Vacuum pump air inlet structure capable of improving air exhaust efficiency

Abstract

The vacuum pump air inlet structure comprises an air inlet pipe opening and a flange, a limiting groove is formed in the inner wall of the air inlet pipe opening, a detachable inner support is clamped in the limiting groove, an inner supporting rod is rotationally arranged in the inner support through a connecting shaft and a bearing, a blade plate is arranged on the outer side of the inner supporting rod, and a cleaning scraping piece is arranged at one end of the blade plate. Due to the fact that the limiting groove in the inner wall of the air inlet pipe opening is provided with the cleaning scraping piece through the inner support, the connecting shaft and the inner supporting rod, when air passes through the air inlet pipe opening, the blade plates can be driven to rotate at a constant speed, and the cleaning scraping piece is arranged on the inner wall of the air inlet pipe opening. The inner wall of the air inlet pipe opening can be subjected to dust scraping and cleaning treatment through the cleaning scraping pieces at one ends of the rotating blade plates, and flow reduction caused by the small cross section area of a pipeline due to long-time accumulation of gas dust on the inner wall of the air inlet pipe opening is prevented, so that the air exhaust efficiency is improved conveniently.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pump accessories technology, specifically a vacuum pump inlet structure for improving pumping efficiency. Background Technology

[0002] A vacuum pump is a device or equipment that uses mechanical, physical, chemical, or physicochemical methods to evacuate a container and create a vacuum. In simpler terms, a vacuum pump is a device that improves, generates, and maintains a vacuum in a closed space using various methods. Based on their working principle, vacuum pumps can be broadly classified into two types: gas trapping pumps and gas transfer pumps. They are widely used in industries such as metallurgy, chemicals, food processing, and electronic coating. The air inlet is a crucial structural component of a vacuum pump.

[0003] The prior art, patent application number 202122191545.3, describes an air inlet structure for a protective vacuum pump. This structure includes a vacuum pump and, through the installation of a fixed plate, a sliding groove, a placement plate, and a sliding sleeve, protects the air inlet assembly. A coil spring drives the protective plate to rotate, ensuring that the air inlet assembly is protected when the vacuum pump is in place. Furthermore, the rotation of the protective plate cleans dust and particles adhering to the air inlet assembly, preventing damage due to prolonged wear and ensuring the normal operation of the vacuum pump. However, the cleaning structure is complex, difficult to manufacture, and the cleaning effect is generally poor. Utility Model Content

[0004] The purpose of this invention is to provide a vacuum pump inlet structure that improves pumping efficiency, thereby solving the problems of complex cleaning structures, inconvenient processing, and mediocre cleaning effects in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a vacuum pump inlet structure for improving pumping efficiency, comprising an inlet pipe and a flange, wherein a limiting groove is provided on the inner wall of the inlet pipe, and a detachable inner bracket is engaged in the limiting groove, wherein an inner support rod is rotatably provided in the middle of the inner support rod via a connecting shaft and a bearing, wherein a blade is provided on the outer side of the inner support rod, wherein a cleaning scraper is provided at one end of the blade, and one end of the cleaning scraper is slidably disposed with respect to the inner wall of the inlet pipe.

[0006] Furthermore, the limiting groove is configured as a rectangular groove, and one end of the limiting groove passes through the connection port of the air inlet pipe.

[0007] Furthermore, the inner support includes positioning plates, and fixed upright plates are fixedly welded to both ends of the two positioning plates.

[0008] Furthermore, the fixed upright plate has positioning holes at both ends, and locking bolts are provided in the internal threads of the positioning holes.

[0009] Furthermore, a roller is provided in the groove on one side of the positioning plate via a rotating shaft, and multiple rollers are provided at equal intervals.

[0010] Furthermore, the cleaning blade is prism-shaped and made of rubber.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention features a cleaning scraper installed in the limiting groove on the inner wall of the air inlet via an inner bracket, connecting shaft, and inner support rod. When gas passes through the air inlet, the scraper drives the blade to rotate at a uniform speed. The cleaning scraper at one end of the rotating blade cleans the inner wall of the air inlet, preventing dust from accumulating on the inner wall and reducing the cross-sectional area of ​​the pipe, thus improving air extraction efficiency. Furthermore, the cleaning mechanism is concealed within the pipe, avoiding any impact on the external structure. The design is simple, easy to manufacture, and provides good cleaning results.

[0013] This utility model features a detachable inner bracket that is snapped into a limiting groove. The inner bracket includes a positioning plate, and two positioning plates are fixedly welded to both ends. A roller is provided in a groove on one side of the positioning plate via a rotating shaft, which makes it easy to pull the inner bracket out of the limiting groove, thereby facilitating the disassembly and assembly of the blade and cleaning scraper.

[0014] Furthermore, the present invention has positioning holes at both ends of the fixed upright plate, and locking bolts are provided in the internal threads of the positioning holes for locking the two ends of the inner bracket inserted into the limiting groove, which facilitates the improvement of the stability of the inner bracket installed in the air inlet. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the blade and inner support structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal support structure of this utility model.

