Intelligent gas cylinder filling device

Abstract

The invention discloses an intelligent gas cylinder filling device, and belongs to the technical field of gas filling equipment. Comprising a pedestal, a gas cylinder receiving unit, a clamping rotating unit, a lifting module, a cylinder opening valve mechanism, a gas cylinder suspension docking mechanism and a visual unit, the pedestal is of an L-shaped structure, and an electric control cabinet for complete machine control is fixed to the back face of the pedestal; the gas cylinder receiving unit comprises a metering and filling scale fixed at the bottom of the pedestal, a rotating table is fixed on the top surface of the metering and filling scale, and a gas cylinder jacket is fixed at the top of the rotating table; the clamping and rotating unit is arranged above the gas cylinder receiving unit and is mounted on the front side of the pedestal; the lifting module is fixed on the upper part of the pedestal; the bottle opening valve mechanism is fixed to the lifting end of the lifting module. The gas cylinder suspension butt joint mechanism comprises a supporting ring plate fixed to the lifting end of the lifting module, and the intelligent gas cylinder filling device can diffuse and collect residual gas of the gas cylinders and can achieve automatic filling of the gas cylinders.

Description

Technical Field

[0001] This invention specifically relates to an intelligent gas cylinder filling device, belonging to the technical field of gas filling equipment. Background Technology

[0002] Bottled carbon dioxide filling uses a liquid weighing method. Current processes require manual intervention in core steps such as cylinder handling, filling connector connection, and valve operation, making them unavoidable labor-intensive aspects of the current process. Existing cylinder filling equipment, such as the mixed gas collection and filling device disclosed in Chinese Patent Publication No. CN119022226B, includes a cylinder and two bases. A placement seat is slidably positioned between the two bases, and the placement seat has a placement groove. The placement seat is horizontal with the cylinder, facilitating gas filling. During the sliding process of the placement seat, a clamping component is passively charged, and after the cylinder slides to a fixed position, the clamping component is released, allowing the gas to be filled. The cylinder clamping mechanism improves portability when securing the cylinder. However, existing cylinder filling equipment has the following drawbacks: After the cylinders return to the factory, significant differences in internal residual pressure exist. Current market processes require manual purging of each cylinder before filling, leading to waste of process gas. Furthermore, for filling lines without return pipelines, residual pressure in the cylinders causes frequent tripping of safety valves, resulting in substantial waste. Cylinder positioning, pipeline connections, and valve operation all require manual intervention, necessitating significant labor input. Additionally, existing cylinder filling and weighing methods are susceptible to pressure fluctuations at the filling head, compromising filling accuracy. Summary of the Invention

[0003] To address the aforementioned problems, this invention proposes an intelligent gas cylinder filling device that can release and collect residual gas from gas cylinders and automate the filling of gas cylinders.

[0004] The intelligent gas cylinder filling device of the present invention includes: The platform has an L-shaped structure, and an electrical control cabinet for the whole machine is fixed on the back of the platform. The gas cylinder receiving unit includes a metering and filling scale fixed to the bottom of a base. A rotating platform is fixed to the top surface of the metering and filling scale, and a gas cylinder clamp is fixed to the top of the rotating platform. After the gas cylinder is placed into the gas cylinder clamp, the gas cylinder is held tightly. The rotating platform at the bottom of the gas cylinder clamp can drive the entire assembly to rotate. The metering and filling scale is a 150kg intelligent weighing scale that supports net weight, gross weight, and composite filling modes. It automatically identifies the specifications of empty cylinders and calculates the weight to be filled. A clamping and rotating unit is disposed above the gas cylinder receiving unit and installed on the front side of the base; A lifting module, the lifting module comprising a component fixed to the upper part of the base; A bottle opening valve mechanism, which is fixed to the lifting end of the lifting module; A gas cylinder suspension docking mechanism includes a support ring plate fixed to the lifting end of a lifting module. Second slide rails are fixed on both sides of the support ring plate, and two sets of second sliders are slidably mounted on the second slide rails. A first seat plate and a second seat plate are respectively fixed to the two opposing second sliders. Guide posts are fixed on both sides between the first and second seat plates, and floating plates are slidably mounted on the guide posts. A three-way flow channel is integrally formed on the second seat plate. Low-temperature charging heads and air inlet connectors are provided at both ends of the three-way flow channel, and an exhaust connector is provided at the middle end of the three-way flow channel. A pressure transmitter is installed between the air inlet connector and the three-way flow channel. The inlet connector is connected to the gas supply source through a first solenoid valve, and the outlet connector is connected to the venting and collection pipeline through a second solenoid valve. A centering pressure head is fixed to the floating plate opposite the cryogenic filling head. The cryogenic filling head and the centering pressure head cooperate to form an adaptive sealing clamp for the gas cylinder. For example, if the cryogenic filling head is configured as a trumpet-shaped filling nozzle and an external sealing ring is provided, it can stably withstand a filling pressure of 10MPa, preventing high-pressure gas leakage. A filling cylinder is fixed at the center of the first base plate, and the piston rod of the filling cylinder is fixed to the floating plate. Tension springs are fixed on both sides of the second base plate away from the cryogenic filling head, and the other end of the tension springs is fixed to the support ring plate. A vision unit is disposed on both sides of the support ring plate.

