Screw vacuum pump air tightness detection tool

Abstract

The utility model provides a screw vacuum pump air tightness detection tool, which relates to the technical field of air tightness detection equipment, and comprises a base, a screw vacuum pump and a fixing frame, the top of the fixing frame is provided with a clamping mechanism, one side of the fixing frame is provided with a support frame, the top of the support frame is provided with an air tightness detection mechanism, and the air tightness detection mechanism is provided with a clamping mechanism. A blocking mechanism is arranged on one side of the base; the clamping plate is hinged to the output end of the first air cylinder, and the output end of the first air cylinder can drive the clamping plate to rotate towards the screw vacuum pump, so that the bottom of the clamping plate is attached to the top of the screw vacuum pump, the clamping plate clamps the top of the screw vacuum pump, and the screw vacuum pump is fixed to the top of the base. The third air cylinder can drive the clamping plate to move towards the bottom of the screw vacuum pump, the clamping plate is matched with the baffle on one side of the base to clamp the screw vacuum pump again, and therefore the screw vacuum pump is fixed to the top of the base more stably.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness detection equipment, in particular to an air tightness detection tool for a screw vacuum pump. Background Art

[0002] The screw vacuum pump is an air extraction device that uses a pair of screws to rotate synchronously at high speed in opposite directions in the pump housing to produce suction and exhaust effects. During the assembly process of the screw vacuum pump, the parts in the pump body and pump cover are installed. After the pump body and pump cover are installed, the vacuum pump needs to be tested for air tightness. The common method for testing the air tightness of the screw vacuum pump is to immerse it in the water of the water injection pool and inflate its closed inner cavity, then observe whether there are bubbles in the water and judge the air tightness condition;

[0003] During the production process of the screw vacuum pump, it is necessary to perform an air tightness test on the inside of its shell to determine whether the air tightness of the shell meets the requirements. When performing the air tightness test, the staff is required to manually use a clamp to lock the screw vacuum pump in the testing equipment. First, it needs to be centered and then aligned. The operation is cumbersome, labor-intensive, and has low work efficiency. Therefore, the utility model proposes a screw vacuum pump air tightness testing tool to solve the above problem. Utility Model Content

[0004] In view of the above problems, the utility model proposes a screw vacuum pump air tightness detection tool to solve the problems of the prior art of using a manual clamp to fix the screw vacuum pump, which is cumbersome to operate, labor-intensive and low in work efficiency.

[0005] To achieve the purpose of the utility model, the utility model is implemented through the following technical scheme: a screw vacuum pump airtightness detection tool, including a base, a screw vacuum pump and a fixed frame, a screw vacuum pump is provided on the top of the base, a fixed frame is fixedly connected to the back side of the base, a clamping mechanism is provided on the top of the fixed frame, a support frame is provided on one side of the fixed frame, an airtightness detection mechanism is provided on the top of the support frame, and a sealing mechanism is provided on one side of the base.

[0006] Further improvements are as follows: the clamping mechanism includes a No. 1 clamping plate, a No. 1 cylinder and a connecting seat, the No. 1 clamping plate is hinged inside the fixing frame, the No. 1 cylinder is hinged on the top of the fixing frame, the output end of the No. 1 cylinder is fixedly connected to the connecting seat, and the output end of the No. 1 cylinder is hinged to the top of the No. 1 clamping plate through the connecting seat.

[0007] A further improvement is that the blocking mechanism includes a No. 2 cylinder and a blocking plate, the No. 2 cylinder is installed on one side of the base, the output end of the No. 2 cylinder is fixedly connected to the blocking plate, and the position of the blocking plate is parallel to the position of the screw vacuum pump discharge port.

[0008] A further improvement is that a No. 3 cylinder is installed on the side of the base away from the No. 2 cylinder, the output end of the No. 3 cylinder is connected to the No. 2 clamping plate, and the No. 2 clamping plate is parallel to the position of the screw vacuum pump.

[0009] A further improvement is that the air-tightness detection mechanism includes an air-tightness detection instrument, an air supply pipe, a pressure gauge and a connecting cover; the top of the support frame is fixedly connected to the air-tightness detection instrument, the output end of the air-tightness detection instrument is connected to the air supply pipe, the bottom end of the air supply pipe is connected to the connecting cover, and a pressure gauge is installed on the air-tightness detection instrument.

[0010] A further improvement is that a sealing ring is provided on the inner side of the connecting cover, the inner diameter of the connecting cover is equal to the outer diameter of the feed port at the top of the screw vacuum pump, and the sealing ring is fitted and connected to the outer side of the feed port.

[0011] A further improvement is that the shape of the No. 1 clamping plate is set to be an "L"-shaped structure, a solenoid valve is provided on the gas pipe, and supporting feet are symmetrically fixedly connected to the bottom of the base.

