An ultrahigh pressure container plug seal test detection device

Abstract

The present application relates to the technical field of boiler pressure vessel detection, in particular to a kind of superhigh pressure container plug sealing test detection device, its purpose is to efficiently detect and ensure the sealing property of pressure vessel sealing plug, by built-in air pressure sensor and phased array probe, in combination with compacting assembly, accurate test of the sealing performance of sealing plug can be carried out in simulated superhigh pressure environment, to ensure the safety of container.

Description

Technical Field

[0001] This invention relates to the field of boiler and pressure vessel testing technology, specifically to a device for testing the sealing of an ultra-high pressure vessel plug. Background Technology

[0002] Ultra-high pressure vessels are the core components of hot isostatic pressing (HIP) equipment. During operation, ultra-high pressure vessels can achieve safe sealing and withstand internal pressure to the maximum extent. With the increasing application of HIP equipment in the forming processes of metal and non-metal materials, its application in the food and chemical industries is also becoming more widespread. Ultra-high pressure vessels not only operate under high pressure and high stress levels, but are also often accompanied by high temperatures. The plug sealing component of ultra-high pressure vessels is the most important component, mainly composed of end caps and sealing elements (metal sealing rings).

[0003] Ultra-high pressure vessels are typically used to store or transport high-pressure gases or liquids. Even the slightest sealing defect can lead to gas or liquid leakage, potentially causing not only material loss but also serious safety accidents such as explosions or leaks of hazardous substances. The sealing of ultra-high pressure vessels requires the plug to be airtight, so sealing tests are necessary to verify the sealing performance of the plug and the entire vessel. This preliminary testing of the plug's sealing performance ensures the safe use of ultra-high pressure vessels. However, existing methods for sealing tests on ultra-high pressure vessel plugs have several problems, including the complexity of the operation, the inconvenience of the operation and testing process, and the low efficiency when conducting large-scale tests. These problems not only make the testing process time-consuming and labor-intensive but also directly affect the efficiency of the testing. Therefore, it is necessary to develop a sealing test device for ultra-high pressure vessel plugs. Summary of the Invention

[0004] To address the aforementioned deficiencies and problems, this invention provides an ultra-high pressure vessel plug sealing test and inspection device. Its purpose is to efficiently detect and ensure the sealing performance of the pressure vessel plug. Through the built-in pressure sensor and phased array probe, combined with the clamping assembly, it can accurately test the sealing performance of the plug under simulated ultra-high pressure environment, ensuring the safety of the vessel.

[0005] The solution adopted by the present invention to solve its technical problem is: an ultra-high pressure vessel plug sealing test and detection device, including a test cylinder, a pressure supply and exhaust assembly, a phased array probe, a sealing plug and a clamping assembly. The test cylinder includes a pressure vessel for filling with high pressure. A test chamber is formed between the pressure vessel and the test cylinder. A pressure sensor for detecting pressure changes is provided in the test chamber. The pressure supply and exhaust assembly is used to supply pressure and exhaust gas to the pressure vessel. A cylinder cover is movably installed at the end of the test cylinder.

[0006] The clamping assembly includes a fixed threaded sleeve coaxially mounted on the cylinder cover, a threaded tube rotatably mounted inside the fixed threaded sleeve, a drive screw rotatably mounted inside the threaded tube, and a translational push tube mounted at the inner end of the threaded tube. A sleeve portion is provided between the translational push tube and the threaded tube to prevent rotation of the translational push tube, and a disc spring is provided in the sleeve portion to compensate for axial movement of the translational push tube. Rotation of the threaded tube synchronously pushes the translational push tube axially. Multiple inner posts are evenly distributed radially on the inner side of the cylinder cover. A fixed disc guide on the outer circumference of the translational push tube is mounted on the inner posts. A pad is fixedly connected to the inner end of the translation push tube. The pad is guided and fitted onto the inner column head. Multiple radial sliding plates are slidably fitted on the outer side of the pad along the radial direction. At the same time, each radial sliding plate is elastically constrained by a ring spring. A lower conical section is opened at the bottom of the radial sliding plate. A push cone is installed at the inner end of the drive screw. The push cone can push the radial sliding plate through the lower conical section, so that the radial sliding plate moves radially on the pad. A flat hole corresponding to the radial sliding plate is opened radially on the translation push tube.