[0005] After receiving the gas cylinder, the gas cylinder receiving unit performs high-precision visual positioning of the cylinder opening through a vision unit, and collects the spatial coordinates and attitude angle data of the valve core in real time. The PLC in the electrical control cabinet analyzes the visual data, generates motion commands, and drives the cylinder opening valve mechanism and the gas cylinder suspension docking mechanism to move along a preset trajectory to above the valve core. The clamping rotation unit operates, causing the gas cylinder to rotate slowly on the turntable. During rotation, the vision unit identifies the valve core to ensure that the valve core is adjusted to a precise orientation, so that the low-temperature filling head of the gas cylinder suspension docking mechanism and the valve opening of the gas cylinder valve core achieve dynamic coaxial calibration (coaxial accuracy ≤ ±0.1mm). After the clamping and rotating unit completes its clamping and braking, the bottle opening valve mechanism actuates, moving downwards by a fixed distance. Once downwards, the actuating end of the bottle opening valve mechanism aligns with the cylinder's paddle wheel. Next, the cylinder suspension and docking mechanism actuates, specifically as follows: the filling cylinder actuates, its piston rod extends, driving the floating plate towards the cylinder valve core, causing the centering pressure head to press against the outer wall of the valve core. As the piston rod continues to extend, due to the centering pressure head being limited by the cylinder valve core, the first seat plate, the second seat plate, the guide post, the outer cylinder of the filling cylinder, and the second slider form a sliding assembly. As the piston rod continues to extend, the sliding assembly slides in the opposite direction of the piston rod's extension, causing the second... The cryogenic filling head of the base plate is precisely aligned with the filling port of the gas cylinder valve core, and continues to slide linearly with the sliding assembly, ensuring a tight connection between the cryogenic filling head and the filling port. At this point, the tension spring is continuously stretched, and then the cylinder opening valve mechanism drives the plum blossom handwheel to rotate, opening the valve core. Next, the residual pressure is detected by the pressure transmitter. If the residual pressure exceeds the limit, an alarm is triggered. If the residual pressure is below the threshold, the second solenoid valve opens, and the residual gas is sent to the venting and collection pipeline through the exhaust connector and the second solenoid valve. The venting and collection pipeline empties the gas cylinder and collects the residual gas externally, closing the second solenoid valve. Then, the metering and filling scale proceeds... Zeroing the scale and opening the first solenoid valve allows the gas supply to fill the cylinder through the first solenoid valve and the inlet connector. Once the metering scale reaches the weighing value, the first solenoid valve closes, and the cylinder opening valve mechanism drives the plum blossom handwheel to rotate in the opposite direction, closing the valve core. Then, the second solenoid valve opens again to recover the residual gas in the pipeline. After recovery, the filling cylinder resets, the cryogenic filling head separates from the filling port of the cylinder valve core, and then the tension spring resets, enabling the sliding assembly and cylinder valve mechanism to reset. The lifting module drives the cylinder opening valve mechanism and the cylinder suspension docking mechanism to reset. At this point, the filled cylinder can be moved out of the filling position.

[0006] Furthermore, the lifting module includes a first slide rail fixed to both sides of the front of the platform and positioned above the clamping rotation unit, with a first slider slidably mounted on the first slide rail; a slide plate fixed to the front of the first slider; a nut fixed to the back of the slide plate, with a lead screw screwed onto the nut, and the two ends of the lead screw being mounted to the platform via bearings; a lifting servo motor fixed to the top of the platform, the lifting servo motor being connected to the lead screw; the support ring plate includes an upper ring plate and a lower ring plate, with tapered flanges fixed to the four ends of the lower ring plate; the upper ring plate is slidably mounted to the tapered flanges via bearings; the second slide rail is fixed to both sides of the upper ring plate; and the lower ring plate is fixed to the front end of the slide plate.

[0007] The lifting servo motor drives the lead screw to rotate on the bearing. The rotational force is converted into linear lifting power through the lead screw nut, causing the first sliders on both sides of the slide plate to slide linearly along the first slide rail, thus enabling the bottle opening valve mechanism and the gas cylinder suspension docking mechanism to be sent into the filling position. When the gas cylinder suspension docking mechanism fills the gas cylinder, it first clamps the valve core of the gas cylinder through the low-temperature filling head and the centering pressure head. Then, the lower ring plate moves vertically downward, achieving frictionless sliding through the conical flange and bearing. At this time, the upper ring plate and the lower ring plate are in a separated state, with the upper ring plate floating on the gas cylinder. The lifting module The lifting power does not act on the gas cylinder, achieving physical isolation between the lifting module and the metering and filling scale, reducing weight interference and ensuring filling and metering accuracy. After the upper and lower ring plates are separated, the bottle opening valve mechanism operates to open the bottle valve. Before filling, the vision unit automatically identifies the gas cylinder information and detects the internal pressure of the gas cylinder. If the pressure is high, it automatically depressurizes. After depressurization, the system automatically weighs, tares, calculates the filling weight, and executes the filling action based on the traceability system data (gas cylinder tare weight, filling medium, filling pressure, inspection date). If the traceability data does not meet the filling conditions, the machine refuses to fill.

