Multi-stage oil mist filtration recovery device

Abstract

The utility model belongs to air compressor accessory technical field provides a kind of multistage oil mist filtering and recycling device, including oil mist recovery cylinder and separating mechanism, oil mist recovery cylinder inside is provided with partition, partition separates and divides into primary division chamber and two division chambers in oil mist recovery cylinder, primary division chamber side wall is equipped with spray inlet, the bottom of primary division chamber is equipped with first oil outlet, connecting hole is equipped on partition, primary division chamber and two division chambers are communicated by connecting hole, the end of partition close to two division chambers is equipped with oil collecting groove, the side wall of two division chambers is equipped with the second oil outlet being communicated with oil collecting groove, the end of two division chambers away from partition is equipped with exhaust port, separating mechanism includes the flow guide cylinder being built into primary division chamber and the first filter element being built into two division chambers, flow guide cylinder is equipped with the flow guide hole being penetrated, flow guide cylinder is connected in the end of partition close to primary division chamber, the first filter element is connected in the end of partition close to two division chambers, flow guide hole and the inner hole of first filter element are communicated by connecting hole, with the characteristics of good filtering effect.

Description

Technical Field

[0001] This utility model relates to the technical field of air compressor accessories, and in particular to a multi-stage oil mist filtration and recovery device. Background Technology

[0002] In the air compression process, the bearings and gearbox of the high-speed rotating screw rotor of an oil-free screw air compressor require oil lubrication and cooling. Because the lubricating oil continuously generates oil mist when supplied to the gearbox, an oil mist recovery device must be added to the oil lubrication circulation system to remove the oil mist from the oil tank. Traditional oil mist treatment methods simply involve leading an oil mist processor out of the upper part of the gearbox through a large pipe, allowing the pressure inside the gearbox to be directly released to the atmosphere. The oil mist then passes through a pipe to the oil mist processor for simple filtration before being discharged into the atmosphere. The collected oil droplets are then reused. However, this method can only handle a small amount of oil mist from the gearbox; most of the oil mist still enters the atmosphere with the venting air, causing pollution. Furthermore, the limited lubricating oil recovery capacity leads to excessive lubricating oil consumption, shortening maintenance cycles and increasing maintenance costs.

[0003] The technical problem to be solved by this utility model is: how to solve the problem of incomplete filtration and limited recovery capacity of oil mist generated by the gearbox and upper bearing of the existing oil-free screw air compressor. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a multi-stage oil mist filtration and recovery device, which improves the purification and recovery efficiency and quality of oil mist by separating and recovering oil mist multiple times.

[0005] The technical solution adopted by this utility model is as follows: a multi-stage oil mist filtration and recovery device, including an oil mist recovery cylinder and a separation mechanism. The oil mist recovery cylinder is provided with a separator, which divides the interior of the oil mist recovery cylinder into a primary separation chamber and a secondary separation chamber. The side wall of the primary separation chamber is provided with a spray inlet, and the bottom of the primary separation chamber is provided with a first oil outlet. The separator is provided with a through connection hole, and the primary separation chamber and the secondary separation chamber are connected through the connection hole. The end of the separator near the secondary separation chamber is provided with an oil collection groove, and the side wall of the secondary separation chamber is provided with a second oil outlet connected to the oil collection groove. The end of the secondary separation chamber away from the separator is provided with an exhaust port. The separation mechanism includes a guide cylinder built into the primary separation chamber and a first filter element built into the secondary separation chamber. The guide cylinder is provided with a through guide hole and is connected to the end of the separator near the primary separation chamber. The spray inlet is located within the radial projection range of the guide cylinder. The first filter element is connected to the end of the separator near the secondary separation chamber, and the guide hole and the inner hole of the first filter element are connected through the connection hole.

