Fire-fighting bottle valve automatic loading and unloading machine and loading and unloading method thereof

Abstract

The application discloses a fire-fighting bottle valve automatic mounting and dismounting machine, which comprises a rack serving as an overall support structure, a gas cylinder clamping device arranged in the middle of the rack and comprising symmetrically arranged clamping arms and clamping driving elements, arc-shaped clamping blocks arranged on the inner sides of the clamping arms, a lifting platform movably arranged on the rack in the vertical direction, a bottle valve mounting and dismounting mechanism arranged on the lifting platform and comprising a rotary driving assembly, a torque sensor and a bottle valve chuck, the rotary driving assembly being connected with the bottle valve chuck through the torque sensor, the bottle valve chuck having a U-shaped chucking opening matched with the outer shape of the bottle valve, and a control system electrically connected with the gas cylinder clamping device, the lifting platform and the bottle valve mounting and dismounting mechanism. The closed-loop control system integrated with the torque sensor can accurately control the tightening torque of the bottle valve, the torque control precision is high, the problems of poor sealing or thread damage caused by inconsistent manual operation torque are effectively solved, and the bottle valve mounting and dismounting operation of the fire-fighting gas cylinder of various specifications can be quickly adapted.

Description

Technical Field

[0001] This invention relates to the field of fire-fighting equipment technology, and in particular to an automatic loading and unloading machine for fire-fighting cylinder valves and its loading and unloading method. Background Technology

[0002] Fire extinguishing gas cylinders are essential equipment in the public safety field, widely used in building fire protection, industrial protection, transportation, and other scenarios. The cylinder valve, as the core control component of the cylinder, is installed at the cylinder opening and undertakes critical functions such as filling, sealing, and emergency release of the extinguishing agent. The quality of the connection between the cylinder valve and the cylinder body directly affects the cylinder's sealing performance, safety, and service life.

[0003] Currently, fire-fighting gas cylinder valves are generally connected to the cylinder body via threaded connections. Precise control of the connection torque is crucial: insufficient torque leads to poor sealing and gas leakage; excessive torque damages the threads, causing deformation or even breakage of the valve or cylinder body. Therefore, the installation and removal of cylinder valves requires strict process control and precise torque management. Traditional fire-fighting cylinder valve installation and removal mainly rely on manual operation, with operators using ordinary wrenches or pneumatic wrenches to tighten or loosen the valves. This method has the following significant drawbacks: (1) The labor intensity is high and the efficiency is low. The loading and unloading of the valve of a single gas cylinder requires the operator to apply continuous force. For batch production or periodic inspection scenarios, the labor intensity of the operator is extremely high, and the average daily processing capacity is limited, which makes it difficult to meet the needs of large-scale production or testing.

[0004] (2) Poor torque control accuracy: Manual operation makes it difficult to accurately control the tightening torque, relying mainly on experience to judge, resulting in poor consistency of valve connection quality in the same batch. Over-tightening or under-tightening occurs frequently, causing quality problems such as poor sealing and thread damage.

[0005] (3) Significant safety hazards: For high-pressure gas cylinders, there are safety risks such as accidental valve detachment and high-pressure gas ejection during manual operation. In addition, long-term repetitive force application can easily lead to occupational diseases such as muscle strain in operators.

[0006] Some manufacturers use simple mechanized equipment for loading and unloading bottle valves, such as ordinary electric wrenches with fixed supports. While this type of equipment reduces labor intensity to some extent, it still has significant shortcomings: (1) Lack of automatic positioning function: Most existing equipment requires manual alignment of the center position of the cylinder valve, which is not adaptable to gas cylinders of different specifications and heights, and the adjustment time is long.

[0007] (2) The torque control method is rudimentary. Most simple equipment uses time control or current threshold control, which cannot monitor the actual torque value in real time, has limited control accuracy, and makes it difficult to record and trace torque data.

[0008] (3) The degree of automation is low. The clamping, positioning, loading and unloading of the bottle still require manual intervention. A complete automated operation process has not been formed, and the overall efficiency improvement is limited.