[0012] The beneficial effects of the utility model are as follows: the splint is hinged to the output end of the No. 1 cylinder, and the output end of the No. 1 cylinder can drive the splint to rotate toward the screw vacuum pump, so that the bottom of the splint fits together with the top of the screw vacuum pump, and then the splint clamps the top of the screw vacuum pump to fix the screw vacuum pump to the top of the base; the No. 3 cylinder can drive the splint to move toward the bottom of the screw vacuum pump, and the splint cooperates with the baffle on one side of the base to clamp the screw vacuum pump again, so as to make the screw vacuum pump more firmly fixed on the top of the base, so as to solve the problems of the prior art of using manual clamps to fix the screw vacuum pump, which is cumbersome to operate, labor-intensive and low working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the front view of the utility model;

[0014] Figure 2 It is a front view of the utility model;

[0015] Figure 3 It is a side view of the utility model.

[0016] Among them: 1. Base; 2. Screw vacuum pump; 3. Fixed frame; 4. No. 1 clamp; 5. No. 1 cylinder; 6. Connecting seat; 7. No. 2 cylinder; 8. Sealing plate; 9. Support frame; 10. Air tightness tester; 11. Gas pipe; 12. No. 3 cylinder; 13. No. 2 clamp; 14. Pressure gauge; 15. Connecting cover. DETAILED DESCRIPTION

[0017] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with an embodiment. The embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.

[0018] according to Figure 1 , 2 As shown in Figure 3, this embodiment proposes a screw vacuum pump airtightness detection tool, including a base 1, a screw vacuum pump 2 and a fixing frame 3. The top of the base 1 is provided with a screw vacuum pump 2, and the back side of the base 1 is fixedly connected with the fixing frame 3, the top of the fixing frame 3 is provided with a clamping mechanism, one side of the fixing frame 3 is provided with a supporting frame 9, and the top of the supporting frame 9 is provided with an airtightness detection mechanism, one side of the base 1 is provided with a sealing mechanism, and the bottom of the base 1 is symmetrically fixedly connected with supporting feet. The screw vacuum pump 2 is placed on the top of the base 1, and the screw vacuum pump 2 is fixed to the top of the base 1 by the clamping mechanism, and then the air outlet of the screw vacuum pump 2 is blocked by the sealing mechanism, and then the airtightness detection mechanism is connected with the air inlet of the screw vacuum pump 2, so that it automatically detects the airtightness of the screw vacuum pump 2.

[0019] The clamping mechanism includes a No. 1 clamping plate 4, a No. 1 cylinder 5 and a connecting seat 6. The interior of the fixed frame 3 is hinged with the No. 1 clamping plate 4, the top of the fixed frame 3 is hinged with the No. 1 cylinder 5, the output end of the No. 1 cylinder 5 is fixedly connected to the connecting seat 6, the output end of the No. 1 cylinder 5 is hinged to the top of the No. 1 clamping plate 4 through the connecting seat 6, the shape of the No. 1 clamping plate 4 is set to an "L" shape structure, the No. 1 clamping plate 4 is hinged to the output end of the No. 1 cylinder 5, the output end of the No. 1 cylinder 5 can drive the No. 1 clamping plate 4 to rotate toward the screw vacuum pump 2, so that the bottom of the No. 1 clamping plate 4 is fitted together with the top of the screw vacuum pump 2, and then the No. 1 clamping plate 4 clamps the top of the screw vacuum pump 2, and fixes the screw vacuum pump 2 to the top of the base 1. Because the top of the No. 1 cylinder 5 is hinged to the fixed frame 3, the No. 1 cylinder 5 can also rotate with the No. 1 clamping plate 4, and will not interfere with the rotation of the No. 1 clamping plate 4.

[0020] The blocking mechanism includes a No. 2 cylinder 7 and a blocking plate 8. The No. 2 cylinder 7 is installed on one side of the base 1. The output end of the No. 2 cylinder 7 is fixedly connected to the blocking plate 8. The position of the blocking plate 8 is parallel to the position of the discharge port of the screw vacuum pump 2. Since the blocking plate 8 is fixed to the output end of the No. 2 cylinder 7, the No. 2 cylinder 7 can drive the blocking plate 8 to move toward the air outlet at the bottom of the screw vacuum pump 2 until the blocking plate 8 is fitted together with the air outlet to block the air outlet.

[0021] A No. 3 cylinder 12 is installed on the side of the base 1 away from the No. 2 cylinder 7, and a No. 2 clamping plate 13 is connected to the output end of the No. 3 cylinder 12. The No. 2 clamping plate 13 is parallel to the screw vacuum pump 2 in front and back. Since the No. 2 clamping plate 13 is fixed together with the output end of the No. 3 cylinder 12, the No. 3 cylinder 12 can drive the No. 2 clamping plate 13 to move toward the bottom of the screw vacuum pump 2, and the No. 2 clamping plate 13 cooperates with the baffle on one side of the base 1 to clamp the screw vacuum pump 2 again, so that the screw vacuum pump 2 is fixed more firmly on the top of the base 1.

