wall of the locking block groove 20 away from the insertion column groove 24. A limiting block 26 that is fixedly connected to the side wall of the locking block 19 is slidably provided in the limiting groove 25. Through the limiting groove 25 and the limiting block 26, the locking block 19 can be prevented from sliding out of the locking block groove 20 too much, ensuring that the end of the locking block 19 outside the locking block groove 20 is an arc surface, ensuring the smooth installation of the upper cover 2.

[0032] Specifically, the inner wall of the insertion slot 24 is symmetrically provided with return slots 27, and the side wall of the insertion post 23 located in the return slot 27 is fixedly provided with a return block 28 that is slidably connected to the return slot 27. The restriction of the return slot 27 and the return block 28 can prevent the insertion post 23 from falling out of the insertion slot 24.

[0033] Specifically, a return spring 29 is fixedly provided at one end of the return groove 27 near the locking block groove 20. The return spring 29 is fixedly connected to the end of the return block 28 near the locking block groove 20. After the locking block 19 is inserted into the locking slot 18, the insertion post 23 is inserted into the slot 22 by the squeezing of the oil and gas tank cover 10 to limit the locking block 19. During the process of the insertion post 23 being inserted into the slot 22, the insertion post 23 drives the return block 28 to compress the return spring 29. After the oil and gas tank cover 10 is removed, the return block 28 returns to its original position under the elastic force of the return spring 29, causing the insertion post 23 to return to its original position and disengage from the slot 22, thus losing the limitation on the locking block 19, which facilitates the replacement of the oil and gas separator filter element.

[0034] Specifically, the upper end face of the upper cover 2 is at the same level as the upper end face of the mounting ring 8. When the oil and gas tank cover 10 is installed on the mounting ring 8 by bolts, the oil and gas tank cover 10 can fit snugly with the upper end cover 2, making the oil and gas separator filter element more stable in the oil and gas tank 5. The depth of the insertion groove 24 plus the depth of the slot 22 is greater than the length of the insertion post 23, ensuring that the insertion post 23 does not interfere with the fit between the oil and gas tank cover 10 and the upper end cover 2. The cross-section of the insertion post 23 is square, ensuring the stability of the insertion post 23 sliding in the insertion groove 24.

[0035] Specifically, the fixing ring at the bottom of the upper cover 2 that contacts the annular groove 9 is equipped with a sealing gasket 30, which is a rubber ring to improve airtightness and prevent oil and gas leakage. The filter layer 4 is equipped with an activated carbon layer on the side near the inner ring stainless steel perforated mesh 3. The activated carbon can absorb odorous gases in the gas after oil and gas separation and purify the gas.

[0036] Specifically, the inner wall of the upper cover 2 is provided with a pull ring 31, and the outer wall of the pull ring 31 is fixedly connected with a connecting rod 32 that is fixedly connected to the inner wall of the upper cover 2. Multiple connecting rods 32 are evenly arranged along the circumference of the pull ring 31. By holding the pull ring 31, it is convenient to install and remove the oil-gas separator filter element in the oil-gas tank 5. The edge of the pull ring 31 is rounded to protect the operator's hands from being cut. The highest horizontal plane of the pull ring 31 is lower than the upper surface of the upper cover 2 so that the pull ring 31 does not affect the installation of the oil-gas tank cover 10.

[0037] A specific application example of this embodiment is as follows:

[0038] When using this device, install the oil-gas separator filter element into the oil-gas tank 5. Hold the pull ring 31 and place the lower end cover 1 and stainless steel perforated mesh 3 into the oil-gas tank 5, aligning the buffer plate 14 with the oil-gas pipe 6. Place the upper end cover 2 into the annular groove 9 and align the locking block 19 with the locking groove 18. The arc surface of the locking block 19 is compressed by the pressure of the inner wall of the annular groove 9, causing the locking block spring 21 to slide into the locking block groove 20. After the upper end cover 2 is fully installed on the annular groove 9, the locking block 19 and the locking groove 18 are directly opposite each other. Under the elastic force of the locking block spring 21, the locking block 19 is locked into the locking groove 18, limiting the upper end cover 2. Then, install the oil-gas tank cover 10 onto the mounting ring 8 with bolts. The compression of the oil-gas tank cover 10 forces the insert post 23 into the slot 22, limiting the locking block 19. During the insertion of the insert 23 into the slot 22, the insert 23 drives the return block 28 to compress the return spring 29 until the oil and gas tank cover 10 is installed and tightened. The oil and gas separator filter element can then be installed. Under the limiting of the locking block 19 and the locking groove 18, the limiting of the insert 23 and the slot 22, and the limiting of the oil and gas tank cover 10, the oil and gas separator filter element can be installed securely and stably in the oil and gas tank 5, avoiding the shaking of the oil and gas separator filter element in the oil and gas tank 5 and reducing the wear of the oil and gas separator filter element. The high-pressure oil and gas blown out by the oil and gas pipe 6 first comes into contact with the buffer plate 14. The buffer plate 14 is impacted by the high-pressure oil and gas, compressing the buffer spring 15 and causing the buffer spring 15 to deform and absorb the impact force. The damping piston 16 slowly releases the deformation energy of the buffer spring 15. To prevent the buffer spring 15 from constantly swaying back and forth and affecting the oil-gas separator filter element, this design achieves a buffering effect against the impact of high-pressure oil and gas. It avoids the direct impact of high-pressure oil and gas from the traditional oil-gas pipe 6 on the oil-gas separator filter element, preventing wear and vibration that would affect its service life. This further reduces wear and extends the service life of the oil-gas separator filter element. The stainless steel perforated mesh 3 is argon-arc welded to the upper end cover 2 and the lower end cover 1, reducing the possibility of impurities accumulating inside the oil-gas tank 5. The filter layer 4 is made of HV glass fiber and has multiple layers arranged in a ring between the inner and outer stainless steel perforated mesh 3. The HV glass fiber can effectively filter the grease in the oil and gas, achieving a filtration accuracy of 1μm, thus improving the oil-gas separation filter element's performance. The activated carbon absorbs odorous gases from the gas after oil-gas separation, purifying the gas and improving the performance of the oil-gas separation filter element. The oil collection column 17 accelerates the flow of grease from the bottom of the lower end cover 1 into the oil-gas tank 5, improving the oil-gas separation efficiency. When the oil-gas separation filter element needs to be removed, the oil-gas tank cover 10 is removed. After the insertion column 23 loses the pressure of the oil-gas tank cover 10, the return block 28 returns to its original position under the elastic force of the return spring 29, causing the insertion column 23 to return to its original position and disengage from the slot 22, thus losing the limit on the locking block 19. Hold the pull ring 31 and pull out the oil-gas separation filter element. The arc surface of the locking block 19 is subjected to force, causing the locking block 19 to slide into the locking block groove 20. The upper end cover 2 can then be removed from the ring groove 9, and the oil-gas separation filter element can be disassembled from the oil-gas tank 5, ensuring convenient disassembly.

[0039] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0040] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that variations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-performance, low-pressure-loss oil-gas separator filter element, comprising a lower end cap (1), an upper end cap (2), an oil-gas tank (5), and an oil-gas tank cover (10), wherein the oil-gas tank (5) is connected to an oil-gas pipe (6) and a main return oil pipe (7), an installation ring (8) is fixedly provided at the open end of the oil-gas tank (5), and an annular groove (9) is provided on the installation ring (8), and an exhaust pipe (12) and a secondary return oil pipe (11) are provided on the oil-gas tank cover (10), characterized in that: A stainless steel perforated mesh (3) is fixedly connected between the upper end cover (2) and the lower end cover (1). The stainless steel perforated mesh (3) is configured with two layers, an inner and an outer layer, and a filter layer (4) for filtering grease is provided between the two layers of stainless steel perforated mesh (3). The portion of the lower end cover (1) located inside the stainless steel perforated mesh (3) is provided with an oil collection groove (13). The secondary oil return pipe (11) extends to the bottom of the oil collection groove (13). A buffer plate (14) is provided on one side of the stainless steel perforated mesh (3). Multiple buffer springs (15) are fixedly and evenly provided at the end of the buffer plate (14) near the stainless steel perforated mesh (3). The buffer plate (14) is an arc-shaped plate with the same curvature as the stainless steel perforated mesh (3). The upper end cover (2) is installed in the annular groove (9). And it is in contact with the inner wall of the ring groove (9). The upper end cover (2) has a plurality of locking slots (20) evenly opened on the side wall. The bottom of the locking slot (20) is fixedly provided with a locking spring (21). The locking spring (21) is fixedly connected with a locking block (19) that is slidably connected to the inner wall of the locking slot (20). The inner wall of the ring groove (9) is provided with a locking groove (18) for the locking block (19) to be inserted. The side wall of the locking block (19) located in the locking slot (20) is provided with a slot (22). The slot (22) is located on the upper side of the locking block (19). The inner wall of the locking slot (20) opposite to the slot (22) is provided with a post groove (24) that penetrates the upper end cover (2). The post groove (24) is slidably provided with a post (23) for inserting the locking block (19) of the slot (22).