[0009] Therefore, there is an urgent need to develop an automatic loading and unloading machine and method for fire-fighting cylinder valves that is highly automated, adaptable, has precise torque control, and is cost-effective. Summary of the Invention

[0010] To address the above-mentioned problems, this invention provides an automatic loading and unloading machine for fire extinguisher bottle valves, comprising: The frame serves as the overall support structure; A gas cylinder clamping device is located in the middle of the frame and is used to automatically center and clamp fire gas cylinders of different specifications. The gas cylinder clamping device includes symmetrically arranged clamping arms and a clamping drive component for driving the clamping arms to open and close. The inner side of the clamping arm is provided with an arc-shaped clamping block that matches the outer contour of the gas cylinder. The lifting platform is vertically movable on the frame and is used to adjust the working height to accommodate gas cylinders of different lengths. A bottle valve loading and unloading mechanism is installed on the lifting platform and includes a rotary drive assembly, a torque sensor and a bottle valve clamp. The rotary drive assembly is connected to the bottle valve clamp through the torque sensor. The bottle valve clamp has a U-shaped bayonet that matches the shape of the bottle valve and is used to hold the bottle valve and rotate it for loading and unloading. The control system is electrically connected to the gas cylinder clamping device, the lifting platform, and the cylinder valve loading and unloading mechanism. It is used to receive the detection signal from the torque sensor and control the start and stop of the rotary drive assembly according to the preset torque threshold, so as to achieve precise control of the cylinder valve tightening torque.

[0011] As a further explanation of the present invention, the lifting platform is connected to the frame through a ball screw transmission mechanism and is driven by a lifting motor to move in the vertical direction. The lifting platform is equipped with a height sensor for detecting and feeding back the height of the center position of the bottle valve.

[0012] Furthermore, the rotary drive assembly includes a servo motor and a reducer, the servo motor being electrically connected to the control system, and the control system adjusting the speed and direction of the servo motor based on the real-time feedback signal from the torque sensor.

[0013] Furthermore, the bottle valve clamp also includes a quick-change structure for quickly replacing U-shaped clamps of different specifications to adapt to different models of bottle valves.

[0014] Furthermore, it also includes a gas cylinder positioning device, which is mounted on the frame and located below the gas cylinder clamping device. The gas cylinder positioning device includes a V-shaped positioning block and a positioning cylinder that drives the V-shaped positioning block to move horizontally, for preliminary centering of the gas cylinder before clamping.

[0015] Furthermore, the control system includes a PLC controller, a human-machine interface, and a data storage module. The PLC controller is used to receive signals from various sensors and output control commands. The human-machine interface is used for parameter setting and status display. The data storage module is used to record the valve loading and unloading torque data of each gas cylinder to achieve quality traceability.

[0016] Furthermore, the clamping drive component of the gas cylinder clamping device is a pneumatic hydraulic cylinder or a servo electric cylinder, and the surface of the arc-shaped clamping block is covered with an anti-slip and wear-resistant rubber layer.

[0017] Furthermore, the frame is also equipped with an automatic feeding conveyor line and an automatic unloading conveyor line, which are respectively connected to the gas cylinder clamping device to realize the automatic feeding and unloading of gas cylinders.

[0018] On the other hand, the present invention also provides a loading and unloading method for an automatic loading and unloading machine for fire cylinder valves, which is implemented using the aforementioned automatic loading and unloading machine for fire cylinder valves, and includes the following steps: S1: Parameter preset, input the specifications, valve model and target torque threshold of the gas cylinder to be operated through the human-machine interface of the control system; S2: Automatic feeding, placing the gas cylinders to be loaded and unloaded into the automatic feeding conveyor line and transporting them to the station of the gas cylinder clamping device; S3: Positioning and clamping. The gas cylinder positioning device initially centers the gas cylinder, and then the clamping arm of the gas cylinder clamping device closes, and the arc-shaped clamping block hugs the gas cylinder body. S4: Height adjustment. The lifting platform automatically rises and falls according to preset parameters, aligning the center of the U-shaped bayonet of the cylinder valve head with the center of the cylinder valve. S5: Bottle valve loading and unloading, the bottle valve clamp holds the bottle valve, the rotary drive assembly drives the bottle valve to rotate, the torque sensor monitors the torque value in real time, and when the preset threshold is reached, the control system controls the rotary drive assembly to stop automatically. S6: Data recording. The control system associates and stores the torque data and time information of this operation into the data storage module. S7: Unclamping and unloading: The cylinder valve clamp releases the cylinder valve, the cylinder clamping device releases the cylinder, and the automatic unloading conveyor line delivers the completed cylinder.

