Leakage detection device for pressure container

Abstract

The utility model discloses a leak detection device for a pressure vessel. The leak detection device comprises a piston and a first scale rod. According to the leak detection device for the pressure vessel, a piston is slidably connected in a branch pipe, a spring is fixedly connected to the bottom surface of the piston, an adjusting sheet slidably connected with the branch pipe is fixedly connected to the bottom end of the spring, pressure relief holes are symmetrically formed in the middle of the branch pipe, and a first scale rod is fixedly connected to the bottom surface of the piston; the inflator pump inflates and pressurizes the pressure container through the air pipe, the quick-inserting pipe connector and the injection pipe, in the pressurizing process, air pressure compresses the piston to extrude the spring so as to slide in the branch pipe till the piston is flush with the pressure relief hole, and the stop valve is closed to keep the air pressure in the pressure container fixed. When leakage occurs, a difference value occurs between the elastic force of the spring borne by the piston and the gas extrusion force, so that the movement of the piston is matched with the first scale rod to observe the movement amount, whether the pressure container leaks or not can be effectively judged, and misjudgment caused by trace gas leakage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure vessel detection, in particular to a leakage detection device for a pressure vessel. Background Art

[0002] A pressure vessel is a sealed container that can withstand pressure. Pressure vessels have a wide range of uses and play an important role in many sectors, including industry, civil industry, and military industry, as well as in many fields of scientific research. The chemical and petrochemical industries are the most commonly used, with pressure vessels used in the petrochemical industry alone accounting for approximately 50% of all pressure vessels. In the chemical and petrochemical fields, pressure vessels are primarily used for heat transfer, mass transfer, reaction processes, and for the storage and transportation of pressurized gases or liquefied gases. They are also widely used in other industrial and civil fields, such as air compressors. Various types of specialized compressors and auxiliary equipment for refrigeration compressors (coolers, buffers, oil-water separators, gas storage tanks, evaporators, liquid coolant storage tanks, etc.) are all pressure vessels.

[0003] The patent document with the announcement number CN218674136U discloses a leak detection device for a pressure vessel, comprising a pressure tank, a tank opening fixedly mounted on one side of the surface of the pressure tank, a bottom plate fixedly connected to the bottom of the pressure tank, a blocking airbag provided inside the tank opening, a catheter installed on the surface of the blocking airbag, a mounting sleeve fixedly mounted on one end of the catheter, and a pressure relief valve provided on the surface of the mounting sleeve. In the present utility model, by providing a pressurized tube, a blocking airbag, a catheter, a mounting sleeve, a pressure relief valve, an inflatable airbag, an inflatable pump, a mounting shell, a spring, a piston and an opening, it is convenient to detect whether the pressure vessel has leaks. With the cooperation of the blocking airbag, the catheter, the mounting sleeve, the pressure relief valve and the inflatable airbag, pressure vessels of different sizes can be detected. At the same time, the device does not need to manually apply a pressure source, thereby improving safety during detection and being more practical.

[0004] Although the above-mentioned prior art can detect leaks in pressure vessels, when a partial leak occurs in the pressure vessel during use, the piston will be pushed during the pressurization process of the pressure vessel, which may easily lead to misjudgment. Therefore, a leak detection device for pressure vessels is proposed to optimize the above-mentioned prior art. Utility Model Content

[0005] The purpose of the present utility model is to provide a leak detection device for a pressure vessel to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A leak detection device for a pressure vessel comprises a sealing plate arranged on the outside of the pressure vessel port, wherein the sealing plate is provided with a tensioning and fixing mechanism, an injection pipe is fixedly connected to the sealing plate, the end of the injection pipe is connected to the air pipe via a quick-plug joint, the quick-plug joint adopts a product currently on the market, the air pipe is connected to the inflation pump, a stop valve is installed at the tail end of the injection pipe, a branch pipe is fixedly connected to the injection pipe, the bottom end of the branch pipe is fixedly connected to the cover plate by bolts, a retaining ring is fixedly connected to the top inner side of the branch pipe, a piston is slidably connected to the branch pipe, the piston and the branch pipe are slidably sealed, a spring is fixedly connected to the bottom surface of the piston, the bottom end of the spring is fixedly connected to an adjusting plate slidably connected to the branch pipe, a pressure relief hole is symmetrically opened in the middle of the branch pipe, a first scale rod is fixedly connected to the bottom surface of the piston, the first scale rod slides through the adjusting plate and the cover plate at the same time, and circular holes for the first scale rod to pass through and slide are opened on the adjusting plate and the cover plate.

