Leakage detection device for vacuum system

Abstract

The utility model discloses a leak hunting device for a vacuum system. The leak hunting device comprises a vacuum pump station and a pump station leak hunting mechanism. The vacuum pump station is provided with a machine body, a base, a vacuum pump, a control panel and a vacuum pipe, the vacuum pump is fixed in the machine body and communicated with the outside through the vacuum pipe, and the control panel is used for controlling and displaying running states. The pump station leak detection mechanism is embedded and fixed on the rear side of the vacuum pump station, a test box is in butt joint with a rear port of a machine body, a super-hydrophobic membrane layer is arranged on the rear side of an inner cavity of the test box, a partition plate is arranged on the front side, and a supporting plate is fixed on the top of the partition plate and connected with an infrared liquid level sensor. When the vacuum pump station leaks, purified water penetrates through the super-hydrophobic membrane layer to enter the front side area of the inner cavity of the test box due to the internal and external pressure difference, and the infrared liquid level sensor detects the liquid level change and sends out a signal to prompt an operator to deal with the liquid level change. The device is compact in structure and simple and convenient to operate, can timely and effectively detect leakage of the vacuum pump station, guarantees stable operation of a vacuum system, and reduces maintenance cost and production risks.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pump station leakage detection technology, specifically to a leak detection device for vacuum systems. Background Technology

[0002] In vacuum system applications, leakage has always been a key factor affecting system performance and stability. Vacuum systems are widely used in industrial production, scientific research experiments, and other fields, requiring high vacuum levels. Leaks not only prevent the system from achieving the expected vacuum level but can also affect product quality and experimental results. Traditional vacuum system leak detection methods have certain limitations. For example, some methods are complex to operate, requiring specialized personnel and having low detection efficiency; others lack sensitivity and are unable to detect minute leaks. Furthermore, some detection methods may interfere with or damage the vacuum system, affecting its normal operation.

[0003] To address these issues, a more efficient, sensitive leak detection device with minimal impact on the vacuum system is needed. This technical solution provides a leak detection device for vacuum systems. By embedding a fixed leak detection mechanism behind the vacuum pump station, and utilizing components such as a superhydrophobic film and an infrared liquid level sensor, the device achieves rapid and accurate detection of leaks in the vacuum pump station. Utility Model Content

[0004] The purpose of this utility model is to provide a technical solution for a leak detection device for a vacuum system, thereby addressing the shortcomings mentioned in the background art. To overcome the drawbacks and defects described in the background art, this technical solution includes the following:

[0005] It includes a vacuum pump station, on the rear side wall of which a pump station leak detection mechanism is embedded and fixed; the vacuum pump station includes a body, a base fixed to the bottom end face of the body, and a vacuum pump fixedly connected to the top surface of the base inside the body, and a control panel fixedly connected to the top surface of the body, and the vacuum delivery end of the vacuum pump is connected to several vacuum tubes that penetrate to the outside of the body.

[0006] The pump station leak detection mechanism includes a test box fixedly connected to the rear port of the machine, a superhydrophobic film layer fixedly connected to the rear side of the inner cavity of the test box, and a partition fixedly connected to the front side of the inner cavity of the test box. A support plate is fixedly connected to the top surface of the partition.

[0007] As a preferred embodiment of this utility model, the rear end face of the body has a notch that communicates with the inner cavity of the test chamber.

[0008] As a preferred embodiment of this utility model, the top end face of the body and the bottom end face of the control panel, as well as the bottom end face of the body and the top end face of the base, are all fixed by screws and sealant.

[0009] As a preferred embodiment of this utility model: a pump station controller is installed on the inner cavity side wall of the machine body, and wheels are installed at the four corners of the bottom surface of the base.

[0010] As a preferred embodiment of this utility model: several through holes are provided on the side wall of the machine body for the vacuum tube to pass through, and a sealing ring is fixed inside each through hole.

[0011] As a preferred embodiment of this utility model: the front end face of the test box has an opening that connects to the rear port of the machine, and the bottom surface of the test box is fixedly connected to the rear side of the top surface of the base.

[0012] As a preferred embodiment of this utility model: the superhydrophobic film layer divides the inner cavity of the test chamber into two parts, front and back. Pure water is placed in the rear part of the inner cavity of the test chamber, and the hydrophobic surface of the superhydrophobic film layer faces the rear part of the inner cavity of the test chamber. When a pressure difference is generated due to a leak in the vacuum pump station, the pure water is forced to pass through the superhydrophobic film layer and enter the front part of the inner cavity of the test chamber.

[0013] As a preferred embodiment of this utility model: the height of the partition is 1 / 2 of the overall height of the test chamber, and there is an opening between the top surface of the partition and the bottom of the inner cavity of the test chamber for the gas inside the vacuum pump station to communicate with the front area of ​​the inner cavity of the test chamber.