[0007] The sealing plug is guided by an inner column head and fitted parallel to the inside of the pad. The phased array probes are evenly distributed in the detection grooves on the inner side of the pad, allowing the sealing plug to be detected. A pressure sensor is installed on the ring seat at the pressure vessel opening, and an outer column head corresponding to each inner column head is connected to the ring seat. The outer column head has concave grooves on both sides. The top of the radial sliding plate has an upper inclined section, and a mating inclined section is provided on the front side of the concave groove. When the radial sliding plate moves radially, the upper inclined section and the mating inclined section cooperate to push the pad inward, sealing and pressing the sealing plug against the pressure vessel opening. After the cylinder cover is closed, the screw can control the axial translation of the sealing plug, making the sealing plug and the pressure vessel opening seal and connect. At the same time, the drive screw can push the radial sliding plate, making the radial sliding plate radially press and seal the sealing plug, thus testing the sealing performance of the sealing plug.

[0008] Furthermore, the radial sliding plate consists of a sliding block and a plate. The plates are symmetrically connected to the top of the sliding block, and a groove is formed between adjacent plates. The groove can constrain the plate to fit in the concave groove. The sliding block is slidably fitted into the constraint groove of the pad, so that the radial sliding plate can move radially on the pad. The upper inclined section is opened at the top of the plate, and the lower conical section is opened at the bottom of the sliding block.

[0009] Furthermore, a positioning parallel groove corresponding to the radial sliding plate is provided on the outer side of the pad. The positioning parallel groove can assist the radial sliding plate in positioning parallel.

[0010] Furthermore, the fixed disc is fixedly connected to the translational push tube, and a guide tube is fixedly fitted on the fixed disc. The fixed disc is guided onto the inner column head through the guide tube.

[0011] Furthermore, the sleeve part includes a sleeve ring groove formed on the screw tube, and a sleeve ring platform that engages with the sleeve ring groove is provided in the translation push tube. The translation push tube can slide axially in the sleeve ring groove of the screw tube through the sleeve ring platform. Through the mutual cooperation between the sleeve ring groove and the adjusting ring platform, the screw tube can be driven to move axially when it rotates. The disc spring is fitted between the sleeve ring platform and the sleeve ring groove.

[0012] Furthermore, the pressure supply and exhaust assembly includes a booster pump for pressurizing the pressure vessel. The booster pump is connected to the pressure vessel via a pipeline, and a pressure gauge is installed on the pipeline. An exhaust valve is installed on the pressure vessel.

[0013] The beneficial effects of this invention are as follows: This invention features a unique structure, ingenious design, and simple operation. It achieves both axial translation and radial clamping through a solenoid and a drive screw, simplifying the operation process and device structure, improving operational convenience and device compactness. It can quickly connect the sealing plug to the pressure vessel opening, and the radial clamping of the sealing plug is achieved by the drive screw pushing the radial clamping plate, effectively improving the efficiency of sealing performance testing. Through the synergistic action of the solenoid and drive screw, and the compensation stroke of the disc spring, precise axial and radial movement and clamping of the sealing plug are ensured, improving the accuracy of sealing performance testing. Furthermore, utilizing the built-in pressure sensor and phased array probe, combined with the clamping assembly, accurate testing of the sealing performance of the sealing plug can be performed under simulated ultra-high pressure environments, ensuring container safety. The overall simplified structure and operation process reduce maintenance costs and failure rates, improving the reliability and service life of the device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 This is a schematic diagram of the internal structure of the present invention.

[0016] Figure 3 This is one of the structural schematic diagrams of the clamping assembly.

[0017] Figure 4 This is the second schematic diagram of the clamping assembly.

[0018] Figure 5 This is one of the schematic diagrams showing the usage status of the clamping component.

[0019] Figure 6 This is the second schematic diagram showing the usage state of the clamping component.

[0020] Figure 7 for Figure 6 Enlarged schematic diagram of part A in the diagram.

[0021] Figure 8 This is one of the main views of the clamping component.

