Automatic detection device for water pressure of gas cylinder

Abstract

The invention discloses a gas cylinder water pressure automatic detection device which is characterized in that two conveying rails are parallel to each other and are transversely arranged, and four stations, namely an input station, a water injection station, a test station and an output station, are arranged on each conveying rail; a water injection mechanism is arranged on the water injection station, and a water jacket cover mounting mechanism and a pit are arranged on the test station; the conveying track is provided with a plurality of conveying trolleys, the conveying trolleys are used for conveying tested gas cylinders, the water injection mechanism is used for injecting a set amount of water into the input tested gas cylinders, the water jacket is composed of barrels and a water jacket cover, the barrels are arranged in a pit, and the water jacket cover mounting mechanism stretches across the upper portion of the pit. The plurality of water jacket covers are arranged on the water jacket cover mounting mechanism in a manner of moving up and down, and the water jacket cover mounting mechanism is used for mounting an input tested gas cylinder on the water jacket covers and driving the water jacket covers to move downwards to be connected with the barrel body, so that the tested gas cylinder is positioned in the water jacket. According to the invention, the problems in the prior art can be effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary detection in gas cylinder production, and particularly to an automatic hydrostatic testing device for gas cylinders. Background Art

[0002] As a loading tool for various gases, gas cylinders are widely used in people's daily lives and industrial production. The number of gas cylinders is huge, and they are often moved and repeatedly refilled. The usage environment is often relatively harsh. Once an explosion occurs, it will cause serious losses to people's lives and property and have a huge impact on social safety. Therefore, national standards stipulate that hydrostatic tests must be carried out during the production process of gas cylinders. At present, the hydrostatic testing devices for gas cylinders in our country mainly rely on manual operation, which is troublesome and has low detection efficiency. Summary of the Invention

[0003] The purpose of the present invention is to solve the deficiencies of the prior art and provide an automatic hydrostatic testing device for gas cylinders, which can effectively solve the problems existing in the prior art.

[0004] The present invention is achieved through the following technical solutions: An automatic hydrostatic testing device for gas cylinders includes a conveying track, a conveying trolley, a water injection mechanism, a water jacket cover installation mechanism, a water jacket, and a pit. The two conveying tracks are relatively parallel and arranged horizontally, and there are four workstations thereon, namely an input workstation, a water injection workstation, a testing workstation, and an output workstation; the water injection mechanism is arranged at the water injection workstation, and the water jacket cover installation mechanism and the pit are arranged at the testing workstation; several conveying trolleys are arranged on the conveying track, and the conveying trolleys are used to convey the gas cylinders to be tested. The water injection mechanism is used to inject a set amount of water into the gas cylinders to be tested input. The water jacket is composed of a cylinder body and a water jacket cover. Several cylinder bodies are arranged in the pit in a linear arrangement. The water jacket cover installation mechanism straddles above the pit, and several water jacket covers are arranged on the water jacket cover installation mechanism so as to be movable up and down. One cylinder body corresponds to one water jacket cover. The water jacket cover installation mechanism is used to install the gas cylinders to be tested input on the water jacket covers and drive the water jacket covers to move downward to be connected with the cylinder bodies, so that the gas cylinders to be tested are located inside the water jackets; a pressure pipe is arranged on the water jacket covers, and the pressure pipe is used to be connected with an external pressurizing device to pressurize the gas cylinders to be tested through the pressurizing device. A drain pipe is arranged on the cylinder bodies, and the drain pipe is used to be connected with a water container arranged on an external testing operation table to test the deformation amount and pressure-bearing capacity of the gas cylinders to be tested through the testing operation table.

[0005] Furthermore, according to the automatic hydrostatic testing device for gas cylinders of the invention, the conveying trolley comprises a frame, a driving motor, a driving gear and a first clamping mechanism. A number of gas cylinder placement grooves arranged in a straight line are provided on the frame. The first clamping mechanism is arranged in the gas cylinder placement grooves and is used for clamping the gas cylinders to be tested placed in the gas cylinder placement grooves. The driving motor is arranged at the bottom of the frame, and the driving gear is arranged on the output shaft of the driving motor. The driving gear is used for cooperating with a rack provided on the conveying track, and the driving motor is used for driving the driving gear to rotate, so as to drive the conveying trolley to move left and right along the conveying track for station switching.

