Sealing mechanism of helium detection vacuum box

Abstract

The utility model relates to the technical field of helium detection vacuum boxes, and discloses a sealing mechanism of a helium detection vacuum box, which comprises a vacuum box body, a helium detection component is arranged in the vacuum box body, the inner wall of the vacuum box body is fixedly connected with the surface of an air suction pipe, and the rear end of the air suction pipe is fixedly connected with the front end of an air suction pump. The rear end of the inner wall of the vacuum box body is fixedly connected with the rear ends of a plurality of fans. According to the utility model, an operator firstly checks whether each part of the helium detection vacuum box is normal or not, for example, whether the double-box door is well sealed or not and whether the getter pump and the fan can work normally or not, then opens the double-box door, places an article needing helium detection at a proper position in the vacuum box body and closes the box door, and finally, the vacuum box is closed. Working parameters of the aspirator pump, such as the air suction speed and the finally-achieved vacuum degree, are set through the control panel, and meanwhile parameters such as the alarm threshold value of the air pressure sensor are set.

Description

Technical Field

[0001] This utility model relates to the field of helium detection vacuum chamber technology, and in particular to a sealing mechanism for a helium detection vacuum chamber. Background Technology

[0002] In industrial production and scientific research, it is often necessary to conduct leak tests on various components and products to ensure that no leaks occur during use. Helium detection, as a high-precision leak detection method, is widely used in aerospace, automotive manufacturing, electronic equipment, and other fields. The helium detection vacuum chamber, as a key piece of equipment in the helium detection process, directly affects the accuracy and efficiency of the test results. With the continuous development of industry and technological advancements, higher requirements are being placed on the sealing performance, detection accuracy, and ease of operation of helium detection vacuum chambers.

[0003] Some existing helium vacuum chamber sealing mechanisms may have sealing problems, leading to helium leakage during the testing process and affecting the accuracy of the test results. In addition, the gas pressure detection system of some existing devices is not accurate enough to accurately measure minute pressure changes. For some products with extremely high sealing requirements, it may be unable to detect minute leaks. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a sealing mechanism for a helium detection vacuum chamber.

[0005] This utility model is achieved by the following technical solution: a sealing mechanism for a helium detection vacuum chamber, including a vacuum chamber body, a helium detection component is provided inside the vacuum chamber body, the inner wall of the vacuum chamber body is fixedly connected to the surface of the suction pipe, the rear end of the suction pipe is fixedly connected to the front end of the suction pump, the rear end of the inner wall of the vacuum chamber body is fixedly connected to the rear end of the fan, and a plurality of fans are provided.

[0006] Through the above technical solution, the vacuum chamber body provides a sealed space for helium detection operations, ensuring that helium does not leak during the detection process and guaranteeing the accuracy of the detection results. The suction pipe delivers the gas in the vacuum chamber to the suction pump, which is responsible for extracting the air from the chamber to create a vacuum environment suitable for helium detection, thereby improving the sensitivity and accuracy of the detection. After the detection is completed, the fan can accelerate the circulation of gas in the chamber, allowing the gas pressure inside the chamber to quickly return to normal levels. At the same time, it can also expel impurities or residual gases generated during the detection process from the chamber, facilitating the next detection.

[0007] As a further improvement to the above solution, the front end of the vacuum box body is fixedly connected to the rear end of the notice board.

[0008] Through the above technical solution, the notice board can be used to post information related to helium testing operations, such as operating procedures, precautions, and testing standards, so that operators can quickly understand and master the testing requirements and improve work efficiency.

[0009] As a further improvement to the above solution, the front end of the vacuum chamber body is hinged to the rear end of the double-opening chamber door, the front end of the double-opening chamber door is fixedly connected to the rear end of the handle, and an observation window is provided at the front end of the double-opening chamber door, with two observation windows provided.

[0010] The above technical solution allows for convenient operation inside the vacuum chamber, while the observation window allows operators to observe the testing situation inside the chamber without opening the door, reducing the risk of helium leakage and avoiding interference with the testing environment caused by frequent door opening.

[0011] As a further improvement to the above solution, the front end of the vacuum chamber body is fixedly connected to the rear end of the control panel, and the top end of the control panel is fixedly connected to the bottom end of the warning light.

