Vacuum test device for leak detection

Abstract

The utility model belongs to the technical field of leak detection, and discloses a vacuum test device for leak detection, which comprises an air suction mechanism for sucking air to form vacuum, and a box body mechanism for placing test devices in batches and providing a closed visible vacuum test environment, the top of the box body mechanism is provided with a sealing mechanism for ensuring a closed test environment, the air suction mechanism is mounted at one end of the top of the box body mechanism and comprises a support frame, a vacuum pump is mounted on the support frame, the top of the vacuum pump is provided with a pressure gauge, and the bottom of the vacuum pump is provided with an exhaust pipe. According to the vacuum test device for leak detection, a plurality of devices can be tested at a time through the arrangement of batch test devices, the working efficiency is effectively improved, the test conditions of the devices can be visually observed through the arrangement of visual tests, and the test efficiency is improved through the arrangement of the pressing fixing device. And the stability of the device in the test process is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of leak detection, in particular to a vacuum testing device for leak detection. Background Art

[0002] Vacuum leak detection technology has been gradually widely used in vacuum devices, food packaging, aerospace and other fields. There are two main types of vacuum leak detection methods: one is the pressurization method, which is to fill the container under inspection with a certain pressure of exploration gas or liquid. When there is a leak on the container, the exploration substance escapes from the leak; as long as we use appropriate detectors to find out whether the exploration substance escapes, where it escapes, and how much escapes, we can determine whether there is a leak and the location and size of the leak; methods belonging to this category include the bubble method, the halogen leak detector external probe method, the ammonia leak detection method, the gas-sensitive semiconductor leak detection method, and the ammonia mass spectrometer leak detector pressurization method. The second is the evacuation method, which is to evacuate the inside of the container under inspection and apply the exploration substance (gas or liquid) to the suspicious place outside the container. If there is a leak, the exploration substance can enter the container through the leak, and the detector connected to the container under inspection will detect the exploration substance, so that the existence and size of the leak can be determined. Methods belonging to this category include the static boost method, the spark leak detector method, the discharge tube indication method, the halogen leak detector internal probe method, the vacuum gauge method, the ion pump leak detection method and the ammonia mass spectrometer leak detector evacuation method.

[0003] In contrast, the Chinese patent with announcement number CN220411497U discloses a vacuum testing device for leak detection, including a vacuum chamber device, a vacuum pump system and a general support frame; the vacuum chamber device includes a vacuum chamber, an automatic opening and closing device and an interface flange assembly, and the vacuum chamber as a whole is an open cylindrical structure; the interface flange assembly is welded by a workbench, an interface flange and a flange seat, and a sealing ring is arranged on the workbench; the vacuum pump system is connected to the interface flange and can evacuate the vacuum chamber; the automatic opening and closing device includes a driving mechanism and a parallelogram connecting rod mechanism.

[0004] However, the above patent can only test a single device at a time and cannot test devices in batches. The working efficiency is low, and the test conditions of the device cannot be observed intuitively. Therefore, a new device needs to be designed. Utility Model Content

[0005] The purpose of the utility model is to provide a vacuum test device for leak detection to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A vacuum testing device for leak detection includes an air suction mechanism for sucking air to form a vacuum, and is characterized in that it also includes a box mechanism for placing test devices in batches and providing a closed visible vacuum test environment, a sealing mechanism for ensuring a closed test environment is arranged on the top of the box mechanism, and the air suction mechanism is installed at one end of the top of the box mechanism.

[0008] The box structure comprises a vacuum box, a liquid inlet pipe is arranged on one side of the vacuum box, a liquid outlet pipe is arranged on the side of the vacuum box away from the liquid inlet pipe, a box cover is arranged on the top of the vacuum box, two pieces of tempered glass are symmetrically installed on the front and back of the vacuum box, a placing rack is arranged inside the vacuum box, and a lower pressing rack is arranged above the placing rack;

[0009] The sealing mechanism comprises a box door, a handle is arranged on the top of the box door, rotating handles are symmetrically arranged at both ends of the box door, and a tightening block is arranged at the bottom of the rotating handle.

[0010] Furthermore: the suction mechanism includes a support frame, a vacuum pump is installed on the support frame, a pressure gauge is arranged on the top of the vacuum pump, and an exhaust pipe is arranged on the bottom of the vacuum pump.

[0011] Furthermore: the exhaust pipe is arranged through the support frame and the box cover.

[0012] Furthermore: the placing rack is snap-connected to the vacuum box, and the pressing rack is movably connected to the vacuum box.

[0013] Furthermore: the box cover is hingedly connected to the vacuum box.

[0014] Furthermore: the placing rack and the pressing rack are both made of 204 stainless steel.

[0015] Furthermore: the tightening block is bolted to the rotating handle.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. Through the setting of batch test devices, multiple devices can be tested at one time, which effectively improves work efficiency;

[0018] 2. Through the setting of visual test, the test status of the device can be observed intuitively;

[0019] 3. By pressing down to fix the device, the stability of the device during the test is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a vacuum test device for leak detection described in the utility model;

[0021] Figure 2 This is an axonometric diagram of a box structure of a vacuum test device for leak detection described in the utility model;

[0022] Figure 3 It is a schematic diagram of the structure of the air suction mechanism of a vacuum test device for leak detection described in the utility model;

[0023] Figure 4 The utility model is a schematic diagram of the sealing mechanism structure of a vacuum testing device for leak detection.

