Steel cylinder positioning and identifying mechanism for small refrigerant steel cylinder filling line

Abstract

The utility model discloses a steel cylinder positioning and identifying mechanism for a refrigerant small steel cylinder filling line, which comprises a conveying belt, baffles are fixedly connected to two sides of the conveying belt, a support frame is fixedly mounted at the top of one end, close to the output side of the conveying belt, of one group of baffles, and a driving motor is fixedly mounted at the top of the support frame. Four groups of U-shaped plates which are arranged in an annular array mode are arranged between the two groups of baffles and located on the lower portion of the supporting frame, the upper ends and the lower ends of the four groups of U-shaped plates are respectively and fixedly connected with a group of fixing discs, and a connecting piece used for being connected with a filling head is arranged at the end, located on the upper portion, of the supporting frame. And the pressure sensor is matched to provide accurate pressure feedback when the filling head is butted with the small steel cylinder, so that the butting process of the filling head and the small steel cylinder does not depend on artificial visual judgment any more, and accurate butting is ensured through data of the pressure sensor.

Description

Technical Field

[0001] This utility model belongs to the technical field of refrigerant filling equipment, specifically relating to a cylinder positioning and identification mechanism for a refrigerant small cylinder filling line. Background Technology

[0002] Refrigerant is the medium through which energy conversion is accomplished in various heat engines, and it usually needs to be stored and used in steel cylinders.

[0003] Chinese patent CN222256115U discloses a refrigerant cylinder positioning mechanism, including a fixed base plate, a lifting bracket, a positioning sleeve, and a side positioning clamp. A frame is welded to the four corners of the top surface of the fixed base plate, and a top plate is welded to the top of the frame. Bidirectional lead screws are symmetrically installed between the fixed base plate and the top plate, and the top of the bidirectional lead screws is connected to the output end of a servo motor. Connecting blocks are symmetrically welded to both sides of the positioning sleeve and the lifting bracket, and lead screw sleeves are fixedly installed inside the connecting blocks. The lead screw sleeves are threaded with bidirectional lead screws. Fixed inclined plates are symmetrically welded to the frame. This technical solution utilizes a single servo motor to complete the lifting, positioning, and side-limiting clamping of the refrigerant cylinder, making it not only more convenient to use but also reducing the manufacturing cost and power consumption of the device, thus enhancing its practicality.

[0004] The above scheme relies mainly on visual observation and experience to judge the position and distance of the gas cylinder when controlling the movement of the positioning mechanism. However, human visual judgment is prone to errors, especially in long-term work or complex working environments. Inaccurate judgments may occur, leading to misjudgment of the distance between the gas cylinder and the positioning clamp, causing the clamp to move excessively and damage the surface of the gas cylinder, or the movement distance may be insufficient, failing to make full contact with the gas cylinder and thus failing to achieve effective positioning.

[0005] To address this, a cylinder positioning and identification mechanism for refrigerant small cylinder filling lines is proposed. Utility Model Content

[0006] The purpose of this invention is to provide a cylinder positioning and identification mechanism for a refrigerant small cylinder filling line, so as to solve the technical defects of low effectiveness due to human intervention in judging distance during the filling and positioning process.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A cylinder positioning and identification mechanism for a refrigerant small cylinder filling line includes a conveyor belt with baffles fixedly connected to both sides. A support frame is fixedly installed at the top of one set of baffles near the output side of the conveyor belt, and a drive motor is fixedly installed at the top of the support frame. Four sets of U-shaped plates are arranged in a circular array between the two sets of baffles and at the lower part of the support frame. Each set of U-shaped plates has a clamping component inside for clamping the small cylinders storing refrigerant. A set of fixed discs is fixedly connected to the upper and lower ends of the four sets of U-shaped plates. A connector for connecting a filling head is provided at the upper end of the support frame. The output shaft of the drive motor passes downward through the surface of the support frame and is fixedly connected to the top of the upper fixed disc.

[0009] The connector includes a Z-shaped plate fixedly connected to the upper end of the support frame. The upper end of the Z-shaped plate is connected to a mounting plate via an extension. An electric push rod is fixedly installed on the top of the mounting plate. The telescopic end of the electric push rod passes downward through the mounting plate and is fixedly connected to an extension rod. A pressure sensor is fixedly connected to the end of the extension rod. The detection end of the pressure sensor is fixedly connected to the top of the filling head. A stabilizing element is provided on the end surface of the extension rod to stabilize the filling head and prevent it from shifting.

