Negative pressure adjustable jet type oil mist separator filter element

Abstract

The utility model relates to the technical field of oil mist separation, in particular to a negative pressure adjustable jet type oil mist separator filter element which comprises an outer filter layer and an inner filter layer arranged in the outer filter layer, an end cover is detachably connected to the outer filter layer, and a filter cavity is formed between the end cover and the inner wall of the outer filter layer. The end cover is further provided with an air inlet pipe and an oil outlet pipe, the air inlet pipe and the oil outlet pipe penetrate through the wall body of the end cover and are communicated with the filtering cavity, a supporting shell is arranged at the end, close to the end cover, in the filtering cavity, an oil mist collecting cavity is formed between the inner wall of the supporting shell and the end cover, and a collecting opening is formed in the face, away from the end cover, of the supporting shell. The collecting opening penetrates through the wall body of the supporting shell, the filtering cavity is communicated with the oil mist collecting cavity, a spoiler is arranged on a port, located at the collecting opening, of the air inlet pipe, a first filtering bag and a second filtering bag are arranged on the face, away from the end cover, of the supporting shell, the first filtering bag is located at the collecting opening, and the second filtering bag is located at the second filtering bag. The second filter bag is positioned outside the first filter bag and is close to the inner filter layer.

Description

Technical Field

[0001] The utility model relates to the technical field of oil mist separation, in particular to a filter element of a negative pressure adjustable jet type oil mist separator. Background Art

[0002] An oil mist separator is a commonly used oil fume separation device in industry, also known as an oil mist recovery machine and an oil mist collector. It is often installed on various machining equipment such as CNC machining centers, washing machines, die-casting machines, and CNC lathes to remove visible oil fumes generated in the internal lubricating oil system during the high-speed operation of the equipment, so as to purify the air and protect the health of workers. For traditional oil mist filtering devices applied to machine tool processing, the filter elements with a simple structure are generally arranged in layers, with low separation efficiency for oil mist, poor separation effect, and easy to be blocked; for oil mist filtering devices with high separation efficiency or not easy to be blocked, the internal filter elements are often replaceable. For example, a new type of oil mist separation filter element disclosed in Chinese Patent CN216023771U includes a filtering inner net, a filter core, and a filtering outer net with an opening at one end arranged in sequence from inside to outside. A filter element cavity is formed inside the filtering inner net. A end cover is covered at the opening of the filtering outer net, and an air inlet pipe communicating with the filter element cavity is arranged on the end cover. A flow disturbing device is arranged in the filter element cavity. The flow disturbing device includes a flow disturbing plate in a conical cover structure, and at least two uniformly distributed drainage openings are arranged on the flow disturbing plate. A spiral cold water pipe is wound outside the filtering outer net. The above patent is a filter element that is easy to disassemble and replace. However, due to the poor fluidity of oil mist, the oil mist adhered to the filter element cannot flow out quickly, resulting in too frequent replacement and affecting the service life.

[0003] Therefore, it is necessary for those skilled in the art to provide a filter element of a negative pressure adjustable jet type oil mist separator to improve the discharge speed of internal oil mist, reduce the replacement frequency, and improve the service life. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a filter element of a negative pressure adjustable jet type oil mist separator to solve the technical problem that in the prior art, due to the poor fluidity of oil mist, the oil mist adhered to the filter element cannot flow out quickly, resulting in too frequent replacement of the filter element of the negative pressure adjustable jet type oil mist separator and affecting the service life.

[0005] The technical solution adopted by the present utility model to solve its technical problems is as follows: A negative pressure adjustable jet oil mist separator filter element includes an outer filter layer and an inner filter layer disposed within the outer filter layer. An end cap is detachably connected to the outer filter layer, and a filter cavity is formed between the end cap and the inner wall of the outer filter layer body. The end cap is further provided with an air inlet pipe and an oil outlet pipe, and the air inlet pipe and the oil outlet pipe penetrate through the wall of the end cap and communicate with the filter cavity. A support shell is provided at one end of the filter cavity close to the end cap, and an oil mist collection cavity is formed between the inner wall of the support shell and the end cap. A collection port is provided on the side of the support shell away from the end cap, and the collection port penetrates through the wall of the support shell. The filter cavity and the oil mist collection cavity communicate with each other. A spoiler is provided at the port of the air inlet pipe located at the collection port. A first filter bag and a second filter bag are provided on the side of the support shell away from the end cap. The first filter bag is located at the collection port, and the second filter bag is located outside the first filter bag and close to the inner filter layer.

