An explosion-proof liquefied gas cylinder and its manufacturing method

Abstract

The present invention discloses a technology related to liquefied gas cylinders, specifically an explosion-proof liquefied gas cylinder and its manufacturing method. It includes a liquefied gas cylinder. A fixing ring is fixedly installed above the liquefied gas cylinder. A valve rod is installed in the middle of the fixing ring. A handwheel is fixedly connected to the top of the valve rod. A connecting shell is fixedly installed on the surface of the fixing ring. A gear is rotatably connected to the connecting shell. A first threaded pipe is installed at the front end of the connecting shell. A first nut is threadedly connected to the outside of the first threaded pipe. A damping pad is rotatably installed at the front end of the first nut. A traction steel rope is fixedly connected to the surface of the damping pad. The end of the traction steel rope is connected to the gear. A rack is meshed and connected to the rear side of the gear. A slide plate is fixedly connected to the rear side of the rack. A shape memory alloy spring is fixedly connected to the side of the slide plate. The end of the shape memory alloy spring is fixedly connected to a fixing plate. This gas supplementing cylinder not only has an explosion-proof function but also can keep the valve in a closed state before the gas pipe is connected.

Description

Technical Field

[0001] The present invention relates to the technical field of liquefied gas cylinders, and particularly to an explosion-proof liquefied gas cylinder and a manufacturing method thereof. Background Art

[0002] A liquefied gas cylinder, also known as a gas cylinder, is a device for storing liquefied natural gas. To ensure the overall strength, it is made of steel with a relatively thick inner wall. The whole is composed of a cylinder body and a valve at the top of the cylinder. There are still some defects in the existing liquefied gas cylinders during use.

[0003] For example, a Chinese invention patent (publication number CN110360442B) discloses a liquefied gas cylinder. The heat preservation ring made of heat preservation material can reduce the heat loss of the cylinder body during transportation. At the same time, when the temperature is lower than seven degrees Celsius, the dimethylamine in the rodless cavity of the first cylinder liquefies and its volume decreases sharply. The external atmospheric pressure pushes the first piston rod to slide, drives the connecting rod and the spike to move, and pierces the heating bag. The iron powder in the heating bag is oxidized by the oxygen and water vapor in the air. When oxidized, the iron powder releases heat, heats the cylinder body and then keeps it warm, increasing the utilization efficiency of the liquefied gas in the cylinder body; when the outdoor temperature drops, the first piston rod slides towards the bottom of the first cylinder, the first piston rod tightens the steel rope, and then the steel rope pulls the anti-collision ring to sleeve the shoulders at the upper and lower ends of the cylinder body, preventing the anti-collision ring from loosening, reducing the rigid collision of the cylinder body during transportation and movement, and reducing the damage of the cylinder body, further ensuring the transportation and use safety of the liquefied gas cylinder. Although the above liquefied gas cylinder can achieve the function of preventing the anti-collision ring from falling off during use, in actual use, it cannot automatically close the valve in a high-temperature environment, does not have a high-temperature cut-off function, and is prone to danger; and when the existing liquefied gas cylinder is in use, it cannot close the valve cut-off function after being connected to the liquefied gas stove pipeline, and does not have a safety protection function. Summary of the Invention

[0004] In view of the problems existing in the existing liquefied gas cylinders, the present invention is proposed.