[0014] As a preferred embodiment of this utility model: the top surface of the test box is provided with a water inlet, and a water inlet valve is installed inside the water inlet.

[0015] As a preferred embodiment of this utility model: a support plate is fixedly connected to the rear side of the top surface of the partition, and the rear side of the bottom surface of the support plate is fixedly connected to the side wall of the infrared liquid level sensor. The detection end of the infrared liquid level sensor faces the bottom side wall of the inner cavity of the test chamber, and is used to monitor whether pure water passes through the superhydrophobic film layer and enters the front area of ​​the inner cavity of the test chamber.

[0016] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0017] The leak detection mechanism is integrated into the rear of the vacuum pump station, featuring a compact structure and convenient installation without occupying excessive space. Utilizing the properties of a superhydrophobic film, when a pressure differential is generated due to a leak in the vacuum pump station, pure water is forced through the film into a specific area. Combined with an infrared level sensor, it can promptly detect changes in liquid level and send signals, achieving rapid and effective leak monitoring. The connections between the unit body and base, control panel, etc., are sealed, and sealing rings are installed at the vacuum tube penetration points to effectively prevent gas leakage and ensure stable operation of the vacuum system. The test chamber can be replenished with pure water for long-term use. The overall design balances monitoring sensitivity and system stability, enabling timely detection of vacuum pump station leaks and preventing performance degradation or damage to the vacuum system due to leaks, thus reducing maintenance costs and production risks. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the vacuum pump station;

[0020] Figure 2 This is a schematic diagram of the internal structure of a vacuum pump station;

[0021] Figure 3 This is a schematic diagram of the leak detection mechanism for the pump station.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Vacuum pump station; 11. Body; 12. Base; 13. Vacuum pump; 14. Pump station controller; 15. Control panel; 16. Vacuum tube; 17. Wheel; 2. Pump station leak detection mechanism; 21. Test chamber; 22. Water inlet; 23. Water inlet valve; 24. Support plate; 25. Partition plate; 26. Infrared liquid level sensor; 27. Superhydrophobic film layer. Detailed Implementation

[0024] To provide a clearer explanation and illustration of the technical solution and implementation of this utility model, several preferred specific embodiments for implementing the technical solution of this utility model are introduced below. The following description is merely exemplary and not intended to limit the scope, application, or use of this disclosure. It should be understood that in all these drawings, the same or similar reference numerals indicate the same or similar parts and features. The various drawings only schematically illustrate the concept and principles of the embodiments of this disclosure and do not necessarily show the specific dimensions and scale of each embodiment. Specific parts in particular drawings may be exaggerated to illustrate relevant details or structures of the embodiments of this disclosure. The disclosures of various publications, patents, and published patent specifications cited herein are incorporated herein by reference in their entirety. The technical solution of this utility model will be clearly and completely described below in conjunction with embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model.

[0025] Example 1: This example provides a leak detection device for a vacuum system, including a vacuum pump station 1 and a pump station leak detection mechanism 2. In the vacuum pump station 1, the body 11 is fixedly connected to the base 12 by screws and sealant. The vacuum pump 13 is installed inside the body 11 and fixed to the base 12. The control panel 15 is fixed to the top of the body 11 by screws and sealant. Multiple through holes are opened on the side wall of the body 11. The vacuum tube 16 passes through the through holes and is sealed by a sealing ring. The pump station controller 14 is installed on the inner side wall of the body 11. Wheels 17 are installed at the four corners of the bottom of the base 12. In the pump station leak detection mechanism 2, the front opening of the test chamber 21 is connected to the rear port of the body 11 and fixed to the top rear side of the base 12 by screws. A water inlet 22 is opened on the top of the test chamber 21 and a water inlet valve 23 is installed. A partition 25 is fixed to the front side of the inner cavity of the test chamber 21, with a height of 1 / 2 of the overall height of the test chamber 21. Openings are provided at the top and bottom of the inner cavity of the test chamber 21. A support plate 24 is fixed to the rear side of the top of the partition 25. An infrared liquid level sensor 26 is fixed to the rear side of the bottom of the support plate 24, with its detection end facing the bottom of the inner cavity of the test chamber 21. A superhydrophobic film layer 27 is fixed to the rear side of the inner cavity of the test chamber 21, with its hydrophobic surface facing the rear. The rear part of the test chamber 21 is filled with pure water. When a leak occurs in the vacuum pump station 1, the internal and external pressure difference causes pure water to pass through the superhydrophobic film layer 27 and enter the front area. The infrared liquid level sensor 26 detects the liquid level change and sends a signal.

