Pressure testing device for pressure vessel

Abstract

The present invention relates to the field of pressure vessel testing technology, in particular to a pressure testing device for pressure vessels, comprising a gas tank, a flipping mechanism, comprising a swing shaft and a clamping frame; a positioning mechanism, comprising a positioning plug, a water injection mechanism, comprising a water nozzle, and a water jacket box. The gas tank is driven by the swing shaft to perform multi-angle flipping to enter different working procedures, thereby realizing an integrated setting of fixation, water injection, detection and drainage processes. The gas tank is lifted and the detection result is judged, and the clamping frame automatically clamps, fixes and disassembles the gas tank, further improving the installation and disassembly speed of the gas tank, being compatible with gas tanks of different specifications, broadening the application scenarios, comprehensively controlling the rotation of the driving teeth and the swing shaft through the control unit, making a preliminary judgment using the visual acquisition unit, draining the water when encountering unqualified products that may explode, and then performing manual review to avoid pressure detection, thereby improving detection safety and detection efficiency, optimizing process steps, improving detection efficiency and improving detection safety.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure vessel testing, in particular to a pressure testing device for a pressure vessel. Background Art

[0002] A hydrogen storage tank is a specialized container for storing hydrogen, widely used in hydrogen fuel cell vehicles, industrial gas storage, and energy reserves. Since hydrogen is a highly flammable and explosive gas, it places strict demands on the storage environment. Hydrogen storage tanks must not only possess extremely high strength and pressure resistance, but also maintain excellent airtightness to prevent hydrogen leakage. Hydrogen storage tanks must withstand the storage of high-pressure hydrogen during use, so their tank materials and structures must be able to withstand high-pressure environments for extended periods. The main purpose of pressure testing is to ensure that hydrogen storage tanks do not deform, crack, or explode due to excessive pressure during filling and use. Pressure testing verifies the pressure resistance of hydrogen storage tanks, detects potential structural problems early on, and ensures their safety and reliability.

[0003] Common pressure testing methods include the hydrostatic test, which involves filling the hydrogen storage tank with water and then applying a high pressure exceeding its operating pressure. The advantage of hydrostatic testing is that liquids are not easily compressed, making it safer. If the tank ruptures or leaks, water will not react violently like gas would. The test also monitors the tank for deformation, leakage, or other damage.

[0004] During hydrostatic testing, hydrogen storage tanks need to be securely fixed to prevent displacement, vibration, or rotation during pressurization. Due to the large size and diverse shapes of hydrogen storage tanks, the clamping device must be designed to accommodate tanks of varying sizes and geometries, while also providing sufficient force during pressurization to prevent loosening. However, traditional clamping devices may not provide uniform clamping force, especially when the pressure is high, which can result in uneven force on the tank, affecting test results.

[0005] The existing Chinese patent application with publication number CN108709797A discloses a new pressure vessel water pressure testing device and testing method, including a base, a rocker, and a water injection pipe. The base is provided with a slide rail, and a sliding plate is installed on the inner side of the slide rail. A soft pad is installed above the sliding plate, and baffles are provided on the front and rear sides of the soft pad. The support frame is installed above the base, and a support ring is connected to the support frame above. A hydraulic rod is provided on the inner side of the support ring, and a fixed clamp is installed on the inner side of the hydraulic rod. The inner side of the fixed clamp is provided with an anti-wear rubber pad. The rocker is located at the front end of the support frame, and explosion-proof glass is installed on the rear side of the rocker. This new pressure vessel water pressure testing device is equipped with multiple sets of support frames, hydraulic rods, and fixed clamps, which facilitates the simultaneous testing of multiple pressure vessels of different diameters, improves the work efficiency of workers in water pressure testing, and enhances the practicality of the device.

[0006] However, since the drainage problem is not considered in the above-mentioned device, the drainage process takes too long, and the water cannot be discharged in time, affecting subsequent drying steps, resulting in low actual detection efficiency. Therefore, it is not suitable for actual production. At the same time, defective gas tanks may cause accidents such as tank explosions during water pressure testing, which may harm operators observing closely. Therefore, a pressure vessel detection device is needed that records pressurization data according to the process position, so as to predict the gas tank based on the image comparison before and after the detection, thereby reducing safety accidents and improving detection efficiency. Summary of the Invention

[0007] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0008] In view of the above problems in the prior art, the present invention is proposed.

[0009] In order to solve the above technical problems, the present invention provides the following technical solutions: a pressure testing device for a pressure vessel, comprising a gas tank, wherein the gas tank is used to load hydrogen;

[0010] The turning mechanism includes a swing shaft and a clamping frame that turns along with the swing shaft, wherein when the swing shaft rotates clockwise, the gas cylinder is fixed to the clamping frame and moves synchronously with the swing shaft;

[0011] A positioning mechanism, comprising a positioning plug provided on the clamping frame, wherein the positioning plug is sealed and engaged with the gas tank when the clamping frame is turned clockwise;

[0012] The water injection mechanism includes a water nozzle that rotates and penetrates the positioning plug. The water nozzle is used to inject water into the gas tank. A water jacket box is provided below the swing shaft. After the water injection is completed, the gas tank enters the water jacket box for water pressure testing.

