Refrigerant storage and filling equipment

Abstract

The present invention discloses a refrigerant storage and filling device, which belongs to the field of gas cylinder filling. The refrigerant storage and filling device 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 receiving cavity for placing the gas cylinder and a mounting cavity located below the receiving cavity; the clamping mechanism comprises a flexible clamping belt and a tightening turntable rotating in the mounting cavity; both 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; 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.

Description

Technical Field

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

[0002] Before adding liquefied hydrocarbon refrigerant to a gas cylinder, it needs to be secured. Currently, the most commonly used clamping station is a curved fixture with the same diameter as the cylinder, which fits perfectly against the cylinder surface and holds it firmly in place.

[0003] However, different gas cylinders have varying diameters and heights. Using the same clamp to hold cylinders of varying diameters creates a gap between the clamp and the cylinder, resulting in a small contact area and unstable clamping. This small contact area also creates excessive pressure on the cylinder's outer wall, which can damage the cylinder's surface and cause dents. 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-to-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; both 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 wrapped in a ring to form a tightening opening for accommodating the gas cylinder; when the tightening turntable rotates forward, the clamping belt is wound around the tightening turntable, and the tightening opening shrinks 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 provided 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 turntable in the two clamping mechanisms through threaded transmission; a switching frame is slidably connected in the frame, which can prevent the upper screw and the lower screw from rotating.

[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 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 limit 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-shaped groove coaxial with the motor gear is provided on the positioning plate; a switching gear meshing with the motor gear is slidably connected in the arc-shaped 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 engaged with the pulling gear; a tightening gear is coaxially arranged on the tightening turntable; a lower gear roller is rotatably connected in the mounting cavity and is engaged with the tightening gear; 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 provided on the motor gear along the circumference; and a synchronization rod is provided on the switching frame to be plugged into the synchronization slot.

[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 to existing technologies, the present invention offers the following advantages: This solution utilizes a clamping band to secure the gas cylinder to the frame. Regardless of the cylinder's diameter, the clamping band maintains full contact with the cylinder's outer wall, increasing the contact area between the clamping band and the cylinder, ensuring a more stable clamping of the cylinder within the transfer unit. Furthermore, the larger contact area between the clamping band and the cylinder's outer wall evenly distributes the compressive force applied to the cylinder, minimizing damage to the 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 adapts to cylinders of varying heights by controlling the forward and backward movement of the clamping mechanism, varying the spacing between the two clamping bands. The spacing between the clamping bands is adjusted according to the cylinder's height, ensuring that the clamping bands always clamp onto the cylinder's outer wall near the top and bottom ends. This prevents the situation where the clamping mechanism only clamps the cylinder in the middle, potentially causing the cylinder to wobble.

[0018] This solution is provided with 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 back and forth, and adjust 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, change the size of the tightening opening, and make the clamping belt clamp or loosen the gas cylinder.

[0019] This solution cooperates with the switching gear and the two connecting gears so that when the motor gear rotates forward, the switching gear will drive one connecting gear to rotate, thereby rotating the tightening turntable and shrinking the tightening opening, making it easier for the clamping belt to clamp the gas cylinder; when the motor gear rotates reversely, the switching gear cooperates with the other connecting gear to drive the pulling turntable to rotate, and the tightening opening expands, making it easier for 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 engages 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 switch the motor gear 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 This is a schematic structural diagram of the transfer unit of the present invention in its initial state;

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

[0025] Figure 4 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 This is a structural schematic diagram of the motor gear of the present invention when it is in the first position;

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

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

[0030] Figure 9 is a second exploded structural diagram of the driving mechanism of the present invention;

[0031] Figure 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 chamber; 211. Through-hole; 22. Mounting chamber; 23. Positioning roller; 3. Clamping mechanism; 31. Clamping belt; 311. Tightening opening; 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 Figures 1-10 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 and rear directions; the frame 2 comprises a accommodating cavity 21 for placing a gas cylinder and an installation 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 installation 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 to form a tightening mouth 311 for accommodating the 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 shrinks 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 around 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 around 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 chamber 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 chamber 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 that can prevent 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 41 and the lower screw 43 from rotating, the tightening turntable 32 and the pulling turntable 34 rotate, and the clamping mechanism 3 moves 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 41 and the lower screw 43 from rotating, the rotation of each tightening turntable 32 and the pulling turntable 34 will drive the corresponding lower screw 43 and the upper screw 41 to rotate synchronously, and the clamping mechanism 3 does not move forward or backward.

[0040] The upper screw rod 41 is provided with two 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 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 to 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 that abuts 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, causing the lower pressing block 6 to move 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 a 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 resetting is provided 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 includes a positioning plate 71 fixed in the installation cavity 22, a motor 72 provided on the positioning plate 71, and a motor gear 74 provided on the output shaft of the motor 72; two connecting gears 731 are rotatably connected to the positioning plate 71; an arcuate 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 arcuate 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 engages 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 engages with the other connecting gear 731.

[0046] A pulling gear 341 is coaxially provided on the pulling turntable 34; two upper gear rollers 42 are rotatably connected in the accommodating cavity 21; the upper gear roller 42 is engaged with the pulling gear 341; a tightening gear 321 is coaxially provided on the tightening turntable 32; a lower gear roller 44 engaged 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 through a belt drive; the other connecting gear 731 is connected to the lower gear roller 44 through a belt drive.