[0008] Furthermore, the vision unit includes a first support plate and a second support plate fixed to both sides of the bottom of the support ring plate. A label recognition unit and a bottle mouth alignment camera are fixed on the first support plate. An auxiliary light source is fixed at the bottle mouth alignment camera. The label recognition unit has the functions of identifying gas cylinder codes, automatically verifying the gas cylinder expiration date, inspecting the status and residual pressure data, locking the filling program for unqualified gas cylinders (expired, uninspected), and preventing the gas cylinder filling process from proceeding. It also monitors the pressure through a pressure transmitter. When the gas cylinder residual pressure is abnormal, it locks the filling program. The bottle mouth alignment camera identifies the valve core and controls the clamping and rotating unit to activate the clamping brake function, accurately adjusting the valve core orientation to ensure dynamic coaxial calibration of the valve core interface between the cryogenic filling head and the gas cylinder.

[0009] Furthermore, the clamping rotation unit includes a slide body, on which two third sliders are slidably disposed; an arc-shaped clamping arm is fixed on the third slider; multiple PU rollers are rotatably disposed on the clamping arm, and a shifting servo motor is fixed at the bottom of one clamping arm, the shifting servo motor being fixed to the shaft of one PU roller; a clamping cylinder is fixed at the end of the slide body, and the telescopic end of the clamping cylinder is fixed to the third slider; when the clamping arm clamps the gas cylinder, the PU rollers are in contact with the outside of the gas cylinder. The working process of the clamping and rotating unit is as follows: After the gas cylinder is placed, the clamping and rotating unit starts. The clamping cylinder is air-intaken under the control of the solenoid valve, driving the third slider to slide linearly closer to each other along the slide body, so that the clamping arms move synchronously to clamp the gas cylinder and firmly hold it. The pneumatic method can provide a stable and flexible clamping force, and the contact surface is a PU roller to prevent damage to the surface of the gas cylinder. Then, the shifting servo motor drives the PU roller to rotate, driving the gas cylinder to rotate synchronously along the rotating table, so that the gas cylinder rotates to the designated position (valve core alignment position), the motor brakes, and after filling is completed, the cylinder exhausts air, and the clamping arms return to their original position.

[0010] Furthermore, the bottle opening valve mechanism includes a support, on which a lifting cylinder is fixed. A first cover is fixed to the lifting end of the lifting cylinder, and a bottle opening servo motor is fixed to the top of the first cover. The output shaft of the bottle opening servo motor is connected to a bottle opening head via a coupling. A CCD module can be arranged at the bottle opening head to monitor the current posture of the plum blossom handwheel, thereby calculating the deviation angle between the protrusion of the plum blossom handwheel and the slot of the clamping cylinder. After the bottle opening servo motor compensates for the deviation angle, the lifting cylinder drives the bottle opening head to engage with the plum blossom handwheel. The servo motor, coupling, and bottle opening head constitute a torque-adjustable electric turning mechanism, supporting a torque output of 0-15 N.m (accuracy ±0.1 Nm), automatically completing the bottle valve opening and closing action and reducing manual intervention.

[0011] Furthermore, the bottle opener includes an outer cylinder and an inner column. A sliding key is fixed to the inner side of the inner column, and the sliding key is slidably installed with the inner side of the outer cylinder. The inner column extends movably through the bottom of the outer cylinder, and a retaining sleeve that engages with the plum blossom handwheel is fixed to the bottom of the inner column. A spring body is provided between the top of the inner side of the outer cylinder and the sliding key. The outer cylinder can slide linearly on the inner column, and the outer cylinder and the inner column are circumferentially limited. Under the action of the spring body, the inner column can extend from the bottom of the outer cylinder. When the bottle opener approaches the plum blossom handwheel of the gas cylinder, if the protrusion of the plum blossom handwheel is not aligned with the retaining slot of the retaining sleeve, the plum blossom handwheel abuts against the lower edge of the retaining sleeve. Then, the bottle opener slowly shifts at an angle, allowing the inner side of the retaining sleeve to smoothly engage with the plum blossom handwheel, thus achieving the movable engagement of the plum blossom handwheel and the retaining sleeve. Since the retaining sleeve and the plum blossom handwheel can slide vertically, they will not interfere with the metering accuracy of the filling scale.

[0012] Furthermore, the support ring plate is fixed with an angle seat on the side of the first seat plate and the second seat plate that are far apart from each other. A proximity switch is fixed on the angle seat. The position of the first seat plate and the second seat plate can be monitored by the proximity switch, so as to determine whether the valve core interface of the cryogenic gas filling head and the gas cylinder is fully sealed, and whether it is reset in place after sealing, so as to avoid the risk of offset leakage.