[0010] As a further embodiment of this utility model, the extension member includes an insert plate that is inserted into the upper end of the Z-shaped plate. One end of the insert plate is fixedly connected to the surface of the mounting plate. A fixing bolt is threadedly connected to the top of the Z-shaped plate, and the end of the fixing bolt abuts against the surface of the insert plate downwards.

[0011] As a further embodiment of this utility model, the stabilizing component includes a fixing plate sleeved on the surface of the extension rod, with T-shaped rods inserted into the top of both sides of the fixing plate, and the ends of the two sets of T-shaped rods respectively penetrating downward through the fixing plate and fixedly connected to the top of the filling nozzle.

[0012] As a further embodiment of this utility model, the clamping member has a square hole in the middle of each U-shaped plate. An arc-shaped clamping plate is provided on both sides of each square hole. A sector gear is fixedly connected to one end of each set of arc-shaped clamping plates. The tooth surfaces of the two sets of sector gears on the same side mesh together. A connecting post is rotatably inserted into the surface of each set of sector gears. A connecting plate is sleeved on the end of each set of connecting posts on the same side. The ends of the two sets of connecting plates on the same side are fixedly connected to the surface of the U-shaped plate. A limiting plate is inserted into the surface of the baffle near the filling head. A pushing member is provided on the surface of the baffle to push the limiting plate inward. When the end of one set of arc-shaped clamping plates contacts the limiting plate, the end moves inward and moves inward simultaneously with the meshing of the sector gear and the other set of arc-shaped clamping plates to clamp the small steel bottle.

[0013] As a further embodiment of this utility model, the pushing member includes a U-shaped plate fixedly connected to the outside of one of the baffles. A hand-tightening bolt is threadedly connected to the surface of the U-shaped plate. The end thread of the hand-tightening bolt passes through the U-shaped plate and is rotatably connected to the end surface of the limiting plate.

[0014] As a further embodiment of this utility model, a T-shaped tube is fixedly installed on the back of each U-shaped plate, and a cylinder is fixedly connected to both ends of the T-shaped tube. A spring is provided in the inner cavity of each cylinder. The ends of the two sets of springs on the same side are connected to sliding discs. A connecting rod is fixedly connected to the opposite end of the two sets of sliding discs on the same side. The opposite ends of the two sets of connecting rods pass through the corresponding side surface of the T-shaped tube and are rotatably connected to the surface of the corresponding side sector gear.

[0015] As a further embodiment of this utility model, each of the two sets of baffles has an inclined guide plate fixedly connected to one side of its opposite surface, and the channel formed between the two sets of guide plates is aligned with the inner cavity of the U-shaped plate.

[0016] As a further embodiment of this utility model, a controller is fixedly connected to one side of the support frame, and the drive motor and electric push rod are controlled by the controller.

[0017] Compared with existing technologies, the cylinder positioning and identification mechanism for a refrigerant small cylinder filling line provided by this utility model has the following advantages:

[0018] 1. In this utility model, the connector is used to connect the filling head and, together with the pressure sensor, can provide accurate pressure feedback when the filling head docks with the small steel bottle. This makes the docking process between the filling head and the small steel bottle no longer rely on manual visual judgment, but ensures accurate docking through the data of the pressure sensor, thus avoiding the problem of poor docking caused by human judgment error.

[0019] 2. This utility model, through the setting of clamping components, has the end of the arc-shaped clamping plate contacting the limiting plate, thereby moving the end of the arc-shaped clamping plate inward. Furthermore, the meshing transmission of the sector gear enables the two sets of arc-shaped clamping plates to move inward synchronously to clamp the small steel bottle. No additional power source is required. The structure is ingenious and highly automated, improving the positioning efficiency of the small steel bottle. At the same time, the design of the arc-shaped clamping plate conforms to the shape of the small steel bottle, which can apply force evenly and avoid damage to the surface of the small steel bottle, while ensuring that the small steel bottle is stable and does not shake during the filling process.

[0020] 3. This utility model achieves unified automated control of the drive motor, electric push rod, and filling machine through the setting of the controller. The operator only needs to set the relevant parameters on the controller, and the equipment can automatically complete a series of operations such as conveying, positioning, clamping, and filling of small steel bottles according to the preset program. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only examples of embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the structure of an embodiment of the present utility model. Figure 2 ;

[0024] Figure 3 This is a cross-sectional view of the U-shaped plate in an embodiment of the present invention;

[0025] Figure 4 for Figure 2 A magnified structural diagram of point A in the middle.