[0019] The beneficial effects of this invention are: This invention utilizes a closed-loop control system with an integrated torque sensor to precisely control the tightening torque of the cylinder valve. The high torque control accuracy effectively solves the problems of poor sealing or thread damage caused by inconsistent torque during manual operation. Through the coordination of a lifting platform, cylinder clamping device, cylinder valve loading / unloading mechanism, and cylinder positioning device, it can quickly adapt to various specifications of cylinders and different models of cylinder valves. It features short changeover time, high positioning accuracy, and suitability for multi-variety, small-batch production. Maintenance is convenient, making it particularly suitable for promotion and use by small and medium-sized fire equipment manufacturers, resulting in significant economic and social benefits. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the automatic loading and unloading machine for fire-fighting bottle valves according to an embodiment of the present invention; Figure 2 This is a structural diagram of the gas cylinder clamping device according to an embodiment of the present invention; Figure 3 This is a structural diagram of the bottle valve loading and unloading mechanism according to an embodiment of the present invention; Figure 4 This is a structural diagram of the gas cylinder positioning device according to an embodiment of the present invention.

[0021] Reference numerals in the attached drawings: 1. Frame; 2. Cylinder clamping device; 21. Clamping arm; 22. Clamping drive component; 23. Arc-shaped clamping block; 3. Lifting platform; 4. Cylinder valve loading and unloading mechanism; 4. Rotary drive assembly; 41. Servo motor; 411. Reducer; 412. Torque sensor; 42. Cylinder valve clamp; 43. U-shaped bayonet; 431. Locking bolt; 432. Control system; 5. Cylinder positioning device; 6. V-shaped positioning block; 61. Positioning cylinder; 62. Cylinder; 7. Detailed Implementation

[0022] Example:

[0023] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "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.

[0025] As attached Figure 1-4As shown in this embodiment, an automatic loading and unloading machine for fire-fighting gas cylinder valves includes: a frame 1, serving as an overall support structure; a gas cylinder clamping device 2, located in the middle of the frame 1, for automatically centering and clamping fire-fighting gas cylinders 7 of different specifications, the gas cylinder clamping device 2 including symmetrically arranged clamping arms 21 and clamping drive members 22 for driving the clamping arms 21 to open and close, the inner side of the clamping arms 21 is provided with an arc-shaped clamping block 23 adapted to the outer contour of the fire-fighting gas cylinder 7; a lifting platform 3, movably mounted on the frame 1 in the vertical direction, for adjusting the working height to accommodate fire-fighting gas cylinders 7 of different lengths; and a cylinder valve loading and unloading mechanism 4. The automatic cylinder valve loading and unloading mechanism 4, mounted on the lifting platform 3, includes a rotary drive assembly 41, a torque sensor 42, and a valve clamp 43. The rotary drive assembly 41 is connected to the valve clamp 43 via the torque sensor 42. The valve clamp 43 has a U-shaped bayonet 431 that matches the shape of the cylinder valve for holding the valve and rotating it for loading and unloading. The control system 5 is electrically connected to the cylinder clamping device 2, the lifting platform 3, and the valve loading and unloading mechanism 4. It receives the detection signal from the torque sensor 42 and controls the start and stop of the rotary drive assembly 41 according to a preset torque threshold, thereby achieving precise control of the cylinder valve tightening torque. This embodiment of the automatic cylinder valve loading and unloading machine, through its integrated torque sensor and closed-loop control system, can precisely control the cylinder valve tightening torque. The high torque control accuracy effectively solves the problem of poor sealing or thread damage caused by inconsistent torque during manual operation. Simultaneously, it achieves automatic recording and traceability of torque data, meeting quality supervision requirements. By controlling the parameter settings and coordinating with the cylinder valve loading and unloading mechanism 4, it can quickly adapt to various specifications of fire cylinders 7 and different models of cylinder valves, with short changeover time, adapting to multi-variety small-batch production mode; it is easy to maintain, and is especially suitable for promotion and use by small and medium-sized fire equipment manufacturers, with good economic and social benefits.

