Vacuum pump air tightness detection device

Abstract

The utility model discloses a vacuum pump air tightness detection device, which belongs to the technical field of air tightness detection and structurally comprises a constant pressure box, an air outlet pipe, an air inlet pipe and an air pump, a sliding seat is in sliding fit with the inner bottom surface of the constant pressure box, a placement groove is formed in the upper surface of the sliding seat, and a clamping plate is in sliding fit with the interior of the placement groove. Two quick connecting assemblies are fixedly installed on the inner top face of the constant-pressure box, one end of the air outlet pipe penetrates through the constant-pressure box and is provided with a first valve, one end of the air inlet pipe penetrates through the constant-pressure box and communicates with the output end of the air pump, and a third valve is installed at the bottom of the air inlet pipe. The branch pipe is provided with a second valve, and one end of the branch pipe is communicated with the interior of the constant-pressure box. The vacuum pump air tightness detection device is simple in operation, saves manpower, can realize rapid transfer and fixation of the vacuum pump and positioning and installation of the air outlet pipe and the air inlet pipe, shortens detection time, and improves detection efficiency.

Description

Technical Field

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

[0002] A vacuum pump refers to a device or equipment that uses mechanical, physical, chemical or physicochemical methods to evacuate the container to obtain a vacuum. Generally speaking, a vacuum pump is a device that uses various methods to improve, generate and maintain a vacuum in a closed space. The airtightness of a vacuum pump refers to whether the vacuum pump can effectively maintain a high vacuum degree during operation. The quality of its airtightness directly affects the working efficiency and performance stability of the vacuum pump. The airtightness is mainly determined by the sealing structure and process level of the pump, which directly affects the ultimate vacuum of the vacuum pump. Therefore, the airtightness of the vacuum pump needs to be checked.

[0003] When testing air tightness, the existing vacuum pump testing device needs to send the vacuum pump into a closed container. Since the vacuum pump is large and heavy, it usually requires the cooperation of multiple people. The vacuum pump cannot be quickly transferred to the closed container, and the air inlet and outlet of the vacuum pump cannot be quickly connected to the pipes in the closed container. The operation is cumbersome, the testing process is time-consuming and labor-intensive, and the testing efficiency is low. Utility Model Content

[0004] In order to solve the deficiencies in the above-mentioned prior art, the purpose of the utility model is to provide a vacuum pump airtightness detection device, which is simple to operate, saves manpower, can realize the rapid transfer and fixation of the vacuum pump and the positioning and installation with the outlet pipe and the inlet pipe, shortens the detection time and improves the detection efficiency.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] Provided is a vacuum pump air tightness detection device, comprising a constant pressure box, a pressure gauge is fixedly installed on the top of the constant pressure box, and a sealing door is provided on one side of the constant pressure box, and also comprises an outlet pipe, an inlet pipe and an air pump, a sliding seat is slidably matched with the inner bottom surface of the constant pressure box, a placement groove is provided on the upper surface of the sliding seat, a clamping plate is slidably matched in the placement groove, two quick-connect components are fixedly installed on the inner top surface of the constant pressure box, one end of the outlet pipe passes through the constant pressure box and is installed with a first valve, one end of the inlet pipe passes through the constant pressure box and is connected with the output end of the air pump, a third valve is installed at the bottom of the inlet pipe, a branch pipe is fixedly connected at the top of the inlet pipe and located at a position outside the constant pressure box, a second valve is installed on the branch pipe, and one end of the branch pipe is connected with the inside of the constant pressure box;

[0007] The quick-connect assembly includes a cylinder fixed on the top wall of the constant pressure box, a first slide rod is slidably fitted inside the cylinder, a sealing plate is fixed to the bottom end of the first slide rod, a group of bolt columns are fixed to the lower surface of the sealing plate, and the other ends of the outlet pipe and the inlet pipe are both located in the constant pressure box and pass through the sealing plates on the two quick-connect assemblies respectively.

[0008] Furthermore, the cylinder is a hollow tube with an opening at the bottom end, the top of the first slide rod is slidably fitted in the cylinder, and a tension spring is fixed between the top end of the first slide rod and the inner top wall of the cylinder.

[0009] Furthermore, a fixing frame is fixed to the bottom end of the first sliding rod, a sealing plate is fixed to the bottom end of the fixing frame, and the air outlet pipe is located inside the fixing frame.

[0010] Furthermore, a group of mounting blocks are fixed on the inner bottom surface of the constant pressure box near the sealing door, a second slide bar is fixed between the mounting blocks and the inner wall of the constant pressure box, and the slide seat is slidably sleeved on the second slide bar.

[0011] Furthermore, one end surface of the mounting block is in sliding contact with the side surface of the slide seat, and a side plate is fixed to one end of both side surfaces of the slide seat, and the side plate is slidably sleeved on the second slide rod.

