A lifting and unloading device and method for a gas cylinder water sleeve cap

Abstract

This invention relates to the field of intelligent equipment testing technology, and in particular discloses a lifting and unloading device and method for a gas cylinder water jacket cap. The device integrates a water jacket cap lifting unit, a water jacket cap loading and unloading unit, and a controller electrically connected to these units. This achieves a high degree of automation, eliminating the need for manual on-site operation and significantly reducing the labor intensity and safety hazards for workers. The controller controls the electric cylinder of the first drive unit to lower the water jacket cap. Upon contact with the position sensor, the adapter high-pressure connector at the bottom of the water jacket cap accurately reaches a preset position within the adapter connector's inner hole. The controller also controls the servo motor in the second drive unit to drive the adapter high-pressure connector, which is fixed to the water jacket cap, to seal and engage or disengage with the cylinder mouth adapter connector. Precise assembly and reliable sealing are achieved under the precise control of the torque sensor, eliminating human error and increasing production efficiency to meet the needs of mass production.

Description

Technical Field

[0001] This invention relates to the field of intelligent equipment testing technology, and in particular to a lifting and unloading device and method for a gas cylinder water jacket cap. Background Technology

[0002] The external hydrostatic test for gas cylinders is a mandatory safety control measure used to verify the pressure-bearing strength of gas cylinders during production and use, detect residual volume deformation, identify hidden defects, and verify sealing performance. The test process includes: weighing the gas cylinder, filling the cylinder with water, connecting the water jacket cap to the cylinder, and conducting the hydrostatic test. Currently, all of these processes are performed manually. Gas cylinders are transferred via overhead cranes and assembly lines. For example, a manual overhead crane is used to install the water jacket cap and tooling connector at the cylinder opening; then, another manual overhead crane is used to lift the cylinder into the water jacket, where the water jacket is manually sealed and water is added. After the hydrostatic test, the water jacket cap and tooling connector are manually disassembled.

[0003] The following defects exist: Low degree of automation: Each step requires human operation and intervention, which requires a high level of expertise from the operators. Moreover, each operator has different operating methods and habits, resulting in poor consistency and the possibility of improper assembly, substandard sealing, and insufficient locking force. In addition, the production efficiency is low and cannot meet the needs of mass production. Safety hazards exist: The lifting of gas cylinders by the gantry crane is all done manually. In order to prevent the gas cylinders from shaking during the lifting process, manual limiters are required, which poses a safety risk of tipping over and disengagement. Summary of the Invention

[0004] This invention discloses a lifting and unloading device and method for a gas cylinder water jacket cap, aiming to solve the technical problems existing in the prior art.

[0005] The present invention adopts the following technical solution: A lifting and unloading device for a gas cylinder water jacket cap, used in the external water pressure test of a gas cylinder, includes an integrated water jacket cap lifting unit, a water jacket cap loading and unloading unit, and a controller electrically connected to the water jacket cap lifting unit and the water jacket cap loading and unloading unit. The water jacket cover lifting unit includes a connecting base plate and a first driving unit respectively installed on the front and back of the support column assembly. Under the drive of the first driving unit, the connecting base plate carries the water jacket cover loading and unloading unit fixed at the bottom to make a vertical linear motion along the vertical guide rail. The water jacket cover loading and unloading unit includes a second drive unit, a water jacket cover driven to rotate by the second drive unit, and an adapter high-pressure connector fixed to the bottom of the water jacket cover. The adapter high-pressure connector can be screwed into an adapter connector installed at the gas cylinder mouth.

[0006] In some embodiments, the water jacket cover lifting unit further includes a transmission unit, the transmission unit including a pulley block and a chain passing through the pulley block; the pulley block includes a first fixed pulley fixed to the piston end of the electric cylinder provided in the first drive unit and a second fixed pulley fixed to the top mounting plate of the support column assembly; one end of the chain is fixedly connected to the connecting base plate, and the other end passes around the first fixed pulley and is fixed to the mounting plate, so that the displacement of the water jacket cover loading and unloading unit is twice the displacement of the electric cylinder piston rod.