[0026] Specifically, in this embodiment, the lifting platform 3 is connected to the frame 1 via a ball screw transmission mechanism 31 and is driven by a lifting motor 32 to move vertically. The lifting platform 3 is equipped with a height sensor 33 to detect and provide feedback on the height of the bottle valve center position. The ball screw transmission mechanism 31 consists of two parallel ball screws and a matching nut seat. The nut seat is fixedly connected to the lifting platform 3. The lifting motor 32 is connected to one end of the ball screws via a coupling. When the lifting motor 32 receives a command from the control system 5, it drives the ball screws to rotate, thereby causing the nut seat and the lifting platform 3 to move smoothly up and down along the guide rails on the frame 1. The height sensor 33 is a laser displacement sensor, installed on the side of the lifting platform 3 near the cylinder valve clamp 43. Its detection beam points vertically downwards towards the cylinder opening area of ​​the fire cylinder 7. During the adjustment of the lifting platform 3, the height sensor 33 scans and acquires the height data of the top of the cylinder valve in real time, and feeds the data back to the control system 5. The control system 5 compares the preset cylinder valve center height parameter with the actual detection value and adjusts the rotation of the lifting motor 32 to achieve precise alignment between the center of the cylinder valve clamp 43 and the center of the cylinder valve.

[0027] Specifically, in this embodiment, the rotary drive assembly 41 includes a servo motor 411 and a reducer 412. The servo motor 411 is electrically connected to the control system 5. The control system 5 adjusts the speed and direction of the servo motor 411 according to the real-time feedback signal from the torque sensor 42. The servo motor 411 is an AC servo motor with a brake function. Its output shaft is connected to the input end of the reducer 412 through a flexible coupling. The reducer 412 is a planetary gear reducer, which has high transmission efficiency and high torque output characteristics. Its output end is connected to the bottle valve clamp 43 through the torque sensor 42. When the bottle valve is tightened, the control system 5 sends a forward rotation command to the servo motor 411. The servo motor 411 drives the bottle valve clamp 43 to rotate through the reducer 412. The torque sensor 42 collects the current torque value in real time and converts it into an electrical signal, which is then transmitted to the PLC controller of the control system 5. The PLC controller compares the real-time torque value with a preset target torque threshold. When the torque reaches 80% of the threshold, it controls the servo motor 411 to reduce its speed and enter the fine tightening stage. When the real-time torque value reaches the target threshold, it immediately controls the servo motor 411 to stop rotating and triggers the brake to prevent torque overshoot due to inertia. During the bottle valve disassembly operation, the control system 5 controls the servo motor 411 to reverse, and the torque sensor 42 monitors the reverse torque. When the bottle valve threads become loose, the speed can be appropriately increased to improve disassembly efficiency. When the torque suddenly drops to the no-load level, it is determined that the bottle valve has been completely disassembled, and the servo motor 411 is stopped.

[0028] Specifically, in this embodiment, the bottle valve clamp 43 also includes a quick-change structure for quickly replacing U-shaped clamps 431 of different specifications to adapt to different bottle valve models. The quick-change structure includes a positioning pin hole and a locking bolt 432 on the main body of the bottle valve clamp 43. The U-shaped clamp 431 is quickly positioned by a positioning pin that engages with the positioning pin hole. After positioning, the locking bolt secures the U-shaped clamp 431 to the main body of the bottle valve clamp 43. Different bottle valve models correspond to U-shaped clamps 431 of different sizes and shapes. Operators can remove the current U-shaped clamp 431 and replace it with a matching new U-shaped clamp 431 by loosening the locking bolt and pulling out the positioning pin, according to the model of the bottle valve to be operated. The entire replacement process does not require special tools, making the operation convenient and quick, greatly improving the equipment's adaptability to different bottle valve models.

[0029] Specifically, this embodiment also includes a gas cylinder positioning device 6, which is mounted on the frame 1 and located below the gas cylinder clamping device 2. The gas cylinder positioning device 6 includes a V-shaped positioning block 61 and a positioning cylinder 62 that drives the V-shaped positioning block 61 to move horizontally, for preliminary centering of the fire-fighting gas cylinder 7 before clamping. The positioning cylinder 62 is a double-acting cylinder, and its piston rod end is connected to the V-shaped positioning block 61. When the fire-fighting gas cylinder 7 is transported to the station of the gas cylinder clamping device 2 by the automatic feeding conveyor line, the control system 5 first controls the positioning cylinder 62 to extend, and the V-shaped positioning blocks 61 on both sides move synchronously toward the center of the fire-fighting gas cylinder 7 until the V-shaped groove contacts the body of the fire-fighting gas cylinder 7. The self-centering characteristic of the V-shaped block is used to perform preliminary positioning of the fire-fighting gas cylinder 7, ensuring that the axis of the fire-fighting gas cylinder 7 is basically coincident with the central axis of the equipment. After positioning is completed, the positioning cylinder 62 remains extended to provide auxiliary positioning for the subsequent clamping action of the gas cylinder clamping device 2.

