Filtering device capable of realizing reliable sealing

Abstract

The utility model relates to a filtering device capable of realizing reliable sealing, which comprises a cylindrical shell and a filter element assembly, an exhaust port is arranged at the center of an upper cover of the cylindrical shell, and air inlets are respectively arranged on two sides of the lower part of the cylindrical shell. According to the technical scheme, the filter element assembly comprises an annular filter element with the bottom sealed, an annular rubber mat arranged on the top face of the annular filter element, a filter element gland arranged on the upper surface of the annular rubber mat and a transition connecting pipe arranged in the center of the filter element gland, a plurality of fixing pieces are arranged between the filter element gland and the annular filter element, and a suspension piece is arranged between the filter element gland and the upper cover; a flange plate is arranged at the upper end of the transition connecting pipe, a concentric groove is formed in the upper surface of the flange plate, a sealing rubber ring is arranged in the concentric groove and makes close contact with the inner top face of the upper cover, the transition connecting pipe is communicated with the exhaust port of the upper cover, and the sealing rubber ring wraps the outer side of the inner end of the exhaust port. The device is good in sealing performance, prevents impurity-containing gas from being directly discharged into follow-up vacuum equipment, ensures the safety of the follow-up vacuum equipment, and remarkably improves the filtering efficiency at the same time.

Description

Technical Field

[0001] The utility model relates to a peripheral component of a vacuum system, in particular to a filtering device capable of realizing reliable sealing, which is suitable for being installed at the front end of the vacuum system. Background Art

[0002] At present, a filter device is usually provided between the vacuum system and the equipment used. The vacuum system is used to suck the gas from the inner cavity of the equipment to keep the inner cavity of the equipment in a vacuum state. The filter device is used to filter the gas drawn from the inner cavity of the equipment to reduce the impurity rate of the gas and avoid damage to the vacuum system, thereby increasing the service life of the vacuum system.

[0003] However, the existing filtering devices have the following problems:

[0004] 1. Due to installation space limitations, small filters are often used. When the internal structure of the filter is poorly sealed, the airflow rushes into the filter and easily causes part of the impurity-containing gas to not enter the filter element, but to be directly discharged from the filter through the leak point, thereby causing damage to the components in the subsequent vacuum system. 2. The surface area of ​​the filter mesh in traditional small filters is small, and the gas filtration efficiency is low. Utility Model Content

[0005] The purpose of the utility model is to provide a filtering device which solves the above-mentioned problems, has a reasonable structure, is reliable in use and can achieve reliable sealing, has good sealing performance, avoids direct discharge of impurity-containing gases into subsequent vacuum equipment, ensures the safety of subsequent vacuum equipment, and at the same time significantly improves the filtering efficiency.

[0006] The technical solution of the utility model is:

[0007] A filtering device capable of achieving reliable sealing comprises a cylindrical shell and a filter element assembly, wherein the cylindrical shell consists of a cylinder, an upper cover and a bottom cover arranged at the upper and lower ends of the cylinder, an exhaust port is arranged in the center of the upper cover, and air inlets are respectively arranged on both sides of the lower part of the cylinder, and the technical key points are: the filter element assembly comprises an annular filter element with a bottom seal, an annular rubber pad arranged on the top surface of the annular filter element, a filter element pressure cover arranged on the upper surface of the annular rubber pad, and a transition pipe arranged in the center of the filter element pressure cover, a plurality of fixing parts are arranged between the filter element pressure cover and the annular filter element, a suspension part is arranged between the filter element pressure cover and the upper cover, a flange is arranged at the upper end of the transition pipe, a concentric groove is arranged on the upper surface of the flange, and a sealing rubber ring is arranged in the concentric groove, the sealing rubber ring is in close contact with the inner top surface of the upper cover, the transition pipe is connected with the exhaust port of the upper cover, and the sealing rubber ring is wrapped around the outer side of the inner end of the exhaust port.

[0008] The above-mentioned filtering device capable of achieving reliable sealing, the number of the suspension parts is multiple, evenly arranged around the transition pipe, the suspension parts include a threaded sleeve fixed to the inner top surface of the upper cover, a first screw connected to the threaded sleeve, and a first nut connected to the first screw, one end of the first screw is connected to the threaded sleeve, and the other end is connected to the first nut after passing through the filter element pressure cover, and the filter element pressure cover is provided with a through hole corresponding to the first screw.

