Valve chamber cover cap with oil-gas separation function

Abstract

The utility model is suitable for the technical field of automobile valve cover caps, and particularly relates to a valve cover cap with an oil-gas separation function, which comprises a valve cover cap main body, an engine oil filling port is arranged on the surface of the valve cover cap main body, and a mounting port is arranged on the surface of the valve cover cap main body. An upper shell is connected to the surface of the mounting port, and an air outlet pipeline is arranged on the side face of the upper shell. By arranging the oil collecting baffle, the strip-shaped groove, the second pore plate and the filter cotton assembly, when oil drops with the diameter of 0.5-1 micron in an oil-gas mixture are separated, the pressure loss of the oil-gas mixture before and after passing through the filter cotton can be reasonably controlled; according to the valve chamber cover cap with the oil-gas separation function, oil drops with the diameter ranging from 0.5 micrometer to 1 micrometer in an oil-gas mixture can be fully and efficiently filtered out by the filter cotton block, the problem that the pressure loss of an overall system is increased, and consequently the internal pressure of a crankcase is too high is solved, and therefore the oil-gas separation efficiency of the valve chamber cover cap with the oil-gas separation function is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile valve chamber covers, in particular to a valve chamber cover with an oil-gas separation function. Background Art

[0002] The cylinder head cover is usually called the valve cover, which is used to seal the valve mechanism and other parts to prevent dust from contaminating the oil or dust from entering and accelerating the wear of the valve mechanism parts. The valve cover has an oil port and a crankcase ventilation pipe interface.

[0003] When the internal combustion engine is running, the combustible mixture in the combustion chamber and the exhaust gas after combustion can enter the crankcase through the gap between the piston and the cylinder wall and the gap between the piston ring opening. If the exhaust gas is not discharged in time, the engine crankcase pressure will increase, eventually causing oil leakage or even engine damage. The airflow entering the crankcase contains water, engine oil, gasoline and other substances. In order to prevent these substances from being discharged into the atmosphere with the airflow and causing pollution to the atmosphere, the above-mentioned airflow needs to be separated from the oil and gas and filtered.

[0004] The valve cover with oil-gas separation function in the prior art is difficult to accurately control the pressure loss (pressure drop) before and after the filter cotton when separating oil droplets with a diameter of 0.5-1μm, resulting in the following problems: too small a pressure loss will lead to insufficient separation efficiency, while too large a pressure loss will lead to excessive overall pressure loss, thereby increasing the pressure inside the crankcase, which may cause engine oil leakage, abnormal wear of components, and even fuel injection in severe cases. Utility Model Content

[0005] The purpose of the embodiment of the utility model is to provide a valve chamber cover with oil-gas separation function, aiming to solve the technical problems mentioned in the background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A valve chamber cover with an oil-gas separation function, comprising a valve chamber cover body, and an oil filling port is arranged on the surface of the valve chamber cover body, a mounting port is arranged on the surface of the valve chamber cover body, and an upper shell is connected to the surface of the mounting port, an air outlet pipe is arranged on the side of the upper shell, an oil-gas inlet at an intermediate cam is arranged on one side of the mounting port, and a filter element fixing seat is arranged on the other side of the mounting port, and a first oil collecting port, a second oil collecting port, a third oil collecting port and a fourth oil collecting port are arranged in sequence in the mounting port from the oil-gas inlet at the intermediate cam to the filter element fixing seat;

[0008] A plurality of special-shaped oil baffles are arranged in the area near the oil and gas inlet at the middle cam inside the upper shell, a second orifice plate is arranged in the position near the first oil collecting port inside the installation port, an oil collecting baffle is arranged in the area near the second orifice plate inside the upper shell, and a plurality of strip-shaped grooves are opened on the surface of the oil collecting baffle, a filter cotton assembly is arranged in the area near the second oil collecting port inside the installation port, a first guide plate is connected to the area near the third oil collecting port inside the upper shell, and a filter element is connected to the surface of the filter element fixing seat;

[0009] The inside of the valve cover body is provided with a first oil drain pipe, a second oil drain pipe, a third oil drain pipe and a fourth oil drain pipe in sequence from the oil and gas inlet at the middle cam to the filter element fixing seat, and an oil and gas channel is provided in the area near the first guide plate inside the installation port, and the oil and gas channel is connected with the inside of the filter element.