[0013] Furthermore, a second cover is fixed on the skateboard; the bottle opening valve mechanism and the gas cylinder suspension docking mechanism are located inside the second cover.

[0014] Furthermore, the clamping rotating unit is slidably disposed on the front side of the platform; a limit block is fixed at the bottom of the sliding end of the clamping rotating unit on the platform; the clamping rotating unit is directly fixed on the front side of the platform, or the clamping rotating unit is slidably disposed in order to eliminate interference in the weighing of the gas cylinder.

[0015] Furthermore, an audible and visual alarm is fixed on the top of the platform. When the gas cylinder is abnormal or an abnormality occurs during the filling process, the audible and visual alarm will be triggered.

[0016] Compared with existing technologies, the intelligent gas cylinder filling device of this invention can automatically receive gas cylinders; rotate and adjust the gas cylinder orientation; complete gas cylinder barcode scanning; accurately align the gas cylinder filling port and filling head; achieve high-sealing connection between the gas cylinder filling port and filling head; release and recover residual gas from the gas cylinder; and rotate and open and close the gas cylinder valve; thus realizing intelligent and high-precision operation of the entire gas cylinder filling process, as detailed below: (1) When the filling device receives the gas cylinder, it automatically corrects the verticality of the gas cylinder by integrating visual positioning and mechanical guiding mechanism, and with the bottom gas cylinder jacket, eliminates the risk of tipping during the filling process; (2) The bottle opening valve mechanism is a torque-adjustable electric rotary mechanism, which can automatically complete the bottle valve opening and closing action, reducing manual intervention; (3) The cylinder suspension docking mechanism uses a cylinder-driven clamp to achieve precise alignment and sealing connection between the filling head and the cylinder mouth, thus preventing gas leakage; (4) During filling, the filling pressure is monitored in real time, and a high-precision solenoid valve is used to control the release and filling of carbon dioxide; (5) The metering and filling scale supports automatic tare and net weight filling control. The inflation and positioning components are floating above the lower ring plate through the upper ring plate and are not controlled by the lifting end of the lifting module, resulting in high weighing accuracy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the front planar structure of the intelligent gas cylinder filling device of the present invention.

[0018] Figure 2 This is a side perspective structural diagram of the intelligent gas cylinder filling device of the present invention.

[0019] Figure 3 This is a front perspective structural diagram of the intelligent gas cylinder filling device of the present invention.

[0020] Figure 4 This is a schematic diagram of the overall structure of the intelligent gas cylinder filling device of the present invention in the state of no gas cylinder being loaded.

[0021] Figure 5 This is a schematic diagram of the overall structure of the bottle opening valve mechanism and the gas cylinder suspension docking mechanism of the present invention.

[0022] Figure 6 This is a schematic diagram of the lifting end structure of the bottle opening valve mechanism and the gas cylinder suspension docking mechanism of the present invention installed on the lifting module.

[0023] Figure 7 This is a side perspective structural diagram of the bottle opening valve mechanism and the gas cylinder suspension docking mechanism of the present invention.

[0024] Figure 8 This is a three-dimensional structural diagram of the top of the bottle opening valve mechanism and the gas cylinder suspension docking mechanism of the present invention.

[0025] Figure 9 This is a schematic diagram of the overall structure of the gas cylinder suspension docking mechanism of the present invention.

[0026] Figure 10 This is a three-dimensional structural diagram of the side of the clamping and rotating unit of the present invention.

[0027] Figure 11 This is a three-dimensional structural diagram of the bottom of the clamping and rotating unit of the present invention.

[0028] Figure 12 This is a schematic diagram of another embodiment of the bottle opener of the present invention.

[0029] Reference numerals: 1. Base; 2. Electrical control cabinet; 3. Measuring and filling scale; 4. Rotary table; 5. Cylinder clamp; 6. Clamping and rotating unit; 7. Cylinder opening valve mechanism; 8. Cylinder suspension and docking mechanism; 9. Second slide rail; 10. Second slider; 11. First base plate; 12. Second base plate; 13. Guide post; 14. Floating plate; 15. Three-way flow channel; 16. Cryogenic filling head; 17. Inlet connector; 18. Exhaust connector; 19. First solenoid valve; 20. Second solenoid valve; 21. Centering pressure head; 22. Filling cylinder; 23. Tension spring; 24. First slide rail; 25. Slide plate; 26. Lead screw. 27. Lifting servo motor; 28. Upper ring plate; 29. ​​Lower ring plate; 30. Conical flange; 31. First support plate; 32. Second support plate; 33. Label recognition unit; 34. Bottle mouth alignment camera; 35. Auxiliary light source; 36. Slide body; 37. Clamping arm; 38. PU roller; 39. Positioning servo motor; 40. Clamping cylinder; 41. Support; 42. First cover; 43. Bottle opening servo motor; 44. Bottle opening head; 45. Outer cylinder; 46. Inner column; 47. Clamping sleeve; 48. Angle seat; 49. Proximity switch; 50. Second cover; 51. Audible and visual alarm; 52. Gas cylinder. Detailed Implementation

