Vacuum pump cavity control device

Abstract

A vacuum pump cavity control device relates to the technical field of vacuum pump spare and accessory parts and comprises a fixing frame and a supporting device, the fixing frame is arranged below a cavity in a pump body, the supporting device is arranged on the fixing frame, the supporting device is composed of a second fixing block, a fixing wheel and a limiting device, and the fixing wheel and the limiting device are arranged on the second fixing block. The limiting device is composed of a third fixing block and a limiting plate, the third fixing block is connected with the second fixing block, the limiting plate is arranged on the third fixing block, the supporting device on the fixing frame plays a role in adjusting the size of an inner cavity of the cavity, and the radian of the supporting device corresponds to that of the impeller; the water ring vacuum pump is reasonable and practical in structure and easy to operate, the size of an inner cavity of the pump body is convenient to adjust, maintenance is convenient, and the application range of the water ring vacuum pump is greatly met while the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vacuum pump spare parts, in particular to a cavity control device for a vacuum pump. BACKGROUND

[0002] It is known that a water ring vacuum pump is a rough vacuum pump and belongs to a low-pressure compressor, and its pressure range is 1-2*105 Pa gauge pressure, and an appropriate amount of water is arranged in the pump body as a working liquid, when the impeller rotates in a clockwise direction, the upper inner surface of the water ring is in contact with the top end of the blade (in fact, the blade has a certain insertion depth in the water ring), at this time, a crescent-shaped space is formed between the impeller hub and the water ring, and the space is divided into a plurality of small cavities equal to the number of blades, if 0° at the lower part of the impeller is taken as the starting point, the volume of the small cavity changes from small to large when the impeller rotates for 180°, and the small cavity is communicated with the gas suction port at this time, at this time, the gas is sucked in, and when the gas suction is completed, the small cavity is isolated from the gas suction port; when the impeller continues to rotate, the small cavity changes from large to small, so that the gas is compressed; when the small cavity is communicated with the exhaust port, the gas is discharged outside the pump, but as a water ring vacuum pump, the disadvantage is that the internal cavity size cannot be adjusted, so that the problem of exhaust size cannot be met, and therefore, a cavity control device for a vacuum pump is proposed. SUMMARY

[0003] In order to overcome the deficiencies in the background art, the present application discloses a cavity control device for a vacuum pump, which is fixed to the lower part of the pump cavity through the fixing frame when in use, and the supporting device is fixed to the lower part of the pump cavity through the fixing frame, and the supporting device is reversely arranged with the impeller, so as to control the size of the internal cavity of the pump body, In order to achieve the purpose of the application, the application adopts the following technical scheme: A cavity control device for a vacuum pump, comprising a fixing frame and a supporting device, the fixing frame is arranged at the lower part of the internal cavity of the pump body, and the supporting device is arranged on the fixing frame, the supporting device is composed of a second fixing block, a fixed wheel and a limiting device, the second fixing block is provided with the fixed wheel and the limiting device, the limiting device is composed of a third fixing block and a limiting plate, the third fixing block is connected with the second fixing block, and the limiting plate is arranged on the third fixing block, the supporting device on the fixing frame plays a role in the size of the internal cavity, and the curvature of the supporting device corresponds to the impeller.

[0004] The fixing frame is composed of a first fixing block, a supporting plate and an arc-shaped plate, the first fixing block is fixedly arranged at the lower part of the pump cavity, the arc-shaped plate is arranged on the first fixing block, and the supporting plate is arranged on the arc-shaped plate.

[0005] The arc-shaped plate is made of elastic material, the arc-shaped plate is a "C" type structure, the opening of the arc-shaped plate faces the inner wall of the pump body cavity, one end of the arc-shaped plate is connected with the first fixed block, and a fixed cone is arranged on the outer wall of the arc-shaped plate at one end close to the lower surface, the fixed cone is arranged in an inclined manner with the arc-shaped plate, there are at least one fixed cone, the fixed cones are arranged in order on the arc-shaped plate, a support plate is arranged on the inner wall of the arc-shaped plate, and a second fixed block is arranged on the other end of the arc-shaped plate.

[0006] The support plate is made of elastic material and has an arc-shaped structure, the support plate is fixed on the inner wall of the arc-shaped plate, and the support plate increases the elasticity of the arc-shaped plate.

[0007] The left side surface of the second fixed block is connected with the arc-shaped plate, the upper surface of the second fixed block is provided with a first fixed groove at positions close to the two ends, the first fixed groove penetrates the second fixed block, the inner wall of the first fixed groove of the second fixed block is provided with a fixed hole at the middle of the front surface and the rear surface, a roller is arranged in the fixed hole of the second fixed block, and a limiting device is arranged on the right surface of the first fixed groove of the upper surface of the second fixed block.

[0008] The roller is composed of a fixed wheel, a bearing and a fixed column, the left and right sides of the fixed wheel are provided with fixed columns, the bearing is arranged on the fixed column, the bearing is fixed in the fixed hole of the second fixed block, and the fixed wheel is movably connected with the second fixed block through the bearing.