[0010] Furthermore, the filter cotton component includes:

[0011] The interior of the installation port is connected to a first orifice plate, and a filter cotton block storage seat is provided on the side of the first orifice plate away from the second orifice plate, and a movable panel is detachably connected to the side of the filter cotton block storage seat;

[0012] A filter cotton block is arranged between the movable panel and the filter cotton block storage seat.

[0013] Furthermore, a limit slot is provided on the side of the filter cotton block storage seat, and a limit strip matching the shape of the limit slot is provided on the side of the movable panel, and the movable panel is detachably connected to the filter cotton block storage seat through the cooperation of the limit strip and the limit slot.

[0014] Furthermore, a connecting strip is connected to the side of the first orifice plate, and a second orifice plate is connected to the side of the connecting strip away from the first orifice plate, a first fixed slot and a second fixed slot are provided inside the upper shell, and the tops of the first orifice plate and the second orifice plate are respectively clamped inside the first fixed slot and the second fixed slot.

[0015] Furthermore, a guide slope is provided in the area inside the installation port near the oil and gas inlet at the middle cam, arc-shaped guide blocks are provided on both sides inside the upper shell body, and the arc-shaped guide blocks are provided between the second orifice plate and the special-shaped oil baffle plate, and a second guide plate is provided in the area inside the upper shell body near the filter cotton assembly.

[0016] Furthermore, the first oil collecting port, the second oil collecting port, the third oil collecting port and the fourth oil collecting port are respectively connected to the first oil discharge pipeline, the second oil discharge pipeline, the third oil discharge pipeline and the fourth oil discharge pipeline.

[0017] Furthermore, a reinforcement panel is provided in the area near the filter cotton assembly inside the upper shell, and the reinforcement panel is used to assist in defining the position of the filter cotton assembly.

[0018] Furthermore, the surface of the upper shell body is provided with a connecting end face, and the surface of the connecting end face is detachably connected to a filter element positioning cover, and the surface of the filter element positioning cover is circumferentially provided with a plurality of arc-shaped positioning side plates, the outer side of the filter element positioning cover is provided with a plurality of external fixing buckles, and the interior of the filter element positioning cover is provided with a plurality of internal fixing buckles.

[0019] Furthermore, fixing ears are provided on both sides of the surface of the filter element positioning cover, and fixing threaded holes are opened on the surface of the fixing ears, fixing threaded grooves are opened on both sides of the surface of the connecting end face, and fixing bolts are engaged and connected inside the fixing threaded holes and the fixing threaded grooves.

[0020] Furthermore, the filter cotton of the filter element is made of stainless steel metal fiber material, and a one-way pressure relief valve is arranged inside the filter element.

[0021] The utility model provides a valve chamber cover with oil-gas separation function, which has the following beneficial effects:

[0022] By arranging the oil collecting baffle, the strip groove, the second orifice plate and the filter cotton assembly, when separating the oil droplets with a diameter between 0.5-1μm in the oil-gas mixture, the pressure loss of the oil-gas mixture before and after passing through the filter cotton can be reasonably controlled, so that the oil droplets with a diameter between 0.5-1μm in the oil-gas mixture can be fully and efficiently filtered out by the filter cotton block, and the pressure loss of the overall system will not increase, which may cause the problem of excessive pressure inside the crankcase, thereby improving the oil-gas separation efficiency of the valve cover with oil-gas separation function. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The figure is a schematic diagram of the structure of a valve cover with oil-gas separation function.

[0024] Figure 2 The diagram is a schematic top view structure diagram of an upper shell and a valve chamber cover body in a valve chamber cover with an oil-gas separation function in a disassembled state.

[0025] Figure 3 The present invention is a schematic diagram of the upward structure of an upper shell body and a valve chamber cover body in a valve chamber cover with oil-gas separation function in a disassembled state.

[0026] Figure 4 The present invention is a schematic diagram of the top structure of a valve chamber cover with an oil-gas separation function, with the top surface of the shell as the cross-section.