[0006] Furthermore, according to the automatic hydrostatic testing device for gas cylinders of the invention, a gas cylinder seat is arranged at the bottom of the gas cylinder placement groove, and an inlet is arranged at the top. A rubber ring is arranged on the inlet; the gas cylinders to be tested enter the gas cylinder placement groove through the inlet and are supported by the gas cylinder seat.

[0007] Furthermore, according to the automatic hydrostatic testing device for gas cylinders of the invention, the water injection mechanism comprises a water injection frame, a mounting bracket, a first up-and-down movement mechanism, a water injection joint and a second clamping mechanism. The water injection frame spans above the conveying track. A number of the mounting brackets are arranged at the top of the water injection frame. The first up-and-down movement mechanism is arranged at the top of the mounting bracket, and the second clamping mechanism is arranged at the bottom of the mounting bracket. The water injection joint is arranged at the bottom of the first up-and-down movement mechanism. A water injection channel and an exhaust channel are arranged in the water injection joint. One end of the water injection channel is connected with a water injection hose, and the water injection hose is used for inserting into the gas cylinder to be tested. The other end of the water injection channel is used for connecting an external water supply device. The water supply device is used for providing a set amount of water. The second clamping mechanism is used for clamping the bottle mouth of the input gas cylinder to be tested, so that the bottle mouth of the gas cylinder to be tested is aligned with the water injection joint. The first up-and-down movement mechanism is used for driving the water injection joint to move downwards to dock with the bottle mouth of the gas cylinder to be tested.

[0008] Furthermore, according to the automatic hydrostatic testing device for gas cylinders of the invention, the water jacket cover installation mechanism includes a water jacket cover installation frame and a water jacket cover working component. A plurality of the water jacket cover working components are arranged on the water jacket cover installation frame and are arranged above the pit through the water jacket cover installation frame. The water jacket cover working component includes a third clamping mechanism, a thread tightening mechanism, a second up-and-down moving mechanism and a water jacket cover. The second up-and-down moving mechanism is arranged at the top of the water jacket cover installation frame, and the water jacket cover is arranged at the bottom of the second up-and-down moving mechanism. The second up-and-down moving mechanism is used to drive the water jacket cover to move up and down so that the water jacket cover is located at three different positions, which are the initial position, the installation position and the end position respectively. The third clamping mechanism and the thread tightening mechanism are respectively arranged on the water jacket cover installation frame and are located on both sides of the installation position. The third clamping mechanism is used to clamp the mouth of the tested gas cylinder input to restrict the axial rotation of the tested gas cylinder, and the thread tightening mechanism is used to drive the rotatable internal thread sleeve provided on the water jacket cover to rotate so that the water jacket cover is threadedly connected with the tested gas cylinder.

[0009] Furthermore, according to the automatic hydrostatic testing device for gas cylinders of the invention, a cylindrical gear is sleeved on the internal thread sleeve. The thread tightening mechanism includes a first fixed bracket, a driving gear mechanism and a first front-and-back moving mechanism. The driving gear mechanism is arranged at the top of the first front-and-back moving mechanism and is arranged at the top of the first fixed bracket through the first front-and-back moving mechanism. The first front-and-back moving mechanism is used to drive the driving gear mechanism to move back and forth to realize meshing with the cylindrical gear.

[0010] Furthermore, according to the automatic hydrostatic testing device for gas cylinders of the invention, the third clamping mechanism includes a second fixed bracket, a clamping component and a second front-and-back moving mechanism. The clamping component is arranged at the top of the second front-and-back moving mechanism and is arranged at the top of the second fixed bracket through the second front-and-back moving mechanism. The second front-and-back moving mechanism is used to drive the clamping component to move forward, and the clamping component is used to clamp the mouth of the tested gas cylinder.

[0011] Furthermore, according to the automatic hydrostatic testing device for gas cylinders of the invention, rubber coatings are provided on the surfaces of the first clamping mechanism, the second clamping mechanism and the third clamping mechanism that contact the tested gas cylinder.

[0012] Furthermore, according to the automatic hydrostatic testing device for gas cylinders of the invention, four cylinders are arranged in a straight line in the pit. Four gas cylinder placement grooves are correspondingly arranged on the conveying trolley. Four installation brackets are correspondingly arranged at the top of the water injection frame. Four water jacket cover working components are correspondingly arranged on the water jacket cover installation frame.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: automatic water injection and automatic installation of the water jacket cover are realized, thereby reducing the dependence on manual operation and further improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a perspective view of the present invention.

