A pressure vessel air tightness testing device

Abstract

This application discloses a pressure vessel airtightness testing device, relating to the field of airtightness testing technology. The application includes a testing mechanism comprising an annular cover with an annular groove on its inner circumference. A connecting plate is vertically slidably inserted into the top of the annular cover. One end of the connecting plate is located inside the annular cover and has a sealing ring plate. An annular water storage cavity is formed between the sealing ring plate and the annular groove. The sealing ring plate is fitted onto the container tank. By fitting the annular cover onto the container tank and moving the sealing ring plate upwards during testing to allow water to flood the weld seam, this application eliminates the need for repeatedly moving the container tank. Compared to inspecting the weld seam in a water tank, testing personnel can directly observe the weld seam of the container tank at close range through the annular cover, making testing more convenient. Furthermore, the weld seam is completely immersed in water, reducing the likelihood of uneven spraying and evaporation problems, making it more convenient to use.

Description

Technical Field

[0001] The present application relates to the technical field of air tightness detection, and in particular to an air tightness testing device for a pressure vessel. Background Art

[0002] Existing high-pressure gas cylinders need to be tested for air tightness during the production process to ensure safety after refilling with gas. Commonly used high-pressure gas cylinders are generally cylindrical in shape, and the bottle mouth is connected to the bottle body through a welding process. The opening of the bottle mouth is a flange to facilitate the sealing of the high-pressure gas cylinder in the future. When testing high-pressure gas cylinders, the prior art generally involves installing a testing flange on the flange at the bottle mouth, connecting the testing flange to an air inlet pipe for conveying dry air into the bottle mouth, and then immersing the high-pressure gas cylinder in water. Then, whether bubbles are generated at the weld is determined to determine whether the high-pressure gas cylinder is qualified. However, this testing method is inconvenient to use. When air tightness tests are required for multiple high-pressure gas cylinders, the high-pressure gas cylinders need to be repeatedly moved into water. Although the prior art includes directly spraying soapy water on the weld to observe whether there are bubbles in the weld, this method is prone to uneven spraying, volatility, and omissions when used. However, completely immersing the bottle body in the water tank is not conducive to close observation by the inspectors, and it is not convenient to check whether bubbles are generated at the weld.

[0003] Therefore, the present invention provides a pressure vessel air tightness testing device. Summary of the invention

[0004] The purpose of this application is to solve the problems in the above-mentioned background technology, and provide a pressure vessel air tightness testing device.

[0005] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions:

[0006] A pressure vessel air tightness testing device, comprising:

[0007] The detection mechanism comprises an annular cover, an annular groove is formed on the inner circumference of the annular cover, a connecting plate is vertically slidably inserted on the top of the annular cover, one end of the connecting plate is located in the annular cover and is configured with a sealing ring plate, an annular water storage cavity is formed between the sealing ring plate and the annular groove, and the sealing ring plate is sleeved on the container tank;

[0008] A sealing mechanism, wherein an annular installation groove is provided on the inner circumference of the annular cover and below the water storage chamber, and a sealing member is installed in the installation groove;

[0009] A docking mechanism is installed at the flange of the container tank, a driving pipe is installed on the docking mechanism, the bottom end of the driving pipe is located in the bottle mouth of the container tank, the top end of the driving pipe is connected to a vent pipe, and a valve is installed on the vent pipe;

[0010] An air intake mechanism is installed between the annular cover and the docking mechanism and acts on the drive tube, and is used to provide air pressure into the drive tube;

[0011] The driving mechanism is installed on the annular cover and is used for driving the sealing ring plate to move.

[0012] Furthermore, the docking mechanism includes a placement plate placed on the flange of the container tank, the bottom of the placement plate is coaxially configured with a connecting plate located in the mouth of the container tank, a sealing ring in contact with the inner side of the mouth of the container tank is installed on the connecting plate, a through hole is opened through the top of the placement plate, the driving tube is installed on the placement plate and the bottom passes through the sealing ring, the inner circumference of the sealing ring is fitted with the outer circumference of the driving tube, and a clamping mechanism is installed on the placement plate, and the placement plate can be released or fixed on the flange of the container tank through the clamping mechanism.

[0013] Furthermore, the outer circumference of the driving tube approaches its central axis from bottom to top to form a frustum, the outer circumference of the driving tube is configured with a convex plate, the top of the placement plate is configured with a plurality of guide rods, and the convex plate is slidably sleeved on the plurality of guide rods.

