A fatigue testing device and method for aluminum alloy hydrogen storage bottle

Abstract

The present invention discloses a fatigue testing device and method for an aluminum alloy hydrogen storage bottle, wherein the external fixing sleeve of the support shaft is provided with a gear ring, and the present invention relates to the technical field of aluminum alloy hydrogen storage bottle testing. The fatigue testing device and method for an aluminum alloy hydrogen storage bottle can simulate the process of repeatedly filling and discharging gas into an aluminum alloy hydrogen storage bottle under actual working conditions through the cooperation of a working disk, a containing cylinder mechanism, a ventilation mechanism, a servo motor, an air pump, and a multi-gas path controller, so as to achieve the purpose of fatigue testing a plurality of aluminum alloy hydrogen storage bottles at the same time, thereby improving the testing efficiency. Through the cooperation of a protective outer cylinder, an explosion-proof inner cylinder, a spring, a limit assembly, and a sealing cover assembly, the limit assembly can be driven to work by utilizing the self-gravity of the aluminum alloy hydrogen storage bottle, so as to automatically and quickly clamp and fix the aluminum alloy hydrogen storage bottle in the explosion-proof inner cylinder, thereby simplifying the operation process, and during the test process, it can prevent the fragments generated by the explosion from splashing everywhere, thereby reducing the risk of accidents.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum alloy hydrogen storage bottle testing, and in particular to a fatigue testing device and method for aluminum alloy hydrogen storage bottles. Background Art

[0002] As a key equipment for hydrogen energy storage, aluminum alloy hydrogen storage bottles have been widely used in hydrogen fuel cell vehicles and hydrogen refueling stations due to their light weight, corrosion resistance, high strength and safety. However, it is worth noting that aluminum alloy hydrogen storage bottles may face the risk of fatigue crack propagation during frequent filling and degassing. Therefore, it is necessary to use fatigue testing equipment to test the fatigue performance of aluminum alloy hydrogen storage bottles to ensure the safety of hydrogen energy applications and provide a reliable basis for the design optimization and performance improvement of hydrogen storage bottles.

[0003] A liquefied petroleum gas cylinder fatigue test device disclosed in the patent application with reference publication number CN216594538U. When the device starts working, the liquefied petroleum gas cylinder is placed on the placement block, and the motor is started by the motor control module. The motor drives the screw to rotate, and the screw drives the two threaded blocks to move toward the middle at the same time. The threaded block drives the clamping column to move at the same time to clamp and fix the bottom of the liquefied petroleum gas cylinder. Then, the hydraulic pressure is started by the hydraulic pressure control module to drive the first movable block to move downward. Then, the second electric telescopic rod is started by the second electric telescopic rod control module to push the clamping arc block to clamp and fix the top of the liquefied petroleum gas cylinder, and the fatigue test is started. The fatigue test can be performed on liquefied petroleum gas cylinders of different sizes, thereby improving the practicality of the device.

[0004] Comprehensive analysis of the above reference patents shows the following defects:

[0005] The existing fatigue testing devices and methods for aluminum alloy hydrogen storage bottles are difficult to simulate the process of repeatedly filling and discharging gas into the aluminum alloy hydrogen storage bottles under actual working conditions, and are unable to evaluate the performance of the aluminum alloy hydrogen storage bottles under different pressures. In addition, it is difficult to perform fatigue tests on multiple aluminum alloy hydrogen storage bottles at the same time, and the test efficiency is low. Therefore, it is necessary to provide a fatigue testing device and method for aluminum alloy hydrogen storage bottles to solve the above technical problems. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a fatigue testing device and method for aluminum alloy hydrogen storage bottles, which solves the problems that it is difficult to simulate the process of repeatedly filling and discharging gas into an aluminum alloy hydrogen storage bottle under actual working conditions, it is impossible to evaluate the performance of the aluminum alloy hydrogen storage bottle under different pressures, it is difficult to perform fatigue testing on multiple aluminum alloy hydrogen storage bottles at the same time, and the testing efficiency is low.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A fatigue testing device for aluminum alloy hydrogen storage bottles, comprising:

[0008] A support frame is placed on the ground, a support shaft is rotatably provided in the middle of the top of the support frame, a working disk is fixedly provided on the top of the support shaft, a gear ring is provided on the external fixed sleeve of the support shaft, a plurality of vertical plates are evenly fixedly provided on the top of the working disk, a servo motor is fixedly provided on the top of the inner cavity of the support frame, an output end of the servo motor passes through the top of the support frame and is fixedly provided with a first gear, the first gear is meshed with the gear ring, an air pump is fixedly provided on the bottom of the inner cavity of the support frame, a multi-air-path controller is fixedly provided on the exhaust end of the air pump, the top of the multi-air-path controller is fixedly connected with the bottom of the ventilation mechanism, an intelligent panel is fixedly provided on the right side of the upper front end of the support frame, a plurality of ventilation holes are provided at the bottom of the working disk and directly below each accommodating cylinder mechanism;

[0009] A plurality of accommodating cylinder mechanisms are used to place the aluminum alloy hydrogen storage bottle and automatically clamp and limit the aluminum alloy hydrogen storage bottle. The plurality of accommodating cylinder mechanisms are evenly arranged in a circle outside the top of the working plate;

[0010] The ventilation mechanism is used to intermittently deliver different amounts of gas to the aluminum alloy hydrogen storage bottle in the accommodating cylinder mechanism to change the pressure in the aluminum alloy hydrogen storage bottle in different time periods. The ventilation mechanism runs through the interior of the support shaft.