[0015] Figure 2 is a top view of the present invention.

[0016] Figure 3 is a schematic structural view of the third clamping mechanism of the water jacket cover installation mechanism of the present invention when clamping the gas cylinder to be tested input by the conveying trolley.

[0017] Figure 4 is Figure 3 an enlarged structural view of the part within the dashed box in

[0018] Figure 5 is a perspective view of the thread tightening mechanism of the present invention.

[0019] Figure 6 is a perspective view of the third clamping mechanism of the present invention.

[0020] Figure 7 is a perspective view of the conveying trolley of the present invention.

[0021] Figure 8 is a left view of the conveying trolley of the present invention.

[0022] Figure 9 is a left view of the water injection mechanism of the present invention.

[0023] Figure 10 is Figure 9 a schematic cross-sectional structural view of the first up-and-down moving mechanism and the water injection joint in

[0024] In the figure: Conveyor track 1, conveyor trolley 2, vehicle frame 21, gas cylinder placement groove 211, gas cylinder seat 2111, inlet 2112, mounting plate 2113, drive motor 22, drive gear 23, first clamping mechanism 24, drive cylinder 241, V-shaped clamping plate 242, water injection mechanism 3, water injection frame 31, mounting bracket 32, first vertical movement mechanism 33, water injection joint 34, water injection channel 341, exhaust channel 342, second clamping mechanism 35, water jacket cover installation mechanism 4, water jacket cover installation frame 41, water jacket cover working component 42, third clamping mechanism 421, second fixed bracket 4211, clamping component 4212, second front-back movement mechanism 4213, screw tightening mechanism 422, second vertical movement mechanism 423, water jacket 5, cylinder body 51, water jacket cover 52, pressure pipe 521, internal thread sleeve 522, cylindrical gear 523, pit 6, gas cylinder to be tested 7, rubber ring 8, water injection hose 9, Embodiment

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figures 1 - 10 , the present invention provides a technical solution: An automatic hydrostatic testing device for gas cylinders, comprising a conveying track 1, a conveying trolley 2, a water injection mechanism 3, a water jacket cover installation mechanism 4, a water jacket 5 and a pit 6. Two conveying tracks 1 are relatively parallel and arranged horizontally, with four workstations thereon, namely an input workstation, a water injection workstation, a testing workstation and an output workstation. The water injection mechanism 3 is arranged at the water injection workstation, and the water jacket cover installation mechanism 4 and the pit 6 are arranged at the testing workstation. A number of conveying trolleys 2 are arranged on the conveying track 1, and the conveying trolleys 2 are used to convey the gas cylinders 7 to be tested. The water injection mechanism 3 is used to inject a set amount of water into the gas cylinders 7 to be tested input. The water jacket 5 is composed of a cylinder body 51 and a water jacket cover 52. A number of cylinder bodies 51 are arranged in the pit 6 and arranged in a line. The water jacket cover installation mechanism 4 straddles above the pit 6, and a number of water jacket covers 52 are arranged on the water jacket cover installation mechanism 4 so as to be movable up and down. One cylinder body 51 corresponds to one water jacket cover 52. The water jacket cover installation mechanism 4 is used to install the gas cylinders 7 to be tested input on the water jacket covers 52 and drive the water jacket covers 52 to move downward to be connected with the cylinder bodies 51, so that the gas cylinders 7 to be tested are located in the water jacket 5. A pressure pipe 521 is arranged on the water jacket cover 52, and the pressure pipe 521 is used to be connected with an external pressurizing device to pressurize the gas cylinders 7 to be tested through the pressurizing device. A drain pipe is arranged on the cylinder body 51, and the drain pipe is used to be connected with a water container arranged on an external testing operation table to test the deformation amount and pressure-bearing capacity of the gas cylinders 7 to be tested through the testing operation table. Specifically, a pressing mechanism is arranged at the top of the cylinder body 51, and the pressing mechanism is used to press and fix the water jacket cover 52 on the top of the cylinder body 51. A sealing ring is arranged between the cylinder body 51 and the water jacket cover 52 for sealing. The pressing mechanism comprises a pressing block and a cylinder, and the cylinder drives the pressing block to turn over and press against the top surface of the water jacket cover 52, so as to realize the pressing of the water jacket cover 52. Thus, the dependence on manual operation is reduced, and the production efficiency is further improved.