[0006] The multi-stage oil mist filtration and recovery device of this application involves spraying oil mist discharged from the gearbox and rotor bearings into the primary separation chamber through the spray inlet. The oil mist swirls around the outer surface of the guide tube, and small oil droplets mixed in the oil mist collide with each other to form larger oil droplets that fall to the bottom of the primary separation chamber. The collected lubricating oil is finally discharged through the first oil outlet and returned to the oil circuit of the air compressor for reuse, completing the first separation of oil mist. After cyclone separation, the oil mist continues to enter the inner hole of the first filter element through the guide hole of the guide tube. The oil droplets intercepted by the first filter element are collected in the oil collection tank and finally discharged through the second oil outlet to return to the oil circuit of the air compressor for reuse, completing the second separation of oil mist. After two separations, the oil mist enters the secondary separation chamber, which greatly reduces the number of oil droplets contained in the oil mist, making the air cleaner. Finally, it is discharged from the secondary separation chamber through the exhaust port.

[0007] In some embodiments, the separation mechanism further includes an exhaust gas processor, which has an air inlet and a third oil outlet at its bottom. The outer surface of the exhaust gas processor has several air holes, and a second filter element is installed inside the exhaust gas processor. The inner hole of the second filter element is connected to the exhaust outlet through the air inlet.

[0008] By adopting the above technical solution, the exhaust gas processor can perform a third filtration and separation on the exhaust gas that has undergone two separations. The oil droplets collected in the inner hole of the second filter element flow back into the two-part chamber through the air inlet, and finally flow into the oil collection tank and are recycled and reused through the second oil outlet. The oil droplets collected on the outer surface of the second filter element flow out of the exhaust gas processor through the third oil outlet for recycling and reuse. Finally, the clean air that has undergone three separations is discharged into the atmosphere through the air holes on the surface of the exhaust gas processor.

[0009] In some implementations, the exhaust gas processor is located at the top of the oil mist recovery cylinder, and the air inlet and exhaust outlet are connected by a connecting pipe.

[0010] By adopting the above technical solution, the exhaust gas processor is placed on top of the oil mist recovery cylinder, which facilitates the recycling and reuse of oil droplets intercepted by the exhaust gas processor.

[0011] In some implementations, the connecting pipe is a rigid pipe.

[0012] Using the above technical solution, the connecting pipe is made of metal or high-temperature and high-pressure resistant rigid plastic. On the one hand, it can ensure the flow of oil mist, and on the other hand, it can fix and support the exhaust gas processor.

[0013] In some implementations, the third oil outlet is connected to the second oil outlet via a return oil pipe, and the return oil pipe is connected to the second oil outlet via a tee.

[0014] Using the above technical solution, the third oil outlet is connected to the second oil outlet through a return oil pipe, which facilitates the collection and reuse of oil droplets intercepted by the exhaust gas processor and the first filter element.

[0015] In some implementations, a valve is provided at the end of the return oil pipe near the third drain port.

[0016] By adopting the above technical solution, the valve remains closed during the separation process and is opened only after the oil mist separation is completed. This prevents the oil mist from entering the exhaust gas processor through the return oil pipe from the two-part chamber, ensuring that the second filter element can perform its filtering function.

[0017] In some implementations, the exhaust port is located on the side of the two-part chamber near the exhaust gas processor.

[0018] By adopting the above technical solution, setting the exhaust port on the side of the two-part chamber can facilitate the oil droplets collected in the inner hole of the second filter element to flow into the oil collection tank through the inside of the two-part chamber.

[0019] In some embodiments, the oil mist recovery cylinder includes a cylinder body and a cylinder cover. The spray inlet, the first oil outlet and the second oil outlet are disposed on the cylinder body. The separator is built into the cylinder body. The cylinder cover is disposed at the end of the cylinder body away from the first oil outlet. The cylinder cover and the cylinder body are detachably connected.

[0020] By adopting the above technical solution, the cylinder cover and cylinder body are designed to be detachably connected, which facilitates the installation and maintenance of the oil mist recovery cylinder.

[0021] In some implementations, the first filter element is detachably connected to the separator.

[0022] The above technical solution facilitates better first filter element.

[0023] In some implementations, the axis of the injection inlet is tangent to the outer peripheral surface of the guide tube.

[0024] By adopting the above technical solution, it can be ensured that the oil mist entering the initial separation chamber will swirl around the guide tube, thereby improving the oil droplet separation effect. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a multi-stage oil mist filtration and recovery device according to a preferred embodiment of the present invention.

[0026] Figure 2 for Figure 1 The diagram shows a multi-stage oil mist filtration and recovery device cut axially along the second oil outlet, where the mounting bracket is not shown.