[0011] Preferably, each of the accommodating cylinder mechanisms comprises a protective outer cylinder, the protective outer cylinder is fixedly connected to the top of the working disk, an explosion-proof inner cylinder is fixedly arranged at the bottom of the inner cavity of the protective outer cylinder, vertical grooves are provided at the lower parts of both sides of the explosion-proof inner cylinder, sliding grooves are provided at the upper outer walls of both sides of the explosion-proof inner cylinder, a plurality of exhaust ports are evenly provided on the outer wall of the explosion-proof inner cylinder and located between two adjacent sliding grooves from top to bottom, a plurality of springs are evenly fixedly provided at the bottom of the inner cavity of the explosion-proof inner cylinder, a limiting assembly is provided between the tops of the plurality of springs, a sealing cover assembly is provided between the protective outer cylinder and the top of the explosion-proof inner cylinder, a plurality of air outlets connected with the corresponding air holes are evenly provided at the bottom of the protective outer cylinder and located outside the explosion-proof inner cylinder, and the outer wall of the protective outer cylinder and the sealing cover assembly are connected by a plurality of locks.

[0012] Preferably, the limiting assembly includes a chassis, the bottom of the chassis is fixedly connected to the tops of a plurality of springs, T-blocks are fixedly provided on both sides of the chassis, the two T-blocks slide through corresponding vertical grooves respectively, racks are fixedly provided at the top rear ends of the two T-blocks, and a slider is fixedly provided at the top of the side where the two racks are close to each other.

[0013] Preferably, the two sliding blocks are respectively slidably connected in the corresponding sliding grooves, and screw rods are rotatably arranged between the outer walls of the explosion-proof inner tube and the inner walls of the protective outer tube. The threads on the two screw rods are in opposite directions, and the outsides of the two screw rods are fixedly sleeved with second gears, and the two second gears are respectively meshed with corresponding racks, and the outsides of the two screw rods are threadedly sleeved with internal threaded sleeves.

[0014] Preferably, L-shaped rods are fixedly provided on the upper and lower parts of the two internal threaded sleeves, the ends of the four L-shaped rods close to each other slide through the interior of the explosion-proof inner tube and are fixedly provided with arc-shaped clamping plates, and the sides of the four arc-shaped clamping plates close to each other are fixedly provided with a plurality of rubber anti-slip strips.

[0015] Preferably, the sealing cover assembly includes a sealing cover, a connecting sleeve is fixedly provided in the middle of the top of the sealing cover, an externally threaded tube is threadedly penetrated between the connecting sleeve and the interior of the sealing cover, a sealing sleeve is fixedly provided on the inner wall of the externally threaded tube, an adjusting disk is fixedly provided on the top of the externally threaded tube, a fastening bolt is threadedly penetrated on one side of the connecting sleeve, and a vertical tube is rotatably provided in the middle of the top of the adjusting disk.

[0016] Preferably, the interior of the vertical pipe is connected with the interior of the external threaded tube, a pressure sensor is fixedly installed at the lower part of the vertical pipe, a solenoid valve is fixedly installed at the upper part of the vertical pipe, a hose is fixedly connected to the top of the vertical pipe, and one end of the hose away from the sealing cover is fixedly connected to the side wall of the corresponding vertical plate.

[0017] Preferably, the ventilation mechanism includes a hollow rod, which is fixedly connected to the top of the multi-gas-channel controller and passes through the support shaft and the interior of the working disk. Four branch pipes are passed through the interior of the hollow rod, and the bottoms of the four branch pipes are respectively fixedly connected to the four air outlet channels of the multi-gas-channel controller. An air guide disk assembly is fixedly arranged between the hollow rod and the top of the four branch pipes. A connecting disk is rotatably sleeved on the top of the air guide disk assembly. A plurality of through holes are evenly opened in a circle inside the connecting disk. A plurality of L-shaped tubes are evenly fixedly arranged in a circle on the top of the connecting disk. The interiors of the plurality of L-shaped tubes are respectively connected to the corresponding through holes, and the ends of the plurality of L-shaped tubes away from each other are respectively fixedly connected to the side walls of the corresponding vertical plates and are connected to the corresponding hoses.

[0018] Preferably, the air guide plate assembly includes an air guide plate, four air supply cavities are evenly opened inside the air guide plate, the bottoms of the four air supply cavities are respectively connected to the tops of corresponding branch pipes, and four exhaust cavities are evenly opened inside the air guide plate, and the exhaust cavities and the air supply cavities are alternately distributed in sequence.

[0019] The present invention also provides a fatigue testing method for an aluminum alloy hydrogen storage bottle, using a fatigue testing device for an aluminum alloy hydrogen storage bottle, and the specific method comprises the following steps:

[0020] Step 1, open the lock on the frontmost accommodating cylinder mechanism, remove the sealing cover assembly from the protective outer cylinder, and then place the aluminum alloy hydrogen storage bottle to be tested in the explosion-proof inner cylinder. During the downward movement of the aluminum alloy hydrogen storage bottle in the explosion-proof inner cylinder, press down the limit assembly, the spring is compressed, and during the downward movement of the limit assembly, gradually clamp the two sides of the aluminum alloy hydrogen storage bottle until the aluminum alloy hydrogen storage bottle cannot move downward, and the limit assembly automatically clamps and limits it, and then re-place the sealing cover assembly between the top of the protective outer cylinder and the explosion-proof inner cylinder, close the lock, lock the sealing cover assembly to the top of the protective outer cylinder, and then adjust the sealing cover assembly to connect the sealing cover assembly with the bottle mouth of the aluminum alloy hydrogen storage bottle;

