A device for water pressure test of gas cylinder by internal measurement

Abstract

The utility model belongs to gas cylinder detection equipment technical field especially, a kind of gas cylinder internal measurement method hydrostatic test device, for the problems, such as unstable fixation of existing technology gas cylinder internal measurement method hydrostatic test device, sealing detection is not comprehensive, high pressure water recycling is insufficient and inconvenient maintenance, present and propose the following scheme, it includes: work platform and gas cylinder;Support frame, fixedly connected at the bottom of work platform;Central control module, installation is at the top of work platform;Fixing device, be located at the top of work platform, for the fixed work of gas cylinder;The utility model not only effectively overcomes the many defects of existing internal measurement method hydrostatic test device, and provides a kind of fixed firm, detects accurate, energy saving, maintenance convenient gas cylinder internal measurement method hydrostatic test device by multi-device collaborative innovation design, it is applicable to the detection of large volume gas cylinder, special-shaped gas cylinder and other special scenes, with very high practical value and popularization prospect.

Description

Technical Field

[0001] This application relates to the field of gas cylinder testing equipment technology, and in particular to a gas cylinder internal testing method for water pressure testing device. Background Technology

[0002] Hydraulic pressure testing of gas cylinders is a core step in ensuring their safe use. The internal testing method, a commonly used approach, works by directly filling the cylinder with high-pressure water and monitoring pressure changes and leakage at the cylinder opening to determine its pressure resistance and sealing performance. This method eliminates the need for a water jacket around the cylinder, offering relative flexibility and suitability for large-capacity, irregularly shaped cylinders, and other special applications. However, existing internal hydraulic pressure testing devices have the following shortcomings: Poor cylinder stability: Most devices only use simple brackets or straps to fix the cylinders. During the test, the cylinders are prone to shaking due to the impact of high-pressure water, which can cause the interface seal to fail, affecting the detection accuracy and even posing a safety hazard.

[0003] Incomplete sealing detection: Traditional devices rely solely on pressure sensors to monitor overall pressure changes, making it difficult to accurately locate minute leaks at the bottle opening. This can easily lead to "false positives" or "false negatives," failing to meet the requirements for high-precision detection.

[0004] Insufficient high-pressure water recycling: After the test, the high-pressure water in the gas cylinder is directly discharged, which not only wastes water resources, but also easily pollutes the environment because the water may contain impurities that have broken off from the inner wall of the gas cylinder.

[0005] The filter is prone to clogging and is inconvenient to maintain: The filter structure of some recovery devices is fixed, and the filter channel is easily blocked after the accumulation of impurities, requiring frequent disassembly and cleaning, which affects the continuous operation efficiency of the equipment.

[0006] Chinese utility model patent CN111948058A discloses a gas cylinder hydrostatic testing device, including a pressurization system, a detection system, a pressure relief system, and corresponding piping systems. A one-way valve, multiple detection systems, a pressure relief system, a second pressure gauge, and a third pressure gauge are all connected to the main pipeline. One end of the loading valve of the detection system is connected to the main pipeline, and the other end is connected to the gas cylinder to be tested via a mass gauge. A measuring valve is connected to the pipeline between the loading valve and the mass gauge, and the outlet pipe of the measuring valve extends into a water cup located on an electronic scale. This testing device has a simple structure and stable pressurization; it solves the problem of gas cylinder backflow to the bypass during internal pressure relief, which causes errors; and it also has high efficiency and versatility, meeting the requirement of simultaneously testing multiple gas cylinders.

[0007] Existing gas cylinder internal hydrostatic testing devices suffer from drawbacks such as unstable fixation, incomplete sealing detection, insufficient high-pressure water recycling, and inconvenient maintenance. Therefore, there is an urgent need for a gas cylinder internal hydrostatic testing device that combines stable fixation, accurate sealing detection, high-pressure water recycling and filtration, and synchronous transmission functions. Utility Model Content

[0008] In order to improve the shortcomings of existing gas cylinder internal hydrostatic testing devices, such as unstable fixing, incomplete sealing detection, insufficient high-pressure water recycling, and inconvenient maintenance, this application provides a gas cylinder internal hydrostatic testing device.

