Oil and gas separation device

Abstract

The present invention discloses an oil-gas separation device. The oil-gas separation device includes: a first container extending along a first direction, the first container being used for cyclone-separating an oil-gas mixture; a second container extending along a second direction, the second container being connected to the first container and used for storing the liquid oil after the cyclone separation of the oil-gas mixture and returning oil to an air compressor; wherein, in the second direction, the width of the second container is greater than the width of the first container; the first container has an extension pipe portion extending into the second container. The oil-gas separation device of the present invention can significantly increase the volume of the device within a given limited space, improve the swirling and separation performance of the device, and is beneficial to the long-term operation of the air compressor.

Description

Technical Field

[0001] The present invention relates to the technical field of oil-gas separation equipment, and more particularly to an oil-gas separation device. Background Art

[0002] In related technologies, the oil-gas separation tank of an air compressor usually adopts a vertical straight-cylinder design. Within a limited installation space, the volume of the oil-gas separation tank is relatively small.

[0003] Moreover, in order to prevent the problem of oil backflow from the air inlet at the beginning of the operation of the air compressor, the conventional vertical straight-cylinder designed oil-gas separation tank needs to reduce the initial oil filling amount in the oil-gas separation tank, that is, lower the initial oil level in the oil-gas separation tank. This means that as the operation time of the air compressor increases, the oil level in the oil-gas separation tank becomes lower and lower, and the height difference between the air inlet and the oil surface as the effective separation height will become larger and larger, which will cause the tangential velocity of the outer vortex to gradually decay and the separation performance to become worse and worse, and the air compressor cannot maintain continuous operation. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, an object of the present invention is to provide an oil-gas separation device that can significantly increase the volume of the device and improve the swirling and separation performance of the device within a given limited space.

[0005] The oil-gas separation device according to an embodiment of the present invention includes: a first container extending along a first direction for cyclone separating an oil-gas mixture; a second container extending along a second direction and communicating with the first container for storing the liquid oil after cyclone separating the oil-gas mixture and returning the oil to the air compressor; wherein, in the second direction, the width of the second container is greater than the width of the first container; and the first container has an extension pipe portion extending into the second container.

[0006] The oil-gas separation device according to an embodiment of the present invention is configured to include a first container and a second container. The first container extends along a first direction, the second container extends along a second direction, the second container communicates with the first container, and the width of the second container is greater than the width of the first container in the second direction. This can significantly increase the volume of the device within a given limited space and improve the swirling and separation performance of the device, which is beneficial to the continuous operation of the air compressor.

[0007] In some embodiments, the oil-gas separation device further includes: a swirl stop plate located in the first container for restricting the swirling of the liquid level in the first container.

[0008] In some embodiments, the oil-gas separation device further comprises a receiving plate, which is connected to the anti-rotation plate and disposed above the anti-rotation plate for rebounding the gas after the separation of the oil-gas mixture.

[0009] In some embodiments, the anti-rotation plate comprises at least one plate member, the lower end of each plate member is connected to the barrel wall of the first container, and an air flow opening is formed between the upper end of each plate member and the barrel wall of the first container.

[0010] In some embodiments, when the anti-rotation plate comprises a plurality of the plate members, the plurality of plate members are arranged at intervals around the barrel wall of the first container.

[0011] In some embodiments, the oil-gas separation device further comprises an oil separation core, which is arranged in the first container and has a core inlet and a core outlet. The core inlet is used to receive the gas after the cyclone separation of the oil-gas mixture, and the core outlet extends outside the first container for discharging the filtered gas.

[0012] In some embodiments, the oil-gas separation device further comprises an oil separation core, which is arranged outside the first container and has a core inlet and a core outlet. The core inlet is communicated with the first container for receiving the gas after the cyclone separation of the oil-gas mixture, and the core outlet is used to discharge the filtered gas.

[0013] In some embodiments, the oil-gas separation device further comprises a partition barrel, which is located in the first container and connected to the top wall of the first container. An isolation cavity is formed between the partition barrel and the inner wall of the first container. The first container has a gas-lifting port communicated with the core inlet, and the air inlet direction of the gas-lifting port is the same as the axial direction of the partition barrel.

