Nitrogen filling control pressure maintaining device

Abstract

The utility model discloses nitrogen gas filling control pressure maintaining equipment, include: purifying mechanism, install the top of installation platform board, purifying mechanism is connected with first air inlet pipeline, is used for purifying the medium of first air inlet pipeline delivery, second delivery pipeline, install the top of installation platform board, second delivery pipeline is connected with purifying mechanism, is used for the medium delivery after purifying mechanism purifying, exhaust mechanism, install the top of installation platform board, and are connected with second delivery pipeline, are used for realizing the orderly exhaust of second delivery pipeline in -test gas or mixed medium, the utility model discloses through purifying mechanism realizes the dehydration of gas source, removes oil, pressure stabilization, lubrication and sterile depth purification, provides clean stable medium basis for pressure maintaining test, effectively avoids the damage of impurity to pipeline and measured product, promotes test accuracy.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, specifically to a nitrogen filling control and pressure holding device. Background Technology

[0002] In precision electronics manufacturing, the pressure holding performance of sealed components is directly related to product reliability and safety. Nitrogen filling pressure holding test is the core method for verifying sealing performance.

[0003] Existing pressure holding test equipment generally suffers from incomplete air source purification. Impurities such as moisture, oil, and microorganisms in the air can easily contaminate or wear down the test pipeline and the tested product, affecting test accuracy and product lifespan. In addition, existing equipment lacks a dedicated pipeline flushing mechanism, and residual media in the pipeline after long-term use can easily cause cross-contamination. Furthermore, pipeline maintenance is cumbersome. Therefore, we need to propose a nitrogen-filled pressure holding control device. Utility Model Content

[0004] The purpose of this invention is to provide a nitrogen filling control and pressure holding device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A nitrogen filling and pressure holding device includes: a mounting platform plate with a first air inlet pipe fixedly mounted on its top, the first air inlet pipe being equipped with a first pneumatic ball valve; a purification mechanism mounted on the top of the mounting platform plate, the purification mechanism being connected to the first air inlet pipe for purifying the medium transported by the first air inlet pipe; a second conveying pipe mounted on the top of the mounting platform plate, the second conveying pipe being connected to the purification mechanism for conveying the purified medium; a nitrogen conveying mechanism mounted on the top of the mounting platform plate and connected to the second conveying pipe for conveying nitrogen into the second conveying pipe; and a discharge mechanism mounted on the top of the mounting platform plate and connected to the second conveying pipe for the orderly discharge of the tested gas or mixed medium from the second conveying pipe.

[0006] Preferably, the purification mechanism includes a pneumatic three-way actuator, a first delivery pipe, and a sterilization filter; The pneumatic three-source component is fixedly installed on the side of the mounting platform plate, and the sterilization filter is fixedly installed on the top of the mounting platform plate. The first conveying pipe connects the inlet end and the outlet end of the pneumatic three-source component. The first conveying pipe at the inlet end of the pneumatic three-source component is connected to the first air inlet pipe. The first conveying pipe at the outlet end of the pneumatic three-source component is connected to the inlet end of the sterilization filter. The outlet end of the sterilization filter is connected to the second conveying pipe.

[0007] Preferably, the nitrogen delivery mechanism includes a second pneumatic ball valve, a second air inlet pipe, and a first delivery flexible tube; The second air intake pipe is fixedly installed on the top of the mounting platform plate, the second pneumatic ball valve is installed on the second air intake pipe, the first conveying flexible tube is connected to the end of the second air intake pipe, and the first conveying flexible tube is connected to the second conveying pipe.

[0008] Preferably, the discharge mechanism includes a second conveying flexible channel, a first electro-proportional valve, a third pneumatic ball valve, a first pressure transmitter, a first air outlet pipe, a third conveying flexible channel, a second electro-proportional valve, a second air outlet pipe, a second pressure transmitter, and a fourth pneumatic ball valve. The first and second air outlet pipes are both fixedly installed on the top of the mounting platform plate. The first electro-proportional valve, the third pneumatic ball valve and the first pressure transmitter are all installed on the first air outlet pipe. The first air outlet pipe is connected to the first electro-proportional valve, and the second conveying soft tube is connected to the second conveying pipe. The second electro-proportional valve, the second pressure transmitter, and the fourth pneumatic ball valve are all installed on the second air outlet pipe. The third conveying flexible tube is connected to the second air outlet pipe, and the third conveying flexible tube is connected to the second conveying pipe.