[0027] Figure 5The present invention is a front structural schematic diagram of a valve chamber cover with an oil-gas separation function, with the center plane of the upper shell as the cross-section.

[0028] Figure 6 The present invention is a schematic structural diagram of a filter cotton assembly, a connecting strip and a second orifice plate in a valve chamber cover with an oil-gas separation function.

[0029] Figure 7 The present invention is a schematic structural diagram of a connecting strip in a valve chamber cover with oil-gas separation function, a second orifice plate, and a filter cotton component in a disassembled state.

[0030] Figure 8 The diagram is a structural diagram of a filter element positioning cover and an upper shell in a valve chamber cover with an oil-gas separation function in a disassembled state.

[0031] Fig. 9 The present invention is a schematic diagram of the upward structure of a filter element positioning cover in a valve chamber cover with oil-gas separation function.

[0032] Fig.10 It is a schematic diagram of the structure of a valve cover with an oil and gas separation function and an oil and gas inlet at the oil filling port.

[0033] In the figure: 1. Valve cover body; 2. Mounting port; 3. Filter element fixing seat; 4. Oil and gas channel; 5. Filter cotton assembly; 51. Movable panel; 52. Filter cotton block; 53. Limiting card strip; 54. Limiting card slot; 55. Filter cotton block storage seat; 56. First orifice plate; 6. Connecting strip; 7. Second orifice plate; 8. First oil collecting port; 9. Oil and gas inlet at the middle cam; 10. Oil filling port; 11. Upper shell; 12. Filter element positioning cover; 13. Exhaust pipe; 14. Filter element; 15. First guide plate; 16. Reinforcement panel; 17. First fixing card slot; 18 , oil collecting baffle; 19, second guide plate; 20, second fixed slot; 21, arc-shaped guide block; 22, special-shaped oil baffle; 23, first oil discharge pipeline; 24, second oil discharge pipeline; 25, third oil discharge pipeline; 26, fourth oil discharge pipeline; 27, guide slope; 28, second oil collecting port; 29, third oil collecting port; 30, fourth oil collecting port; 31, fixing bolt; 32, fixing threaded hole; 33, arc-shaped positioning side plate; 34, external fixing buckle; 35, fixing threaded groove; 36, connecting end face; 37, internal fixing buckle; 38, oil and gas inlet at the oil filling port. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0035] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0036] like Figure 1-Figure 7 As shown, a valve chamber cover with an oil-gas separation function provided by an embodiment of the utility model comprises a valve chamber cover body 1, and an oil filling port 10 is arranged on the surface of the valve chamber cover body 1, a mounting port 2 is arranged on the surface of the valve chamber cover body 1, and an upper shell 11 is connected to the surface of the mounting port 2, an oil-gas separation space is formed between the upper shell 11 and the valve chamber cover body 1, an air outlet pipe 13 is arranged on the side of the upper shell 11, an oil-gas inlet port 9 at the middle cam is arranged on one side of the mounting port 2, and a filter element fixing seat 3 is arranged on the other side of the mounting port 2, and a first oil collecting port 8, a second oil collecting port 28, a third oil collecting port 29 and a fourth oil collecting port 30 are arranged in sequence in the mounting port 2 from the oil-gas inlet port 9 at the middle cam to the filter element fixing seat 3;

[0037] A plurality of special-shaped oil baffles 22 are arranged in the area near the oil and gas inlet 9 at the middle cam inside the upper housing 11. The special-shaped oil baffles 22 form an oil baffle maze in the oil and gas separation space. The oil baffle maze is mainly used to filter and collect larger particle oil droplets in the oil and gas mixture, and the diameter of these oil droplets is generally above 1 μm.

[0038] A first oil drain pipe 23, a second oil drain pipe 24, a third oil drain pipe 25 and a fourth oil drain pipe 26 are arranged in sequence inside the valve chamber cover body 1 from the oil and gas inlet port 9 at the middle cam to the filter element fixing seat 3, an oil and gas channel 4 is arranged in the area near the first guide plate 15 inside the installation port 2, and the oil and gas channel 4 is connected with the interior of the filter element 14, and the first oil collecting port 8, the second oil collecting port 28, the third oil collecting port 29 and the fourth oil collecting port 30 are respectively connected with the first oil drain pipe 23, the second oil drain pipe 24, the third oil drain pipe 25 and the fourth oil drain pipe 26.