[0014] In some embodiments, the width of the extension pipe portion gradually decreases in the direction close to the second container.

[0015] In some embodiments, the anti-rotation plate extends into the extension pipe portion, and the lower end of each plate member is connected to the pipe wall of the extension pipe portion.

[0016] In some embodiments, a fuel filling port and a mixture inlet are provided on the first container. The fuel filling port is used to fill the oil-gas separation device with oil, and the mixture inlet is used to introduce the oil-gas mixture.

[0017] In some embodiments, a return oil port is provided on the second container for returning the oil in the oil-gas separation device to the air compressor.

[0018] In some embodiments, the return oil port is arranged at the bottom of the second container.

[0019] In some embodiments, the oil return port is disposed in the middle of the second container, and an oil return pipe is provided in the second container to connect the oil return port.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a schematic perspective view of the oil-gas separation device in an embodiment of the present invention;

[0023] Figure 2 is a cross-sectional view of the oil-gas separation device in an embodiment of the present invention;

[0024] Figure 3 is a side view of the oil-gas separation device in an embodiment of the present invention;

[0025] Figure 4 is an assembly schematic diagram of the anti-rotation plate and the receiving plate in an embodiment of the present invention;

[0026] Figure 5 is a schematic diagram of the oil separation core of the oil-gas separation device installed outside the first container in an embodiment of the present invention;

[0027] Figure 6 is a schematic diagram of the oil separation core of the oil-gas separation device installed inside the first container in an embodiment of the present invention.

[0028] REFERENCE SIGNS:

[0029] 100, oil-gas separation device;

[0030] 10, first container; 101, extension pipe portion; 101a, open end; 102, fuel filling port; 103, mixture inlet; 104, gas lift port; 105, gas lift pipe; 10a, isolation chamber;

[0031] 20, second container; 201, oil return port; 202, oil return pipe;

[0032] 30, anti-rotation plate; 310, plate member; 30a, air flow through port;

[0033] 40, receiving plate;

[0034] 50, oil separation core; 501, gas inlet; 502, gas outlet;

[0035] 60, separation barrel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0037] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0038] In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features, used to distinguish and describe features, without order or importance.

[0039] In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] The following refers to Figures 1 - 6 , and describes the oil-gas separation device 100 of the embodiments of the present invention. Among them, the oil-gas separation device 100 of the present invention can be applied to air compression equipment.

[0042] As Figure 1 shown, the oil-gas separation device 100 of the embodiments of the present invention includes a first container 10 and a second container 20.

[0043] The first container 10 extends in a first direction, and the first container 10 is used for cyclone separation of the oil-gas mixture. The second container 20 extends in a second direction, and the second container 20 communicates with the first container 10 and is used for storing the liquid oil after cyclone separation of the oil-gas mixture and returning oil to the air compressor; wherein, in the second direction (Figure 1 The width of the second container 20 (in the left-right direction) is greater than the width of the first container 10; the first container 10 has an extension tube portion 101 extending into the second container 20.

[0044] In order to better understand the present invention, the first direction is taken as the up and down direction, and the second direction is the left and right direction as an example for explanation. At this time, the first container 10 constitutes a vertical container, and the second container 20 constitutes a horizontal container. In the oil-gas separation device of the same height size, the present application uses the first container 10 and the second container 20 to increase the volume of the device and improve the oil storage capacity.

[0045] When the oil-gas mixture enters the first container 10, a swirling airflow will be formed inside the first container 10, thereby cyclone separation of the oil-gas mixture, wherein the swirling airflow will cause the liquid level in the first container 10 to swirl, that is, the liquid level in the first container 10 is in the shape of a parabola with an opening upward, the liquid level in the first container 10 is circular, and the liquid level in the second container 20 is waist-shaped, so that in the last period of time before the air compressor is maintained and refueled, the liquid level in the second container 20 will not swirl, thereby avoiding the inhalation of air at the oil return port 201, thereby extending the maintenance cycle of the entire device.

