Pre-checking device for pressure vessel leakage

Abstract

This utility model discloses a pre-inspection device for pressure vessel leaks, including a housing. The internal space of the housing forms a detection chamber, which houses a container to be inspected, a clamping mechanism, an airtight mechanism, a vacuuming mechanism, and a pressure sensor. A controller is electrically connected to the vacuuming mechanism, the clamping mechanism, and the pressure sensor, and can continuously receive feedback signals from the pressure sensor and determine whether the container to be inspected is leaking based on the feedback signals. Through this method, the pre-inspection device for pressure vessel leaks integrates automatic control, adaptive clamping, reliable sealing, precise vacuuming, and pressure monitoring, solving the problems of time-consuming and inefficient traditional detection methods. It can achieve highly efficient and accurate automated leak detection, accurately identify slow leaks, and significantly improve detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, and in particular to a pre-inspection device for pressure vessel leakage. Background Technology

[0002] Chemical pressure vessels are specialized devices used to store or handle high-pressure gases, liquids, or chemicals. They are typically made of pressure- and corrosion-resistant materials such as stainless steel, nickel alloys, or titanium alloys, and are equipped with safety valves and pressure sensors to ensure safe operation. These vessels are widely used in the chemical industry, including manufacturing, refining, and chemical processing, to withstand and control fluids under high-pressure conditions, ensuring production safety and efficiency. The design of these vessels must comply with stringent regulations and standards to ensure structural strength and sealing performance, preventing leaks and accidents.

[0003] A search revealed Chinese Patent Publication No. CN220670870U, which discloses a leak detection device for chemical pressure vessels. The device includes a detection chamber, on which the chemical pressure vessel is placed. A second control valve is opened, allowing gas from a storage tank to be guided into the detection chamber through a first and second conduit. A gas flow meter controls the amount of gas entering the chamber, enabling quantitative gas delivery. A pressure sensor detects the pressure within the chamber and transmits the data to a controller, which receives and displays the data on a screen. Under quantitative gas delivery conditions, if the pressure when the chemical pressure vessel is placed inside is higher than the pressure before placement, it indicates that the pressure vessel is well-sealed. This method enables leak detection of chemical pressure vessels, offering fast and efficient operation, adaptability to different vessel sizes, and wide applicability.

[0004] The working principle of this chemical pressure vessel leakage detection device is as follows: the container to be tested is placed in a sealed box, and the pressure is compared before and after the container is placed in the box, and when the same amount of gas is filled in, to determine whether the container is leaking.

[0005] However, in practical applications, this device has obvious drawbacks: On the one hand, if there is only a minor leak in the container, the pressure inside the testing chamber and inside the container will gradually reach equilibrium over a long period of time, making it impossible to detect the slow leak; on the other hand, testing a single container requires a long operation time, resulting in low testing efficiency. Utility Model Content

[0006] The main technical problem solved by this utility model is to provide a pre-inspection device for pressure vessel leaks, which integrates automatic control, adaptive clamping, reliable sealing, precise vacuuming and precise pressure monitoring. It effectively solves the problems of long operation time and low efficiency in traditional detection, and can achieve efficient and accurate automated leak detection. Even slow leaks can be accurately identified, significantly improving detection efficiency.

[0007] To solve the above-mentioned technical problems, the present invention provides a pre-inspection device for pressure vessel leakage, comprising: a housing, the internal space of which constitutes a detection chamber; a clamping mechanism for adaptively clamping and fixing the container to be tested; a vacuuming mechanism for creating a negative pressure inside the container to be tested and maintaining a set pressure value; an airtight mechanism connected to the downstream end of the vacuuming mechanism, capable of being inserted into the injection port of the container to be tested and radially extending and retracting to form a sealed connection with the inner wall of injection ports of different diameters; a pressure sensor for real-time detection of the pressure inside the container to be tested; and a controller electrically connected to the vacuuming mechanism, the clamping mechanism, and the pressure sensor, for receiving feedback signals from the pressure sensor and determining whether the container to be tested is leaking based on the feedback signals.

[0008] In a preferred embodiment of this utility model, a safety door is rotatably connected to the front of the housing, and an observation window and a display screen are provided on the surface of the safety door. The display screen is electrically connected to the controller.

[0009] In a preferred embodiment of the present invention, a handle is connected to one side of the safety door, and an anti-slip sleeve is attached to the handle.

[0010] In a preferred embodiment of the present invention, an alarm is connected to the top of the housing, and horns are provided on both sides of the alarm. The alarm is electrically connected to the controller.