[0027] Figure 3 for Figure 2 A magnified schematic diagram of the structure at point A shown.

[0028] In the diagram: 100, Multi-stage oil mist filtration and recovery device; 10, Oil mist recovery cylinder; 11, Initial separation chamber; 12, Secondary separation chamber; 13, Separator; 131, Oil collection trough; 14, Injection inlet; 15, First oil outlet; 16, Second oil outlet; 17, Exhaust outlet; 18, Cylinder body; 19, Cylinder cover; 20, Separation mechanism; 21, Guide cylinder; 211, Guide hole; 22, First filter element; 23, Exhaust gas processor; 231, Air inlet; 232, Third oil outlet; 24, Connecting pipe; 25, Return oil pipe; 26, T-junction; 27, Valve; 30, Mounting bracket. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. When the number of elements is referred to as "multiple," it can be any number of two or more. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] Please see Figures 1 to 3A preferred embodiment of the present invention provides a multi-stage oil mist filtration and recovery device 100, comprising an oil mist recovery cylinder 10 and a separation mechanism 20. The oil mist recovery cylinder 10 has a separator 13 inside, dividing the interior of the oil mist recovery cylinder 10 into a primary separation chamber 11 and a secondary separation chamber 12. The primary separation chamber 11 has a spray inlet 14 on its side wall and a first oil outlet 15 at its bottom. The separator 13 has a through connection hole, through which the primary separation chamber 11 and the secondary separation chamber 12 are connected. An oil collection groove 131 is provided at the end of the separator 13 near the secondary separation chamber 12. A second oil outlet 16 communicating with the oil collection tank 131 is provided on the side wall. An exhaust port 17 is provided at the end of the bipartite chamber 12 away from the separator 13. The separation mechanism 20 includes a guide tube 21 built into the primary separation chamber 11 and a first filter element 22 built into the bipartite chamber 12. The guide tube 21 has a through guide hole 211. The guide tube 21 is connected to the end of the separator 13 near the primary separation chamber 11. The spray inlet 14 is located within the radial projection range of the guide tube 21. The first filter element 22 is connected to the end of the separator 13 near the bipartite chamber 12. The guide hole 211 and the inner hole of the first filter element 22 are connected through a connecting hole. The multi-stage oil mist filtration and recovery device 100 of this application separates and recycles the oil droplets mixed in the oil mist through multiple separations, making the gas finally discharged into the atmosphere cleaner and reducing air pollution.

[0033] To further improve the oil mist separation effect and make the emitted gas cleaner, in one embodiment, the separation mechanism 20 also includes an exhaust gas processor 23. The exhaust gas processor 23 has an air inlet 231 and a third oil outlet 232 at its bottom. The outer surface of the exhaust gas processor 23 has several air holes (not shown). The exhaust gas processor 23 has a second filter element (not shown) inside. The inner hole of the second filter element is connected to the exhaust port 17 through the air inlet 231. By setting the exhaust gas processor 23, the exhaust gas that has undergone two separations can be filtered and separated a third time. The oil droplets collected in the inner hole of the second filter element flow back to the two-part chamber 12 through the air inlet 231, and finally flow into the oil collection tank 131 for recycling through the second oil outlet 16. The oil droplets collected on the outer surface of the second filter element flow out of the exhaust gas processor 23 through the third oil outlet 232 for recycling. Finally, the clean air after three separations is discharged into the atmosphere through the air holes on the surface of the exhaust gas processor 23.

[0034] Preferably, the exhaust gas processor 23 is disposed at the top of the oil mist recovery cylinder 10, and the air inlet 231 and the exhaust outlet 17 are connected by a connecting pipe 24. Distributing the exhaust gas processor 23 at the top of the oil mist recovery cylinder 10 facilitates the recovery and reuse of oil droplets intercepted by the exhaust gas processor 23.

[0035] Furthermore, the connecting pipe 24 is a rigid pipe. The connecting pipe 24 is made of metal or high-temperature and high-pressure resistant rigid plastic pipe, which can ensure the flow of oil mist on the one hand, and fix and support the exhaust gas processor 23 through the connecting pipe 24 on the other hand.