[0046] In addition, a mixture air inlet 103 is provided on the first container 10, and the air inlet direction of the mixture air inlet 103 is tangent to the barrel wall of the first container 10. The mixture air inlet 103 is used to introduce an oil-gas mixture. The height difference between the mixture air inlet 103 and the liquid level in the first container 10 is the effective separation height. Since the liquid level in the second container 20 is larger than the liquid level in the first container 10, the ability to store liquid oil is also relatively strong. As the running time of the air compressor increases, the drop in the liquid level in the second container 20 is relatively small, which can ensure that the swirl speed and separation performance in the first container 10 are relatively long-lasting, thereby improving the overall performance of the device.

[0047] Furthermore, as the air compressor runs for a long time, the oil in the oil-gas separation device 100 is consumed, the liquid level begins to drop, and a small amount of gas will swirl down from the gap near the barrel wall to the page and then rebound. In this way, the effective separation height between the swirling airflow and the liquid surface is greatly increased, and the swirling airflow speed near the liquid surface is gradually reduced. By setting the extension pipe portion 101, the speed at which the swirling airflow speed decreases can be reduced to ensure the separation performance.

[0048] It should be noted that the "first direction" is not limited to the up and down direction, and the "second direction" is not limited to the left and right direction, and the two are not limited to verticality, but can also be set at a certain angle to each other. The first direction and the second direction can be specifically set according to the situation, and will not be repeated here.

[0049] According to the oil-gas separation device 100 of an embodiment of the present invention, by setting the oil-gas separation device 100 to include a first container 10 and a second container 20, the first container 10 extends along a first direction, the second container 20 extends along a second direction, the second container 20 communicates with the first container 10, and in the second direction, the width of the second container 20 is greater than the width of the first container 10, the volume of the device can be significantly increased within a given limited space, and the swirling and separation performance of the device can be improved, which is beneficial to the long-term operation of the air compressor.

[0050] In some embodiments, as Figure 2 shown, the oil-gas separation device 100 further includes a swirl stop plate 30. The swirl stop plate 30 is located in the first container 10 and is used to limit the swirling of the liquid level in the first container 10. The swirl stop plate 30 can be a plate body inserted under the liquid level. By separating the liquid level, it can limit the rotation of the liquid level driven by the swirling air flow, and further stabilize the liquid level in the oil-gas separation device 100.

[0051] In some embodiments, as Figure 2 shown, the oil-gas separation device 100 further includes a receiving plate 40. The receiving plate 40 is located in the first container 10. The receiving plate 40 is connected to the swirl stop plate 30 and is arranged above the swirl stop plate 30, and is used to rebound the gas after the separation of the oil-gas mixture. A part of the gas of the oil-gas mixture swirls and descends along the periphery of the first container 10. When it touches the receiving plate 40 and the liquid level, it can rebound and rise from the space near the axis of the first container 10. Another part of the gas swirls and rises along the inner side of the first container 10 until it touches the top of the container, and then rebounds and descends from the space near the side to touch the receiving plate 40 and the liquid level, and finally rebounds and rises from the space near the axis of the first container 10. Therefore, the receiving plate 40 can effectively ensure stable separation performance.

[0052] In some embodiments, the swirl stop plate 30 includes at least one plate member 310. The lower end of each plate member 310 is connected to the barrel wall of the first container 10, and an air flow opening 30a is formed between the upper end of each plate member 310 and the barrel wall of the first container 10. The number of the swirl stop plates 30 can be one or more, which can be specifically set according to needs. For example, when the swirl stop plate 30 is one, the swirl stop plate 30 extends along the second direction, that is, the swirl stop plate 30 is horizontally placed in the liquid level, so as to limit the swirling of the liquid level. The swirl stop plate 30 is connected to the first container 10, that is, the swirl stop plate 30 is integrated on the first container 10, which is convenient for assembling with the second container 20. When the swirl stop plates 30 are multiple, the anti-swirling effect can be enhanced. Among them, the air flow opening 30a can allow the swirling air flow to pass through, avoiding the influence of the swirl stop plate 30 on accelerating the swirling air flow of the extension pipe portion 101.

