Refrigerant storing and filling equipment

Abstract

The invention discloses refrigerant storing and filling equipment, and belongs to the field of gas cylinder filling. Refrigerant storing and filling equipment comprises a frame body, a conveying belt installed in the frame body and a filling mechanism installed in the frame body. Transfer units are uniformly mounted on the conveying belt; the transfer unit comprises a frame body and two clamping mechanisms symmetrically arranged in the frame body in the front-back direction. The frame body comprises a containing cavity used for containing a gas cylinder and a mounting cavity located below the containing cavity. The clamping mechanism comprises a flexible clamping belt and a tightening turntable rotationally arranged in the mounting cavity; the two ends of the clamping belt are fixedly connected with the tightening turntable; when the clamping belt is in an undetermined state, the clamping belt is encircled into a ring shape to form a tightening opening for accommodating a gas cylinder; no matter how the diameter of the gas cylinder changes, when the gas cylinder is clamped by the clamping belt, the clamping belt can be fully attached to the outer wall of the gas cylinder.

Description

Technical Field

[0001] The invention belongs to the field of gas cylinder filling, and more specifically, relates to a refrigerant storage and filling device. Background Art

[0002] Before adding liquefied hydrocarbon refrigerant into the gas cylinder, the gas cylinder needs to be supported and fixed. The commonly used clamping station nowadays is an arc-shaped clamp with the same diameter as the gas cylinder, which can completely fit on the surface of the gas cylinder and clamp the gas cylinder stably.

[0003] However, when facing different types of gas cylinders, the diameters and heights of the gas cylinders are different. If the same clamp is used to clamp gas cylinders of different diameters, a gap will be generated between the clamp and the gas cylinder, and the contact area between the clamp and the gas cylinder will be too small, resulting in unstable clamping. At the same time, due to the small contact area, the local pressure on the outer wall of the gas cylinder is too high, which can easily damage the surface of the gas cylinder and cause dents in the gas cylinder. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a refrigerant storage and filling device, which can stably clamp gas cylinders of different models.

[0005] A refrigerant storage and filling device of the present invention comprises a frame, a conveyor belt installed in the frame, and a filling mechanism installed in the frame; transfer units are evenly installed on the conveyor belt; the transfer unit comprises a frame, two groups of clamping mechanisms symmetrically arranged in the frame along the front-back direction; the frame comprises a accommodating cavity for placing gas cylinders and an installation cavity located below the accommodating cavity; the clamping mechanism comprises a flexible clamping belt and a tightening turntable rotating in the installation cavity; the two ends of the clamping belt are fixedly connected to the tightening turntable; when the clamping belt is in a pending state, the clamping belt is surrounded in a ring shape to form a tightening mouth for accommodating the gas cylinder; when the tightening turntable rotates forward, the clamping belt is wound around the tightening turntable, and the tightening mouth is reduced until the clamping belt is tightly against the surface of the gas cylinder.

[0006] As a further improvement of the present invention, the clamping mechanism also includes two groups of pulling components symmetrically distributed along the left and right directions; the pulling component includes a pulling frame, a rotating roller rotatably connected to the pulling frame and abutting against the inner circumference of the clamping belt, and a pulling turntable rotatably connected to the accommodating cavity; a pull rope is wound on the pulling turntable; one end of the pull rope is fixedly connected to the pulling frame; when the pulling turntable rotates in the opposite direction, the pull rope is wound on the pulling turntable, and the rotating roller drives the clamping belt to move toward the pulling turntable, and the tightening opening is expanded.

[0007] As a further improvement of the present invention, upper screws are respectively arranged on the left and right sides of the upper part of the accommodating cavity; the upper screw on the left is connected to the pulling turntable on the left side of the two clamping mechanisms through threaded transmission; the upper screw on the right is connected to the pulling turntable on the right side of the two clamping mechanisms through threaded transmission; a lower screw is rotatably connected in the installation cavity; the lower screw is connected to the tightening turntables in the two clamping mechanisms through threaded transmission; a switching frame that can prevent the upper screw and the lower screw from rotating is slidably connected in the frame.

[0008] As a further improvement of the present invention, the upper screw is provided with two sections of upper threads with opposite rotation directions, and one upper thread cooperates with a pulling turntable; the lower screw is provided with two sections of lower threads with opposite rotation directions, and one lower thread cooperates with a tightening turntable, so that the movement directions of the two clamping mechanisms are opposite.

