Oil seal type vacuum pump convenient for dust removal and filtration

Abstract

The utility model relates to the technical field of vacuum pumps, in particular to an oil seal type vacuum pump convenient for dust removal and filtration, which comprises an oil seal type vacuum pump body and an air inlet, the top of the mounting sleeve is connected with a rectangular dustproof sleeve through an adjusting clamping structure, sliding grooves distributed in a circumferential array mode are formed in the top of the inner wall of the rectangular dustproof sleeve, filter screens are slidably connected into the sliding grooves, a ventilation opening is formed in the top of the rectangular dustproof sleeve in a protruding mode, and the top of the rectangular dustproof sleeve is in threaded connection with a dustproof cover. According to the utility model, a three-layer progressive filtering system is formed through the filter screen cylinder arranged at the air inlet, the plurality of filter screens in the rectangular dustproof sleeve and the dustproof net at the air vent, so that impurity particles with different particle sizes can be intercepted in a grading manner, and the vacuum pump can still keep stable and efficient air exhaust performance in a high-dust-concentration environment.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pump technology, and in particular to an oil-sealed vacuum pump that is easy to clean and filter. Background Technology

[0002] Oil-sealed vacuum pumps, as crucial equipment for achieving vacuum, are widely used in various fields such as chemical and pharmaceutical manufacturing, electronics manufacturing, vacuum coating, and food packaging due to their compact structure, high pumping efficiency, and strong operational stability. During actual operation, the vacuum pump's inlet is directly connected to the external environment, allowing dust, particles, and other impurities in the air to enter the pump body along with the gas. These solid impurities not only accelerate the wear of moving parts such as the rotor, stator, and blades, reducing the precision of mechanical component fit, but can also lead to oil circuit blockage and lubricant contamination, thereby affecting the vacuum pump's pumping performance and service life, increasing equipment maintenance costs and downtime for repairs.

[0003] Currently, most oil-sealed vacuum pumps on the market employ single-layer filters or simple filtration devices for dust prevention. These types of filters often suffer from low filtration accuracy and small dust holding capacity, making it difficult to effectively intercept impurities of different sizes. When faced with working environments with high dust concentrations, single-layer filters are prone to clogging, leading to increased air intake resistance and a significant decrease in the pumping efficiency of the vacuum pump. Utility Model Content

[0004] The purpose of this invention is to address the problems of low filtration accuracy and small dust holding capacity that often exist with existing single-layer filters or simple filtration devices. These devices are difficult to effectively intercept impurities of different sizes, and when faced with working environments with high dust concentrations, single-layer filters are prone to clogging, leading to increased air intake resistance and a significant decrease in the pumping efficiency of the vacuum pump. Therefore, this invention proposes an oil-sealed vacuum pump that facilitates dust removal and filtration.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An oil-sealed vacuum pump for easy dust removal and filtration includes an oil-sealed vacuum pump body and an air inlet. The air inlet is fixedly connected to an installation sleeve via a flange. A filter screen is slidably connected inside the installation sleeve. A rectangular dust cover is connected to the top of the installation sleeve via an adjustable snap-fit ​​structure. The top of the inner wall of the rectangular dust cover has grooves arranged in a circumferential array. A filter screen is slidably connected within the grooves. An air vent is protruding from the top of the rectangular dust cover. A dust cover is threadedly connected to the top of the rectangular dust cover.

[0007] Preferably, the bottom of the mounting sleeve is provided with an annular groove, and a sealing gasket is fitted inside the annular groove.

[0008] Preferably, a rectangular flange adapted to the rectangular dust cover is fixedly connected to the top of the mounting sleeve, and the top of the rectangular flange is provided with a mounting hole.

[0009] Preferably, the adjusting snap-fit ​​structure includes a connecting column fixedly connected to the rectangular dust cover, a limiting groove distributed in an axial array on the outer wall of the connecting column, a locking plate slidably connected in the limiting groove, a telescopic rod fixedly connected to one end of the locking plate, and a locking bolt threadedly connected to the outer wall of the telescopic rod.

[0010] Preferably, a flow guide is fixedly connected to the inner wall of the rectangular dust cover, and the flow guide is disposed above the inlet end of the filter cylinder.

[0011] Preferably, a dustproof net is fixedly installed on the inner wall of the vent by bolts.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. In use, this utility model forms a three-layer progressive filtration system through the filter cylinder at the air inlet, multiple filter screens inside the rectangular dust cover, and the dustproof net at the air vent. This system can effectively intercept impurities of different sizes. From larger particles to fine dust, it can effectively filter them, significantly improving filtration accuracy and dust holding capacity, reducing the risk of impurities entering the pump body, and ensuring that the vacuum pump maintains stable and efficient pumping performance even in high dust concentration environments.