[0053] In some embodiments, as Figure 2 、 Figure 4As shown, when the anti-rotation plate 30 includes a plurality of plate members 310, the plurality of plate members 310 are arranged at intervals around the barrel wall of the first container 10. The plurality of plate members 310 can divide the liquid surface into a plurality of spaces, and the effect of restricting the rotation of the liquid surface is better. The air flow through openings 30a on each plate member 310 can allow the swirling air flow to pass through, avoiding the influence of the anti-rotation plate 30 on accelerating the swirling air flow of the extension pipe portion 101.

[0054] Specifically, as Figure 4 shown, the anti-rotation plate 30 may include four plate members 310, and the four plate members 310 form a "cross shape". Of course, this is only an example here. The anti-rotation plate 30 may also include three plate members 310 to form a "Y shape", which will not be elaborated here.

[0055] In some embodiments, as Figure 6 shown, the oil-gas separation device 100 further includes an oil separation core 50. The oil separation core 50 is arranged in the first container 10. The oil separation core 50 has a core inlet 501 and a core outlet 502. The core inlet 501 is used to receive the gas after the cyclone separation of the oil-gas mixture, that is, the core inlet 501 is used to receive the swirling upward gas. The core outlet 502 extends outside the first container 10 and is used to discharge the filtered gas.

[0056] In some embodiments, as Figure 2 shown, the air flow through opening 30a is an arc-shaped opening or a triangular notch, and its structure is simple and easy to process.

[0057] In some embodiments, as Figure 3 、 Figure 5 shown, the oil-gas separation device 100 further includes an oil separation core 50. The oil separation core 50 is arranged outside the first container 10. The oil separation core 50 has a core inlet 501 and a core outlet 502. The core inlet 501 is connected to the first container 10 and is used to receive the gas after the cyclone separation of the oil-gas mixture, that is, the core inlet 501 is used to receive the swirling upward gas. The core outlet 502 is used to discharge the filtered gas. By arranging the oil separation core 50 outside, maintenance personnel do not need to disassemble the container during maintenance and can directly replace the components outside, saving a lot of time. In terms of maintenance, after-sales personnel only need to unscrew the lower shell of the externally arranged oil separation core 50 to replace the filter element, which is very convenient.

[0058] In some embodiments, as Figures 1 - 3 shown, a riser pipe 105 is provided on the first container 10, and the riser pipe 105 is connected to the core inlet 501.

[0059] In some embodiments, as Figure 2As shown, the oil-gas separation device 100 further includes a partition barrel 60. The partition barrel 60 is located inside the first container 10 and is connected to the top wall of the first container 10. An isolation chamber 10a is formed between the partition barrel 60 and the inner wall of the first container 10. The first container 10 has a gas-lifting port 104 that communicates with the sub-core inlet 501. The gas-lifting port 104 is connected to a gas-lifting pipe 105. Oil droplets on the inner wall of the first container 10 can be isolated in the isolation chamber 10a. That is, the partition barrel 60 can prevent the oil droplets on the inner wall of the first container 10 from entering the gas-lifting port 104 along with the swirling upward airflow.

[0060] In some embodiments, as Figure 2 shown, an open end 101a is formed at the bottom of the extension pipe portion 101. The width of the extension pipe portion 101 gradually decreases in the direction close to the second container 20. That is to say, one end of the extension pipe portion 101 has a larger width and the other end has a smaller width, presenting a "conical pipe" shape. Among them, the small end of the extension pipe portion 101 is located inside the second container 20. As the air compressor operates for a long time, the oil in the oil-gas separation device 100 is consumed and the liquid level begins to drop. Although most of the swirling gas will touch the receiving plate and rebound, there is still a small part of the gas that will swirl down through the gap near the barrel wall to the liquid surface and then rebound. In this way, the effective separation height between the swirling airflow and the liquid surface is greatly increased, and the swirling airflow speed near the liquid surface also gradually decreases. By setting the extension pipe portion 101, since the space at the end of the extension pipe portion 101 close to the second container 20 decreases, the swirling speed of the swirling airflow can be increased, ensuring good separation performance always maintained even when the liquid level is low.