[0012] Furthermore, one side of the clamping plate is rotatably connected to a threaded screw, and one end of the threaded screw penetrates the sliding seat and is threadedly connected to the sliding seat.

[0013] Furthermore, a knob is fixedly mounted on one end of the threaded screw, and a pull rod is fixedly mounted on the upper surface of the slide seat near the knob.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The vacuum pump air tightness detection device of the utility model example can quickly fix the vacuum pump and transport it to a specific position inside the constant pressure box through a slide seat. At this time, the flanges of the air inlet and outlet of the vacuum pump respectively correspond to the positions of the sealing plates on the two quick-connect assemblies. Pull the first slide bar downward to make the bolt column pass through the mounting holes of the flanges on the air inlet and outlet of the vacuum pump. The bolt column cooperates with the nut to realize a quick sealing connection between the sealing plate and the air inlet and outlet of the vacuum pump. The operation is simple and manpower is saved. The vacuum pump can be quickly transferred and fixed, and positioned and installed with the air outlet pipe and the air inlet pipe, thereby shortening the detection time and improving the detection efficiency.

[0016] 2. The vacuum pump airtightness detection device of the utility model example opens the first valve and the second valve, closes the third valve, and starts the vacuum pump to extract the gas inside the constant pressure box, so that a negative pressure is formed inside the constant pressure box. Then, the first valve is closed and the vacuum pump is stopped, and then the second valve is closed. After the pressure in the constant pressure box is stabilized, the third valve is opened, and the air pump fills air into the vacuum pump through the air inlet pipe. The third valve is closed again, and the changes in the pressure gauge are observed. If the pressure gauge shows that the pressure in the constant pressure box has risen, the airtightness performance of the vacuum pump is unqualified. If the pressure gauge does not change, it indicates that the airtightness performance of the vacuum pump is qualified. The operation is simple, and the airtightness performance of the vacuum pump can be quickly detected.

[0017] 3. The vacuum pump air tightness detection device of the utility model example can make the slide seat stably slide on the bottom surface of the constant pressure box through the sliding cooperation between the second slide rod and the side plate. The cooperation of the placement groove, the clamping plate and the threaded screw can quickly clamp and fix the vacuum pump on the slide seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the utility model when the vacuum pump is installed;

[0021] Figure 3 It is a schematic diagram of the internal structure of the constant pressure box of the utility model;

[0022] Figure 4 It is a structural schematic diagram of the slide seat of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the quick-connect assembly of the utility model.

[0024] In the figure, 1. constant pressure box, 2. sealing door, 3. outlet pipe, 4. first valve, 5. inlet pipe, 6. branch pipe, 7. quick connection assembly, 71. cylinder, 72. first slide bar, 73. tension spring, 74. fixing frame, 75. sealing plate, 76. bolt column, 8. second valve, 9. third valve, 10. air pump, 11. pressure gauge, 12. vacuum pump, 13. mounting block, 14. second slide bar, 15. slide seat, 16. side plate, 17. placement groove, 18. clamping plate, 19. threaded screw, 20. knob, 21. pull rod. DETAILED DESCRIPTION

[0025] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0026] The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0027] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. It should also be noted that, for ease of description, only the parts related to the utility model are shown in the drawings.

[0031] Example: Reference Figure 1-5A vacuum pump air tightness detection device shown in the figure comprises a constant pressure box 1, a pressure gauge 11 is fixedly installed on the top of the constant pressure box 1, and a sealing door 2 is provided on one side of the constant pressure box 1, and also comprises an outlet pipe 3, an inlet pipe 5 and an air pump 10, a slide seat 15 is slidably matched with the inner bottom surface of the constant pressure box 1, a placement groove 17 is opened on the upper surface of the slide seat 15, a clamping plate 18 is slidably matched in the placement groove 17, two quick-connect components 7 are fixedly installed on the inner top surface of the constant pressure box 1, one end of the outlet pipe 3 passes through the constant pressure box 1 and is installed with a first valve 4, one end of the inlet pipe 5 passes through the constant pressure box 1 and is connected to the output end of the air pump 10, a third valve 9 is installed at the bottom of the inlet pipe 5, a branch pipe 6 is fixedly connected at the top of the inlet pipe 5 and located at the outside of the constant pressure box 1, a second valve 8 is installed on the branch pipe 6, and one end of the branch pipe 6 is connected to the inside of the constant pressure box 1;

[0032] The quick-connect assembly 7 includes a cylinder 71 fixed on the top wall of the constant pressure box 1, a first slide bar 72 is slidably fitted inside the cylinder 71, a sealing plate 75 is fixed to the bottom end of the first slide bar 72, a group of bolt columns 76 are fixed to the lower surface of the sealing plate 75, and the other ends of the outlet pipe 3 and the inlet pipe 5 are both located in the constant pressure box 1 and pass through the sealing plates 75 on the two quick-connect assemblies 7 respectively.