[0013] As a preferred solution of the pressure testing device for the pressure vessel of the present invention, wherein: a swing arm is fixedly sleeved on the outer wall of the swing shaft, the clamping frame is fixedly mounted on the swing arm, and the swing shaft is arranged perpendicular to the swing arm;

[0014] The clamping frame includes a stator frame and a mover frame. A telescopic rod is slidably provided on the stator frame. A telescopic hole is opened on the mover frame. A first elastic member is provided between an end surface of the telescopic rod sliding into the telescopic hole and an inner wall of the telescopic hole.

[0015] As a preferred embodiment of the pressure testing device for a pressure vessel of the present invention, the stator frame is provided with a first rotating shaft, which extends through the stator frame and has a first transmission wheel and a drive wheel respectively provided on both sides thereof; a second rotating shaft is rotatably provided on the stator frame near the first transmission wheel, and a second transmission wheel is fixedly engaged with the second rotating shaft;

[0016] A boss is fixedly provided on the mover frame, the second rotating shaft extends to the mover frame and slides through the boss, and a third transmission wheel is provided on one end of the second rotating shaft that passes through the boss;

[0017] The positioning plug is rotatably arranged on the inner wall of the mover frame. One end of the positioning plug that passes through the outer wall of the mover frame is provided with a fourth transmission wheel. The third transmission wheel is meshed with the fourth transmission wheel for transmission.

[0018] As a preferred solution of the pressure testing device for the pressure vessel of the present invention, a fixing plug is provided on the outer wall of one end of the water nozzle close to the gas tank, a sealing gasket is provided on the outer wall of the fixing plug, the fixing plug is movably engaged with the opening of the gas tank, and a vacuum suction cup is provided on the mover frame on the other side.

[0019] As a preferred embodiment of the pressure testing device for a pressure vessel of the present invention, the device further comprises a transmission mechanism, including a support platform, a conveying rod provided on the support platform, a conveying wheel rotatably provided on the conveying rod, and a conveyor belt sheathed on the outer wall of each conveying wheel;

[0020] The conveying rods are symmetrically arranged on both sides of the support platform. Conveying wheels are arranged in a linear array on the conveying rods, and a conveying belt is arranged on the outer shell of each conveying wheel on a single side of the conveying rod.

[0021] As a preferred solution of the pressure testing device for the pressure vessel of the present invention, wherein: the stator frame is slidably mounted on the swing arm, the first rotating shaft slides through the two symmetrically arranged stator frames, and a mother rod and a child rod are respectively parallelly mounted on the inner wall of the moving frame;

[0022] A buffer rod is also slidably provided on the inner wall of the stator frame, a second elastic member is provided between the buffer rod and the inner wall of the stator frame, a platform is provided on one end of the buffer rod away from the stator frame, a first roller is rotatably provided on the platform, a second roller is rotatably sleeved on the first rotating shaft, and a cam is provided on the outer wall of the second roller.

[0023] As a preferred solution of the pressure testing device for the pressure vessel of the present invention, wherein: the outer walls of the two symmetrically arranged sub-rods are provided with toothed bars, and the two parallel toothed bars are simultaneously rotated and meshed with a first spherical tooth, the axis of the first spherical tooth is provided with a third rotating shaft, the third rotating shaft rotates through the platform and is provided with a fifth transmission wheel, and the first roller is coaxially fixed with a sixth transmission wheel.

[0024] As a preferred embodiment of the pressure testing device for a pressure vessel of the present invention, a cavity is formed in the driving wheel, half teeth are coaxially arranged in the cavity, and internal teeth are arranged in a circumferential array on the inner wall of the cavity;

[0025] The end surface of the cavity is rotatably provided with a driving tooth, and the driving tooth is engaged with any one of the inner teeth and the half teeth at any time.

[0026] As a preferred solution of the pressure testing device for the pressure vessel of the present invention, it further comprises a control module, the control module is provided with a control system, the control system is used to control the driving teeth and the swing shaft to rotate at the same angular velocity, the control system further comprises an information acquisition unit and a suction cup adjustment unit, the information acquisition unit comprises a pressure sensor and a flow sensor provided inside the water nozzle for detecting and recording the amount of liquid inflow and the water pressure inside the gas tank, the suction cup adjustment unit is used to regulate the on / off state and rotation rate of the motor of the vacuum suction cup.