[0030] Example: like Figures 1 to 12 The intelligent gas cylinder filling device shown includes: The platform 1 has an L-shaped structure, and the back of the platform 1 is fixed with an electrical control cabinet 2 for the whole machine control. The gas cylinder receiving unit includes a metering and filling scale 3 fixed to the bottom of the base 1. A rotating platform 4 is fixed to the top surface of the metering and filling scale 3, and a gas cylinder clamp 5 is fixed to the top of the rotating platform 4. After the gas cylinder 52 is placed into the gas cylinder clamp 5, the gas cylinder 52 is held tightly. The rotating platform 4 is set at the bottom of the gas cylinder clamp 5, which can drive the entire assembly to rotate. The metering and filling scale 3 adopts a 150kg intelligent weighing scale, supports net weight, total weight and composite filling modes, and automatically identifies the empty cylinder specifications and calculates the weight to be filled. The clamping and rotating unit 6 is disposed above the gas cylinder receiving unit and installed on the front side of the base 1; A lifting module, the lifting module comprising a component fixed to the upper part of the base 1; Bottle opening valve mechanism 7, which is fixed to the lifting end of the lifting module; A gas cylinder suspension docking mechanism 8 includes a support ring plate fixed to the lifting end of a lifting module. Second slide rails 9 are fixed on both sides of the support ring plate, and two sets of second sliders 10 are slidably mounted on the second slide rails 9. A first seat plate 11 and a second seat plate 12 are respectively fixed to the two opposing second sliders 10. Guide posts 13 are fixed on both sides between the first seat plate 11 and the second seat plate 12, and floating plates 14 are slidably mounted on the guide posts 13. A three-way flow channel 15 is integrally formed on the second seat plate 12. Low-temperature inflation heads 16 and air inlet connectors 17 are provided at both ends of the three-way flow channel 15, and an exhaust connector 18 is provided at the middle end of the three-way flow channel 15. A pressure transmitter is provided between the air inlet connector 17 and the three-way flow channel 15. The gas cylinder 52 is equipped with an inlet connector 17 connected to a gas supply source via a first solenoid valve 19, and an exhaust connector 18 connected to a venting and collection pipeline via a second solenoid valve 20. A centering pressure head 21 is fixed to the floating plate 14 opposite the cryogenic filling head 16. The cryogenic filling head 16 and the centering pressure head 21 cooperate to form an adaptive sealing clamp for the gas cylinder 52. For example, if the cryogenic filling head 16 is configured as a trumpet-shaped filling nozzle and an external sealing ring is provided, it can stably withstand a filling pressure of 10 MPa, preventing high-pressure gas leakage. A filling cylinder 22 is fixed at the center of the first base plate 11, and the piston rod of the filling cylinder 22 is fixed to the floating plate 14. Tension springs 23 are fixed on both sides of the second base plate 12 away from the cryogenic filling head 16, and the other end of the tension springs 23 is fixed to the support ring plate. A vision unit is disposed on both sides of the support ring plate.

[0031] After receiving gas cylinder 52, the gas cylinder receiving unit performs high-precision visual positioning of the cylinder opening position using a vision unit, and collects real-time data on the valve core's spatial coordinates and attitude angle. The PLC in the electrical control cabinet 2 analyzes the visual data, generates motion commands, and drives the cylinder opening valve mechanism 7 and the gas cylinder suspension docking mechanism 8 to move along a preset trajectory to above the valve core. The clamping and rotating unit 6 then operates, causing the gas cylinder 52 to slowly rotate on the rotary table 4. During rotation, the vision unit identifies the valve core, ensuring that the valve core is adjusted to a precise orientation, so that the cryogenic filling head 16 of the gas cylinder suspension docking mechanism 8 and the valve opening of the gas cylinder 52 achieve dynamic coaxial calibration (coaxial accuracy ≤ ±0.1mm). The clamping and rotating unit 6 clamps... After braking, the bottle opening valve mechanism 7 actuates, moving downwards by a fixed distance. Once the downward movement is complete, the actuating end of the bottle opening valve mechanism 7 aligns with the paddle wheel of the gas cylinder 52. Next, the gas cylinder suspension docking mechanism 8 actuates, specifically as follows: the filling cylinder 22 actuates, its piston rod extends, driving the floating plate 14 towards the valve core of the gas cylinder 52, causing the centering pressure head 21 to press against the outer wall of the valve core. As the piston rod continues to extend, due to the centering pressure head 21 being limited by the valve core of the gas cylinder 52, the first seat plate 11, the second seat plate 12, the guide post 13, the outer cylinder of the filling cylinder 22, and the second slider 10 form a sliding assembly. As the piston rod continues to extend, the sliding assembly slides in the opposite direction of the piston rod's extension, causing the second seat plate 11 to press against the outer wall of the valve core. The cryogenic filling head 16 of plate 12 is precisely aligned with the filling port of the valve core of gas cylinder 52, and continues to slide linearly with the sliding assembly, so that the cryogenic filling head 16 is tightly connected with the filling port; at this time, the tension spring 23 is continuously stretched, and then the bottle opening valve mechanism 7 drives the plum blossom handwheel to rotate, realizing the opening of the valve core. Then, the residual pressure is detected by the pressure transmitter. When the residual pressure exceeds the limit, the alarm is activated. If the residual pressure is below the threshold line, the second solenoid valve 20 is opened, and the residual gas is sent into the venting and collection pipeline through the exhaust connector 18 and the second solenoid valve 20. The venting and collection pipeline realizes the emptying of gas cylinder 52 and the external collection of residual gas. The second solenoid valve 20 is closed; then, the metering filling scale 3 performs tare and zeroing. The first solenoid valve 19 is opened, and the gas supply source fills the gas cylinder 52 with gas through the first solenoid valve 19 and the gas inlet connector 17. When the metering filling scale 3 reaches the weighing value, the first solenoid valve 19 is closed, and the bottle opening valve mechanism 7 drives the plum blossom handwheel to rotate in the opposite direction to close the valve core. Then, the second solenoid valve 20 is opened again to recover the residual gas in the pipeline. After the recovery is completed, the filling cylinder 22 is reset, the low temperature filling head 16 is separated from the filling port of the gas cylinder 52 valve core, and then the tension spring 23 is reset, which can reset the sliding assembly and the bottle valve mechanism. The lifting module drives the bottle opening valve mechanism 7 and the gas cylinder suspension docking mechanism 8 to reset. At this time, the gas cylinder 52 that has been filled can be moved out of the filling position.