[0030] Specifically, in this embodiment, the clamping drive component 22 of the gas cylinder clamping device 2 is a pneumatic hydraulic cylinder or a servo electric cylinder, and the surface of the arc-shaped clamping block 23 is covered with a non-slip and wear-resistant rubber layer 231. When a pneumatic hydraulic cylinder is used as the clamping drive component, it achieves high clamping force output through the principle of gas-liquid pressurization. The clamping pressure can be adjusted through the human-machine interface of the control system according to the material and wall thickness of different specifications of fire-fighting gas cylinders 7, ensuring that the fire-fighting gas cylinder 7 can be reliably clamped to prevent rotation, and that the fire-fighting gas cylinder 7 will not be deformed due to excessive clamping force. The non-slip and wear-resistant rubber layer 231 covering the surface of the arc-shaped clamping block 23 increases the friction with the surface of the fire-fighting gas cylinder 7, preventing the fire-fighting gas cylinder 7 from slipping during clamping, and also provides a buffer protection for the surface of the fire-fighting gas cylinder 7, avoiding scratches or indentations caused by direct metal-to-metal contact. When a servo electric cylinder is selected as the clamping drive, the clamping stroke and clamping force can be precisely controlled by the control system to achieve closed-loop force control. It is particularly suitable for clamping operations of thin-walled fire cylinders 7 or fire cylinders 7 made of special materials that require high clamping force.

[0031] On the other hand, the present invention also provides a loading and unloading method for an automatic loading and unloading machine for fire cylinder valves, which is implemented using the aforementioned automatic loading and unloading machine for fire cylinder valves, and includes the following steps: S1: Parameter preset, input the specifications, valve model and target torque threshold of the fire cylinder 7 to be operated through the human-machine interface of the control system 5; S2: Automatic feeding, placing the fire gas cylinder 7 with the valve to be loaded and unloaded on the automatic feeding conveyor line and conveying it to the station of the gas cylinder clamping device 2; S3: Positioning and clamping, the gas cylinder positioning device 6 initially centers the fire gas cylinder 7, and then the clamping arm 21 of the gas cylinder clamping device 2 closes, and the arc-shaped clamping block 23 hugs the body of the fire gas cylinder 7. S4: Height adjustment, the lifting platform 3 automatically rises and falls according to preset parameters, so that the center of the U-shaped bayonet 431 of the cylinder valve clamp 43 is aligned with the center of the fire cylinder valve 7; S5: Bottle valve loading and unloading, bottle valve clamp 43 holds the bottle valve, rotary drive assembly 41 drives the bottle valve to rotate, torque sensor 42 monitors the torque value in real time, and when the preset threshold is reached, the control system 5 controls the rotary drive assembly 41 to automatically stop. S6: Data recording. The control system 5 associates and stores the torque data and time information of this operation into the data storage module. S7: Release clamp and unload. Cylinder valve clamp 43 releases the cylinder valve, cylinder clamping device 2 releases the fire cylinder 7, and the automatic unloading conveyor line sends out the completed fire cylinder 7.

[0032] The above description only illustrates preferred embodiments of the present invention and should not be construed as limiting the scope of the claims. The present invention is not limited to the above embodiments, and variations in its specific structure are permitted. In short, all variations made within the scope of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. An automatic loading and unloading machine for fire extinguisher bottle valves, characterized in that, include: The frame (1) serves as the overall support structure; A gas cylinder clamping device (2) is set in the middle of the frame (1) and is used to automatically center and clamp fire gas cylinders of different specifications. The gas cylinder clamping device (2) includes symmetrically arranged clamping arms (21) and a clamping drive (22) for driving the clamping arms (21) to open and close. The inner side of the clamping arms (21) is provided with an arc-shaped clamping block (23) that matches the outer contour of the gas cylinder. The lifting platform (3) is movably mounted on the frame (1) in the vertical direction and is used to adjust the working height to accommodate gas cylinders of different lengths; The bottle valve loading and unloading mechanism (4) is set on the lifting platform (3) and includes a rotary drive assembly (41), a torque sensor (42) and a bottle valve clamp (43). The rotary drive assembly (41) is connected to the bottle valve clamp (43) through the torque sensor (42). The bottle valve clamp (43) has a U-shaped bayonet (431) that matches the shape of the bottle valve and is used to clamp the bottle valve and perform rotary loading and unloading. The control system (5) is electrically connected to the gas cylinder clamping device (2), the lifting platform (3), and the cylinder valve loading and unloading mechanism (4). It is used to receive the detection signal from the torque sensor (42) and control the start and stop of the rotary drive assembly (41) according to the preset torque threshold, so as to achieve precise control of the cylinder valve tightening torque.