[0009] The above-mentioned filtering device capable of achieving reliable sealing, the fixing member includes a second screw fixed to the top surface of the annular filter element, the upper end of the second screw passes through the upper surface of the annular rubber pad and is connected to the second nut.

[0010] The above-mentioned filtering device capable of achieving reliable sealing has an upper flange and a lower flange on the upper and lower end surfaces of the cylinder respectively, an upper concentric rubber ring is provided between the upper flange and the upper cover, and a lower concentric rubber ring is provided between the lower flange and the bottom cover.

[0011] The beneficial effects of the utility model are:

[0012] 1. After the impure gas enters the cylindrical housing through the two air inlets, it enters the inner side of the filter element assembly after being filtered by the annular filter element, and then reaches the exhaust port through the transition pipe, and then is discharged to the subsequent vacuum equipment from the exhaust port. Since the top surface of the annular filter element is provided with an annular rubber pad, the sealing rubber ring is in close contact with the inner top surface of the upper cover and is wrapped around the outer side of the inner end of the exhaust port, the sealing performance is good, which prevents the impure gas that has not been purified from directly entering the filter element assembly and then being discharged from the exhaust port, ensuring that the impure gas will not mix in the cylindrical housing, and preventing the impure gas from being directly discharged into the subsequent vacuum equipment, thereby ensuring the safety of the subsequent vacuum equipment.

[0013] 2. A suspension is provided between the filter element gland and the upper cover, and the filter element assembly is suspended in the cylindrical housing by the suspension. The outer peripheral surface and the bottom surface of the filter element assembly can be filtered, which significantly increases the surface area of ​​the filtering structure, thereby significantly improving the filtering efficiency and alleviating the filtering pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the filter element assembly and the upper cover of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the annular filter element, annular rubber pad and fixing parts of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the filter element gland of the utility model;

[0018] Figure 5It is a schematic diagram of the inner top surface structure of the upper cover of the utility model.

[0019] In the figure: 1. upper cover, 2. filter element pressure cover, 3. annular filter element, 4. cylinder, 5. sealing rubber ring, 6. first screw, 7. air inlet, 8. bottom cover, 9. lower concentric rubber ring, 10. annular rubber pad, 11. second screw, 12. transition pipe, 13. exhaust port, 14. screw sleeve, 15. upper concentric rubber ring, 16. flange, 17. through hole, 18. concentric groove. DETAILED DESCRIPTION

[0020] The utility model is described in detail below in conjunction with the accompanying drawings.

[0021] like Figure 1-Figure 5 As shown, the filtering device capable of achieving reliable sealing comprises a cylindrical housing and a filter element assembly. The cylindrical housing comprises a cylindrical body 4, an upper cover 1 and a bottom cover 8 arranged at the upper and lower ends of the cylindrical body 4, an exhaust port 13 is arranged at the center of the upper cover 1, and air inlets 7 are arranged on both sides of the lower part of the cylindrical body 4.

[0022] The filter element assembly includes an annular filter element 3 with a bottom seal, an annular rubber pad 10 disposed on the top surface of the annular filter element 3, a filter element gland 2 disposed on the upper surface of the annular rubber pad 10, and a transition pipe 12 disposed at the center of the filter element gland 2. A plurality of fixings are disposed between the filter element gland 1 and the annular filter element 3, and a suspension is disposed between the filter element gland 2 and the upper cover 1.

[0023] In this embodiment, the number of the suspension parts is 4, which are evenly arranged around the transition pipe 12. The suspension parts include a screw sleeve 14 fixed to the inner top surface of the upper cover 1, a first screw 6 connected to the screw sleeve 14, and a first nut connected to the first screw 6. One end of the first screw 6 is connected to the screw sleeve 14, and the other end passes through the filter element gland 2 and is connected to the first nut. The filter element gland 2 is provided with a through hole 17 corresponding to the first screw 6. The number of the fixing parts is 8, and the fixing parts include a second screw 11 fixed to the top surface of the annular filter element 3. The upper end of the second screw 11 passes through the upper surface of the annular rubber pad 10 and is connected to the second nut.