[0021] Step 2, then start the servo motor to drive the first gear to rotate, and the gear ring, support shaft, working disk and accommodating cylinder mechanism rotate accordingly, and the accommodating cylinder mechanism is rotated counterclockwise forty-five degrees and then paused for a set time, and the air pump works to supply gas to the aluminum alloy hydrogen storage bottle through the multi-gas path controller, ventilation mechanism and sealing cover assembly. When the pressure in the aluminum alloy hydrogen storage bottle reaches the set value, the solenoid valve is closed, and the servo motor works again to drive the working disk and the accommodating cylinder mechanism to rotate. During the rotation of the accommodating cylinder mechanism, the pressure sensor monitors the pressure change in the aluminum alloy hydrogen storage bottle in real time, and the accommodating cylinder mechanism is further rotated counterclockwise forty-five degrees and then paused for a set time, and then the solenoid valve is opened to completely discharge the gas in the aluminum alloy hydrogen storage bottle;

[0022] Step 3: Then start the servo motor again, rotate the accommodating cylinder mechanism counterclockwise for 45 degrees and pause for the set time again, and the air pump supplies air to the aluminum alloy hydrogen storage bottle again through the multi-air path controller, the ventilation mechanism and the sealing cover assembly. When the pressure in the aluminum alloy hydrogen storage bottle reaches the set value, close the solenoid valve and the servo motor works again;

[0023] Step 4. Repeat steps 2 and 3 to repeatedly inflate and exhaust the aluminum alloy hydrogen storage bottle, for a total of four inflations and four exhausts. During the four inflations, the amount of gas inflated each time increases sequentially to simulate the operation of repeatedly filling and discharging gas in the aluminum alloy hydrogen storage bottle under actual working conditions. Perform fatigue tests on the aluminum alloy hydrogen storage bottle, and use a pressure sensor to monitor the pressure change in the aluminum alloy hydrogen storage bottle after each inflation. If the pressure decreases, it means that the aluminum alloy hydrogen storage bottle is leaking, and the aluminum alloy hydrogen storage bottle is unqualified.

[0024] Beneficial Effects

[0025] The present invention provides a fatigue testing device and method for aluminum alloy hydrogen storage bottles. Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. A fatigue testing device and method for aluminum alloy hydrogen storage bottles. Through the cooperation between a working disk, a accommodating cylinder mechanism, a ventilation mechanism, a servo motor, an air pump and a multi-gas path controller, the aluminum alloy hydrogen storage bottle can be quickly positioned in the accommodating cylinder mechanism, and the servo motor is started to rotate the accommodating cylinder mechanism. During the process, the process of repeatedly filling and discharging gas into the aluminum alloy hydrogen storage bottle under actual working conditions can be simulated, thereby achieving the purpose of fatigue testing multiple aluminum alloy hydrogen storage bottles at the same time and improving the test efficiency.

[0027] 2. A fatigue testing device and method for an aluminum alloy hydrogen storage bottle. Through the cooperation between a protective outer cylinder, an explosion-proof inner cylinder, a spring, a limit assembly and a sealing cover assembly, when the aluminum alloy hydrogen storage bottle is placed into the explosion-proof inner cylinder, the limit assembly can be driven by the aluminum alloy hydrogen storage bottle's own gravity to automatically and quickly clamp and fix the aluminum alloy hydrogen storage bottle in the explosion-proof inner cylinder, thereby simplifying the operating process and preventing the fragments generated by the explosion from splashing around during the test, thereby reducing the risk of accidents.

[0028] 3. A fatigue testing device and method for an aluminum alloy hydrogen storage bottle. Through the cooperation among a multi-gas-path controller, branch pipes, an air guide plate assembly, a connecting plate, an L-shaped tube and a pressure sensor, the air pump works to discharge the gas through the multi-gas-path controller. The multi-gas-path controller performs diversion processing on the gas input by the air pump, and can accurately control the flow direction and flow rate of the gas, so that the gas flows out through four branch pipes respectively, and the flow rate in each branch pipe is different, so that different amounts of gas can be filled into the aluminum alloy hydrogen storage bottle at different stages. As the working plate rotates, the aluminum alloy hydrogen storage bottle is connected with the four branch pipes in sequence, which can simulate the process of gradually increasing the gas filling amount in the hydrogen storage bottle under actual working conditions, and test the performance of the hydrogen storage bottle under different pressures.

[0029] 4. A fatigue testing device and method for an aluminum alloy hydrogen storage bottle. The aluminum alloy hydrogen storage bottle is placed on the chassis through the cooperation between the external threaded tube, the chassis, the rack, the second gear, the internal threaded sleeve and the arc-shaped clamping plate. The chassis is pressed downward by the gravity of the aluminum alloy hydrogen storage bottle, and the rack moves downward accordingly, thereby rotating the second gear and the screw rod, and the internal threaded sleeve and the arc-shaped clamping plate approach one side of the hydrogen storage bottle. The four arc-shaped clamping plates cooperate with each other to automatically clamp and limit the aluminum alloy hydrogen storage bottles of different bottle sizes, and have a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a first stereogram of the present invention;

[0031] Figure 2 is a second stereogram of the present invention;

[0032] Figure 3 An exploded view of the present invention;

[0033] Figure 4 A three-dimensional diagram of the working disk of the present invention;

[0034] Figure 5 A three-dimensional diagram of the accommodating tube mechanism of the present invention;

[0035] Figure 6 It is a cutaway perspective view of the accommodating tube mechanism of the present invention;

[0036] Figure 7 For the present invention Figure 6 A partial enlarged view of the middle A;

[0037] Figure 8 is an exploded view of the accommodating tube mechanism of the present invention;

[0038] Fig. 9 is a three-dimensional diagram of the limiting assembly of the present invention;

[0039] Fig.10 is an exploded view of the limit assembly of the present invention;

[0040] Fig.11 is a three-dimensional diagram of a sealing cover assembly of the present invention;

[0041] Fig.12 For the present invention Figure 8 A partial enlarged view of point B in the middle;

[0042] Fig.13 is a three-dimensional diagram of the ventilation mechanism of the present invention;

[0043] Fig.14 is a cutaway perspective view of the ventilation mechanism of the present invention;

[0044] Fig.15 is an exploded view of the ventilation mechanism of the present invention;

[0045] Fig.16 is a three-dimensional diagram of the air guide plate assembly of the present invention;

[0046] Fig.17 It is a sectional stereoscopic view of the air guide plate assembly of the present invention.