[0012] The control panel, based on the above technical solution, controls the entire helium detection process, including setting the operating parameters of the suction pump and starting or stopping the detection. It is simple and convenient to operate. Warning lights illuminate when abnormalities occur during the detection process, promptly alerting operators to take appropriate measures to ensure the safety of the detection process.

[0013] As a further improvement to the above solution, the top of the inner wall of the vacuum chamber is fixedly connected to the top of the pressure sensor.

[0014] Based on the above technical solution and the specific application scenarios and requirements of the helium detection vacuum chamber, a single-crystal silicon pressure sensor is selected as the pressure sensor. Single-crystal silicon pressure sensors offer advantages such as high measurement accuracy, resistance to static pressure, good sensitivity, and strong stability. They maintain stable performance under different temperature and pressure conditions, effectively improving the accuracy and reliability of helium detection. Furthermore, the fast response speed of the single-crystal silicon pressure sensor allows for rapid and accurate detection of pressure changes, meeting the real-time pressure monitoring requirements during helium detection. In addition, the single-crystal silicon pressure sensor also possesses excellent anti-interference capabilities, enabling it to operate normally in complex electromagnetic environments and reducing the impact of external interference on the detection results.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention features a double-door design hinged to the rear end of the vacuum chamber body, facilitating operation inside the chamber. For example, when placing or removing items to be tested, the double-door provides a larger opening, making it easier to handle large or irregularly shaped components. Furthermore, compared to a single door, the double-door requires less space to open and close, offering a significant advantage in space-constrained work environments.

[0017] The two observation windows at the front of the double-door chamber allow operators to observe the helium testing process inside the vacuum chamber without opening the door. This not only facilitates real-time monitoring of the testing process but also reduces the risk of helium leakage and avoids interference with the testing environment caused by frequent door openings.

[0018] The notice board fixed to the front of the vacuum chamber can be used to post information related to helium testing operations, such as operating procedures, precautions, and testing standards. This helps improve operator efficiency and reduce errors caused by improper operation.

[0019] This invention connects the vacuum chamber to a suction pump via a suction pipe. The suction pump extracts air from the vacuum chamber, creating a suitable vacuum environment for helium detection. Through the suction pipe, the suction pump efficiently extracts gas from the chamber, ensuring the accuracy of the helium detection process.

[0020] A pressure sensor located at the top of the inner wall of the vacuum chamber monitors the pressure inside the chamber in real time. Precise pressure control is crucial during helium testing. The pressure sensor feeds pressure information back to the control system, allowing for timely adjustments to the suction pump to maintain the chamber pressure at an appropriate level, thereby improving the accuracy and reliability of helium testing.

[0021] This invention features a control panel fixed to the front of the vacuum chamber body, allowing operators to easily control the entire helium testing process, such as setting the operating parameters of the suction pump and starting or stopping the test. A warning light located at the top of the control panel illuminates when any abnormality occurs during testing, such as abnormal gas pressure or helium leakage, promptly alerting the operator to take appropriate measures to ensure the safety of the testing process.

[0022] Several fans are fixed to the rear end of the inner wall of the vacuum chamber. After the helium detection process is completed, the fans can accelerate the circulation of gas inside the chamber, which helps to quickly restore the normal gas pressure inside the chamber. At the same time, they can also remove some impurities or residual gases that may have been generated during the detection process, so as to facilitate the next detection. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the left end structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the bottom structure of this utility model;

[0026] Figure 4 This is a schematic diagram of the internal structure of this utility model;

[0027] Figure 5 This is a cross-sectional structural diagram of the present invention.

[0028] Explanation of key symbols:

[0029] 1. Vacuum chamber body; 2. Notification board; 3. Double doors; 4. Observation window; 5. Handle; 6. Control panel; 7. Warning light; 8. Suction pipe; 9. Suction pump; 10. Fan; 11. Pressure sensor. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0031] Example:

[0032] Please combine Figure 1-5 The sealing mechanism of a helium detection vacuum chamber according to this embodiment includes a vacuum chamber body 1, a helium detection component is provided inside the vacuum chamber body 1, the inner wall of the vacuum chamber body 1 is fixedly connected to the surface of the suction pipe 8, the rear end of the suction pipe 8 is fixedly connected to the front end of the suction pump 9, the rear end of the inner wall of the vacuum chamber body 1 is fixedly connected to the rear end of the fan 10, and a plurality of fans 10 are provided.