[0009] The gas cylinder internal testing method hydrostatic testing device provided in this application adopts the following technical solution: A hydraulic pressure testing device for gas cylinder internal testing includes: a working platform and a gas cylinder; a support frame fixedly connected to the bottom of the working platform; and a central control module installed on the top of the working platform. A fixing device, located on top of the work platform, is used to secure the gas cylinder. A sealing test device is installed on top of the fixed device and is used to test the sealing of the gas cylinder's interfaces. The screw drive mechanism, located on the top of the support frame, is used to drive the sealing detection device to move. A water discharge device is located on one side of the sealing detection device and is used to recover the high-pressure water inside the gas cylinder. The filtration device, located at the top of the work platform, is used to filter the recycled wastewater. The sprocket and chain drive mechanism is located on the right side of the screw drive mechanism and is used to drive the screw drive mechanism and the filter device to operate simultaneously.

[0010] Preferably, the fixing device includes a fixing groove and two first push rod motors. The fixing groove is fixedly connected to the top of the working platform. The two first push rod motors are both mounted on the fixing groove and are symmetrically distributed around the longitudinal central axis of the fixing groove. The output shafts of the two first push rod motors are fixedly connected to clamping blocks. The gas cylinder is located inside the fixing groove. The two clamping blocks abut against the neck of the gas cylinder. Multiple first sensor heads are installed on the inner wall of the fixing groove and abut against the body of the gas cylinder.

[0011] Preferably, the sealing detection device includes a rubber sealing cover, on the top of which is installed an inlet check valve and an outlet check valve. The outlet check valve is fixedly connected to a conduit. Multiple second sensor heads are installed on the inner wall of the rubber sealing cover. The second sensor heads abut against the interface of the gas cylinder. The conduit extends into the interior of the gas cylinder.

[0012] Preferably, the screw drive mechanism includes a rotary motor and a slider. The rotary motor is installed on the left side of the support frame. The output shaft of the rotary motor is fixedly connected to a bidirectional lead screw. The bidirectional lead screw is threadedly connected to the slider. A sliding groove is installed at the bottom of the support frame. The sliding groove is slidably connected to the slider. A second push rod motor is installed at the top of the slider. The output end of the second push rod motor is fixedly connected to the top of the rubber sealing cover.

[0013] Preferably, the water flow outlet device includes a filter box, which is fixedly connected to the top of the working platform. An inlet water pump and an outlet water pump are installed on the filter box. The outlet water pump is fixedly connected to the inlet of the inlet check valve, and the inlet of the inlet water pump is fixedly connected to the outlet of the outlet check valve.

[0014] Preferably, the filtration device includes a recovery tank, multiple telescopic rods, and multiple telescopic springs. The recovery tank is fixedly connected to the inner wall of the filter box. A filter plate is rotatably connected to the right side of the recovery tank. A rubber seal is fixedly connected to the top of the filter plate, and the rubber seal abuts against the inner wall of the filter box. Two fixed plates are fixedly connected inside the filter box. The two ends of the multiple telescopic rods and multiple telescopic springs are respectively fixedly connected to the filter plate and the two fixed plates. A cam is rotatably connected to the inner wall of the filter box, and the cam abuts against the bottom of the filter plate.

[0015] Preferably, the sprocket and chain drive mechanism includes a chain, a sprocket is fixedly connected to the right end of the bidirectional lead screw, the sprocket is connected to another sprocket via a chain drive, and the other sprocket is fixedly connected to the right end of the cam.

[0016] In summary, this application includes at least one of the following beneficial technical effects: 1. Dual-fixation coordination ensures stable and wobbly gas cylinder: The fixing slot of the fixing device limits the gas cylinder body, and the first push rod motor drives the clamping block to clamp the neck of the gas cylinder, forming a dual fixation of "cylinder body limiting + neck clamping"; multiple first sensor heads monitor the gas cylinder fixation status in real time, and if loosening occurs, they immediately feed back to the central control module to ensure the stability of the gas cylinder during the test and avoid displacement caused by high-pressure water impact.

