An inflating device for small gas cylinders

Abstract

The present invention relates to the technical field of gas cylinder filling equipment, and discloses a gas filling device for small gas cylinders, comprising a filling platform, an upper fixing platform connected to the filling platform via a guide rod, a filling pipeline fixed on the upper fixing platform; a lifting and sliding jacking fixture is provided on the guide rod, the main part of the lifting and fixing device is located in the filling platform, an external cylinder is fixed in the filling platform, the end of the telescopic push rod of the external cylinder is fixed to the bottom of the lifting and fixing device, a plurality of through holes are provided at the top of the lifting and fixing device at positions corresponding to the lower parts of each connector, an elastic support plate is provided in each through hole, and the bottom of each elastic support plate is supported on a bottom column; an outer sleeve is respectively sleeved on the outer side of each bottom column, and each outer sleeve is lifted and slid on the corresponding bottom column. The problems of leakage during the inflation of small and medium-sized gas cylinders in the prior art, poor protection effect, gas cylinder bouncing, and lack of a structure for timely closing the valve when leaking are solved.

Description

Technical Field

[0001] The invention relates to the technical field of gas cylinder filling equipment, in particular to a gas filling device for small gas cylinders. Background Art

[0002] In many fields such as industrial production, medical emergency, scientific research experiments, etc., small gas cylinders are widely used for gas storage and transportation because of their characteristics of being easy to carry, store and use. As a key equipment, the performance of the small gas cylinder inflation device directly affects the safety and reliability of the gas cylinder use. Existing small gas cylinder inflation devices usually use simple valve control and pressure monitoring structures to achieve the inflation operation of the gas cylinder through manual or mechanical means. This type of inflation device can meet basic inflation needs to a certain extent, but with the increasing complexity of usage scenarios and the continuous improvement of safety performance requirements, its limitations have gradually become apparent.

[0003] First, in terms of leakage prevention, the sealing structure design of existing inflation devices is relatively simple. When used for a long time or subjected to external force, the sealing components are prone to wear and aging, resulting in gas leakage, which not only wastes resources but also may cause safety hazards. Secondly, the protective performance is insufficient. When the pressure rises abnormally during the inflation process, it is easy to cause the gas cylinder to eject and bounce, seriously threatening the safety of personnel and equipment, and also threatening other gas cylinders. Furthermore, in terms of stability, existing inflation devices are prone to loosening and displacement of components when faced with complex usage environments or frequent operations, resulting in unstable inflation process and affecting inflation efficiency and quality. Finally, when a leak occurs, most existing inflation devices rely on manual discovery and manual closure of the valve. Since the leak is not easy to detect in the early stage, the best closing time is often missed, and the leak cannot be blocked in time, resulting in the expansion of the leak range and more serious consequences. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the present invention provides an inflation device for small gas cylinders, which has the advantages of leak prevention, strong protection effect, strong stability, and automatic valve closing in case of leakage. It solves the problems of leakage during inflation of small and medium-sized gas cylinders in the existing technology, poor protection effect, gas cylinder bouncing, and lack of a structure to close the valve in time in case of leakage.

[0006] (2) Technical solution

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A charging device for small gas cylinders, comprising a filling platform, the upper portion of which is connected to an upper fixing platform via a guide rod, a filling pipeline fixed above the upper fixing platform, the filling pipeline comprising a main pipe and multiple branch pipes, each branch pipe passing through the upper fixing platform and provided with a connector at the bottom of the upper fixing platform, each connector being used to connect to a gas cylinder, and the filling gas is sequentially passed through the main pipe, the branch pipe, and the connector before being filled into each gas cylinder;

[0009] A lifting and fixing device is provided on the guide rod for lifting and sliding. The main body of the lifting and fixing device is located in the filling platform. An external cylinder is fixed in the filling platform. The end of the telescopic push rod of the external cylinder is fixed to the bottom of the lifting and fixing device. A plurality of through holes are provided on the top of the lifting and fixing device at positions corresponding to the lower parts of each connecting head. An elastic support plate is provided in each through hole. The bottom of each elastic support plate is supported on a bottom column. Each bottom column is fixed in the lifting and fixing device. The lifting and fixing device is lifted by controlling the external cylinder so that the elastic support plate is pressed against the bottom of the gas cylinder to provide elastic support.