[0039] A guide slope 27 is provided in the area inside the installation port 2 near the oil and gas inlet 9 at the middle cam, arc-shaped guide blocks 21 are provided on both sides of the upper shell 11, and the arc-shaped guide blocks 21 are provided between the second orifice plate 7 and the special-shaped oil baffle plate 22, and a second guide plate 19 is provided in the area inside the upper shell 11 near the filter cotton assembly 5.

[0040] In one embodiment of the utility model, the oil-gas mixture enters the interior of the upper housing 11 through the oil-gas inlet 9 at the middle cam, and the oil-gas mixture quickly enters the oil baffle maze under the guidance of the guide slope 27. At this time, the large oil droplets in the oil-gas mixture hit the surface of the special-shaped oil baffle plate 22 driven by the blowby gas flow, and the large oil droplets attached to the surface of the special-shaped oil baffle plate 22 flow to the first oil collecting port 8 under the action of gravity, so that the captured part of the gasoline will be recovered into the crankcase through the first oil discharge pipe 23 connected to the first oil collecting port 8;

[0041] It can be understood that, since the special-shaped oil baffle plate 22 constituting the oil baffle labyrinth has a special curved shape, the flow of the oil-gas mixture in the labyrinth will be hindered, and when the oil-gas mixture passes through the tortuous portion set on the special-shaped oil baffle plate 22, the oil-gas mixture will also form a backflow vortex, so that the larger particle oil droplets in the oil-gas mixture can more fully contact the surface of the special-shaped oil baffle plate 22, so as to improve the collection efficiency of the oil-gas mixture;

[0042] Through the design of the baffle labyrinth, the oil-gas mixture entering the upper shell 3 can be subjected to oil-gas "pre-separation" treatment, and oil droplets larger than 1 μm can be mainly separated.

[0043] It is understood by those skilled in the art that, although the oil baffle maze composed of a number of special-shaped oil baffles 22 can effectively separate larger oil droplets with a diameter of more than 1 μm, the separation effect is very limited for oil droplets with a diameter between 0.5-1 μm. In this regard, the prior art often uses filter cotton made of oleophobic fine fiber material to effectively separate and collect oil droplets with a diameter between 0.5-1 μm in the oil-gas mixture.

[0044] However, when using filter cotton to separate oil droplets with diameters between 0.5-1μm, technicians found that although this filtering method can efficiently separate oil droplets with diameters between 0.5-1μm in the oil-gas mixture, the pressure loss (pressure drop) before and after the filter cotton is difficult to accurately control. Too little pressure loss will lead to insufficient separation efficiency, and too much pressure loss will make the overall pressure loss too large and cause the crankcase internal pressure to be too high, which will cause engine oil leakage, abnormal wear of parts, and severe cases may lead to fuel injection.

[0045] In view of the above technical problems, the technicians decided to make the following improvements on the basis of the above "pre-separation" structure: a second orifice plate 7 is provided in the installation port 2 near the first oil collecting port 8, an oil collecting baffle 18 is provided in the upper shell 11 near the second orifice plate 7, and a plurality of strip-shaped grooves are provided on the surface of the oil collecting baffle 18, and a filter cotton assembly 5 is provided in the installation port 2 near the second oil collecting port 28;

[0046] The filter cotton component 5 comprises:

[0047] The first orifice plate 56 is connected to the interior of the installation port 2, and a filter cotton block receiving seat 55 is provided on the side of the first orifice plate 56 away from the second orifice plate 7, and a movable panel 51 is detachably connected to the side of the filter cotton block receiving seat 55;

[0048] A filter cotton block 52 is arranged between the movable panel 51 and the filter cotton block storage seat 55. The filter cotton block 52 is a porous filter material made of a special oleophobic fine fiber material.