[0009] As a further improvement of the present invention, a lower pressure block is slidably connected to the lower part of the accommodating chamber; an extension rod extending into the installation chamber is fixedly connected to the lower pressure block; a driving inclined surface that abuts against the extension rod is provided on the switching frame; when the gas cylinder is placed in the accommodating chamber, the gas cylinder will abut against the lower pressure block, causing the lower pressure block to move to the lower extreme position.

[0010] As a further improvement of the present invention, a driving mechanism is arranged in the installation cavity; the driving mechanism includes a positioning plate fixed in the installation cavity, a motor arranged on the positioning plate, and a motor gear arranged on the output shaft of the motor; two connecting gears are rotatably connected to the positioning plate; an arc groove coaxial with the motor gear is arranged on the positioning plate; a switching gear meshing with the motor gear is slidably connected in the arc groove; one connecting gear is transmission connected to each tightening turntable; and the other connecting gear is transmission connected to each pulling turntable.

[0011] As a further improvement of the present invention, a pulling gear is coaxially arranged on the pulling turntable; two upper gear rollers are rotatably connected in the accommodating cavity; the upper gear rollers are meshed with the pulling gear; a tightening gear is coaxially arranged on the tightening turntable; a lower gear roller meshed with the tightening gear is rotatably connected in the mounting cavity; one of the connecting gears is connected to the upper gear roller through a belt drive; and the other connecting gear is connected to the lower gear roller through a belt drive.

[0012] As a further improvement of the present invention, the motor gear slides axially on the output shaft of the motor; each connecting gear is coaxially provided with a synchronous gear; when the motor gear is in the first position, the motor gear is only engaged with the switching gear; when the motor gear is in the second position, the motor gear is only engaged with two synchronous gears.

[0013] As a further improvement of the present invention, the axial direction of the motor gear is parallel to the sliding direction of the switching frame; a synchronization slot is circumferentially arranged on the motor gear; and a synchronization rod connected to the synchronization slot is arranged on the switching frame.

[0014] As a further improvement of the present invention, a loading slope is provided on the frame; the upper end of the loading slope is directly opposite to the accommodating cavity.

[0015] Compared with the prior art, the beneficial effect of the present invention is that the present solution clamps the gas cylinder on the frame through the clamping belt. No matter how the diameter of the gas cylinder changes, when the clamping belt clamps the gas cylinder, the clamping belt can fully adhere to the outer wall of the gas cylinder, increasing the contact area between the clamping belt and the gas cylinder, and can clamp the gas cylinder more stably in the transfer unit. In addition, the contact area between the clamping belt and the outer wall of the gas cylinder is large, and the extrusion force on the gas cylinder is evenly distributed, which is not easy to damage the gas cylinder.

[0016] The general clamping structure cannot adjust the position. When clamping a higher gas cylinder, the upper and lower sides of the gas cylinder cannot be clamped, which makes it easy to shake during filling and moving, affecting normal work.

[0017] This solution controls the front-to-back movement of the clamping mechanism to change the distance between the two clamping belts to adapt to gas cylinders of different heights. According to the height of the gas cylinder, the distance between the clamping belts is adjusted so that the clamping position of the clamping belt is always located near the upper and lower ends of the outer wall of the gas cylinder. This avoids the situation where only the middle of the gas cylinder can be clamped due to the height of the gas cylinder being too large, thereby causing the upper and lower ends of the gas cylinder to shake.

[0018] This solution provides an upper screw, a lower screw, a tightening turntable and a pulling turntable, so that when the upper screw and the lower screw cannot rotate, the rotation of the tightening turntable and the pulling turntable can drive the clamping mechanism to move forward and backward, thereby adjusting the distance between the two clamping belts; when the upper screw and the lower screw can rotate, the rotation of the tightening turntable and the pulling turntable can drive the clamping belt to move, changing the size of the tightening opening, so that the clamping belt clamps or loosens the gas cylinder.

[0019] This solution achieves this by coordinating the switching gear with the two connecting gears, so that when the motor gear rotates forward, the switching gear will drive one connecting gear to rotate, thereby causing the tightening turntable to rotate, shrinking the tightening opening, and facilitating the clamping belt to clamp the gas cylinder; when the motor gear rotates reversely, the switching gear cooperates with the other connecting gear, thereby driving the pulling turntable to rotate, expanding the tightening opening, and facilitating the gas cylinder to enter or leave the frame.

