Helium leak detection device for biphenyl hot box leak detection

Abstract

The utility model discloses a helium leak detection device for leak detection of a biphenyl hot box in the technical field of helium leak detection devices, which comprises a box body, and a first purification mechanism and a second purification mechanism are sequentially arranged at the bottom of the box body from bottom to top. Gas on the surface of a detection part is extracted through an exhaust pipe, the gas firstly passes through a first purification mechanism, moisture contained in the gas is adsorbed through a drying agent in a first insertion box, then the gas passes through a second purification mechanism, and impurities contained in the gas are adsorbed through activated carbon in a second insertion box; and finally, the purified gas can be detected through a detector, and double-layer purification can be performed on the extracted gas when leakage detection is performed on the biphenyl hot box, so that precise leakage detection on the helium content is improved, the helium leakage detection precision and the working efficiency are realized, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of helium leak detection devices, in particular to a helium leak detection device for leak detection of a biphenyl hot box. Background Art

[0002] At present, helium leak detectors use helium as the detection gas. Due to the characteristics of helium such as small molecules, light weight, strong diffusion penetration, fast reaction and stability, helium leak detection devices have received attention and are widely used.

[0003] The existing patent publication number is CN216144476U, which discloses a helium leak detection device, including a box body, a sealing cover is arranged on the top surface of the box body, and a threaded ring is welded on the bottom surface of the sealing cover, the threaded ring is threadedly connected with the threaded opening opened on the top surface of the box body, and a plurality of rubber columns are bonded to the end surface of the threaded ring. In the utility model, the threaded ring is threadedly connected with the threaded opening of the box body by extending the threaded ring of the sealing cover to the threaded opening correspondingly opened on the top surface of the box body, and then the plurality of rubber columns arranged around the end surface of the threaded ring and the sealing ring bonded to the top surface of the support ring are in contact with the object to be detected. Since the sealing ring is composed of a plurality of rubber rings with different diameters, the tightness of the connection between the object to be detected and the support ring can be increased, the object to be detected can be fixed, and the sealing between the accommodating cavity and the detection cavity on both sides of the support ring can be ensured. The rubber pad arranged on the top surface of the box body is in contact with the edge of the sealing cover, so that the sealing of the box body can be ensured, thereby increasing the leak detection accuracy.

[0004] When the existing biphenyl hot box is tested for helium leaks, it is necessary to use a vacuum pump to suck the surface gas from the biphenyl hot box surface for detection. However, the gas contains many impurities and moisture, which reduces the accuracy of helium detection. Therefore, we propose a helium leak detection device for biphenyl hot box leak detection to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] Therefore, the purpose of the utility model is to provide a helium leak detection device for biphenyl hot box leak detection, which can solve the problem that when the existing biphenyl hot box is subjected to helium leak detection, it is necessary to use a vacuum pump to suck the surface gas of the biphenyl hot box surface for detection, but the accuracy of helium detection is reduced due to the presence of many impurities and moisture in the gas.

[0007] In order to solve the above technical problems, the utility model provides a helium leak detection device for biphenyl hot box leak detection, which adopts the following technical solution: comprising a box body, wherein the bottom of the box body is provided with a first purification mechanism and a second purification mechanism in sequence from bottom to top;

[0008] The first purification mechanism includes a first shell, a first slot is provided on the left inner wall of the first shell inner cavity, a first socket is provided on the right side of the first shell, a first plug box is provided on the surface of the first shell, sealing strips are fixedly provided on the upper and lower sides of the inner wall of the first socket, the first plug box is inserted into the inner cavity of the first shell through the first socket and the first slot, and a desiccant is provided inside the first plug box;

[0009] The second purification mechanism includes a second shell, a second slot is provided on the left inner wall of the second shell inner cavity, a second socket is provided on the right side of the second shell, a second plug box is provided on the surface of the second shell, sealing strips are fixedly provided on the upper and lower sides of the inner wall of the second socket, the second plug box is inserted into the inner cavity of the second shell through the second socket and the second slot, and activated carbon is provided inside the second plug box.