[0009] Preferably, a third air inlet pipe and a third air outlet pipe are fixedly installed on the top of the mounting platform plate. The end of the third air inlet pipe is connected to a return pipe, which is connected to the third air outlet pipe. A fifth pneumatic ball valve is installed on the third air inlet pipe, and a sixth pneumatic ball valve is installed on the third air outlet pipe.

[0010] Preferably, a water tank is fixedly installed on the top of the mounting platform plate, and a third conveying pipe is connected to the return pipe, with one end of the third conveying pipe located above the water tank.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model achieves deep purification of the gas source through a purification mechanism, including dehydration, oil removal, pressure stabilization, lubrication, and sterilization, providing a clean and stable medium for pressure holding tests, effectively avoiding damage to pipelines and tested products by impurities, and improving test accuracy. 2. This utility model, through the design of a third air inlet pipe, a return pipe, a third air outlet pipe, and a third delivery pipe, can conveniently complete the flushing and cleaning of the pipeline, prevent cross-contamination, and reduce maintenance costs. Attached Figure Description

[0012] Figure 1 This is one of the structural schematic diagrams of this utility model; Figure 2 This is the second structural schematic diagram of the present invention; Figure 3 This is a partial structural schematic diagram of the present invention.

[0013] In the diagram: 1. Mounting platform plate; 2. First air inlet pipe; 3. First pneumatic ball valve; 4. Second pneumatic ball valve; 5. Pneumatic three-way power supply; 6. First conveying pipe; 7. Sterilization filter; 8. Second air inlet pipe; 9. First conveying flexible channel; 10. Second conveying pipe; 11. Second conveying flexible channel; 12. First electro-proportional valve; 13. Third pneumatic ball valve; 14. First pressure transmitter; 15. First air outlet pipe; 16. Third conveying flexible channel; 17. Second electro-proportional valve; 18. Second air outlet pipe; 19. Second pressure transmitter; 20. Fourth pneumatic ball valve; 21. Third air inlet pipe; 22. Fifth pneumatic ball valve; 23. Return pipe; 24. Third air outlet pipe; 25. Sixth pneumatic ball valve; 26. Third conveying pipe; 27. Water tank. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-3 This utility model provides a technical solution: The nitrogen filling and pressure holding equipment includes: a mounting platform plate 1, on which a first air inlet pipe 2 is fixedly mounted, and a first pneumatic ball valve 3 is provided on the first air inlet pipe 2; and a purification mechanism, which is installed on the top of the mounting platform plate 1 and connected to the first air inlet pipe 2, for purifying the medium transported by the first air inlet pipe 2. The purification mechanism performs deep purification treatment on the medium transported by the first air inlet pipe 2 to provide a clean and stable medium foundation for subsequent pressure holding tests. The second conveying pipe 10 is installed on the top of the mounting platform plate 1. The second conveying pipe 10 is connected to the purification mechanism and is used to convey the purified medium. The second conveying pipe 10 serves as a confluence channel for the purified medium and nitrogen, and is responsible for conveying the mixed medium to the discharge mechanism. The nitrogen conveying mechanism is installed on the top of the mounting platform plate 1 and is connected to the second conveying pipe 10. It is used to convey nitrogen into the second conveying pipe 10 to meet the nitrogen filling requirements for pressure holding tests. The discharge mechanism is installed on the top of the mounting platform plate 1 and is connected to the second conveying pipe 10. It is used to realize the orderly discharge of the tested gas or mixed medium in the second conveying pipe 10, and at the same time undertakes the functions of pressure monitoring and pressure stabilization control.

[0016] In an optional embodiment: such as Figure 2 and Figure 3 As shown, the purification mechanism includes a pneumatic three-source component 5, a first conveying pipe 6, and a sterilization filter 7; The pneumatic three-source component 5 is fixedly installed on the side of the mounting platform plate 1, the sterilization filter 7 is fixedly installed on the top of the mounting platform plate 1, the first conveying pipe 6 connects the inlet end and the outlet end of the pneumatic three-source component 5, the first conveying pipe 6 at the inlet end of the pneumatic three-source component 5 is connected to the first air inlet pipe 2, the first conveying pipe 6 at the outlet end of the pneumatic three-source component 5 is connected to the inlet end of the sterilization filter 7, and the outlet end of the sterilization filter 7 is connected to the second conveying pipe 10.