[0007] In some embodiments, the electric cylinder is fixedly mounted at the bottom of the support column assembly, and the cylinder body of the electric cylinder is provided with a position sensor that controls the movement distance of the piston, the position sensor being electrically connected to the controller.

[0008] In some embodiments, two parallel guide rails are vertically mounted on the front of the support column assembly. A slider is provided on the guide rail. The slider is fixedly connected to the vertical plane of the connecting base plate. The top middle part of the connecting base plate is fixedly connected to one end of the chain, so that the connecting base plate drives the water jacket cover loading and unloading unit to move up and down smoothly.

[0009] In some embodiments, the water jacket cover loading and unloading unit includes a horizontally placed connecting plate, a slewing bearing, a water jacket cover, and an adapter high-pressure connector connected in sequence at the bottom of the connecting plate, the slewing bearing having a gear ring on its outer periphery; and a second drive unit installed at the top of the connecting plate, the second drive unit including a servo motor and a pinion driven by the servo motor, the pinion meshing with the gear ring, so that the adapter high-pressure connector can rotate forward and backward as required.

[0010] In some embodiments, the adapter high-pressure connector includes a tapered external thread and a stop installed at the end of the tapered external thread. A high-pressure seal is fitted on the tapered external thread. The tapered external thread matches the tapered internal thread provided on the adapter connector installed at the gas cylinder opening. Furthermore, the central axes of the slewing bearing, the water jacket cover, the adapter high-pressure connector, and the adapter connector all coincide.

[0011] In some embodiments, a connector is installed at the middle position of the upper surface of the connecting plate, a fixed connecting plate is provided at the top of the connector and fixedly connected to the connecting base plate, an extension rod is provided at the lower end of the fixed connecting plate, the extension rod is coaxial with the rotary bearing, and a weight allocation block is installed on one side of the extension rod.

[0012] In some embodiments, an electric cylinder support frame is also installed on the top of the connecting plate on the other side of the extension rod. The servo motor is installed at the top of the electric cylinder support frame. The drive shaft of the servo motor drives the pinion to rotate. A torque sensor is also installed near the drive shaft. A torque display table that displays torque data in real time is installed on the connecting base plate and is electrically connected to the controller.

[0013] This invention also discloses a method for lifting and unloading a gas cylinder water jacket cap, which is implemented by the aforementioned lifting and unloading device for the gas cylinder water jacket cap, and includes the following steps: S1, the controller controls the electric cylinder drive connection base plate of the first drive unit to drive the water jacket cover loading and unloading unit to descend. When the piston of the electric cylinder touches the position sensor, the electric cylinder stops driving. At this time, the adapter high-pressure connector at the bottom of the water jacket cover is aligned with the inner hole of the adapter connector installed at the gas cylinder mouth. S2, the controller controls the servo motor of the second drive unit to drive the small gear at the end of the drive shaft to rotate, the small gear drives the gear ring fixed to the water jacket cover to rotate, and drives the adapter high-pressure connector to rotate. The adapter high-pressure connector has a high-pressure seal on its external thread, and the adapter high-pressure connector and the adapter connector internal thread are screwed together to seal to a preset torque. S3, the controller controls the gas cylinder operation module to release the gas cylinder and drives the gas cylinder operation module to return to the initial origin; The controller controls the water jacket cover loading and unloading unit to move the gas cylinder further down, put the gas cylinder into the water jacket, and the water jacket automatically seals, presses and replenishes water to carry out the external water pressure test; S4. After the external water pressure test is completed, the controller controls the water jacket cover loading and unloading unit to lift the gas cylinder to the preset position, and controls the servo motor to drive the adapter high-pressure connector to reverse, so as to unlock and separate the water jacket cover from the adapter connector. S5, the controller controls the electric cylinder to drive the connecting base plate to raise the water jacket cover loading and unloading unit, and stops the action when the piston returns to its original position.