[0010] Optionally, a first electric valve is fixedly installed at the bottom of the box body, the bottom of the first electric valve is fixedly connected to the top of the second shell, and the inner cavity of the first electric valve is connected to the inner cavity of the box body.

[0011] By adopting the above technical solution, the present solution provides a first electric valve, and the first electric valve is opened to absorb the gas drawn into the exhaust pipe into the box.

[0012] Optionally, a vacuum pump is fixedly installed at the bottom of the first shell, and an exhaust pipe is fixedly installed at the bottom of the vacuum pump.

[0013] By adopting the above technical solution, the present solution sets up a vacuum pump, starts the vacuum pump and detects the gas on the surface of the biphenyl hot box being sucked into the box through the exhaust pipe.

[0014] Optionally, a first bracket is fixedly installed on the left side of the box body, a first gas storage tank is fixedly installed on the bottom of the inner cavity of the first bracket, and helium is provided inside the first gas storage tank.

[0015] By adopting the above technical solution, this solution provides helium inside the first gas storage tank, fills the box with helium, and then sucks the air on the surface of the tested part through a vacuum pump, and observes the change of helium density within a certain period of time. If the density decreases, it means that there is a leakage.

[0016] Optionally, a first gas pipe is fixedly installed on the right side of the first gas storage tank, a right end of the first gas pipe is fixedly connected to the left side of the box, and a second electric valve is fixedly installed on the surface of the first gas pipe.

[0017] By adopting the above technical solution, the present solution provides a second electric valve, and the second electric valve is opened to allow the helium in the first gas storage tank to flow into the box body.

[0018] Optionally, a second bracket is fixedly installed on the right side of the box, a second gas tank is fixedly installed on the bottom of the inner cavity of the second bracket, a second gas pipe on the left side of the second gas tank is fixedly connected to the right side of the box, and a pump is fixedly installed on the surface of the second gas pipe.

[0019] By adopting the above technical solution, the present solution provides a second gas storage tank, and the pump is turned on to pump the gas inside the box into the second gas storage tank through the pump for storage.

[0020] Optionally, a leak detector is fixedly installed on the top of the box, a detection sensor is fixedly connected to the bottom of the leak detector, and the detection sensor is located inside the box.

[0021] By adopting the above technical solution, this solution sets up a leak detector, which detects the helium density inside the box through the detection sensor at the bottom, so as to accurately obtain the content of leaked helium.

[0022] In summary, the utility model includes at least one of the following beneficial effects: 1. By setting up the first purification mechanism and the second purification mechanism, when the vacuum pump is turned on, the gas on the surface of the detection part is extracted through the exhaust pipe, and the gas first passes through the first purification mechanism, and the moisture contained in the gas is adsorbed by the desiccant inside the first plug-in box, and then the gas passes through the second purification mechanism, and the impurities contained in the gas are adsorbed by the activated carbon inside the second plug-in box. Finally, the purified gas can be detected by the detector, so that when leak detection is performed on the biphenyl hot box, the extracted gas can be double-purified, thereby improving the accurate leak detection of the helium content, achieving the accuracy and work efficiency of helium leak detection, and having strong practicality.

[0023] 2. Helium is arranged inside the first gas tank. After the box is filled with helium, the surface air of the tested part is sucked in through a vacuum pump, and the change of helium density is observed within a certain period of time. If the density decreases, it means that there is a leakage. The second gas tank is arranged, and the pump is turned on to pump the gas inside the box into the second gas tank for storage. The density change of the leaked helium can be calculated through the sealing method, the detection data of the helium leak is improved, and the accurate helium leak is realized, which is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 It is a schematic diagram of the right side of the internal section of the first purification mechanism and the second purification mechanism of the utility model;

[0027] Figure 3 It is a schematic diagram of the left side of the internal section of the first purification mechanism and the second purification mechanism of the utility model;

[0028] Figure 4 It is a schematic diagram of the overall structure of the utility model.