[0027] Further, the transfer cart 2 includes a frame 21, a drive motor 22, a drive gear 23, and a first clamping mechanism 24. A number of gas cylinder placement grooves 211 arranged in a straight line are provided on the frame 21. The first clamping mechanism 24 is arranged in the gas cylinder placement groove 211 and is used to clamp the test gas cylinder 7 placed in the gas cylinder placement groove 211. The drive motor 22 is arranged at the bottom of the frame 21, and the drive gear 23 is arranged on the output shaft of the drive motor 22. The drive gear 23 is used to cooperate with the rack 11 provided on the transfer track 1. The drive motor 22 is used to drive the drive gear 23 to rotate, so as to drive the transfer cart 2 to move left and right along the transfer track 1 for station switching. Specifically, a gas cylinder seat 2111 is provided at the bottom of the gas cylinder placement groove 211, and an inlet 2112 is provided at the top. A rubber ring 8 is provided on the inlet 2112. The rubber ring 8 is used to protect the test gas cylinder 7 to prevent the inlet 2112 from scratching the surface of the test gas cylinder 7. The gas cylinder seat 2111 is made of rubber material to prevent scratching the surface of the test gas cylinder 7. In this embodiment, the first clamping mechanism 24 includes a drive cylinder 241 and a V-shaped clamping plate 242. Two opposite mounting plates 2113 are provided below the inlet 2112 of the gas cylinder placement groove 211. Drive cylinders 241 are symmetrically arranged on the two mounting plates 2113. A V-shaped clamping plate 242 is arranged at the end of the piston rod of the drive cylinder 241. A rubber pad is arranged on the surface of the V-shaped clamping plate 242 in contact with the test gas cylinder 7. The test gas cylinder 7 enters the gas cylinder placement groove 211 through the inlet 2112, is supported by the gas cylinder seat 2111, and is clamped and fixed in the gas cylinder placement groove 211 by the first clamping mechanism 24. The first clamping mechanism 24 makes the test gas cylinder 7 located at the center of the gas cylinder placement groove 211 to prevent the test gas cylinder 7 from tipping or shifting during transportation.

[0028] Furthermore, the water injection mechanism 3 includes a water injection frame 31, a mounting bracket 32, a first vertical movement mechanism 33, a water injection joint 34, and a second clamping mechanism 35. The water injection frame 31 spans above the conveying track 1. A plurality of mounting brackets 32 are provided at the top of the water injection frame 31. A first vertical movement mechanism 33 is provided at the top of the mounting bracket 32. A second clamping mechanism 35 is provided at the bottom of the mounting bracket 32. The water injection joint 34 is provided at the bottom of the first vertical movement mechanism 33. A water injection channel 341 and an exhaust channel 342 are provided in the water injection joint 34. One end of the water injection channel 341 is connected to a water injection hose 9. The water injection hose 9 is used to insert into the gas cylinder 7 to be tested. The other end of the water injection channel 341 is used to connect to an external water supply device. The water supply device is used to provide a set amount of water. The second clamping mechanism 35 is used to clamp the mouth of the input gas cylinder 7 to be tested, so that the mouth of the gas cylinder 7 to be tested is aligned with the water injection joint 34. The first vertical movement mechanism 33 is used to drive the water injection joint 34 to move downward to dock with the mouth of the gas cylinder 7 to be tested, and at the same time, the water injection hose 9 is inserted into the gas cylinder 7 to be tested. The exhaust channel 342 is used to exhaust gas during the water injection process to improve the water injection efficiency. Specifically, the first vertical movement mechanism 33 is provided at the top of the mounting bracket 32, the second clamping mechanism 35 is provided at the bottom of the mounting bracket 32, and the mounting bracket 32 is provided at the top of the water injection frame 31. The first vertical movement mechanism 33 and the second clamping mechanism 35 are integrated on the mounting bracket 32 and are installed and fixed on the water injection frame 31 through the mounting bracket 32, making installation and maintenance more convenient.