[0017] It should be noted that the pneumatic three-source component 5, the first delivery pipe 6, and the sterilization filter 7 work together for three purposes: first, purification, removing moisture, oil, and other impurities from the air to prevent wear or contamination of subsequent components; second, pressure stabilization, keeping the input air pressure within a preset range to prevent pressure fluctuations from affecting test accuracy; and third, lubrication, providing a small amount of lubrication for moving parts in the subsequent pipeline, such as valve cores, to improve component lifespan and operational flexibility. After air purification, pressure stabilization, and lubrication, the air is smoothly delivered to the sterilization filter 7 through the first delivery pipe 6. The sterilization filter 7 uses a high-precision filter membrane material, which can efficiently remove microorganisms in the air, including bacteria, fungi, viruses, and tiny particles with a diameter of ≥0.1μm, achieving dual treatment of sterilization and purification of the fluid. At the same time, its filter material is chemically inert, which can ensure that the fluid components do not undergo chemical reactions and are not contaminated. The air that has been deeply purified by the sterilization filter 7 is finally smoothly delivered to the second delivery pipe 10, providing a qualified clean medium for subsequent pressure holding tests. The first air inlet pipe 2 is connected to an air supply device such as an air compressor, which provides a continuous and stable air source to the first air inlet pipe 2. During the air delivery process, the first pneumatic ball valve 3 can achieve rapid opening and closing of the pipeline medium through pneumatic drive, with a short response time. At the same time, the medium flow rate can be finely adjusted according to test requirements, and the medium can also be reversed under special working conditions, ensuring the controllability and flexibility of the medium delivery.

[0018] In an optional embodiment: such as Figure 2 and Figure 3 As shown, the nitrogen delivery mechanism includes a second pneumatic ball valve 4, a second air inlet pipe 8, and a first delivery flexible tube 9; The second air intake pipe 8 is fixedly installed on the top of the mounting platform plate 1. The second pneumatic ball valve 4 is installed on the second air intake pipe 8. The first conveying flexible tube 9 is connected to the end of the second air intake pipe 8. The first conveying flexible tube 9 is connected to the second conveying pipe 10.

[0019] It should be noted that the second pneumatic ball valve 4, the second air inlet pipe 8 and the first conveying flexible pipe 9 are coordinated. The second air inlet pipe 8 is connected to the nitrogen supply equipment. The nitrogen supply equipment provides high-purity nitrogen to the second air inlet pipe 8. The nitrogen is stably transported to the first conveying flexible pipe 9 through the second air inlet pipe 8, and then smoothly merges into the second conveying pipe 10 through the first conveying flexible pipe 9. It is mixed with the purified air or used alone as a pressure holding test medium, depending on the test conditions. The second pneumatic ball valve 4 uses the same pneumatic control method as the first pneumatic ball valve 3, which enables rapid on / off switching of nitrogen supply. The response speed is consistent with that of the first pneumatic ball valve 3, facilitating centralized system control. At the same time, the nitrogen flow rate can be finely adjusted according to the pressure requirements of the pressure holding test to ensure that the nitrogen filling speed meets the test standards. When it is necessary to switch the medium type, the reversing function of the second pneumatic ball valve 4 can also cut off the nitrogen supply channel and temporarily seal the pipeline to avoid medium backflow and contamination.

[0020] In an optional embodiment: such as Figure 2 and Figure 3 As shown, the discharge mechanism includes a second conveying flexible channel 11, a first electro-proportional valve 12, a third pneumatic ball valve 13, a first pressure transmitter 14, a first air outlet pipe 15, a third conveying flexible channel 16, a second electro-proportional valve 17, a second air outlet pipe 18, a second pressure transmitter 19, and a fourth pneumatic ball valve 20. The first air outlet pipe 15 and the second air outlet pipe 18 are both fixedly installed on the top of the mounting platform plate 1. The first electro-proportional valve 12, the third pneumatic ball valve 13 and the first pressure transmitter 14 are all installed on the first air outlet pipe 15. The first air outlet pipe 15 is connected to the first electro-proportional valve 12, and the second conveying soft channel 11 is connected to the second conveying pipe 10. The second electro-proportional valve 17, the second pressure transmitter 19, and the fourth pneumatic ball valve 20 are all installed on the second air outlet pipe 18. The third conveying flexible pipe 16 is connected to the second air outlet pipe 18 and the third conveying flexible pipe 16 is connected to the second conveying pipe 10.