[0006] Further, the spoiler is in a conical shape, and through holes and through grooves are formed on the spoiler. The through holes and through grooves penetrate through the wall of the spoiler. The through groove is in a linear shape and is provided in the middle of the spoiler. A plurality of through holes are provided and are evenly distributed on both sides of the through groove.

[0007] Further, a guiding boss is provided on the inner wall of the air inlet pipe close to the spoiler. The guiding boss is in a ring shape. A liquid drainage notch is formed above the guiding boss on the air inlet pipe, and the liquid drainage notch penetrates through the wall of the air inlet pipe and communicates with the oil mist collection cavity. The surface of the guiding boss facing the spoiler is an inclined surface, and the inclined surface inclines towards the liquid drainage notch.

[0008] Further, a first guiding groove is also formed on the spoiler, and the first guiding groove is opened downward from the upper surface of the spoiler.

[0009] Further, one end of the air inlet pipe is located within the oil mist collection cavity and extends to the collection port, and the air inlet pipe faces the filter cavity.

[0010] Further, both the first filter bag and the second filter bag are in a conical bag-like structure with one open end. A waist-shaped through port and a second guiding groove are further provided on the side of the support shell away from the end cap. The waist-shaped through port and the second guiding groove are located between the first filter bag and the second filter bag.

[0011] Further, the waist-shaped through port penetrates through the wall of the support shell and communicates with the oil mist collection cavity. The second guiding groove is opened downward from the upper plane of the support shell, and the second guiding groove communicates with the waist-shaped through port.

[0012] Further, both the first filter bag and the second filter bag are made of glass fiber, and the filtering pore diameters of the first filter bag and the second filter bag are 0.3 - 2 μm.

[0013] Further, the outer filter layer is in a cylindrical shell-like structure with one open end, and a filter core is provided between the outer filter layer and the inner filter layer.

[0014] The beneficial effects of the present utility model are as follows: The present utility model can directly use the spoiler to intercept most of the high-temperature oil mist in an intercepting manner, greatly improving the interception efficiency. At the same time, the first filter bag and the second filter bag are used to collect the oil mist entering the filter cavity twice to ensure the sufficiency of separation. Compared with the interception and recovery of the spoiler, since the temperature of the oil mist entering the filter cavity decreases, a large amount of oil mist will adhere. Therefore, a double-layer filtration method is adopted to ensure the stability and sufficiency of oil mist filtration. At the same time, to improve the fluidity of the liquefied oil mist after cooling, the present utility model also opens a second guiding groove on the upper plane of the support shell to ensure that the liquefied oil mist can flow and gather quickly, thereby improving the recovery efficiency. Description of the Drawings

[0015] Figure 1 is the main cross-sectional view of the negative-pressure adjustable jet-type oil mist separator filter element of the present utility model.

[0016] Figure 2 is Figure 1 the isometric schematic view of

[0017] Figure 3 is Figure 1 the cross-sectional view along A-A in

[0018] Figure 4 is Figure 3 the isometric schematic view of

[0019] Figure 5 is Figure 1 the partial enlarged schematic view of part B in

[0020] Figure 6 is Figure 2 the partial enlarged schematic view of part C in

[0021] Figure 7 is Figure 2 the partial enlarged schematic view of part D in

[0022] The marks of each component in the drawings are as follows: 10, outer filter layer; 11, filter core; 12, inner filter layer; 13, filter cavity; 14, oil mist collection cavity; 15, end cover; 16, first filter bag; 17, second filter bag; 18, oil outlet pipe; 19, air inlet pipe; 20, support shell; 21, collection port; 22, spoiler; 23, through hole; 24, through groove; 25, first guiding groove; 26, guiding boss; 27, drain notch; 28, kidney-shaped through port; 29, second guiding groove. Detailed Embodiments

[0023] The present utility model will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present utility model in a schematic manner. Therefore, it only shows the components related to the present utility model.

[0024] Please refer to Figure 1 、 Figure 2 The present utility model provides a negative pressure adjustable jet type oil mist separator filter element, which includes an outer filter layer 10 and an inner filter layer 12 arranged inside the outer filter layer 10. A filter core 11 is arranged between the outer filter layer 10 and the inner filter layer 12. The outer filter layer 10 is in the shape of a cylindrical shell structure with one open end. A end cover 15 is detachably connected to the open surface of the outer filter layer 10. A filter cavity 13 is formed between the end cover 15 and the inner wall of the outer filter layer body 10. An air inlet pipe 19 and an oil outlet pipe 18 are further arranged on the end cover 15. The air inlet pipe 19 and the oil outlet pipe 18 penetrate through the wall body of the end cover 15 and communicate with the filter cavity 13.

