Oil-gas separation device and air compression system

Abstract

The utility model relates to the technical field of air compressors, in particular to an oil-gas separation device and an air compression system. The oil-gas separation device comprises a centrifugal structure and an oil-water collection structure, the centrifugal structure comprises a cylinder and an impeller arranged in the cylinder, the cylinder is provided with an inlet and an outlet, and the outlet and the impeller are coaxially arranged; the oil-water collecting structure comprises a collecting pipe, an end cover and an elastic piece; the collecting pipe is communicated with the cylinder body, and a communication port is formed in the side wall of the cylinder body; the collecting pipe comprises a first limiting part and a second limiting part, the second limiting part is located on the side, away from the communicating opening, of the first limiting part, the end cover is located between the communicating opening and the first limiting part, one end of the elastic piece abuts against the second limiting part, and the other end of the elastic piece is connected with the end cover so that the end cover can move in the axial direction of the collecting pipe; when the pressure intensity in the barrel is greater than the atmospheric pressure intensity, the end cover is propped against the first limiting part so as to block the collecting pipe; and when the pressure in the barrel is smaller than or equal to the atmospheric pressure, the end cover is separated from the first limiting part, so that the collection pipe is unblocked.

Description

Technical Field

[0001] The present application relates to the technical field of air compressors, and in particular to an oil-gas separation device and an air compression system. Background Art

[0002] However, for air compressors with high load rates, the internal temperature rises during operation, causing moisture in the inhaled air to condense into water droplets at high temperatures. Furthermore, lubricating oil evaporates at high temperatures, forming oil mist. These water droplets and oil mist are then discharged together, increasing the oil-water content in the exhaust line. If the air compressor exhaust line is directly connected to a dryer, all the oil and water in the exhaust line will enter the dryer, shortening the service life of the dryer filter element.

[0003] To reduce or prevent oil and water from entering the dryer, a condenser is usually installed between the exhaust pipe and the dryer to reduce the amount of oil and water entering the dryer. However, due to the large size of the condenser, it takes up a lot of space and is difficult to use in places with limited space. Utility Model Content

[0004] The present application discloses an oil-gas separation device and an air compression system to solve the problem of using a condenser to reduce or prevent oil and water in the exhaust pipe of an air compressor from entering a dryer and occupying a large amount of space.

[0005] To achieve the above objectives, this application provides the following technical solutions:

[0006] In a first aspect, the present application provides an oil-gas separation device, which includes a centrifugal structure and an oil-water collecting structure. The centrifugal structure includes a cylinder and an impeller arranged in the cylinder, the cylinder is provided with an inlet and an outlet, and the outlet is coaxially arranged with the impeller; the oil-water collecting structure includes a collecting pipe, an end cover and an elastic member, the collecting pipe is connected to the cylinder, and the connecting port is provided on the side wall of the cylinder, and the connecting port is located at one end of the cylinder near the outlet; the collecting pipe includes a first limiting portion and a second limiting portion, the second limiting portion is located on a side of the first limiting portion away from the connecting port, the end cover is located between the connecting port and the first limiting portion, one end of the elastic member abuts against the second limiting portion, and the other end of the elastic member is connected to the end cover so that the end cover can move along the axial direction of the collecting pipe; wherein, when the pressure in the cylinder is greater than the atmospheric pressure, the end cover abuts against the first limiting portion to block the collecting pipe; when the pressure in the cylinder is less than or equal to the atmospheric pressure, the end cover separates from the first limiting portion to unblock the collecting pipe.

[0007] When the air compressor is working, water droplets and oil mist in the exhaust pipe enter the centrifugal structure cylinder through the inlet along with the air. Under the centrifugal action of the impeller, the airflow rotates, and the oil and water with larger mass enter the collection pipe through the connecting port located on the side wall of the cylinder, and the air with smaller mass enters the dryer through the outlet, thereby reducing or preventing the oil and water from entering the dryer. When the air compressor is working, the pressure inside the cylinder is greater than the atmospheric pressure. Under the action of the high-pressure gas, the elastic member is compressed, and the end cover abuts against the first limit part, thereby blocking the collection pipe and ensuring that there is no leakage here; when the air compressor stops working, when the pressure inside the cylinder is equal to the atmospheric pressure, the end cover separates from the first limit part, the collection pipe is unblocked, and the oil and water entering the collection pipe can be discharged through the gap between the end cover and the first limit part. At the same time, because the pressure inside the cylinder is equal to the atmospheric pressure, external unfiltered air is prevented from entering the cylinder.

[0008] Furthermore, the end cover is a trapezoidal block, and the outer diameter of the trapezoidal block gradually decreases along the direction from the first limiting portion to the second limiting portion; the first limiting portion is the limiting section of the collecting tube, and the inner diameter of the limiting section is adapted to the outer diameter of the trapezoidal block so that the end cover and the limiting section can abut against each other.