[0026] Figure label:

[0027] 100. Conveyor belt; 101. Baffle; 102. Guide plate; 103. Support frame; 104. Drive motor; 105. Fixed plate; 106. U-shaped plate; 107. U-shaped plate; 108. Limiting plate; 109. Hand-tightening bolt;

[0028] 200. Arc-shaped clamping plate; 201. Connecting plate; 202. Connecting column; 203. Square hole; 204. Sector gear;

[0029] 300. Z-shaped plate; 301. Insert plate; 302. Fixing bolt; 303. Electric push rod; 304. Mounting plate; 305. Fixing plate; 306. T-shaped rod; 307. Pressure sensor; 308. Filling head; 309. Controller; 310. Extension rod;

[0030] 400. T-shaped tube; 401. Cylinder; 402. Spring; 403. Sliding disc; 404. Connecting rod. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0032] In the description of the embodiments of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model 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 the embodiments of this utility model.

[0033] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0034] See appendix Figure 1-4 As shown in the figure, a cylinder positioning and identification mechanism for a refrigerant small cylinder filling line according to an embodiment of the present invention includes a conveyor belt 100, with baffles 101 fixedly connected to both sides of the conveyor belt 100. A support frame 103 is fixedly installed on the top of one end of the baffles 101 near the output side of the conveyor belt 100. A drive motor 104 is fixedly installed on the top of the support frame 103. Four sets of U-shaped plates 106 arranged in a circular array are provided between the two sets of baffles 101 and at the lower part of the support frame 103. Each set of U-shaped plates 106 has a clamping member inside for clamping the small cylinders storing refrigerant. A set of fixed disks 105 are fixedly connected to the upper and lower ends of the four sets of U-shaped plates 106. A connector for connecting a filling head 308 is provided at the upper end of the support frame 103. The output shaft of the drive motor 104 passes downward through the surface of the support frame 103 and is fixedly connected to the top of the fixed disk 105 located above.

[0035] The connector includes a Z-shaped plate 300 fixedly connected to the upper end of the support frame 103. The upper end of the Z-shaped plate 300 is connected to a mounting plate 304 via an extension. An electric push rod 303 is fixedly installed on the top of the mounting plate 304. The telescopic end of the electric push rod 303 passes downward through the mounting plate 304 and is fixedly connected to an extension rod 310. A pressure sensor 307 is fixedly connected to the end of the extension rod 310. The detection end of the pressure sensor 307 is fixedly connected to the top of the filling head 308. A stabilizing element is provided on the end surface of the extension rod 310 to stabilize the filling head 308 and prevent it from shifting. Through the connector, the connector is used to connect the filling head 308 and, in conjunction with the pressure sensor 307, can provide accurate pressure feedback when the filling head 308 docks with the small steel bottle. This means that the docking process between the filling head 308 and the small steel bottle no longer relies on manual visual judgment, but rather on the data from the pressure sensor 307 to ensure accurate docking, avoiding the problem of poor docking caused by human judgment error.

[0036] The filling head 308 is a well-known technical means among those skilled in the art. For its specific structure and working principle, please refer to the filling head 308 in a refrigerant filling device with publication number CN219367415U.

[0037] The extension includes an insert plate 301 that is inserted into the upper end of the Z-shaped plate 300. One end of the insert plate 301 is fixedly connected to the surface of the mounting plate 304. A fixing bolt 302 is threadedly connected to the top of the Z-shaped plate 300. The end of the fixing bolt 302 abuts against the surface of the insert plate 301. By setting the extension, the position of the mounting plate 304 and the filling head 308 can be conveniently adjusted according to the diameter of small steel bottles of different specifications, making the equipment suitable for filling operations of small steel bottles of various sizes and enhancing the versatility of the equipment.

[0038] The stabilizing component includes a fixing plate 305 sleeved on the surface of the extension rod 310. T-shaped rods 306 are inserted into the top of both sides of the fixing plate 305. The ends of the two sets of T-shaped rods 306 pass downward through the fixing plate 305 and are fixedly connected to the top of the filling nozzle. Through the setting of the stabilizing component, the fixing plate 305 and the T-shaped rods 306 in the stabilizing component securely connect the filling head 308 to the extension rod 310. During the process of the electric push rod 303 driving the filling head 308 to move up and down, it effectively prevents the filling head 308 from shifting or shaking, ensuring that the filling head 308 is accurately aligned with the mouth of the small steel bottle, thereby improving filling accuracy and stability.