[0027] As a preferred solution of the pressure testing device for the pressure vessel of the present invention, wherein: the information acquisition unit also includes a visual acquisition unit arranged inside the water jacket, and the visual acquisition unit is used to collect image information of each surface of the gas tank before and after detection, and the control system also includes a judgment unit, which receives the pressure magnitude of the gas tank and compares it with the set detection pressure magnitude, and at the same time receives the detection surface image information and performs comparative analysis, and for images whose difference values ​​exceed the set threshold, an alarm is issued and the drive wheel is controlled to rotate as a whole to the outside of the water jacket and discharge the water pressure.

[0028] The beneficial effects of the present invention are as follows: the gas tank is driven to flip at multiple angles by the swing shaft, thereby realizing an integrated setting of fixation, water injection, detection and drainage processes; the gas tank can be lifted in the water jacket box and the detection results can be judged; the clamping frame automatically clamps and fixes and disassembles according to the rotation angle of the swing shaft, and gas tanks of different lengths can be clamped and fixed through the upper and lower end faces, thereby broadening the application scenarios and further improving the installation and disassembly speed of the gas tank; the control unit comprehensively controls the rotation of the driving teeth and the swing shaft, and uses the visual acquisition unit to make a preliminary judgment; when encountering unqualified products that may explode, drainage is carried out, and then manual review is carried out to avoid pressure monitoring, thereby improving detection safety and detection efficiency, optimizing process steps, improving detection efficiency, and improving detection safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0030] Figure 1 Schematic diagram of the overall pressure testing device for the pressure vessel of the present invention.

[0031] Figure 2 This is an enlarged view of the details of area A in the present invention.

[0032] Figure 3 Schematic diagram of the flipping mechanism in the present invention.

[0033] Figure 4 It is a partially enlarged schematic diagram of the turning mechanism in the present invention.

[0034] Figure 5 This is an enlarged view of area B in the present invention.

[0035] Figure 6 This is an enlarged schematic diagram of region C in the present invention.

[0036] Figure 7 Schematic diagram of the cooperation between the first roller and the second roller in the present invention.

[0037] Figure 8 Schematic diagram of the internal structure of the driving wheel in the present invention.

[0038] In the figure: 100, gas tank; 1001, cavity; 1002, half tooth; 1003, inner tooth; 1008, driving tooth;

[0039] 200, swing shaft; 2001, swing arm; 2002, stator frame; 2003, mover frame; 2004, telescopic rod; 2005, telescopic hole; 2006, first rotating shaft; 2007, first transmission wheel; 2008, driving wheel; 2009, second rotating shaft; 201, clamping frame; 2011, second transmission wheel; 2012, boss; 2013, third transmission wheel; 2014, fourth transmission wheel; 2015, sealing gasket; 2016, fixing plug; 2017, vacuum suction cup; 2026, first elastic member;

[0040] 300, positioning plug; 3002, mother rod; 3003, sub-rod; 3004, buffer rod; 3005, second elastic member; 3006, platform; 3007, first roller; 3008, second roller; 3009, cam; 3011, toothed bar; 3012, first scallop; 3013, third rotating shaft; 3014, fifth transmission wheel; 3015, sixth transmission wheel;

[0041] 400, water nozzle; 4001, support platform; 401, water jacket box; 402, conveying rod; 403, conveying wheel; 404, conveyor belt. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0043] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0044] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0045] Example 1

[0046] Reference Figures 1 to 8 , which is the first embodiment of the present invention, provides a pressure testing device for a pressure vessel, including a flipping mechanism, a positioning mechanism and a water injection mechanism. The gas tank 100 is driven to flip at multiple angles by the swing shaft 200, realizing the integrated setting of the fixing, water injection, detection and drainage processes, optimizing the process steps, improving the detection efficiency and improving the detection safety.

[0047] Specifically, it includes a gas tank 100, which is used to load hydrogen;

[0048] The turning mechanism includes a swing shaft 200 and a clamping frame 201 that turns along with the swing shaft 200. When the swing shaft 200 rotates clockwise, the gas cylinder 100 is fixed to the clamping frame 201 and moves synchronously with the swing shaft 200.

[0049] The positioning mechanism includes a positioning plug 300 provided on the clamping frame 201. The positioning plug 300 is sealed and engaged with the gas tank 100 when the clamping frame 201 is turned clockwise.

[0050] The water injection mechanism includes a water nozzle 400 that rotates and penetrates the positioning plug 300. The water nozzle 400 is used to inject water into the gas tank 100. A water jacket box 401 is provided below the swing shaft 200. After the water injection is completed, the gas tank 100 enters the water jacket box 401 for water pressure testing.

[0051] More preferably, a swing arm 2001 is fixedly sleeved on the outer wall of the swing shaft 200 , the clamping frame 201 is fixedly mounted on the swing arm 2001 , and the swing shaft 200 and the swing arm 2001 are arranged perpendicularly.