[0011] In a preferred embodiment of this utility model, the clamping mechanism includes an electric telescopic rod, a moving block, and a pulling plate. The electric telescopic rod is electrically connected to a controller. The telescopic end of the electric telescopic rod is connected to the moving block. The pulling plate is hinged to both sides of the moving block. Each pulling plate has a clamping plate connected to the other side. The clamping plate is slidably connected to a sliding groove on the rear side of the box. A plurality of holes are provided on one side of the clamping plate. A buffer column is slidably installed in the hole. A buffer flexible plate is connected to the outer end of the buffer column. The inner end of the buffer column is elastically connected to the clamping plate via a spring.

[0012] In a preferred embodiment of the present invention, the vacuuming mechanism includes a linear drive assembly, a rubber cylinder, and a vacuum cylinder. The rubber cylinder and the vacuum cylinder form a sliding seal fit, and the linear drive assembly can drive the rubber cylinder to perform linear reciprocating motion inside the vacuum cylinder.

[0013] In a preferred embodiment of the present invention, the linear drive assembly includes a servo motor, a gear, a rack plate, and a moving column. The servo motor is electrically connected to the controller. The output end of the servo motor is connected to the gear. The outer side of the gear is meshed with the rack plate. The rack plate passes through the top opening of the housing and is connected to the moving column. The rubber cylinder is connected to the bottom of the moving column.

[0014] In a preferred embodiment of the present invention, a fixed cylinder is connected to the outer wall of the suction cylinder, and a fixing block is provided on both sides of the fixed cylinder, and the fixed block is connected to the inner wall of the box.

[0015] In a preferred embodiment of this utility model, the airtight mechanism includes a hollow cylinder, a movable cylinder, a rotating plate, a support plate, and a conical sealing cloth. The hollow cylinder is connected to the bottom of the suction cylinder for inserting the container to be tested into the injection port. The movable cylinder is slidably connected to the outer wall of the hollow cylinder. One end of the movable cylinder is movably connected to the rotating plate, and the other end is movably connected to the support plate. The rotating plate and the support plate are movably connected. The outer wall of the support plate is provided with a conical sealing cloth, which is a flexible sealing cloth.

[0016] In a preferred embodiment of the present invention, the movable cylinder slides axially along the outer wall of the hollow cylinder, and the linear motion is converted into the radial extension and retraction motion of the support plate by the rotating plate, so as to drive the conical sealing cloth to expand or retract synchronously.

[0017] The beneficial effects of this utility model are: it integrates automatic control, adaptive clamping, reliable sealing, precise vacuuming and pressure monitoring, solves the problem of time-consuming and inefficient traditional detection, and can realize efficient and accurate automated leak detection, accurately identify slow leaks, and significantly improve detection efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a front view of a preferred embodiment of the pressure vessel leakage pre-inspection device of this utility model; Figure 2 This is a perspective view of a preferred embodiment of the pressure vessel leakage pre-inspection device of this utility model; Figure 3 This is a schematic diagram of a preferred embodiment of the linear drive component of this utility model; Figure 4 This is a schematic diagram of a preferred embodiment of the connection between the air extraction cylinder and the airtight mechanism of this utility model; Figure 5 This is a schematic diagram of a preferred embodiment of the clamping mechanism of this utility model; The components in the attached diagram are labeled as follows: 1. Box body; 2. Clamping mechanism; 201. Electric telescopic rod; 202. Moving block; 203. Pulling plate; 204. Clamping plate; 205. Hole; 206. Buffer column; 207. Spring; 208. Buffer flexible plate; 209. Slide groove. 3. Safety door; 4. Servo motor; 5. Gear; 6. Rack plate; 7. Moving column; 8. Rubber cylinder; 9. Pressure sensor; 10. Vacuum cylinder; 11. Hollow cylinder; 12. Moving cylinder; 13. Rotating plate; 14. Support plate; 15. Conical sealing cloth; 16. Fixing block; 17. Fixing cylinder; 18. Display screen; 19. Observation window; 20. Outer frame; 21. Alarm; 22. Horn; 23. Handle; 24. Anti-slip sleeve; 25. Controller; 26. Housing; 27. Protective cover. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] This utility model relates to a preferred embodiment of a pre-inspection device for pressure vessel leaks.