[0039] The clamping element has a square hole 203 in the middle of each U-shaped plate 106. Each set of square holes 203 has an arc-shaped clamping plate 200 on both sides. A sector gear 204 is fixedly connected to one end of each set of arc-shaped clamping plates 200. The teeth of the two sets of sector gears 204 on the same side mesh together. A connecting post 202 is rotatably inserted into the surface of each set of sector gears 204. A connecting plate 201 is sleeved at the end of each set of connecting posts 202 on the same side. The ends of the two sets of connecting plates 201 on the same side are fixedly connected to the surface of the U-shaped plate 106. A limiting plate 108 is inserted into the surface of a baffle 101 near the filling head 308. A pushing element that pushes the limiting plate 108 inwards is provided on the surface of the baffle 101. When one set of… The end of the arc-shaped clamp 200 contacts the limiting plate 108, thereby moving the end inward. Simultaneously, the arc-shaped clamp 200 moves inward with the meshing of the sector gear 204 to clamp the small steel bottle. Through the setting of the clamping components, the end of the arc-shaped clamp 200 contacts the limiting plate 108, thereby moving the end of the arc-shaped clamp 200 inward. The meshing transmission of the sector gear 204 enables the two sets of arc-shaped clamps 200 to move inward synchronously to clamp the small steel bottle. No additional power source is required. The structure is ingenious and highly automated, improving the positioning efficiency of the small steel bottle. At the same time, the design of the arc-shaped clamp 200 conforms to the shape of the small steel bottle, which can apply force evenly and avoid damage to the surface of the small steel bottle. It also ensures that the small steel bottle is stable and does not shake during the filling process.

[0040] The pushing component includes a U-shaped plate 107 fixedly connected to the outside of one of the baffles 101. A hand-tightening bolt 109 is threadedly connected to the surface of the U-shaped plate 107. The end thread of the hand-tightening bolt 109 passes through the U-shaped plate 107 and is rotatably connected to the end surface of the limiting plate 108. By setting the pushing component, the position of the limiting plate 108 can be precisely adjusted according to the diameter of the small steel cylinder, thereby adjusting the initial spacing of the clamping component and ensuring that the clamping plate can accurately contact the small steel cylinder and achieve effective positioning.

[0041] Each U-shaped plate 106 has a T-shaped tube 400 fixedly installed on its back. Both ends of the T-shaped tube 400 are fixedly connected to cylinders 401. Each cylinder 401 has a spring 402 inside its cavity. The ends of the two sets of springs 402 on the same side are connected to sliding discs 403. The opposite ends of the two sets of sliding discs 403 on the same side are fixedly connected to connecting rods 404. The opposite ends of the two sets of connecting rods 404 pass through the corresponding side surface of the T-shaped tube 400 and are rotatably connected to the surface of the corresponding side sector gear 204. With the setting of springs 402, after filling is completed, springs 402 push sector gears 204 to reset, driving arc-shaped clamps 200 to reset, preparing for the clamping of the next set of small steel cylinders, ensuring the continuity and stability of equipment operation, and improving the adaptability of equipment to different small steel cylinders.

[0042] Two sets of baffles 101 are fixedly connected to inclined guide plates 102 on opposite sides of their surfaces. The channel formed between the two sets of guide plates 102 is aligned with the inner cavity of the U-shaped plate 106. Through the setting of the guide plates 102, the channel formed by the inclined guide plates 102 can guide the small steel bottle to slide accurately into the inner cavity of the U-shaped plate 106, reducing the difficulty and time of manual placement of the small steel bottle, improving feeding efficiency, and ensuring that the small steel bottle is in a proper position when it enters the U-shaped plate 106, providing a good foundation for subsequent clamping and filling operations, and improving the continuity and accuracy of the entire filling process.

[0043] A controller 309 is fixedly connected to one side of the support frame 103. The drive motor 104 and the electric push rod 303 are controlled by the controller 309. The output end of the controller 309 is electrically connected to the control end of the filling machine through a wire. The signal output end of the pressure sensor 307 is electrically connected to the signal input end of the controller 309 through a wire. Through the settings of the controller 309, the unified automated control of the drive motor 104, the electric push rod 303 and the filling machine is realized. The operator only needs to set the relevant parameters on the controller 309, and the equipment can automatically complete a series of operations such as conveying, positioning, clamping and filling of small steel bottles according to the preset program.