[0032] The lifting module includes a first slide rail 24 fixed to the front two sides of the platform 1 and disposed above the clamping and rotating unit 6. A first slider is slidably disposed on the first slide rail 24. A slide plate 25 is fixed to the front side of the first slider. A screw nut is fixed to the back of the slide plate 25. A screw rod 26 is screwed onto the screw nut. The two ends of the screw rod 26 are installed to the platform 1 through bearings. A lifting servo motor 27 is fixed to the top of the platform 1. The lifting servo motor 27 is connected to the screw rod 26. The support ring plate includes an upper ring plate 28 and a lower ring plate 29. A tapered flange 30 is fixed to the four ends of the lower ring plate 29. The upper ring plate 28 is slidably installed with the tapered flange 30 through bearings. The second slide rail 9 is fixed to both sides of the upper ring plate 28. The lower ring plate 29 is fixed to the front end of the slide plate 25.

[0033] The lifting servo motor 27 drives the lead screw 26 to rotate on the bearing. The rotational force is converted into linear lifting power through the lead screw nut, so that the first sliders on both sides of the slide plate 25 slide linearly along the first slide rail 24, thereby enabling the bottle opening valve mechanism 7 and the gas cylinder suspension docking mechanism 8 to be sent into the filling position. When the gas cylinder suspension docking mechanism 8 fills the gas cylinder 52 with gas, it first clamps the valve core of the gas cylinder 52 through the low temperature filling head 16 and the centering pressure head 21. Then, the lower ring plate 29 moves vertically downward and achieves frictionless sliding through the tapered flange 30 and the bearing. At this time, the upper ring plate 28 and the lower ring plate 29 are in a separated state, and the upper ring plate 28 is floating on the gas cylinder 5. 2. The lifting power of the lifting module will not act on the gas cylinder 52, realizing physical isolation between the lifting module and the metering and filling scale 3, reducing weight interference and ensuring filling and metering accuracy; After the upper ring plate 28 and the lower ring plate 29 are separated, the bottle opening valve mechanism 7 operates to open the bottle valve. Before filling, the vision unit automatically identifies the information of the gas cylinder 52 and detects the internal pressure of the gas cylinder 52. If the pressure is high, it will automatically depressurize. After depressurization, the system will automatically weigh, tare, calculate the filling weight, and execute the filling action according to the traceability system data (tare weight of gas cylinder 52, filling medium, filling pressure, inspection date); when the traceability data does not meet the filling conditions, the machine will refuse to fill.

[0034] The vision unit includes a first support plate 31 and a second support plate 32 fixed on both sides of the bottom of the support ring plate. A label recognition unit 33 and a bottle mouth alignment camera 34 are fixed on the first support plate 31. An auxiliary light source 35 is fixed at the bottle mouth alignment camera 34. The label recognition unit 33 has the function of identifying the code of the gas cylinder 52, automatically verifying the expiration date of the gas cylinder 52, inspecting the status and residual pressure data, locking the filling program for unqualified gas cylinders 52 (overdue, uninspected), and not performing the filling process of gas cylinder 52. It also monitors the pressure through a pressure transmitter. When the residual pressure of the gas cylinder 52 is abnormal, the filling program is locked. The bottle mouth alignment camera 34 identifies the valve core and controls the clamping and rotating unit 6 to start the clamping and braking function, accurately adjusting the orientation of the valve core to ensure dynamic coaxial calibration of the valve core interface of the cryogenic filling head 16 and the gas cylinder 52.