[0014] Furthermore, the clamping mechanism includes a rotating rod rotatably installed in a circular array on the outer peripheral side of the placement plate, the free end of the rotating rod is constructed with an arc-shaped clamping rod, a movable ring plate is vertically slidably installed on the placement plate, and a plurality of hinged rods are hinged on the outer peripheral side of the movable ring plate, and the plurality of hinged rods are respectively hinged on the plurality of rotating rods.

[0015] Furthermore, a sliding cavity is provided on the top of the placement plate, a moving block is slidably installed in the sliding cavity, a connecting rod is constructed on the top of the moving block and passes through the sliding cavity to be connected to the bottom of the moving ring plate, a series pipe connected to multiple sliding cavities is installed on the placement plate, an air intake mechanism is connected to the series pipe, a ventilation groove is vertically provided on the moving block, a second automatic pressure relief valve is installed in the ventilation groove, a plurality of through holes penetrating the connecting rod and the moving block are formed through the top of the moving ring plate, a container frame connected to the multiple through holes is constructed on the top of the moving ring plate, and a connecting pipe is connected between the container frame and one side of the driving pipe.

[0016] Furthermore, an outer ring groove is provided in an annular shape on the outer circumference of the annular cover, a forcing arc plate is rotatably sleeved on the outer ring groove, a top surface of the forcing arc plate is constructed with a forcing inclined surface, the top end of the connecting plate is located outside and is constructed with a connecting boss, a forcing rod is vertically constructed at the bottom of the connecting boss, the bottom end of which contacts the forcing inclined surface, a linkage member acting on the forcing arc plate is installed on the annular cover, the forcing arc plate moves around the axis of the annular cover, and when the air intake mechanism takes air into the series pipe, the forcing arc plate is moved through the linkage member.

[0017] Furthermore, the linkage part includes an arc-shaped sleeve installed on the outside of the annular cover, an arc-shaped sleeve rod is slidably inserted into the arc-shaped sleeve along its length direction, one end of the arc-shaped sleeve rod located on the outside is connected to the forced arc plate, and one end of the arc-shaped sleeve rod located inside the arc-shaped sleeve is constructed with a piston block that fits with its inner circumference, a ventilation pipe is connected between the arc-shaped sleeve and the series pipe, and a butt pipe is connected to the side of the arc-shaped sleeve away from the free end of the arc-shaped sleeve rod, and the air intake mechanism is connected to the butt pipe.

[0018] Furthermore, the sealing member is a rubber ring which is hollow inside and in an annular shape, the air intake mechanism comprises an air intake pipe mounted on an annular cover, the outer peripheral side of the rubber ring away from the axis thereof is fixedly mounted on a mounting groove, and one end of the air intake pipe passes through the mounting groove and is connected to the interior of the rubber ring, an air outlet pipe connected to the rubber ring is mounted on the annular cover, a first automatic pressure relief valve is mounted on the air outlet pipe, and the air relief port of the first automatic pressure relief valve is connected to a docking pipe.

[0019] Furthermore, a sleeve is installed on the placement plate, a wedge plate is slidably installed on one end of the sleeve, a plurality of wedge grooves for inserting the inclined surface of the wedge plate are vertically opened on the outer side of the connecting rod, and a spring is installed between the wedge plate and the sleeve.

[0020] Furthermore, a clamping groove is provided in an annular manner along the edge of the bottom end of the annular groove, an annular flange is constructed on the outer peripheral side of the sealing ring plate, a sealing groove is provided in an annular manner on the outer peripheral side of the annular flange, and a sealing gasket is installed in the sealing groove.

[0021] The beneficial effects of this application are as follows:

[0022] Compared with the existing ones, the present application sets an annular cover on the container tank, and moves the sealing ring plate upwards to achieve water overflowing the weld during inspection. Not only does it not need to carry the container tank back and forth, but also during inspection, compared to checking the weld condition in the water tank, the inspector can directly observe the weld of the container tank from the annular cover at a close distance, which is more convenient during inspection. Moreover, the weld is completely immersed in water, and it is not easy to have problems such as uneven spraying and volatilization, so it is more convenient to use.