[0044] The filling machine is a well-known technical means in the art. For its specific working principle and structure, please refer to the filling machine in the ozone-environmentally friendly air conditioning refrigerant production equipment with publication number CN216556474U. At the same time, how the filling head 308 is connected to the filling machine and how the controller 309 is wired and debugged with the filling machine are all existing technologies.

[0045] When using this embodiment of the utility model, turn the hand-tightening bolt 109 to adjust the position of the limiting plate 108 on the baffle 101, set an appropriate clamping distance according to the diameter of the small steel bottle, loosen the fixing bolt 302, move the insert plate 301 so that the filling head 308 corresponds to the mouth of the small steel bottle, then tighten the fixing bolt 302 to fix the insert plate 301, then start the drive motor 104, and control the drive motor 104 to rotate 90 degrees each time through the controller 309.

[0046] Small steel cylinders are placed sequentially on the surface of the conveyor belt 100. The small steel cylinders are placed along the channel between two sets of inclined guide plates 102. The conical channel formed by the guide plates 102 automatically guides the small steel cylinders to slide into the inner cavity of the U-shaped plate 106, reducing manual alignment operations.

[0047] The drive motor 104 rotates 90 degrees toward the filling head 308, moving the small steel bottle below the filling head 308.

[0048] During the rotation, the end of the arc-shaped clamp 200 on the left side contacts the limiting plate 108, and under the push of the limiting plate 108, the arc-shaped clamp 200 rotates inward around the connecting column 202. Through the meshing transmission of the sector gear 204, the arc-shaped clamp 200 on the other side moves inward synchronously, so as to achieve stable clamping and fixing of the small steel cylinder.

[0049] The controller 309 controls the electric push rod 303, and the telescopic end pushes the extension rod 310, pressure sensor 307 and filling head 308 downward. The stabilizing component composed of T-shaped rod 306 and fixed plate 305 ensures that the filling head 308 descends vertically and prevents deviation. The pressure sensor 307 monitors the contact pressure between the filling head 308 and the mouth of the small steel bottle in real time. When the pressure reaches the set value, the electric push rod 303 stops to ensure a sealed connection.

[0050] The refrigerant delivery system is turned on, and refrigerant is injected into the small steel cylinder through the filling head 308. The pressure sensor 307 continuously monitors the filling pressure to ensure a safe and stable filling process.

[0051] After filling is completed, the electric push rod 303 retracts, causing the filling head 308 to disengage from the bottle neck. The controller 309 controls the drive motor 104 to rotate 90 degrees, thereby rotating the filled bottle to the output end of the conveyor belt 100. At the same time, the end of the arc-shaped clamp 200 moves away from the limiting plate 108, and the sector gear 204 is reset under the push of the spring 402, thereby driving the arc-shaped clamp 200 to reset. Then, the next set of bottles rotates to the lower part of the filling head 308 for filling.

[0052] In summary, the connector in the cylinder positioning and identification mechanism of the refrigerant small cylinder filling line of this utility model embodiment is used to connect the filling head 308 and, together with the pressure sensor 307, can provide accurate pressure feedback when the filling head 308 docks with the small cylinder. This means that the docking process between the filling head 308 and the small cylinder no longer relies on manual visual judgment, but rather on the data from the pressure sensor 307 to ensure accurate docking, thus avoiding the problem of poor docking caused by human judgment error.

[0053] The foregoing has shown and described the basic principles of the present invention. The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. The above embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Any modifications, equivalent substitutions, and improvements made within the scope of the present invention without departing from the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A cylinder positioning and identifying mechanism for a refrigerant cylinder filling line, comprising a conveyor belt (100), characterized in that: The both sides of the conveying belt (100) are fixedly connected with baffle plates (101), one end of a group of the baffle plates (101) near the output side of the conveying belt (100) is fixedly installed with a support frame (103) on the top, the top of the support frame (103) is fixedly installed with a driving motor (104), four groups of U-shaped plates (106) arranged in an annular array are arranged between the two groups of baffle plates (101) and at the lower part of the support frame (103), the inside of each group of the U-shaped plates (106) is provided with a clamping piece for clamping a small steel cylinder storing refrigerant, the upper and lower ends of the four groups of U-shaped plates (106) are fixedly connected with a group of fixed discs (105), the upper end of the support frame (103) is provided with a connecting piece for connecting a filling head (308), and the output shaft of the driving motor (104) penetrates through the surface of the support frame (103) downward and is fixedly connected to the top of the upper fixed disc (105).