[0014] Beneficial effects:

[0015] This invention discloses a lifting and unloading device and method for a gas cylinder water jacket cap. The device integrates a water jacket cap lifting unit, a water jacket cap loading and unloading unit, and a controller electrically connected to these units. This achieves a high degree of automation, eliminating the need for manual on-site operation and significantly reducing labor intensity and safety hazards. The controller controls the electric cylinder of the first drive unit to lower the water jacket cap. When the cap touches the position sensor, the drive stops when the adapter high-pressure connector at the bottom of the water jacket cap precisely reaches the inner hole of the adapter connector. The controller also controls the servo motor in the second drive unit to seal and screw the adapter high-pressure connector fixed to the water jacket cap into or unlock the adapter connector at the cylinder mouth. Precise assembly and sealing are achieved under the precise control of the torque sensor, eliminating human error and increasing production efficiency to meet the needs of mass production. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below, which constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions explain the present invention and do not constitute an improper limitation of the present invention. Figure 1 A schematic diagram of the technical solution for the lifting and unloading device for the gas cylinder water jacket cap provided in an embodiment of the present invention; Figure 2 for Figure 1 Rear view; Figure 3 The three-dimensional water jacket cover loading and unloading unit provided in the embodiment of the present invention Figure 1 ; Figure 4 The three-dimensional water jacket cover loading and unloading unit provided in the embodiment of the present invention Figure 2 ; Figure 5 A schematic diagram of the technical solution provided in the embodiment of the present invention, showing the alignment of the adapter high-pressure connector and the gas cylinder adapter connector; Figure 6 This is a schematic diagram of the technical solution structure of the adapter connector provided in an embodiment of the present invention; Figure 7 A flowchart illustrating the lifting and unloading method for the gas cylinder water jacket cap provided in an embodiment of the present invention.

[0017] In the picture: Water jacket cover lifting unit 1; support column assembly 11; mounting plate 111; stabilizing triangular plate 12; connecting base plate 13; first drive unit 14; electric cylinder 141; position sensor 142; transmission unit 15; chain 151; first fixed pulley 152; second fixed pulley 153; guide rail assembly 16; guide rail 161; slider 162; lower screw 17; upper screw 18; water jacket cover loading and unloading unit 2; water jacket cover 21; connecting plate 22; configuration block 23; rotary Bearing 24; Gear ring 241; Connector 25; Extension rod 251; Fixed connecting plate 252; Electric cylinder support frame 26; Second drive unit 27; Servo motor 271; Torque sensor 272; Drive shaft 273; Pinion 274; Torque display 275; Adapter high-pressure connector 28; Tapered external thread 281; Stop 282; High-pressure seal 29; Adapter connector 3; Inner hole 31; Tapered internal thread 32; Controller 4; Gas cylinder operation module 5. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. In the description of the present invention, it should be noted that the term "comprising" mentioned in the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to"; "several" refers to no less than 4.

[0019] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments; based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The technical solutions disclosed in this invention, such as Figures 1-7 As shown: A lifting and unloading device for a gas cylinder water jacket cap, used in the external hydrostatic test of gas cylinders, includes an integrated water jacket cap lifting unit 1, a water jacket cap loading and unloading unit 2, and a controller 4 electrically connected to the water jacket cap lifting unit 1 and the water jacket cap loading and unloading unit 2.

[0022] The water jacket cover lifting unit 1 includes a connecting base plate 13 and a first driving unit 14 respectively installed on the front and back sides of the support column assembly 11. Under the drive of the first driving unit 14, the connecting base plate 13 carries the water jacket cover loading and unloading unit 2 fixed at the bottom to make a vertical linear motion along the vertical guide rail. The water jacket cover loading and unloading unit 2 includes a second drive unit 27, a water jacket cover 21 driven to rotate by the second drive unit 27, and an adapter high-pressure connector 28 fixedly installed at the bottom of the water jacket cover 21. The adapter high-pressure connector 28 can be screwed into the adapter connector 3 installed at the gas cylinder mouth.