[0020] This solution enables the motor gear to slide axially so that when the motor gear is in the first position, it cooperates with the switching gear to drive a connecting gear to rotate; when the motor gear is in the second position, the motor gear meshes with the two synchronous gears at the same time, and then the two connecting gears rotate together.

[0021] This solution uses the gravity of the gas cylinder to drive the lower pressure block and the switching frame to move, so that the switching frame can not only control whether the upper screw and the lower screw can rotate, but also enable the motor gear to switch between the first position and the second position. No additional power element is required to drive the switching frame to move, saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the transfer unit of the present invention in the initial state;

[0024] Figure 3 It is a schematic diagram of the structure of the transfer unit of the present invention when clamping the gas cylinder;

[0025] Figure 4 It is a schematic diagram of the exploded structure of the clamping mechanism of the present invention;

[0026] Figure 5 It is a structural schematic diagram of the clamping mechanism of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the motor gear of the present invention when it is located at the first position;

[0028] Figure 7 It is a structural schematic diagram of the motor gear of the present invention when it is located at the second position;

[0029] Figure 8 It is a first exploded structural schematic diagram of the driving mechanism of the present invention;

[0030] Fig. 9 It is a second exploded structural schematic diagram of the driving mechanism of the present invention;

[0031] Fig.10 It is a schematic cross-sectional structural diagram of the driving mechanism of the present invention.

[0032] Description of the numbers in the figure:

[0033] 11. frame; 12. conveyor belt; 13. loading ramp; 14. transfer unit; 2. frame; 21. accommodating cavity; 211. through-hole; 22. installation cavity; 23. positioning roller; 3. clamping mechanism; 31. clamping belt; 311. tightening mouth; 32. tightening turntable; 321. tightening gear; 33. pulling frame; 331. rotating roller; 34. pulling turntable; 341. pulling gear; 342. pull rope; 41. upper screw; 411 , upper anti-rotation block; 42, upper gear roller; 43, lower screw; 431, lower anti-rotation block; 44, lower gear roller; 5, switching frame; 51, anti-rotation hole; 52, synchronous plug rod; 53, driving inclined plane; 6, lower pressure block; 61, extension rod; 7, driving mechanism; 71, positioning plate; 711, arc groove; 72, motor; 73, synchronous gear; 731, connecting gear; 74, motor gear; 741, synchronous slot; 75, switching gear. DETAILED DESCRIPTION

[0034] Specific embodiment 1: Please refer to Figure 1-Figure 10 A refrigerant storage and filling equipment comprises a frame 11, a conveyor belt 12 installed in the frame 11, and a filling mechanism installed in the frame 11; a transfer unit 14 is evenly installed on the conveyor belt 12; the transfer unit 14 comprises a frame 2, two groups of clamping mechanisms 3 symmetrically arranged in the frame 2 along the front-to-back direction; the frame 2 comprises a accommodating cavity 21 for placing a gas cylinder, and a mounting cavity 22 located below the accommodating cavity 21; the clamping mechanism 3 comprises a flexible clamping belt 31 and a tightening turntable 32 rotating in the mounting cavity 22; both ends of the clamping belt 31 are fixedly connected to the tightening turntable 32; when the clamping belt 31 is in a pending state, the clamping belt 31 is surrounded in a ring shape to form a tightening mouth 311 for accommodating a gas cylinder; when the tightening turntable 32 rotates forward, the clamping belt 31 is wound around the tightening turntable 32, and the tightening mouth 311 is reduced until the clamping belt 31 is tightly pressed against the surface of the gas cylinder, thereby fixing the gas cylinder.

[0035] The lower end of the accommodating chamber 21 is provided with two through-holes 211 ; the clamping belt 31 passes through the through-holes 211 ; the lower part of the accommodating chamber 21 is rotatably connected to two positioning rollers 23 ; the positioning roller 23 is located between the two through-holes 211 , and the gas cylinder is placed on the upper ends of the two positioning rollers 23 .

[0036] The clamping mechanism 3 also includes two groups of pulling components symmetrically distributed along the left and right directions; the pulling component includes a pulling frame 33, a rotating roller 331 rotatably connected to the pulling frame 33 and abutting against the inner circumference of the clamping belt 31, and a pulling turntable 34 rotatably connected to the accommodating cavity 21; a pull rope 342 is wound on the pulling turntable 34; one end of the pull rope 342 is fixedly connected to the pulling frame 33; when the pulling turntable 34 rotates in the opposite direction, the pull rope 342 is wound on the pulling turntable 34, and the pulling frame 33 moves toward the pulling turntable 34, and then the rotating roller 331 drives the clamping belt 31 to move toward the pulling turntable 34, and the tightening opening 311 expands. At this time, the tightening turntable 32 rotates in the opposite direction, and the clamping belt 31 gradually separates from the tightening turntable 32.