2. The automatic loading and unloading machine for fire-fighting cylinder valves according to claim 1, characterized in that: The lifting platform (3) is connected to the frame (1) through a ball screw transmission mechanism (31) and is driven by a lifting motor (32) to move in the vertical direction. The lifting platform (3) is equipped with a height sensor (33) to detect and provide feedback on the height of the center position of the bottle valve.

3. The automatic loading and unloading machine for fire-fighting cylinder valves according to claim 1, characterized in that: The rotary drive assembly (41) includes a servo motor (411) and a reducer (412). The servo motor (411) is electrically connected to the control system (5). The control system (5) adjusts the speed and direction of the servo motor (411) according to the real-time feedback signal of the torque sensor (42).

4. The automatic loading and unloading machine for fire-fighting cylinder valves according to claim 1, characterized in that: The bottle valve clamp (43) also includes a quick-change structure for quickly replacing different specifications of U-shaped clamps (431) to adapt to different models of bottle valves.

5. The automatic loading and unloading machine for fire-fighting cylinder valves according to claim 3, characterized in that: It also includes a gas cylinder positioning device (6), which is set on the frame (1) and located above the gas cylinder clamping device (2). The gas cylinder positioning device (6) includes a V-shaped positioning block (61) and a positioning cylinder (62) that drives the V-shaped positioning block (61) to move horizontally, for preliminary centering of the gas cylinder before clamping.

6. The automatic loading and unloading machine for fire-fighting cylinder valves according to claim 1, characterized in that: The control system (5) includes a PLC controller, a human-machine interface and a data storage module. The PLC controller is used to receive signals from each sensor and output control commands. The human-machine interface is used for parameter setting and status display. The data storage module is used to record the valve loading and unloading torque data of each gas cylinder to achieve quality traceability.

7. The automatic loading and unloading machine for fire-fighting cylinder valves according to claim 1, characterized in that: The clamping drive component (22) of the gas cylinder clamping device (2) is a pneumatic hydraulic cylinder or a servo electric cylinder, and the surface of the arc-shaped clamping block (23) is covered with an anti-slip and wear-resistant rubber layer (231).

8. The automatic loading and unloading machine for fire-fighting cylinder valves according to claim 1, characterized in that: The frame (1) is also equipped with an automatic feeding conveyor line and an automatic unloading conveyor line, which are respectively connected to the gas cylinder clamping device (2) to realize the automatic feeding and unloading of gas cylinders.

9. A loading and unloading method for an automatic fire extinguisher bottle valve loading and unloading machine, employing the automatic fire extinguisher bottle valve loading and unloading machine as described in any one of claims 1-8, characterized in that, Includes the following steps: S1: Parameter preset, input the specifications, valve model and target torque threshold of the gas cylinder to be operated through the human-machine interface of the control system (5); S2: Automatic feeding, placing the gas cylinder with the valve to be loaded or unloaded on the automatic feeding conveyor line and conveying it to the station of the gas cylinder clamping device (2); S3: Positioning and clamping, the gas cylinder positioning device (6) initially centers the gas cylinder, and then the clamping arm (21) of the gas cylinder clamping device (2) closes, and the arc-shaped clamping block (23) hugs the gas cylinder body. S4: Height adjustment, the lifting platform (3) automatically lifts and lowers according to the preset parameters, so that the center of the U-shaped bayonet (431) of the valve head (43) is aligned with the center of the gas cylinder valve; S5: Bottle valve loading and unloading, bottle valve clamp (43) clamps the bottle valve, rotary drive assembly (41) drives the bottle valve to rotate, torque sensor (42) monitors the torque value in real time, and when the preset threshold is reached, the control system (5) controls the rotary drive assembly (41) to automatically stop. S6: Data recording, the control system (5) will associate and store the torque data and time information of this operation into the data storage module; S7: Loosen the clamp and unload the gas cylinder. The cylinder valve clamp (43) releases the cylinder valve, and the gas cylinder clamping device (2) releases the gas cylinder. The automatic unloading conveyor line sends out the gas cylinder that has completed the operation.

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