[0024] The upper end of the transition pipe 12 is provided with a flange 16, the upper surface of the flange 16 is provided with a concentric groove 18, and a sealing rubber ring 5 is provided in the concentric groove 18, the sealing rubber ring 5 is in close contact with the inner top surface of the upper cover 1, the transition pipe 12 is connected with the exhaust port 13 of the upper cover 1, and the sealing rubber ring 5 is wrapped around the inner end and outer side of the exhaust port 13. The center line of the exhaust port 13 coincides with that of the transition pipe 12 and the caliber is consistent. The upper and lower end surfaces of the cylinder 4 are respectively provided with an upper flange and a lower flange, an upper concentric rubber ring 15 is provided between the upper flange and the upper cover 1, and a lower concentric rubber ring 9 is provided between the lower flange and the bottom cover 8.

[0025] Working principle:

[0026] The impurity-containing gas enters the cylinder 4 from the two air inlets 7 of the cylinder 4, passes through the filter substrate on the side wall and bottom of the annular filter element 3 and enters the inner cavity of the filter element assembly, and then reaches the exhaust port 13 through the transition pipe 12, and then is discharged to the subsequent vacuum equipment from the exhaust port 13. In this process, since the top surface of the annular filter element 3 is provided with an annular rubber pad 10, the upper surface of the flange 1 of the transition pipe 12 is provided with a sealing rubber ring 5, the sealing rubber ring 5 is in close contact with the inner top surface of the upper cover 1, and is wrapped around the outer side of the inner end of the exhaust port 13, the sealing performance is good, ensuring that the gas must pass through the filter substrate before it can be discharged smoothly, thereby ensuring the cleanliness of the discharged gas.

[0027] The above is a detailed description of the embodiments of the utility model, but the above contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of the invention of the utility model should still fall within the scope of this patent.

Claims

1. A filtering device capable of achieving reliable sealing, comprising a cylindrical housing and a filter element assembly, wherein the cylindrical housing comprises a cylindrical body, an upper cover and a bottom cover arranged at the upper and lower ends of the cylindrical body, an exhaust port is arranged at the center of the upper cover, and air inlets are arranged on both sides of the lower part of the cylindrical body, characterized in that: The filter element assembly includes an annular filter element with a bottom seal, an annular rubber gasket arranged on the top surface of the annular filter element, a filter element pressure cover arranged on the upper surface of the annular rubber gasket, and a transition pipe arranged in the center of the filter element pressure cover. A plurality of fixing parts are arranged between the filter element pressure cover and the annular filter element, a suspension part is arranged between the filter element pressure cover and the upper cover, a flange is arranged at the upper end of the transition pipe, a concentric groove is arranged on the upper surface of the flange and a sealing rubber ring is arranged in the concentric groove, the sealing rubber ring is in close contact with the inner top surface of the upper cover, the transition pipe is connected to the exhaust port of the upper cover, and the sealing rubber ring is wrapped around the outer side of the inner end of the exhaust port.

2. The filtering device capable of achieving reliable sealing according to claim 1, characterized in that: There are multiple suspension parts, which are evenly arranged around the transition pipe. The suspension parts include a screw sleeve fixed to the inner top surface of the upper cover, a first screw connected to the screw sleeve, and a first nut connected to the first screw. One end of the first screw is connected to the screw sleeve, and the other end passes through the filter element pressure cover and is connected to the first nut. The filter element pressure cover is provided with a through hole corresponding to the first screw.

3. The filtering device capable of achieving reliable sealing according to claim 1, characterized in that: The fixing member comprises a second screw rod fixed to the top surface of the annular filter element, and the upper end of the second screw rod passes through the upper surface of the annular rubber pad and is connected to the second nut.

4. The filtering device capable of achieving reliable sealing according to claim 1, characterized in that: An upper flange and a lower flange are respectively arranged on the upper and lower end surfaces of the cylinder body. An upper concentric rubber ring is arranged between the upper flange and the upper cover, and a lower concentric rubber ring is arranged between the lower flange and the bottom cover.

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