Vacuum pump inlet impurity protection device

Abstract

This utility model provides a vacuum pump inlet impurity protection device, belonging to the technical field of vacuum pump protection devices. It includes a housing and a filter screen disposed inside the housing. Multiple side walls of the housing are respectively provided with an inlet, observation window, outlet, and pressure relief port. Side plates are installed on both sides of the housing. The filter screen inside this utility model can efficiently intercept various impurities such as solid particles and dust in the air, effectively preventing various impurities in the pipeline from entering the pump chamber of the vacuum pump. This avoids direct impact and wear of impurities on the precision rotor inside the pump chamber, reduces the possibility of impurities intruding into the core components of the vacuum pump, thereby reducing abnormal wear of key moving parts of the vacuum pump and extending the overall service life of the vacuum pump. Simultaneously, the self-cleaning component of the filter screen not only significantly reduces the frequency and difficulty of manual maintenance but also further improves the continuity and reliability of the device's operation.

Description

Technical Field

[0001] This utility model relates to the technical field of impurity protection devices, and more specifically, to an impurity protection device for the air inlet of a vacuum pump. Background Technology

[0002] Vacuum pumps, as industrial devices specifically designed to extract gaseous media from confined spaces and establish and maintain a vacuum environment through mechanical or physical means, play an irreplaceable and vital role in modern industrial production and precision scientific research experiments. During the continuous operation of a vacuum pump, its key component, the inlet system, needs to efficiently and stably extract gas molecules from the target confined space. This process involves complex gas dynamics principles and precise mechanical structure design. Depending on the specific application requirements, the pumping rate, ultimate vacuum level, and other performance parameters of the vacuum pump must undergo rigorous calculation and testing to ensure that it meets the high standards of vacuum environment required by various industrial production processes and scientific experiments.

[0003] In existing technologies, when a vacuum pump draws in air, it also draws in various impurities from the air, such as dust particles, metal shavings, and fibrous impurities, into the pump chamber. This causes these impurities to penetrate the core components of the vacuum pump, resulting in wear and tear on critical internal parts and ultimately affecting the overall service life of the vacuum pump. How to invent a vacuum pump inlet impurity protection device to solve these problems has become a pressing issue for those skilled in the art. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a vacuum pump inlet impurity protection device, which aims to solve the problem of impurities invading the core components of the vacuum pump, causing wear to the internal key components, and thus affecting the overall service life of the vacuum pump.

[0005] This utility model is implemented as follows: This utility model provides a vacuum pump inlet impurity protection device, including a housing and a filter screen disposed inside the housing. Multiple side walls of the housing are respectively provided with an air inlet, an observation window, an air outlet, and a pressure relief port. Side plates are installed on both sides of the housing, and a fixing frame is installed between the side plates. The filter screen is installed on the fixing frame.

[0006] Preferably, flange rings are installed on the sidewalls of both the air inlet and outlet pipes, the observation window is bolted to the sidewall of the housing, and one end of the pressure relief port is connected to a pressure relief valve.

[0007] Preferably, one end of the filter screen rests on the upper end of one side plate, the other end of the filter screen abuts against the side wall of another side plate, a sealing gasket is installed between the side plate and the housing, and a positioning frame is installed above the filter screen, the positioning frame fixing the filter screen to the fixing frame by bolts.

[0008] Preferably, the inner walls on both sides of the housing are provided with symmetrical inner sliding grooves, and the outer wall on one side of the housing is provided with a corresponding outer sliding groove. Symmetrical ear plates are fixedly connected to the outer wall of the housing near the outer sliding groove, and a motor is installed on the outer wall of one of the ear plates.

[0009] Preferably, a reciprocating lead screw is rotatably connected between the two ear plates, and a slider is threadedly connected to the outer wall of the reciprocating lead screw. A limit block is fixedly connected to one end of the slider, and a first magnetic block is installed on the inner wall of one end of the limit block. The outer wall of the limit block and the inner wall of the outer sliding groove are slidably connected.

[0010] Preferably, a brush plate is installed on the inner wall of the housing, and a limiting rod is fixedly connected to both ends of the brush plate. The outer wall of the limiting rod is slidably connected to the inner wall of the inner groove, and a second magnetic block is installed on the inner wall of one end of the limiting rod and magnetically connected to the first magnetic block.

[0011] Preferably, the lower inner wall of the housing is provided with a feeding groove, the fixing frame is fixedly connected to the inner side wall of the feeding groove, and the filter screen is provided with a through hole on the surface near the guide frame.