[0014] 2. In use, this utility model allows for a stable and easy-to-disassemble connection between the rectangular dust cover and the mounting sleeve by adjusting the interlocking structure, including the connecting column, limiting groove, clamping plate, telescopic rod, and locking bolt. When cleaning or replacing the filter screen is required, simply loosen the locking bolt to easily remove the rectangular dust cover and access the internal filter screen. No complicated tools or cumbersome procedures are needed, significantly reducing manual maintenance costs and shortening equipment downtime. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of an oil-sealed vacuum pump that facilitates dust removal and filtration, as proposed in this utility model.

[0016] Figure 2 This is a cross-sectional view of an oil-sealed vacuum pump that facilitates dust removal and filtration, as proposed in this utility model.

[0017] Figure 3 A three-dimensional structural diagram of the mounting sleeve and filter screen of an oil-sealed vacuum pump that facilitates dust removal and filtration, as proposed in this utility model.

[0018] Figure 4This is a three-dimensional structural diagram of a rectangular dust cover and filter screen for an oil-sealed vacuum pump that facilitates dust removal and filtration, as proposed in this utility model.

[0019] In the diagram: 1. Oil-sealed vacuum pump body; 2. Air inlet; 3. Mounting sleeve; 4. Filter screen cylinder; 5. Rectangular dust cover; 6. Slide groove; 7. Filter screen; 8. Vent; 9. Dust cover; 10. Annular groove; 11. Sealing gasket; 12. Mounting hole; 13. Connecting column; 14. Limiting groove; 15. Telescopic rod; 16. Locking bolt; 17. Clamping plate; 18. Flow guide; 19. Dust screen. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] Reference Figures 1-4 An oil-sealed vacuum pump for easy dust removal and filtration includes an oil-sealed vacuum pump body 1 and an air inlet 2. The air inlet 2 is integrally formed with the oil-sealed vacuum pump body 1. An installation sleeve 3 is fixedly connected to the air inlet 2 through a flange. A filter screen 4 is slidably connected inside the installation sleeve 3. The shape of the filter screen 4 is adapted to the inner wall of the installation sleeve 3, which not only ensures the convenience of installing and disassembling the filter screen 4, but also reduces turbulence and lowers the air intake resistance during gas flow.

[0022] The filter cylinder 4 is the third layer of filtration structure, which can effectively intercept dust particles with extremely small diameters. As the last line of filtration, it ensures that the gas entering the vacuum pump body meets the cleanliness standard.

[0023] The top of the mounting sleeve 3 is connected to a rectangular dust cover 5 via an adjustable snap-fit ​​structure. A rectangular flange that matches the rectangular dust cover 5 is fixedly connected to the top of the mounting sleeve 3. The top of the rectangular flange has a mounting hole 12. The adjustable snap-fit ​​structure includes a connecting post 13 fixedly connected to the rectangular dust cover 5. A limiting groove 14 distributed in an axial array is provided on the outer wall of the connecting post 13. A retaining plate 17 is slidably connected in the limiting groove 14. A telescopic rod 15 is fixedly connected to one end of the retaining plate 17. A locking bolt 16 is threadedly connected to the outer wall of the telescopic rod 15.

[0024] The limiting groove 14 provides multiple adjustable installation positions for the clamping plate 17. When the rectangular dust cover 5 needs to be installed, the connecting post 13 is inserted into the top of the mounting sleeve 3 through the mounting hole 12. Then, according to the distance between the connecting posts 13, the locking bolt 16 is loosened, the length of the telescopic rod 15 is adjusted, and the clamping plate 17 is inserted into the appropriate limiting groove 14. The top of the clamping plate 17 abuts against the bottom of the rectangular flange, thereby ensuring a stable connection between the rectangular dust cover 5 and the mounting sleeve 3.

[0025] A rubber sealing gasket is provided at the connection between the mounting sleeve 3 and the rectangular dust cover 5. The elasticity of the rubber sealing gasket allows the clamping plate 17 to be tightly clamped in the middle by the limiting groove 14 and the rectangular flange, preventing it from falling off easily.

[0026] The top of the inner wall of the rectangular dust cover 5 is provided with grooves 6 arranged in a circular array. A filter screen 7 is slidably connected in the grooves 6. The rectangular dust cover 5 serves as the main body of the second filter barrier. The grooves 6 arranged in a circular array on the top of the inner wall form a precise sliding fit with the frame of the filter screen 7. This design not only facilitates the installation and positioning of the filter screen 7, but also ensures that the filter screen 7 is stable and does not shift under gas pressure.

[0027] The filter screen 7 uses a multi-layer composite filter material. The outer layer is a coarse filter screen, which is used to intercept larger particulate impurities, and the inner layer is a high-precision fine filter screen, which can capture fine dust.

[0028] The top of the rectangular dust cover 5 has a raised vent 8. The inner wall of the vent 8 is fixed with a dust screen 19 by bolts. The vent 8 is located on the raised part at the top of the rectangular dust cover 5. This design can utilize the inertia of gas flow to make some particles of the gas carrying impurities settle due to gravity and airflow deflection before entering the vent 8, thereby reducing the filtration pressure of the dust screen 19. The top of the rectangular dust cover 5 is threaded with a dust cover 9.