[0061] In some embodiments, as Figure 2 shown, the anti-rotation plate 30 extends into the extension pipe portion 101, and the lower end of each plate member 310 is connected to the pipe wall of the extension pipe portion 101.

[0062] In some embodiments, as Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 shown, a fuel filling port 102 and a mixture inlet port 103 are provided on the first container 10. The fuel filling port 102 is used to fill the oil-gas separation device 100 with oil, and the mixture inlet port 103 is used to introduce the oil-gas mixture.

[0063] In some embodiments, as Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 shown, an oil return port 201 is provided on the second container 20, which is used to return the oil in the oil-gas separation device 100 to the air compressor.

[0064] In some embodiments, the oil return port 201 can be provided at the bottom of the second container 20, and the bottom of the second container 20 is directly opened for oil return.

[0065] In some embodiments, as Figure 6 shown, the oil return port 201 can also be provided in the middle of the second container 20. At this time, an oil return pipe 202 connecting the oil return port 201 can be provided in the second container 20.

[0066] The following describes specific embodiments of the oil-gas separation device 100 of the present invention with reference to the accompanying drawings.

[0067] Embodiment 1

[0068] As Figures 1 - 6 shown, the oil-gas separation device 100 includes: a first container 10, a second container 20, a anti-rotation plate 30, a receiving plate 40, an oil separation core 50, and a partition barrel 60.

[0069] The first container 10 extends along a first direction and is used for cyclone separating an oil-gas mixture. The second container 20 extends along a second direction, is connected to the first container 10, and is used for storing the liquid oil after cyclone separating the oil-gas mixture and returning oil to an air compressor.

[0070] Wherein, in the second direction, the width of the second container 20 is greater than the width of the first container 10, and the first container 10 has an extension pipe portion 101 extending into the second container 20. The first direction is the up-down direction, the second direction is the left-right direction, and both the first container 10 and the second container 20 are cylindrical barrels with arc-shaped end heads. An opening 101a is formed at the bottom of the extension pipe portion 101, and the width of the extension pipe portion 101 gradually decreases in the direction close to the second container 20.

[0071] The first container 10 is further provided with a fuel filling port 102 and a mixture inlet port 103. The fuel filling port 102 is used for filling oil into the oil-gas separation device 100, and the inlet direction of the mixture inlet port 103 is tangent to the tube wall of the first container 10 for introducing the oil-gas mixture. The second container 20 is provided with an oil return port 201, and the oil return port 201 is used for returning the oil in the oil-gas separation device 100 to the air compressor.

[0072] The anti-rotation plate 30 is located in the first container 10 and is used for restricting the swirling of the liquid level in the first container 10. The receiving plate 40 is connected to the anti-rotation plate 30 and is arranged above the anti-rotation plate 30 for rebounding the gas separated from the oil-gas mixture.

[0073] The anti-rotation plate 30 includes four plate members 310. The four plate members 310 are spaced apart around the barrel wall of the first container 10 and form a "cross shape". An air flow through opening 30a is formed between the upper end of each plate member 310 and the barrel wall of the first container 10. And the air flow through opening 30a is an arc-shaped opening.

[0074] The oil separation core 50 is arranged outside the first container 10. The oil separation core 50 has a sub-core inlet 501 and a sub-core outlet 502. The sub-core inlet 501 is connected to the first container 10 and is used to receive the gas after the cyclone separation of the oil-gas mixture. The sub-core outlet 502 is used to discharge the filtered gas.

[0075] An upcomer 105 is provided on the first container 10, and the upcomer 105 is connected to the sub-core inlet 501.

[0076] The partition barrel 60 is located inside the first container 10 and is connected to the top wall of the first container 10. An isolation chamber 10a is formed between the partition barrel 60 and the inner wall of the first container 10. The first container 10 has an air-lifting port 104 communicating with the sub-core inlet 501. The air inlet direction of the air-lifting port 104 is the same as the axial direction of the partition barrel 60, and the air-lifting port 104 is connected to the upcomer 105.