[0029] Furthermore, the water jacket cover installation mechanism 4 includes a water jacket cover installation frame 41 and a water jacket cover working component 42. A plurality of water jacket cover working components 42 are arranged on the water jacket cover installation frame 41 and are arranged above the pit 6 through the water jacket cover installation frame 41. The water jacket cover working component 42 includes a third clamping mechanism 421, a screw tightening mechanism 422, a second up and down movement mechanism 423, and a water jacket cover 52. The second up and down movement mechanism 423 is arranged at the top of the water jacket cover installation frame 41, and the water jacket cover 52 is arranged at the bottom of the second up and down movement mechanism 423. The second up and down movement mechanism 423 is used to drive the water jacket cover 52 to move up and down so that the water jacket cover 52 is located at three different positions, which are the initial position, the installation position, and the end position respectively; the third clamping mechanism 421 and the screw tightening mechanism 422 are respectively arranged on the water jacket cover installation frame 41 and are located on both sides of the installation position. The third clamping mechanism 421 is used to clamp the bottle mouth of the input test gas cylinder 7 so that the bottle mouth of the test gas cylinder 7 is aligned with the water jacket cover 52, and at the same time, the axial rotation of the test gas cylinder 7 is restricted. The screw tightening mechanism 422 is used to drive the rotatable internal thread sleeve 522 provided on the water jacket cover 52 to rotate so that the water jacket cover 52 is threadedly connected to the test gas cylinder 7. Specifically, a cylindrical gear 523 is sleeved on the internal thread sleeve 522. The screw tightening mechanism 422 includes a first fixed bracket 4221, a driving gear mechanism 4222, and a first front and back movement mechanism 4223. The driving gear mechanism 4222 is arranged at the top of the first front and back movement mechanism 4223 and is arranged at the top of the first fixed bracket 4221 through the first front and back movement mechanism 4223. The first front and back movement mechanism 4223 is used to drive the driving gear mechanism 4222 to move back and forth to achieve meshing with the cylindrical gear 523; in this embodiment, the driving gear mechanism 4222 includes a driving gear 23, a driving motor 22, and a speed reducer. The driving gear 23 is connected to the output shaft of the driving motor 22 through the speed reducer. The driving gear 23 is used to mesh with the cylindrical gear 523. The driving motor 22 drives the cylindrical gear 523 to rotate, so that the internal thread sleeve 522 is threadedly connected to the bottle mouth of the test gas cylinder 7, thereby completing the installation of the water jacket cover 52. Then, the second up and down movement mechanism 423 drives the water jacket cover 52 to move to the end position. The water jacket cover 52 located at the end position covers the upper part of the cylinder body 51. At this time, the pressing mechanism on the cylinder body 51 presses the water jacket cover 52 on the cylinder body 51.The third clamping mechanism 421 includes a second fixed bracket 4211, a clamping assembly 4212, and a second forward and backward movement mechanism 4213. The clamping assembly 4212 is arranged on the top of the second forward and backward movement mechanism 4213 and is arranged on the top of the second fixed bracket 4211 through the second forward and backward movement mechanism 4213. The second forward and backward movement mechanism 4213 is used to drive the clamping assembly 4212 to move forward. The clamping assembly 4212 is used to clamp the mouth of the gas cylinder 7 to be tested. During the operation of the thread tightening mechanism 422, the gas cylinder 7 to be tested is prevented from axially rotating under force, further improving the installation efficiency.

[0030] Furthermore, rubber coatings are provided on the surfaces of the first clamping mechanism 24, the second clamping mechanism 35, and the third clamping mechanism 421 that come into contact with the gas cylinder 7 to be tested to protect the surface of the gas cylinder 7 to be tested.

[0031] In this embodiment, four cylinders 51 arranged in a straight line are provided in the pit 6. Four gas cylinder placement slots 211 are correspondingly provided on the conveying trolley 2. Four mounting brackets 32 are correspondingly provided on the top of the water injection frame 31. Four water jacket cover working components 42 are correspondingly provided on the water jacket cover mounting frame 41. Through the above settings, four gas cylinders 7 to be tested can be operated at one time, which can greatly improve the test efficiency. Of course, it can also be one or more, which can be specifically set according to the size of the on-site area.