[0005] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solution: An explosion-proof liquefied gas cylinder, including a liquefied gas cylinder, a fixing ring is fixedly installed above the liquefied gas cylinder, a valve rod is installed in the middle of the fixing ring, the top of the valve rod is fixedly connected with a handwheel, a connecting shell is fixedly installed on the surface of the fixing ring, a gear is rotatably connected to the connecting shell, a first threaded pipe is installed at the front end of the connecting shell, a first nut is threadedly connected to the outside of the first threaded pipe, a damping pad is rotatably installed at the front end of the first nut, a traction steel rope is fixedly connected to the surface of the damping pad, the end of the traction steel rope is connected to the gear, a rack is meshed with the rear side of the gear, a slide plate is fixedly connected to the rear side of the rack, a shape memory alloy spring is fixedly connected to the side of the slide plate, the end of the shape memory alloy spring is fixedly connected to a fixing plate, and the fixing plate and the fixing ring are fixedly connected. A scroll spring is sleeved outside the lower half of the connecting shell, a first stop block is slidably connected to the inner wall of the connecting shell, a second stop block is fixedly connected to the side of the valve rod, and the head and tail ends of the scroll spring are respectively connected to the first stop block and the gear.

[0006] As a preferred solution of the explosion-proof liquefied gas cylinder according to the present invention, wherein: a base is fixedly installed at the bottom of the liquefied gas cylinder, a first connecting sleeve is fixedly connected to the outside of the base, a support plate is fixedly connected between the first connecting sleeve and the liquefied gas cylinder, and a second connecting sleeve is fixedly connected to the outside of the upper half of the liquefied gas cylinder.

[0007] As a preferred solution of the explosion-proof liquefied gas cylinder according to the present invention, wherein: the outer diameters of the first connecting sleeve and the second connecting sleeve are the same, the materials of the first connecting sleeve and the second connecting sleeve are both rubber, and the support plates are evenly distributed at equal angles between the liquefied gas cylinder and the first connecting sleeve.

[0008] As a preferred solution of the explosion-proof liquefied gas cylinder according to the present invention, wherein: the central axes of the connecting shell and the gear are collinear, the gear forms a first elastic structure with the connecting shell and the first stop block through the scroll spring, and the position of the first stop block corresponds to the position of the second stop block.

[0009] As a preferred solution of the explosion-proof liquefied gas cylinder according to the present invention, wherein: several groups of the fixing plate, the slide plate and the shape memory alloy spring are evenly distributed at equal intervals on the rear side of the rack, the slide plate and the rack form a second elastic structure with the fixing ring and the fixing plate through the shape memory alloy spring, the connection mode between the rack and the fixing ring is a sliding connection, and the gear forms a first rotating structure with the connecting shell through the shape memory alloy spring and the rack.

[0010] As a preferred embodiment of the explosion-proof liquefied gas cylinder of the present invention, wherein: a second threaded pipe is provided at the front end of the first threaded pipe, a second nut is threadedly installed on the outer side of the second threaded pipe, a limiting block is slidably installed inside the second nut, and a connecting block is fixedly connected to the surface of the limiting block.

[0011] As a preferred embodiment of the explosion-proof liquefied gas cylinder of the present invention, wherein: a sliding ring is slidably installed on the outer side of the second threaded pipe, a pulling rope is bolted to the surface of the sliding ring, the end of the pulling rope is connected to the connecting block, and a gas pipe is fixedly connected to the end of the second threaded pipe.

[0012] As a preferred embodiment of the explosion-proof liquefied gas cylinder of the present invention, wherein: a second magnetic block is fixedly arranged on the surface of the connecting block, a first magnetic block is fixedly connected to the surface of the first nut, the number and position of the first magnetic blocks correspond to the number and position of the second magnetic blocks one by one, and the second magnetic block forms a sliding structure between the limiting block and the second nut.

[0013] As a preferred embodiment of the explosion-proof liquefied gas cylinder of the present invention, wherein: a convex block is fixedly connected to the outer side of the gas pipe, galvanized steel wires are fixedly arranged inside the convex block and the gas pipe, and the galvanized steel wires and the convex block are evenly distributed at equal angles on the outer side of the gas pipe.