[0033] The front end of the vacuum chamber body 1 is fixedly connected to the rear end of the notice board 2.

[0034] The front end of the vacuum chamber body 1 is hinged to the rear end of the double-opening chamber door 3, and the front end of the double-opening chamber door 3 is fixedly connected to the rear end of the handle 5.

[0035] The double-door box 3 has two observation windows 4 at its front end.

[0036] The front end of the vacuum chamber body 1 is fixedly connected to the rear end of the control panel 6, and the top of the control panel 6 is fixedly connected to the bottom end of the warning light 7.

[0037] The top of the inner wall of the vacuum chamber body 1 is fixedly connected to the top of the air pressure sensor 11.

[0038] The implementation principle of the sealing mechanism of the helium detection vacuum chamber in this embodiment is as follows: The operator first checks whether each component of the helium detection vacuum chamber is normal, such as whether the double-door 3 is well sealed, and whether the suction pump 9 and fan 10 are working properly. Then, the operator opens the double-door 3, places the item to be helium detected in a suitable position inside the vacuum chamber body 1, closes the door, and sets the operating parameters of the suction pump 9 through the control panel 6, such as the suction speed and the final vacuum level to be achieved. At the same time, the operator sets the alarm threshold of the pressure sensor 11 and other parameters. The suction pump 9 is then started, and it extracts air from the vacuum chamber body 1 through the suction pipe 8. As air is continuously extracted, the air pressure inside the chamber gradually decreases. The pressure sensor 11 monitors the air pressure inside the chamber in real time and feeds the air pressure information back to the control system. When the air pressure inside the chamber reaches the preset value... When the vacuum level is reached, the suction pump 9 stops working or maintains the current pumping state according to the instructions of the control system. After a suitable vacuum environment is reached, the helium detection component is activated to perform helium detection on the items inside the chamber. The helium detection component injects helium into the chamber and detects whether there is helium leakage or other issues. During this process, the operator can observe the situation inside the chamber through the observation window 4. If any abnormality occurs, such as a sudden change in air pressure exceeding the set threshold, the warning light 7 will illuminate to remind the operator. After the helium detection process is completed, the fan 10 is activated. The fan 10 accelerates the circulation of gas inside the chamber, gradually restoring the air pressure inside the chamber to a normal level. At the same time, the fan 10 can expel any residual helium, impurities, etc. from the chamber. The operator records the helium detection results, then opens the double-door chamber 3 and takes out the tested items. The entire helium detection process is then complete.

[0039] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A sealing mechanism for a helium detection vacuum chamber, characterized in that, The vacuum chamber includes a vacuum chamber body (1), which is equipped with a helium detection component. The inner wall of the vacuum chamber body (1) is fixedly connected to the surface of the suction pipe (8). The rear end of the suction pipe (8) is fixedly connected to the front end of the suction pump (9). The rear end of the inner wall of the vacuum chamber body (1) is fixedly connected to the rear end of the fan (10). Several fans (10) are provided.

2. The sealing mechanism of a helium detection vacuum chamber as described in claim 1, characterized in that: The front end of the vacuum box body (1) is fixedly connected to the rear end of the notice board (2).

3. The sealing mechanism of a helium detection vacuum chamber as described in claim 1, characterized in that: The front end of the vacuum chamber body (1) is hinged to the rear end of the double-opening chamber door (3), and the front end of the double-opening chamber door (3) is fixedly connected to the rear end of the handle (5).

4. The sealing mechanism of a helium detection vacuum chamber as described in claim 3, characterized in that: The double-opening box door (3) has an observation window (4) at its front end, and there are two observation windows (4).

5. The sealing mechanism of a helium detection vacuum chamber as described in claim 1, characterized in that: The front end of the vacuum chamber body (1) is fixedly connected to the rear end of the control panel (6), and the top end of the control panel (6) is fixedly connected to the bottom end of the warning light (7).

6. The sealing mechanism of a helium detection vacuum chamber as described in claim 1, characterized in that: The top of the inner wall of the vacuum chamber body (1) is fixedly connected to the top of the air pressure sensor (11).

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