[0029] Explanation of the reference numerals: 1. housing; 2. first shell; 3. first slot; 4. first socket; 5. first plug box; 6. sealing strip; 7. desiccant; 8. second shell; 9. second slot; 10. second socket; 11. second plug box; 12. activated carbon; 13. first electric valve; 14. vacuum pump; 15. exhaust pipe; 16. first bracket; 17. first gas storage tank; 18. first gas supply pipe; 19. second electric valve; 20. second bracket; 21. second gas storage tank; 22. exhaust pump; 23. leak detector; 24. detection sensor; 25. second gas supply pipe. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-4 The utility model is described in further detail.

[0031] Embodiment 1, refer to Figure 1-3 In this embodiment, in order to solve the problem that when the existing biphenyl hot box is used for helium leak detection, it is necessary to use a vacuum pump to suck the surface gas of the biphenyl hot box surface for detection, but the accuracy of helium detection is reduced due to the presence of many impurities and moisture in the gas, the utility model discloses a helium leak detection device for biphenyl hot box leak detection.

[0032] It comprises a box body 1, and a first purification mechanism and a second purification mechanism are arranged in sequence from bottom to top at the bottom of the box body 1;

[0033] The first purification mechanism includes a first shell 2, a first slot 3 is provided on the left inner wall of the inner cavity of the first shell 2, a first socket 4 is provided on the right side of the first shell 2, a first plug box 5 is provided on the surface of the first shell 2, sealing strips 6 are fixedly provided on the upper and lower sides of the inner wall of the first socket 4, the first plug box 5 is inserted into the inner cavity of the first shell 2 through the first socket 4 and the first slot 3, and a desiccant 7 is provided inside the first plug box 5;

[0034] The second purification mechanism includes a second shell 8, a second slot 9 is opened on the left inner wall of the inner cavity of the second shell 8, a second socket 10 is opened on the right side of the second shell 8, a second plug box 11 is arranged on the surface of the second shell 8, and sealing strips 6 are fixedly arranged on the upper and lower sides of the inner wall of the second socket 10. The second plug box 11 is inserted into the inner cavity of the second shell 8 through the second socket 10 and the second slot 9, and activated carbon 12 is arranged inside the second plug box 11.

[0035] A first electric valve 13 is fixedly installed at the bottom of the box body 1 . The bottom of the first electric valve 13 is fixedly connected to the top of the second shell 8 , and the inner cavity of the first electric valve 13 is communicated with the inner cavity of the box body 1 .

[0036] A vacuum pump 14 is fixedly installed at the bottom of the first housing 2 , and an exhaust pipe 15 is fixedly installed at the bottom of the vacuum pump 14 .

[0037] The specific working principle is: when the vacuum pump 14 is turned on, the gas on the surface of the detection part is extracted through the exhaust pipe 15, the gas first passes through the first purification mechanism, and the moisture contained in the gas is adsorbed by the desiccant 7 inside the first plug-in box 5, and then the gas passes through the second purification mechanism, and the impurities contained in the gas are adsorbed by the activated carbon 12 inside the second plug-in box 11. Finally, the purified gas can be detected by the detector. The staff can replace the internal desiccant 7 and activated carbon 12 by taking out the first plug-in box 5 and the second plug-in box 11, and the sealing strip 6 is set to ensure that the gas does not leak when passing through the first shell 2 and the second shell 8.

[0038] Example 2, refer to Figure 1 and 4 In order to solve the problem that the existing detection instrument for biphenyl hot box leak detection is not accurate in measuring helium data, based on the same concept as the above-mentioned embodiment 1, the helium leak detection device for biphenyl hot box leak detection also includes:

[0039] A first bracket 16 is fixedly installed on the left side of the box body 1 , and a first gas storage tank 17 is fixedly installed at the bottom of the inner cavity of the first bracket 16 , and helium is provided inside the first gas storage tank 17 .

[0040] A first gas pipe 18 is fixedly installed on the right side of the first gas storage tank 17 , the right end of the first gas pipe 18 is fixedly connected to the left side of the box body 1 , and a second electric valve 19 is fixedly installed on the surface of the first gas pipe 18 .

[0041] A second bracket 20 is fixedly installed on the right side of the box body 1, a second gas tank 21 is fixedly installed on the bottom of the inner cavity of the second bracket 20, a second gas pipe 25 on the left side of the second gas tank 21 is fixedly connected to the right side of the box body 1, and a pump 22 is fixedly installed on the surface of the second gas pipe 25.