[0009] Furthermore, the second limiting portion is a limiting step provided on the inner wall of the collecting pipe.

[0010] Furthermore, the inner diameter of the outlet is smaller than the inner diameter of the cylinder.

[0011] Furthermore, the oil-gas separation device also includes an exhaust pipe, which extends into the cylinder through the outlet, and the exhaust pipe is sealedly connected to the cylinder at the outlet, and the exhaust pipe is coaxially arranged with the impeller.

[0012] Furthermore, the exhaust pipe is provided with an air inlet, the air inlet faces the impeller, and the inner diameter of the air inlet is smaller than the diameter of the impeller.

[0013] Furthermore, the exhaust pipe includes a guide section, which is located in the cylinder and has an inner diameter that gradually increases in a direction from the inlet to the outlet.

[0014] Furthermore, the impeller includes blades fixedly connected to the cylinder, and the blades are spiral in shape.

[0015] Furthermore, the communication port is located on the side wall of the bottom of the cylinder.

[0016] In a second aspect, the present application provides an air compression system, which includes an air compressor, a dryer, and the oil-gas separation device of the first aspect, wherein the air compressor is connected to the inlet, and the outlet is connected to the dryer.

[0017] Because the oil-gas separation device in the present application is included, the oil and water in the air discharged from the air compressor are separated by the oil-gas separation device, the air enters the dryer through the outlet, and the oil and water enter the collecting pipe through the connecting port, thereby reducing or preventing the oil and water from entering the dryer, thereby improving the service life of the dryer filter element, and further improving the service life of the air compression system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of an oil-gas separation device according to an embodiment of the present application;

[0019] Figure 2 This is a structural schematic diagram of a collecting pipe in a blocked state according to an embodiment of the present application;

[0020] Figure 3 This is a structural schematic diagram of a collecting pipe in an embodiment of the present application in an unblocked state;

[0021] Figure 4 This is a structural schematic diagram of an oil-gas separation device according to another embodiment of the present application;

[0022] Figure 5 This is a structural schematic diagram of an oil-gas separation device according to another embodiment of the present application;

[0023] Figure 6 This is a schematic structural diagram of an air compression system according to an embodiment of the present application.

[0024] Reference numerals: 100 - centrifugal structure; 110 - cylinder; 120 - impeller; 121 - blades; 200 - oil-water collection structure; 210 - collection pipe; 211 - first limiting portion; 212 - second limiting portion; 220 - end cover; 230 - elastic member; 300 - exhaust pipe; 310 - guide section;

[0025] 10-Oil-gas separation device; 20-Air compressor; 21-Exhaust connector; 30-Dryer;

[0026] 01-inlet; 02-outlet; 03-connecting port; 04-air inlet. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0028] Figure 1 This is a structural diagram of an oil-gas separation device according to an embodiment of the present application. Figure 2 This is a structural diagram of a collecting pipe in a blocked state according to an embodiment of the present application. Figure 3 This is a structural diagram of the collecting tube in an embodiment of the present application in an unblocked state. Please refer to Figures 1 to 3 In an embodiment of the present application, an oil-gas separation device 10 is provided, which includes a centrifugal structure 100 and an oil-water collecting structure 200. The centrifugal structure 100 includes a cylinder 110 and an impeller 120 arranged in the cylinder 110. The cylinder 110 is provided with an inlet 01 and an outlet 02, and the outlet 02 is coaxially arranged with the impeller 120. The oil-water collection structure 200 includes a collection pipe 210, an end cover 220 and an elastic member 230. The collection pipe 210 is connected to the cylinder 110 and the connecting port 03 is provided on the side wall of the cylinder 110. The connecting port 03 is located at one end of the cylinder 110 close to the outlet 02; the collection pipe 210 includes a first limiting portion 211 and a second limiting portion 212. The second limiting portion 212 is located on the side of the first limiting portion 211 away from the connecting port 03. The end cover 220 is located between the connecting port 03 and the first limiting portion 211. One end of the elastic member 230 abuts against the second limiting portion 212, and the other end of the elastic member 230 is connected to the end cover 220 so that the end cover 220 can move along the axial direction of the collection pipe 210. Among them, when the pressure inside the cylinder 110 is greater than the atmospheric pressure, the end cover 220 abuts against the first limiting portion 211 to block the collection pipe 210; when the pressure inside the cylinder 110 is less than or equal to the atmospheric pressure, the end cover 220 separates from the first limiting portion 211 to unblock the collection pipe 210.

[0029] The oil-gas separation device 10 in the present application is usually arranged between the air compressor and the dryer, and is used to separate the oil, water and air in the exhaust pipe of the air compressor.