2. The cylinder positioning and identifying mechanism of a refrigerant cylinder filling line according to claim 1, characterized in that: The connecting piece comprises a Z-shaped plate (300) fixedly connected to the upper end of the support frame (103), the upper end of the Z-shaped plate (300) is connected with a mounting disc (304) through an extension piece, the top of the mounting disc (304) is fixedly installed with an electric push rod (303), the telescopic end of the electric push rod (303) penetrates through the mounting disc (304) downward and is fixedly connected with an extension rod (310), the end of the extension rod (310) is fixedly connected with a pressure sensor (307), the detection end of the pressure sensor (307) is fixedly connected to the top of the filling head (308), and the end surface of the extension rod (310) is provided with a stabilizing piece for stabilizing the filling head (308) and preventing it from deviating.

3. The cylinder positioning and identifying mechanism of a refrigerant cylinder filling line according to claim 2, characterized in that: The extension piece comprises a plug-in plate (301) plugged into the upper end of the Z-shaped plate (300), one end of the plug-in plate (301) is fixedly connected to the surface of the mounting disc (304), and the top of the Z-shaped plate (300) is threadedly connected with a fixing bolt (302), and the end of the fixing bolt (302) abuts against the surface of the plug-in plate (301) downward.

4. The cylinder positioning and identifying mechanism of a refrigerant cylinder filling line according to claim 3, characterized in that: The stabilizing piece comprises a fixing plate (305) sleeved on the surface of the extension rod (310), T-shaped rods (306) are plugged into the top of the both sides of the fixing plate (305), and the ends of the two groups of T-shaped rods (306) penetrate through the fixing plate (305) downward and are fixedly connected to the top of the filling nozzle, respectively.

5. The cylinder positioning and identifying mechanism of a refrigerant cylinder filling line according to claim 4, characterized in that: The clamping piece is a square hole (203) in the middle of each group of U-shaped plates (106), both sides of each group of square holes (203) are provided with arc-shaped clamping plates (200), the opposite ends of the two groups of arc-shaped clamping plates (200) are fixedly connected with sector gears (204), the tooth surfaces of the two groups of sector gears (204) on the same side are engaged together, the surfaces of the two groups of sector gears (204) are rotatably inserted with connecting columns (202), the end portions of the two groups of connecting columns (202) on the same side are sleeved with connecting plates (201), the end portions of the two groups of connecting plates (201) on the same side are fixedly connected to the surfaces of the U-shaped plates (106), the surface of the baffle (101) on the side close to the filling head (308) is inserted with a limiting plate (108), the surface of the baffle (101) is provided with a pushing piece for pushing the limiting plate (108) inward, when the end portion of one group of arc-shaped clamping plates (200) contacts the limiting plate (108) and moves inward, and the engagement of the sector gears (204) moves the other group of arc-shaped clamping plates (200) inward to clamp the small steel cylinder.

6. The cylinder positioning and identifying mechanism of a refrigerant cylinder filling line according to claim 5, characterized in that: The pushing piece comprises a U-shaped plate (107) fixedly connected to the outer side of one group of baffles (101), the surface of the U-shaped plate (107) is threadedly connected with a hand screw bolt (109), the end portion of the hand screw bolt (109) is threadedly penetrated through the U-shaped plate (107) and rotatably connected to the end surface of the limiting plate (108).

7. The cylinder positioning and identifying mechanism of a refrigerant cylinder filling line according to claim 6, characterized in that: The back of each group of U-shaped plates (106) is fixedly installed with a T-shaped pipe (400), the two side end portions of the T-shaped pipe (400) are fixedly connected with cylinders (401), the inner cavities of each group of cylinders (401) are provided with springs (402), the end portions of the two groups of springs (402) on the same side are connected with sliding discs (403), the opposite ends of the two groups of sliding discs (403) on the same side are fixedly connected with connecting rods (404), the opposite end portions of the two groups of connecting rods (404) respectively penetrate through the corresponding side surfaces of the T-shaped pipes (400) and are rotatably connected to the surfaces of the corresponding side sector gears (204).

8. The cylinder positioning and identifying mechanism of a refrigerant cylinder filling line according to claim 7, characterized in that: The opposite side surfaces of the two groups of baffles (101) are fixedly connected with guide plates (102) arranged in an inclined manner, and the channel formed between the two groups of guide plates (102) is aligned with the inner cavities of the U-shaped plates (106).

9. The cylinder positioning and identifying mechanism of a refrigerant cylinder filling line according to claim 8, characterized in that: One side of the support frame (103) is fixedly connected with a controller (309), and the driving motor (104) and the electric push rod (303) are controlled by the controller (309).

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