[0037] Upper screws 41 are respectively provided on the left and right sides of the upper part of the accommodating cavity 21; the upper screw 41 on the left is connected to the pulling turntable 34 on the left side of the two clamping mechanisms 3 through threaded transmission; the upper screw 41 on the right is connected to the pulling turntable 34 on the right side of the two clamping mechanisms 3 through threaded transmission; a lower screw 43 is rotatably connected in the installation cavity 22; the lower screw 43 is connected to the tightening turntable 32 in the two clamping mechanisms 3 through threaded transmission; a switching frame 5 capable of preventing the upper screw 41 and the lower screw 43 from rotating is slidably connected in the frame 2.

[0038] When the switching frame 5 prevents the upper screw rod 41 and the lower screw rod 43 from rotating, each tightening turntable 32 and the pulling turntable 34 rotate, and the clamping mechanism 3 will move along the front-back direction to change the position of the clamping belt 31.

[0039] When the switching frame 5 does not prevent the upper screw rod 41 and the lower screw rod 43 from rotating, the rotation of each tightening turntable 32 and the pulling turntable 34 will drive the corresponding lower screw rod 43 and the upper screw rod 41 to rotate synchronously, and the clamping mechanism 3 does not move forward and backward at this time.

[0040] The upper screw rod 41 is provided with two sections of upper threads with opposite rotation directions, and one upper thread cooperates with a pulling turntable 34; the lower screw rod 43 is provided with two sections of lower threads with opposite rotation directions, and one lower thread cooperates with a tightening turntable 32, so that the movement directions of the two clamping mechanisms 3 are opposite.

[0041] The tightening turntable 32 is coaxially provided with a tightening threaded hole that cooperates with the lower screw rod 43 ; the pulling turntable 34 is coaxially provided with a pulling threaded hole that threadably cooperates with the upper screw rod 41 .

[0042] The lower part of the accommodating chamber 21 is slidably connected with a lower pressing block 6; an extension rod 61 extending into the mounting chamber 22 is fixedly connected to the lower pressing block 6; a driving inclined surface 53 abutting against the extension rod 61 is provided on the switching frame 5; when the gas cylinder is placed in the accommodating chamber 21, the gas cylinder will abut against the lower pressing block 6, so that the lower pressing block 6 moves to the lower limit position, and the extension rod 61 cooperates with the driving inclined surface 53, so that the switching frame 5 moves to the point where it does not prevent the upper screw 41 and the lower screw 43 from rotating.

[0043] The outer wall of the upper screw rod 41 is provided with an upper stop block 411 with a non-circular cross-section; the outer wall of the lower screw rod 43 is provided with a lower stop block 431 with a non-circular cross-section; the switching frame 5 is provided with a stop hole 51 that can be plugged into the upper stop block 411 and the lower stop block 431 to prevent the upper screw rod 41 and the lower screw rod 43 from rotating.

[0044] A spring for returning is arranged between the switching frame 5 and the frame body 2 .

[0045] The installation cavity 22 is provided with a driving mechanism 7; the driving mechanism 7 comprises a positioning plate 71 fixed in the installation cavity 22, a motor 72 arranged on the positioning plate 71, and a motor gear 74 arranged on the output shaft of the motor 72; two connecting gears 731 are rotatably connected to the positioning plate 71; an arc groove 711 coaxial with the motor gear 74 is provided on the positioning plate 71; a switching gear 75 meshing with the motor gear 74 is slidably connected in the arc groove 711; a connecting gear 731 is connected to each tightening turntable 3 2 transmission connection; the other connecting gear 731 is transmission connected with each pulling turntable 34; when the motor gear 74 rotates forward, the motor gear 74 first drives the switching gear 75 to move to the forward limit position of the arc groove 711, the switching gear 75 meshes with one connecting gear 731, and then the switching gear 75 drives the connecting gear 731 to rotate; when the motor gear 74 rotates reversely, the motor gear 74 first drives the switching gear 75 to move to the reverse limit position of the arc groove 711, and the switching gear 75 meshes with another connecting gear 731.