[0025] During use, the oil mist is introduced into the filter cavity 13 from the air inlet pipe 19. The filter core 11 intercepts the oil mist and liquefies it into a liquid state. The liquefied oil mist converges and flows out from the oil outlet pipe 18, completing the filtration of the oil mist, achieving the purification of air and also recovering part of the lubricating oil at the same time.

[0026] In this embodiment, the inner filter layer 12 is made of a combination of multiple mesh sheets, and the filtration aperture is 10 - 20 μm. The filter core 11 is made of glass fiber, and the filtration aperture is 2 - 10 μm. The outer filter layer 10 is made of metal wire mesh, and the filtration aperture is 10 - 20 μm. By setting multiple layers and multiple stages of filtration devices, the first stage of filtration can capture oil mist above 0.3 μm, the second stage of filtration can capture oil mist above 2 μm, and the third stage of filtration can capture oil mist above 10 μm. The present utility model can achieve full filtration of oil mist with different particle sizes, ensuring the filtration effect and filtration range.

[0027] In this embodiment, a sealing gasket made of flame retardant rubber (not shown in the figure) is further arranged between the outer filter layer 10 and the end cover 15 to ensure the sealing performance between the outer filter layer 10 and the end cover 15.

[0028] Please refer to Figure 3 、 Figure 4 ,A support shell 20 is arranged at one end of the filter cavity 13 close to the end cover 15. The support shell 20 is in the shape of a cylindrical shell structure with one open end. The open surface of the support shell 20 abuts against the end cover 15. An oil mist collection cavity 14 is formed between the inner wall of the support shell 20 and the end cover 15.

[0029] Further, a collection port 21 is provided on a surface of the support shell 20 away from the end cap 15. The collection port 21 penetrates through the wall of the support shell 20, and the filter chamber 13 communicates with the oil mist collection chamber 14 through the collection port 21. One end of the intake pipe 19 is located in the oil mist collection chamber 14 and extends to the collection port 21. The intake pipe 19 faces the filter chamber 13, and the oil outlet pipe 18 communicates with the oil mist collection chamber 14. During use, the oil mist is introduced into the filter chamber 13 through the intake pipe 19. The filter element 11 intercepts the oil mist and liquefies it into a liquid state. The liquefied oil mist flows into the oil mist collection chamber 14 and finally flows out through the oil outlet pipe 18. By protruding the intake pipe 19 into the oil mist collection chamber 14, the present utility model prevents the liquefied oil mist from flowing back through the intake pipe 19, thereby ensuring the stability of equipment use. At the same time, the present utility model also extends the intake pipe 19 to the collection port 21, enabling the oil mist ejected from the intake pipe 19 to directly enter the filter chamber 13, reducing the direct entry of oil mist into the oil mist collection chamber 14, thereby preventing the disturbance of the liquefied oil mist in the oil mist collection chamber 14, improving the discharge fluency, and ensuring the stability of equipment use.

[0030] Further, a spoiler 22 is provided on the port of the intake pipe 19 at the collection port 21. The spoiler 22 is conical. Through holes 23 and through grooves 24 are formed in the spoiler 22. The through holes 23 and through grooves 24 penetrate through the wall of the spoiler 22. The through groove 24 is linear and is provided in the middle of the spoiler 22. A plurality of through holes 23 are provided and are evenly distributed on both sides of the through groove 24.

[0031] A guiding boss 26 is provided on the inner wall of the intake pipe 19 near the spoiler 22. The guiding boss 26 is annular. A liquid discharge notch 27 is formed above the guiding boss 26 on the intake pipe 19. The liquid discharge notch 27 penetrates through the wall of the intake pipe 19 and communicates with the oil mist collection chamber 14. The surface of the guiding boss 26 facing the spoiler 22 is an inclined surface, and the inclined surface inclines towards the liquid discharge notch 27.

[0032] During use, the spoiler 22 intercepts the oil mist ejected from the intake pipe 19. Since the oil mist has a certain temperature at this time, when the high-temperature oil mist contacts the inner wall of the spoiler 22, the high-temperature oil mist will liquefy into a liquid and collect on the inner wall of the spoiler 22. The conical spoiler 22 causes the liquid oil mist to flow from the inner wall of the spoiler 22 to the surrounding areas and then gradually collect into the guiding boss 26, and finally drain into the oil mist collection chamber 14 through the liquid discharge notch 27, realizing the preliminary recovery of the oil mist. Since the high-temperature oil mist has excellent fluidity, most of the high-temperature oil mist can be intercepted directly by using the spoiler 22 in an intercepting manner, greatly improving the interception efficiency. At the same time, some oil mist will also be discharged into the filter chamber 13 through the through holes 23 and through grooves 24 to achieve air exchange.