[0014] A manufacturing method of an explosion-proof liquefied gas cylinder includes the following steps:

[0015] S1: By welding a base and a support plate at the bottom of the liquefied gas cylinder, and then sleeving the first connecting sleeve and the second connecting sleeve on the outer sides of the base and the liquefied gas cylinder respectively;

[0016] S2: By installing a gas valve at the top of the liquefied gas cylinder, fixedly installing a connecting shell on the outer side of the valve stem, rotatably installing a gear below the connecting shell, communicating and installing a first threaded pipe at the front end of the connecting shell, threadedly installing a first nut on the outer side of the first threaded pipe, and bolting a traction steel rope between the gear and the first nut;

[0017] S3: Slidingly installing a first stop block inside the connecting shell, fixedly installing a second stop block on the side of the valve stem, and installing a scroll spring between the gear and the first stop block;

[0018] S4: Installing a rack at the rear side of the gear, and then installing four groups of fixing plates, sliding plates and shape memory alloy springs at the rear side of the rack, arranging the fixing plates equidistantly on the surface of the fixing ring, arranging the sliding plates equidistantly on the surface of the rack, and connecting the shape memory alloy springs between the fixing plates and the sliding plates;

[0019] S5: Install a second threaded pipe and a gas pipe for docking with the first threaded pipe at the front end of the first threaded pipe, set bumps on the surface of the gas pipe, and install galvanized steel wires between the bumps and the gas pipe. Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. By setting the first nut and the traction steel rope, when the first nut is not docked with the second nut, the traction steel rope on the first nut is always in a relaxed state. At this time, the scroll spring is not stretched, and the first stop block and the second stop block are in contact with each other. At this time, the shape memory alloy spring supports the slide plate and the rack, and the rack acts on the gear to keep the position of the gear unchanged. Therefore, the first stop block and the second stop block always remain in a state of mutual contact. After the first threaded pipe and the second threaded pipe on the device are docked, the traction steel rope pulls the first stop block away from the second stop block, so that the valve can be opened. At the same time, before docking, the air valve is in a closed state, and after docking, the air valve is in an openable state.

[0021] 2. By the shape memory alloy spring on the device, when the ambient temperature rises, the shape memory alloy spring can automatically elongate, and then the gear rotates clockwise. At this time, the first stop block and the second stop block are in contact with each other again, and the valve stem rotates clockwise after being pushed, thereby realizing the function of automatically closing the valve when the temperature rises, solving the defect that the existing liquefied gas cylinder cannot automatically close the air valve when the temperature rises. The device has the advantage of stronger stability.

[0022] 3. By setting the first nut and the second nut, as well as the first magnetic block and the second magnetic block, when the first threaded pipe and the second threaded pipe on the device are docked, after the magnetic blocks on the first nut and the second nut are adsorbed to each other, the first nut and the second nut can no longer rotate independently. Furthermore, the device can remain stable after docking. Finally, through the damping pad, the nut can remain stable after being rotated and adjusted to a certain position and will not shift.

[0023] 4. Through the first connecting sleeve and the second connecting sleeve, when the steel cylinder is tilted, the first connecting sleeve and the second connecting sleeve made of rubber can support the steel cylinder body, realizing the protection function, solving the defect that the existing steel cylinder does not have a protection function when tilted. The device can reduce the impact generated when hitting the ground during tilting, improve the safety of the device during use, and realize the explosion-proof function;

[0024] 5. By setting the galvanized steel wires, the gas pipe on the device has a certain strength. Utilizing the anti-bending performance and toughness of the galvanized steel wires, the gas pipe will not be bent at a large angle, preventing blockage when the device transports gas, and improving the safety of the device during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below in conjunction with the drawings and specific embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0026] Figure 1 is a schematic diagram of the overall structure of an explosion-proof liquefied gas cylinder of the present invention;

[0027] Figure 2 is Figure 1 a schematic diagram of the structure at position A in

[0028] Figure 3 is Figure 1 a schematic diagram of the structure at position B in

[0029] Figure 4 is a schematic diagram of the connection structure between the first screw rod and the first magnetic block of the present invention;

[0030] Figure 5 is a schematic diagram of the connection structure between the convex block and the galvanized steel wire of the present invention;

[0031] Figure 6 is a schematic diagram of the front sectional view of the valve rod of the present invention;

[0032] Figure 7 is Figure 6 a schematic diagram of the structure at position C in

[0033] Figure 8 is a schematic diagram of the connection structure between the scroll spring and the first stop block of the present invention.