[0024] In the accompanying drawings: 101, vacuum box; 102, liquid inlet pipe; 103, liquid outlet pipe; 104, box cover; 105, tempered glass; 106, placement rack; 107, lower pressure rack; 201, support frame; 202, vacuum pump; 203, pressure gauge; 204, exhaust pipe; 301, box door; 302, handle; 303, rotating handle; 304, tightening block. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-Figure 4 A vacuum testing device for leak detection includes an air suction mechanism for sucking air to form a vacuum, and also includes a box mechanism for placing test devices in batches and providing a closed visual vacuum test environment. A sealing mechanism for ensuring a closed test environment is arranged on the top of the box mechanism, and the air suction mechanism is installed at one end of the top of the box mechanism.

[0027] In this embodiment: the suction mechanism includes a support frame 201, a vacuum pump 202 is installed on the support frame 201, a pressure gauge 203 is arranged on the top of the vacuum pump 202, and an exhaust pipe 204 is arranged at the bottom of the vacuum pump 202. The exhaust pipe 204 runs through the support frame 201 and the box cover 104. The vacuum pump 202 evacuates the vacuum box 101 through the exhaust pipe 204 under the support of the support frame 201, and adjusts the internal pressure of the vacuum box 101 according to the value of the pressure gauge 203;

[0028] In this embodiment: the box body mechanism includes a vacuum box 101, a liquid inlet pipe 102 is provided on one side of the vacuum box 101, a liquid outlet pipe 103 is provided on the side of the vacuum box 101 away from the liquid inlet pipe 102, a box cover 104 is provided on the top of the vacuum box 101, two tempered glasses 105 are symmetrically installed on the front and back of the vacuum box 101, a placing rack 106 is provided inside the vacuum box 101, a lower pressing rack 107 is provided above the placing rack 106, the placing rack 106 and the lower pressing rack 107 are both made of 204 stainless steel, the placing rack 106 is snap-connected to the vacuum box 101, the lower pressing rack 107 is movably connected to the vacuum box 101, and the box cover 104 is hinged to the vacuum box 101;

[0029] In this embodiment: the sealing mechanism includes a box door 301, a handle 302 is provided on the top of the box door 301, rotating handles 303 are symmetrically installed at both ends of the box door 301, a tightening block 304 is installed at the bottom of the rotating handle 303, and the tightening block 304 is bolted to the rotating handle 303. The box door 301 is closed by the handle 302, and the rotating handle 303 is rotated to drive the tightening block 304 to close the box door 301.

[0030] Working principle: First, open the box cover 104 on the top of the vacuum box 101, take out the lower pressing frame 107, seal the device to be tested and place it on the placement frame 106, put it back on the lower pressing frame 107 to freely press down and fix the device to be tested to prevent the device from floating and affecting the test, then close the box cover 104, close the liquid outlet pipe 103, inject a proper amount of test liquid into the vacuum box 101 through the liquid inlet pipe 102 to submerge the device to be tested, close the box door 301 through the handle 302, and turn the rotating handle 303 to drive the tightening block 304 to close Box door 301, finally, the vacuum pump 202, supported by the support frame 201, evacuates the vacuum box 101 through the exhaust pipe 204, and adjusts the internal pressure of the vacuum box 101 according to the value of the pressure gauge 203. Since a pressure difference is formed between the test device cavity and the inside of the vacuum box 101, if there is a leak in the test device, bubbles will be emitted in the experimental liquid. At this time, the airtightness of the test device can be intuitively observed through the tempered glass 105 on the front and back of the vacuum box 101, thereby achieving the purpose of vacuum leak detection.

[0031] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum test device for leak detection, comprising an air suction mechanism for sucking air to form a vacuum, characterized in that: It also includes a box body mechanism for placing test devices in batches and providing a closed visible vacuum test environment, a sealing mechanism for ensuring a closed test environment is arranged on the top of the box body mechanism, and the suction mechanism is installed at one end of the top of the box body mechanism; The box structure comprises a vacuum box (101), a liquid inlet pipe (102) is arranged on one side of the vacuum box (101), a liquid outlet pipe (103) is arranged on the side of the vacuum box (101) away from the liquid inlet pipe (102), a box cover (104) is arranged on the top of the vacuum box (101), two pieces of tempered glass (105) are symmetrically installed on the front and back sides of the vacuum box (101), a placing rack (106) is arranged inside the vacuum box (101), and a lower pressing rack (107) is arranged above the placing rack (106); The sealing mechanism comprises a box door (301), a handle (302) is arranged on the top of the box door (301), rotating handles (303) are symmetrically installed at both ends of the box door (301), and a tightening block (304) is installed at the bottom of the rotating handle (303).

2. A vacuum test device for leak detection according to claim 1, characterized in that: The air suction mechanism comprises a support frame (201), a vacuum pump (202) is mounted on the support frame (201), a pressure gauge (203) is arranged on the top of the vacuum pump (202), and an air extraction pipe (204) is arranged on the bottom of the vacuum pump (202).

3. A vacuum test device for leak detection according to claim 2, characterized in that: The air extraction pipe (204) is arranged to penetrate the support frame (201) and the box cover (104).

4. A vacuum test device for leak detection according to claim 1, characterized in that: The placing frame (106) is snap-connected to the vacuum box (101), and the lower pressing frame (107) is movably connected to the vacuum box (101).

5. A vacuum test device for leak detection according to claim 1, characterized in that: The box cover (104) is hingedly connected to the vacuum box (101).

6. A vacuum test device for leak detection according to claim 1, characterized in that: The placing rack (106) and the pressing rack (107) are both made of 204 stainless steel.

7. A vacuum test device for leak detection according to claim 1, characterized in that: The tightening block (304) is bolted to the rotating handle (303).

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