[0030] Specifically, if Figure 1 As shown, when the air compressor 20 is working, the water droplets and oil mist in the exhaust pipe enter the cylinder 110 of the centrifugal structure 100 through the inlet 01 along with the air. Under the centrifugal action of the impeller 120, the air flow rotates, and the oil and water with a larger mass flow along the direction indicated by the arrow C in the figure through the connecting port 03 located on the side wall of the cylinder 110 into the collecting pipe 210, and the air with a smaller mass flows along the direction indicated by the arrow B and enters the dryer through the outlet 02, thereby reducing or preventing the oil and water from entering the dryer.

[0031] The impeller 120 includes blades 121 fixedly connected to the barrel 110. The blades 121 are spirally shaped, so that the air and oil and water passing through the blades 121 rotate, thereby achieving a centrifugal effect. The impeller 120 in this application has a simple structure and only requires the spiral blades 121. The number of blades 121 is set according to actual needs.

[0032] At this time, the communication port 03 is located on the side wall of the bottom of the cylinder 110 , because the oil and water after centrifugal separation will flow toward the bottom of the cylinder 110 under the action of gravity, and thus enter the collection pipe 210 through the communication port 03 .

[0033] In some optional embodiments, the impeller 120 may include a rotating shaft and blades fixed to the rotating shaft, and the rotation of the impeller 120 exerts a centrifugal effect on the air and oil and water.

[0034] like Figure 2 As shown, when the air compressor is working, the pressure inside the cylinder 110 is greater than the atmospheric pressure. Under the action of the high-pressure gas, the elastic member 230 is compressed, and the end cover 220 abuts against the first limiting portion 211, thereby blocking the collecting pipe 210 to ensure that there is no leakage here.

[0035] Among them, the end cover 220 is located between the connecting port 03 and the first limiting portion 211, that is, the end cover 220 is located in the collecting tube 210. When the end cover 220 abuts against the first limiting portion 211, oil and water can be stored in the collecting tube 210 between the end cover 220 and the connecting port 03.

[0036] like Figure 3 As shown, when the air compressor stops operating and the pressure within cylinder 110 equals atmospheric pressure, elastic member 230 drives end cap 220 to move away from first stop 211, thereby separating end cap 220 from first stop 211 and unblocking collection pipe 210. Oil and water that have entered collection pipe 210 can be discharged through the gap between end cap 220 and first stop 211. At the same time, because the pressure within cylinder 110 equals atmospheric pressure, unfiltered air from the outside is prevented from entering cylinder 110.

[0037] In some optional embodiments, the elastic member 230 may be a compression spring or a metal spring, etc., and may be configured according to actual needs.

[0038] It can be understood that the specific structure of the end cover 220 and the first limiting portion 211 is not limited in this application, as long as the end cover 220 and the first limiting portion 211 can cooperate with each other to block the collection pipe 210.

[0039] Continue to refer to Figure 2 and Figure 3The end cap 220 is a trapezoidal block, with its outer diameter gradually decreasing as the first limiting portion 211 points toward the second limiting portion 212. The first limiting portion 211 serves as the limiting section of the collection tube 210. The inner diameter of the limiting section matches the outer diameter of the trapezoidal block, allowing the end cap 220 to abut against the limiting section. The trapezoidal structure of the end cap 220 and the first limiting portion 211 provides a larger contact area, allowing it to withstand greater pressure, thereby extending its service life. Furthermore, the first limiting portion 211 of the aforementioned structure also serves to guide the discharge of oil and water.

[0040] In some possible embodiments, the shape of the end cover 220 may also be a rectangular parallelepiped. Correspondingly, the first limiting portion 211 is an annular protrusion provided on the inner wall of the collecting tube 210 .

[0041] You can continue to refer to Figure 2 and Figure 3 The second limiting portion 212 is a limiting step provided on the inner wall of the collecting tube 210. The elastic member 230 abuts against the step surface of the limiting step.

[0042] In some optional embodiments, such as Figure 1 As shown, the inner diameter of the outlet 02 is smaller than the inner diameter of the cylinder 110. Specifically, the ratio of the inner diameter of the outlet 02 to the diameter of the impeller 120 needs to be smaller than a first preset value, thereby reducing or preventing oil and water from entering the dryer 30 through the outlet 02. The first preset value is set according to actual needs.

[0043] In some other optional embodiments, Figure 4 This is a structural diagram of an oil-gas separation device according to another embodiment of the present application. Figure 5 This is a structural diagram of an oil-gas separation device according to another embodiment of the present application. Figure 4 and Figure 5 As shown, the oil-gas separation device 10 further includes an exhaust pipe 300 , which extends into the cylinder 110 through the outlet 02 , and the exhaust pipe 300 is sealedly connected to the cylinder 110 at the outlet 02 , and the exhaust pipe 300 is coaxially arranged with the impeller 120 .