[0026] Example 2: The leak detection device in this example has a structure that is basically the same as that in Example 1, except for the installation method of the pump station leak detection mechanism 2. The test box 21 is fixedly connected to the rear port of the body 11 by welding. The water inlet 22 adopts a threaded interface design for easy connection to an external water source. The infrared liquid level sensor 26 is fixed to the bottom of the support plate 24 by a snap-fit ​​structure for easy disassembly and maintenance. The superhydrophobic film layer 27 is detachably installed and fixed to the rear of the inner cavity of the test box 21 by a pressure plate for easy replacement. When the vacuum pump station 1 leaks, pure water passes through the superhydrophobic film layer 27 into the front area. After the infrared liquid level sensor 26 detects the change in liquid level, it transmits the signal wirelessly to the control panel 15 to realize remote alarm.

[0027] Example 3: The leak detection device in this example adds redundant design based on Example 1. In the vacuum pump station 1, a rubber shock-absorbing pad is added between the body 11 and the base 12 to reduce the impact of vibration. The vacuum tube 16 adopts a double-layer sealing structure, with an outer layer of metal corrugated pipe and an inner layer of rubber sealing pipe to improve sealing performance. In the pump station leak detection mechanism 2, a spare partition 25 is added to the front side of the inner cavity of the test chamber 21, arranged parallel to the main partition to form double-layer protection. The superhydrophobic film layer 27 adopts a double-layer superimposed design to improve the anti-permeation ability. The infrared liquid level sensor 26 adds redundant detection points, which are respectively arranged at the top and middle of the front side of the inner cavity of the test chamber 21 to improve detection reliability. When a leak occurs in the vacuum pump station 1, pure water must simultaneously break through the double-layer superhydrophobic film layer 27 and trigger both infrared liquid level sensors 26 to issue an alarm signal, reducing the false alarm rate.

[0028] Example 4: The leak detection device in this example is optimized for special operating conditions. In vacuum pump station 1, the body 11 is made of explosion-proof material, and the control panel 15 is equipped with an explosion-proof shell, making it suitable for flammable and explosive environments. The vacuum tube 16 is made of corrosion-resistant material with an antistatic coating. In the pump station leak detection mechanism 2, the test chamber 21 is designed to be explosion-proof, and the inlet 22 is equipped with an explosion-proof valve to prevent external ignition sources from entering. The superhydrophobic film layer 27 is made of high-temperature resistant material, which can maintain hydrophobic properties in high-temperature environments. The infrared liquid level sensor 26 is equipped with explosion-proof certification, and the detection end is equipped with a protective cover to prevent direct contact with liquid. When vacuum pump station 1 leaks in a high-temperature and explosive environment, pure water enters the front area through the superhydrophobic film layer 27, and the infrared liquid level sensor 26 transmits the alarm signal to the control panel 15 in the safe area through the explosion-proof signal line.

[0029] Based on the above preferred technical solution, the workflow of this technical solution is described as follows:

[0030] When the leak detection device for the vacuum system starts working, vacuum pump station 1 starts first. Vacuum pump 13 runs inside the body 11, connecting to the external vacuum system through vacuum pipe 16 and extracting gas to bring the system to the required vacuum level. During this process, control panel 15 displays the operating status and parameters of vacuum pump station 1 in real time. Operators can adjust parameters such as the start / stop and operating speed of vacuum pump 13 through control panel 15. At the same time, pump station controller 14 automatically controls and monitors the operation of vacuum pump 13 on the inner wall of body 11. During normal operation, the pump station leak detection mechanism 2 is in standby monitoring state. The front opening of the test box 21 is connected to the rear port of the body 11. The rear side of the inner cavity of the test box 21 is filled with pure water. The superhydrophobic film layer 27 divides the inner cavity of the test box 21 into front and rear parts, with its hydrophobic surface facing the pure water on the rear side. The partition 25 is fixed to the front side of the inner cavity of the test box 21, with openings at the top and bottom of the inner cavity of the test box 21. The support plate 24 is fixed to the rear side of the top of the partition 25. The infrared liquid level sensor 26 is fixed to the rear side of the bottom of the support plate 24 with its detection end facing the bottom of the inner cavity of the test box 21.