[0021] It should be noted that by cooperating with the second and third flexible conveying channels 11, single-channel operation or simultaneous operation of both channels can be selected according to different stages of the pressure holding test, such as the pressure relief stage, the media discharge stage after the test, or different pressure level requirements, so as to flexibly achieve the orderly discharge of the media in the second conveying pipeline 10. Both the second and third flexible conveying channels 11 and 16 are made of high-pressure resistant flexible material and are equipped with an anti-twist structure to prevent pipeline deformation or damage due to pressure fluctuations during media transportation. The first pressure transmitter 14 and the second pressure transmitter 19 can collect the actual pressure data in the first outlet pipe 15 and the second outlet pipe 18 in real time, and convert the data into electrical signals to feed back to the central control system of the equipment in real time. The control system has a built-in preset target pressure parameter that can be flexibly set according to different test requirements. By comparing the deviation between the actual pressure and the target pressure, it automatically generates adjustment commands: for the first outlet pipe 15 loop, it adjusts the output air pressure of the first electro-proportional valve 12, and drives the valve core opening of the third pneumatic ball valve 13 to change precisely through the air pressure change, thereby adjusting the medium flow rate of the loop and realizing pressure fine adjustment. For the second outlet pipe 18 loop, the pressure and flow rate of the other loop are adjusted by changing the valve core opening of the fourth pneumatic ball valve 20 through adjusting the output air pressure of the second electro-proportional valve 17. This dual-loop coordinated adjustment can quickly stabilize the overall system pressure at the target value, ensuring the accuracy of the pressure holding test, while avoiding excessive pressure fluctuations that may occur with single-loop adjustment.

[0022] In an optional embodiment: such as Figures 1 to 3 As shown, a third air inlet pipe 21 and a third air outlet pipe 24 are fixedly installed on the top of the mounting platform plate 1. The end of the third air inlet pipe 21 is connected to a return pipe 23, which is connected to the third air outlet pipe 24. A fifth pneumatic ball valve 22 is installed on the third air inlet pipe 21, and a sixth pneumatic ball valve 25 is installed on the third air outlet pipe 24.

[0023] It should be noted that, through the cooperation of the third air intake pipe 21, the fifth pneumatic ball valve 22, the return pipe 23, the third air outlet pipe 24, and the sixth pneumatic ball valve 25, an independent flushing of the circuit can be formed. Specifically, the first pneumatic ball valve 3 is closed, and the third air outlet pipe 24 is connected to the second air inlet pipe 8 through an external pipe. The third air inlet pipe 21 is connected to a water supply device, such as a water pump. The water supply device is connected to a water storage tank. The second pneumatic ball valve 4, the fifth pneumatic ball valve 22, and the sixth pneumatic ball valve 25 are opened. After the water supply device delivers the cleaning fluid, it can flow through the third air inlet pipe 21, the return pipe 23, the third air outlet pipe 24, the second air inlet pipe 8, the first conveying flexible pipe 9, the second conveying pipe 10, the second conveying flexible pipe 11, the third conveying flexible pipe 16, the first air outlet pipe 15, and the second air outlet pipe 18 to flush the internal pipes of the equipment, prevent cross-contamination, or verify the unobstructedness of the pipes. In an optional embodiment: such as Figure 2 and Figure 3 As shown, a water tank 27 is fixedly installed on the top of the mounting platform plate 1, and a third conveying pipe 26 is connected to the return pipe 23. One end of the third conveying pipe 26 is located above the water tank 27.

[0024] It should be noted that, through the cooperation of the third conveying pipe 26 and the water tank 27, before flushing the equipment pipeline, the sixth pneumatic ball valve 25 is closed, and the cleaning fluid is guided to the water tank 27 along the third air inlet pipe 21, the return pipe 23 and the third conveying pipe 26, which can flush the water supply equipment conveying pipe, the third air inlet pipe 21 and the return pipe 23, and keep the pipeline environment clean.

[0025] The usage process of this utility model is as follows: Connect the first air outlet pipe 15 and the second air outlet pipe 18 to the test product, open the first pneumatic ball valve 3 and the second pneumatic ball valve 4, and the air supply equipment provides a continuous and stable air source to the first air inlet pipe 2. When the air source is transported through the pneumatic three-source component 5, the first conveying pipe 6 and the sterilization filter 7, the air source is purified by the pneumatic three-source component 5 and the sterilization filter 7. After purification, the air enters the interior of the second conveying pipe 10. The second pneumatic ball valve 4 is opened to inject nitrogen into the second inlet pipe 8. At the same time, nitrogen is transported to the test product through the second delivery flexible pipe 11 and the first outlet pipe 15, and the third delivery flexible pipe 16 and the second outlet pipe 18. The first electro-proportional valve 12 and the third pneumatic ball valve 13, the second electro-proportional valve 17 and the fourth pneumatic ball valve 20 provide precise pressure control. By fine-tuning the valve opening, pressure fluctuations caused by micro-leakage or temperature changes are compensated to stabilize the pressure at the target value. The first pressure transmitter 14 and the second pressure transmitter 19 continuously monitor pressure changes. The data can be used to evaluate the sealing performance of the system and calculate the leakage rate.