[0019] In the diagram: 1. Air inlet; 2. Flange; 3. Fixed plate; 4. Connecting shaft; 5. Inner support rod; 6. Blade; 7. Cleaning scraper; 8. Limiting groove; 9. Positioning plate; 10. Locking bolt; 11. Bearing; 12. Positioning hole; 13. Groove; 14. Roller; 15. Rotating shaft. 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. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1 , Figure 2 , Figure 3 In this embodiment of the invention, a vacuum pump inlet structure for improving pumping efficiency includes an inlet pipe 1 and a flange 2. The inner wall of the inlet pipe 1 is provided with a limiting groove 8, and a detachable inner support is engaged within the limiting groove 8. An inner support rod 5 is rotatably mounted in the middle of the inner support via a connecting shaft 4 and a bearing 11. An impeller 6 is provided on the outer side of the inner support rod 5. A cleaning scraper 7 is provided at one end of the impeller 6. The cleaning scraper 7 is prismatic in shape and made of rubber. One end of the cleaning scraper 7 slides against the inner wall of the inlet pipe 1. When gas passes through the inlet pipe 1, it drives the impeller 6 to rotate at a uniform speed. The cleaning scraper 7 at one end of the rotating impeller 6 can scrape and clean the inner wall of the inlet pipe 1, preventing dust from accumulating on the inner wall of the inlet pipe 1 for a long time, thus reducing the cross-sectional area of ​​the pipe and causing a decrease in flow rate (according to the formula: velocity (v) = flow rate (Q) / ...). The cross-sectional area of ​​the pipe (A), under the condition of inconvenient flow velocity (v), is used to facilitate the improvement of the efficiency of air extraction.

[0022] like Figure 1 and Figure 3 As shown, in order to facilitate the disassembly and assembly of the blade 6 and the cleaning scraper 7, the limiting groove 8 is also set as a rectangular groove, and one end of the limiting groove 8 passes through the connection port of the air intake 1. The inner bracket includes a positioning plate 9, and the two positioning plates 9 are fixedly welded to the two ends of the fixing plate 3. The groove 13 on one side of the positioning plate 9 is provided with a roller 14 through the rotating shaft 15, and multiple rollers 14 are provided at equal intervals, so that the inner bracket can be easily pulled out of the limiting groove 8, thereby facilitating the disassembly and assembly of the blade 6 and the cleaning scraper 7.

[0023] like Figure 2 and Figure 3 As shown, in order to improve the stability of the inner bracket installation, positioning holes 12 are provided at both ends of the fixed plate 3, and locking bolts 10 are provided in the internal threads of the positioning holes 12 to lock the two ends of the inner bracket inserted into the limiting groove 8, so as to improve the stability of the inner bracket installed in the air inlet 1.

[0024] The working principle and usage process of this utility model are as follows: During use, the limiting groove 8 on the inner wall of the air inlet 1 is equipped with a blade 6 and a cleaning scraper 7 through the inner bracket, connecting shaft 4 and inner support rod 5. When the gas passes through the air inlet 1, it can drive the blade 6 to rotate at a uniform speed. The cleaning scraper 7 at one end of the rotating blade 6 can be used to scrape and clean the inner wall of the air inlet 1, preventing the dust in the gas from accumulating on the inner wall of the air inlet 1 for a long time, which would cause the cross-sectional area of ​​the pipe to be small and the flow rate to decrease, thereby improving the efficiency of air extraction.

[0025] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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 inlet structure for improving pumping efficiency, comprising an inlet pipe (1), characterized in that: The inner wall of the air inlet (1) is provided with a limiting groove (8), and a detachable inner bracket is snapped into the limiting groove (8). The inner bracket is provided with an inner support rod (5) through a connecting shaft (4) and a bearing (11) in the middle. The inner support rod (5) is provided with a blade (6) on the outside. One end of the blade (6) is provided with a cleaning scraper (7), and one end of the cleaning scraper (7) is slidably disposed with the inner wall of the air inlet (1).

2. The vacuum pump inlet structure for improving pumping efficiency according to claim 1, characterized in that: The limiting groove (8) is set as a rectangular groove, and one end of the limiting groove (8) passes through the connection port of the air inlet (1).

3. The vacuum pump inlet structure for improving pumping efficiency according to claim 1, characterized in that: The inner support includes positioning plates (9), and fixed upright plates (3) are fixedly welded to both ends of the two positioning plates (9).

4. The vacuum pump inlet structure for improving pumping efficiency according to claim 3, characterized in that: The fixed plate (3) has positioning holes (12) at both ends, and the positioning holes (12) are threaded with locking bolts (10).

5. The vacuum pump inlet structure for improving pumping efficiency according to claim 3, characterized in that: The positioning plate (9) has a groove (13) on one side with a roller (14) provided by a rotating shaft (15), and multiple rollers (14) are provided at equal intervals.

6. The vacuum pump inlet structure for improving pumping efficiency according to claim 1, characterized in that: The cleaning scraper (7) is prism-shaped and has a rubber structure.

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