[0049] In the above technical solution, after the oil-gas mixture passes through the oil-gas "pre-separation" treatment of the oil-blocking maze, it will arrive at the second orifice plate 7 under the gathering and guiding action of the two arc-shaped guide blocks 21. At this time, the oil-gas mixture will contact the surface of the second orifice plate 7, and when passing through the holes on the second orifice plate 7, it will accelerate and hit the oil collecting baffle 18, and then contact the filter cotton assembly 5 under the guidance of the second guide plate 19, and the filter cotton block 52 in the filter cotton assembly 5 will perform oil-gas separation treatment again. The above oil-gas separation process is a "rough separation" treatment process for the oil-gas mixture;

[0050] After multiple tests and observations based on the above structure, the technicians found that by setting a second orifice plate 7 and an oil collecting baffle 18 between the baffle maze and the filter cotton assembly 5, the pressure loss of the oil-gas mixture before and after passing through the filter cotton block 52 can be controlled at around 400 Pa. When in this pressure loss state, oil droplets with a diameter of 0.5-1 μm in the oil-gas mixture can be fully and efficiently filtered out by the filter cotton block 52, without increasing the pressure loss of the overall system, which may lead to the problem of excessive pressure inside the crankcase.

[0051] Through the above technical scheme, when separating the oil droplets with a diameter between 0.5-1μm in the oil-gas mixture, the pressure loss of the oil-gas mixture before and after passing through the filter cotton can be reasonably controlled, so that the oil droplets with a diameter between 0.5-1μm in the oil-gas mixture can be fully and efficiently filtered out by the filter cotton block 52, and the pressure loss of the overall system will not increase, which may cause the problem of excessive pressure inside the crankcase, thereby improving the oil-gas separation efficiency of the valve cover with oil-gas separation function.

[0052] A first guide plate 15 is connected to the area inside the upper housing 11 near the third oil collecting port 29, and a filter element 14 is connected to the surface of the filter element fixing seat 3;

[0053] The oil-gas mixture that has undergone "coarse separation" treatment will enter the filter element 14 through the oil-gas channel 4 and be "finely separated" by the filter cotton in the filter element 14. The filter element 14 is mainly used to effectively separate and collect oil droplets, PM and PN particles with a diameter of less than 0.5 μm in the oil-gas mixture. The gas after the triple separation treatment of "pre-separation", "coarse separation" and "fine separation" is discharged through the outlet pipe 13.

[0054] It can be understood that the oil droplets separated and collected by the second orifice plate 7, the oil collecting baffle 18, the filter cotton assembly 5 and the filter element 14 will fall into the first oil collecting port 8, the second oil collecting port 28, the third oil collecting port 29 and the fourth oil collecting port 30, and are collected into the crankcase through the first oil drain pipe 23, the second oil drain pipe 24, the third oil drain pipe 25 and the fourth oil drain pipe 26.

[0055] Preferably, a limit slot 54 is provided on the side of the filter cotton block storage seat 55, and a limit strip 53 matching the shape of the limit slot 54 is provided on the side of the movable panel 51, and the movable panel 51 is detachably connected to the filter cotton block storage seat 55 through the cooperation of the limit strip 53 and the limit slot 54, so that the filter cotton block 52 can be conveniently assembled on the first orifice plate 56, so as to facilitate the replacement and maintenance of the filter cotton block 52 during subsequent use.

[0056] Preferably, the side of the first orifice plate 56 is connected to a connecting strip 6, and the side of the connecting strip 6 away from the first orifice plate 56 is connected to the second orifice plate 7, the interior of the upper shell 11 is provided with a first fixed slot 17 and a second fixed slot 20, and the tops of the first orifice plate 56 and the second orifice plate 7 are respectively clamped in the interior of the first fixed slot 17 and the second fixed slot 20, so that the positions of the first orifice plate 56 and the second orifice plate 7 can be more accurately and securely defined.

[0057] Preferably, a reinforcement panel 16 is provided in the area inside the upper shell 11 close to the filter cotton assembly 5 , and the reinforcement panel 16 is used to assist in defining the position of the filter cotton assembly 5 .