[0009] A second fixed groove is arranged on the outer wall of the fixed wheel, there are at least one second fixed groove, the second fixed grooves are arranged in order on the fixed wheel, and the bottom of the second fixed groove on the fixed wheel is of an arc-shaped structure.

[0010] The third fixed block is fixed on the second fixed block, the third fixed block on the second fixed block corresponds to the position of the second fixed groove on the fixed wheel, a limiting plate is arranged on the left side surface of the third fixed block, one end of the limiting plate is connected with the third fixed block, the other end of the limiting plate is clamped in the second fixed groove on the fixed wheel, the limiting plate is of an arc-shaped structure, and the limiting plate is made of elastic material.

[0011] Due to the adoption of the above technical scheme, the vacuum pump cavity control device has the following beneficial effects: The vacuum pump cavity control device has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the fixing frame structure of the present invention; Figure 3 This is a schematic diagram of the support device structure of the present invention; Figure 4 This is a schematic diagram of the roller structure of the present invention; Figure 5 This is a schematic diagram of the limiting device structure of the present invention; 1. Fixing frame; 2. Support device; 3. Arc-shaped plate; 4. Support plate; 5. First fixing block; 6. Fixing cone; 7. Second fixing block; 8. Fixing hole; 9. First fixing groove; 10. Limiting device; 11. Roller; 12. Fixing wheel; 13. Second fixing groove; 14. Fixing column; 15. Bearing; 16. Third fixing block; 17. Limiting plate. Detailed Implementation

[0013] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0014] Combined with appendix Figures 1-5 A vacuum pump cavity control device includes a fixed frame 1 and a support device 2. The fixed frame 1 is located below the pump body cavity. The support device 2 is provided on the fixed frame 1. The support device 2 consists of a second fixed block 7, a fixed wheel 12, and a limiting device 10. The second fixed block 7 is provided with the fixed wheel 12 and the limiting device 10. The limiting device 10 consists of a third fixed block 16 and a limiting plate 17. The third fixed block 16 is connected to the second fixed block 7 and is provided with the limiting plate 17. The support device 2 on the fixed frame 1 serves to control the size of the cavity. The curvature of the support device 2 corresponds to that of the impeller.

[0015] The fixing frame 1 is composed of a first fixing block 5, a support plate 4 and an arc plate 3. The first fixing block 5 is fixedly installed below the pump body cavity, and the arc plate 3 is provided on the first fixing block 5. The support plate 4 is provided on the arc plate 3.

[0016] The arc-shaped plate 3 is made of elastic material and has a "C"-shaped structure. The opening of the arc-shaped plate 3 faces the inner wall of the pump body cavity. One end of the arc-shaped plate 3 is connected to the first fixing block 5. The outer wall of the arc-shaped plate 3 is provided with a fixing cone 6 near the lower surface. The fixing cone 6 is inclined to the arc-shaped plate 3. At least one fixing cone 6 is provided. The fixing cones 6 are arranged in an orderly manner on the arc-shaped plate 3. A support plate 4 is provided on the inner wall of the arc-shaped plate 3. A second fixing block 7 is provided on the other end of the arc-shaped plate 3. The fixing cone 6 is used to comb the liquid in the pump body.

[0017] The support plate 4 is made of elastic material and has an arc-shaped structure. The support plate 4 is fixed on the inner wall of the arc-shaped plate 3, and the support plate 4 increases the elasticity of the arc-shaped plate 3.

[0018] The left side of the second fixing block 7 is connected to the arc plate 3. The upper surface of the second fixing block 7 is provided with a first fixing groove 9 near both ends. The first fixing groove 9 penetrates the second fixing block 7. The middle of the front and rear surfaces of the inner wall of the first fixing groove 9 on the second fixing block 7 is provided with a fixing hole 8. A roller 11 is provided in the fixing hole 8 on the second fixing block 7. A limiting device 10 is provided on the right side of the first fixing groove 9 on the upper surface of the second fixing block 7.

[0019] The roller 11 is composed of a fixed wheel 12, a bearing 15 and a fixed column 14. Fixed columns 14 are provided on both the left and right sides of the fixed wheel 12. The fixed column 14 is provided with a bearing 15. The bearing 15 is fixed in the fixed hole 8 on the second fixed block 7. The fixed wheel 12 is movably connected to the second fixed block 7 through the bearing 15.

[0020] The outer wall of the fixed wheel 12 is provided with a second fixing groove 13. At least one second fixing groove 13 is provided. The second fixing grooves 13 are arranged in an orderly manner on the fixed wheel 12. The bottom of the second fixing groove 13 on the fixed wheel 12 is an arc-shaped structure.

