Filter for high-vacuum high-capacity pumps

Abstract

This utility model relates to the field of filtration equipment technology, specifically a filter for a high-vacuum, large-capacity pump. It includes a filter housing with an inlet and an outlet port connected internally. A filter frame is slidably connected inside the filter housing. The surface of the filter frame has uniformly distributed filter holes. A coarse filter layer made of stainless steel woven mesh is provided on the inner wall of the filter frame. A medium filter layer is also provided on the inner wall of the filter frame. This utility model achieves high-precision filtration through a multi-layered filtration structure, precisely meeting the stringent requirements of high-vacuum, large-capacity pumps for impurity interception. It significantly reduces the probability of impurities entering the pump body, thereby reducing the risk of wear, blockage, and contamination of precision components within the pump. This significantly improves the pumping efficiency and vacuum stability of the vacuum pump, extending the equipment's service life.

Description

Technical Field

[0001] This utility model relates to the field of filtration equipment technology, and in particular to a filter for a high-vacuum, large-capacity pump. Background Technology

[0002] During the operation of a high-vacuum, high-capacity pump, gas needs to enter the pump body to complete the vacuuming operation. However, the gas often contains impurities. If these impurities directly enter the pump body, they will cause wear on the precision components inside the pump. Therefore, filters are usually installed on high-vacuum, high-capacity pumps to filter impurities.

[0003] The above-mentioned and existing technologies have the following drawbacks: Most existing filters for vacuum pumps adopt a single-layer filtration structure, which has low filtration accuracy and is difficult to effectively intercept small particulate impurities. This not only affects the pumping efficiency and vacuum stability of the vacuum pump, but may also cause wear, blockage or contamination of internal components of the pump body, shortening the service life of the equipment.

[0004] Therefore, a filter for high-vacuum, high-capacity pumps is proposed. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing filters for vacuum pumps, which mostly employ a single-layer filtration structure, have low filtration accuracy, and are difficult to effectively intercept small particulate impurities. Therefore, this invention proposes a filter for high-vacuum, large-capacity pumps.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a filter for a high-vacuum, large-capacity pump, comprising a filter housing, an air inlet port connected to the interior of the filter housing, an air outlet port connected to the interior of the filter housing, a filter frame slidably connected inside the filter housing, filter holes evenly distributed on the surface of the filter frame, a coarse filter layer made of stainless steel woven mesh on the inner wall of the filter frame, a medium filter layer made of glass fiber filter paper on the inner wall of the filter frame, a fine filter layer made of polytetrafluoroethylene microporous membrane on the inner wall of the filter frame, and a cover fixedly installed on the filter housing by bolts.

[0007] The effects achieved by the above components are as follows: the coarse filter layer is used to intercept large particulate impurities, the medium filter layer is used to intercept medium particulate impurities, and the fine filter layer is used to intercept tiny particulate impurities. By setting up a multi-layer filtration structure, high-precision filtration is achieved, which is precisely adapted to the stringent requirements of high vacuum and large-capacity pumps for impurity interception. This significantly reduces the probability of impurities entering the pump body, thereby reducing the risk of wear, blockage, and contamination of precision components inside the pump, significantly improving the pumping efficiency and vacuum stability of the vacuum pump, and extending the service life of the equipment.

[0008] Preferably, the edges of the coarse filter layer, the medium filter layer, and the fine filter layer are all sealed to the inner wall of the filter housing with sealant.

[0009] The effect achieved by the above components is that the edges of the coarse filter layer, the medium filter layer and the fine filter layer are all sealed to the inner wall of the filter housing with sealant, which can ensure that the gas is completely filtered.

[0010] Preferably, fluororubber sealing rings are provided between the air inlet and the filter housing, and between the air outlet and the filter housing.

[0011] The effect achieved by the above components is that the fluororubber sealing ring can ensure sealing performance and prevent vacuum leakage.

[0012] Preferably, the air intake port is equipped with a one-way valve.

[0013] The effect achieved by the above components is that the one-way valve can prevent gas backflow.

[0014] Preferably, a handle is fixedly installed on the surface of the filter frame, and an auxiliary pad is fixedly installed on the surface of the handle.