[0052] Among them, the clamping frame 201 includes a stator frame 2002 and a mover frame 2003. A telescopic rod 2004 is slidably provided on the stator frame 2002. A telescopic hole 2005 is opened on the mover frame 2003. A first elastic member 2026 is provided between one end surface of the telescopic rod 2004 sliding into the telescopic hole 2005 and the inner wall of the telescopic hole 2005.

[0053] The telescopic rod 2004 is slidably disposed in the telescopic hole 2005 and slides along the radial direction of the swing shaft 200 . The telescopic rod 2004 and the telescopic hole 2005 are also arranged along the radial direction of the swing shaft 200 .

[0054] More preferably, the first elastic member 2026 in this embodiment is a spring, and the spring is used to pull the moving sub-frame 2003 to retract toward the stator frame 2002 .

[0055] There are two stator frames 2002 and two mover frames 2003 , and they are symmetrically arranged. In this embodiment, the two stator frames 2002 are fixed on the outer wall of the swing arm 2001 .

[0056] Preferably, a first rotating shaft 2006 is provided on the stator frame 2002, and the first rotating shaft 2006 passes through the stator frame 2002 and is respectively provided with a first transmission wheel 2007 and a driving wheel 2008 on both sides thereof. A second rotating shaft 2009 is rotatably provided on the stator frame 2002 near the first transmission wheel 2007, and a second transmission wheel 2011 is fixedly embedded on the second rotating shaft 2009.

[0057] In this embodiment, the first rotating shaft 2006 rotates through the stator frame 2002, the first transmission wheel 2007 and the second transmission wheel 2011 are bevel gears, and the first transmission wheel 2007 and the second transmission wheel 2011 are meshed and connected, so that when the first rotating shaft 2006 rotates, the second rotating shaft 2009 is driven to rotate.

[0058] More preferably, a boss 2012 is fixedly provided on the mover frame 2003 , the second rotating shaft 2009 extends to the mover frame 2003 and slides through the boss 2012 , and a third transmission wheel 2013 is provided on one end of the second rotating shaft 2009 that passes through the boss 2012 .

[0059] The positioning plug 300 is rotatably mounted on the inner wall of the movable frame 2003 , and one end of the positioning plug 300 that passes through the outer wall of the movable frame 2003 is provided with a fourth transmission wheel 2014 . The third transmission wheel 2013 is meshed with the fourth transmission wheel 2014 for transmission.

[0060] The fourth transmission wheel 2014 is a hollow bevel gear, and the water nozzle 400 is rotatably arranged inside the fourth transmission wheel 2014 through a rotary joint. The water nozzle 400, the fourth transmission wheel 2014, and the positioning plug 300 are coaxially arranged.

[0061] Furthermore, a fixing plug 2016 is provided on the outer wall of one end of the water nozzle 400 close to the gas tank 100, and a sealing gasket 2015 is provided on the outer wall of the fixing plug 2016. The fixing plug 2016 is movably engaged with the opening of the gas tank 100, and a vacuum suction cup 2017 is provided on the mover frame 2003 on the other side.

[0062] Among them, the vacuum suction cup 217 is fixedly fitted at the center of the outer wall end surface of the gas tank 100, and the vacuum suction cup 217 is coaxially arranged with the fixing plug 216. In this embodiment, the opening of the gas tank 100 adopts a pipe thread, and the fixing plug 216 is also provided with an external thread. The fixing and removal of the gas tank 100 are carried out by rotating the fixing plug 216.

[0063] More preferably, when the gas tank 100 needs to be fixed and filled with water, the vacuum suction cup 2017 is in working condition, sucking the gas tank 100 to fix it. At this time, the rotating fixing plug 2016 will be fixed and removed from the gas tank 100. When the inspection of the gas tank 100 is completed, the swing shaft 200 swings to the opening facing downward, and the water flows out automatically after the fixing plug 2016 is removed, thereby increasing the drainage speed and facilitating the subsequent drying and inspection process.

[0064] More preferably, in other embodiments, the vacuum suction cup 2017 and the mover frame 2003 are rotatably arranged, and the vacuum suction cup 2017 is controlled by a servo motor. When draining, the servo motor controls the vacuum suction cup 2017 to rotate, and the internal water flow is thrown out to speed up the drying process.

[0065] The pressure testing device for the pressure vessel further comprises a transmission mechanism, including a support platform 4001 , a conveying rod 402 is provided on the support platform 4001 , a conveying wheel 403 is rotatably provided on the conveying rod 402 , and a conveying belt 404 is also provided on the outer wall of each conveying wheel 403 .

[0066] More preferably, the conveying rod 402 is symmetrically arranged on both sides of the support platform 4001, and a linear array of conveying wheels 403 is provided on the conveying rod 402. Each conveying wheel 403 on the single-sided conveying rod 402 is provided with a conveyor belt 404. The two conveyor belts 404 jointly clamp and position the gas tank 100, and the conveying wheels 403 on both sides turn in opposite directions, thereby jointly conveying the gas tank 100 forward in a vertical posture.