[0021] The third fixing block 16 is fixed on the second fixing block 7. The third fixing block 16 on the second fixing block 7 corresponds to the second fixing groove 13 on the fixing wheel 12. A limiting plate 17 is provided on the left side of the third fixing block 16. One end of the limiting plate 17 is connected to the third fixing block 16, and the other end of the limiting plate 17 is stuck in the second fixing groove 13 on the fixing wheel 12. The limiting plate 17 has an arc-shaped structure and is made of elastic material.

[0022] In Example 1, the vacuum pump cavity control device described above is used by placing a first fixing block 5 below the pump body cavity, fixing an arc plate 3 to the first fixing block 5 with the opening of the arc plate 3 facing the inner wall of the pump body cavity, fixing a second fixing block 7 to the arc plate 3, and fixing a roller 11 and a limiting device 10 to the second fixing block 7. The roller 11 corresponds to the support plate 4. When it is necessary to adjust the size of the pump body cavity space, the rolling of the fixed wheel 12 on the second fixing block 7 is adjusted. The fixed wheel 12 is driven to roll by the fixed column 14. Since the size of the groove 13 on the fixed wheel 12 decreases one by one, the water flow causes the limiting plate 17 to slide through the second fixed groove 13 on the fixed wheel 12 in sequence. This changes the size of the arc of the arc plate 3. Due to the presence of the limiting plate 17, the fixed wheel 12 is prevented from reversing, thereby increasing the stability of the control.

[0023] The parts of this invention not described in detail are prior art. Although the invention has been specifically shown and introduced in conjunction with preferred embodiments, there are many methods and approaches to implement this technical solution. The above description is only a preferred embodiment of the invention. However, those skilled in the art should understand that various changes in form and detail can be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, and all such changes are within the scope of protection of the invention.

Claims

1. A vacuum pump cavity control device, comprising a fixed frame and a supporting device, wherein the fixed frame is disposed below the internal cavity of the pump body, and the supporting device is provided on the fixed frame, characterized in that: The support device consists of a second fixed block, a fixed wheel, and a limiting device. The second fixed block is equipped with a fixed wheel and a limiting device. The limiting device consists of a third fixed block and a limiting plate. The third fixed block is connected to the second fixed block and is equipped with a limiting plate. The support device on the fixed frame serves to determine the size of the cavity. The curvature of the support device corresponds to that of the impeller.

2. The vacuum pump cavity control device according to claim 1, characterized in that: The fixing frame consists of a first fixing block, a support plate, and an arc-shaped plate. The first fixing block is fixedly installed below the pump body cavity, and the arc-shaped plate is provided on the first fixing block, with a support plate provided on the arc-shaped plate.

3. The vacuum pump cavity control device according to claim 2, characterized in that: The arc-shaped plate is made of elastic material and has a "C"-shaped structure. The opening of the arc-shaped plate faces the inner wall of the pump body cavity. One end of the arc-shaped plate is connected to the first fixing block. The outer wall of the arc-shaped plate has a fixing cone on the end near the lower surface. The fixing cone is inclined to the arc-shaped plate. At least one fixing cone is provided. The fixing cones are arranged in an orderly manner on the arc-shaped plate. A support plate is provided on the inner wall of the arc-shaped plate. A second fixing block is provided on the other end of the arc-shaped plate.

4. The vacuum pump cavity control device according to claim 3, characterized in that: The support plate is made of elastic material and has an arc-shaped structure. The support plate is fixed to the inner wall of the arc-shaped plate, and the support plate increases the elasticity of the arc-shaped plate.

5. A vacuum pump cavity control device according to any one of claims 1-4, characterized in that: The left side of the second fixing block is connected to the arc plate. The upper surface of the second fixing block is provided with a first fixing groove near both ends. The first fixing groove penetrates the second fixing block. The middle of the front and rear surfaces of the inner wall of the first fixing groove on the second fixing block is provided with a fixing hole. A roller is provided in the fixing hole on the second fixing block. A limiting device is provided on the right surface of the first fixing groove on the upper surface of the second fixing block.

6. The vacuum pump cavity control device according to claim 5, characterized in that: The roller consists of a fixed wheel, a bearing, and a fixed post. Fixed posts are provided on both the left and right sides of the fixed wheel. Bearings are provided on the fixed posts. The bearings are fixed in the fixed holes on the second fixed block. The fixed wheel is movably connected to the second fixed block through the bearings.

7. A vacuum pump cavity control device according to claim 6, characterized in that: The outer wall of the fixed wheel is provided with a second fixing groove. At least one second fixing groove is provided. The second fixing grooves are arranged in an orderly manner on the fixed wheel. The bottom of the second fixing groove on the fixed wheel has an arc-shaped structure.

8. The vacuum pump cavity control device according to claim 1, characterized in that: The third fixing block is fixed on the second fixing block. The third fixing block on the second fixing block corresponds to the position of the second fixing groove on the fixing wheel. A limiting plate is provided on the left side of the third fixing block. One end of the limiting plate is connected to the third fixing block, and the other end of the limiting plate is stuck in the second fixing groove on the fixing wheel. The limiting plate has an arc-shaped structure and is made of elastic material.

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