[0047] In the figure: 1, support frame; 2, support shaft; 3, working disk; 4, gear ring; 5, accommodating cylinder mechanism; 51, protective outer cylinder; 52, explosion-proof inner cylinder; 53, vertical groove; 54, slide groove; 55, exhaust port; 56, spring; 57, limit assembly; 571, chassis; 572, T-block; 573, rack; 574, slider; 575, screw rod; 576, second gear; 577, internal thread sleeve; 578, L-shaped rod; 579, arc splint; 58, sealing cover assembly; 581, sealing cover; 582, connecting sleeve; 583, external thread pipe ; 584, adjusting disk; 585, fastening bolt; 586, vertical pipe; 587, pressure sensor; 588, solenoid valve; 589, hose; 59, air outlet; 510, lock; 6, vertical plate; 7, ventilation mechanism; 71, hollow rod; 72, branch pipe; 73, air guide plate assembly; 731, air guide plate; 732, air supply cavity; 733, exhaust cavity; 74, connecting plate; 75, through hole; 76, L-shaped tube; 8, servo motor; 9, first gear; 10, air pump; 11, multi-gas path controller; 12, smart panel; 13, air vent. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] The present invention provides two technical solutions:

[0050] like Figures 1 to 4 A first embodiment is shown: a fatigue testing device for an aluminum alloy hydrogen storage bottle, comprising:

[0051] A support frame 1 is placed on the ground, a support shaft 2 is rotatably provided in the middle of the top of the support frame 1, a working disk 3 is fixedly provided on the top of the support shaft 2, a gear ring 4 is fixedly provided on the outer fixed sleeve of the support shaft 2, a plurality of vertical plates 6 are evenly fixedly provided on the top of the working disk 3, a servo motor 8 is fixedly provided on the top of the inner cavity of the support frame 1, an output end of the servo motor 8 passes through the top of the support frame 1 and is fixedly provided with a first gear 9, the first gear 9 is meshed with the gear ring 4, an air pump 10 is fixedly provided on the bottom of the inner cavity of the support frame 1, a multi-gas-path controller 11 is fixedly provided on the exhaust end of the air pump 10, the top of the multi-gas-path controller 11 is fixedly connected with the bottom of the ventilation mechanism 7, an intelligent panel 12 is fixedly provided on the right side of the upper front end of the support frame 1, a plurality of ventilation holes 13 are provided at the bottom of the working disk 3 and directly below each accommodating cylinder mechanism 5;

[0052] A plurality of accommodating cylinder mechanisms 5 are used to place the aluminum alloy hydrogen storage bottle and automatically clamp and limit the aluminum alloy hydrogen storage bottle. The plurality of accommodating cylinder mechanisms 5 are evenly arranged in a circle outside the top of the working plate 3;

[0053] The ventilation mechanism 7 is used to intermittently deliver different amounts of gas to the aluminum alloy hydrogen storage bottle in the accommodating tube mechanism 5 to change the pressure in the aluminum alloy hydrogen storage bottle in different time periods. The ventilation mechanism 7 runs through the interior of the support shaft 2.

[0054] Through the mutual cooperation among the working disk 3, the accommodating cylinder mechanism 5, the ventilation mechanism 7, the servo motor 8, the air pump 10 and the multi-gas path controller 11, the aluminum alloy hydrogen storage bottle can be quickly positioned in the accommodating cylinder mechanism 5, and the servo motor 8 is started to rotate the accommodating cylinder mechanism 5. During the process, the process of repeatedly filling and discharging gas into the aluminum alloy hydrogen storage bottle under actual working conditions can be simulated, thereby achieving the purpose of fatigue testing multiple aluminum alloy hydrogen storage bottles at the same time and improving the test efficiency.