[0010] An outer sleeve is respectively sleeved on the outside of each base column, and each outer sleeve is lifted and slid on the corresponding base column. The outer sides of the bottoms of all outer sleeves are fixed on the same movable bottom plate. A built-in cylinder is also provided in the lifting and fixing device, and the end of the telescopic push rod of the built-in cylinder is fixed on the movable bottom plate. By controlling the built-in cylinder to push the movable bottom plate to lift, each outer sleeve rises to a position that wraps each gas cylinder.

[0011] Preferably, each outer sleeve is provided with a spiral air channel, and an air pump and an air cavity are fixed on the movable bottom plate. Each spiral air channel is connected to the air outlet of the air pump through the cavity in the movable bottom plate, or each spiral air channel is directly connected to the air outlet of the air pump through the air channel.

[0012] The air pump air inlet is connected to the air cavity, and an air inlet with a one-way valve is provided on the air cavity shell. A refrigeration component is provided in the air cavity to cool the gas sucked into the air cavity and then discharge it into each spiral air duct through the air pump. The air outlet of each spiral air duct is provided on the outer wall of the outer sleeve near the top.

[0013] Preferably, the air outlet position of each spiral air duct is respectively provided with a regulating air port, and any regulating air port includes a regulating air duct running through the inside and outside of the outer sleeve, the regulating air duct is communicated with the spiral air duct, a regulating air core is slidably connected in the regulating air duct, and a spring is connected to the regulating air core near the outside of the outer sleeve;

[0014] When there is no leakage in the gas cylinder in the outer sleeve, the regulating gas core is pushed to the inner side of the regulating air channel by the spring. At this time, the spiral air channel is connected to the outside through the regulating air channel, so that the cold air in the air cavity is discharged into the spiral air channel through the air pump and discharged through the outside of the regulating air channel; when the gas cylinder in the outer sleeve leaks, the regulating gas core is pushed outward by the air pressure in the outer sleeve. At this time, the spiral air channel is connected to the internal cavity of the outer sleeve through the regulating air channel, so that the chemical gas leaked in the outer sleeve is sucked into the air cavity through the regulating air channel by the air pump. When the temperature of the air cavity rises due to the filling of gas, it can be cooled by the refrigeration component.

[0015] Preferably, a sleeve is provided below the upper fixing platform at the position outside each connecting head, and the inner wall of each sleeve is fitted on the outer wall of the top of the corresponding outer sleeve. The upper fixing platform is provided with an air-deflation closing valve mechanism at the position inside the sleeve, which is used to close the corresponding branch pipe when air is deflated. The jacking and fixing device is provided with an air-deflation locking mechanism at the position inside the outer sleeve, which is used to lock the jacking and fixing device when air is deflated, so as to prevent the outer sleeve from being manually opened when air is deflated.

[0016] Preferably, the degassing valve closing mechanism includes a gas pressure sensor arranged in the sleeve and an automatic shut-off valve arranged on the branch pipe, and when the pressure sensor detects a pressure increase, the automatic shut-off valve is controlled to close the branch pipe;

[0017] Alternatively, the air leakage valve closing mechanism includes a stop valve arranged on the branch pipe, the sleeve is connected to the stop valve through a ventilation channel, and the pressure generated by the leakage pushes the valve core to move to the position of closing the stop valve.

[0018] Preferably, the deflation locking mechanism includes a pressure sensor provided in the outer sleeve and an electromagnetic locking device provided on the side of the lifting fixture. A side baffle is provided in the filling platform at the side of the lifting fixture. Positioning holes are arranged in an array on the side baffle. When the pressure sensor in the outer sleeve detects an increase in pressure, the locking tongue of the locking device is controlled to pop out and get stuck in the positioning hole, thereby locking the lifting fixture in a fixed position.

[0019] Alternatively, the air-deflation locking mechanism includes a mechanical pressure-type locking device arranged on the side of the jacking and fixing device, a through hole is provided on the elastic support plate to connect the inner cavity of the outer sleeve with the bottom column, and a ventilation channel is provided in the bottom column. One end of the ventilation channel is connected to the inner cavity of the outer sleeve and the other end is connected to the locking device. The pressure generated by the leakage pushes the lock tongue of the locking device to move to a position where it is inserted into the positioning hole.