[0046] A pulling gear 341 is coaxially arranged on the pulling turntable 34; two upper gear rollers 42 are rotatably connected in the accommodating cavity 21; the upper gear rollers 42 are meshed with the pulling gear 341; a tightening gear 321 is coaxially arranged on the tightening turntable 32; a lower gear roller 44 meshed with the tightening gear 321 is rotatably connected in the mounting cavity 22; one of the connecting gears 731 is connected to the upper gear roller 42 via a belt drive; the other connecting gear 731 is connected to the lower gear roller 44 via a belt drive.

[0047] When the clamping mechanism 3 moves forward and backward, the pulling gear 341 is always meshed with the upper gear roller 42, and the tightening gear 321 is always meshed with the lower gear roller 44; the two upper gear rollers 42 are connected by belt transmission.

[0048] One upper gear roller 42 meshes with the two pulling gears 341 on the left, and the other upper gear roller 42 meshes with the two pulling gears 341 on the right.

[0049] The motor gear 74 slides axially on the output shaft of the motor 72; each connecting gear 731 is coaxially provided with a synchronous gear 73; when the motor gear 74 is in the first position, the motor gear 74 is only engaged with the switching gear 75; when the motor gear 74 is in the second position, the motor gear 74 is only engaged with two synchronous gears 73.

[0050] The axial direction of the motor gear 74 is parallel to the sliding direction of the switching frame 5 ; a synchronous slot 741 is circumferentially provided on the motor gear 74 ; and a synchronous plug rod 52 plugged into the synchronous slot 741 is provided on the switching frame 5 .

[0051] When the switching frame 5 prevents the upper screw rod 41 and the lower screw rod 43 from rotating, the switching frame 5 drives the motor gear 74 to move to the second position; when the switching frame 5 does not prevent the upper screw rod 41 and the lower screw rod 43 from rotating, the switching frame 5 drives the motor gear 74 to move to the first position.

[0052] The frame 11 is provided with a loading inclined surface 13 ; the upper end of the loading inclined surface 13 is directly opposite to the accommodating cavity 21 .

[0053] In the initial state, no gas cylinder is placed in the frame 2, the lower pressing block 6 is at the upper limit position, the switching frame 5 prevents the upper screw 41 and the lower screw 43 from rotating, and the motor gear 74 is engaged with the two synchronous gears 73. The pulling frame 33 is close to the pulling turntable 34, and the tightening opening 311 formed by the clamping belt 31 is relatively large.

[0054] Before use, the position of the clamping mechanism 3 is adjusted according to the height of the gas cylinder. The motor 72 works and drives the motor gear 74 to rotate. The motor gear 74 drives the two synchronous gears 73 to rotate, and then the upper gear roller 42 and the lower gear roller 44 rotate. The upper gear roller 42 drives the pulling turntable 34 to rotate. Since the upper screw 41 cannot rotate at this time, the pulling turntable 34 rotates circumferentially and moves forward and backward at the same time. At the same time, the lower gear roller 44 drives the tightening turntable 32 to rotate. Since the lower screw 43 cannot rotate at this time, the tightening turntable 32 rotates circumferentially and moves forward and backward at the same time. Therefore, the two clamping mechanisms 3 are close to or away from each other. By controlling the motor 72 to rotate forward or reverse, the spacing between the two clamping mechanisms 3 is adjusted, and then the distance between the two clamping belts 31 is changed. Make the coverage of the two clamping belts 31 equivalent to the height of the gas cylinder, and then finally one clamping belt 31 is pressed against the upper part of the gas cylinder, and the other clamping belt 31 is pressed against the lower part of the gas cylinder.

[0055] After the spacing between the clamping belts 31 in each transfer unit 14 is adjusted, the conveyor belt 12 starts to work gradually, driving each transfer unit 14 to move along the conveyor belt 12 .

[0056] When adding a gas cylinder to the transfer unit 14 , first lay the gas cylinder down and push it along the loading slope 13 so that the gas cylinder passes through the loading slope 13 into the accommodating cavity 21 and is inserted into the tightening opening 311 . At this time, the gas cylinder is located on the two positioning rollers 23 .

[0057] At the same time, the gas cylinder will push the lower pressure block 6, so that the lower pressure block 6 moves to the lower limit position, and the extension rod 61 pushes the switching frame 5 to move, so that the switching frame 5 no longer prevents the upper screw 41 and the lower screw 43 from rotating. At the same time, the switching frame 5 drives the motor gear 74 to move to the first position, and the motor gear 74 engages with the switching gear 75.