[0033] A first guiding groove 25 is further formed in the spoiler 22 and extends downward from the upper surface of the spoiler 22. In this way, when the liquefied oil mist drops onto the spoiler 22, the oil mist can quickly gather in the first guiding groove 25, preventing the oil mist from condensing and blocking the through holes 23 and the through grooves 24, and ensuring the stable use of the present utility model.

[0034] A first filter bag 16 and a second filter bag 17 are provided on a surface of the support shell 20 away from the end cover 15. The first filter bag 16 and the second filter bag 17 are both in a conical bag-like structure with one open side. The first filter bag 16 is located at the collection port 21, and the second filter bag 17 is located outside the first filter bag 16 and close to the inner filter layer 12. The first filter bag 16 and the second filter bag 17 are both made of glass fiber, and the filtering pore diameters of the first filter bag 16 and the second filter bag 17 are 0.3 - 2 μm. In this way, most of the oil mist can be filtered and intercepted, improving the oil mist separation effect and achieving primary filtration.

[0035] A waist-shaped through port 28 and a second guiding groove 29 are further provided on a surface of the support shell 20 away from the end cover 15. The waist-shaped through port 28 and the second guiding groove 29 are located between the first filter bag 16 and the second filter bag 17. The waist-shaped through port 28 penetrates the wall of the support shell 20 and communicates with the oil mist collection chamber 14. The second guiding groove 29 extends downward from the upper plane of the support shell 20, and the second guiding groove 29 communicates with the waist-shaped through port 28. In this way, the liquid oil mist dripping from the inner wall of the first filter bag 16 will flow into the oil mist collection chamber 14 from the collection port 21, and the liquid oil mist dripping from the second filter bag 17 can smoothly gather in the second guiding groove 29 and flow into the oil mist collection chamber 14 from the waist-shaped through port 28, completing the oil mist collection. In this embodiment, a plurality of the waist-shaped through ports 28 and the second guiding grooves 29 are provided and are evenly arranged around the axis of the support shell 20, thereby improving the recovery efficiency.

[0036] The present utility model utilizes the first filter bag 16 and the second filter bag 17 to perform secondary collection on the oil mist entering the filtration chamber 13, ensuring the sufficiency of separation. Compared with the interception and recovery of the spoiler 22, since the temperature of the oil mist entering the filtration chamber 13 decreases, a large amount of the oil mist will adhere. The present utility model ensures the stability and sufficiency of oil mist filtration by arranging the first filter bag 16 and the second filter bag 17 and adopting a double-layer filtration method. At the same time, to improve the fluidity of the liquefied oil mist after cooling, the present utility model also opens a second guiding groove 29 on the upper plane of the support shell 20 to ensure that the liquefied oil mist can quickly flow and gather, thereby improving the recovery efficiency.

[0037] The specific operation method of the present utility model is as follows: Step 1: Introduce oil mist into the filtration chamber 13 through the intake pipe 19, and perform preliminary interception and filtration using the spoiler 22. The high-temperature oil mist will liquefy into a liquid and flow from the inner wall of the spoiler 22 to the surroundings, and then gradually gather into the guiding boss 26, and finally drain into the oil mist collection chamber 14 through the liquid discharge notch 27, realizing the preliminary recovery of the oil mist.

[0038] Step 2: The oil mist introduced into the filtration chamber 13 is intercepted and filtered using the first filter bag 16 and the second filter bag 17. The liquid oil mist dripping from the inner wall of the first filter bag 16 will flow into the oil mist collection chamber 14 through the collection port 21, and the liquid oil mist dripping from the inner wall of the second filter bag 17 can smoothly gather into the second guiding groove 29 and flow into the oil mist collection chamber 14 through the waist-shaped through opening 28, completing the collection of the oil mist.

[0039] Step 3: The liquid oil mist gathers in the oil mist collection chamber 14 and flows out through the oil outlet pipe 18, completing the filtration, collection, and reuse of the oil mist.

[0040] The present utility model can directly intercept most of the high-temperature oil mist in an interception manner by using the spoiler 22, greatly improving the interception efficiency. At the same time, the first filter bag 16 and the second filter bag 17 are used to perform secondary collection on the oil mist entering the filtration chamber 13 to ensure the sufficiency of separation. Compared with the interception and recovery of the spoiler 22, since the temperature of the oil mist entering the filtration chamber 13 decreases, a large amount of oil mist will adhere. Therefore, a double-layer filtration method is adopted to ensure the stability and sufficiency of the oil mist filtration. At the same time, to improve the fluidity of the liquefied oil mist after cooling, the present utility model also opens a second guiding groove 29 on the upper plane of the support shell 20 to ensure that the liquefied oil mist can flow and gather quickly, thereby improving the recovery efficiency.