[0033] During the process of using the utility model to detect the air tightness of the vacuum pump 12, the staff opens the sealing door 2, pulls out the slide 15 as a whole, and moves the vacuum pump 12 to be tested onto the slide 15, so that the bottom of the vacuum pump 12 is located in the placement groove 17, and the vacuum pump 12 is pushed by the clamping plate 18 to fix the vacuum pump 12. At this time, the slide 15 is pushed to connect the slide 15 with the vacuum pump 12 and push it to the deepest part of the constant pressure box 1. When the vacuum pump 12 is located at the deepest part of the constant pressure box 1, the flanges of the air inlet and the air outlet of the vacuum pump 12 are respectively connected to the inner flange of the constant pressure box 1. The positions of the sealing plates 75 on the two quick-connect assemblies 7 correspond to each other. Since the cylinder 71 and the first sliding rod 72 are slidably matched, the first sliding rod 72 is pulled down so that the two sealing plates 75 are respectively fitted with the flanges on the air inlet and outlet of the vacuum pump 12. The bolt column 76 will pass through the mounting holes on the flanges and is equipped with a nut. Tighten the nut at the bottom of the bolt column 76. The two sealing plates 75 can be quickly and tightly connected to the air inlet and outlet of the vacuum pump 12 through the bolt column 76. At this time, the outlet pipe 3 and the inlet pipe 5 are respectively connected to the air inlet and outlet of the vacuum pump 12.

[0034] After completing the transfer and fixation of the vacuum pump and the positioning and installation with the outlet pipe 3 and the inlet pipe 5, close the sealing door 2, open the first valve 4 and the second valve 8 first, close the third valve 9, start the vacuum pump 12, and the vacuum pump 12 will extract part of the gas in the constant pressure box 1. The air in 1 enters 12 through 6, and then enters 4 through 12 and is discharged, so that a negative pressure is formed inside the constant pressure box 1. The pressure change in the constant pressure box 1 can be observed through the barometer 11. Then, close the first valve 4 and stop the vacuum pump 12, and then close the second valve 8. After the pressure in the constant pressure box 1 is stable, open the third valve 8. The third valve 9 and the air pump 10 fill air into the vacuum pump 12 through the air inlet pipe 5. The air enters the vacuum pump 12 and is compressed, causing the pressure in the vacuum pump 12 to rise. Then, the third valve 9 is closed again, and the change in the pressure value on the barometer 11 is observed. If the barometer 11 shows that the pressure of the constant pressure box 1 has risen, it means that the high-pressure air in the vacuum pump 12 has leaked to the inside of the constant pressure box 1, and the airtightness of the vacuum pump 12 is unqualified. If there is no change in the barometer 11, it means that the airtightness of the vacuum pump 12 is qualified. The operation is simple, and the airtightness of the vacuum pump 12 can be quickly detected.

[0035] In order to realize that one end of the air outlet pipe 3 and the air inlet pipe 5 are fixed to the two quick-connect components 7 respectively, the first slide bar 72 can be automatically recovered into the cylinder 71. In this embodiment, the cylinder 71 is a hollow tube with an opening at the bottom end. The top of the first slide bar 72 is slidably fitted in the cylinder 71. A tension spring 73 is fixed between the top of the first slide bar 72 and the inner top wall of the cylinder 71. A fixing frame 74 is fixed to the bottom end of the first slide bar 72. A sealing plate 75 is fixed to the bottom end of the fixing frame 74. The air outlet pipe 3 is located inside the fixing frame 74. The setting of the tension spring 73 can enable the first slide bar 72 to drive the sealing plate 75 to automatically rise and move back to the initial position when it is not affected by external forces, so as to avoid affecting the subsequent transfer and detection of the vacuum pump 12. The setting of the fixing frame 74 can enable one end of the air outlet pipe 3 to pass through the center position of the upper surface of the sealing plate 75.

[0036] In order to make the slide 15 stably slide on the inner bottom surface of the constant pressure box 1, in this embodiment, a group of mounting blocks 13 are fixed at the position of the inner bottom surface of the constant pressure box 1 near the sealing door 2, and a second slide bar 14 is fixed between the mounting block 13 and the inner side wall of the constant pressure box 1, and the slide 15 is slidably sleeved on the second slide bar 14. Through the provision of the second slide bar 14, the slide 15 can stably move laterally along the direction of the second slide bar 14, that is, the structural strength of the slide 15 is improved, and the stability of the slide 15 when moving is also enhanced.