[0036] Preferably, to facilitate lubricant recovery, the third oil outlet 232 is connected to the second oil outlet 16 via a return oil pipe 25, and the return oil pipe 25 is connected to the second oil outlet 16 via a tee 26. The connection between the third oil outlet 232 and the second oil outlet 16 via the return oil pipe 25 facilitates the collection and reuse of oil droplets intercepted by the exhaust gas processor 23 and the first filter element 22.

[0037] To prevent cross-contamination, a valve 27 is installed at the end of the oil return pipe 25 near the third oil outlet 232. The valve 27 remains closed during the separation process and is opened only after the oil mist separation is complete. This prevents oil mist from entering the exhaust gas processor 23 from the two-part chamber 12 through the oil return pipe 25, ensuring that the second filter element can perform its filtering function.

[0038] Furthermore, the exhaust port 17 is located on the side of the two-part chamber 12 near the exhaust gas processor 23. Positioning the exhaust port 17 on the side of the two-part chamber 12 facilitates the flow of oil droplets collected in the inner pores of the second filter element through the interior of the two-part chamber 12 into the oil collection tank 131.

[0039] like Figure 1 and Figure 2 As shown, for ease of installation and maintenance, the oil mist recovery cylinder 10 includes a cylinder body 18 and a cylinder cover 19. An inlet 14, a first oil outlet 15, and a second oil outlet 16 are disposed on the cylinder body 18. A separator 13 is built into the cylinder body 18. The cylinder cover 19 is located at the end of the cylinder body 18 away from the first oil outlet 15, and the cylinder cover 19 is detachably connected to the cylinder body 18. This detachable connection between the cylinder cover 19 and the cylinder body 18 facilitates the installation and maintenance of the oil mist recovery cylinder 10.

[0040] Preferably, the first filter element 22 is detachably connected to the separator 13 to facilitate the installation and removal of the first filter element 22.

[0041] Optionally, the first filter element 22 and the separator 13 can be detachably connected by means of threaded connection, snap-fit, magnetic attraction, fastener locking, etc.

[0042] Preferably, the axis of the spray inlet 14 is tangent to the outer peripheral surface of the guide tube 21. This arrangement ensures that the oil mist entering the initial separation chamber 11 swirls around the guide tube 21, improving the oil droplet separation effect.

[0043] In one embodiment, the multi-stage oil mist filtration and recovery device 100 of this application further includes a mounting bracket 30. A connecting seat (not shown in the figure) is provided on the outer side wall of the oil mist recovery cylinder 10. The mounting bracket 30 and the connecting seat are connected by fasteners. In other embodiments, the oil mist recovery cylinder 10 can also be directly fixedly connected to the mounting bracket 30 by welding or other means. By setting the mounting bracket 30, it is convenient to install this filtration and recovery device on an air compressor.

[0044] The multi-stage oil mist filtration and recovery device 100 of this application sprays oil mist discharged from the gearbox and rotor bearings into the primary separation chamber 11 through the spray inlet 14. The oil mist swirls around the outer surface of the guide tube 21, and small oil droplets mixed in the oil mist collide with each other to form larger oil droplets that fall to the bottom of the primary separation chamber 11. The collected lubricating oil is finally discharged through the first oil outlet 15 and returned to the oil circuit of the air compressor for reuse, completing the first separation of oil mist. After cyclone separation, the oil mist continues to enter the inner hole of the first filter element 22 through the guide hole 211 of the guide tube 21. The oil droplets intercepted by the first filter element 22 are collected in the oil collection tank 131 and finally discharged through the second oil outlet 16 and returned to the oil circuit of the air compressor for reuse, completing the second separation of oil mist. After two separations, the oil mist enters the secondary separation chamber 12, which greatly reduces the number of oil droplets contained in the oil mist, making the air cleaner. Then, it passes through the first filter element 22. The filtered exhaust gas enters the exhaust gas processor 23 through the exhaust port 17. The exhaust gas processor 23 performs a third filtration separation on the exhaust gas after the second separation. The oil droplets collected in the inner hole of the second filter element flow back to the two-part chamber 12 through the air inlet 231, and finally flow into the oil collection tank 131 and are recycled and reused through the second oil outlet 16. The oil droplets collected on the outer surface of the second filter element flow out of the exhaust gas processor 23 through the third oil outlet 232 for recycling and reuse. Finally, the clean air after the three separations is discharged into the atmosphere through the air pores on the surface of the exhaust gas processor 23. The multi-stage oil mist filtration and recovery device 100 of this application separates the oil droplets in the oil mist discharged from the air compressor from the air through three separation filtration and recovery, making the gas discharged into the atmosphere cleaner and more environmentally friendly. The oil droplets contained in the oil mist are centrally recycled and reused, reducing the consumption of lubricating oil, extending the protection and maintenance cycle, and helping to reduce maintenance costs.