[0023] A preferred embodiment of the lifting and unloading device for the gas cylinder water jacket cap of the present invention is as follows: Figures 1-6 As shown: A lifting and unloading device for a gas cylinder water jacket cap, used in the external hydrostatic test of gas cylinders, includes an integrated water jacket cap lifting unit 1, a water jacket cap loading and unloading unit 2, and a controller 4 electrically connected to the water jacket cap lifting unit 1 and the water jacket cap loading and unloading unit 2.

[0024] The water jacket lifting unit 1 includes a connecting base plate 13, a first drive unit 14, and a transmission unit 15 respectively installed on the front and back sides of the support column assembly 11. The support column assembly 11 is equipped with stabilizing triangular plates 12 on both sides. The stabilizing triangular plates 12 are fixedly connected to the overall support device for the external water pressure test of the gas cylinder, so as to stably suspend the lifting and unloading device of the gas cylinder water jacket in the water pressure test area.

[0025] Driven by the first driving unit 14, the connecting base plate 13 carries the water jacket cover loading and unloading unit 2, which is fixed at the bottom, and moves vertically along the vertical guide rail in a linear motion, such as... Figure 1 , Figure 2 As shown.

[0026] The transmission unit 15 includes a pulley assembly and a chain 151 passing through the pulley assembly; the pulley assembly includes a first fixed pulley 152 and a second fixed pulley 153, the first drive unit 14 is provided with the first fixed pulley 152 at the piston end of the electric cylinder 141, and the second fixed pulley 153 is fixedly mounted on the mounting plate 111 at the top of the support column assembly 11; one end of the chain 151 is fixedly connected to the lower screw 17 installed at the middle part of the top of the connecting base plate 13, the chain slides down past the second fixed pulley 153, passes around the first fixed pulley 152, and then goes up to be fixedly connected to the upper screw 18 on the mounting plate 111, so that the free end of the chain 151 connected to the connecting base plate 13 moves a distance that is twice the moving distance of the piston end of the electric cylinder 141, that is, the displacement of the water jacket cover loading and unloading unit 2 is twice the displacement of the piston rod of the electric cylinder 141, effectively reducing the overall height, such as Figure 1 , Figure 2 As shown.

[0027] The electric cylinder 141 is fixedly mounted at the bottom of the support column assembly 11. The cylinder body is equipped with a position sensor 142 that controls the piston's movement distance. The position sensor 142 is electrically connected to the controller 4. That is, when the electric cylinder 141 drives the piston rod to extend and touch the position sensor 142, the electric cylinder stops driving. At this time, the adapter high-pressure connector 28 at the bottom of the water jacket cover 21 is aligned with the inner hole of the adapter connector 3 installed at the gas cylinder opening. The gas cylinder is vertically clamped by the gas cylinder operating module 5. Figure 5 As shown.

[0028] The front of the support column assembly 11 is vertically mounted with a guide rail assembly 16. The guide rail assembly 16 has two parallel guide rails 161, and each guide rail 161 has a slider 162. The slider 162 is fixedly connected to the vertical plane of the connecting base plate 13, and one end of the chain 151 is fixedly connected to the lower screw 17 located in the middle of the top of the connecting base plate 13, so that the connecting base plate 13 drives the water jacket cover loading and unloading unit 2 to move up and down smoothly in the vertical direction.

[0029] The water jacket cap loading and unloading unit 2 includes a second drive unit 27, a water jacket cap 21 driven to rotate by the second drive unit 27, and an adapter high-pressure connector 28 fixedly mounted at the bottom of the water jacket cap 21. The adapter high-pressure connector 28 can be screwed into and connected with an adapter connector 3 installed at the gas cylinder opening. Figure 5 As shown.