[0022] Figure 9 This is one of the internal cross-sectional views of the clamping assembly.

[0023] Figure 10 This is the second main view of the clamping component.

[0024] Figure 11 This is the second internal sectional view of the clamping assembly.

[0025] Figure 12 This is one of the schematic diagrams showing the unfolded clamping assembly.

[0026] Figure 13 This is the second schematic diagram of the unfolded clamping component.

[0027] Figure 14 This is a cross-sectional structural diagram of the clamping assembly.

[0028] Figure 15 Schematic diagram of the structure of the outer column head.

[0029] Figure 16 This is the control flowchart of the present invention.

[0030] In the diagram: 1-Detection cylinder, 101-Pressure vessel, 102-Cylinder opening, 103-Ring seat, 104-Detection chamber, 2-Outer column head, 201-Concave groove, 202-Matching inclined section, 3-Pressure supply and exhaust assembly, 4-Sealing plug, 401-Metal sealing ring, 5-Cylinder cover, 6-Fixing threaded sleeve, 7-Threaded tube, 8-Drive screw, 9-Pushing cone head, 10-Handwheel, 11-Transfer push tube, 12-Flat hole, 13-Sleeve connection, 131-Sleeve ring groove, 132-Sleeve ring platform, 14-Disc spring, 15-Fixing disc, 16-Guide tube, 17-Inner column head, 18-Guide seat, 19-Pad, 191-Detection groove, 192-Constraint groove, 193-Positioning parallel groove, 20-Radial sliding clamping plate, 21-Sliding block, 22-Clamping plate, 23-Upper inclined section. 24-Lower conical section, 25-Annular spring, 26-Pressure sensor, 27-Phase array probe, 28-Air pressure sensor. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] Example 1: There are several problems with the existing sealing test of the plug of ultra-high pressure vessel, including the complexity of the operation process, the inconvenience of the operation and testing process, and the low efficiency when conducting a large number of tests. These problems not only make the testing process time-consuming and laborious, but also directly affect the efficiency of the test.

[0033] To address the aforementioned issues, this embodiment provides an ultra-high pressure vessel plug sealing test device for detecting the sealing performance of the ultra-high pressure vessel plug. The main body of the device includes a test cylinder, a pressure supply and exhaust assembly, a phased array probe, a sealing plug, and a clamping assembly.

[0034] like Figure 2 As shown, the inside of the detection cylinder 1 includes a pressure vessel 101 that can be filled with high pressure. A detection chamber 104 is formed between the pressure vessel 101 and the detection cylinder 1. The detection chamber 104 is evacuated to a vacuum state, and a pressure sensor 28 is installed in the detection chamber 104 to monitor the pressure change and detect the sealing performance of the sealing plug 4. The pressure supply and exhaust assembly 3 is used to pressurize and exhaust the pressure vessel 101. The pressure supply and exhaust assembly 3 includes a booster pump for pressurizing the pressure vessel 101. The booster pump is connected to the pressure vessel 101 through a pipeline, and a pressure gauge is installed on the pipeline. An exhaust valve is installed on the pressure vessel 101.

[0035] like Figure 1 As shown, a cylinder cover 5 is movably installed at the end of the detection cylinder 1. The cylinder cover 5 is hinged and has auxiliary sealing fastening bolts. After the cylinder cover 5 is closed, the fastening bolts can be tightened onto the detection cylinder 1 to strengthen the seal of the cylinder cover 5.

[0036] like Figure 4-7 As shown, the clamping assembly includes a fixing sleeve 6 coaxially mounted on the cylinder cover 5. A threaded tube 7 is threaded onto the fixing sleeve 6, and a drive screw 8 is threaded onto the threaded tube 7. A push cone 9 is fixedly installed at the inner end of the drive screw 8, and a handwheel 10 is fixedly installed at the outer end. A translation push tube 11 is fitted onto the inner end of the threaded tube 7. A sleeve portion 13 is provided between the translation push tube 11 and the threaded tube 7 to prevent the translation push tube 11 from rotating. The threaded tube 7 can achieve synchronous axial pushing of the translation push tube 11 by rotation. The sleeve portion 13 includes a portion formed on the threaded tube 7. A connecting ring groove 131 is provided, and a connecting ring platform 132 is provided in the translation push tube 11 to engage with the connecting ring groove 131. The translation push tube 11 can slide axially in the connecting ring groove 131 of the screw tube 7 through the connecting ring platform 132. Through the mutual cooperation between the connecting ring groove 131 and the adjusting ring platform, the screw tube 7 can push the translation push tube 11 to move axially when it rotates. A disc spring 14 is provided in the connecting part 13 to compensate for the axial movement of the translation push tube 11. The disc spring 14 is fitted between the connecting ring platform 132 and the connecting ring groove 131, and the disc spring 14 is located inside the connecting platform.