[0008] As a further solution of the present invention: a threaded handle is rotatably installed on the cover plate, the threaded handle is inserted into the branch pipe and the thread passes through the adjusting plate, a threaded hole for threaded connection of the threaded handle is provided on the adjusting plate, a second scale rod is fixedly connected to the bottom surface of the adjusting plate, the second scale rod slides through the cover plate, and a circular hole for the second scale rod to pass through and slide is provided on the cover plate.

[0009] As a further solution of the present invention: the tensioning and fixing mechanism includes a U-shaped frame, the U-shaped frame is fixedly connected to one side of the sealing plate, and a sealing gasket is fixedly connected to the other side of the sealing plate, and the sealing gasket is pressed on the port of the pressure vessel.

[0010] As a further solution of the present invention: a threaded sleeve is rotatably connected to the U-shaped frame, a threaded rod is internally threadedly connected to the threaded sleeve, and a turntable is fixedly connected to the outer side of the threaded sleeve.

[0011] As a further solution of the present invention: one end of the threaded rod close to the sealing plate is fixedly connected to a rectangular connecting rod, the rectangular connecting rod slides through the sealing plate, and the sealing plate and the rectangular connecting rod slide and seal.

[0012] As a further solution of the present invention: an installation cavity is provided at the end of the rectangular connecting rod, a pin is fixedly connected in the installation cavity, a gear rod is rotatably connected to the outer side of the pin, a cam is fixedly connected to the outer side of the pin, a limiting groove is provided at the gear rod corresponding to the cam, and the cooperation between the limiting groove and the cam limits the rotation angle of the gear rod on the pin, a torsion spring is provided on the outer side of the pin, one end of the torsion spring is fixedly connected to the gear rod, and the other end of the torsion spring is fixedly connected to the pin.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. In the utility model, the air pump inflates and pressurizes the pressure vessel through the air pipe, the quick-insert pipe joint and the injection pipe. During the pressurization process, the gas pressure compresses the piston to squeeze the spring, causing it to slide in the branch pipe until the piston is flush with the pressure relief hole. The stop valve is closed to maintain the internal air pressure of the pressure vessel fixed. When leakage occurs, there is a difference between the spring force exerted on the piston and the gas squeezing force, causing the piston to move in conjunction with the first scale rod to observe the movement amount, thereby effectively judging whether the pressure vessel is leaking and avoiding the occurrence of misjudgment due to trace leakage.

[0015] 2. The present invention rotates the threaded handle in conjunction with the guide drive of the first and second scale rods to slide the adjustment plate in the branch pipe, thereby cooperating with the second scale rod to control the compression amount of the spring, thereby adjusting the ultimate air pressure when the pressure vessel is inflated.

[0016] 3. The shift rod of the utility model can be rotated at the end of the rectangular connecting rod so that it can overlap, which is convenient for insertion into the port of the pressure vessel. After insertion, the shift rod can automatically reset to form a vertical effect. The threaded sleeve is rotated by the turntable, thereby driving the threaded rod to move under the guidance of the rectangular connecting rod, and then the rectangular connecting rod can be pulled outward, so that the stopper can be pressed against the inner wall of the port of the pressure vessel, forming a tensioning effect with the sealing plate, and cooperating with the sealing gasket for sealing, so that the device is connected to the pressure vessel and the pressure vessel is closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a structural schematic diagram of a leak detection device for a pressure vessel.

[0018] Figure 2 This is an enlarged view of A in a leak detection device for pressure vessels.

[0019] Figure 3 This is a diagram showing an injection pipe in a leak detection device for a pressure vessel.