[0012] The beneficial effects of this utility model are: The internal filter of the device can efficiently intercept various impurities such as solid particles and dust in the air. These filtered impurities will temporarily remain on the surface of the filter and will not continue to move with the airflow. This can effectively prevent various impurities in the pipeline from entering the pump chamber of the vacuum pump, thereby avoiding direct impact and wear of impurities on the precision rotor inside the pump chamber, reducing the possibility of impurities intruding into the core components inside the vacuum pump, thereby reducing abnormal wear of key moving parts of the vacuum pump, and extending the overall service life of the vacuum pump. At the same time, the self-cleaning component of the filter not only significantly reduces the frequency and difficulty of manual maintenance, but also further improves the continuity and reliability of the device operation. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the vacuum pump inlet impurity protection device provided in this embodiment of the utility model. Figure 2 This utility model provides a vacuum pump inlet impurity protection device. Figure 1Enlarged view of the structure of region A in the middle; Figure 3 This is a half-sectional view of the structure of the vacuum pump inlet impurity protection device provided in this embodiment of the utility model. Figure 4 This utility model provides a vacuum pump inlet impurity protection device. Figure 3 Enlarged view of the structure of region B in the middle; Figure 5 This is a partial structural cross-sectional view of the vacuum pump inlet impurity protection device provided in this embodiment of the utility model. Figure 6 This utility model provides a vacuum pump inlet impurity protection device. Figure 5 Enlarged view of the structure of region C in the middle.

[0015] In the diagram: 1. Housing; 11. Air inlet; 12. Observation window; 13. Air outlet; 14. Pressure relief port; 15. Feed trough; 16. Inner slide groove; 17. Outer slide groove; 18. Ear plate; 19. Motor; 2. Side plate; 21. Sealing gasket; 3. Fixing frame; 31. Guide frame; 4. Filter screen; 41. Positioning frame; 5. Reciprocating lead screw; 6. Slider; 61. Limiting block; 62. First magnetic block; 7. Brush plate; 71. Limiting rod; 72. Second magnetic block. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] Example, refer to Figures 1-6 The vacuum pump inlet impurity protection device includes a housing 1 and a filter screen 4 installed inside the housing 1. Multiple side walls of the housing 1 are respectively provided with an inlet 11, an observation window 12, an outlet 13, and a pressure relief port 14. Side plates 2 are installed on both sides of the housing 1, and a fixing frame 3 is installed between the side plates 2. The filter screen 4 is installed on the fixing frame 3.

[0018] Furthermore, flange rings are installed on the sidewalls of the air inlet 11 and the air outlet 13. The observation window 12 is installed on the sidewall of the housing 1 by bolts. One end of the pressure relief port 14 is connected to the pressure relief valve. One end of the filter screen 4 is placed on the upper end of one side plate 2. The other sidewall of the filter screen 4 abuts against the sidewall of another side plate 2. A sealing gasket 21 is installed between the side plate 2 and the housing 1. A positioning frame 41 is installed above the filter screen 4. The positioning frame 41 fixes the filter screen 4 to the fixing frame 3 by bolts.

[0019] It should be noted that the outlet 13 of this device is reliably connected to the inlet pipe of the vacuum pump via a sealing connector to ensure good airtightness. When the device performs air intake operation through its inlet 11, external air first enters the device under negative pressure, and then is stably delivered to the vacuum pump through the outlet 13. During the airflow transmission process, the filter 4 installed inside the device can efficiently intercept various impurities such as solid particles and dust in the air. These filtered impurities will temporarily remain on the surface of the filter 4 and will not continue to move with the airflow, effectively preventing various impurities in the pipeline from entering the pump chamber of the vacuum pump, thereby avoiding direct impact of impurities on the precision rotor inside the pump chamber. This design reduces the impact and wear, minimizing the possibility of impurities entering the core components of the vacuum pump. This reduces abnormal wear on critical moving parts of the vacuum pump, extending its overall service life. Furthermore, when filter 4 becomes clogged due to excessive impurities accumulated over long-term use, and the airflow at inlet 11 is too high, causing the internal pressure to exceed the safety threshold, the high-sensitivity pressure relief valve connected to pressure relief port 14 will immediately activate, automatically releasing the excessive internal pressure. This dual protection design effectively prevents damage such as structural deformation or sealing failure due to excessive pressure, ensuring safe and stable system operation while further extending the overall service life of the device.