[0034] Reference numerals in the figure: 1. Liquefied gas cylinder; 2. Base; 3. First connecting sleeve; 4. Support plate; 5. Second connecting sleeve; 6. Valve rod; 7. Handwheel; 8. Connection shell; 9. Gear; 10. Fixed ring; 11. Fixed plate; 12. Slide plate; 13. Memory alloy spring; 14. Rack; 15. First threaded pipe; 16. First nut; 17. First magnetic block; 18. Traction steel rope; 19. Second threaded pipe; 20. Slip ring; 21. Pulling rope; 22. Second nut; 23. Connection block; 24. Limit block; 25. Second magnetic block; 26. Gas pipe; 27. Convex block; 28. Galvanized steel wire; 29. Damping pad; 30. Scroll spring; 31. First stop block; 32. Second stop block. Specific Embodiments

[0035] To make the above objects, features, and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below in conjunction with the drawings.

[0036] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention may be practiced in other ways than those specifically described herein, and those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0037] Secondly, the present invention will be described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of illustration, the cross-sectional views showing the device structure will be enlarged locally out of proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0038] Embodiment

[0039] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0040] As Figures 1 - 8 shown, an explosion-proof liquefied gas cylinder and a manufacturing method thereof include a liquefied gas cylinder 1. A fixing ring 10 is fixedly installed above the liquefied gas cylinder 1. A valve rod 6 is installed in the middle of the fixing ring 10. A handwheel 7 is fixedly connected to the top of the valve rod 6. A connecting shell 8 is fixedly installed on the surface of the fixing ring 10. A gear 9 is rotatably connected to the connecting shell 8. A first threaded pipe 15 is installed at the front end of the connecting shell 8. A first nut 16 is threadedly connected to the outside of the first threaded pipe 15. A damping pad 29 is rotatably installed at the front end of the first nut 16. A traction steel rope 18 is fixedly connected to the surface of the damping pad 29. The end of the traction steel rope 18 is connected to the gear 9. A rack 14 is meshed and connected to the rear side of the gear 9. A slide plate 12 is fixedly connected to the rear side of the rack 14. A shape memory alloy spring 13 is fixedly connected to the side of the slide plate 12. The shape memory alloy spring 13 can elongate when the temperature rises, thereby automatically driving the rack 14 to move. The end of the shape memory alloy spring 13 is fixedly connected to a fixing plate 11. The fixing plate 11 and the fixing ring 10 are fixedly connected. A scroll spring 30 is sleeved on the outside of the lower half of the connecting shell 8. A first stop block 31 is slidably connected to the inner wall of the connecting shell 8. A second stop block 32 is fixedly connected to the side of the valve rod 6. The head and tail ends of the scroll spring 30 are respectively connected to the first stop block 31 and the gear 9. By screwing out the first nut 16, the traction steel rope 18 in the device acts on the gear 9, so that the first stop block 31 and the second stop block 32 no longer abut against each other. At this time, the function of opening the gas valve can be realized by rotating the handwheel 7 counterclockwise, so that the device can automatically open the gas valve after docking with the first threaded pipe 15 and automatically close the gas valve when not docked, so that the gas valve of the device remains tightly closed when not in use. The shape memory alloy spring 13 can act on the gear 9 when the temperature rises, so that the device can automatically close the gas valve when the temperature rises, improving the safety during use.