[0022] Please see Figures 1 to 5 The pressure vessel leakage pre-inspection device includes a housing 1, the internal space of which forms a detection chamber, and the detection chamber is equipped with a container to be tested, a clamping mechanism, an airtight mechanism, a vacuuming mechanism, and a pressure sensor 9.

[0023] A controller 25 is also provided on the right side of the outer wall of the housing 1. The controller 25 is located inside the housing 26, and a protective cover 27 is rotatably connected to the housing 26. The housing 26 can prevent damage to the controller 25, and the protective cover 27 can prevent dust and other substances from entering the controller 25 and causing damage.

[0024] The controller 25 is configured to be electrically connected to the vacuuming mechanism, the clamping mechanism and the pressure sensor, and is able to continuously receive feedback signals from the pressure sensor and determine whether there is a leak inside the container to be detected based on the feedback signals.

[0025] Furthermore, a safety door 3 is rotatably connected to the front of the housing 1. The surface of the safety door 3 is provided with an observation window 19 and a display screen 18. An outer frame 20 is connected to the outer periphery of the observation window 19. The display screen 18 is electrically connected to the controller 25. The pressure change can be easily seen through the display screen 18, and the internal condition of the housing 1 can be well observed through the observation window 19.

[0026] A handle 23 is connected to one side of the safety door 3. An anti-slip sleeve 24 is attached to the handle 23. The handle 23 makes it easy to open the safety door 3, and the anti-slip sleeve 24 improves the anti-slip ability of the handle 23.

[0027] An alarm 21 is connected to the top of the housing 1. Both sides of the alarm 21 are equipped with horns 22. The alarm 21 is electrically connected to the controller 25. The alarm 21 can sound an alarm when a leak is detected.

[0028] In detail, the first is the clamping mechanism, which is located inside the lower part of the housing 1. It is used to adaptively clamp and fix the container to be tested, ensuring that the container position is stable during the test and providing a reliable foundation for subsequent airtightness testing.

[0029] The clamping mechanism 2 includes an electric telescopic rod 201, a moving block 202, a pulling plate 203, a clamping plate 204, and a buffer column 206. The electric telescopic rod 201 is electrically connected to the controller 25. The telescopic end of the electric telescopic rod 201 is connected to the moving block 202. The pulling plate 203 is hinged to both sides of the moving block 202. A clamping plate 204 is connected to the other side of each pulling plate 203. The clamping plate 204 is slidably connected to the slide groove 209 on the rear side of the housing 1, so that the clamping plate 204 can move stably along the slide groove 209.

[0030] In actual clamping operation, when the controller 25 activates the electric telescopic rod 201 to retract it, the electric telescopic rod 201 will drive the moving block 202 to move closer to the bottom of the box 1. As the moving block 202 moves, the two pull plates 203 on both sides will be pulled synchronously, thereby driving the two clamping plates 204 connected to the pull plates 203 to move closer to each other along the slide groove 209, gradually approaching the container to be tested and finally achieving clamping.

[0031] Furthermore, to accommodate containers of different shapes to be tested, a plurality of holes 205 are provided on one side of the clamping plate 204. A buffer post 206 is slidably installed in each hole 205. The outer end of the buffer post 206 is connected to the buffer flexible plate 208, while the inner end of the buffer post 206 is elastically connected to the clamping plate 204 through a spring 207.

[0032] When the flexible buffer plate 208 contacts the outer wall of the container to be tested, the buffer posts 206 at different positions are compressed to varying degrees according to the shape differences of the container's outer wall, and then contract into the hole 205. This allows the flexible buffer plate 208 to adaptively conform to the outer contour of the container, ensuring the tightness and stability of the clamping. At the same time, the spring 207 will undergo elastic deformation due to the contraction of the buffer posts 206. When the clamping is released, the elastic restoring force of the spring 207 will push the buffer posts 206 back to their original position, preparing for the next clamping operation and preventing inaccurate test data due to movement.

[0033] Secondly, there is a vacuum mechanism, which is used to create a negative pressure inside the container to be tested and maintain the set pressure value, providing a pressure environment that meets the requirements for airtightness testing.

[0034] The vacuuming mechanism includes a linear drive assembly, a rubber cylinder 8, and a vacuum cylinder 10. The linear drive assembly includes a servo motor 4, a gear 5, a rack plate 6, and a moving column 7. The servo motor 4 is located at the top of the housing and is electrically connected to the controller 25. The controller 25 precisely controls the operating status of the servo motor 4.