[0030] The water jacket cover loading and unloading unit 2 includes a horizontally placed connecting plate 22, a rotary bearing 24, a water jacket cover 21, and an adapter high-pressure connector 28 connected in sequence at the bottom of the connecting plate 22. The rotary bearing 24 has a gear ring 241 on its outer periphery. A second drive unit 27 is installed at the top of the connecting plate 22. The second drive unit 27 includes a servo motor 271 and a pinion 274 driven by the servo motor 271. The pinion 274 meshes with the gear ring 241, so that the adapter high-pressure connector 28 can rotate forward and backward as required.

[0031] When the controller 4 controls the servo motor 271 of the second drive unit 27 to drive the pinion 274 at the end of the transmission shaft 273 to rotate, the pinion 274 drives the gear ring 241 fixed to the water jacket cover 21 to rotate, thereby rotating the adapter high-pressure connector 28. The adapter high-pressure connector 28 has a high-pressure seal 29 sleeved on its external thread, and the adapter high-pressure connector 28 and the adapter connector 3 are screwed together to seal to a preset torque. The controller 4 controls the gas cylinder operation module 5 to release the gas cylinder and drive the gas cylinder operation module 5 to return to the initial origin. The controller 4 controls the water jacket cover loading and unloading unit 2 to continue moving the gas cylinder downwards, placing the gas cylinder into the water jacket. The water jacket automatically seals, tightens, and replenishes water for an external water pressure test. After the external water pressure test, the controller 4 controls the water jacket cover loading and unloading unit 2 to move the gas cylinder to a preset position, and controls the servo motor 271 to drive the adapter high-pressure connector 28 to reverse, thereby unlocking and separating the water jacket cover 21 from the adapter connector 3. After separation, the controller 4 controls the electric cylinder 141 to drive the connecting base plate 13 to move the water jacket cover loading and unloading unit 2 upwards, stopping the action when the piston returns to its original position.

[0032] The adapter high-pressure connector 28 includes a tapered external thread 281 and a stop 282 installed at the end of the tapered external thread 281. A high-pressure seal 29 is sleeved on the tapered external thread 281. The tapered external thread 281 matches the tapered internal thread 32 provided on the adapter connector 3 installed at the gas cylinder opening. Furthermore, the central axes of the rotary bearing 24, the water jacket 21, the adapter high-pressure connector 28, and the adapter connector 3 all coincide. Figure 5 As shown.

[0033] A connector 25 is installed at the middle position of the upper surface of the connecting plate 22. The top of the connector 25 is provided with a fixed connecting plate 252 that is fixedly connected to the connecting base plate 13. An extension rod 251 is provided at the lower end of the fixed connecting plate 252. The extension rod 251 is coaxial with the rotary bearing 24. A weight allocation block 23 is installed on one side of the extension rod 251.

[0034] An electric cylinder support frame 26 is also installed on the top of the connecting plate 22 on the other side of the extension rod. The servo motor 271 is installed on the top of the electric cylinder support frame 26. The drive shaft 273 of the servo motor 271 drives the pinion 274 to rotate. A torque sensor 272 is also installed near the drive shaft 273. The torque sensor 272 is electrically connected to a torque display meter 275 installed on the connecting base plate 13. The torque display meter 275 displays torque data in real time and is electrically connected to the controller 4. At the same time, the controller 4 controls the threads to tighten to a preset value based on the torque data.

[0035] The adapter connector 3 includes an inner hole 31, within which a tapered internal thread 32 is provided. In this embodiment, a PZ27.8 internal thread is selected, which is consistent with the tapered external thread 281 of the adapter high-pressure connector 28. Figure 6 As shown.