[0042] A leak detector 23 is fixedly installed on the top of the box body 1 , and a detection sensor 24 is fixedly connected to the bottom of the leak detector 23 . The detection sensor 24 is located inside the box body 1 .

[0043] The specific working principle is: by setting helium inside the first gas tank 17, after the box body 1 is filled with helium, the surface air of the tested part is then sucked in by the vacuum pump 14, and the change of helium density is observed within a certain period of time. If the density is found to decrease, it means that there is a leakage phenomenon, and by setting the second gas tank 21, the pump 22 is turned on to pump the gas inside the box body 1 into the second gas tank 21 through the pump 22 for storage, and by setting the leak detector 23, the leak detector 23 detects the helium density inside the box body 1 through the detection sensor 24 at the bottom, so as to accurately obtain the content of leaked helium.

[0044] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A helium leak detection device for leak detection of a biphenyl hot box, comprising a box body (1), characterized in that: The bottom of the box (1) is provided with a first purification mechanism and a second purification mechanism in sequence from bottom to top; The first purification mechanism comprises a first shell (2), a first slot (3) is provided on the left inner wall of the inner cavity of the first shell (2), a first socket (4) is provided on the right side of the first shell (2), a first plug box (5) is provided on the surface of the first shell (2), sealing strips (6) are fixedly provided on the upper and lower sides of the inner wall of the first socket (4), the first plug box (5) is inserted into the inner cavity of the first shell (2) through the first socket (4) and the first slot (3), and a desiccant (7) is provided inside the first plug box (5); The second purification mechanism comprises a second shell (8), a second slot (9) is provided on the left inner wall of the inner cavity of the second shell (8), a second socket (10) is provided on the right side of the second shell (8), a second plug box (11) is provided on the surface of the second shell (8), sealing strips (6) are fixedly provided on the upper and lower sides of the inner wall of the second socket (10), the second plug box (11) is inserted into the inner cavity of the second shell (8) through the second socket (10) and the second slot (9), and activated carbon (12) is provided inside the second plug box (11).

2. A helium leak detection device for biphenyl hot box leak detection according to claim 1, characterized in that: A first electric valve (13) is fixedly mounted on the bottom of the box body (1); the bottom of the first electric valve (13) is fixedly connected to the top of the second shell (8); and the inner cavity of the first electric valve (13) is in communication with the inner cavity of the box body (1).

3. A helium leak detection device for biphenyl hot box leak detection according to claim 1, characterized in that: A vacuum pump (14) is fixedly mounted on the bottom of the first shell (2), and an exhaust pipe (15) is fixedly mounted on the bottom of the vacuum pump (14).

4. A helium leak detection device for biphenyl hot box leak detection according to claim 1, characterized in that: A first bracket (16) is fixedly mounted on the left side of the box body (1), a first gas storage tank (17) is fixedly mounted on the bottom of the inner cavity of the first bracket (16), and helium is provided inside the first gas storage tank (17).

5. A helium leak detection device for biphenyl hot box leak detection according to claim 4, characterized in that: A first gas pipe (18) is fixedly mounted on the right side of the first gas storage tank (17); the right end of the first gas pipe (18) is fixedly connected to the left side of the box body (1); and a second electric valve (19) is fixedly mounted on the surface of the first gas pipe (18).

6. A helium leak detection device for biphenyl hot box leak detection according to claim 1, characterized in that: A second bracket (20) is fixedly mounted on the right side of the box body (1), a second gas storage tank (21) is fixedly mounted on the bottom of the inner cavity of the second bracket (20), a second gas supply pipe (25) on the left side of the second gas supply tank (21) is fixedly connected to the right side of the box body (1), and a pump (22) is fixedly mounted on the surface of the second gas supply pipe (25).

7. A helium leak detection device for biphenyl hot box leak detection according to claim 1, characterized in that: A leak detector (23) is fixedly mounted on the top of the box (1), and a detection sensor (24) is fixedly connected to the bottom of the leak detector (23), wherein the detection sensor (24) is located inside the box (1).

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