[0037] Multiple inner columns 17 are evenly distributed radially on the inner side of the cylinder cover 5. There can be 6-8 inner columns 17. The inner columns 17 are fixedly fitted in the guide seat 18 on the inner side of the cylinder cover 5. A fixed disc 15 is provided on the outer circumference of the translation push tube 11. The fixed disc 15 is fixedly connected to the translation push tube 11. A guide tube 16 is fixedly fitted on the fixed disc 15. The fixed disc 15 is guided and fitted onto the inner column 17 through the guide tube 16. The function of the inner column 17 is to position and fit the sealing plug 4, and to guide the translation push tube 11 and prevent the translation push tube 11 from rotating.

[0038] A pad 19 is fixedly connected to the inner end of the translational push tube 11. The pad 19 is guided and fitted onto the inner column head 17, and the pad 19 is parallel to the fixed disc 15. Figure 12-14 As shown, multiple radial sliding plates 20 are radially slidably fitted onto the outer surface of the pad 19. The radial sliding plates 20 are slidably fitted into the constraint grooves 192 of the pad 19, and each radial sliding plate 20 is elastically constrained by annular springs 25. Initially, each radial sliding plate 20 is elastically constrained by the annular springs 25 into a retracted state, preventing it from detaching from the pad 19. It should be noted that each radial sliding plate 20 consists of a sliding block 21 and a locking plate 22. The locking plates 22 are symmetrically fixed to the top of the sliding block 21, and adjacent locking plates 22 form a locking groove. This groove can constrain the locking sleeve onto the recessed groove 2 of the outer column head 2. On 01, the top of the card plate 22 is provided with an upper inclined section 23, and the sliding block 21 can be slidably fitted into the constraint groove 192 of the pad 19, so that the radial sliding card plate 20 can move radially on the pad 19. The bottom of the sliding block 21 is provided with a lower conical section 24, and the push cone 9 at the inner end of the drive screw 8 can push the radial sliding card plate 20 through the lower conical section 24, so that the radial sliding card plate 20 moves radially on the pad 19. The translation push tube 11 is provided with a flat hole 12 corresponding to the radial sliding card plate 20. When the radial sliding card plate 20 moves radially, the radial sliding card plate 20 can pass through the flat hole 12 and move out of the translation push tube 11.

[0039] A metal sealing ring 401 is fixedly fitted onto the sealing plug 4, and the sealing plug 4 can be guided parallel to the inner side of the pad 19 along the inner column head 17. A detection groove 191 is opened on the inner side of the pad 19, and phased array probes 27 are evenly installed in the detection groove 191. The phased array probes 27 are connected to the controller signal. The phased array probes 27 are ultrasonic probes. Defect detection of the sealing plug 4 can be performed through the phased array probes 27. Phased array is an ultrasonic testing technology that uses multiple ultrasonic probes arranged in a specific time and space distribution. By adjusting the phase difference between the ultrasonic waves emitted by the probes, the focus point and scanning direction of the ultrasonic beam can be controlled to achieve beamforming. It utilizes the propagation characteristics of ultrasonic waves in materials to detect defects inside metals or other solid materials. Ultrasonic waves can penetrate metals and propagate within them. When encountering defects inside the material (such as cracks, pores, inclusions, etc.), the ultrasonic waves are reflected, refracted, or scattered. The reflected ultrasonic waves are received by the probe. By analyzing these signals, the location, size, and nature of the defects can be determined, enabling defect detection of the sealing plug 4. This provides more accurate defect location and a wider coverage area. In ultrasonic testing, phased array technology is equivalent to ultrasonic imaging technology in medical imaging. It allows the inspector to change the propagation direction of the ultrasonic waves electronically without moving the probe. The phased array probe 27 can adopt a disk-shaped layout to perform comprehensive inspection of circular parts. That is to say, when the sealing plug 4 is subjected to ultra-high pressure in the pressure vessel 101 and causes defects such as deformation or damage, the phased array probe 27 can detect these defects.