[0032] During operation, four test gas cylinders 7 are correspondingly placed in four gas cylinder placement grooves 211 on the conveying trolley 2 and clamped and positioned by the first clamping mechanism 24. The conveying trolley 2 is input from the input station and conveyed to the water injection station by the conveying trolley 2. The water injection mechanism 3 operates, and the second clamping mechanism 35 thereon clamps the bottle mouth of the test gas cylinder 7 at the corresponding position, so that the bottle mouth of the test gas cylinder 7 is aligned with the water injection joint 34. The first up-and-down moving mechanism 33 is used to drive the water injection joint 34 to move downwards to dock with the bottle mouth of the test gas cylinder 7. At the same time, the water injection hose 9 is inserted into the test gas cylinder 7. The water supply device supplies a set amount of water to be injected into the test gas cylinder 7 through the water injection hose 9. After the water injection is completed, the water injection mechanism 3 resets. The test gas cylinder 7 is conveyed to the test station by the conveying trolley 2. The water jacket cover working assembly 42 operates, and the third clamping mechanism 421 thereon clamps the bottle mouth of the test gas cylinder 7 at the corresponding position, so that the bottle mouth of the test gas cylinder 7 is aligned with the water jacket cover 51. At the same time, the second up-and-down moving mechanism 423 drives the water jacket cover 52 to move to the installation position to engage with the thread tightening mechanism 422. The thread tightening mechanism 422 drives the rotatable internal thread sleeve 522 provided on the water jacket cover 52 to rotate, so that the water jacket cover 52 is threadedly connected to the test gas cylinder 7. At this time, the conveying trolley 2 moves to the output station, and then the second up-and-down moving mechanism 423 drives the water jacket cover 52 to move to the end position. The water jacket cover 52 located at the end position covers above the cylinder body 51. At this time, the pressing mechanism on the cylinder body 51 presses the water jacket cover 52 onto the cylinder body 51. Then, the test gas cylinder 7 is pressurized by the pressurizing device, and the deformation amount and pressure-bearing capacity of the test gas cylinder 7 are tested through the test operation console.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic hydrostatic testing device for gas cylinders, characterized in that, It includes a conveying track, a conveying trolley, a water injection mechanism, a water jacket cover installation mechanism, a water jacket and a pit. The two conveying tracks are relatively parallel and arranged horizontally, and there are four workstations thereon, namely an input workstation, a water injection workstation, a testing workstation and an output workstation. The water injection mechanism is arranged at the water injection workstation, and the water jacket cover installation mechanism and the pit are arranged at the testing workstation. A number of the conveying trolleys are arranged on the conveying track. The conveying trolley is used for conveying the gas cylinders to be tested. The water injection mechanism is used for injecting a set amount of water into the gas cylinders to be tested that are input. The water jacket is composed of a cylinder body and a water jacket cover. A number of the cylinder bodies are arranged in the pit in a straight line. The water jacket cover installation mechanism straddles above the pit. A number of the water jacket covers are arranged on the water jacket cover installation mechanism so as to be movable up and down. One cylinder body corresponds to one water jacket cover. The water jacket cover installation mechanism is used for installing the gas cylinders to be tested that are input on the water jacket covers and driving the water jacket covers to move downward to be connected with the cylinder bodies, so that the gas cylinders to be tested are located inside the water jackets. A pressure pipe is arranged on the water jacket cover. The pressure pipe is used for connecting with an external pressurizing device to pressurize the gas cylinders to be tested through the pressurizing device. A drain pipe is arranged on the cylinder body. The drain pipe is used for connecting with a water container arranged on an external testing operation table to test the deformation amount and pressure bearing capacity of the gas cylinders to be tested through the testing operation table.

2. The automatic hydrostatic testing device for gas cylinders according to claim 1, characterized in that, The conveying trolley includes a vehicle frame, a driving motor, a driving gear and a first clamping mechanism. A number of gas cylinder placement grooves arranged in a straight line are arranged on the vehicle frame. The first clamping mechanism is arranged in the gas cylinder placement grooves. The first clamping mechanism is used for clamping the gas cylinders to be tested placed in the gas cylinder placement grooves. The driving motor is arranged at the bottom of the vehicle frame. The driving gear is arranged on the output shaft of the driving motor. The driving gear is used for cooperating with a rack arranged on the conveying track. The driving motor is used for driving the driving gear to rotate, so as to drive the conveying trolley to move left and right along the conveying track for workstation switching.