[0020] Preferably, the filling station includes a frame, the guide rod is arranged at the top of the frame, a lower support plate is provided near the bottom of the frame, the external cylinder is fixed on the lower support plate, a through hole is provided on the lower support plate at a position corresponding to the built-in cylinder, and the side baffle is fixed above the lower support plate.

[0021] Preferably, the lower end of the connector is provided with an external thread section, and the bottle mouth of the gas cylinder is provided with an internal thread interface adapted to the external thread section; an axially through-going inflation channel is provided inside the connector, the inflation channel is communicated with the channel in the branch pipe, and an annular sealing gasket is embedded in the opening of the lower end of the inflation channel. When the connector is screwed into the internal thread interface of the gas cylinder through a thread, the annular sealing gasket forms a sealing fit with the end face of the bottle mouth of the gas cylinder;

[0022] An axially movable push rod is provided in the inflation channel, the upper end of the push rod is elastically connected to the top of the inflation channel through a spring, and the lower end extends below the annular sealing gasket;

[0023] When the connector is fully connected to the gas cylinder, the lower end of the push rod abuts against the valve core of the cylinder valve in the gas cylinder and pushes it open, so that the inflation channel is connected to the interior of the gas cylinder; when the connector is unscrewed, the push rod is reset under the action of the spring, and the valve core of the cylinder valve in the gas cylinder is closed under the action of its own spring force.

[0024] Preferably, the electromagnetic locking device includes a lock tongue, a return spring and an electromagnetic coil. A wedge-shaped guide surface is provided at the end of the lock tongue. The positioning hole is a conical hole adapted to the wedge-shaped guide surface. When the electromagnetic coil is energized, the lock tongue extends, and when the power is off, the return spring pushes the lock tongue to retract.

[0025] Preferably, a control panel is provided on the side of the filling station, and the control panel includes a PLC controller, a display screen and control buttons. The PLC controller is electrically connected to the external cylinder, the internal cylinder, the air pump, the refrigeration assembly and the automatic shut-off valve respectively. The display screen is used to display the filling pressure of each gas cylinder, the temperature in the air cavity and the working status of the system.

[0026] (3) Beneficial effects

[0027] Compared with the prior art, the present invention provides an inflator for a small gas cylinder, which has the following beneficial effects:

[0028] 1. The inflation device for the small gas cylinder is provided with a liftable jacking fixture in the filling platform, and a liftable outer sleeve in the jacking fixture. The outer sleeve is used to wrap the gas cylinder during filling, thereby preventing the leaked gas from escaping into the air and preventing the loosely connected gas cylinder from bouncing. At the same time, a deflation valve closing mechanism and a deflation locking mechanism are respectively provided on the upper and lower parts of the cavity in the outer sleeve. When deflation occurs, the sealing property of the outer sleeve is utilized, and a pressure sensor or an air pressure-propelled structure is used to automatically close the branch pipe at the first moment of deflation, so that the jacking fixture is automatically locked on the side baffle for static sliding, thereby avoiding the outer sleeve from opening and causing leakage during deflation.

[0029] 2. The inflation device for the small gas cylinder is provided with a spiral air channel in the outer sleeve. The air pump provided on the movable bottom plate is used to pass the cooling gas in the air cavity into the spiral air channel through the air pump for cooling and heat dissipation, thereby preventing the gas cylinder from heating up due to pressure increase during the filling process. At the same time, the outer sleeve as a protective cover is used as a radiator, thereby ensuring the sealing and increasing the heat dissipation efficiency.