[0022] The air tightness detection mechanism includes an air tightness detector 10, an air supply pipe 11, a pressure gauge 14 and a connecting cover 15. The top of the support frame 9 is fixedly connected with the air tightness detector 10, the output end of the air tightness detector 10 is connected with the air supply pipe 11, and the bottom end of the air supply pipe 11 is connected with the connecting cover 15. The air tightness detector 10 is installed with the pressure gauge 14, and the air supply pipe 11 is provided with a solenoid valve. First, the air tightness detector 10 fills a certain pressure and volume of gas into the base 1 to be tested through the air supply pipe 11 and the connecting cover 15, and then the equipment will cut off the inflation source and close the valve to form a closed environment inside the base 1. After a period of stillness, the equipment will measure the pressure inside the pump body again, and observe whether the pressure gauge 14 has changed. If there is a leak in the base 1, the gas pressure inside it will drop after a period of time. By comparing the initial and final pressure values, the air tightness condition of the pump body can be judged.

[0023] A sealing ring is provided on the inner side of the connecting cover 15, and the inner diameter of the connecting cover 15 is equal to the outer diameter of the feed port at the top of the screw vacuum pump 2. The sealing ring is fitted and connected to the outer side of the feed port. The sealing ring is respectively fitted to the connecting cover 15 and the air inlet of the screw vacuum pump 2. The sealing ring can fill the gap between the connecting cover 15 and the screw vacuum pump 2 to ensure the sealing between the connecting cover 15 and the screw vacuum pump 2.

[0024] The screw vacuum pump air tightness testing tool, the No. 1 clamping plate 4 is hinged to the output end of the No. 1 cylinder 5, and the output end of the No. 1 cylinder 5 can drive the No. 1 clamping plate 4 to rotate toward the screw vacuum pump 2, so that the bottom of the No. 1 clamping plate 4 is fitted together with the top of the screw vacuum pump 2, and then the No. 1 clamping plate 4 clamps the top of the screw vacuum pump 2 to fix the screw vacuum pump 2 on the top of the base 1, and the air tightness tester 10 fills a certain pressure and volume of gas into the base 1 to be tested through the air supply pipe 11 and the connecting cover 15, and then the equipment will cut off the inflation source and close the valve to form a closed environment inside the base 1. After a period of static state, the equipment will measure the pressure inside the pump body again, and by observing whether the pressure gauge 14 has changed, if there is a leak in the base 1, the gas pressure inside it will drop after a period of time, and by comparing the initial and final pressure values, the air tightness condition of the pump body can be judged.

[0025] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A screw vacuum pump air tightness detection tool, comprising a base (1), a screw vacuum pump (2) and a fixing frame (3), characterized in that: A screw vacuum pump (2) is provided on the top of the base (1); a fixing frame (3) is fixedly connected to the back side of the base (1); a clamping mechanism is provided on the top of the fixing frame (3); a support frame (9) is provided on one side of the fixing frame (3); an airtightness detection mechanism is provided on the top of the support frame (9); and a sealing mechanism is provided on one side of the base (1); The clamping mechanism comprises a No. 1 clamping plate (4), a No. 1 cylinder (5) and a connecting seat (6); the No. 1 clamping plate (4) is hingedly connected inside the fixing frame (3); the No. 1 cylinder (5) is hingedly connected at the top of the fixing frame (3); the output end of the No. 1 cylinder (5) is fixedly connected to the connecting seat (6); and the output end of the No. 1 cylinder (5) is hingedly connected to the top of the No. 1 clamping plate (4) via the connecting seat (6).

2. The air tightness detection tool for a screw vacuum pump according to claim 1, characterized in that: The blocking mechanism comprises a No. 2 cylinder (7) and a blocking plate (8); the No. 2 cylinder (7) is installed on one side of the base (1); the output end of the No. 2 cylinder (7) is fixedly connected to the blocking plate (8); the position of the blocking plate (8) is parallel to the position of the discharge port of the screw vacuum pump (2).

3. The air tightness detection tool for a screw vacuum pump according to claim 2, characterized in that: A No. 3 cylinder (12) is installed on the side of the base (1) away from the No. 2 cylinder (7), and the output end of the No. 3 cylinder (12) is connected to a No. 2 clamping plate (13), and the No. 2 clamping plate (13) is parallel to the screw vacuum pump (2) in front and back.

4. The air tightness detection tool for a screw vacuum pump according to claim 1, characterized in that: The air tightness detection mechanism comprises an air tightness detector (10), an air supply pipe (11), a pressure gauge (14) and a connection cover (15); the top of the support frame (9) is fixedly connected to the air tightness detector (10); the output end of the air tightness detector (10) is connected to the air supply pipe (11); the bottom end of the air supply pipe (11) is connected to the connection cover (15); and the pressure gauge (14) is installed on the air tightness detector (10).

5. The air tightness detection tool for a screw vacuum pump according to claim 4, characterized in that: A sealing ring is provided on the inner side of the connection cover (15), the inner diameter of the connection cover (15) is equal to the outer diameter of the feed port at the top of the screw vacuum pump (2), and the sealing ring is fitted and connected to the outer side of the feed port.

6. The air tightness detection tool for a screw vacuum pump according to claim 5, characterized in that: The shape of the No. 1 clamping plate (4) is set to be an "L"-shaped structure, the gas supply pipe (11) is provided with a solenoid valve, and the bottom of the base (1) is symmetrically fixedly connected with supporting feet.

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