3. The automatic hydrostatic testing device for gas cylinders according to claim 2, characterized in that, A gas cylinder seat is arranged at the bottom of the gas cylinder placement groove, and an inlet is arranged at the top. A rubber ring is arranged on the inlet. The gas cylinders to be tested enter the gas cylinder placement grooves through the inlets and are supported by the gas cylinder seats.

4. The automatic hydrostatic testing device for gas cylinders according to claim 2, characterized in that, The water injection mechanism includes a water injection frame, a mounting bracket, a first vertical movement mechanism, a water injection joint, and a second clamping mechanism. The water injection frame spans above the conveying track. A number of the mounting brackets are provided at the top of the water injection frame. The first vertical movement mechanism is provided at the top of the mounting bracket. The second clamping mechanism is provided at the bottom of the mounting bracket. The water injection joint is provided at the bottom of the first vertical movement mechanism. A water injection channel and an exhaust channel are provided in the water injection joint. One end of the water injection channel is connected to a water injection hose, which is used to insert into the gas cylinder to be tested. The other end of the water injection channel is used to connect to an external water supply device, and the water supply device is used to provide a set amount of water. The second clamping mechanism is used to clamp the mouth of the input gas cylinder to be tested, so that the mouth of the gas cylinder to be tested is aligned with the water injection joint. The first vertical movement mechanism is used to drive the water injection joint to move downwards to dock with the mouth of the gas cylinder to be tested.

5. The automatic hydrostatic testing device for gas cylinders according to claim 4, characterized in that, The water jacket cover installation mechanism includes a water jacket cover installation frame and a water jacket cover working component. A number of the water jacket cover working components are provided on the water jacket cover installation frame and are arranged above the pit through the water jacket cover installation frame. The water jacket cover working component includes a third clamping mechanism, a thread tightening mechanism, a second vertical movement mechanism, and a water jacket cover. The second vertical movement mechanism is provided at the top of the water jacket cover installation frame. The water jacket cover is provided at the bottom of the second vertical movement mechanism. The second vertical movement mechanism is used to drive the water jacket cover to move up and down, so that the water jacket cover is located at three different positions, which are the initial position, the installation position, and the end position respectively. The third clamping mechanism and the thread tightening mechanism are respectively provided on the water jacket cover installation frame and are located on both sides of the installation position. The third clamping mechanism is used to clamp the mouth of the input gas cylinder to be tested to restrict the axial rotation of the gas cylinder to be tested. The thread tightening mechanism is used to drive the rotatable internal thread sleeve provided on the water jacket cover to rotate, so that the water jacket cover is threadedly connected to the gas cylinder to be tested.

6. The automatic hydrostatic testing device for gas cylinders according to claim 5, characterized in that, A cylindrical gear is sleeved on the internal thread sleeve. The thread tightening mechanism includes a first fixed bracket, a driving gear mechanism, and a first forward and backward movement mechanism. The driving gear mechanism is provided at the top of the first forward and backward movement mechanism and is arranged at the top of the first fixed bracket through the first forward and backward movement mechanism. The first forward and backward movement mechanism is used to drive the driving gear mechanism to move forward and backward to engage with the cylindrical gear.

7. The automatic hydrostatic testing device for gas cylinders according to claim 5, characterized in that, The third clamping mechanism includes a second fixed bracket, a clamping component, and a second forward and backward movement mechanism. The clamping component is provided at the top of the second forward and backward movement mechanism and is arranged at the top of the second fixed bracket through the second forward and backward movement mechanism. The second forward and backward movement mechanism is used to drive the clamping component to move forward. The clamping component is used to clamp the mouth of the gas cylinder to be tested.

8. The automatic hydrostatic testing device for gas cylinders according to claim 5, characterized in that, Rubber coatings are provided on the surfaces of the first clamping mechanism, the second clamping mechanism, and the third clamping mechanism that come into contact with the gas cylinder to be tested.

9. The automatic hydrostatic testing device for gas cylinders according to claim 5, characterized in that, Four of the cylinders are arranged in a straight line in the pit, four gas cylinder placement grooves are correspondingly arranged on the conveying trolley, four of the mounting brackets are correspondingly arranged at the top of the water injection frame, and four of the water jacket cover working components are correspondingly arranged on the water jacket cover mounting frame.

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