[0058] like Figure 1 , Figure 8 and Fig. 9 As shown, in one embodiment of the utility model, a connecting end face 36 is provided on the surface of the upper shell 11, and a filter element positioning cover 12 is detachably connected to the surface of the connecting end face 36, fixing ears are provided on both sides of the surface of the filter element positioning cover 12, and a fixing threaded hole 32 is provided on the surface of the fixing ear, and a fixing threaded groove 35 is provided on both sides of the surface of the connecting end face 36, and a fixing bolt 31 is engaged and connected to the inside of the fixing threaded hole 32 and the fixing threaded groove 35.

[0059] In this embodiment, when the filter element 14 needs to be replaced, the fixing bolts 31 can be turned out from the inside of the fixing thread groove 35 and the fixing thread hole 32 in turn, and the arc-shaped positioning side plate 33 can be pulled out from the inside of the upper shell 11, so that the filter element positioning cover 12 is directly separated from the upper shell 11, and then the filter element 14 can be removed from the filter element fixing seat 3. Through this limited installation method of the filter element 14, the filter element 14 can be conveniently replaced on the valve chamber cover body 1, and the sealing performance of the upper shell 11 can also be guaranteed.

[0060] Preferably, the surface of the filter element positioning cover 12 is provided with a plurality of arc-shaped positioning side plates 33 in a circumferential shape, the outer side of the filter element positioning cover 12 is provided with a plurality of external fixing buckles 34, and the interior of the filter element positioning cover 12 is provided with a plurality of internal fixing buckles 37, so that after the arc-shaped positioning side plates 33 are inserted into the interior of the upper housing 11, the positions of the filter element positioning cover 12 and the arc-shaped positioning side plates 33 can be initially fixed, so that the staff can subsequently use the fixing bolts 31 to firmly fix the filter element positioning cover 12 on the connecting end surface 36. In addition, this buckle design can also effectively improve the stability of the connection between the filter element positioning cover 12 and the connecting end surface 36.

[0061] Preferably, the filter cotton of the filter element 14 is made of stainless steel metal fiber material, and a one-way pressure relief valve is arranged inside the filter element 14. The filter cotton made of stainless steel metal fiber material can not only effectively improve the filtering efficiency of oil droplets, PM and PN particles below 0.5 μm in the oil-gas mixture, but also improve the overall service life of the filter element 14;

[0062] By arranging a one-way pressure relief valve inside the filter element 14, when the filter element is blocked or the pressure inside the crankcase is too high, the one-way pressure relief valve can be automatically opened, thereby allowing the air flow to flow out through the one-way pressure relief valve.

[0063] like Fig.10 As shown, the present application can also set the oil and gas inlet port to be the oil and gas inlet port 38 at the oil filling port to meet various design requirements.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve cover with oil-gas separation function, comprising a valve cover body (1), wherein the surface of the valve cover body (1) is provided with an oil filling port (10), the surface of the valve cover body (1) is provided with a mounting port (2), and the surface of the mounting port (2) is connected to an upper shell (11), and the side of the upper shell (11) is provided with an air outlet pipe (13), characterized in that: An oil and gas inlet (9) at the middle cam is provided on one side of the interior of the installation port (2), and a filter element fixing seat (3) is provided on the other side of the interior of the installation port (2); a first oil collection port (8), a second oil collection port (28), a third oil collection port (29) and a fourth oil collection port (30) are sequentially provided in the interior of the installation port (2) in a direction from the oil and gas inlet (9) at the middle cam to the filter element fixing seat (3); A plurality of special-shaped oil baffles (22) are arranged in an area near the oil and gas inlet (9) at the middle cam inside the upper shell (11); a second orifice plate (7) is arranged in a position near the first oil collecting port (8) inside the installation port (2); an oil collecting baffle (18) is arranged in an area near the second orifice plate (7) inside the upper shell (11); and a plurality of strip-shaped grooves are provided on the surface of the oil collecting baffle (18); a filter cotton assembly (5) is arranged in an area near the second oil collecting port (28) inside the installation port (2); a first guide plate (15) is connected to an area near the third oil collecting port (29) inside the upper shell (11); and a filter element (14) is connected to the surface of the filter element fixing seat (3); A first oil discharge pipeline (23), a second oil discharge pipeline (24), a third oil discharge pipeline (25) and a fourth oil discharge pipeline (26) are sequentially arranged inside the valve chamber cover body (1) from the oil and gas inlet port (9) at the middle cam to the filter element fixing seat (3); an oil and gas channel (4) is arranged in an area near the first guide plate (15) inside the installation port (2), and the oil and gas channel (4) is connected to the inside of the filter element (14).