[0035] The output end of the servo motor 4 is connected to the gear 5. The outer side of the gear 5 is meshed with the rack plate 6. The rack plate 6 passes through the top opening of the housing 1 and is connected to the movable column 7. The rubber cylinder 8 is connected to the bottom of the movable column 7. The aforementioned pressure sensor 9 is set on the rubber cylinder 8 to detect the pressure inside the container to be tested in real time.

[0036] The suction cylinder 10 is connected to the top of the inside of the housing 1. The rubber cylinder 8 and the suction cylinder 10 form a sliding seal fit. The linear drive assembly can drive the rubber cylinder 8 to make linear reciprocating motion inside the suction cylinder 9.

[0037] Furthermore, a fixed cylinder 17 is connected to the outer wall of the suction cylinder 10. Fixed blocks 16 are provided on both sides of the fixed cylinder 17, and the fixed blocks 16 are connected to the inner wall of the box 1. The fixed cylinder 17 can make the installation of the suction cylinder 10 more stable and ensure that it will not shake during the suction process.

[0038] During the vacuuming operation, the controller 25 starts the servo motor 4, which drives the gear 5 to rotate. Since the gear 5 meshes with the rack plate 6, the rotation of the gear 5 is converted into the linear motion of the rack plate 6, which in turn drives the moving column 7 and the rubber cylinder 8 to move inside the vacuum cylinder 10.

[0039] When the rubber cylinder 8 moves upward, it draws air out of the container under test through the suction cylinder 10, creating a negative pressure inside the container. The pressure sensor 9 monitors the internal pressure of the container in real time. When the pressure reaches the set value, the controller 25 controls the servo motor 4 to stop running to maintain stable pressure inside the container.

[0040] Furthermore, there is an airtight mechanism, connected to the downstream end of the vacuuming mechanism. It can be inserted into the injection port of the container to be tested and can extend and retract radially to form a sealed connection with the inner wall of injection ports of different diameters, ensuring airtightness during the vacuuming and pressure maintenance process.

[0041] The airtight mechanism includes a hollow cylinder 11, a movable cylinder 12, a rotating plate 13, a support plate 14, and a conical sealing cloth 15. The hollow cylinder 11 is connected to the bottom of the suction cylinder 10 for inserting the container to be tested into the injection port. The movable cylinder 12 is slidably connected to the outer wall of the hollow cylinder 11. The rotating plate 13 is movably connected to one end of the movable cylinder 12, and the support plate 14 is movably connected to the other end. The rotating plate 13 and the support plate 14 are movably connected. The outer wall of the support plate 14 is provided with a conical sealing cloth 15. The conical sealing cloth 15 is a flexible sealing cloth with good sealing performance.

[0042] Based on the above structure, the movable cylinder 12 can slide axially along the outer wall of the hollow cylinder 11, and the linear motion is converted into the radial extension and retraction motion of the support plate 14 by the rotating plate 13, so as to drive the conical sealing cloth 15 to expand or retract synchronously.

[0043] The detection process of this utility model's pressure vessel leakage pre-inspection device is as follows: First, place the container to be tested inside the box 1. Then, insert the hollow cylinder 11 into the injection port of the container, and ensure that the conical sealing cloth 15 completely passes through the injection port and is placed inside the container to ensure the subsequent sealing effect. Next, the moving cylinder 12 is moved downwards, which drives the rotating plate 13 to move, thereby causing the support plate 14 to expand radially. As the support plate 14 expands radially, the conical sealing cloth 15 gradually unfolds, sealing the injection port of the container with its excellent sealing performance. If the container has other connection ports, sealing materials such as rubber plugs should be used to seal them to avoid affecting the accuracy of the test results. Then, the servo motor 4 is started. Under the meshing transmission of the gear 5 and the rack plate 6, the rack plate 6, the moving column 7 and the rubber cylinder 8 move towards the top inside the suction cylinder 10 to extract the air inside the container. During this process, the pressure sensor 9 measures the pressure value inside the container in real time. When the preset pressure threshold is reached, the servo motor 4 automatically stops running. Maintain this state for one minute. If the value of pressure sensor 9 remains unchanged, it indicates that the container is not leaking; if the value drops slightly, it indicates that the container is slowly leaking. After the test is completed, the servo motor 4 is restarted to rotate in the opposite direction, so that the air pressure inside the container is restored to the initial state. Then, the moving cylinder 12 is moved upward to retract the conical sealing cloth 15 so that the container can be removed from the test device.