[0055] like Figures 5 to 17A second embodiment is shown, which mainly differs from the first embodiment in that: a fatigue testing device for an aluminum alloy hydrogen storage bottle, each accommodating cylinder mechanism 5 includes a protective outer cylinder 51, the protective outer cylinder 51 is fixedly connected to the top of the working disk 3, an explosion-proof inner cylinder 52 is fixedly arranged at the bottom of the inner cavity of the protective outer cylinder 51, vertical grooves 53 are provided at the lower parts of both sides of the explosion-proof inner cylinder 52, and slide grooves 54 are provided on the upper outer walls of both sides of the explosion-proof inner cylinder 52, and a plurality of exhaust ports 55 are evenly provided on the outer wall of the explosion-proof inner cylinder 52 and located between two adjacent slide grooves 54 from top to bottom, a plurality of springs 56 are evenly fixedly arranged at the bottom of the inner cavity of the explosion-proof inner cylinder 52, a limiting assembly 57 is provided between the tops of the plurality of springs 56, and a spacer 57 is provided between the tops of the protective outer cylinder 51 and the explosion-proof inner cylinder 52. A sealing cover assembly 58 is provided, a plurality of air outlets 59 connected to the corresponding vent holes 13 are evenly provided at the bottom of the protective outer cylinder 51 and outside the explosion-proof inner cylinder 52, the protective outer cylinder 51 and the outer wall of the sealing cover assembly 58 are connected by a plurality of lock buckles 510, the limiting assembly 57 includes a chassis 571, the bottom of the chassis 571 is fixedly connected to the tops of a plurality of springs 56, T-blocks 572 are fixedly provided on both sides of the chassis 571, the two T-blocks 572 slide through the corresponding vertical grooves 53 respectively, racks 573 are fixedly provided at the top rear ends of the two T-blocks 572, sliders 574 are fixedly provided on the tops of the two racks 573 close to each other, the two sliders 574 are respectively slidably connected in the corresponding slide grooves 54, the explosion-proof inner cylinder Screw rods 575 are rotatably arranged between the outer walls of 52 and the inner walls of the protective outer cylinder 51. The threads on the two screw rods 575 are in opposite directions. The outer parts of the two screw rods 575 are fixedly sleeved with second gears 576. The two second gears 576 are respectively meshed with the corresponding racks 573. The outer parts of the two screw rods 575 are threadedly sleeved with internal thread sleeves 577. The upper and lower parts of the two internal thread sleeves 577 are fixedly arranged with L-shaped rods 578. The ends of the four L-shaped rods 578 close to each other are all slid through the interior of the explosion-proof inner cylinder 52 and are fixedly arranged with arc-shaped clamping plates 579. The sides of the four arc-shaped clamping plates 579 close to each other are fixedly arranged with a plurality of rubber anti-slip strips. The sealing cover assembly 58 includes a sealing cover 581. The middle of the top of the sealing cover 581 is fixedly provided with The connecting sleeve 582 has an externally threaded tube 583 threadedly penetrated between the connecting sleeve 582 and the sealing cover 581, a sealing sleeve is fixedly arranged on the inner wall of the externally threaded tube 583, an adjusting disk 584 is fixedly arranged on the top of the externally threaded tube 583, a fastening bolt 585 is threadedly penetrated on one side of the connecting sleeve 582, a vertical tube 586 is rotatably arranged in the middle of the top of the adjusting disk 584, the interior of the vertical tube 586 is connected with the interior of the externally threaded tube 583, a pressure sensor 587 is fixedly arranged at the bottom of the vertical tube 586, a solenoid valve 588 is fixedly arranged at the top of the vertical tube 586, a hose 589 is fixedly connected to the top of the vertical tube 586, and one end of the hose 589 away from the sealing cover 581 is fixedly connected to the side wall of the corresponding vertical plate 6, and the ventilation mechanism 7 includes a hollow rod 71.The hollow rod 71 is fixedly connected to the top of the multi-gas path controller 11 and passes through the support shaft 2 and the inside of the working disk 3. Four branch pipes 72 are passed through the inside of the hollow rod 71. The bottoms of the four branch pipes 72 are respectively fixedly connected to the four gas outlet channels of the multi-gas path controller 11. An air guide disk assembly 73 is fixedly arranged between the hollow rod 71 and the tops of the four branch pipes 72. A connecting disk 74 is rotatably sleeved on the top of the air guide disk assembly 73. A plurality of through holes 75 are evenly opened in a circle inside the connecting disk 74. A plurality of through holes 75 are evenly fixedly arranged on the top of the connecting disk 74. L-shaped tubes 76, the interiors of the plurality of L-shaped tubes 76 are respectively connected to the corresponding through holes 75, the ends of the plurality of L-shaped tubes 76 that are away from each other are respectively fixedly connected to the side walls of the corresponding vertical plates 6 and are connected to the corresponding hoses 589, the air guide plate assembly 73 includes an air guide plate 731, the interior of the air guide plate 731 is evenly provided with four air supply cavities 732, the bottoms of the four air supply cavities 732 are respectively connected to the tops of the corresponding branch pipes 72, the interior of the air guide plate 731 is evenly provided with four exhaust cavities 733, and the exhaust cavities 733 and the air supply cavities 732 are alternately distributed in sequence.

[0056] Through the cooperation among the protective outer cylinder 51, the explosion-proof inner cylinder 52, the spring 56, the limit assembly 57 and the sealing cover assembly 58, when the aluminum alloy hydrogen storage bottle is placed into the explosion-proof inner cylinder 52, the self-gravity of the aluminum alloy hydrogen storage bottle can be used to drive the limit assembly 57 to work, and the aluminum alloy hydrogen storage bottle can be automatically and quickly clamped and fixed in the explosion-proof inner cylinder 52, thereby simplifying the operation process. In addition, during the test process, it can prevent the fragments generated by the explosion from splashing everywhere, thereby reducing the risk of accidents. Through the cooperation among the multi-gas circuit controller 11, the branch pipe 72, the gas guide plate assembly 73, the connecting plate 74, the L-shaped tube 76 and the pressure sensor 587, the air pump 10 works to discharge the gas through the multi-gas circuit controller 11, and the multi-gas circuit controller 11 performs diversion processing on the gas input into the air pump 10, so as to accurately control the flow direction and flow rate of the gas, so that the gas flows out through the four branch pipes 72 respectively, and the flow in each branch pipe 72 is controlled by the multi-gas circuit controller 11. The amount is different, so that different amounts of gas can be filled into the aluminum alloy hydrogen storage bottle at different stages. As the working disk 3 rotates, the aluminum alloy hydrogen storage bottle is sequentially connected to the four branch pipes 72, which can simulate the process of gradually increasing the amount of gas filled into the hydrogen storage bottle under actual working conditions, and test the performance of the hydrogen storage bottle under different pressures. Through the mutual cooperation between the external threaded tube 583, the chassis 571, the rack 573, the second gear 576, the internal threaded sleeve 577 and the arc clamping plate 579, the aluminum alloy hydrogen storage bottle is placed on the chassis 571, and the chassis 571 is pressed downward by the gravity of the aluminum alloy hydrogen storage bottle itself, and the rack 573 moves downward accordingly, so that the second gear 576 and the screw rod 575 rotate, and the internal threaded sleeve 577 and the arc clamping plate 579 move closer to one side of the hydrogen storage bottle. The four arc clamping plates 579 cooperate with each other to automatically clamp and limit aluminum alloy hydrogen storage bottles of different bottle sizes, and have a wide range of applications.