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

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

[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 the 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 synchronization slot 741 is circumferentially provided on the motor gear 74 ; and a synchronization rod 52 is provided on the switching frame 5 to be plugged into the synchronization slot 741 .

[0051] When the switching frame 5 prevents the upper screw 41 and the lower screw 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 41 and the lower screw 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 slope 13 ; the upper end of the loading slope 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 now larger.

[0054] Before use, adjust the position of the clamping mechanism 3 according to the height of the gas cylinder. The motor 72 operates, driving the motor gear 74 to rotate. The motor gear 74 drives the two synchronous gears 73 to rotate, which in turn drives the upper gear roller 42 and the lower gear roller 44 to 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 back and forth. Simultaneously, 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 back and forth. As a result, the two clamping mechanisms 3 move closer to or further away from each other. By controlling the forward or reverse rotation of the motor 72, the spacing between the two clamping mechanisms 3 is adjusted, thereby changing the distance between the two clamping bands 31. This ensures that the coverage area of ​​the two clamping bands 31 is commensurate with the height of the gas cylinder, ultimately resulting in one clamping band 31 abutting the upper portion of the gas cylinder and the other clamping band 31 abutting the lower portion 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, causing the lower pressure block 6 to move to the lower limit position, and the extension rod 61 will push 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 contacts 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, which works on the gas cylinder and injects liquefied hydrocarbon refrigerant into the gas cylinder.

[0061] As the conveyor belt 12 continues to operate, the cylinders filled with hydrocarbon refrigerant move to the unloading station, where they must be manually removed from the transfer unit 14. At this point, the motor 72 drives the motor gear 74 to rotate in the reverse direction. The motor gear 74 first drives the switching gear 75 to slide in the reverse direction along the arcuate groove 711. Eventually, the switching gear 75 moves to its reverse limit position within the arcuate groove 711, where it engages with the connecting gear 731 on the other side. The motor 72 then drives the connecting gear 731 to continue rotating in the reverse direction. The connecting gear 731 is in transmission connection with the upper gear roller 42, causing the pull discs 34 to rotate in the reverse direction. The pull rope 342 gradually winds around the pull discs 34, causing the pull frame 33 to move toward the pull discs 34. Simultaneously, the pull frame 33 pulls the clamping belt 31, separating it from the cylinder and gradually widening the tightening opening 311. The clamping belt 31 gradually disengages from the tightening disc 32, forcing the tightening disc 32 to rotate in the reverse 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 into the transfer unit 14 one by one and to perform filling operation on the gas cylinders.

Claims

1. A refrigerant storage and filling device, characterized by: The invention 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-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 plurality of clamping mechanisms (3) are ... The invention comprises a flexible clamping belt (31) and a tightening turntable (32) rotating in the installation 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 annularly wound to form a tightening opening (311) for accommodating the 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; The clamping mechanism (3) further comprises two groups of pulling components symmetrically distributed along the left-right direction; the pulling component comprises a pulling frame (33), a rotating roller (331) rotatably connected to the pulling frame (33) and abutting against the inner periphery of the clamping belt (31), and a pulling turntable (34) rotatably connected to the pulling turntable (34) 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 toward the pulling turntable (34), and the tightening opening (311) is expanded; A switching frame (5) is slidably connected in the frame (2) and is capable of preventing the upper screw (41) and the lower screw (43) from rotating. The lower portion of the accommodating chamber (21) is slidably connected to 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 abuts against the lower pressing block (6), causing the lower pressing block (6) to move to a lower limit position; A driving mechanism (7) is provided in the installation cavity (22); the driving mechanism (7) comprises a positioning plate (71) fixed in the installation cavity (22), a motor (72) provided on the positioning plate (71), and a motor gear (74) provided on an output shaft of the motor (72); two connecting gears (731) are rotatably connected to the positioning plate (71); an arcuate 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 arcuate groove (711); one connecting gear (731) is transmission-connected to each tightening turntable (32); and another connecting gear (731) is transmission-connected to each pulling turntable (34); 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).

2. The refrigerant storage and filling equipment according to claim 1, characterized in that: Upper screw rods (41) are respectively provided on the left and right sides of the upper portion 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 a 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 a 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 a threaded transmission.

3. The refrigerant storage and filling equipment according to claim 2, characterized in that: The upper screw (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 (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.

4. The refrigerant storage and filling equipment according to claim 1, characterized in that: One of the connecting gears (731) is connected to the upper gear roller (42) via a belt transmission; the other connecting gear (731) is connected to the lower gear roller (44) via a belt transmission.

5. The refrigerant storage and filling equipment according to claim 1, 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 in a first position, the motor gear (74) is only engaged with the switching gear (75); when the motor gear (74) is in a second position, the motor gear (74) is only engaged with the two synchronous gears (73).

6. The refrigerant storage and filling equipment according to claim 5, 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 circumference; and a synchronization rod (52) is provided on the switching frame (5) and is plugged into the synchronization slot (741).

7. The refrigerant storage and filling equipment according to claim 1, characterized in that: A loading slope (13) is provided on the frame (11); the upper end of the loading slope (13) is directly opposite to the accommodating cavity (21).

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