[0017] 2. Accurate and comprehensive sealing detection, avoiding false alarms and missed detections: The multiple second sensor heads of the sealing detection device are evenly distributed on the inner wall of the rubber sealing cap and fit tightly with the gas cylinder interface, which can accurately capture minute leakage signals at the interface; at the same time, combined with the conduit and the water outlet check valve to monitor the pressure changes inside the gas cylinder, the dual detection method improves the accuracy of sealing judgment and avoids the limitations of single pressure monitoring.

[0018] 3. High-pressure water closed-loop recycling, energy saving and environmental protection: The water flow outlet device and the filtration device form a closed loop. After the test, the high-pressure water in the gas cylinder is pumped into the filter box through the outlet one-way valve and the inlet water pump. After filtration and purification, it is reinjected into the gas cylinder for recycling through the outlet water pump and the inlet one-way valve. The water resource utilization rate is increased by more than 85%, reducing sewage discharge and resource waste.

[0019] 4. Self-cleaning filter, convenient and efficient maintenance: The sprocket and chain drive mechanism drives the bidirectional screw and cam to rotate synchronously. The cam periodically lifts the filter plate, and with the elastic reset of the telescopic rod and telescopic spring, the filter plate vibrates up and down, shaking off the impurities accumulated on the surface into the recycling tank, realizing the self-cleaning of the filter plate. It eliminates the need for frequent disassembly and cleaning, improving the continuous operation efficiency of the equipment.

[0020] 5. Single-power synchronous transmission, energy-saving and reliable: Only one rotating motor drives the screw transmission mechanism and the filter device simultaneously through sprocket and chain transmission, reducing the number of power sources, reducing energy consumption, and the transmission structure is simple and compact, with good synchronization and low equipment failure rate.

[0021] This invention not only effectively overcomes many shortcomings of existing internal testing methods for hydrostatic pressure, but also provides a gas cylinder internal testing method hydrostatic pressure testing device that is stable, accurate, energy-saving, environmentally friendly, and easy to maintain through the collaborative innovative design of multiple devices. It is suitable for testing in special scenarios such as large-capacity gas cylinders and irregularly shaped gas cylinders, and has high practical value and promising prospects for promotion. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure in Embodiment 1 of this application; Figure 2 This is a schematic diagram of the internal structure of the fixing device in Embodiment 1 of this application; Figure 3 This is a schematic diagram of the internal structure of the filter box in Embodiment 1 of this application; Figure 4 This is a schematic diagram of the connection structure between the screw drive mechanism and the sealing detection device in Embodiment 1 of this application.

[0023] Reference numerals: 1. Rotating motor; 2. Support frame; 3. Slide groove; 4. Chain; 5. Sprocket; 6. Working platform; 7. Central control module; 8. Clamping block; 9. Fixing groove; 10. First push rod motor; 11. First sensor head; 12. Gas cylinder; 13. Inlet water pump; 14. Filter box; 15. Telescopic rod; 16. Recycling tank; 17. Telescopic spring; 18. Outlet water pump; 19. Fixing plate; 20. Rubber seal; 21. Filter plate; 22. Cam; 23. Rubber sealing cover; 24. Two-way lead screw; 25. Slider; 26. Second push rod motor; 27. Second sensor head; 28. Inlet check valve; 29. ​​Conduit; 30. Outlet check valve. Detailed Implementation

[0024] Example 1 The following is in conjunction with the appendix Figures 1-4 The first embodiment of this application will be described in further detail.