[0057] The embodiment of the present invention further provides a fatigue testing method for an aluminum alloy hydrogen storage bottle, using a fatigue testing device for an aluminum alloy hydrogen storage bottle. The specific method includes the following steps:

[0058] Step 1, open the lock 510 on the frontmost accommodating cylinder mechanism 5, remove the sealing cover 581 from the protective outer cylinder 51, and then place the aluminum alloy hydrogen storage bottle to be tested in the explosion-proof inner cylinder 52, and place the aluminum alloy hydrogen storage bottle on the chassis 571, and use the gravity of the aluminum alloy hydrogen storage bottle to press the chassis 571 downward, the spring 56 is compressed, and the rack 573 moves downward accordingly, so that the second gear 576 and the screw rod 575 rotate, and the internal threaded sleeve 577 and the arc clamping plate 579 move toward one side of the hydrogen storage bottle, and the four arc clamping plates 579 move closer to each other, gradually clamping the two sides of the aluminum alloy hydrogen storage bottle until the aluminum alloy hydrogen storage bottle cannot move downward. , complete the automatic clamping and limiting of the aluminum alloy hydrogen storage bottle, then re-place the sealing cover assembly 58 between the top of the protective outer cylinder 51 and the explosion-proof inner cylinder 52, close the lock buckle 510, lock the sealing cover assembly 58 at the top of the protective outer cylinder 51, then screw the fastening bolt 585 to make the fastening bolt 585 away from the external threaded tube 583, and then screw the adjusting disk 584 to move the external threaded tube 583 downward until it cannot be screwed, and use the external threaded tube 583 to completely seal the bottle mouth of the aluminum alloy hydrogen storage bottle, so that the bottle mouth of the aluminum alloy hydrogen storage bottle is connected to the external threaded tube 583, and then screw the fastening bolt 585 in the opposite direction to press against the external threaded tube 583;

[0059] Step 2, then start the servo motor 8 to drive the first gear 9 to rotate, and the gear ring 4, support shaft 2, working disk 3, accommodating cylinder mechanism 5, vertical plate 6, connecting disk 74 and L-shaped tube 76 rotate accordingly, and the accommodating cylinder mechanism 5 is rotated counterclockwise forty-five degrees and then paused for a set time. At this time, when the aluminum alloy hydrogen storage bottle is connected with the corresponding air supply cavity 732 and the corresponding branch pipe 72 through the L-shaped tube 76 and the through hole 75, the air pump 10 works to discharge the gas through the multi-gas path controller 11, wherein the multi-gas path controller 11 belongs to the prior art well known to those skilled in the art. The multi-gas path controller 11 is mainly composed of a shell, a control panel, a gas valve assembly, an air inlet channel and an air outlet channel. The multi-gas path controller 11 performs diversion processing on the gas input by the air pump 10, accurately controls the flow direction and flow rate of the gas, and allows the gas to pass through four of the outlet channels. The gas flows out through the four gas outlet channels, and the four gas outlet channels are respectively connected to the four branch pipes 72, that is, the gas flows out through the four branch pipes 72 respectively, and the flow rate in each branch pipe 72 is different. A set amount of gas is filled into the aluminum alloy hydrogen storage bottle through the corresponding branch pipe 72 per unit time. When the pressure in the aluminum alloy hydrogen storage bottle reaches the set value, the solenoid valve 588 is closed, and the servo motor 8 works again to drive the working disk 3 and the accommodating cylinder mechanism 5 to rotate. During the rotation of the accommodating cylinder mechanism 5, the pressure sensor 587 monitors the pressure change in the aluminum alloy hydrogen storage bottle in real time, and the accommodating cylinder mechanism 5 is rotated counterclockwise forty-five degrees and then paused for the set time, and then the solenoid valve 588 is opened. At this time, the L-shaped tube 76 and the through hole 75 are connected to the corresponding exhaust chamber 733, so that the gas in the aluminum alloy hydrogen storage bottle is completely discharged through the corresponding exhaust chamber 733;

[0060] Step 3, then start the servo motor 8 again, rotate the accommodating cylinder mechanism 5 counterclockwise for 45 degrees and pause again for a set time, the air pump 10 supplies air to the aluminum alloy hydrogen storage bottle again through the multi-air path controller 11, the corresponding branch pipe 72 and the corresponding air supply cavity 732, when the pressure in the aluminum alloy hydrogen storage bottle reaches the set value, close the solenoid valve 588, and the servo motor 8 works again;

[0061] Step 4. Repeat steps 2 and 3 to repeatedly inflate and exhaust the aluminum alloy hydrogen storage bottle, for a total of four inflations and four exhausts. During the four inflations, the amount of gas inflated each time increases sequentially to simulate the operation of repeatedly filling and discharging gas in the aluminum alloy hydrogen storage bottle under actual working conditions, test the performance of the aluminum alloy hydrogen storage bottle at different pressures, perform fatigue tests on the aluminum alloy hydrogen storage bottle, and use pressure sensor 587 to monitor the pressure change in the aluminum alloy hydrogen storage bottle after each inflation. If the pressure decreases, it means that the aluminum alloy hydrogen storage bottle is leaking, and the aluminum alloy hydrogen storage bottle is unqualified.