[0015] The aforementioned components achieve the following effects: the handle allows workers to easily remove the filter holder; after the cover is fixed to the filter housing, the cover can be pressed against the filter holder with the aid of the auxiliary pad and the handle, preventing the filter holder from shaking within the filter housing.

[0016] Preferably, a limiting groove is formed on the surface of the filter frame, and a rectangular plate is slidably connected to the inner wall of the limiting groove. The surface of the rectangular plate is fixedly connected to the filter housing.

[0017] The effect achieved by the above components is that after the rectangular plate is inserted into the limiting groove, it is convenient for the staff to place the filter frame inside the filter housing.

[0018] Preferably, the surface of the handle is provided with anti-slip protrusions.

[0019] The effect achieved by the above components is that the anti-slip protrusions make it easier for workers to grip the handle.

[0020] Compared with the prior art, the advantages and positive effects of this utility model are as follows: In this invention, a multi-layer filtration structure is used to achieve high-precision filtration, which is precisely adapted to the stringent requirements of high-vacuum, large-capacity pumps for impurity interception. This significantly reduces the probability of impurities entering the pump body, thereby reducing the risk of wear, blockage, and contamination of precision components inside the pump. It also significantly improves the pumping efficiency and vacuum stability of the vacuum pump and extends the service life of the equipment. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 2 This utility model Figure 1 A partial disassembly diagram; Figure 3 This utility model Figure 2 Enlarged view of point A; Figure 4 This utility model Figure 1 A schematic diagram of the cross-sectional structure; Figure 5 This utility model Figure 4 Enlarged view of point B; Legend: 1. Filter housing; 2. Air inlet; 3. Air outlet; 4. Fluororubber sealing ring; 5. One-way valve; 6. Cover; 7. Filter frame; 8. Handle; 9. Auxiliary pad; 10. Coarse filter layer; 11. Medium filter layer; 12. Fine filter layer; 13. Rectangular plate; 14. Limiting groove; 15. Filter holes. Detailed Implementation

[0023] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0025] like Figure 1-5As shown, this utility model provides a filter for a high-vacuum, large-capacity pump, including a filter housing 1. An air inlet 2 and an air outlet 3 are connected internally to the filter housing 1. A filter frame 7 is slidably connected inside the filter housing 1. Filter holes 15 are evenly distributed on the surface of the filter frame 7. A coarse filter layer 10, made of stainless steel woven mesh, is provided on the inner wall of the filter frame 7. A medium filter layer 11, made of glass fiber filter paper, is also provided on the inner wall of the filter frame 7. A fine filter layer 12, made of polytetrafluoroethylene microporous membrane, is provided on the inner wall of the filter housing 1. A cover 6 is fixedly installed on the filter housing 1 with bolts. The coarse filter layer 10 is used to intercept large particulate impurities, the medium filter layer 11 is used to intercept medium-sized particulate impurities, and the fine filter layer 12 is used to intercept small particulate impurities. The edges of the coarse filter layer 10, the medium filter layer 11, and the fine filter layer 12 are all sealed to the inner wall of the filter housing 1 with sealant. The wall-sealed connection ensures complete filtration of the gas. Fluororubber sealing rings 4 are provided between the air inlet 2 and the filter housing 1, and between the air outlet 3 and the filter housing 1. The fluororubber sealing rings 4 ensure sealing performance and prevent vacuum leakage. A one-way valve 5 is provided inside the air inlet 2 to prevent gas backflow. A handle 8 is fixedly installed on the surface of the filter frame 7, and an auxiliary pad 9 is fixedly installed on the surface of the handle 8. The handle 8 allows the operator to easily remove the filter frame 7. After the cover 6 is fixed on the filter housing 1, the cover 6 can press the filter frame 7 with the help of the auxiliary pad 9 and the handle 8, so that the filter frame 7 cannot shake in the filter housing 1. A limiting groove 14 is opened on the surface of the filter frame 7. A rectangular plate 13 is slidably connected to the inner wall of the limiting groove 14. The surface of the rectangular plate 13 is fixedly connected to the filter housing 1. After the rectangular plate 13 is inserted into the limiting groove 14, the operator can easily place the filter frame 7 into the filter housing 1. The surface of the handle 8 is provided with anti-slip protrusions to make it easy for the operator to grip the handle 8.