[0023] The present application realizes that when high pressure is generated inside the container can being tested, the driving tube will be pushed upward due to the high-pressure gas. When the driving tube moves upward, the outer peripheral side of the driving tube will have increasingly greater resistance against the sealing ring because of its tapered outer peripheral side, thereby squeezing the sealing ring and causing the sealing ring to extend outward, thereby increasing the resistance between the outer peripheral side of the sealing ring and the inside of the container can bottle mouth and further improving the sealing performance.

[0024] When the air is transported into the series pipe by the air intake mechanism of the present application, the movement of the arc plate is forced through the linkage part. The movement of the arc plate causes the forcing inclined surface to move in the direction of the forcing rod, so that the forcing rod is pushed upward by the forcing inclined surface, thereby realizing the upward movement of the connecting flange. As the connecting flange moves upward, the sealing ring plate is indirectly driven to move upward through the connecting plate, thereby realizing automatic upward movement of the sealing ring plate. There is no need for the staff to manually move the sealing ring plate, which is more convenient to use.

[0025] In the present application, after the air pressure enters the air intake pipe, it will first enter the rubber ring, thereby causing the rubber ring to expand, thereby further improving the sealing effect. When a certain air pressure is reached inside the rubber ring, the gas will be discharged into the docking tube through the first automatic pressure relief valve. Therefore, the gas will continue to move only when a certain pressure is reached inside the rubber ring, thereby preventing the water inside the water storage chamber from flowing out and causing infiltration, thereby reducing the possibility of water leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure when used in this application;

[0027] Figure 2 This application Figure 1 Partial stereoscopic cutaway view;

[0028] Figure 3 This application Figure 1 Schematic diagram from another perspective;

[0029] Figure 4 It is a schematic diagram of the three-dimensional structure of this application;

[0030] Figure 5 This application Figure 4 Partial stereoscopic cutaway view;

[0031] Figure 6 This application Figure 3 Another partial stereoscopic cross-sectional view;

[0032] Figure 7 It is an exploded view of some structures of this application;

[0033] Figure 8 This application Figure 2 A magnified view of the structure at center;

[0034] Fig. 9 This application Figure 5 A magnified view of the structure at B in the middle;

[0035] Figure numerals: 1, detection mechanism; 101, annular cover; 102, connecting plate; 103, sealing ring plate; 104, water storage chamber; 105, annular groove; 106, mounting groove; 2, sealing member; 3, docking mechanism; 301, placement plate; 302, connecting plate; 303, sealing ring; 304, perforation; 4, air intake mechanism; 401, air intake pipe; 402, air outlet pipe; 403, first automatic pressure relief valve; 5, driving pipe; 6, air relief pipe; 7, valve; 8, driving mechanism; 801, forcing rod; 802, connecting convex plate; 803, forcing inclined surface; 804, outer ring groove; 805, Force arc plate; 9, clamping mechanism; 901, rotating rod; 902, tightening rod; 903, moving ring disk; 904, hinged rod; 10, convex plate; 11, guide rod; 12, sliding cavity; 13, moving block; 14, connecting rod; 15, series pipe; 16, ventilation groove; 17, annular flange; 18, second automatic pressure relief valve; 19, linkage; 20, arc sleeve; 21, arc sleeve rod; 22, through hole; 23, container frame; 24, connecting pipe; 25, piston block; 26, ventilation pipe; 27, butt pipe; 28, sleeve; 29, wedge plate; 30, wedge groove; 31, clamping groove. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Embodiment 1:

[0037] like Figure 1-Figure 9 As shown, a pressure vessel air tightness testing device proposed in Embodiment 1 of the present application includes:

[0038] The detection mechanism 1 comprises an annular cover 101, an annular groove 105 is provided on the inner circumference of the annular cover 101, a connecting plate 102 is vertically slidably inserted on the top of the annular cover 101, one end of the connecting plate 102 is located in the annular cover 101 and is configured with a sealing ring plate 103, an annular water storage chamber 104 is formed between the sealing ring plate 103 and the annular groove 105, the sealing ring plate 103 is sleeved on the container tank, and the container tank is an existing high-pressure gas cylinder or a pressure container bottle of a similar shape;