2. The valve cover with oil-gas separation function according to claim 1, characterized in that: The filter cotton component (5) comprises: The interior of the installation port (2) is connected to a first orifice plate (56), and a filter cotton block storage seat (55) is provided on the side of the first orifice plate (56) away from the second orifice plate (7), and a movable panel (51) is detachably connected to the side of the filter cotton block storage seat (55); A filter cotton block (52) is arranged between the movable panel (51) and the filter cotton block storage seat (55).

3. The valve cover with oil-gas separation function according to claim 2, characterized in that: A limit slot (54) is provided on the side of the filter cotton block storage seat (55), and a limit clip strip (53) matching the shape of the limit slot (54) is provided on the side of the movable panel (51), and the movable panel (51) is detachably connected to the filter cotton block storage seat (55) through the cooperation of the limit clip strip (53) and the limit slot (54).

4. The valve cover with oil-gas separation function according to claim 2, characterized in that: The side surface of the first orifice plate (56) is connected to a connecting strip (6), and the side of the connecting strip (6) away from the first orifice plate (56) is connected to a second orifice plate (7), the interior of the upper shell (11) is provided with a first fixed card slot (17) and a second fixed card slot (20), and the tops of the first orifice plate (56) and the second orifice plate (7) are respectively clamped in the interior of the first fixed card slot (17) and the second fixed card slot (20).

5. The valve cover with oil-gas separation function according to claim 1, characterized in that: A guide slope (27) is provided in an area near the oil and gas inlet (9) at the middle cam inside the installation port (2), arc-shaped guide blocks (21) are provided on both sides inside the upper shell (11), and the arc-shaped guide blocks (21) are provided between the second orifice plate (7) and the special-shaped oil baffle plate (22), and a second guide plate (19) is provided in an area near the filter cotton assembly (5) inside the upper shell (11).

6. The valve cover with oil-gas separation function according to claim 1, characterized in that: The first oil collecting port (8), the second oil collecting port (28), the third oil collecting port (29) and the fourth oil collecting port (30) are respectively connected to the first oil discharge pipeline (23), the second oil discharge pipeline (24), the third oil discharge pipeline (25) and the fourth oil discharge pipeline (26).

7. The valve cover with oil-gas separation function according to claim 1, characterized in that: A reinforcement panel (16) is provided in an area inside the upper shell (11) close to the filter cotton assembly (5), and the reinforcement panel (16) is used to assist in defining the position of the filter cotton assembly (5).

8. The valve cover with oil-gas separation function according to claim 1, characterized in that: The surface of the upper shell (11) is provided with a connecting end surface (36), and the surface of the connecting end surface (36) is detachably connected to a filter element positioning cover (12), and the surface of the filter element positioning cover (12) is provided with a plurality of arc-shaped positioning side plates (33) in a circular shape, the outer side of the filter element positioning cover (12) is provided with a plurality of external fixing buckles (34), and the interior of the filter element positioning cover (12) is provided with a plurality of internal fixing buckles (37).

9. The valve cover with oil-gas separation function according to claim 8, characterized in that: The filter element positioning cover (12) has fixing ears on both sides of its surface, and fixing threaded holes (32) are formed on the surfaces of the fixing ears. The connection end surface (36) has fixing threaded grooves (35) on both sides of its surface, and fixing bolts (31) are meshed and connected inside the fixing threaded holes (32) and the fixing threaded grooves (35).

10. The valve cover with oil-gas separation function according to claim 1, characterized in that: The filter cotton of the filter element (14) is made of stainless steel metal fiber material, and a one-way pressure relief valve is arranged inside the filter element (14).

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