[0067] Among them, the gas tank 100 is a type 4 hydrogen storage tank liner that has been preliminarily processed and is made of composite materials. The surface of the conveyor belt 404 is wear-resistant rubber to increase the contact area with the gas tank 100 and prevent the clamping force from being too strong and causing the gas tank 100 to deform.

[0068] More preferably, the water jacket box 401 is filled with liquid. After the gas tank 100 is filled with liquid, the water nozzle 400 and the one-way valve are used to pressurize the gas tank 100 to perform internal pressure and sealing tests. The sealing performance is judged by detecting the pressure change. When the gas tank 100 is filled with air but not liquid, the liquid that penetrates into the inner wall of the outer water jacket box 401 is observed to judge the anti-permeability performance and detect whether the permeability requirements of the hydrogen storage tank are met.

[0069] The water jacket box 401 is made of high-strength steel, which plays a protective role when the gas tank 100 breaks or explodes, thereby protecting personal safety.

[0070] In summary, when in use, the gas tank 100 is clamped and conveyed forward by the two conveyor belts 404. The gas tank 100 enters the two mover frames 2003 on the clamping frame 201 in a vertical posture with the opening facing upward. At this time, the driving wheel 2008 is controlled to rotate, driving the first rotating shaft 2006 and the second rotating shaft 2009 to rotate. The vacuum suction cup 2017 starts to support the column gas tank 100 and fix it, so that each transmission wheel drives the fixing plug 2016 to rotate and engage and seal with the gas tank 100. Then water is injected and the gas in the gas tank 100 is discharged through the one-way valve and the exhaust valve until the gas tank 100 is filled with liquid.

[0071] At the same time, the swing shaft 200 and the swing arm 2001 are controlled to rotate 90° clockwise, and the gas tank 100 follows the clamping frame 201 into the water jacket box 401 and is immersed in water. At this time, the water nozzle 400 continues to pressurize to the pressure required for detection, and performs pressure and air tightness detection. After the detection is completed, the swing shaft 200 continues to rotate 90° clockwise, so that the gas tank 100 is rotated out of the water jacket box 401 in a vertical posture with the opening downward, and then the driving wheel 2008 is rotated in the opposite direction, so that the fixing plug 2016 slowly rotates and disengages from the gas tank 100, and the gas tank 100 slowly flows out along the opening below, and it is convenient for the staff to perform the wiping and drying steps, realizing the integrated setting of the fixing, water injection, detection and drainage processes, optimizing the process steps, and improving the detection efficiency.

[0072] Example 2

[0073] Reference Figures 1 to 8 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment, but differs in that the gas tank 100 can be lifted in the water jacket box 401 and separated from the liquid surface to determine the detection result. The clamping frame 201 automatically clamps and removes the gas tank 100 according to the rotation angle of the swing shaft 200, further improving the installation and removal speed of the gas tank 100 and improving the detection efficiency.

[0074] Specifically, the stator frame 2002 is slidably provided on the swing arm 2001 , the first rotating shaft 2006 slides through the two symmetrically arranged stator frames 2002 , and the inner wall of the movable frame 2003 is respectively and parallelly provided with a mother rod 3002 and a sub-rod 3003 .

[0075] Among them, the mover frames 2003 on both sides are symmetrically distributed around the center, and a sliding groove is opened in the mother rod 3002, so that the sub-rod 3003 of each mover frame 2003 can be slid and inserted into the mother rod 3002 of another mover frame 2003, so that gas tanks 100 of different length specifications can be clamped through the upper and lower end surfaces, broadening the application scenarios.

[0076] Among them, a buffer rod 3004 is also slidably provided on the inner wall of the stator frame 2002, and a second elastic member 3005 is provided between the buffer rod 3004 and the inner wall of the stator frame 2002. A platform 3006 is provided at the end of the buffer rod 3004 away from the stator frame 2002, and a first roller 3007 is rotatably provided on the platform 3006. A second roller 3008 is rotatably provided on the first rotating shaft 2006, and a cam 3009 is provided on the outer wall of the second roller 3008.

[0077] The second elastic member 3005 is a spring, and the buffer rods 3004 on both sides are simultaneously connected to the platform 3006 in the middle, so that the stator frames 2002 on both sides are buffered by the buffer rods 3004 and the second elastic member 3005 at the same time, so that the platform 3006 is always located in the center of the two stator frames 2002.

[0078] More preferably, the outer walls of the two symmetrically arranged sub-rods 3003 are provided with a toothed bar 3011, and the two parallel toothed bars 3011 are simultaneously rotated and meshed with each other to provide a first round tooth 3012, the axis of the first round tooth 3012 is provided with a third rotating shaft 3013, the third rotating shaft 3013 rotates through the platform 3006 and is provided with a fifth transmission wheel 3014, and the first roller 3007 is coaxially fixed with a sixth transmission wheel 3015.