[0039] Sealing mechanism, an annular mounting groove 106 is provided on the inner circumference of the annular cover 101 and below the water storage chamber 104, a sealing member 2 is installed in the mounting groove 106, the annular cover 101 is sleeved on the container tank before use, the diameter of the annular cover 101 is consistent with the diameter of the container tank, and there is no visible gap between the annular cover 101 and the container tank under the premise of smooth sleeve installation, in this embodiment, the sealing mechanism can be an existing rubber sealing ring, the sealing ring is located in the mounting groove 106, when the annular cover 101 is sleeved on the container tank After that, the sealing ring contacts the inner circumference of the container tank to play a sealing role. At this time, the weld between the container tank and the bottle mouth is located in the annular cover 101. Then, the driving mechanism 8 moves the sealing ring plate 103 upward, so that the sealing ring plate 103 no longer blocks the opening of the installation groove 106, so that the water in the water storage chamber 104 will directly overflow the weld. Therefore, the design of the sealing mechanism makes it difficult for water to flow out from the bottom of the annular cover 101. It should be noted that the flange of the container tank mouth is located outside the water surface at this time, which is convenient for subsequent connection.

[0040] The docking mechanism 3 is installed at the flange of the container tank. A driving pipe 5 is installed on the docking mechanism 3. The bottom end of the driving pipe 5 is located in the mouth of the container tank. The top end of the driving pipe 5 is connected to a vent pipe 6. A valve 7 is installed on the vent pipe 6. After the water in the water storage chamber 104 overflows the weld of the container tank, the docking mechanism 3 can be installed on the flange of the container tank. The container tank is always in an upright state. The docking mechanism 3 can be an existing flange for detection. The bottom end of the driving pipe 5 passes through the flange for detection and is located in the mouth of the container tank.

[0041] The air intake mechanism 4 is installed between the annular cover 101 and the docking mechanism 3 and acts on the driving tube 5, which is used to provide air pressure to the driving tube 5. The air intake mechanism 4 can be an existing air compressor that provides compressed gas. The air compressor is connected to one side of the driving tube 5 through a pipeline. When there is gas in the driving tube 5, the gas will enter the driving tube 5, thereby applying air pressure to the container tank, so that a certain air pressure is maintained in the container tank. At this time, the inspection personnel can observe the weld at a close distance. If there is a leak, bubbles will appear in the weld. Following the direction of the bubbles, it can be known where the leak occurs. After the inspection, the sealing ring plate 103 is moved downward by the driving mechanism 8. Because the gap between the inner peripheral side of the sealing ring plate 103 and the outer peripheral side of the container tank is very small, when the sealing ring plate 103 When moving downward, most of the water flows into the water storage chamber 104, and only a small amount of water is located outside the water storage chamber 104, so there is no need to frequently inject water into the water storage chamber 104. Preferably, a hole can be opened on the annular cover 101 to facilitate the injection of water into the water storage chamber 104, and the hole can be blocked when not in use. Compared with the existing ones, by putting the annular cover 101 on the container tank, the sealing ring plate 103 is moved upward during inspection to achieve a method of water flooding the weld, not only does it not need to carry the container tank back and forth, but also during inspection, compared with checking the weld condition in the water tank, the inspector can directly observe the weld of the container tank from the annular cover 101 at a close distance, which is more convenient during inspection, and the weld is completely immersed in water, so it is not easy to have problems such as uneven spraying and volatilization, and it is more convenient to use. Embodiment 2:

[0042] like Figure 4 and Figure 8 As shown, this embodiment further improves the present application on the basis of the first embodiment, the bottom of the placement plate 301 is coaxially structured with a connecting plate 302 located in the bottle mouth of the container, and a sealing ring 303 in contact with the inner side of the bottle mouth of the container is installed on the connecting plate 302. A through hole 304 is opened through the top of the placement plate 301, and the driving tube 5 is installed on the placement plate 301 and the bottom passes through the sealing ring 303. The inner circumference of the sealing ring 303 is in contact with the outer circumference of the driving tube 5. The placement plate 301 is installed with a clamping mechanism 9, which is clamped by the clamping mechanism 9. The connection mechanism 9 is used to release the placement plate 301 from being fixed or to fix it on the flange of the container tank, that is, the placement plate 301 is fitted with the flange of the container tank during use. At this time, one end of the driving tube 5 is located in the bottle mouth of the container tank, and the connecting plate 302 is also located in the bottle mouth and the sealing ring 303 is in contact with the bottle mouth, which plays a sealing role. At this time, the clamping mechanism 9 fixes the placement plate 301 on the flange of the container tank, which effectively prevents the placement plate 301 from moving up due to excessive internal pressure of the container tank during detection. Embodiment three:

[0043] like Figure 4 and Figure 8As shown, this embodiment further improves the present application on the basis of the second embodiment. The outer peripheral side of the driving tube 5 approaches the central axis from bottom to top to form a frustum shape. The outer peripheral side of the driving tube 5 is constructed with a convex disk 10. The top of the placing plate 301 is constructed with a plurality of guide rods 11. The convex disk 10 is slidably sleeved on the plurality of guide rods 11. That is to say, when high pressure is generated inside the detected container tank, the driving tube 5 will be pushed up due to the high-pressure gas. When the driving tube 5 moves upward, because the outer peripheral side is tapered, the outer peripheral side of the driving tube 5 will have an increasingly greater resistance force with the sealing ring 303, thereby squeezing the sealing ring 303 so that the sealing ring 303 extends outward, increasing the resistance force between the outer peripheral side of the sealing ring 303 and the inside of the container tank bottle mouth, and further improving the sealing performance. Preferably, the bottom of the connecting plate 302 is constructed with a convex ring with a T-shaped cross section, and the sealing ring 303 is sleeved on the convex ring. That is to say, a groove with a T-shaped cross section is annularly opened on the sealing ring 303 to ensure the firmness of the sealing ring 303 after installation.

[0044] like Figure 8 As shown, in the third embodiment, the clamping mechanism 9 includes a rotating rod 901 rotatably installed in a circular array on the outer peripheral side of the placement plate 301, and the free end of the rotating rod 901 is constructed with an arc-shaped clamping rod 902. A movable ring plate 903 is vertically slidably installed on the placement plate 301, and a plurality of hinged rods 904 are hinged on the outer peripheral side of the movable ring plate 903. The plurality of hinged rods 904 are respectively hinged on the plurality of rotating rods 901, that is, when in use, by moving the movable ring plate 903, the movement of the movable ring plate 903 will drive the movement of the plurality of hinged rods 904. Because one end of the hinged rod 904 is hinged on the rotating rod 901, the movement of the movable ring plate 903 will drive the movement of the plurality of rotating rods 901, so that the plurality of clamping rods 902 are simultaneously pressed against the back side of the flange of the container tank, thereby completing the rapid fixation. In the present embodiment, the movement of the movable ring plate 903 can be driven by an electric push rod or a hydraulic rod. Embodiment 4:

[0045] like Figure 8 and Fig. 9As shown, this embodiment further improves the present application on the basis of the first to third embodiments, a sliding cavity 12 is provided on the top of the placement disk 301, a moving block 13 is slidably installed in the sliding cavity 12, a connecting rod 14 is constructed on the top of the moving block 13 to pass through the sliding cavity 12 and connect with the bottom of the moving ring disk 903, a series pipe 15 connected with multiple sliding cavities 12 is installed on the placement disk 301, the air intake mechanism 4 is connected to the series pipe 15, a ventilation groove 16 is vertically provided on the moving block 13, a second automatic pressure relief valve 18 is installed in the ventilation groove 16, a plurality of through holes 22 penetrating the connecting rod 14 and the moving block 13 are provided on the top of the moving ring disk 903, a container frame 23 connected with the plurality of through holes 22 is constructed on the top of the moving ring disk 903, a connecting pipe 24 is connected between the container frame 23 and one side of the driving pipe 5, and when the air intake mechanism 4 delivers gas to the series pipe 15, the gas will enter the multiple sliding cavities 12 at this time, because the air pressure inside the sliding cavity 12 increases, The air pressure will push the moving block 13 to move downward, and the downward movement of the moving block 13 will indirectly drive the connecting rod 14 to move downward, thereby realizing the movement of the moving ring disk 903, and no additional driving force is needed to drive the movement of the moving ring disk 903. After the clamping rod 902 abuts against the back of the flange of the container tank, as the air pressure gradually increases, the second automatic pressure relief valve 18 begins to relieve pressure after being subjected to sufficient pressure, so that the gas continues to move through the ventilation groove 16. At this time, the gas will flow into the through hole 22 after passing through the ventilation groove 16, and then flow into the container frame 23. Because the container frame 23 and the driving tube 5 are connected through the connecting tube 24, the final gas will still flow into the driving tube 5. In this process, air leakage will occur at the sealing ring 303, but this phenomenon will gradually disappear after the clamping rod 902 abuts against the back of the flange and the air pressure enters the driving tube 5, until the driving tube 5 moves upward and abuts against the sealing ring 303, and then there will be no air leakage. Embodiment five:

[0046] like Figure 5 , Figure 8 and Fig. 9As shown, this embodiment further improves the present application on the basis of the first to fourth embodiments, an outer ring groove 804 is provided in an annular shape on the outer peripheral side of the annular cover 101, a forcing arc plate 805 is rotatably sleeved on the outer ring groove 804, a forcing inclined surface 803 is constructed on the top surface of the forcing arc plate 805, the top end of the connecting plate 102 is located outside and is constructed with a connecting convex plate 802, a forcing rod 801 whose bottom end contacts the forcing inclined surface 803 is vertically constructed at the bottom of the connecting convex plate 802, a linkage member 19 acting on the forcing arc plate 805 is installed on the annular cover 101, and the arc plate 805 is forced to move around the axis of the annular cover 101, and when the air intake mechanism 4 takes air into the series pipe 15, the air intake mechanism 4 is connected to the series pipe 15 through the linkage member 19. The movable member 19 forces the arc plate 805 to move, that is to say, when the air intake mechanism 4 delivers gas into the series pipe 15, the arc plate 805 is forced to move through the linkage member 19. The movement of the arc plate 805 causes the inclined surface 803 to move in the direction of the forcing rod 801, thereby forcing the inclined surface 803 to push the forcing rod 801 upward, thereby realizing the upward movement of the connecting flange 802. As the connecting flange 802 moves upward, the sealing ring plate 103 is indirectly driven to move upward through the connecting plate 102, thereby realizing the automatic upward movement of the sealing ring plate 103, and the staff does not need to manually move the sealing ring plate 103, which is more convenient to use.

[0047] like Figure 4 As shown, in the fifth embodiment, the linkage member 19 includes an arc-shaped sleeve 20 installed on the outside of the annular cover 101, and an arc-shaped sleeve rod 21 is inserted into the arc-shaped sleeve 20 for sliding along its length direction. The end of the arc-shaped sleeve rod 21 located on the outside is connected to the arc-forced plate 805, and the end of the arc-shaped sleeve rod 21 located inside the arc-shaped sleeve 20 is constructed with a piston block 25 that fits with its inner circumference. A vent pipe 26 is connected between the arc-shaped sleeve 20 and the series pipe 15, and a butt pipe 27 is connected to the side of the arc-shaped sleeve 20 away from the free end of the arc-shaped sleeve rod 21, and the air intake mechanism 4 is connected to the butt pipe 27, that is, the air intake The mechanism 4 will first deliver gas to the docking tube 27, thereby pushing the piston block 25 to move through the air pressure. The movement of the piston block 25 indirectly drives the movement of the arc sleeve rod 21. Because one end of the arc sleeve rod 21 is connected to the forced arc plate 805, the movement of the arc sleeve rod 21 will drive the movement of the forced arc plate 805 until the air pressure can flow from the vent pipe 26 to the series pipe 15. Because the air pressure is continuous during the airtightness test, that is, the vent pipe 26 always maintains a certain air pressure, so the forced arc plate 805 will not move accidentally due to the gravity of the sealing ring plate 103.

[0048] like Figure 2 and Figure 4As shown, in the fifth embodiment, the sealing member 2 is a hollow and annular rubber ring, the air intake mechanism 4 includes an air intake pipe 401 mounted on the annular cover 101, the outer peripheral side of the rubber ring away from the axis thereof is fixedly mounted on the mounting groove 106, and one end of the air intake pipe 401 passes through the mounting groove 106 and is connected to the inside of the rubber ring, an air outlet pipe 402 connected to the rubber ring is mounted on the annular cover 101, a first automatic pressure relief valve 403 is mounted on the air outlet pipe 402, and the air discharge port of the first automatic pressure relief valve 403 is connected to the butt joint 27 That is to say, the air compressor is connected to the air inlet pipe 401 to provide air pressure. First, the air pressure enters the air inlet pipe 401 and then enters the rubber ring, thereby causing the rubber ring to expand, thereby further improving the sealing effect. When a certain air pressure is reached inside the rubber ring, the gas will be discharged into the docking pipe 27 through the first automatic pressure relief valve 403. Thus, the gas will continue to flow only when a certain pressure is reached inside the rubber ring, thereby preventing the water inside the water storage chamber 104 from flowing out and causing infiltration, thereby reducing the possibility of water leakage.