[0035] The clamping and rotating unit 6 includes a slide body 36, on which two third sliders are slidably mounted; an arc-shaped clamping arm 37 is fixed on the third slider; multiple PU rollers 38 are rotatably mounted on the clamping arm 37; a shifting servo motor 39 is fixed to the bottom of one clamping arm 37, and the shifting servo motor 39 is fixed to the shaft of one PU roller 38; a clamping cylinder 40 is fixed to the end of the slide body 36, and the telescopic end of the clamping cylinder 40 is fixed to the third slider; when the clamping arm 37 clamps the gas cylinder 52, the PU rollers 38 are in contact with the outside of the gas cylinder 52. The working process of the clamping and rotating unit 6 is as follows: After the gas cylinder 52 is placed in, the clamping and rotating unit 6 starts. The clamping cylinder 40 is air-intaken under the control of the solenoid valve, driving the third slider to slide linearly closer to each other along the slide body 36, so that the clamping arm 37 moves synchronously to clamp the gas cylinder 52 and firmly hold the gas cylinder 52. The pneumatic method can provide a stable and flexible clamping force, and the contact surface is the PU roller 38 to prevent damage to the surface of the gas cylinder 52. Then, the shifting servo motor 39 drives the PU roller 38 to rotate, driving the gas cylinder 52 to rotate synchronously along the rotating table 4, so that the gas cylinder 52 rotates to the designated position (valve core alignment position) and the motor brakes. After filling is completed, the cylinder exhausts air and the clamping arm 37 returns to its original position.

[0036] The bottle opening valve mechanism 7 includes a support 41, on which a lifting cylinder is fixed. A first cover 42 is fixed to the lifting end of the lifting cylinder. A bottle opening servo motor 43 is fixed to the top of the first cover 42. The output shaft of the bottle opening servo motor 43 is connected to a bottle opening head 44 via a coupling. A CCD module can be arranged at the bottle opening head 44 to monitor the current posture of the plum blossom handwheel, thereby calculating the deviation angle between the protrusion of the plum blossom handwheel and the slot of the clamping cylinder. After the bottle opening servo motor 43 compensates for the deviation angle, the lifting cylinder drives the bottle opening head 44 to engage with the plum blossom handwheel. The servo motor, coupling, and bottle opening head 44 constitute a torque-adjustable electric turning mechanism, supporting a torque output of 0-15 N.m (accuracy ±0.1 Nm), automatically completing the bottle valve opening and closing action and reducing manual intervention.

[0037] The bottle opener 44 includes an outer cylinder 45 and an inner column 46. A sliding key is fixed to the inner side of the inner column 46, and the sliding key is slidably installed with the inner side of the outer cylinder 45. The inner column 46 movably protrudes from the bottom of the outer cylinder 45, and a retaining sleeve 47 that engages with a plum blossom handwheel is fixed to the bottom of the inner column 46. A spring body is provided between the top of the inner side of the outer cylinder 45 and the sliding key. The outer cylinder 45 can slide linearly on the inner column 46, and the outer cylinder 45 and the inner column 46 are circumferentially limited. Under the action of the spring body, the inner column 46... This allows the inner column 46 to extend from the bottom of the outer cylinder 45. When the bottle opener 44 approaches the plum blossom handwheel of the gas cylinder 52, and the protrusion of the plum blossom handwheel is not aligned with the slot of the clamping cylinder 47, the plum blossom handwheel abuts against the lower edge of the clamping cylinder 47. Then, the bottle opener 44 slowly shifts at an angle, allowing the inner side of the clamping cylinder 47 to smoothly engage with the plum blossom handwheel, thus achieving the movable engagement of the plum blossom handwheel and the clamping cylinder 47. Since the clamping cylinder 47 and the plum blossom handwheel can slide vertically, they will not interfere with the metering accuracy of the metering filling scale 3.

[0038] The support ring plate has a corner seat 48 fixed on the side of the first seat plate 11 and the second seat plate 12 that is far apart from each other. A proximity switch 49 is fixed on the corner seat 48. The position of the first seat plate 11 and the second seat plate 12 can be monitored by the proximity switch 49, so as to determine whether the valve core interface of the cryogenic gas filling head 16 and the gas cylinder 52 is fully sealed, and whether it is reset in place after sealing, so as to avoid the risk of offset leakage.

[0039] The second cover 50 is fixed on the slide plate 25; the bottle opening valve mechanism 7 and the gas cylinder suspension docking mechanism 8 are located inside the second cover 50.

[0040] The clamping and rotating unit 6 is slidably disposed on the front side of the base 1; a limit block is fixed at the bottom of the sliding end of the clamping and rotating unit 6 on the base 1; the clamping and rotating unit 6 is directly fixed on the front side of the base 1, or the clamping and rotating unit 6 is slidably disposed in order to eliminate the interference of the gas cylinder 52 weighing.

[0041] The top of the pedestal 1 is fixed with an audible and visual alarm 51. When the gas cylinder 52 is abnormal or the filling process is abnormal, the audible and visual alarm 51 will trigger an alarm.

[0042] The above embodiments are merely preferred embodiments of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present invention are included within the scope of the present invention.