[0044] The beneficial effects of this pre-inspection device for pressure vessel leakage are: It can adaptively clamp containers of different shapes and sizes, and the stable clamping ensures stable detection, making it more widely applicable; The airtight seal is reliable, avoiding air leakage during vacuuming or pressure maintenance, reducing detection errors and improving detection accuracy; Through automated control, the pressure can be precisely adjusted and maintained, improving detection accuracy. With a stable structure, extended service life, and enhanced practical performance, it can efficiently complete leak detection of different types of pressure vessels.

[0045] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A pre-inspection device for pressure vessel leakage, characterized in that, include: The enclosure, whose internal space constitutes the testing chamber; A clamping mechanism for adaptively clamping and securing the container to be tested; The vacuum mechanism is used to create a negative pressure inside the container to be tested and maintain the set pressure value. An airtight mechanism, connected to the downstream end of the vacuum mechanism, can be inserted into the injection port of the container to be tested and can extend and retract radially to form a sealed connection with the inner wall of injection ports of different diameters. Pressure sensor, used to detect the pressure inside the container under test in real time; The controller is electrically connected to the vacuuming mechanism, the clamping mechanism, and the pressure sensor, and is used to receive feedback signals from the pressure sensor and determine whether the container to be tested is leaking based on the feedback signals.

2. The pressure vessel leakage pre-inspection device according to claim 1, characterized in that, The front of the enclosure is rotatably connected to a safety door, and the surface of the safety door is provided with an observation window and a display screen, which is electrically connected to the controller.

3. The pressure vessel leakage pre-inspection device according to claim 2, characterized in that, The safety door has a handle on one side, and the handle is fitted with an anti-slip sleeve.

4. The pressure vessel leakage pre-inspection device according to claim 1, characterized in that, An alarm is connected to the top of the enclosure, and horns are provided on both sides of the alarm. The alarm is electrically connected to the controller.

5. The pressure vessel leakage pre-inspection device according to claim 1, characterized in that, The clamping mechanism includes an electric telescopic rod, a moving block, and a pulling plate. The electric telescopic rod is electrically connected to the controller. The telescopic end of the electric telescopic rod is connected to the moving block. The pulling plate is hinged to both sides of the moving block. Each pulling plate has a clamping plate connected to the other side. The clamping plate is slidably connected to the sliding groove on the rear side of the box. The clamping plate has multiple holes on one side, and a buffer column is slidably installed in the hole. The outer end of the buffer column is connected to a flexible buffer plate, and the inner end of the buffer column is elastically connected to the clamping plate via a spring.

6. The pressure vessel leakage pre-inspection device according to claim 1, characterized in that, The vacuuming mechanism includes a linear drive assembly, a rubber cylinder, and a vacuum cylinder. The rubber cylinder and the vacuum cylinder form a sliding seal fit. The linear drive assembly can drive the rubber cylinder to make linear reciprocating motion inside the vacuum cylinder.

7. The pressure vessel leakage pre-detection device according to claim 6, characterized in that, The linear drive assembly includes a servo motor, a gear, a rack plate, and a moving column. The servo motor is electrically connected to the controller. The output end of the servo motor is connected to the gear. The outer side of the gear is meshed with the rack plate. The rack plate passes through the top opening of the housing and is connected to the moving column. The rubber cylinder is connected to the bottom of the moving column.

8. The pressure vessel leakage pre-inspection device according to claim 1, characterized in that, A fixed cylinder is connected to the outer wall of the suction cylinder. The fixed cylinder has fixing blocks on both sides and is connected to the inner wall of the box through the fixing blocks.

9. The pressure vessel leakage pre-inspection device according to claim 1, characterized in that, The airtight mechanism includes a hollow cylinder, a movable cylinder, a rotating plate, a support plate, and a conical sealing cloth. The hollow cylinder is connected to the bottom of the vacuum cylinder for inserting the container to be tested into the injection port. A movable cylinder is slidably connected to the outer wall of the hollow cylinder. A rotating plate is movably connected to one end of the movable cylinder, and a support plate is movably connected to the other end. The rotating plate and the support plate are movably connected. A conical sealing cloth is provided on the outer wall of the support plate. The conical sealing cloth is a flexible sealing cloth.

10. The pressure vessel leakage pre-inspection device according to claim 9, characterized in that, The movable cylinder slides axially along the outer wall of the hollow cylinder, and the linear motion is converted into the radial extension and retraction motion of the support plate by the rotating plate, so as to drive the conical sealing cloth to expand or retract synchronously.

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