[0049] like Figure 8 and Fig. 9 As shown, in embodiment five, a sleeve 28 is installed on the placement plate 301, and a wedge plate 29 is slidably installed on one end of the sleeve 28. A plurality of wedge grooves 30 for inserting the inclined surfaces of the wedge plates 29 are vertically opened on the outer side of the connecting rod 14, and a spring is installed between the wedge plate 29 and the sleeve 28. That is to say, in order to prevent the movable ring plate 903 from accidentally moving downward during use, when the connecting rod 14 moves upward, the inclined surface of the wedge plate 29 contacts the inclined surface of the wedge groove 30, thereby not affecting the upward movement of the connecting rod 14. Once the connecting rod 14 moves downward, the top plane of the wedge plate 29 contacts the plane of the wedge groove 30, thereby playing a limiting role.

[0050] like Figure 5-Figure 8 As shown, in Example 5, a groove 31 is provided in an annular manner along the edge of the bottom end of the annular groove 105, and an annular flange 17 is constructed on the outer peripheral side of the sealing ring plate 103. A sealing groove is provided in an annular manner on the outer peripheral side of the annular flange 17, and a sealing gasket is installed in the sealing groove. The sealing gasket plays a sealing role when the sealing ring plate 103 moves downward, thereby preventing water from flowing out of the sealing cavity. It should be noted that the connecting plate 102 and the annular groove 105 are in a close sliding fit relationship, thereby preventing the connecting plate 102 from moving accidentally, and further preventing the possibility of water leakage inside the water storage cavity 104.

[0051] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pressure vessel air tightness testing device, characterized in that: include: A detection mechanism (1), the detection mechanism (1) comprising an annular cover (101), an annular groove (105) being provided on the inner circumference of the annular cover (101), a connecting plate (102) being vertically slidably inserted on the top of the annular cover (101), one end of the connecting plate (102) being located in the annular cover (101) and being provided with a sealing ring plate (103), an annular water storage chamber (104) being formed between the sealing ring plate (103) and the annular groove (105), and the sealing ring plate (103) being sleeved on the container tank; A sealing mechanism, wherein an annular installation groove (106) is provided on the inner circumference of the annular cover (101) and below the water storage chamber (104), and a sealing member (2) is installed in the installation groove (106); A docking mechanism (3) is mounted on the flange of the container tank, a driving pipe (5) is mounted on the docking mechanism (3), the bottom end of the driving pipe (5) is located in the mouth of the container tank, the top end of the driving pipe (5) is connected to an air release pipe (6), and a valve (7) is mounted on the air release pipe (6); An air intake mechanism (4) is installed between the annular cover (101) and the docking mechanism (3) and acts on the drive tube (5), and is used to provide air pressure into the drive tube (5); A driving mechanism (8) mounted on the annular cover (101) and used for driving the sealing ring plate (103) to move; The docking mechanism (3) comprises a placement plate (301) placed on the flange of the container tank; the placement plate (301) is coaxially provided with a connection plate (302) located inside the mouth of the container tank at the bottom; a sealing ring (303) in contact with the inner side of the mouth of the container tank is installed on the connection plate (302); a through hole (304) is opened through the top of the placement plate (301); the driving tube (5) is installed on the placement plate (301) and passes through the sealing ring (303) at the bottom; the inner circumference of the sealing ring (303) is in contact with the outer circumference of the driving tube (5); and a clamping mechanism (9) is installed on the placement plate (301); the placement plate (301) is released from fixation or fixed to the flange of the container tank by the clamping mechanism (9).

2. A pressure vessel air tightness testing device according to claim 1, characterized in that: The outer peripheral side of the driving tube (5) approaches the central axis from bottom to top to form a cone shape. The outer peripheral side of the driving tube (5) is structured with a convex plate (10). The top of the placement plate (301) is structured with a plurality of guide rods (11). The convex plate (10) is slidably sleeved on the plurality of guide rods (11).