[0040] like Figure 5 , Figure 8 , Figure 12 As shown, a pressure sensor 26 is installed on the ring seat 103 at the opening 102 of the pressure vessel 101. The pressure sensor 26 is connected to the controller signal. When the solenoid 7 rotates to control the sealing plug 4 to mate with the opening 102 of the pressure vessel 101, the pressure sensor 26 can detect the axial pressure of the sealing plug 4. Figure 5 , Figure 8-12 As shown, outer column heads 2 corresponding to each inner column head 17 are fixedly connected to the ring seat 103, such as... Figure 15 As shown, the outer column head 2 has concave grooves 201 on both sides, and a mating inclined section 202 is provided on the front side of the concave grooves 201. The mating inclined section 202 can cooperate with the upper inclined section 23 of the radial sliding plate 20. When the radial sliding plate 20 moves radially, the upper inclined section 23 and the mating inclined section 202 cooperate to push the pad 19 inward, and seal the sealing plug 4 onto the opening 102 of the pressure vessel 101.

[0041] After the cylinder cover 5 is closed, the screw tube 7 can control the axial translation of the sealing plug 4, so that the sealing plug 4 is sealed and connected with the tank opening 102 of the pressure vessel 101. At the same time, the drive screw 8 can push the radial sliding plate 20, so that the radial sliding plate 20 radially presses and seals the sealing plug 4, and tests the sealing performance of the sealing plug 4.

[0042] Operating procedure: The sealing plug 4 to be tested is guided parallel to the inner column head 17 and fitted into the inner side of the pad 19, ensuring that the sealing plug 4 is aligned with the detection groove 191 on the inner side of the pad 19. The cylinder cover 5 of the detection cylinder 1 is closed to ensure the sealing between the cylinder cover 5 and the detection cylinder 1. After the cylinder cover 5 is closed, the inner column head 17 and the outer column head 2 are close but not in contact, and there is a gap.

[0043] In its initial state, the radial sliding plate 20 is constrained and in a retracted state by the annular spring 25. Rotating the drive screw 7 via the handwheel 10 causes the pusher cone 9 of the drive screw 8 to push the radial sliding plate 20, moving it radially outward on the pad 19. This causes the top of the radial sliding plate 20 to press against the underside of the inner column head 17. Because the inner column head 17 lacks recessed grooves 201 on both sides, the radial sliding plate 20 is locked and constrained by the inner column head 17 after pressing against it. This causes the drive screw 8 to press tightly against the radial sliding plate 20. Since the drive screw 8 is in a state of pressing against the radial sliding plate 20, and the top of the radial sliding plate 20 is constrained by the inner column head 17, the radial sliding plate 20 is further constrained. Locked, at this time, rotating the drive screw 8 will not rotate within the screw tube 7. Then, continue rotating the drive screw 8, which will drive the screw tube 7 to rotate within the fixed screw sleeve 6. The rotation of the screw tube 7 synchronously moves and pushes the translation push tube 11, thereby moving the sealing plug 4 forward until the sealing plug 4 is initially connected with the tank opening 102 of the pressure vessel 101. When the pressure sensor 26 alarms, it indicates that the sealing plug 4 and the tank opening 102 of the pressure vessel 101 have achieved the initial connection and compression effect. It should be noted that during the process of rotating the screw tube 7 to control the axial translation of the sealing plug 4 and connecting the sealing plug 4 with the tank opening 102, the sealing plug 4 will be gradually pushed from the inner column head 17 to the outer column head 2 by the pad 19.