[0026] The control method in this application is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. This part is not the innovation of this utility model. Furthermore, this application is mainly used to protect the structure, shape and their combination. Therefore, this application will not explain the control method and circuit connection in detail. The device is powered by an external power supply.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A nitrogen filling and pressure holding device, characterized in that, include: The mounting platform plate (1) has a first air intake pipe (2) fixedly installed on its top, and a first pneumatic ball valve (3) is provided on the first air intake pipe (2). A purification mechanism is installed on the top of the mounting platform plate (1). The purification mechanism is connected to the first air intake pipe (2) and is used to purify the medium transported by the first air intake pipe (2). The second conveying pipe (10) is installed on the top of the mounting platform plate (1). The second conveying pipe (10) is connected to the purification mechanism and is used to convey the purified medium after purification by the purification mechanism. A nitrogen delivery mechanism is installed on the top of the mounting platform plate (1) and connected to the second delivery pipe (10) for delivering nitrogen into the second delivery pipe (10); The discharge mechanism is installed on the top of the mounting platform plate (1) and connected to the second conveying pipe (10) to achieve the orderly discharge of the gas or mixed medium after testing in the second conveying pipe (10).

2. The nitrogen filling control and pressure holding device according to claim 1, characterized in that: The purification mechanism includes a pneumatic three-source component (5), a first conveying pipe (6), and a sterilization filter (7); The pneumatic three-source component (5) is fixedly installed on the side of the mounting platform plate (1), the sterilization filter (7) is fixedly installed on the top of the mounting platform plate (1), the first conveying pipe (6) is connected to the inlet end and the outlet end of the pneumatic three-source component (5), the first conveying pipe (6) at the inlet end of the pneumatic three-source component (5) is connected to the first air inlet pipe (2), the first conveying pipe (6) at the outlet end of the pneumatic three-source component (5) is connected to the inlet end of the sterilization filter (7), and the outlet end of the sterilization filter (7) is connected to the second conveying pipe (10).

3. The nitrogen filling control and pressure holding device according to claim 1, characterized in that: The nitrogen delivery mechanism includes a second pneumatic ball valve (4), a second air inlet pipe (8), and a first delivery flexible channel (9); The second air intake pipe (8) is fixedly installed on the top of the mounting platform plate (1), the second pneumatic ball valve (4) is installed on the second air intake pipe (8), the first conveying soft tube (9) is connected to the end of the second air intake pipe (8), and the first conveying soft tube (9) is connected to the second conveying pipe (10).

4. The nitrogen filling control and pressure holding device according to claim 1, characterized in that: The discharge mechanism includes a second conveying flexible channel (11), a first electro-proportional valve (12), a third pneumatic ball valve (13), a first pressure transmitter (14), a first air outlet pipe (15), a third conveying flexible channel (16), a second electro-proportional valve (17), a second air outlet pipe (18), a second pressure transmitter (19), and a fourth pneumatic ball valve (20). The first air outlet pipe (15) and the second air outlet pipe (18) are both fixedly installed on the top of the mounting platform plate (1). The first electro-proportional valve (12), the third pneumatic ball valve (13) and the first pressure transmitter (14) are all installed on the first air outlet pipe (15). The first air outlet pipe (15) is connected to the first electro-proportional valve (12). The second conveying soft tube (11) is connected to the second conveying pipe (10). The second electro-proportional valve (17), the second pressure transmitter (19) and the fourth pneumatic ball valve (20) are all installed on the second air outlet pipe (18). The third conveying soft tube (16) is connected to the second air outlet pipe (18) and the third conveying soft tube (16) is connected to the second conveying pipe (10).

5. The nitrogen filling control and pressure holding device according to claim 4, characterized in that: The top of the mounting platform plate (1) is fixedly installed with a third air inlet pipe (21) and a third air outlet pipe (24). The end of the third air inlet pipe (21) is connected to a return pipe (23). The return pipe (23) is connected to the third air outlet pipe (24). A fifth pneumatic ball valve (22) is installed on the third air inlet pipe (21), and a sixth pneumatic ball valve (25) is installed on the third air outlet pipe (24).

6. The nitrogen filling control and pressure holding device according to claim 5, characterized in that: A water tank (27) is fixedly installed on the top of the installation platform plate (1), and a third conveying pipe (26) is connected to the return pipe (23). One end of the third conveying pipe (26) is located above the water tank (27).

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