[0030] 3. The inflation device for the small gas cylinder is provided with a regulating air port at the air outlet of the spiral air duct, and a regulating air core and a spring are provided in the regulating air port. When there is no leakage in the gas cylinder in the outer sleeve, the regulating air core is pushed by the spring to the inner side of the regulating air duct, and the cold air in the air cavity is discharged into the spiral air duct by the air pump and discharged through the outside of the regulating air duct. When the gas cylinder in the outer sleeve leaks, the regulating air core is pushed outward by the air pressure in the outer sleeve, and the chemical gas leaked in the outer sleeve is sucked into the air cavity through the regulating air duct by the air pump. When the temperature in the air cavity rises due to the filling of gas, it can be cooled by the refrigeration component. When a sudden increase in temperature occurs due to leakage, it can also be discharged into the air cavity through the spiral air duct to avoid explosion caused by a sudden pressure increase. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the overall front structure of the present invention. At this time, the gas cylinder has been fixed to the connector of the filling pipeline, and the jacking and fixing device has not been raised.

[0032] Figure 2 This is a schematic diagram of the overall back structure of the present invention, and the state is similar to Figure 1 same.

[0033] Figure 3 This is a cross-sectional view of the present invention, the viewing angle is front view, the section line is located in the middle of the two exhaust cylinders, the state is the same as Figure 1 same.

[0034] Figure 4 This is a cross-sectional view of the present invention, the viewing angle is front view, the section line passes through the center of the gas cylinder, the state is the same as Figure 1 same.

[0035] Figure 5 This is a schematic diagram of the overall front structure of the present invention. At this time, the jacking and fixing device is raised, and the outer sleeve wraps the gas cylinder.

[0036] Figure 6 This is a schematic diagram of the overall back structure of the present invention, and the state is similar to Figure 5 same.

[0037] Figure 7 This is a cross-sectional view of the present invention, the viewing angle is front view, the section line is located in the middle of the two exhaust cylinders, the state is the same as Figure 5 same.

[0038] Figure 8 This is a cross-sectional view of the present invention, the viewing angle is front view, the section line passes through the center of the gas cylinder, the state is the same as Figure 5 same.

[0039] Figure 9 This is an exploded view of the present invention.

[0040] Figure 10 This is a schematic diagram of the back structure of the filling station of the present invention.

[0041] Figure 11 It is a schematic diagram of the back structure of the jacking and fixing device of the present invention.

[0042] Figure 12 It is a schematic diagram of the assembly structure of the upper fixing platform and the filling pipeline of the present invention.

[0043] Figure 13 It is a structural schematic diagram of the gas cylinder of the present invention.

[0044] Figure 14 It is a schematic diagram of the assembly structure of the external lifting frame, elastic support plate, built-in cylinder and bottom column of the present invention.

[0045] Figure 15 This is an assembly cross-sectional view of the outer lifting frame, elastic support plate, built-in cylinder and bottom column of the present invention.

[0046] Figure 16 The figure is a schematic diagram of the assembly structure of the outer sleeve, movable base plate, air cavity and air pump of the present invention.

[0047] Figure 17 This is an assembly cross-sectional view of the outer sleeve, movable base plate, air cavity and air pump of the present invention, with the section line located between two rows of outer sleeves.

[0048] Figure 18 This is an assembly cross-sectional view of the outer sleeve, movable base plate, air cavity and air pump of the present invention, with the section line passing through the center of the outer sleeve.

[0049] Figure 19 This is a cross-sectional view of the air port adjustment of the present invention.

[0050] In the figure: 1, filling platform; 11, frame; 12, lower support plate; 13, side baffle; 14, external cylinder; 15, guide rod; 131, positioning hole;

[0051] 2. Lifting fixture; 21. External lifting frame; 22. Elastic support plate; 23. Internal cylinder; 24. Bottom column; 25. Outer sleeve; 26. Movable bottom plate; 27. Air cavity; 28. Air pump; 29. ​​Locking device; 251. Spiral air channel; 252. Adjustable air port; 2521. Adjustable air channel; 2522. Adjustable air core;

[0052] 3. Gas cylinder; 31. Manual valve;

[0053] 4. Upper fixed platform; 41. Seat;

[0054] 5. Filling pipeline; 51. Main pipe; 52. Branch pipe; 53. Automatic shut-off valve; 54. Connector. DETAILED DESCRIPTION

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0056] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0057] In addition, a fixed connection refers to a connection in which parts or components are fixed without any relative movement; a transmission connection refers to a connection method in which mechanical motion or torque is transmitted to other working parts through a transmission part; a sliding connection refers to a connection method in which two objects are in contact but not fixed and can slide relative to each other; a rotating connection refers to a connection method in which two objects are in contact but not fixed and can rotate relative to each other.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features being referred to. Thus, features specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0059] Example 1:

[0060] This embodiment provides an inflation device for a small gas cylinder, having the following technical features.