[0020] In the figure: 1. Pressure vessel; 2. Closing plate; 3. Injection pipe; 4. Quick-connect fitting; 5. Air pipe; 6. Air pump; 7. Branch pipe; 8. Cover plate; 9. Retaining ring; 10. Piston; 11. Adjusting plate; 12. Pressure relief hole; 13. Threaded handle; 14. Second scale rod; 15. Sealing gasket; 16. U-shaped frame; 17. Threaded sleeve; 18. Threaded rod; 19. Turntable; 20. Rectangular connecting rod; 21. Pin; 22. Gear lever; 23. Key; 24. Limiting groove; 25. Torsion spring; 26. Spring; 27. First scale rod; 28. Stop valve. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figures 1 to 3 In the embodiment of the present invention, a leak detection device for a pressure vessel includes a sealing plate 2 arranged on the outside of a port of a pressure vessel 1, a tensioning and fixing mechanism is installed on the sealing plate 2, an injection pipe 3 is fixedly connected to the sealing plate 2, the end of the injection pipe 3 is connected to an air pipe 5 through a quick-insert pipe joint 4, the quick-insert pipe joint 4 adopts an existing product on the market, the air pipe 5 is connected to an air pump 6, the air pump 6 is externally connected to a power supply and a switch, a stop valve 28 is installed at the tail end of the injection pipe 3, a branch pipe 7 is fixedly connected to the injection pipe 3, the bottom end of the branch pipe 7 is fixedly connected to a cover plate 8 by bolts, and the top inner side of the branch pipe 7 A retaining ring 9 is fixedly connected, and the retaining ring 9 is set to limit the initial state of the piston 10. The piston 10 is slidably connected in the branch pipe 7, and the piston 10 and the branch pipe 7 are slidingly sealed. The bottom surface of the piston 10 is fixedly connected to a spring 26, and the bottom end of the spring 26 is fixedly connected to an adjusting piece 11 slidably connected to the branch pipe 7. A pressure relief hole 12 is symmetrically opened in the middle of the branch pipe 7. A first scale rod 27 is fixedly connected to the bottom surface of the piston 10, and the first scale rod 27 slides through the adjusting piece 11 and the cover plate 8 at the same time. The adjusting piece 11 and the cover plate 8 are provided with a circular hole for the first scale rod 27 to pass through and slide.

[0023] The air pump 6 inflates and pressurizes the pressure vessel 1 through the air pipe 5, the quick-connect pipe connector 4 and the injection pipe 3. During the pressurization process, the gas pressure compresses the piston 10 and squeezes the spring 26, causing it to slide in the branch pipe 7 until the piston 10 is flush with the pressure relief hole 12. The stop valve 28 is closed to maintain the internal air pressure of the pressure vessel 1 fixed. When a leak occurs, there is a difference between the elastic force of the spring 26 on the piston 10 and the gas squeezing force, causing the piston 10 to move and cooperate with the first scale rod 27 to observe the amount of movement, thereby effectively judging whether the pressure vessel is leaking and avoiding the occurrence of misjudgment due to trace leaks.

[0024] By setting the quick-insert pipe connector 4, the air pipe 5 and the injection pipe 3 form an assembled connection, and the air pump 6 can be easily removed and connected to other devices to inflate other pressure vessels that need to be tested.

[0025] A threaded handle 13 is rotatably mounted on the cover plate 8. The threaded handle 13 is inserted into the branch pipe 7 and the thread passes through the adjusting piece 11. The adjusting piece 11 is provided with a threaded hole for the threaded connection of the threaded handle 13. A second scale rod 14 is fixedly connected to the bottom surface of the adjusting piece 11. The second scale rod 14 slides through the cover plate 8. The cover plate 8 is provided with a circular hole for the second scale rod 14 to pass through and slide.

[0026] By rotating the threaded handle 13, the guide driving adjustment piece 11 of the first scale rod 27 and the second scale rod 14 slides in the branch pipe 7, thereby cooperating with the second scale rod 14 to control the compression amount of the spring 26, thereby adjusting the ultimate air pressure when the pressure vessel is inflated.