[0062] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fatigue testing device for aluminum alloy hydrogen storage bottles, characterized in that: include: A support frame (1) is placed on the ground, a support shaft (2) is rotatably arranged in the middle of the top of the support frame (1), a working disk (3) is fixedly arranged on the top of the support shaft (2), a gear ring (4) is fixedly arranged on the outer fixed sleeve of the support shaft (2), a plurality of vertical plates (6) are evenly fixedly arranged on the top of the working disk (3), a servo motor (8) is fixedly arranged on the top of the inner cavity of the support frame (1), and the output end of the servo motor (8) passes through the top of the support frame (1) and is fixedly arranged with a first gear (9) , the first gear (9) is meshed with the gear ring (4), an air pump (10) is fixedly arranged at the bottom of the inner cavity of the support frame (1), a multi-air path controller (11) is fixedly arranged at the exhaust end of the air pump (10), the top of the multi-air path controller (11) is fixedly connected to the bottom of the ventilation mechanism (7), an intelligent panel (12) is fixedly arranged on the right side of the upper front end of the support frame (1), and a plurality of ventilation holes (13) are opened at the bottom of the working disk (3) and directly below each accommodating cylinder mechanism (5); A plurality of accommodating cylinder mechanisms (5) are used to place the aluminum alloy hydrogen storage bottle and automatically clamp and limit the aluminum alloy hydrogen storage bottle, and the plurality of accommodating cylinder mechanisms (5) are evenly arranged in a circle outside the top of the working plate (3); The ventilation mechanism (7) is used to intermittently transport different amounts of gas into the aluminum alloy hydrogen storage bottle in the accommodating cylinder mechanism (5) to change the pressure in the aluminum alloy hydrogen storage bottle in different time periods. The ventilation mechanism (7) runs through the interior of the support shaft (2).

2. A fatigue testing device for an aluminum alloy hydrogen storage bottle according to claim 1, characterized in that: Each of the accommodating cylinder mechanisms (5) comprises a protective outer cylinder (51), the protective outer cylinder (51) being fixedly connected to the top of the working disk (3), an explosion-proof inner cylinder (52) being fixedly arranged at the bottom of the inner cavity of the protective outer cylinder (51), vertical grooves (53) being provided at the lower parts of both sides of the explosion-proof inner cylinder (52), sliding grooves (54) being provided at the upper outer walls of both sides of the explosion-proof inner cylinder (52), a plurality of exhaust ports (55) being evenly provided from top to bottom on the outer wall of the explosion-proof inner cylinder (52) and located between two adjacent sliding grooves (54), and the explosion-proof inner cylinder A plurality of springs (56) are evenly and fixedly arranged at the bottom of the inner cavity (52), a limit assembly (57) is arranged between the tops of the plurality of springs (56), a sealing cover assembly (58) is arranged between the tops of the protective outer tube (51) and the explosion-proof inner tube (52), a plurality of air outlets (59) connected to the corresponding air vents (13) are evenly arranged at the bottom of the protective outer tube (51) and outside the explosion-proof inner tube (52), and the outer walls of the protective outer tube (51) and the sealing cover assembly (58) are connected via a plurality of lock buckles (510).

3. A fatigue testing device for an aluminum alloy hydrogen storage bottle according to claim 2, characterized in that: The limiting assembly (57) comprises a chassis (571), the bottom of the chassis (571) is fixedly connected to the tops of the plurality of springs (56), T-shaped blocks (572) are fixedly arranged on both sides of the chassis (571), the two T-shaped blocks (572) respectively slide through the corresponding vertical slots (53), the top rear ends of the two T-shaped blocks (572) are fixedly arranged with racks (573), and the tops of the two racks (573) on the sides close to each other are fixedly arranged with sliders (574).

4. A fatigue testing device for an aluminum alloy hydrogen storage bottle according to claim 3, characterized in that: The two sliders (574) are respectively slidably connected in the corresponding slide grooves (54), and screw rods (575) are rotatably arranged between the outer walls of the explosion-proof inner tube (52) and the inner walls of the protective outer tube (51). The threads on the two screw rods (575) are in opposite directions. The outsides of the two screw rods (575) are fixedly sleeved with second gears (576), and the two second gears (576) are respectively meshed with corresponding racks (573). The outsides of the two screw rods (575) are threadedly sleeved with internal thread sleeves (577).

5. A fatigue testing device for an aluminum alloy hydrogen storage bottle according to claim 4, characterized in that: The upper and lower parts of the two internal threaded sleeves (577) are fixedly provided with L-shaped rods (578), and the ends of the four L-shaped rods (578) close to each other are slidably penetrated into the interior of the explosion-proof inner tube (52) and are fixedly provided with arc-shaped clamping plates (579), and the sides of the four arc-shaped clamping plates (579) close to each other are fixedly provided with a plurality of rubber anti-slip strips.

6. A fatigue testing device for an aluminum alloy hydrogen storage bottle according to claim 2, characterized in that: The sealing cover assembly (58) comprises a sealing cover (581), a connecting sleeve (582) is fixedly arranged in the middle of the top of the sealing cover (581), an externally threaded tube (583) is threadedly penetrated between the connecting sleeve (582) and the inside of the sealing cover (581), a sealing sleeve is fixedly arranged on the inner wall of the externally threaded tube (583), an adjusting disk (584) is fixedly arranged on the top of the externally threaded tube (583), a fastening bolt (585) is threadedly penetrated on one side of the connecting sleeve (582), and a vertical tube (586) is rotatably arranged in the middle of the top of the adjusting disk (584).