2. The high-performance, low-pressure-loss oil-gas separator filter element according to claim 1, characterized in that: The stainless steel perforated mesh (3) is welded to the upper end cover (2) and the lower end cover (1) by argon arc welding. The filter layer (4) is made of HV glass fiber and has multiple layers arranged in a ring between the inner and outer stainless steel perforated mesh (3).

3. The high-performance, low-pressure-loss oil-gas separator filter element according to claim 1, characterized in that: A damping piston (16) is embedded in the buffer spring (15) facing the oil and gas pipe (6). The damping piston (16) is fixedly connected to the outer wall of the stainless steel perforated mesh (3) and the inner wall of the buffer plate (14). The buffer plate (14) is a stainless steel sheet with the same thickness as the stainless steel perforated mesh (3). The buffer plate (14) is evenly provided with air holes (33) with the same mesh density as the stainless steel perforated mesh (3).

4. The high-performance, low-pressure-loss oil-gas separator filter element according to claim 1, characterized in that: The bottom of the lower end cover (1) is fixedly provided with an oil collecting column (17). Multiple oil collecting columns (17) are evenly arranged around the bottom of the lower end cover (1). The oil collecting column (17) is cylindrical and the bottom of the oil collecting column (17) is a conical head.

5. The high-performance, low-pressure-loss oil-gas separator filter element according to claim 1, characterized in that: The end of the card block (19) outside the card block groove (20) is arc-shaped and tightly engaged with the card groove (18). The inner wall of the card block groove (20) away from the insertion slot (24) has a limiting groove (25). A limiting block (26) that is fixedly connected to the side wall of the card block (19) is slidably provided in the limiting groove (25).

6. The high-performance, low-pressure-loss oil-gas separator filter element according to claim 1, characterized in that: The inner wall of the insertion slot (24) is symmetrically provided with return slots (27), and the side wall of the insertion (23) located in the return slot (27) is fixedly provided with a return block (28) that is slidably connected to the return slot (27).

7. A high-performance, low-pressure-loss oil-gas separator filter element according to claim 6, characterized in that: A return spring (29) is fixedly provided at one end of the return groove (27) near the block groove (20), and the return spring (29) is fixedly connected to one end of the return block (28) near the block groove (20).

8. The high-performance, low-pressure-loss oil-gas separator filter element according to claim 1, characterized in that: The upper end face of the upper end cover (2) is at the same level as the upper end face of the mounting ring (8). The depth of the insertion groove (24) plus the depth of the slot (22) is greater than the length of the insertion post (23). The cross-section of the insertion post (23) is square.

9. A high-performance, low-pressure-loss oil-gas separator filter element according to claim 1, characterized in that: The bottom of the upper end cover (2) is fixed with a sealing gasket (30) in contact with the ring groove (9). The sealing gasket (30) is a rubber ring. The filter layer (4) is provided with an activated carbon layer on the side near the inner ring stainless steel perforated mesh (3).

10. A high-performance, low-pressure-loss oil-gas separator filter element according to claim 1, characterized in that: The inner wall of the upper cover (2) is provided with a pull ring (31). The outer wall of the pull ring (31) is fixedly connected with a connecting rod (32) that is fixedly connected to the inner wall of the upper cover (2). Multiple connecting rods (32) are evenly provided along the circumference of the pull ring (31). The edge of the pull ring (31) is rounded. The highest horizontal plane of the pull ring (31) is lower than the upper surface of the upper cover (2).

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