[0031] If vacuum pump station 1 leaks, internal gas enters the front area of ​​the inner cavity of test chamber 21 through the gap between the rear end face of the body 11 and the inner cavity of test chamber 21. This causes a pressure difference between the front area and the pure water area at the rear of the inner cavity of test chamber 21. Under the action of the pressure difference, pure water is forced to pass through the hydrophobic surface of the superhydrophobic film layer 27 into the front area of ​​the inner cavity of test chamber 21. As pure water enters, the liquid level in the front area of ​​the inner cavity of test chamber 21 gradually rises. When the liquid level rises to the detection range of infrared liquid level sensor 26, infrared liquid level sensor 26 detects the liquid level change and transmits the signal to control panel 15. After receiving the signal, control panel 15 displays a leak alarm message, prompting the operator that vacuum pump station 1 has leaked. The operator can then check the leak through test chamber 21. 1. The water inlet 22 and water inlet valve 23 on the top surface replenish pure water to the rear side of the inner cavity of the test chamber 21 to maintain the normal operation of the leak detection device. When replenishing pure water, open the water inlet valve 23 and inject pure water into the rear side of the inner cavity of the test chamber 21 through the water inlet 22 until the liquid level reaches a suitable height, and then close the water inlet valve 23. If it is necessary to maintain or replace parts of the leak detection device, such as replacing the superhydrophobic film layer 27 or repairing the infrared liquid level sensor 26, the operator can first shut down the vacuum pump station 1. After the system pressure returns to atmospheric pressure, disassemble the connecting parts between the test chamber 21 and the body 11, take out the test chamber 21 and perform the corresponding operation. After completing the maintenance or replacement, reinstall the test chamber 21 and start the vacuum pump station 1 to restore the leak detection device to working status.

[0032] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A leak detection device for a vacuum system, comprising a vacuum pump station (1), characterized in that: A pump station leak detection mechanism (2) is embedded and fixed on the rear side wall of the vacuum pump station (1); The vacuum pump station (1) includes a body (11), a base (12) fixed to the bottom end face of the body (11), and a vacuum pump (13) fixedly connected to the top surface of the base (12) inside the body (11). A control panel (15) is fixedly connected to the top surface of the body (11). The vacuum delivery end of the vacuum pump (13) is connected to several vacuum tubes (16) that penetrate to the outside of the body (11). The pump station leak detection mechanism (2) includes a test box (21) fixedly connected to the rear port of the body (11), a superhydrophobic film layer (27) fixedly connected to the rear side of the inner cavity of the test box (21), and a partition (25) fixedly connected to the front side of the inner cavity of the test box (21). A support plate (24) is fixedly connected to the top surface of the partition (25).

2. The leak detection device for a vacuum system according to claim 1, characterized in that: The rear end face of the fuselage (11) has a notch that communicates with the inner cavity of the test box (21).

3. The leak detection device for a vacuum system according to claim 1, characterized in that: The top end face of the body (11) and the bottom end face of the control panel (15), as well as the bottom end face of the body (11) and the top end face of the base (12), are all fixed with screws and sealant.

4. The leak detection device for a vacuum system according to claim 1, characterized in that: A pump station controller (14) is installed on the inner wall of the body (11), and wheels (17) are installed at the four corners of the bottom surface of the base (12).

5. The leak detection device for a vacuum system according to claim 1, characterized in that: The side wall of the fuselage (11) has several through holes for the vacuum tube (16) to pass through, and each through hole is fixed with a sealing ring.

6. The leak detection device for a vacuum system according to claim 1, characterized in that: The front end face of the test box (21) has an opening that connects to the rear port of the body (11), and the bottom surface of the test box (21) is fixedly connected to the rear side of the top surface of the base (12).

7. The leak detection device for a vacuum system according to claim 1, characterized in that: The superhydrophobic film layer (27) divides the inner cavity of the test chamber (21) into two parts, front and back. Pure water is placed in the rear part of the inner cavity of the test chamber (21), and the hydrophobic surface of the superhydrophobic film layer (27) faces the rear part of the inner cavity of the test chamber (21). When a pressure difference is generated due to a leak in the vacuum pump station (1), the pure water is forced to pass through the superhydrophobic film layer (27) and enter the front part of the inner cavity of the test chamber (21).

8. The leak detection device for a vacuum system according to claim 1, characterized in that: The height of the partition (25) is 1 / 2 of the overall height of the test chamber (21), and there is an opening between the top surface of the partition (25) and the bottom of the inner cavity of the test chamber (21) for the gas inside the vacuum pump station (1) to communicate with the front area of ​​the inner cavity of the test chamber (21).

9. The leak detection device for a vacuum system according to claim 1, characterized in that: The test chamber (21) has a water inlet (22) on its top surface, and a water inlet valve (23) is installed inside the water inlet (22).

10. The leak detection device for a vacuum system according to claim 1, characterized in that: A support plate (24) is fixedly connected to the rear side of the top surface of the partition (25), and the rear side of the bottom surface of the support plate (24) is fixedly connected to the side wall of the infrared liquid level sensor (26). The detection end of the infrared liquid level sensor (26) faces the bottom side wall of the inner cavity of the test chamber (21) and is used to monitor whether pure water enters the front area of ​​the inner cavity of the test chamber (21) through the superhydrophobic film layer (27).

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