[0036] A preferred embodiment of the lifting and unloading method for the gas cylinder water jacket cap of the present invention is as follows: Figures 1-7 As shown: A method for lifting and unloading a water jacket cap for a gas cylinder, implemented by a lifting and unloading device for the water jacket cap, includes the following steps: S1, the controller 4 controls the electric cylinder 141 of the first drive unit 14 to drive the connecting base plate 13 to lower the water jacket cover loading and unloading unit 2. When the piston of the electric cylinder 141 touches the position sensor 142 installed at the lower end, the electric cylinder 141 stops driving. At this time, the adapter high pressure connector 28 at the bottom of the water jacket cover 21 is aligned with the inner hole 31 of the adapter connector installed at the gas cylinder mouth. S2, the controller 4 controls the servo motor 271 of the second drive unit 27 to drive the pinion 274 at the end of the transmission shaft 273 to rotate. The pinion 274 drives the gear ring 241 fixed to the water jacket cover 21 to rotate, thereby driving the adapter high-pressure connector 28 to rotate. The tapered external thread 281 of the adapter high-pressure connector 28 is fitted with a high-pressure seal 29. The tapered external thread 281 of the adapter high-pressure connector 28 engages and seals with the tapered internal thread 32 of the adapter connector 3. At the same time, the torque sensor 272 transmits the torque data to the torque display meter 275 in real time. The torque display meter 275 transmits the torque data to the controller 4. The controller 4 controls the thread tightening torque to a preset value. S3, the controller 4 controls the gas cylinder operation module 5 to release the gas cylinder and drives the gas cylinder operation module 5 to return to the initial origin; The controller 4 controls the electric cylinder 141 to drive the water jacket cover loading and unloading unit 2 to move the gas cylinder downwards, put the gas cylinder into the water jacket, and the water jacket automatically seals, presses and replenishes water to carry out the external water pressure test. S4, after the external water pressure test is completed, the controller 4 controls the electric cylinder 141 to drive the water jacket cover loading and unloading unit 2 to lift the gas cylinder to the preset position, and controls the servo motor 271 to drive the adapter high pressure connector 28 to reverse, so as to unlock and separate the water jacket cover 21 from the adapter connector 3. S5, after unlocking, the controller 4 controls the electric cylinder 141 to drive the connecting base plate 13 to raise the water jacket cover loading and unloading unit 2, and stops the action when the piston returns to its original position.

[0037] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A lifting and unloading device for a gas cylinder water jacket cap, used in external water pressure testing of gas cylinders, characterized in that: It includes an integrated water jacket cover lifting unit, a water jacket cover loading and unloading unit, and a controller electrically connected to the water jacket cover lifting unit and the water jacket cover loading and unloading unit; The water jacket cover lifting unit includes a connecting base plate and a first driving unit respectively installed on the front and back of the support column assembly. Under the drive of the first driving unit, the connecting base plate carries the water jacket cover loading and unloading unit fixed at the bottom to make a vertical linear motion along the vertical guide rail. The water jacket cover loading and unloading unit includes a second drive unit, a water jacket cover driven to rotate by the second drive unit, and an adapter high-pressure connector fixed to the bottom of the water jacket cover. The adapter high-pressure connector can be screwed into an adapter connector installed at the gas cylinder mouth.

2. The lifting and unloading device for the gas cylinder water jacket cap according to claim 1, characterized in that: The water jacket cover lifting unit also includes a transmission unit, which includes a pulley block and a chain passing through the pulley block; the pulley block includes a first fixed pulley fixed to the piston end of the electric cylinder provided in the first drive unit and a second fixed pulley fixed to the top mounting plate of the support column assembly; one end of the chain is fixedly connected to the connecting base plate, and the other end passes around the first fixed pulley and is fixed to the mounting plate, so that the displacement of the water jacket cover loading and unloading unit is twice the displacement of the electric cylinder piston rod.

3. The lifting and unloading device for the gas cylinder water jacket cap according to claim 2, characterized in that: The electric cylinder is fixedly mounted at the bottom of the support column assembly. The cylinder body of the electric cylinder is equipped with a position sensor that controls the movement distance of the piston. The position sensor is electrically connected to the controller.