[0041] In this example, a base 2 is fixedly installed at the bottom of the liquefied gas cylinder 1. A first connecting sleeve 3 is fixedly connected to the outside of the base 2. A support plate 4 is fixedly connected between the first connecting sleeve 3 and the liquefied gas cylinder 1. A second connecting sleeve 5 is fixedly connected to the outside of the upper half of the liquefied gas cylinder 1. The second connecting sleeve 5 and the first connecting sleeve 3 can play a protective role when the liquefied gas cylinder 1 falls down.

[0042] In this example, the outer diameters of the first connecting sleeve 3 and the second connecting sleeve 5 are the same. The materials of the first connecting sleeve 3 and the second connecting sleeve 5 are both rubber. The support plates 4 are evenly distributed at equal angles between the liquefied gas cylinder 1 and the first connecting sleeve 3. The support plates 4 evenly distributed at equal angles enable the second connecting sleeve 5 to stably support the liquefied gas cylinder 1. The first connecting sleeve 3 and the second connecting sleeve 5 made of rubber can improve the overall buffering effect of the device.

[0043] In this example, the central axes of the connecting shell 8 and the gear 9 are collinear. The gear 9 and the connecting shell 8 and the first stop block 31 form a first elastic structure through a scroll spring 30. The position of the first stop block 31 corresponds to the position of the second stop block 32. Through the first elastic structure on the device, the first stop block 31 on the scroll spring 30 can abut against the second stop block 32, thereby restricting the opening of the air valve and realizing the closing function, so as to enable or disable the function of the air valve subsequently.

[0044] In this example, a plurality of groups of fixing plates 11, sliding plates 12 and shape memory alloy springs 13 are evenly distributed at equal intervals on the rear side of the rack 14. The sliding plate 12 and the rack 14 and the fixing ring 10 and the fixing plate 11 form a second elastic structure through the shape memory alloy spring 13. The connection mode between the rack 14 and the fixing ring 10 is a sliding connection. The gear 9 and the rack 14 and the connecting shell 8 form a first rotating structure through the shape memory alloy spring 13. Through the second elastic structure and the first rotating structure on the device, when the ambient temperature around the device rises, the shape memory alloy spring 13 elongates, so that the rack 14 moves to the right, causing the gear 9 to rotate clockwise, and then automatically closing the air valve.

[0045] In this example, a second threaded pipe 19 is provided at the front end of the first threaded pipe 15. A second nut 22 is threadedly installed on the outside of the second threaded pipe 19. A limiting block 24 is slidably installed inside the second nut 22. A connecting block 23 is fixedly connected to the surface of the limiting block 24. Through the connecting block 23 on the device, the device can move the limiting block 24 straight forward and backward, so as to dock the nuts on the front and rear sides subsequently, improving the stability of the device during operation.

[0046] In this example, a sliding ring 20 is slidably mounted on the outer side of the second threaded pipe 19. A pulling rope 21 is bolted to the surface of the sliding ring 20. The end of the pulling rope 21 is connected to the connecting block 23. The end of the second threaded pipe 19 is fixedly connected to a gas pipe 26. When the sliding ring 20 moves through the pulling rope 21 on the device, the connecting blocks 23 at various positions can move synchronously, eliminating the need to adjust each connecting block 23 individually and improving the convenience during use.

[0047] In this example, a second magnetic block 25 is fixedly arranged on the surface of the connecting block 23, and a first magnetic block 17 is fixedly connected to the surface of the first nut 16. The number and position of the first magnetic blocks 17 correspond one by one to the number and position of the second magnetic blocks 25. The second magnetic block 25 forms a sliding structure with the second nut 22 through a limiting block 24. The second magnetic block 25 and the first magnetic block 17 can adsorb each other, enabling the first nut 16 and the second nut 22 to complete docking. After the device docks the threaded pipes on both sides, the second nut 22 and the first nut 16 will not rotate independently of each other.