[0027] The tensioning and fixing mechanism includes a U-shaped frame 16 , which is fixedly connected to one side of the sealing plate 2 . A sealing gasket 15 is fixedly connected to the other side of the sealing plate 2 , and the sealing gasket 15 is pressed on the port of the pressure vessel 1 .

[0028] A threaded sleeve 17 is rotatably connected to the U-shaped frame 16 , a threaded rod 18 is internally threadedly connected to the threaded sleeve 17 , and a turntable 19 is fixedly connected to the outer side of the threaded sleeve 17 .

[0029] One end of the threaded rod 18 close to the sealing plate 2 is fixedly connected to a rectangular connecting rod 20 , and the rectangular connecting rod 20 slides through the sealing plate 2 , and the sealing plate 2 and the rectangular connecting rod 20 slide and seal.

[0030] The end of the rectangular connecting rod 20 is provided with an installation cavity, in which a pin shaft 21 is fixedly connected. The outer side of the pin shaft 21 is rotatably connected to the gear rod 22, and the outer side of the pin shaft 21 is fixedly connected to a convex key 23. A limiting groove 24 is provided at the gear rod 22 corresponding to the convex key 23. The cooperation between the limiting groove 24 and the convex key 23 limits the rotation angle of the gear rod 22 on the pin shaft 21, so that the gear rod 22 can rotate 90°, and under the action of the torsion spring 25, the gear rod 22 remains perpendicular to the rectangular connecting rod 20. A torsion spring 25 is sleeved on the outer side of the pin shaft 21, one end of the torsion spring 25 is fixedly connected to the gear rod 22, and the other end of the torsion spring 25 is fixedly connected to the pin shaft 21.

[0031] The stop rod 22 can be rotated at the end of the rectangular connecting rod 20 so that it can overlap, which is convenient for insertion into the port of the pressure vessel 1. After insertion, the stop rod 22 can automatically reset to form a vertical effect. The threaded sleeve 17 is rotated by the turntable 19, thereby driving the threaded rod 18 to move under the guidance of the rectangular connecting rod 20, and then the rectangular connecting rod 20 can be pulled outward, so that the stopper 22 can be pressed against the inner wall of the port of the pressure vessel 1, forming a tensioning effect with the sealing plate 2, and cooperating with the sealing gasket 15 for sealing, so that the device is connected to the pressure vessel 1 and the pressure vessel 1 is closed.

[0032] The working principle of this utility model is:

[0033] When in use, the lever 22 is rotated into the mounting cavity at the end of the rectangular connecting rod 20. At this time, the rectangular connecting rod 20 is inserted into the port of the pressure vessel 1. At this time, the lever 22 is reset and rotated under the action of the torsion spring 25, and the rotation angle is limited by the cooperation of the convex key 23 and the limit groove 24, so that the lever 22 is perpendicular to the rectangular connecting rod 20, and the sealing plate 2 drives the sealing gasket 15 to fit with the port of the pressure vessel 1. At this time, the threaded sleeve 17 is rotated by the turntable 19, and the threaded rod 18 is pulled down under the guide cooperation of the rectangular connecting rod 20. Move the rectangular connecting rod 20, so that the gear rod 22 fits the port of the pressure vessel 1 and tensions the sealing plate 2, so that the sealing gasket 15 fits tightly with the port of the pressure vessel 1. At this time, rotate the threaded handle 13, and cooperate with the first scale rod 27 and the second scale rod 14 to drive the adjustment piece 11 to slide in the branch pipe 7, thereby cooperating with the second scale rod 14, thereby controlling the compression amount of the spring 26, thereby adjusting the ultimate air pressure when the pressure vessel 1 is inflated. At this time, connect the air pipe 5 to the injection pipe 3 through the quick-insert pipe connector 4, and further through the inflation The pump 6 is inflated. During the pressurization process, the gas pressure compresses the piston 10 and squeezes the spring 26, causing it to slide in the branch pipe 7 until the piston 10 is flush with the pressure relief hole 12. The excess gas is discharged through the pressure relief hole 12 to prevent continuous inflation from causing the internal pressure of the pressure vessel 1 to exceed the standard. The stop valve 28 is closed to maintain the internal sealing of the pressure vessel 1, so that the air pressure is fixed. At this time, the inflation pump 6 is turned off and the quick-connect pipe connector 4 is disassembled. When a leak occurs, the elastic force of the spring 26 on the piston 10 and the gas squeezing force differ, causing the piston 10 to move and cooperate with the first scale rod 27 to observe the movement amount, so that it is possible to effectively judge whether the pressure vessel 1 is leaking. After the detection is completed, the stop valve 28 is opened to exhaust. After the exhaust is completed, the turntable 19 is rotated in the opposite direction. At this time, the rectangular connecting rod 20 is driven to be inserted into the pressure vessel 1, so that a gap is formed between the sealing plate 2 and the port of the pressure vessel 1. The arm is extended into the port of the pressure vessel 1 through the gap. At this time, the gear lever 22 can be rotated into the mounting cavity at the end of the rectangular connecting rod 20, so as to facilitate the rectangular connecting rod 20 to be pulled out of the pressure vessel 1.