[0058] Then the motor 72 drives the motor gear 74 to rotate forward, and the motor gear 74 first drives the switching gear 75 to move to the forward limit position of the arc groove 711, and the switching gear 75 engages with the connecting gear 731 at the forward limit position, and then the switching gear 75 drives the connecting gear 731 to rotate forward, and the connecting gear 731 is connected to the lower gear roller 44 for transmission, and then the tightening turntable 32 rotates forward, and at the same time, the lower screw 43 rotates synchronously with the tightening turntable 32.

[0059] As the tightening turntable 32 rotates forward, the clamping belt 31 is gradually wound around the tightening turntable 32, and the tightening opening 311 gradually shrinks. At the same time, the clamping belt 31 pulls the pulling frame 33, forcing the pulling frame 33 to move toward the gas cylinder, and the pull rope 342 gradually separates from the pulling turntable 34, forcing the pulling turntable 34 to rotate forward.

[0060] Finally, the clamping belt 31 abuts against the outer wall of the gas cylinder, fixing the gas cylinder on the frame 2. Then, as the conveyor belt 12 moves, the transfer unit 14 with the gas cylinder installed moves to the filling mechanism, and the filling mechanism works on the gas cylinder to inject liquefied hydrocarbon refrigerant into the gas cylinder.

[0061] As the conveyor belt 12 continues to work, the gas cylinder filled with hydrocarbon refrigerant moves to the unloading station, and it is necessary to manually take the gas cylinder out of the transfer unit 14. At this time, the motor 72 drives the motor gear 74 to rotate in the opposite direction. The motor gear 74 first drives the switching gear 75 to slide in the opposite direction along the arc groove 711, and finally the switching gear 75 moves to the reverse limit position in the arc groove 711, and the switching gear 75 meshes with the connecting gear 731 on the other side. After that, the motor 72 drives the connecting gear 731 to continue to rotate in the opposite direction. The connecting gear 731 is connected to the upper gear roller 42 by transmission, and then each pulling turntable 34 rotates in the opposite direction, the pull rope 342 is gradually wound on the pulling turntable 34, and the pulling frame 33 moves in the direction of the pulling turntable 34. At the same time, the pulling frame 33 pulls the clamping belt 31, so that the clamping belt 31 is separated from the gas cylinder, and the tightening port 311 gradually expands. The clamping belt 31 gradually detaches from the tightening turntable 32, thereby forcing the tightening turntable 32 to rotate in the opposite direction.

[0062] Finally, the tightening opening 311 is expanded to a larger state, and the worker can conveniently take the gas cylinder out of the transfer unit 14 .

[0063] The above process is repeated to place the gas cylinders one by one into the transfer unit 14 and to fill the gas cylinders.

Claims

1. A refrigerant storage and filling device, characterized in that: The invention comprises a frame (11), a conveyor belt (12) installed in the frame (11), and a filling mechanism installed in the frame (11); the conveyor belt (12) is evenly installed with a transfer unit (14); the transfer unit (14) comprises a frame (2), and two groups of clamping mechanisms (3) symmetrically arranged in the frame (2) along the front-back direction; the frame (2) comprises a receiving cavity (21) for placing a gas cylinder, and a mounting cavity (22) located below the receiving cavity (21); the clamping mechanism (3) comprises a plurality of clamping mechanisms (3) arranged in a plurality of positions; The invention comprises a flexible clamping belt (31) and a tightening turntable (32) which rotates in the installation cavity (22); two ends of the clamping belt (31) are fixedly connected to the tightening turntable (32); when the clamping belt (31) is in a pending state, the clamping belt (31) is surrounded in a ring shape to form a tightening opening (311) for accommodating a gas cylinder; when the tightening turntable (32) rotates in a forward direction, the clamping belt (31) is wound around the tightening turntable (32), and the tightening opening (311) is reduced until the clamping belt (31) is tightly pressed against the surface of the gas cylinder.