[0037] Preferably, one end face of the mounting block 13 is in sliding contact with the side face of the slide 15, and a side plate 16 is fixed to one end of both sides of the slide 15, and the side plate 16 is slidably sleeved on the second slide rod 14. The arrangement of the mounting block 13 can prevent the slide 15 from sliding out of the constant pressure box 1, and the sliding contact between the mounting block 13 and the slide 15 can limit the slide 15 between the two mounting blocks 13, thereby improving the structural strength of the slide 15.

[0038] In order to enable the clamping plate 18 to squeeze the vacuum pump 12 in the placement groove 17, in this embodiment, a threaded screw 19 is rotatably connected to one side of the clamping plate 18, and one end of the threaded screw 19 passes through the slide 15 and is threadedly connected to the slide 15. The threaded connection between the threaded screw 19 and the slide 15 can drive the clamping plate 18 to stably squeeze the vacuum pump 12 in the placement groove 17 by rotating the threaded screw 19.

[0039] In order to facilitate the user to rotate the threaded screw 19 and push-pull the slide 15 , in this embodiment, a knob 20 is fixedly installed at one end of the threaded screw 19 , and a pull rod 21 is fixedly installed on the upper surface of the slide 15 near the knob 20 .

[0040] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.

[0041] Except for the technical features described in the specification, the other technical features are known technologies to those skilled in the art. In order to highlight the innovative features of the present utility model, the other technical features will not be described in detail here.

Claims

1. A vacuum pump air tightness detection device, comprising a constant pressure box (1), a pressure gauge (11) is fixedly installed on the top of the constant pressure box (1), and a sealing door (2) is provided on one side of the constant pressure box (1), characterized in that: It also includes an air outlet pipe (3), an air inlet pipe (5) and an air pump (10); a sliding seat (15) is slidably matched on the inner bottom surface of the constant pressure box (1); a placement groove (17) is provided on the upper surface of the sliding seat (15); a clamping plate (18) is slidably matched in the placement groove (17); two quick-connect components (7) are fixedly installed on the inner top surface of the constant pressure box (1); one end of the air outlet pipe (3) passes through the constant pressure box (1) and is installed with a first valve (4); one end of the air inlet pipe (5) passes through the constant pressure box (1) and is connected to the output end of the air pump (10); a third valve (9) is installed at the bottom of the air inlet pipe (5); a branch pipe (6) is fixedly connected at the top of the air inlet pipe (5) and located at the outside of the constant pressure box (1); a second valve (8) is installed on the branch pipe (6); one end of the branch pipe (6) is connected to the inside of the constant pressure box (1); The quick-connect assembly (7) comprises a cylinder (71) fixed on the inner top wall of the constant pressure box (1), a first slide bar (72) slidingly fitted in the cylinder (71), a sealing plate (75) fixed at the bottom end of the first slide bar (72), a group of bolt columns (76) fixed on the lower surface of the sealing plate (75), and the other ends of the air outlet pipe (3) and the air inlet pipe (5) are both located in the constant pressure box (1) and respectively penetrate the sealing plates (75) on the two quick-connect assemblies (7).

2. The vacuum pump airtightness detection device according to claim 1, characterized in that: The cylinder (71) is a hollow tube with an opening at the bottom end. The top of the first sliding rod (72) is slidably fitted in the cylinder (71). A tension spring (73) is fixed between the top of the first sliding rod (72) and the inner top wall of the cylinder (71).

3. The vacuum pump airtightness detection device according to claim 2, characterized in that: A fixing frame (74) is fixed at the bottom end of the first sliding rod (72), a sealing plate (75) is fixed at the bottom end of the fixing frame (74), and the air outlet pipe (3) is located inside the fixing frame (74).

4. The vacuum pump airtightness detection device according to claim 1, characterized in that: A group of mounting blocks (13) are fixed on the inner bottom surface of the constant pressure box (1) near the sealing door (2), a second sliding rod (14) is fixed between the mounting blocks (13) and the inner side wall of the constant pressure box (1), and the sliding seat (15) is slidably sleeved on the second sliding rod (14).

5. The vacuum pump airtightness detection device according to claim 4, characterized in that: One end surface of the mounting block (13) is in sliding contact with the side surface of the slide seat (15), and a side plate (16) is fixed to one end of both side surfaces of the slide seat (15), and the side plate (16) is slidably sleeved on the second slide rod (14).

6. The vacuum pump airtightness detection device according to claim 5, characterized in that: One side of the clamping plate (18) is rotatably connected to a threaded screw rod (19), and one end of the threaded screw rod (19) penetrates the slide seat (15) and is threadedly connected to the slide seat (15).

7. The vacuum pump airtightness detection device according to claim 6, characterized in that: A knob (20) is fixedly mounted on one end of the threaded screw rod (19), and a pull rod (21) is fixedly mounted on the upper surface of the slide seat (15) at a position close to the knob (20).

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