7. A fatigue testing device for an aluminum alloy hydrogen storage bottle according to claim 6, characterized in that: The interior of the vertical pipe (586) is connected to the interior of the external threaded pipe (583), a pressure sensor (587) is fixedly installed at the lower part of the vertical pipe (586), a solenoid valve (588) is fixedly installed at the upper part of the vertical pipe (586), and a hose (589) is fixedly connected to the top of the vertical pipe (586), and one end of the hose (589) away from the sealing cover (581) is fixedly connected to the side wall of the corresponding vertical plate (6).

8. A fatigue testing device for an aluminum alloy hydrogen storage bottle according to claim 7, characterized in that: The ventilation mechanism (7) comprises a hollow rod (71), the hollow rod (71) being fixedly connected to the top of the multi-gas-path controller (11) and passing through the support shaft (2) and the inside of the working disk (3), four branch pipes (72) passing through the inside of the hollow rod (71), the bottoms of the four branch pipes (72) being fixedly connected to four gas outlet channels of the multi-gas-path controller (11), and an air guide disk assembly (73) being fixedly arranged between the hollow rod (71) and the tops of the four branch pipes (72). The top of the air guide plate assembly (73) is rotatably sleeved with a connecting plate (74), and a plurality of through holes (75) are evenly arranged in a circle inside the connecting plate (74). A plurality of L-shaped tubes (76) are evenly fixedly arranged in a circle on the top of the connecting plate (74), and the interiors of the plurality of L-shaped tubes (76) are respectively connected to the corresponding through holes (75), and the ends of the plurality of L-shaped tubes (76) that are away from each other are respectively fixedly connected to the side walls of the corresponding vertical plates (6) and are connected to the corresponding hoses (589).

9. A fatigue testing device for an aluminum alloy hydrogen storage bottle according to claim 8, characterized in that: The air guide disk assembly (73) comprises an air guide disk (731), four air supply cavities (732) are evenly arranged inside the air guide disk (731), the bottoms of the four air supply cavities (732) are respectively connected to the tops of the corresponding branch pipes (72), and four exhaust cavities (733) are evenly arranged inside the air guide disk (731), and the exhaust cavities (733) and the air supply cavities (732) are alternately distributed in sequence.

10. A fatigue testing method for an aluminum alloy hydrogen storage bottle, characterized in that: Using the fatigue testing device for an aluminum alloy hydrogen storage bottle as claimed in claim 7, the method comprises the following steps: Step 1, open the lock buckle (510) on the frontmost accommodating cylinder mechanism (5), remove the sealing cover assembly (58) from the protective outer cylinder (51), and then place the aluminum alloy hydrogen storage bottle to be tested in the explosion-proof inner cylinder (52). During the downward movement of the aluminum alloy hydrogen storage bottle in the explosion-proof inner cylinder (52), press down the limit assembly (57), and the spring (56) is compressed. During the downward movement of the limit assembly (57), the two sides of the aluminum alloy hydrogen storage bottle are gradually clamped until the aluminum alloy hydrogen storage bottle cannot move downward, and the limit assembly (57) automatically clamps and limits it. Then, the sealing cover assembly (58) is re-placed between the top of the protective outer cylinder (51) and the explosion-proof inner cylinder (52), close the lock buckle (510), and lock the sealing cover assembly (58) at the top of the protective outer cylinder (51). Then, adjust the sealing cover assembly (58) so that the sealing cover assembly (58) is connected to the bottle mouth of the aluminum alloy hydrogen storage bottle; Step 2, then start the servo motor (8) to drive the first gear (9) to rotate, and the gear ring (4), the support shaft (2), the working disk (3) and the accommodating cylinder mechanism (5) rotate accordingly. After the accommodating cylinder mechanism (5) is rotated counterclockwise by 45 degrees, it is paused for a set time. The air pump (10) works to supply gas to the aluminum alloy hydrogen storage bottle through the multi-gas path controller (11), the ventilation mechanism (7) and the sealing cover assembly (58). When the pressure in the aluminum alloy hydrogen storage bottle reaches the set value, the solenoid valve (588) is closed, and the servo motor (8) works again to drive the working disk (3) and the accommodating cylinder mechanism (5) to rotate. During the rotation of the accommodating cylinder mechanism (5), the pressure sensor (587) monitors the pressure change in the aluminum alloy hydrogen storage bottle in real time. After the accommodating cylinder mechanism (5) is rotated counterclockwise by another 45 degrees, it is paused for a set time again, and then the solenoid valve (588) is opened to completely discharge the gas in the aluminum alloy hydrogen storage bottle. Step 3, then start the servo motor (8) again, rotate the accommodating cylinder mechanism (5) counterclockwise for 45 degrees and then pause for a set time, the air pump (10) supplies air to the aluminum alloy hydrogen storage bottle again through the multi-air path controller (11), the ventilation mechanism (7) and the sealing cover assembly (58), when the pressure in the aluminum alloy hydrogen storage bottle reaches the set value, close the solenoid valve (588), and the servo motor (8) works again; Step 4, repeating the operations of step 2 and step 3 to repeatedly inflate and exhaust the aluminum alloy hydrogen storage bottle, and performing four times of inflation and exhaust in total. During the four inflation processes, the amount of gas inflated each time increases sequentially, simulating the operation of repeatedly filling and exhausting gas in the aluminum alloy hydrogen storage bottle under actual working conditions, performing fatigue testing on the aluminum alloy hydrogen storage bottle, and using a pressure sensor (587) to monitor the pressure change in the aluminum alloy hydrogen storage bottle after each inflation. If the pressure decreases, it means that the aluminum alloy hydrogen storage bottle is leaking, and the aluminum alloy hydrogen storage bottle is unqualified.

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