[0048] In this example, a convex block 27 is fixedly connected to the outer side of the gas pipe 26, and galvanized steel wires 28 are fixedly arranged inside both the convex block 27 and the gas pipe 26. The galvanized steel wires 28 and the convex block 27 are evenly distributed at equal angles on the outer side of the gas pipe 26.

[0049] A manufacturing method of an explosion-proof liquefied gas cylinder includes the following steps:

[0050] S1: By welding a base 2 and a support plate 4 to the bottom of the liquefied gas cylinder 1, and then sleeving a first connecting sleeve 3 and a second connecting sleeve 5 on the outer sides of the base 2 and the liquefied gas cylinder 1 respectively, which serves to protect and prevent explosion when the liquefied gas cylinder 1 topples over.

[0051] S2: By installing a gas valve on the top of the liquefied gas cylinder 1, fixedly installing a connecting shell 8 on the outer side of the valve stem 6, rotatably installing a gear 9 below the connecting shell 8, communicatively installing a first threaded pipe 15 at the front end of the connecting shell 8, threadedly installing a first nut 16 on the outer side of the first threaded pipe 15, and bolting a traction steel rope 18 between the gear 9 and the first nut 16. Subsequently, the position of the gear 9 can be adjusted by the action of the first traction steel rope 18.

[0052] S3: Slidingly install a first stop block 31 inside the connecting shell 8, fixedly install a second stop block 32 on the side of the valve stem 6, and install a scroll spring 30 between the gear 9 and the first stop block 31. The scroll spring 30 is used to abut against the first stop block 31 and the second stop block 32, enabling the first stop block 31 and the second stop block 32 to open or close the gas valve.

[0053] S4: Install the rack 14 at the rear side of the gear 9. Then, by installing four groups of fixing plates 11, sliding plates 12 and shape memory alloy springs 13 at the rear side of the rack 14, arrange the fixing plates 11 equidistantly on the surface of the fixed ring 10, arrange the sliding plates 12 equidistantly on the surface of the rack 14, and connect the shape memory alloy springs 13 between the fixing plates 11 and the sliding plates 12. The shape memory alloy springs 13 can act on the gear 9, so that when the temperature of the device rises, the shape memory alloy springs 13 can automatically close the gas valve.

[0054] S5: Install a second threaded pipe 19 and a gas pipe 26 for docking with the first threaded pipe 15 at the front end of the first threaded pipe 15, and set a convex block 27 on the surface of the gas pipe 26. Install galvanized steel wires 28 between the convex block 27 and the gas pipe 26. The galvanized steel wires 28 can enhance the strength of the gas pipe 26, thus avoiding the situation of the gas pipe 26 being bent and blocked.

[0055] It should be noted that the present invention is an explosion-proof liquefied gas cylinder and its manufacturing method. First, as Figure 1 shown, when the device is in use, the liquefied gas cylinder 1 can be supported as a whole through the base 2, the first connecting sleeve 3 and the support plate 4. Through the first connecting sleeve 3 and the second connecting sleeve 5 made of rubber material, when the liquefied gas cylinder 1 is tilted, the first connecting sleeve 3 and the second connecting sleeve 5 are used to achieve the buffering function.

[0056] Figures 1 - 8 shown, when the ambient temperature around the device rises, the shape memory alloy springs 13 on the fixing plates 11 extend, driving the sliding plates 12 and the rack 14 to move to the right, so that the gear 9 below the connecting shell 8 rotates. When the gear 9 rotates clockwise, the first stop block 31 rotates clockwise and abuts against the second stop block 32, so that the second stop block 32 drives the valve rod 6 to rotate. Although the valve rod 6 can rotate counterclockwise to open the gas valve, under the elastic force of the scroll spring 30, the gas valve can always remain closed, so that the device automatically closes the gas valve when the temperature rises. At the same time, before the liquefied gas cylinder 1 and the gas pipe 26 are docked, through the scroll spring 30, when the valve rod 6 rotates counterclockwise, a resilience force will be generated, so that the device can prevent the valve from being accidentally opened before docking.