[0079] Among them, the fifth transmission wheel 3014 and the sixth transmission wheel 3015 are engaged with each other, the cam 3009 is an elliptical protrusion and is fixedly embedded in the circular outer wall of the second roller 3008, and the first roller 3007 is tightly fitted to the surface of the second roller 3008 under the action of the first elastic member 2026, so that when the first roller 3007 rolls along the surface of the second roller 3008 and the cam 3009, it drives the sixth transmission wheel 3015 to rotate.

[0080] More preferably, in this embodiment, the vacuum suction cup 2017 is rotatably arranged on the mover frame 2003, and the rotation of the vacuum suction cup 2017 is controlled by a motor. When the motor is not powered, the vacuum suction cup 2017 can rotate freely. When the motor is powered, it can only stay still or move following the motor.

[0081] For example, when the first roller 3007 rolls from the surface of the second roller 3008 to the surface of the cam 3009, it pushes the first roller 3007 and the platform 3006 to move outward, thereby pushing the gas tank 100 downward into the water jacket box 401 and immersing it in water. When it needs to be taken out for observation, the driving wheel 2008 rotates in the opposite direction, and the second roller 3008 rotates in the opposite direction to cause the platform 3006 and the first roller 3007 to rebound, thereby causing the movable frame 2003 to rebound. At this time, the motor is not powered, and the gas tank 100 can be driven to rotate by the second rotating shaft 2009 to shake off water droplets on the surface. At the same time, the rotation of the gas tank 100 facilitates the visual sensor inside the water jacket box 401 to collect and detect images in three dimensions to determine whether there are crack defects.

[0082] Example 3

[0083] Reference Figures 1-8 This is the third embodiment of the present invention. This embodiment is based on the previous embodiment, but differs in that the control unit comprehensively controls the rotation of the driving teeth 1008 and the swing shaft 200 to improve the detection efficiency. The visual acquisition unit is used to make a preliminary judgment. When encountering unqualified products that may explode, drainage is performed, and then manual review is performed, thereby improving the detection safety and detection efficiency.

[0084] Specifically, in this embodiment, a cavity 1001 is opened in the driving wheel 2008 , half teeth 1002 are coaxially arranged in the cavity 1001 , and inner teeth 1003 are arranged in a circumferential array on the inner wall of the cavity 1001 .

[0085] More preferably, the end surface of the cavity 1001 is rotatably provided with a driving tooth 1008 , and the driving tooth 1008 is engaged with any one of the inner teeth 1003 and the half teeth 1002 at any time.

[0086] The cavity 1001 is circular, the inner teeth 1003 are distributed on the inner wall of the cavity 1001 in a semicircular array, and the half teeth 1002 are half gears with half teeth.

[0087] More preferably, the half teeth 1002 and the inner teeth 1003 rotate integrally with the driving wheel 2008 , and the driving teeth 1008 and the swing shaft 200 rotate at the same angular velocity.

[0088] It also includes a control module, which is equipped with a control system. The control system is used to control the driving teeth 1008 and the swing shaft 200 to rotate at the same angular velocity. The control system also includes an information acquisition unit and a suction cup adjustment unit. The information acquisition unit includes a pressure sensor and a flow sensor arranged inside the water nozzle 400 for detecting and recording the liquid intake and water pressure inside the gas tank 100. The suction cup adjustment unit is used to control the motor on and off state and rotation rate of the vacuum suction cup 2017.

[0089] More preferably, the information collection unit also includes a visual collection unit arranged inside the water jacket box 401, which is used to collect image information of each surface of the gas tank 100 before and after detection. The control system also includes a judgment unit, which receives the pressure magnitude of the gas tank 100 and compares it with the set detection pressure magnitude, and at the same time receives the detection surface image information and performs comparative analysis. For images whose difference values ​​exceed the set threshold, an alarm is issued and the drive wheel 2008 is controlled to rotate as a whole to the outside of the water jacket box 401 and discharge water pressure, so that the surface of the gas tank 100 can be manually inspected in a safe scenario to avoid risks such as tank explosion during the manual inspection process.

[0090] Among them, the first roller 3007 is in contact with the second roller 3008 in the initial state. When the second roller 3008 rotates 90°, the first roller 3007 rolls to the cam 3009 on the second roller 3008, and the driving tooth 1008 is engaged with the center position of the half tooth 1002 at the initial moment. After the driving tooth 1008 rotates 90°, it begins to engage with the inner tooth 1003.