[0025] A hydraulic pressure testing device for gas cylinder internal testing includes: a working platform 6 and a gas cylinder 12; a support frame 2, fixedly connected to the bottom of the working platform 6; and a central control module 7, installed on the top of the working platform 6. A fixing device is located on the top of the working platform 6 and is used to fix the gas cylinder 12. A sealing test device is located on top of the fixed device and is used to perform sealing tests on the interfaces of gas cylinder 12. The screw drive mechanism, located on the top of the support frame 2, is used to drive the sealing detection device to move. A water discharge device is located on one side of the sealing detection device and is used to recover the high-pressure water inside the gas cylinder 12. A filtration device is located on top of the working platform 6 and is used to filter the recycled wastewater. The sprocket and chain drive mechanism is located on the right side of the screw drive mechanism and is used to drive the screw drive mechanism and the filter device to operate simultaneously.

[0026] In this embodiment, the fixing device includes a fixing groove 9 and two first push rod motors 10. The fixing groove 9 is fixedly connected to the top of the working platform 6. The two first push rod motors 10 are both installed on the fixing groove 9. The two first push rod motors 10 are symmetrically distributed with the longitudinal central axis of the fixing groove 9 as the center. The output shafts of the two first push rod motors 10 are fixedly connected to clamping blocks 8. The gas cylinder 12 is located inside the fixing groove 9. The two clamping blocks 8 are both in contact with the neck of the gas cylinder 12. Multiple first sensor heads 11 are installed on the inner wall of the fixing groove 9. The multiple first sensor heads 11 are in contact with the body of the gas cylinder 12. Specifically, after the gas cylinder 12 is placed into the fixing slot 9, the first push rod motor 10 is started, and the clamping block 8 moves towards the neck of the gas cylinder and clamps it; the first sensor head 11 contacts the cylinder body and monitors in real time whether there is any leakage of water on the surface of the gas cylinder, and the data is transmitted to the central control module 7.

[0027] In this embodiment, the sealing detection device includes a rubber sealing cover 23. An inlet check valve 28 and an outlet check valve 30 are installed on the top of the rubber sealing cover 23. A conduit 29 is fixedly connected to the output port of the outlet check valve 30. A plurality of second sensor heads 27 are installed on the inner wall of the rubber sealing cover 23. The second sensor heads 27 abut against and overlap with the interface of the gas cylinder 12. The conduit 29 extends into the interior of the gas cylinder 12. Specifically, after the rubber sealing cap 23 covers the gas cylinder interface, the second sensor head 27 is attached to the interface to monitor for leakage; the inlet check valve 28 is used to inject high-pressure water, and the outlet check valve 30 is used to discharge high-pressure water.

[0028] In this embodiment, the screw transmission mechanism includes a rotary motor 1 and a slider 25. The rotary motor 1 is installed on the left side of the support frame 2. The output shaft of the rotary motor 1 is fixedly connected to a bidirectional lead screw 24. The bidirectional lead screw 24 is threadedly connected to the slider 25. A slide groove 3 is installed at the bottom of the support frame 2. The slide groove 3 is slidably connected to the slider 25. A second push rod motor 26 is installed at the top of the slider 25. The output end of the second push rod motor 26 is fixedly connected to the top of the rubber sealing cover 23. Specifically, start the rotating motor 1, the bidirectional lead screw 24 rotates and drives the slider 25 to move along the slide groove 3 to adjust the horizontal position of the rubber sealing cover 23; start the second push rod motor 26 to drive the rubber sealing cover 23 to rise and fall, so as to realize the closing and opening of the gas cylinder interface.

[0029] In this embodiment, the water flow outlet device includes a filter box 14, which is fixedly connected to the top of the working platform 6. An inlet water pump 13 and an outlet water pump 18 are installed on the filter box 14. The output port of the outlet water pump 18 is fixedly connected to the input port of the inlet check valve 28, and the input port of the inlet water pump 13 is fixedly connected to the output port of the outlet check valve 30. Specifically, after the test, the inlet water pump 13 is started, and the high-pressure water in the gas cylinder is drawn into the filter box 14 through the outlet check valve 30 and the conduit 29; after filtration, the outlet water pump 18 pumps the clean water into the gas cylinder for recycling through the inlet check valve 28.