[0057] When the device docks the liquefied gas cylinder 1 and the gas pipe 26, by aligning the first threaded pipe 15 and the second threaded pipe 19, and then by unscrewing the first nut 16 and the second nut 22, after the first nut 16 and the second nut 22 are docked with each other, the damping pad 29 provides sealing performance. The connecting block 23 is slidably connected by the limiting block 24 in the second nut 22, so that the second magnet 25 behind the connecting block 23 moves to the position of the first magnet 17 and adsorbs on the first magnet 17, enabling the device to dock the first nut 16 and the second nut 22, and preventing the first nut 16 and the second nut 22 from rotating separately away from each other. At this time, the whole device remains sealed. When the liquefied gas cylinder 1 is removed later, the first nut 16 and the second nut 22 can be disengaged from the engagement by directly pulling the sliding ring 20. The galvanized steel wire 28 between the gas pipe 26 and the convex block 27 on the device prevents the bending angle of the gas pipe 26 from being too large, thus preventing the blockage of the gas pipe 26.

[0058] Although the present invention has been described above with reference to the embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the disclosed embodiments of the present invention can be combined with each other in any way. The exhaustive description of these combinations is not given in this specification only for the sake of saving space and resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An explosion-proof liquefied gas cylinder, comprising a liquefied gas cylinder (1), characterized in that: A fixing ring (10) is fixedly installed above the liquefied gas cylinder (1). A valve rod (6) is installed in the middle of the fixing ring (10). The top of the valve rod (6) is fixedly connected to a handwheel (7). A connecting shell (8) is fixedly installed on the surface of the fixing ring (10). A gear (9) is rotatably connected to the connecting shell (8). A first threaded pipe (15) is installed at the front end of the connecting shell (8). A first nut (16) is threadedly connected to the outside of the first threaded pipe (15). A damping pad (29) is rotatably installed at the front end of the first nut (16). A traction steel rope (18) is fixedly connected to the surface of the damping pad (29). The end of the traction steel rope (18) is connected to the gear (9). A rack (14) is meshed and connected to the rear side of the gear (9). A slide plate (12) is fixedly connected to the rear side of the rack (14). A shape memory alloy spring (13) is fixedly connected to the side of the slide plate (12). The end of the shape memory alloy spring (13) is fixedly connected to a fixing plate (11). The fixing plate (11) and the fixing ring (10) are fixedly connected. A scroll spring (30) is sleeved on the outside of the lower half of the connecting shell (8). A first stopper (31) is slidably connected to the inner wall of the connecting shell (8). A second stopper (32) is fixedly connected to the side of the valve rod (6). The head and tail ends of the scroll spring (30) are respectively connected to the first stopper (31) and the gear (9).

2. The explosion-proof liquefied gas cylinder according to claim 1, characterized in that: A base (2) is fixedly installed at the bottom of the liquefied gas cylinder (1). A first connecting sleeve (3) is fixedly connected to the outside of the base (2). A support plate (4) is fixedly connected between the first connecting sleeve (3) and the liquefied gas cylinder (1). A second connecting sleeve (5) is fixedly connected to the outside of the upper half of the liquefied gas cylinder (1).

3. The explosion-proof liquefied gas cylinder according to claim 2, characterized in that: The outer diameter of the first connecting sleeve (3) is the same as the outer diameter of the second connecting sleeve (5). The materials of the first connecting sleeve (3) and the second connecting sleeve (5) are both rubber. The support plates (4) are evenly distributed at equal angles between the liquefied gas cylinder (1) and the first connecting sleeve (3).

4. The explosion-proof liquefied gas cylinder according to claim 1, characterized in that: The central axes of the connecting shell (8) and the gear (9) are collinear. The gear (9) forms a first elastic structure with the connecting shell (8) and the first stopper (31) through the scroll spring (30). The position of the first stopper (31) corresponds to the position of the second stopper (32).