[0044] When the sealing plug 4 is aligned with the can opening 102, the screw tube 7 is in a tightened state with no rotational or translational travel. Simultaneously, the inner column head 17 no longer constrains and locks the radial sliding plate 20, exposing the concave groove 201 on the outer side of the outer column head 2. The top of the radial sliding plate 20 can fit into the concave groove 201 of the outer column head 2. Since the screw tube 7 has no rotational or translational travel, it will not rotate within the fixed screw sleeve 6. Therefore, the drive screw 8 can rotate freely within the screw tube 7, continuing to rotate... The moving screw 8 and the pushing cone 9 push the radial sliding plate 20, causing the radial sliding plate 20 to move outward radially. Through the inclined surface cooperation between the upper inclined section 23 of the radial sliding plate 20 and the inclined section 202 of the outer column head 2, the radial sliding plate 20 pushes the pad 19 inward, radially pressing the sealing plug 4. At the same time, when the pad 19 is pressed, the disc spring 14 compensates for its movement stroke, sealing and pressing the sealing plug 4 into the can opening 102, achieving the effect of becoming tighter with increasing pressure.

[0045] After the sealing plug 4 is radially compressed, the detection chamber 104 is evacuated to a negative pressure or vacuum state by a negative pressure machine. The pressure sensor 28 detects the pressure change in the detection chamber 104 and pressurizes the pressure vessel 101 through the pressure supply and exhaust assembly 3 to maintain the pressure vessel 101 at an ultra-high pressure state. The sealing plug 4 is then subjected to non-destructive testing by the phased array probe 27 to ensure the sealing performance of the sealing plug 4 under ultra-high pressure. If the pressure sensor 28 detects a pressure change or the phased array probe 27 detects an abnormality, it indicates that the sealing plug 4 has a leak, thus detecting the sealing performance of the sealing plug 4. Furthermore, the controller can upload the detected data to the server and then perform data analysis through a finite element analysis model.

[0046] After the test is completed, the pressure vessel 101 is vented through the pressure supply and exhaust assembly 3 to reduce the pressure. The drive screw 8 is rotated in the opposite direction to release the radial sliding plate 20, so that the sealing plug 4 is separated from the can opening 102. The cylinder cover 5 is opened and the sealing plug 4 is taken out, thus completing the entire sealing performance test process of the sealing plug 4.

[0047] The characteristic of this structure is that it only requires one set of handwheel 10 (screw tube 7 and drive screw 8). By turning the handwheel 10, two actions are achieved: axial translation and radial pressing. The first action is to first translate the sealing plug 4 by rotating the screw tube 7 to align the sealing plug 4 with the can opening 102. The second action is to push the radial sliding plate 20 by the drive screw 8. By utilizing the inclined surface cooperation between the radial sliding plate 20 and the outer column head 2, the plate 22 can press the plug body.

[0048] Preferably, considering that the solenoid 7 and the drive screw 8 are threadedly installed on the cylinder cover 5, and the presence of thread gaps may affect the negative pressure vacuum state inside the detection chamber 104, a sealing cover can also be set on the outside of the cylinder cover 5. The sealing cover is fitted onto the cylinder cover 5 to achieve a seal on the outer side of the cylinder cover 5. That is, by sealing the solenoid 7 and the drive screw 7 on the outer side of the cylinder cover 5, the sealing cover can completely cover and seal the solenoid 7 and the drive screw 7, so that both the inside of the sealing cover and the inside of the detection chamber 104 are in a negative pressure vacuum state, and the presence of thread gaps will not affect the detection effect of the pressure sensor 28.

[0049] Example 2, the ultra-high pressure vessel plug sealing test and detection device in this embodiment is described with a focus on the differences from that in Example 1.