[0091] In summary, after the gas tank 100 enters the clamping frame 201 from the conveying mechanism, the suction cup adjustment unit controls the vacuum suction cup 2017 to adsorb and adhere to the bottom of the gas tank 100 and starts the motor so that the vacuum suction cup 2017 and the gas tank 100 are in a fixed state. The control system controls the driving gear 1008 and the swing shaft 200 to rotate at the same angular velocity. After the swing shaft 200 rotates 90°, the gas tank 100 enters the water jacket box 401 and is parallel to the liquid level.

[0092] At the same time, the driving tooth 1008 first meshes with the half tooth 1002 and drives the driving wheel 2008 and the first rotating shaft 2006 to rotate, thereby driving the positioning plug 300 to rotate through the second rotating shaft 2009, and at the same time, the circular surface of the second roller 3008 drives the first roller 3007 to rotate, and drives the third rotating shaft 3013 and the first round tooth 3012 to rotate through the fifth transmission wheel 3014 and the sixth transmission wheel 3015. The two rack bars 3011 slide in opposite directions and drive the sub-rod 3003 to retract into the mother rod 3002, so that the two symmetrically arranged movable sub-frames 2003 and the stator frame 2002 approach each other, so that the positioning plug 300 rotates into the opening of the gas tank 100 to achieve sealing. As the rotation continues and the two movable sub-frames 2003 approach each other, the soft sealing gasket 2015 begins to deform and fit with the opening of the gas tank 100 to seal. At this time, the suction cup adjustment unit turns off the motor, allowing the vacuum suction cup 2017 to rotate freely.

[0093] When the driving tooth 1008 rotates 90°, the first roller 3007 rolls to the cam 3009 on the second roller 3008. At this time, the cam 3009 pushes the first roller 3007 and the mover frame 2003 to move outward. At the same time, the gas tank 100 is put into the liquid surface, and the rotation of the positioning plug 300 will drive the gas tank 100 to rotate, which is convenient for the visual acquisition unit to collect images. Then the water nozzle 400 is pressurized and the internal pressure is detected by the pressure sensor. When a pressure drop exceeds the threshold during the pressurization process, it proves that there is a problem with the air tightness.

[0094] After the detection is completed, the driving gear 1008 starts to engage with the internal gear 1003 and drives the driving wheel 2008 to rotate in the opposite direction. At this time, the gas tank 100 rotates in the opposite direction from the water jacket box 401 to leave the liquid surface. The visual acquisition unit performs a second image acquisition and comparative analysis. When the set distinction threshold is exceeded, the suction cup adjustment unit starts the motor to make the vacuum suction cup 2017 rotate forward, and the gas tank 100 and the fixing plug 2016 are quickly disassembled to relieve the pressure. After the pressure is safely relieved, a manual inspection is performed; when the distinction threshold is not exceeded, the suction cup adjustment unit starts the motor to make the vacuum suction cup 2017 immobile. As the driving wheel 2008 rotates in the opposite direction, the fixing plug 2016 slowly separates from the gas tank 100. At the same time, water slowly flows downward from the opening of the gas tank 100 to prevent the pressure from being released too quickly and causing drastic stress changes in the tank structure, or even causing damage or deformation of the tank material. At the same time, the two moving sub-frames 2003 are moved away from each other, which facilitates the subsequent drying step process of the gas tank 100, thereby improving the efficiency of the sealing detection and the safety of the detection process.

[0095] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A pressure testing device for a pressure vessel, characterized in that: It comprises a gas tank (100), wherein the gas tank (100) is used to load hydrogen; A turning mechanism comprises a swing shaft (200) and a clamping frame (201) that turns along with the swing shaft (200), wherein when the swing shaft (200) rotates clockwise, the gas cylinder (100) is fixed to the clamping frame (201) and moves synchronously therewith; A positioning mechanism comprising a positioning plug (300) provided on the clamping frame (201), wherein the positioning plug (300) is sealed and engaged with the gas tank (100) when the clamping frame (201) is turned clockwise; The water injection mechanism comprises a water nozzle (400) that rotates and penetrates the positioning plug (300), the water nozzle (400) is used to inject water into the gas tank (100), a water jacket box (401) is provided below the swing shaft (200), and the gas tank (100) enters the water jacket box (401) for water pressure testing after water injection; The outer wall of the swing shaft (200) is fixedly sleeved with a swing arm (2001), the clamping frame (201) is fixedly arranged on the swing arm (2001), and the swing shaft (200) and the swing arm (2001) are arranged perpendicularly; The clamping frame (201) comprises a stator frame (2002) and a mover frame (2003); a telescopic rod (2004) is slidably provided on the stator frame (2002); a telescopic hole (2005) is provided on the mover frame (2003); a first elastic member (2026) is provided between an end surface of the telescopic rod (2004) that slides into the telescopic hole (2005) and an inner wall of the telescopic hole (2005); The stator frame (2002) is provided with a first rotating shaft (2006), the first rotating shaft (2006) passes through the stator frame (2002), and a first transmission wheel (2007) and a driving wheel (2008) are respectively provided on both sides thereof; a second rotating shaft (2009) is rotatably provided on the stator frame (2002) near the first transmission wheel (2007), and a second transmission wheel (2011) is fixedly embedded on the second rotating shaft (2009); A boss (2012) is fixedly provided on the mover frame (2003), the second rotating shaft (2009) extends to the mover frame (2003) and slides through the boss (2012), and a third transmission wheel (2013) is provided at one end of the second rotating shaft (2009) that passes through the boss (2012); The positioning plug (300) is rotatably arranged on the inner wall of the mover frame (2003); one end of the positioning plug (300) extending through the outer wall of the mover frame (2003) is provided with a fourth transmission wheel (2014); and the third transmission wheel (2013) and the fourth transmission wheel (2014) are meshed for transmission.