4. The lifting and unloading device for the gas cylinder water jacket cap according to claim 3, characterized in that: Two parallel guide rails are vertically mounted on the front of the support column assembly. A slider is provided on the guide rail. The slider is fixedly connected to the vertical plane of the connecting base plate. The top middle part of the connecting base plate is fixedly connected to one end of the chain, so that the connecting base plate drives the water jacket cover loading and unloading unit to move up and down smoothly.

5. The lifting and unloading device for the gas cylinder water jacket cap according to claim 1, characterized in that: The water jacket cover loading and unloading unit includes a horizontally placed connecting plate, a slewing bearing, a water jacket cover, and an adapter high-pressure connector connected in sequence at the bottom of the connecting plate, and a gear ring on the outer circumference of the slewing bearing; a second drive unit is installed at the top of the connecting plate, the second drive unit includes a servo motor and a pinion driven by the servo motor, the pinion meshing with the gear ring, so that the adapter high-pressure connector can rotate forward and backward as required.

6. The lifting and unloading device for the gas cylinder water jacket cap according to claim 5, characterized in that: The adapter high-pressure connector includes a tapered external thread and a stop installed at the end of the tapered external thread. A high-pressure seal is fitted on the tapered external thread. The tapered external thread matches the tapered internal thread of the adapter connector installed at the gas cylinder opening. The central axes of the rotary bearing, the water jacket cover, the adapter high-pressure connector, and the adapter connector all coincide.

7. The lifting and unloading device for the gas cylinder water jacket cap according to claim 5, characterized in that: A connector is installed at the middle position of the upper surface of the connecting plate. The top of the connector is provided with a fixed connecting plate that is fixedly connected to the connecting base plate. An extension rod is provided at the lower end of the fixed connecting plate. The extension rod is coaxial with the rotary bearing. A weight allocation block is installed on one side of the extension rod.

8. The lifting and unloading device for the gas cylinder water jacket cap according to claim 7, characterized in that: An electric cylinder support frame is also installed on the top of the connecting plate on the other side of the extension rod. The servo motor is installed at the top of the electric cylinder support frame. The drive shaft of the servo motor drives the pinion to rotate. A torque sensor is also installed near the drive shaft. A torque display table that displays torque data in real time is installed on the connecting base plate and is electrically connected to the controller.

9. A method for lifting, installing, and removing a water sleeve cap for a gas cylinder, characterized in that: The lifting and unloading device for the gas cylinder water jacket cap as described in any one of claims 1 to 8 includes the following steps: S1, the controller controls the electric cylinder drive connection base plate of the first drive unit to drive the water jacket cover loading and unloading unit to descend. When the piston of the electric cylinder touches the position sensor, the electric cylinder stops driving. At this time, the adapter high-pressure connector at the bottom of the water jacket cover is aligned with the inner hole of the adapter connector installed at the gas cylinder mouth. S2, the controller controls the servo motor to drive the small gear at the end of the transmission shaft to rotate, the small gear drives the gear ring fixed to the water jacket cover to rotate, which in turn drives the adapter high-pressure connector to rotate, the adapter high-pressure connector has a high-pressure seal on its external thread, and the adapter high-pressure connector and the adapter connector internal thread are screwed together to seal to a preset torque; S3, the controller controls the gas cylinder operation module to release the gas cylinder and drives the gas cylinder operation module to return to the initial origin; The controller controls the water jacket cover loading and unloading unit to move the gas cylinder further down, put the gas cylinder into the water jacket, and the water jacket automatically seals, presses and replenishes water to carry out the external water pressure test; S4. After the external water pressure test is completed, the controller controls the electric cylinder to drive the water jacket cover loading and unloading unit to lift the gas cylinder to the preset position, and controls the servo motor to drive the adapter high-pressure connector to reverse, so as to unlock and separate the water jacket cover from the adapter connector. S5, after being released, the controller controls the electric cylinder to drive the connecting base plate to raise the water jacket cover loading and unloading unit, and stops the action when the piston returns to its original position.

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