[0061] See also Figure 1-19 A filling device for small gas cylinders includes a filling platform 1, which is connected to an upper fixed platform 4 through a guide rod 15 above the filling platform 1. A filling pipeline 5 is fixed above the upper fixed platform 4. The filling pipeline 5 includes a main pipe 51 and multiple branch pipes 52. Each branch pipe 52 passes through the upper fixed platform 4 and is provided with a connector 54 at the bottom of the upper fixed platform 4. Each connector 54 is used to connect to a gas cylinder 3 respectively. The filling gas passes through the main pipe 51, the branch pipe 52 and the connector 54 in sequence and is filled into each gas cylinder 3; a lifting fixture 2 is provided on the guide rod 15 for lifting and sliding. The main part of the lifting fixture 2 is located in the filling platform 1. An external cylinder 14 is fixed in the filling platform 1. The end of the telescopic push rod of the external cylinder 14 is fixed to the bottom of the lifting fixture 2, and the top of the lifting fixture 2 is below the corresponding connector 54. There are multiple through holes in the position, and an elastic support plate 22 is provided in each through hole. The bottom of each elastic support plate 22 is supported on the bottom column 24, and each bottom column 24 is fixed in the jacking and fixing device 2. The jacking and fixing device 2 is pushed up by controlling the external cylinder 14, so that the elastic support plate 22 is pressed against the bottom of the gas cylinder 3 to provide elastic support; the outer side of each bottom column 24 is respectively sleeved with an outer sleeve 25, and each outer sleeve 25 is lifted and slid on the corresponding bottom column 24. The outer side of the bottom of all outer sleeves 25 is fixed on the same movable bottom plate 26. A built-in cylinder 23 is also provided in the jacking and fixing device 2, and the end of the telescopic push rod of the built-in cylinder 23 is fixed on the movable bottom plate 26. The movable bottom plate 26 is pushed up by controlling the built-in cylinder 23 to make each outer sleeve 25 rise to a position that wraps each gas cylinder 3.

[0062] It should be noted that the outer wall of the outer sleeve 25 is attached to the inner wall of the top through hole of the jacking and fixing device 2, the outer wall of the bottom column 24 is attached to the inner wall of the outer sleeve 25, the outer edge of the elastic support plate 22 is attached to the inner wall of the outer sleeve 25, and the inner diameter of each outer sleeve 25 is larger than the outer diameter of each gas cylinder 3.

[0063] It should be noted that the part of the lifting and fixing device 2 inside the filling platform 1 is provided with an outer lifting frame 21 , the bottom column 24 and the outer sleeve 25 are both inside the outer lifting frame 21 , and the built-in cylinder 23 is provided at the bottom position of the outer lifting frame 21 .

[0064] In an optional embodiment, a spiral spiral air duct 251 is respectively provided in each outer sleeve 25, and an air pump 28 and an air cavity 27 are also fixed on the movable base plate 26. Each spiral air duct 251 is connected to the air outlet of the air pump 28 through the cavity in the movable base plate 26, or each spiral air duct 251 is directly connected to the air outlet of the air pump 28 through the air duct; the air inlet of the air pump 28 is connected to the air cavity 27, and an air inlet with a one-way valve is provided on the shell of the air cavity 27. A refrigeration component is provided in the air cavity 27 to cool the gas sucked into the cavity of the air cavity 27 and discharge it into each spiral air duct 251 through the air pump 28. The air outlet of each spiral air duct 251 is provided on the outer wall near the top of the outer sleeve 25.

[0065] It should be noted that the refrigeration components in the air cavity 27 include semiconductor refrigeration plates, heat dissipation fins, heat dissipation fans and heat conduction plates. The hot end of the semiconductor refrigeration plates faces outward and the cold end faces inward. The heat dissipation fins are fixed to the hot end. The heat dissipation fan is used to accelerate heat dissipation. The heat conduction plate is connected to the cold end. A temperature sensor is also provided in the air cavity and connected to the controller. The controller adjusts the current of the semiconductor refrigeration plates according to the detected temperature.