[0029] Dust filter 19 is the first layer of filtration, which initially filters out most visible particles, reducing the workload of subsequent filtration components and extending the service life of the entire filtration system.

[0030] The bottom of the mounting sleeve 3 is provided with an annular groove 10, and a sealing gasket 11 is fitted inside the annular groove 10. Under the dual action of the annular groove 10 and the flange pressure, the sealing gasket 11 can tightly fit the surface of the mounting sleeve 3 and the connecting parts. Even under long-term vibration and negative pressure environment, it can still maintain excellent sealing performance, prevent gas leakage, and ensure the pumping efficiency and vacuum degree of the vacuum pump.

[0031] A flow guide 18 is fixedly connected to the inner wall of the rectangular dust cover 5. The flow guide 18 is funnel-shaped and is positioned above the inlet end of the filter cylinder 4, allowing the incoming airflow to pass precisely through the filter cylinder 4 and preventing airflow leakage from gaps.

[0032] Working principle:

[0033] When using this oil-sealed vacuum pump, first, fix the mounting sleeve 3 to the air inlet 2 via the flange, ensuring that the sealing gasket 11 is pressed tightly within the annular groove 10 to form a reliable seal. Then, slide the filter screen cylinder 4 into the mounting sleeve 3, ensuring it fits tightly against the inner wall, serving as the third layer of filtration to intercept fine dust. Next, install the rectangular dust cover 5 by adjusting the snap-fit ​​structure: insert the connecting post 13 into the mounting hole 12, adjust the length of the telescopic rod 15 so that the clamping plate 17 engages with the limiting groove 14, and tighten the locking bolt 16, utilizing the elasticity of the rubber sealing gasket for a secure clamping effect. Finally, push the multi-layer composite filter screen 7 along the sliding groove 6 into the rectangular dust cover 5, and tighten the top dust cover 9 to complete the assembly of the entire filtration system.

[0034] After the vacuum pump is started, the gas passes through the dust filter 19 (first layer of filtration) to initially intercept large particles of impurities, and then through the filter 7 (second layer of filtration) inside the rectangular dust cover 5 to further remove medium-sized dust particles. The airflow guide shroud 18 directs the airflow to the filter cylinder 4 (third layer of filtration), ensuring that the gas passes fully through the high-precision filter cylinder and thoroughly removes extremely small particles. The clean gas finally enters the pump body through the air inlet 2, while the multi-layer sealing structure and dustproof design effectively prevent leakage and secondary pollution, significantly extending the pump body's lifespan and maintaining high-efficiency pumping performance. After shutdown, each filter component can be quickly disassembled for cleaning or replacement, making maintenance convenient.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An oil-sealed vacuum pump for easy dust removal and filtration, comprising an oil-sealed vacuum pump body (1) and an air inlet (2), characterized in that, The air inlet (2) is fixedly connected to the mounting sleeve (3) via a flange. The mounting sleeve (3) is slidably connected to the inside of the filter screen cylinder (4). The top of the mounting sleeve (3) is connected to a rectangular dust cover (5) via an adjustable snap-fit ​​structure. The top of the inner wall of the rectangular dust cover (5) is provided with a circumferentially arrayed groove (6). The groove (6) is slidably connected to the filter screen (7). The top of the rectangular dust cover (5) is raised and provided with an air vent (8). The top of the rectangular dust cover (5) is threadedly connected to a dust cover (9).

2. The oil-sealed vacuum pump for easy dust removal and filtration according to claim 1, characterized in that, The bottom of the mounting sleeve (3) is provided with an annular groove (10), and a sealing gasket (11) is fitted inside the annular groove (10).

3. The oil-sealed vacuum pump for easy dust removal and filtration according to claim 1, characterized in that, The top of the mounting sleeve (3) is fixedly connected to a rectangular flange that is compatible with the rectangular dust cover (5), and the top of the rectangular flange is provided with a mounting hole (12).

4. The oil-sealed vacuum pump for easy dust removal and filtration according to claim 3, characterized in that, The adjustable snap-fit ​​structure includes a connecting post (13) fixedly connected to a rectangular dust cover (5). The outer wall of the connecting post (13) is provided with a limiting groove (14) distributed in an axial array. A locking plate (17) is slidably connected in the limiting groove (14). One end of the locking plate (17) is fixedly connected to a telescopic rod (15). A locking bolt (16) is threadedly connected to the outer wall of the telescopic rod (15).

5. The oil-sealed vacuum pump for easy dust removal and filtration according to claim 1, characterized in that, The inner wall of the rectangular dust cover (5) is fixedly connected to a flow guide (18), which is located above the inlet end of the filter cylinder (4).

6. The oil-sealed vacuum pump for easy dust removal and filtration according to claim 1, characterized in that, The inner wall of the vent (8) is fixed with a dustproof net (19) by bolts.

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