[0077] Embodiment 2

[0078] As Figure 6 shown, the structure of the oil-gas separation device 100 in Embodiment 2 is substantially the same as that in Embodiment 1, and the same parts will not be described in detail here. Among them, the difference between Embodiment 2 and Embodiment 1 is that: the oil separation core 50 is arranged inside the first container 10. The oil separation core 50 has a sub-core inlet 501 and a sub-core outlet 502. The sub-core inlet 501 is used to receive the gas after the cyclone separation of the oil-gas mixture, that is, the sub-core inlet 501 is used to receive the swirling and rising gas. The sub-core outlet 502 extends outside the first container 10 and is used to discharge the filtered gas.

[0079] The other components and operations of the oil-gas separation device 100 according to the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0080] In the description of this specification, the descriptions with reference to terms such as "some embodiments", "optionally", "further", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0081] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An oil and gas separation device, characterized in that, Comprising: A first container that extends along a first direction and is used for cyclone separation of an oil-gas mixture; A second container that extends along a second direction, is connected to the first container, and is used for storing the liquid oil after cyclone separation of the oil-gas mixture and returning oil to an air compressor; Wherein, in the second direction, the width of the second container is greater than the width of the first container; the first container has an extension pipe portion extending into the second container, and the width of the extension pipe portion gradually decreases in the direction close to the second container; A swirl stop plate that is arranged in the first container and partially extends into the second container along the first direction and is used for restricting the swirling of the liquid levels in the first container and the second container; the swirl stop plate includes at least one plate member, and an air flow opening is formed between the upper end portion of each plate member and the barrel wall of the first container; A receiving plate that is connected to the swirl stop plate and is arranged above the swirl stop plate and is used for rebounding the gas after separation of the oil-gas mixture.

2. The oil and gas separation device according to claim 1, characterized in that, The lower end portion of each plate member is connected to the barrel wall of the first container.

3. The oil and gas separation device according to claim 1, characterized in that, When the swirl stop plate includes a plurality of the plate members, the plurality of plate members are arranged at intervals around the barrel wall of the first container.

4. The oil and gas separation device according to claim 1, characterized in that, Further comprising: An oil separation core that is arranged in the first container and has a gas inlet and a gas outlet. The gas inlet is used for receiving the gas after cyclone separation of the oil-gas mixture, and the gas outlet extends outside the first container and is used for discharging the filtered gas.

5. The oil and gas separation device according to claim 1, characterized in that, Further comprising: An oil separation core that is arranged outside the first container and has a gas inlet and a gas outlet. The gas inlet is connected to the first container and is used for receiving the gas after cyclone separation of the oil-gas mixture, and the gas outlet is used for discharging the filtered gas.

6. The oil and gas separation device according to claim 1, characterized in that, Further comprising: A partition barrel that is located in the first container and is connected to the top wall of the first container. An isolation cavity is formed between the partition barrel and the inner wall of the first container. The first container has a gas lifting port, and the gas lifting port is used for discharging the gas after oil-gas separation.

7. The oil and gas separation device according to claim 1, characterized in that, The swirl stop plate extends into the extension pipe portion, and the lower end portion of each plate member is connected to the pipe wall of the extension pipe portion.

8. The oil and gas separation device according to claim 1, characterized in that, A fuel filling port and a mixture inlet are provided on the first container. The fuel filling port is used for filling oil into the oil-gas separation device, and the mixture inlet is used for introducing the oil-gas mixture.

9. The oil and gas separation device according to claim 1, characterized in that, A return oil port is provided on the second container and is used for returning the oil in the oil-gas separation device to the air compressor.

10. The oil and gas separation device according to claim 9, characterized in that, The return oil port is arranged at the bottom of the second container.

11. The oil and gas separation device according to claim 9, characterized in that, The return oil port is arranged in the middle of the second container, and a return oil pipe is provided in the second container to connect the return oil port.

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