3. A pressure vessel air tightness testing device according to claim 2, characterized in that: The clamping mechanism (9) comprises rotating rods (901) rotatably mounted in a circular array on the outer peripheral side of a placement plate (301); the free ends of the rotating rods (901) are configured with arc-shaped abutting rods (902); a movable ring plate (903) is vertically slidably mounted on the placement plate (301); a plurality of hinged rods (904) are hingedly connected to the outer peripheral side of the movable ring plate (903); and the plurality of hinged rods (904) are respectively hingedly connected to the plurality of rotating rods (901).

4. A pressure vessel air tightness testing device according to claim 3, characterized in that: A sliding cavity (12) is provided at the top of the placement plate (301), a moving block (13) is slidably installed in the sliding cavity (12), a connecting rod (14) is constructed at the top of the moving block (13) and passes through the sliding cavity (12) and is connected to the bottom of the moving ring plate (903), a series pipe (15) connected to a plurality of sliding cavities (12) is installed on the placement plate (301), an air intake mechanism (4) is connected to the series pipe (15), a ventilation groove (16) is vertically provided on the moving block (13), a second automatic pressure relief valve (18) is installed in the ventilation groove (16), a plurality of through holes (22) penetrating the connecting rod (14) and the moving block (13) are provided at the top of the moving ring plate (903), a container frame (23) connected to the plurality of through holes (22) is constructed at the top of the moving ring plate (903), a connecting pipe (24) is connected between the container frame (23) and one side of the driving pipe (5).

5. The pressure vessel air tightness testing device according to claim 1, characterized in that: An outer ring groove (804) is formed in an annular manner on the outer circumference of the annular cover (101). A forcing arc plate (805) is rotatably sleeved on the outer ring groove (804). The top surface of the forcing arc plate (805) is configured with a forcing inclined surface (803). The top end of the connecting plate (102) is located outside and is configured with a connecting flange (802). The bottom of the connecting flange (802) is vertically configured with a forcing rod (801) whose bottom end contacts the forcing inclined surface (803). A linkage member (19) acting on the forcing arc plate (805) is installed on the annular cover (101). The forcing arc plate (805) moves around the axis of the annular cover (101). When the air intake mechanism (4) takes air into the series pipe (15), the forcing arc plate (805) moves through the linkage member (19).

6. A pressure vessel air tightness testing device according to claim 5, characterized in that: The linkage member (19) comprises an arc-shaped sleeve (20) mounted on the outside of the annular cover (101), an arc-shaped sleeve rod (21) is slidably inserted into the arc-shaped sleeve (20) along its length direction, one end of the arc-shaped sleeve rod (21) located outside is connected to the forced arc plate (805), one end of the arc-shaped sleeve rod (21) located inside the arc-shaped sleeve (20) is constructed with a piston block (25) which is in contact with the inner circumference thereof, a vent pipe (26) is connected between the arc-shaped sleeve (20) and the series pipe (15), and a butt pipe (27) is connected to the side of the arc-shaped sleeve (20) away from the free end of the arc-shaped sleeve rod (21), and the air intake mechanism (4) is connected to the butt pipe (27).

7. A pressure vessel air tightness testing device according to claim 6, characterized in that: The sealing member (2) is a rubber ring with a hollow interior and an annular shape. The air intake mechanism (4) comprises an air intake pipe (401) mounted on the annular cover (101). The outer peripheral side of the rubber ring away from the central axis is fixedly mounted on the mounting groove (106), and one end of the air intake pipe (401) passes through the mounting groove (106) and is connected to the inside of the rubber ring. An air outlet pipe (402) connected to the rubber ring is mounted on the annular cover (101). A first automatic pressure relief valve (403) is mounted on the air outlet pipe (402). The air relief port of the first automatic pressure relief valve (403) is connected to the butt joint pipe (27).

8. The pressure vessel air tightness testing device according to claim 4, characterized in that: A sleeve (28) is mounted on the placement plate (301), a wedge plate (29) is slidably mounted on one end of the sleeve (28), a plurality of wedge grooves (30) are vertically formed on the outer side of the connecting rod (14) for the inclined surface of the wedge plate (29) to be inserted, and a spring is mounted between the wedge plate (29) and the sleeve (28).

9. The pressure vessel air tightness testing device according to claim 1, characterized in that: A clamping groove (31) is provided in an annular manner along the edge of the bottom end of the annular groove (105), an annular flange (17) is provided on the outer peripheral side of the sealing ring plate (103), a sealing groove is provided in an annular manner on the outer peripheral side of the annular flange (17), and a sealing gasket is installed in the sealing groove.

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