[0030] In this embodiment, the filtration device includes a recovery tank 16, multiple telescopic rods 15, and multiple telescopic springs 17. The recovery tank 16 is fixedly connected to the inner wall of the filter box 14. A filter plate 21 is rotatably connected to the right side of the recovery tank 16. A rubber seal 20 is fixedly connected to the top of the filter plate 21. The rubber seal 20 abuts against the inner wall of the filter box 14. Two fixing plates 19 are fixedly connected inside the filter box 14. The two ends of the multiple telescopic rods 15 and the multiple telescopic springs 17 are fixedly connected to the filter plate 21 and the two fixing plates 19, respectively. A cam 22 is rotatably connected to the inner wall of the filter box 14. The cam 22 abuts against the bottom of the filter plate 21.

[0031] Specifically, after the wastewater enters the filter box 14, it is filtered by the filter plate 21 to remove impurities; the cam 22 rotates to lift the filter plate 21, and the telescopic spring 17 resets to make the filter plate vibrate, and the impurities fall into the recovery tank 16.

[0032] In this embodiment, the sprocket and chain drive mechanism includes a chain 4, a sprocket 5 is fixedly connected to the right end of the bidirectional lead screw 24, another sprocket 5 is connected to the sprocket 5 through the chain 4, and the other sprocket 5 is fixedly connected to the right end of the cam 22.

[0033] Specifically, when the rotating motor 1 drives the bidirectional lead screw 24 to rotate, the cam 22 is driven to rotate synchronously through the sprocket and chain drive, realizing the coordinated operation of the screw drive and the filtering vibration. In addition, the slack side of the chain 4 is equipped with two limit wheels to provide tension to the chain 4.

[0034] The implementation principle of the gas cylinder internal test water pressure test device in this application embodiment is as follows: 1. Equipment initialization and gas cylinder fixing: Start the equipment and set parameters such as test pressure and pressure holding time through the central control module 7; put the gas cylinder to be tested 12 into the fixing slot 9, start the first push rod motor 10, clamp the neck of the gas cylinder 8, and after the first sensor head 11 confirms that it is fixed and stable, proceed to the next step.

[0035] 2. Sealing cap docking and water pressure test: Start the rotating motor 1, the bidirectional lead screw 24 drives the slider 25 to move, and adjust the rubber sealing cap 23 to be directly above the gas cylinder interface; start the second push rod motor 26, the rubber sealing cap 23 descends to close the interface, and the second sensor head 27 is in contact with the interface; start the water pump 18, inject high-pressure water into the gas cylinder through the inlet one-way valve 28 to the set pressure, maintain the pressure, and monitor the signal and pressure change of the second sensor head 27 through the central control module 7.

[0036] 3. High-pressure water recovery and filtration: After the test, start the inlet water pump 13. The high-pressure water in the gas cylinder is drawn into the filter box 14 through the conduit 29 and the outlet one-way valve 30. At the same time, the rotating motor 1 drives the cam 22 to rotate synchronously, the filter plate 21 vibrates up and down, and the impurities fall into the recovery tank 16. The filtered clean water is stored at the bottom of the filter box 14.

[0037] 4. Test completion and equipment reset: Turn off the inlet water pump 13 and the outlet water pump 18, start the second push rod motor 26 to drive the rubber sealing cover 23 to rise, the first push rod motor 10 drives the clamping block 8 to reset, and take out the gas cylinder 12; clean the impurities in the recovery tank 16, and restore the equipment to the test state.

[0038] Example 2 The difference between this embodiment and embodiment one is that: elastic clamping blocks are fixedly connected to the inner walls of both clamping blocks 8, and the gas cylinder 12 is clamped by the two elastic clamping blocks, thereby avoiding the problem of damage to the gas cylinder 12 caused by rigid clamping.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for internal hydrostatic testing of a gas cylinder, comprising: The work platform (6) and the gas cylinder (12); the support frame (2), fixedly connected to the bottom of the work platform (6); the central control module (7), installed on the top of the work platform (6); characterized in that: A fixing device is provided on the top of the working platform (6) for fixing the gas cylinder (12); A sealing test device is installed on the top of the fixed device and is used to perform sealing tests on the interface of the gas cylinder (12). The screw drive mechanism is located on the top of the support frame (2) and is used to drive the sealing detection device to move. A water discharge device is located on one side of the sealing detection device and is used to recycle the high-pressure water inside the gas cylinder (12). A filtration device is located on top of the work platform (6) and is used to filter the recycled wastewater. The sprocket and chain drive mechanism is located on the right side of the screw drive mechanism and is used to drive the screw drive mechanism and the filter device to operate simultaneously.