Claims

1. An intelligent gas cylinder filling device, characterized in that: include: The platform has an L-shaped structure, and an electrical control cabinet for the whole machine is fixed on the back of the platform. A gas cylinder receiving unit includes a metering and filling scale fixed to the bottom of a base, a rotating platform fixed to the top surface of the metering and filling scale, and a gas cylinder clamp fixed to the top of the rotating platform. A clamping and rotating unit is disposed above the gas cylinder receiving unit and installed on the front side of the base; A lifting module, the lifting module comprising a component fixed to the upper part of the base; A bottle opening valve mechanism, which is fixed to the lifting end of the lifting module; A gas cylinder suspension docking mechanism includes a support ring plate fixed to the lifting end of a lifting module. Second slide rails are fixed on both sides of the support ring plate, and two sets of second sliders are slidably mounted on the second slide rails. A first seat plate and a second seat plate are respectively fixed to the two opposing second sliders. Guide posts are fixed on both sides between the first and second seat plates, and a floating plate is slidably mounted on the guide posts. A three-way flow channel is integrally formed on the second seat plate. Low-temperature filling heads and air inlet connectors are provided at both ends of the three-way flow channel, and an exhaust connector is provided at the middle end of the three-way flow channel. A pressure transmitter is provided between the air inlet connector and the three-way flow channel. The air inlet connector is connected to a gas supply source through a first solenoid valve, and the exhaust connector is connected to a venting and collection pipeline through a second solenoid valve. A centering pressure head is fixed to the floating plate opposite the low-temperature filling head. A filling cylinder is fixed at the center of the first seat plate, and the piston rod of the filling cylinder is fixed to the floating plate. Tension springs are fixed on both sides of the second seat plate away from the low-temperature filling head, and the other end of the tension springs is fixed to the support ring plate. A vision unit is disposed on both sides of the support ring plate.

2. The intelligent gas cylinder filling device according to claim 1, characterized in that: The lifting module includes a first slide rail fixed to both sides of the front of the platform and positioned above the clamping and rotating unit. A first slider is slidably mounted on the first slide rail. A slide plate is fixed to the front of the first slider. A nut is fixed to the back of the slide plate, and a lead screw is screwed onto the nut. Both ends of the lead screw are mounted to the platform via bearings. A lifting servo motor is fixed to the top of the platform and connected to the lead screw. The support ring plate includes an upper ring plate and a lower ring plate. Conical flanges are fixed to the four ends of the lower ring plate. The upper ring plate is slidably mounted to the conical flanges via bearings. A second slide rail is fixed to both sides of the upper ring plate. The lower ring plate is fixed to the front end of the slide plate.

3. The intelligent gas cylinder filling device according to claim 1, characterized in that: The vision unit includes a first support plate and a second support plate fixed to both sides of the bottom of the support ring plate. A label recognition unit and a bottle mouth alignment camera are fixed on the first support plate; an auxiliary light source is fixed at the bottle mouth alignment camera.

4. The intelligent gas cylinder filling device according to claim 1, characterized in that: The clamping and rotating unit includes a slide body with two third sliders slidably mounted on it. An arc-shaped clamping arm is fixed to each third slider. Multiple PU rollers are rotatably mounted on each clamping arm. A shifting servo motor is fixed to the bottom of one clamping arm and is fixed to the shaft of one of the PU rollers. A clamping cylinder is fixed to the end of the slide body, and the telescopic end of the clamping cylinder is fixed to the third slider. When the clamping arm clamps the gas cylinder, the PU rollers are in contact with the outside of the gas cylinder.

5. The intelligent gas cylinder filling device according to claim 1, characterized in that: The bottle opening valve mechanism includes a support, on which a lifting cylinder is fixed. A first cover is fixed to the lifting end of the lifting cylinder. A bottle opening servo motor is fixed to the top of the first cover. The output shaft of the bottle opening servo motor is connected to a bottle opening head via a coupling.

6. The intelligent gas cylinder filling device according to claim 5, characterized in that: The bottle opener includes an outer cylinder and an inner column. A sliding key is fixed on the inner side of the inner column, and the sliding key is slidably installed with the inner side of the outer cylinder. The inner column extends movably through the bottom of the outer cylinder, and a retaining sleeve that engages with a plum blossom handwheel is fixed at the bottom of the inner column. A spring body is provided between the top of the inner side of the outer cylinder and the sliding key.

7. The intelligent gas cylinder filling device according to claim 1, characterized in that: The support ring plate has an angle seat fixed on one side away from the first seat plate and the second seat plate, and a proximity switch is fixed on the angle seat.

8. The intelligent gas cylinder filling device according to claim 2, characterized in that: A second cover is fixed on the slide plate; the bottle opening valve mechanism and the gas cylinder suspension docking mechanism are located inside the second cover.

9. The intelligent gas cylinder filling device according to claim 1, characterized in that: The clamping rotating unit is slidably disposed on the front side of the base; a limit block is fixed at the bottom of the sliding end of the clamping rotating unit on the base.

10. The intelligent gas cylinder filling device according to claim 1, characterized in that: An audible and visual alarm is fixed to the top of the pedestal.

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