[0020] Furthermore, symmetrical inner grooves 16 are formed on the inner walls of both sides of the housing 1, and a corresponding outer groove 17 is formed on the outer wall of one side of the housing 1. Symmetrical ear plates 18 are fixedly connected to the outer wall of the housing 1 near the outer groove 17. A motor 19 is installed on the outer wall of one of the ear plates 18. A reciprocating screw 5 is rotatably connected between the two ear plates 18. A slider 6 is threadedly connected to the outer wall of the reciprocating screw 5. A limit block 61 is fixedly connected to one end of the slider 6. A first magnetic block 62 is installed on the inner wall of one end of the limit block 61. The outer wall of block 61 is slidably connected to the inner wall of the outer sliding groove 17. A brush plate 7 is installed on the inner wall of the housing 1. Limiting rods 71 ​​are fixedly connected to both ends of the brush plate 7. The outer wall of the limiting rod 71 is slidably connected to the inner wall of the inner sliding groove 16. A second magnetic block 72, which is magnetically connected to the first magnetic block 62, is installed on the inner wall of one end of the limiting rod 71. A feeding groove 15 is opened on the lower inner wall of the housing 1. A guide frame 31 is fixedly connected to the inner side wall of the fixing frame 3 near the feeding groove 15. A through hole is opened on the surface of the filter screen 4 near the guide frame 31.

[0021] It should be noted that the lower inner wall of the feeding trough 15 is sealed with a sealing plug. When too many impurities are intercepted on the surface of the filter screen 4 and cleaning and maintenance are required, the sealing plug is removed and the reciprocating screw 5 is rotated by the motor 19, so that the slider 6 slides smoothly along the inner wall of the outer sliding groove 17. The movement of the slider 6 drives the limiting block 61 to move synchronously. The first magnetic block 62 on the inner wall of the limiting block 61 and the second magnetic block 72 on the limiting rod 71 are linked by magnetic attraction, so that the brush plate 7 performs a reciprocating scraping action on the surface of the filter screen 4, thereby efficiently removing the impurities attached to the filter screen 4 and guiding the impurities to the feeding trough 15 at the lower end of the housing 1. The feeding trough 15 cooperates with the guide frame 31 on the fixing frame 3 to ensure that the cleaned impurities are discharged smoothly along the predetermined path, avoiding secondary accumulation or blockage. Through this automated cleaning method, not only is the frequency and difficulty of manual maintenance significantly reduced, but the continuity and reliability of the device operation are further improved.

[0022] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail here.

[0023] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A vacuum pump suction port impurity protection device, comprising a shell (1) and a filter screen (4) arranged inside the shell (1), characterized in that, The housing (1) has multiple side walls respectively provided with an air inlet (11), an observation window (12), an air outlet (13), and a pressure relief port (14). Side plates (2) are installed on both sides of the housing (1), and a fixing frame (3) is installed between the side plates (2). The filter screen (4) is installed on the fixing frame (3).

2. The vacuum pump suction inlet contamination protection device of claim 1, wherein, Flange rings are installed on the sidewalls of the inlet (11) and outlet (13) pipes. The observation window (12) is bolted to the sidewall of the housing (1). One end of the pressure relief port (14) is connected to a pressure relief valve.

3. A vacuum pump gas inlet contamination protection device according to claim 2, characterised in that, One end of the filter screen (4) rests on the upper end of one side plate (2), and the other end of the filter screen (4) abuts against the side wall of another side plate (2). A sealing gasket (21) is installed between the side plate (2) and the housing (1). A positioning frame (41) is installed above the filter screen (4). The positioning frame (41) fixes the filter screen (4) to the fixing frame (3) by bolts.

4. The vacuum pump suction inlet contamination protection device of claim 1, wherein, The inner walls of both sides of the housing (1) are provided with symmetrical inner sliding grooves (16), and the outer wall of one side of the housing (1) is provided with a corresponding outer sliding groove (17). The outer wall of the housing (1) near the outer sliding groove (17) is fixedly connected with symmetrical ear plates (18), and a motor (19) is installed on the outer wall of one of the ear plates (18).

5. A vacuum pump gas inlet contamination protection device according to claim 4, characterised in that, A reciprocating screw (5) is rotatably connected between the two ear plates (18). A slider (6) is threadedly connected to the outer wall of the reciprocating screw (5). A limit block (61) is fixedly connected to one end of the slider (6). A first magnetic block (62) is installed on the inner wall of one end of the limit block (61). The outer wall of the limit block (61) and the inner wall of the outer slide groove (17) are slidably connected.

6. A vacuum pump gas inlet contamination protection device according to claim 5, characterised in that, The inner wall of the housing (1) is equipped with a brush plate (7), and the two ends of the brush plate (7) are fixedly connected with limit rods (71). The outer wall of the limit rod (71) and the inner wall of the inner slide groove (16) are slidably connected. A second magnetic block (72) is installed on the inner wall of one end of the limit rod (71) and is magnetically connected to the first magnetic block (62).

7. A vacuum pump gas inlet contamination protection device according to claim 6, characterised in that, The lower inner wall of the housing (1) is provided with a feeding groove (15), and the inner side wall of the fixing frame (3) near the feeding groove (15) is fixedly connected with a guide frame (31). The surface of the filter screen (4) near the guide frame (31) is provided with a through hole.

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