2. The gas cylinder internal water pressure testing device according to claim 1, characterized in that: The fixing device includes a fixing groove (9) and two first push rod motors (10). The fixing groove (9) is fixedly connected to the top of the working platform (6). The two first push rod motors (10) are both installed on the fixing groove (9). The two first push rod motors (10) are symmetrically distributed with the longitudinal central axis of the fixing groove (9) as the center. The output shafts of the two first push rod motors (10) are fixedly connected to clamping blocks (8). The gas cylinder (12) is located inside the fixing groove (9). The two clamping blocks (8) are in contact with the neck of the gas cylinder (12). Multiple first sensor heads (11) are installed on the inner wall of the fixing groove (9). The multiple first sensor heads (11) are in contact with the body of the gas cylinder (12).

3. The cylinder internal water pressure testing device according to claim 2, characterized in that: The sealing detection device includes a rubber sealing cover (23), on the top of which is installed an inlet check valve (28) and an outlet check valve (30). The outlet check valve (30) is fixedly connected to a conduit (29). Multiple second sensor heads (27) are installed on the inner wall of the rubber sealing cover (23). The second sensor heads (27) are in contact with the interface of the gas cylinder (12). The conduit (29) extends into the interior of the gas cylinder (12).

4. The cylinder internal water pressure testing device according to claim 3, characterized in that: The screw drive mechanism includes a rotary motor (1) and a slider (25). The rotary motor (1) is installed on the left side of the support frame (2). The output shaft of the rotary motor (1) is fixedly connected to a bidirectional lead screw (24). The bidirectional lead screw (24) is threadedly connected to the slider (25). A sliding groove (3) is installed at the bottom of the support frame (2). The sliding groove (3) is slidably connected to the slider (25). A second push rod motor (26) is installed at the top of the slider (25). The output end of the second push rod motor (26) is fixedly connected to the top of the rubber sealing cover (23).

5. The cylinder internal water pressure testing device according to claim 4, characterized in that: The water flow outlet device includes a filter box (14), which is fixedly connected to the top of the working platform (6). The filter box (14) is equipped with an inlet water pump (13) and an outlet water pump (18). The outlet of the outlet water pump (18) is fixedly connected to the inlet of the inlet check valve (28), and the inlet of the inlet water pump (13) is fixedly connected to the outlet of the outlet check valve (30).

6. The cylinder internal water pressure testing device according to claim 5, characterized in that: The filtration device includes a recovery tank (16), multiple telescopic rods (15) and multiple telescopic springs (17). The recovery tank (16) is fixedly connected to the inner wall of the filter box (14). A filter plate (21) is rotatably connected to the right side of the recovery tank (16). A rubber seal (20) is fixedly connected to the top of the filter plate (21). The rubber seal (20) abuts against the inner wall of the filter box (14). Two fixed plates (19) are fixedly connected inside the filter box (14). The two ends of the multiple telescopic rods (15) and the multiple telescopic springs (17) are fixedly connected to the filter plate (21) and the two fixed plates (19) respectively. A cam (22) is rotatably connected to the inner wall of the filter box (14). The cam (22) abuts against the bottom of the filter plate (21).

7. The cylinder internal water pressure testing device according to claim 6, characterized in that: The sprocket and chain drive mechanism includes a chain (4), and a sprocket (5) is fixedly connected to the right end of the bidirectional lead screw (24). The sprocket (5) is connected to another sprocket (5) through the chain (4). The other sprocket (5) is fixedly connected to the right end of the cam (22).

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