[0045] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-stage oil mist filtration and recovery device, comprising an oil mist recovery cylinder (10) and a separation mechanism (20), characterized in that, The oil mist recovery cylinder (10) is equipped with a partition (13) that divides the interior of the oil mist recovery cylinder (10) into a primary chamber (11) and a secondary chamber (12). The primary chamber (11) has a spray inlet (14) on its side wall and a first oil outlet (15) at its bottom. The partition (13) has a through-hole that connects the primary chamber (11) and the secondary chamber (12). An oil collection trough (131) is located at one end of the partition (13) near the secondary chamber (12). A second oil outlet (16) communicating with the oil collection trough (131) is located on the side wall of the secondary chamber (12). The two-part chamber (12) is provided with an exhaust port (17) at the end away from the separator (13). The separation mechanism (20) includes a guide tube (21) built into the initial separation chamber (11) and a first filter element (22) built into the two-part chamber (12). The guide tube (21) is provided with a through guide hole (211). The guide tube (21) is connected to the end of the separator (13) near the initial separation chamber (11). The spray inlet (14) is located within the radial projection range of the guide tube (21). The first filter element (22) is connected to the end of the separator (13) near the two-part chamber (12). The guide hole (211) and the inner hole of the first filter element (22) are connected through a connecting hole.

2. The multi-stage oil mist filtration and recovery device according to claim 1, characterized in that, The separation mechanism (20) further includes an exhaust gas processor (23), the bottom of which is provided with an air inlet (231) and a third oil outlet (232), the outer surface of which is provided with a number of air holes, and the exhaust gas processor (23) is provided with a second filter element inside, the inner hole of which is connected to the exhaust outlet (17) through the air inlet (231).

3. The multi-stage oil mist filtration and recovery device according to claim 2, characterized in that, The exhaust gas processor (23) is located on top of the oil mist recovery cylinder (10), and the air inlet (231) and the exhaust outlet (17) are connected by a connecting pipe (24).

4. The multi-stage oil mist filtration and recovery device according to claim 3, characterized in that, The connecting pipe (24) is a rigid pipe.

5. The multi-stage oil mist filtration and recovery device according to claim 3, characterized in that, The third oil outlet (232) is connected to the second oil outlet (16) through the return oil pipe (25), and the return oil pipe (25) is connected to the second oil outlet (16) through the tee (26).

6. The multi-stage oil mist filtration and recovery device according to claim 5, characterized in that, A valve (27) is provided at one end of the return oil pipe (25) near the third drain port (232).

7. The multi-stage oil mist filtration and recovery device according to claim 3, characterized in that, The exhaust port (17) is located on the side of the two-part chamber (12) near the exhaust gas processor (23).

8. The multi-stage oil mist filtration and recovery device according to claim 1, characterized in that, The oil mist recovery cylinder (10) includes a cylinder body (18) and a cylinder cover (19). The spray inlet (14), the first oil outlet (15) and the second oil outlet (16) are disposed on the cylinder body (18). The separator (13) is built into the cylinder body (18). The cylinder cover (19) is disposed at the end of the cylinder body (18) away from the first oil outlet (15). The cylinder cover (19) and the cylinder body (18) are detachably connected.

9. The multi-stage oil mist filtration and recovery device according to claim 8, characterized in that, The first filter element (22) is detachably connected to the separator (13).

10. The multi-stage oil mist filtration and recovery device according to claim 1, characterized in that, The axis of the spray inlet (14) is tangent to the outer circumferential surface of the guide tube (21).

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