[0041] It can be understood that the present utility model is described through some embodiments. Those skilled in the art know that without departing from the spirit and scope of the present utility model, various changes or equivalent replacements can be made to these features and embodiments. In addition, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.

Claims

1. A negative pressure adjustable jet type oil mist separator filter element, comprising an outer filter layer (10) and an inner filter layer (12) arranged inside the outer filter layer (10). An end cap (15) is detachably connected to the outer filter layer (10), and a filter cavity (13) is formed between the end cap (15) and the inner wall of the outer filter layer (10). The end cap (15) is further provided with an air inlet pipe (19) and an oil outlet pipe (18). The air inlet pipe (19) and the oil outlet pipe (18) penetrate through the wall of the end cap (15) and communicate with the filter cavity (13). It is characterized in that, One end of the filtering cavity (13) close to the end cover (15) is provided with a support shell (20). An oil mist collection cavity (14) is formed between the inner wall of the support shell (20) and the end cover (15). A collection port (21) is provided on the surface of the support shell (20) away from the end cover (15). The collection port (21) penetrates through the wall of the support shell (20). The filtering cavity (13) is in communication with the oil mist collection cavity (14). A spoiler plate (22) is provided on the port of the intake pipe (19) at the position of the collection port (21). A first filter bag (16) and a second filter bag (17) are provided on the surface of the support shell (20) away from the end cover (15). The first filter bag (16) is located at the collection port (21). The second filter bag (17) is located outside the first filter bag (16) and close to the inner filter layer (12).

2. The negative pressure adjustable jet type oil mist separator filter element according to claim 1, wherein The spoiler plate (22) is conical. Through holes (23) and through grooves (24) are formed in the spoiler plate (22). The through holes (23) and the through grooves (24) penetrate through the wall of the spoiler plate (22). The through groove (24) is in a shape of a straight line and is arranged in the middle of the spoiler plate (22). There are multiple through holes (23) which are evenly arranged on both sides of the through groove (24).

3. The negative pressure adjustable jet type oil mist separator filter element according to claim 1, characterized in that, A guiding boss (26) is provided on the inner wall of the intake pipe (19) close to the spoiler plate (22). The guiding boss (26) is annular. A liquid discharge notch (27) is formed above the guiding boss (26) on the intake pipe (19). The liquid discharge notch (27) penetrates through the wall of the intake pipe (19) and is in communication with the oil mist collection cavity (14). The surface of the guiding boss (26) facing the spoiler plate (22) is an inclined surface, and the inclined surface inclines towards the liquid discharge notch (27).

4. The negative pressure adjustable jet type oil mist separator filter element according to claim 1, characterized in that, A first guiding groove (25) is further formed in the spoiler plate (22). The first guiding groove (25) is formed downward from the upper surface of the spoiler plate (22).

5. The negative pressure adjustable jet type oil mist separator filter element according to claim 1, wherein One end of the intake pipe (19) is located in the oil mist collection cavity (14) and extends to the collection port (21). The intake pipe (19) faces the filtering cavity (13).

6. The negative pressure adjustable jet type oil mist separator filter element according to claim 1, characterized in that, Both the first filter bag (16) and the second filter bag (17) are in a conical bag-like structure with one open end. A waist-shaped through opening (28) and a second guiding groove (29) are further provided on the surface of the support shell (20) away from the end cover (15). The waist-shaped through opening (28) and the second guiding groove (29) are located between the first filter bag (16) and the second filter bag (17).

7. The negative pressure adjustable jet type oil mist separator filter element according to claim 6, characterized in that, The waist-shaped through opening (28) penetrates through the wall of the support shell (20) and is in communication with the oil mist collection cavity (14). The second guiding groove (29) is formed downward from the upper plane of the support shell (20), and the second guiding groove (29) is in communication with the waist-shaped through opening (28).

8. The negative pressure adjustable jet type oil mist separator filter element according to claim 1, characterized in that, Both the first filter bag (16) and the second filter bag (17) are made of glass fiber. The filtering pore diameter of the first filter bag (16) and the second filter bag (17) is 0.3 - 2μm.

9. The negative pressure adjustable jet type oil mist separator filter element according to claim 1, characterized in that, The outer filter layer (10) is in a cylindrical shell-like structure with one open end. A filter core (11) is provided between the outer filter layer (10) and the inner filter layer (12).

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