5. The explosion-proof liquefied gas cylinder according to claim 1, characterized in that: The fixed plate (11), the sliding plate (12) and the shape memory alloy spring (13) are distributed in several groups at equal intervals on the rear side of the rack (14). A second elastic structure is formed between the sliding plate (12) and the rack (14) through the shape memory alloy spring (13) between the fixed ring (10) and the fixed plate (11). The connection mode between the rack (14) and the fixed ring (10) is a sliding connection. The gear (9) forms a first rotating structure with the connection shell (8) through the shape memory alloy spring (13) and the rack (14).

6. The explosion-proof liquefied gas cylinder according to claim 1, characterized in that: A second threaded pipe (19) is provided at the front end of the first threaded pipe (15). A second nut (22) is threadedly installed on the outer side of the second threaded pipe (19). A limiting block (24) is slidably installed inside the second nut (22). A connecting block (23) is fixedly connected to the surface of the limiting block (24).

7. The explosion-proof liquefied gas cylinder according to claim 6, characterized in that: A sliding ring (20) is slidably installed on the outer side of the second threaded pipe (19). A pull rope (21) is bolted to the surface of the sliding ring (20). The end of the pull rope (21) is connected to the connecting block (23). A gas pipe (26) is fixedly connected to the end of the second threaded pipe (19).

8. The explosion-proof liquefied gas cylinder according to claim 7, characterized in that: A second magnetic block (25) is fixedly arranged on the surface of the connecting block (23). A first magnetic block (17) is fixedly connected to the surface of the first nut (16). The number and position of the first magnetic blocks (17) correspond one by one to the number and position of the second magnetic blocks (25). The second magnetic block (25) forms a sliding structure with the second nut (22) through the limiting block (24).

9. The explosion-proof liquefied gas cylinder according to claim 7, characterized in that: A convex block (27) is fixedly connected to the outer side of the gas pipe (26). Galvanized steel wires (28) are fixedly arranged inside the convex block (27) and the gas pipe (26). The galvanized steel wires (28) and the convex block (27) are distributed at equal angles on the outer side of the gas pipe (26).

10. A manufacturing method of an explosion-proof liquefied gas cylinder, the explosion-proof liquefied gas cylinder according to any one of claims 1-9, characterized in that, comprising the following steps: S1: By welding a base (2) and a support plate (4) to the bottom of the liquefied gas cylinder (1), and then sleeving a first connecting sleeve (3) and a second connecting sleeve (5) on the outer sides of the base (2) and the liquefied gas cylinder (1) respectively; S2: By installing a gas valve on the top of the liquefied gas cylinder (1), fixedly installing a connection shell (8) on the outer side of the valve stem (6), rotatably installing a gear (9) below the connection shell (8), communicating and installing a first threaded pipe (15) at the front end of the connection shell (8), threadedly installing a first nut (16) on the outer side of the first threaded pipe (15), and bolting a traction steel rope (18) between the gear (9) and the first nut (16); S3: Slide and install the first stop block (31) inside the connecting shell (8), fix the second stop block (32) on the side of the valve stem (6), and install the scroll spring (30) between the gear (9) and the first stop block (31); S4: Install the rack (14) behind the gear (9), and then install four groups of fixing plates (11), sliding plates (12) and shape memory alloy springs (13) behind the rack (14). Arrange the fixing plates (11) equidistantly on the surface of the fixing ring (10), arrange the sliding plates (12) equidistantly on the surface of the rack (14), and connect the shape memory alloy springs (13) between the fixing plates (11) and the sliding plates (12); S5: Install the second threaded pipe (19) and the gas pipe (26) for docking with the first threaded pipe (15) at the front end of the first threaded pipe (15), set a convex block (27) on the surface of the gas pipe (26), and install galvanized steel wires (28) between the convex block (27) and the gas pipe (26).

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