[0066] In an optional embodiment, the air outlet position of each spiral air channel 251 is respectively provided with a regulating air port 252, and any regulating air port 252 includes a regulating air channel 2521 that runs through the inside and outside of the outer sleeve 25, the regulating air channel 2521 is communicated with the spiral air channel 251, and a regulating air core 2522 is slidably connected in the regulating air channel 2521, and a spring is connected to the regulating air core 2522 near the outside of the outer sleeve 25; when there is no leakage of the gas cylinder 3 in the outer sleeve 25, the regulating air core 2522 is pushed by the spring to the inner position of the regulating air channel 2521, and the spiral air channel 251 is adjusted by the regulating air channel 2521. The throttle channel 2521 is connected to the outside world, so that the cold air in the air cavity 27 is discharged into the spiral air channel 251 through the air pump 28, and is discharged from the outside of the regulating air channel 2521; when the gas cylinder 3 in the outer sleeve 25 leaks, the regulating gas core 2522 is pushed outward by the air pressure in the outer sleeve 25. At this time, the spiral air channel 251 is connected to the internal cavity of the outer sleeve 25 through the regulating air channel 2521, so that the chemical gas leaked in the outer sleeve 25 is sucked into the air cavity 27 through the regulating air channel 2521 through the air pump 28. When the temperature in the air cavity 27 rises due to the filling of gas, it can be cooled by the refrigeration component.

[0067] It should be noted that air pump 28 is a reversible air pump. The motor drives the impeller, which in turn propels the gas flow. When the motor rotates forward, gas is drawn in through the inlet and discharged through the outlet. When the motor rotates backward, the gas flow reverses, drawn in through the original outlet and discharged through the inlet. By switching the motor's direction of rotation, gas flow is achieved in both directions.

[0068] It should be noted that limiting structures, such as bosses, are provided at both inner and outer ends of the regulating air channel 2521 to limit the regulating air core 2522 from sliding in the regulating air channel 2521. When the regulating air core 2522 moves to the innermost side of the regulating air channel 2521, the outer end of the regulating air core 2522 covers a portion of the spiral air channel 251. During the outward sliding process of the regulating air core 2522, the inner side of the regulating air core 2522 is still located at a position that has not moved to the spiral air channel 251 before the outer side of the regulating air core 2522 completely covers the spiral air channel 251, thereby avoiding the inside and outside of the regulating air channel 2521 being connected when the regulating air core 2522 moves to the middle position.

[0069] In an optional embodiment, a sleeve 41 is provided below the upper fixed platform 4 at the outer side of each connecting head 54, and the inner wall of each sleeve 41 is fitted on the outer wall of the top of the corresponding outer sleeve 25. The upper fixed platform 4 is provided with an air-deflation closing valve mechanism at a position inside the sleeve 41, which is used to close the corresponding branch pipe 52 when air is deflated. The jacking and fixing device 2 is provided with an air-deflation locking mechanism at a position inside the outer sleeve 25, which is used to lock the jacking and fixing device 2 when air is deflated to prevent the outer sleeve 25 from being manually opened when air is deflated.

[0070] It should be noted that an inclined chamfer is provided at the bottom of each sleeve 41 , with the chamfer facing outward to facilitate the insertion of the top of the outer sleeve 25 into the sleeve 41 . A rubber sealing ring is provided on the inside of the sleeve 41 to maintain a seal with the outer wall of the outer sleeve 25 .

[0071] In an optional embodiment, the degassing valve closing mechanism includes a gas pressure sensor arranged in the sleeve 41 and an automatic stop valve 53 arranged on the branch pipe 52. When the pressure sensor detects an increase in pressure, the automatic stop valve 53 is controlled to close the branch pipe 52; or, the degassing valve closing mechanism includes a stop valve arranged on the branch pipe 52, and the sleeve 41 is connected to the stop valve through an air passage, and the pressure generated by the leakage pushes the valve core to move to the position of closing the stop valve.