[0034] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A leak detection device for a pressure vessel, comprising a sealing plate (2) arranged outside a port of a pressure vessel (1), characterized in that: The sealing plate (2) is provided with a tensioning and fixing mechanism, an injection pipe (3) is fixedly connected to the sealing plate (2), the end of the injection pipe (3) is connected to an air pipe (5) via a quick-insert pipe joint (4), the air pipe (5) is connected to an air pump (6), a stop valve (28) is provided at the tail end of the injection pipe (3), a branch pipe (7) is fixedly connected to the injection pipe (3), the bottom end of the branch pipe (7) is fixedly connected to a cover plate (8) via bolts, and the top inner side of the branch pipe (7) is fixed. A retaining ring (9) is connected, a piston (10) is slidably connected in the branch pipe (7), a spring (26) is fixedly connected to the bottom surface of the piston (10), an adjusting plate (11) slidably connected to the branch pipe (7) is fixedly connected to the bottom end of the spring (26), a pressure relief hole (12) is symmetrically opened in the middle of the branch pipe (7), a first scale rod (27) is fixedly connected to the bottom surface of the piston (10), and the first scale rod (27) slides through the adjusting plate (11) and the cover plate (8) at the same time.

2. A leak detection device for a pressure vessel according to claim 1, characterized in that: A threaded handle (13) is rotatably mounted on the cover plate (8), the threaded handle (13) is inserted into the branch pipe (7) and the thread passes through the adjustment piece (11), the bottom surface of the adjustment piece (11) is fixedly connected to a second scale rod (14), and the second scale rod (14) slides through the cover plate (8).

3. The pressure vessel leak detection device according to claim 1, characterized in that: The tensioning and fixing mechanism comprises a U-shaped frame (16), the U-shaped frame (16) is fixedly connected to one side of the sealing plate (2), and a sealing gasket (15) is fixedly connected to the other side of the sealing plate (2), and the sealing gasket (15) is pressed on the port of the pressure vessel (1).

4. A leak detection device for a pressure vessel according to claim 3, characterized in that: A threaded sleeve (17) is rotatably connected to the U-shaped frame (16), a threaded rod (18) is internally threadedly connected to the threaded sleeve (17), and a rotating disk (19) is fixedly connected to the outer side of the threaded sleeve (17).

5. A leak detection device for a pressure vessel according to claim 4, characterized in that: One end of the threaded rod (18) close to the sealing plate (2) is fixedly connected to a rectangular connecting rod (20), and the rectangular connecting rod (20) slides through the sealing plate (2).

6. A leak detection device for a pressure vessel according to claim 5, characterized in that: The end of the rectangular connecting rod (20) is provided with a mounting cavity, a pin shaft (21) is fixedly connected in the mounting cavity, a shift lever (22) is rotatably connected to the outer side of the pin shaft (21), a convex key (23) is fixedly connected to the outer side of the pin shaft (21), a limiting groove (24) is provided at the shift lever (22) corresponding to the convex key (23), a torsion spring (25) is sleeved on the outer side of the pin shaft (21), one end of the torsion spring (25) is fixedly connected to the shift lever (22), and the other end of the torsion spring (25) is fixedly connected to the pin shaft (21).

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