[0044] Continue to refer to Figure 4 The exhaust pipe 300 is provided with an air inlet 04, which faces the impeller 120. The inner diameter of the air inlet 04 is smaller than the diameter of the impeller 120, so that the air separated by centrifugal action enters the exhaust pipe 300, and at the same time, reduces or prevents oil and water from entering the exhaust pipe 300.

[0045] In some optional embodiments, the exhaust pipe 300 includes a guide section 310, which is located inside the cylinder 110 and points from the inlet 01 to the outlet 02. The inner diameter of the guide section 310 gradually increases, thereby reducing exhaust resistance, improving air circulation efficiency, and reducing exhaust noise.

[0046] Based on the same technical concept, the embodiment of the present application also provides an air compression system. Figure 6 This is a schematic diagram of the structure of an air compression system according to an embodiment of the present application. Figure 6 The air compression system includes an air compressor 20, a dryer 30 and an oil-gas separation device 10 in various possible embodiments of the present application. The air compressor 20 is connected to the inlet 01 of the oil-gas separation device 10, and the outlet 02 of the oil-gas separation device 10 is connected to the dryer 30.

[0047] Continue to refer to Figure 6 The air compressor 20 includes an exhaust connector 21. The oil-gas separation device 10 in this application is arranged behind the exhaust connector 21. The air and oil-water mixture discharged from the air compressor 20 enter the interior of the cylinder 110 through the inlet 01. After separation by the oil-gas separation device 10, the air is discharged through the outlet 02 and enters the dryer 30.

[0048] Because the air compression system includes the oil-gas separation device 10 of the present application, it also has the following advantages:

[0049] 1) Reduce or prevent oil and water from entering the dryer 30, thereby increasing the service life of the filter element of the dryer 30;

[0050] 2) The oil-gas separation device 10 is cleverly designed, has a simple structure, and occupies a small space, so that the air compression system can occupy less layout space.

[0051] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations.

Claims

1. An oil-gas separation device, characterized in that: It includes a centrifugal structure and an oil-water collecting structure, wherein the centrifugal structure includes a cylinder and an impeller arranged in the cylinder, the cylinder is provided with an inlet and an outlet, and the outlet is coaxially arranged with the impeller; The oil-water collection structure includes a collection pipe, an end cover, and an elastic member, wherein the collection pipe is connected to the cylinder and a communication port is provided on the side wall of the cylinder, and the communication port is located at an end of the cylinder close to the outlet; the collection pipe includes a first limiting portion and a second limiting portion, the second limiting portion is located on a side of the first limiting portion away from the communication port, the end cover is located between the communication port and the first limiting portion, one end of the elastic member abuts against the second limiting portion, and the other end of the elastic member is connected to the end cover so that the end cover can move along the axial direction of the collection pipe; When the pressure inside the cylinder is greater than the atmospheric pressure, the end cover abuts against the first limiting portion to block the collecting pipe; When the pressure in the cylinder is less than or equal to the atmospheric pressure, the end cover is separated from the first limiting portion to release the blockage of the collecting pipe.

2. The oil-gas separation device according to claim 1, characterized in that: The end cover is a trapezoidal block, and the outer diameter of the trapezoidal block gradually decreases along the direction from the first limiting portion to the second limiting portion; The first limiting portion is a limiting section of the collecting tube, and the inner diameter of the limiting section is adapted to the outer diameter of the trapezoidal block so that the end cover can abut against the limiting section.

3. The oil-gas separation device according to claim 1, characterized in that: The second limiting portion is a limiting step provided on the inner wall of the collecting tube.

4. The oil-gas separation device according to any one of claims 1 to 3, characterized in that: The inner diameter of the outlet is smaller than the inner diameter of the cylinder.

5. The oil-gas separation device according to any one of claims 1 to 3, characterized in that: The oil-gas separation device further includes an exhaust pipe, which extends into the cylinder through the outlet and is sealedly connected to the cylinder at the outlet. The exhaust pipe is coaxially arranged with the impeller.

6. The oil-gas separation device according to claim 5, characterized in that: The exhaust pipe is provided with an air inlet, the air inlet faces the impeller, and the inner diameter of the air inlet is smaller than the diameter of the impeller.

7. The oil-gas separation device according to claim 6, characterized in that: The exhaust pipe includes a guide section, which is located in the cylinder and gradually increases in the direction from the inlet to the outlet.

8. The oil-gas separation device according to claim 1, characterized in that: The impeller includes blades fixedly connected to the cylinder, and the blades are spiral in shape.

9. The oil-gas separation device according to claim 8, characterized in that: The communication port is located on the side wall of the bottom of the cylinder.

10. An air compression system, characterized in that: The air compression system includes an air compressor, a dryer, and the oil-gas separation device according to any one of claims 1 to 9, the air compressor is connected to the inlet, and the outlet is connected to the dryer.

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