[0050] In this embodiment, as Figure 12-13 As shown, a positioning parallel groove 193 corresponding to the radial sliding plate 20 is provided on the outer side of the pad 19. The positioning parallel groove 193 can assist the radial sliding plate 20 in positioning parallel. The above description is only a preferred embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An ultrahigh pressure vessel plug seal test detection device, characterized by, The utility model provides a kind of detection device, including detection cylinder, pressure supply and exhaust component, phased array probe, sealing plug body and compression assembly, detection cylinder inside includes to fill high pressure pressure container, pressure container is formed with detection chamber between detection cylinder, detection chamber is equipped with the air pressure sensor of detecting air pressure change, pressure supply and exhaust component is used to pressure supply and exhaust to pressure container, and movable mounting has cylinder cover in the end of detection cylinder; Compression assembly includes fixed nipple that is arranged in the coaxial center of cylinder cover, fixed nipple is rotatably sleeved with screw pipe, screw pipe is rotatably sleeved with driving screw, and flat push tube is sleeved with the inner end of screw pipe, flat push tube is equipped with the sleeve joint portion for preventing flat push tube from rotating between screw pipe, and disc spring is equipped in the sleeve joint portion for compensating the axial movement of flat push tube, screw pipe can synchronously axially push flat push tube by rotating;Multiple inner studs are evenly distributed on the inner side of cylinder cover along the radial direction, and the fixed disc guide sleeve of the outer circumferential side of flat push tube is sleeved on inner stud, the inner end of flat push tube is fixedly connected with pad, and pad guide sleeve is sleeved on inner stud, the outer side of pad is slidably sleeved with multiple radial sliding clamping plates along the radial direction, and each radial sliding clamping plate is elastically constrained by annular spring, and lower conical surface section is formed in the bottom of radial sliding clamping plate, the inner end of driving screw is provided with push cone, and push cone can push radial sliding clamping plate through lower conical surface section, so that radial sliding clamping plate moves along the radial direction on pad, and flat push tube is provided with flat hole corresponding to radial sliding clamping plate along the radial direction; Sealing plug body is parallelly sleeved on the inner side of pad by inner stud guide, phased array probe is evenly distributed in the detection groove of the inner side of pad, and sealing plug body can be detected by phased array probe;Pressure sensor is arranged on the ring seat of pressure container, and outer stud corresponding to each inner stud is connected on the ring seat, recessed groove is formed in the both sides of outer stud, upper inclined surface section is formed in the top of radial sliding clamping plate, and matching inclined surface section is formed in the front side of recessed groove, when radial sliding clamping plate moves along the radial direction, the mutual cooperation of upper inclined surface section and matching inclined surface section can make radial sliding clamping plate push pad inward, so that sealing plug body is tightly sealed to the opening of pressure container;After cylinder cover is closed, screw pipe can control the axial translation of sealing plug body, so that sealing plug body is tightly sealed to the opening of pressure container, and driving screw can push radial sliding clamping plate, so that radial sliding clamping plate is tightly sealed to sealing plug body along the radial direction, and the tightness of sealing plug body can be tested and detected.

2. The device according to claim 1, wherein Radial sliding clamping plate is composed of sliding block and clamping plate, clamping plate is symmetrically connected on the top of sliding block, and clamping groove is formed between adjacent clamping plates, clamping groove can constrain clamping sleeve on recessed groove, sliding block is slidably sleeved in the restraint groove of pad, so that radial sliding clamping plate can move along the radial direction on pad, and upper inclined surface section is formed in the top of clamping plate, and lower conical surface section is formed in the bottom of sliding block.

3. The device according to claim 1, wherein Positioning parallel groove corresponding to radial sliding clamping plate is arranged on the outer side of pad, and positioning parallel groove can assist the positioning of radial sliding clamping plate.

4. The device according to claim 1, wherein Fixed disc is fixedly connected on flat push tube, and guide pipe is fixedly sleeved on fixed disc, and fixed disc is guided and sleeved on inner stud through guide pipe.

5. The device according to claim 1, wherein The sleeve joint part comprises a sleeve joint ring groove opened on the screw pipe, and a sleeve joint ring table is arranged in the translation push pipe and sleeved with the sleeve joint ring groove. The translation push pipe can axially slide in the sleeve joint ring groove of the screw pipe through the sleeve joint ring table. Through the mutual cooperation of the sleeve joint ring groove and the adjusting ring table, the screw pipe can push the translation push pipe to axially move when rotating. The disc spring is sleeved between the sleeve joint ring table and the sleeve joint ring groove.

6. The device according to claim 1, wherein The pressure supply and exhaust assembly comprises a pressure increasing pump for increasing the pressure of the pressure container. The pressure increasing pump is connected with the pressure container through a pipeline. A pressure gauge is arranged on the pipeline. An exhaust valve is arranged on the pressure container.

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