2. A refrigerant storage and filling device according to claim 1, characterized in that: The clamping mechanism (3) further comprises two groups of pulling components symmetrically distributed along the left-right direction; the pulling components comprise a pulling frame (33), a rotating roller (331) rotatably connected to the pulling frame (33) and abutting against the inner circumference of the clamping belt (31), and a pulling turntable (34) rotatably connected to the pulling frame (33) in the accommodating cavity (21); a pulling rope (342) is wound around the pulling turntable (34); one end of the pulling rope (342) is fixedly connected to the pulling frame (33); when the pulling turntable (34) rotates in the opposite direction, the pulling rope (342) is wound around the pulling turntable (34), and the rotating roller (331) drives the clamping belt (31) to move in the direction of the pulling turntable (34), thereby expanding the tightening opening (311).

3. A refrigerant storage and filling device according to claim 2, characterized in that: Upper screw rods (41) are respectively arranged on the left and right sides of the upper part of the accommodating cavity (21); the upper screw rod (41) on the left side is connected to the pulling turntable (34) on the left side of the two clamping mechanisms (3) through threaded transmission; the upper screw rod (41) on the right side is connected to the pulling turntable (34) on the right side of the two clamping mechanisms (3) through threaded transmission; a lower screw rod (43) is rotatably connected in the installation cavity (22); the lower screw rod (43) is connected to the tightening turntable (32) in the two clamping mechanisms (3) through threaded transmission; and a switching frame (5) capable of preventing the upper screw rod (41) and the lower screw rod (43) from rotating is slidably connected in the frame (2).

4. A refrigerant storage and filling device according to claim 3, characterized in that: The upper screw rod (41) is provided with two sections of upper threads with opposite rotation directions, one of which cooperates with a pulling turntable (34); the lower screw rod (43) is provided with two sections of lower threads with opposite rotation directions, one of which cooperates with a tightening turntable (32), so that the movement directions of the two clamping mechanisms (3) are opposite.

5. The refrigerant storage and filling equipment according to claim 3 is characterized in that: A lower pressing block (6) is slidably connected to the lower portion of the accommodating chamber (21); an extension rod (61) extending into the mounting chamber (22) is fixedly connected to the lower pressing block (6); a driving inclined surface (53) abutting against the extension rod (61) is provided on the switching frame (5); when the gas cylinder is placed in the accommodating chamber (21), the gas cylinder will abut against the lower pressing block (6), so that the lower pressing block (6) moves to a lower limit position.

6. A refrigerant storage and filling device according to claim 3, characterized in that: A driving mechanism (7) is arranged in the installation cavity (22); the driving mechanism (7) comprises a positioning plate (71) fixed in the installation cavity (22), a motor (72) arranged on the positioning plate (71), and a motor gear (74) arranged on an output shaft of the motor (72); two connecting gears (731) are rotatably connected to the positioning plate (71); an arc groove (711) coaxial with the motor gear (74) is arranged on the positioning plate (71); a switching gear (75) meshing with the motor gear (74) is slidably connected in the arc groove (711); one connecting gear (731) is drivingly connected to each tightening turntable (32); and another connecting gear (731) is drivingly connected to each pulling turntable (34).

7. A refrigerant storage and filling device according to claim 6, characterized in that: A pulling gear (341) is coaxially arranged on the pulling turntable (34); two upper gear rollers (42) are rotatably connected in the accommodating cavity (21); the upper gear rollers (42) mesh with the pulling gear (341); a tightening gear (321) is coaxially arranged on the tightening turntable (32); a lower gear roller (44) meshing with the tightening gear (321) is rotatably connected in the mounting cavity (22); one of the connecting gears (731) is connected to the upper gear roller (42) via a belt drive; and the other of the connecting gears (731) is connected to the lower gear roller (44) via a belt drive.

8. The refrigerant storage and filling equipment according to claim 6, characterized in that: The motor gear (74) slides axially on the output shaft of the motor (72); each of the connecting gears (731) is coaxially provided with a synchronous gear (73); when the motor gear (74) is located in a first position, the motor gear (74) is only meshed with the switching gear (75); when the motor gear (74) is located in a second position, the motor gear (74) is only meshed with the two synchronous gears (73).

9. A refrigerant storage and filling device according to claim 8, characterized in that: The axial direction of the motor gear (74) is parallel to the sliding direction of the switching frame (5); a synchronization slot (741) is provided on the motor gear (74) along the circumferential direction; and a synchronization plug rod (52) is provided on the switching frame (5) and is plugged into the synchronization slot (741).

10. The refrigerant storage and filling equipment according to claim 1, characterized in that: The frame (11) is provided with a loading inclined surface (13); the upper end of the loading inclined surface (13) is directly opposite to the accommodating cavity (21).

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