[0026] The overall working principle is as follows: When using the filter, the gas to be filtered first enters the filter through the inlet port 2, which is connected to the inside of the filter housing 1. The one-way valve 5 installed in the inlet port 2 remains open when the gas enters, while strictly limiting the reverse flow of the gas to prevent the filtered gas or the gas inside the vacuum pump from flowing back to the inlet end. This ensures that the gas always moves along a one-way path of inlet → filtration → outlet. The gas entering the housing will first come into contact with the coarse filter layer 10 on the inner wall of the filter frame 7. The coarse filter layer 10 is made of stainless steel woven mesh, which can quickly intercept larger impurities in the gas. The gas that has passed through the coarse filter continues to permeate to the middle filter layer 11. The glass fiber filter paper of the middle filter layer 11 can further capture medium-sized impurities, reducing the risk of fine impurities clogging the subsequent fine filter layer 12. Finally, the gas passes through the fine filter layer 12. The polytetrafluoroethylene microporous membrane of the fine filter layer 12, with its fine microporous structure, accurately intercepts small particulate impurities, achieving high-precision filtration. In addition to filtration, the edges of the coarse filter layer 10, the medium filter layer 11, and the fine filter layer 12 are all sealed to the inner wall of the filter housing 1 with sealant. This prevents unfiltered gas from flowing directly through the gap between the filter layer and the housing, ensuring that every wisp of gas undergoes a complete three-layer filtration process. Throughout the gas filtration process, the fluororubber sealing rings 4 between the inlet port 2 and the filter housing 1, and between the outlet port 3 and the filter housing 1, will tightly fit the contact surfaces of the components, effectively blocking the gap between the housing and the end cap, preventing gas leakage in a high vacuum environment, ensuring the stability of the vacuum pump's vacuum level, and avoiding a decrease in pumping efficiency due to leakage. The clean gas that has passed through the three layers of filtration finally enters the high vacuum, large-capacity pump body through the outlet port 3, which is connected to the inside of the filter housing 1. This provides a clean gas environment for the vacuum pump's pumping operation, reducing the wear, blockage, and contamination of precision components inside the pump by impurities, thereby ensuring the pumping efficiency and vacuum stability of the vacuum pump and extending the service life of the equipment.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A filter for a high-vacuum, high-capacity pump, comprising a filter housing (1), characterized in that: The filter housing (1) has an air inlet (2) and an air outlet (3) connected to its interior. A filter frame (7) is slidably connected inside the filter housing (1). Filter holes (15) are evenly opened on the surface of the filter frame (7). A coarse filter layer (10) is provided on the inner wall of the filter frame (7). The coarse filter layer (10) is made of stainless steel woven mesh. A medium filter layer (11) is provided on the inner wall of the filter frame (7). The medium filter layer (11) is made of glass fiber filter paper. A fine filter layer (12) is provided on the inner wall of the filter frame (7). The fine filter layer (12) is made of polytetrafluoroethylene microporous membrane. A cover (6) is fixedly installed on the filter housing (1) by bolts.

2. The filter for a high-vacuum, large-capacity pump according to claim 1, characterized in that: The edges of the coarse filter layer (10), the medium filter layer (11) and the fine filter layer (12) are all sealed to the inner wall of the filter housing (1) with sealant.

3. The filter for a high-vacuum, large-capacity pump according to claim 1, characterized in that: Fluororubber sealing rings (4) are provided between the air inlet (2) and the filter housing (1), and between the air outlet (3) and the filter housing (1).

4. A filter for a high-vacuum, large-capacity pump according to claim 1, characterized in that: The air intake port (2) is equipped with a one-way valve (5).

5. A filter for a high-vacuum, large-capacity pump according to claim 1, characterized in that: A handle (8) is fixedly installed on the surface of the filter frame (7), and an auxiliary pad (9) is fixedly installed on the surface of the handle (8).

6. A filter for a high-vacuum, large-capacity pump according to claim 1, characterized in that: The filter frame (7) has a limiting groove (14) on its surface. A rectangular plate (13) is slidably connected to the inner wall of the limiting groove (14). The surface of the rectangular plate (13) is fixedly connected to the filter housing (1).

7. A filter for a high-vacuum, large-capacity pump according to claim 5, characterized in that: The surface of the handle (8) is provided with anti-slip protrusions.

Images