2. The pressure testing device for a pressure vessel according to claim 1, wherein: A fixing plug (2016) is provided on the outer wall of one end of the water spray nozzle (400) close to the gas tank (100), a sealing gasket (2015) is provided on the outer wall of the fixing plug (2016), the fixing plug (2016) is movably engaged with the opening of the gas tank (100), and a vacuum suction cup (2017) is provided on the mover frame (2003) on the other side.

3. The pressure testing device for a pressure vessel according to claim 2, wherein: It also includes a transmission mechanism, including a support platform (4001), a conveying rod (402) provided on the support platform (4001), a conveying wheel (403) rotatably provided on the conveying rod (402), and a conveying belt (404) sleeved on the outer wall of each conveying wheel (403); The conveying rods (402) are symmetrically arranged on both sides of the support platform (4001), and a linear array of conveying wheels (403) is provided on the conveying rods (402). Each conveying wheel (403) on a single side of the conveying rod (402) is provided with a conveyor belt (404) on its outer cover.

4. The pressure testing device for a pressure vessel according to claim 3, wherein: The stator frame (2002) is slidably arranged on the swing arm (2001), the first rotating shaft (2006) slides through the two symmetrically arranged stator frames (2002), and the inner wall of the moving frame (2003) is respectively and parallelly provided with a mother rod (3002) and a sub-rod (3003); A buffer rod (3004) is also slidably provided on the inner wall of the stator frame (2002), a second elastic member (3005) is provided between the buffer rod (3004) and the inner wall of the stator frame (2002), a platform (3006) is provided at one end of the buffer rod (3004) away from the stator frame (2002), a first roller (3007) is rotatably provided on the platform (3006), a second roller (3008) is rotatably sleeved on the first rotating shaft (2006), and a cam (3009) is provided on the outer wall of the second roller (3008).

5. The pressure testing device for a pressure vessel according to claim 4, wherein: The outer walls of the two symmetrically arranged sub-rods (3003) are both provided with toothed bars (3011), and the two parallel toothed bars (3011) are simultaneously rotated and meshed with each other to provide a first round tooth (3012), the axis of the first round tooth (3012) is provided with a third rotating shaft (3013), the third rotating shaft (3013) rotates and passes through the platform (3006) and is provided with a fifth transmission wheel (3014), and the first roller (3007) is fixedly provided with a sixth transmission wheel (3015) coaxially.

6. The pressure testing device for a pressure vessel according to claim 5, wherein: A cavity (1001) is formed in the driving wheel (2008), half teeth (1002) are coaxially arranged in the cavity (1001), and inner teeth (1003) are arranged in a circumferential array on the inner wall of the cavity (1001); The end surface of the cavity (1001) is rotatably provided with a driving tooth (1008), and the driving tooth (1008) is engaged with any one of the inner teeth (1003) and the half teeth (1002) at any time.

7. The pressure testing device for a pressure vessel according to claim 6, wherein: The invention also includes a control module, wherein the control module is provided with a control system, wherein the control system is used to control the driving teeth (1008) and the swing shaft (200) to rotate at the same angular velocity, and the control system also includes an information acquisition unit and a suction cup adjustment unit, wherein the information acquisition unit includes a pressure sensor and a flow sensor provided inside the water nozzle (400) for detecting and recording the amount of liquid inflow and the water pressure inside the gas tank (100), and the suction cup adjustment unit is used to control the on / off state and rotation rate of the motor of the vacuum suction cup (2017).

8. The pressure testing device for a pressure vessel according to claim 7, wherein: The information acquisition unit further comprises a visual acquisition unit disposed inside the water jacket box (401), the visual acquisition unit being used to acquire image information of each surface of the gas tank (100) before and after detection. The control system further comprises a judgment unit, the judgment unit receiving the pressure magnitude of the gas tank (100) and comparing it with a set detection pressure magnitude, while receiving the detected surface image information and performing comparative analysis, and issuing an alarm for images whose difference values ​​exceed a set threshold value and controlling the driving wheel (2008) to rotate as a whole to the outside of the water jacket box (401) and discharge the water pressure.

Images