[0072] In an optional embodiment, the air-deflation locking mechanism includes a pressure sensor arranged in the outer sleeve 25 and an electromagnetic locking device 29 arranged on the side of the jacking and fixing device 2. A side baffle 13 is arranged on the side of the jacking and fixing device 2 in the filling platform 1, and positioning holes 131 are arranged in an array on the side baffle 13. When the pressure sensor in the outer sleeve 25 detects an increase in pressure, the locking tongue of the locking device 29 is controlled to pop out and get stuck in the positioning hole 131, thereby locking the jacking and fixing device 2 in a fixed position; or, the air-deflation locking mechanism includes a mechanical pressure-type locking device 29 arranged on the side of the jacking and fixing device 2, a through hole is provided on the elastic support plate 22 to connect the inner cavity of the outer sleeve 25 with the bottom column 24, and a ventilation channel is provided in the bottom column 24, one end of the ventilation channel is connected to the inner cavity of the outer sleeve 25, and the other end is connected to the locking device 29, and the pressure generated by the leakage pushes the locking tongue of the locking device 29 to move to a position inserted into the positioning hole 131.

[0073] In an optional embodiment, the filling station 1 includes a frame 11, a guide rod 15 is arranged at the top of the frame 11, a lower support plate 12 is arranged near the bottom of the frame 11, an external cylinder 14 is fixed on the lower support plate 12, a through hole is provided in the lower support plate 12 at a position corresponding to the built-in cylinder 23, and a side baffle 13 is fixed above the lower support plate 12.

[0074] In an optional embodiment, the lower end of the connecting head 54 is provided with an external threaded section, and the bottle mouth of the gas cylinder 3 is provided with an internal threaded interface that is compatible with the external threaded section; an axially through-going inflation channel is provided inside the connecting head 54, and the inflation channel is connected to the channel in the branch pipe 52, and an annular sealing gasket is embedded in the opening of the lower end of the inflation channel. When the connecting head 54 is screwed into the internal threaded interface of the gas cylinder 3 through a thread, the annular sealing gasket forms a sealing fit with the bottle mouth end face of the gas cylinder 3; an axially movable push rod is provided in the inflation channel, the upper end of the push rod is elastically connected to the top of the inflation channel by a spring, and the lower end extends to below the annular sealing gasket; when the connecting head 54 is fully connected to the gas cylinder 3, the lower end of the push rod abuts against the valve core of the bottle valve in the gas cylinder 3 and pushes it open, so that the inflation channel is connected to the inside of the gas cylinder 3; when the connecting head 54 is unscrewed, the push rod is reset under the action of the spring, and the valve core of the bottle valve in the gas cylinder 3 is closed under the action of its own spring force.

[0075] In an optional embodiment, the electromagnetic locking device 29 includes a lock tongue, a return spring and an electromagnetic coil. A wedge-shaped guide surface is provided at the end of the lock tongue. The positioning hole 131 is a conical hole adapted to the wedge-shaped guide surface. When the electromagnetic coil is energized, the lock tongue extends, and when the power is off, the return spring pushes the lock tongue to retract.

[0076] In an optional embodiment, a control panel is provided on the side of the filling station 1, and the control panel includes a PLC controller, a display screen and control buttons. The PLC controller is electrically connected to the external cylinder 14, the internal cylinder 23, the air pump 28, the refrigeration component and the automatic shut-off valve 53 respectively. The display screen is used to display the filling pressure of each gas cylinder 3, the temperature in the air cavity 27 and the system working status.

[0077] In an optional embodiment, each elastic support plate 22 is composed of a spring and a support plate, and the upper and lower ends of the spring are respectively connected to the top of the bottom column 24 and the bottom of the support plate.

[0078] In an optional embodiment, a manual valve 31 is provided on the gas cylinder 3 for manually opening and closing the gas cylinder 3 .

[0079] In an optional embodiment, a lockable universal wheel is provided at the bottom of the frame 11, an explosion-proof cabinet is provided on the side of the frame 11, a backup power supply and an emergency control system are provided inside the explosion-proof cabinet, and a transparent observation window and an emergency stop button are provided on the surface of the explosion-proof cabinet.

[0080] In an optional embodiment, a total pressure gauge and a total flow regulating valve are provided on the main pipe 51, and a sub-pressure gauge and a sub-flow regulating valve are provided on each branch pipe 52. The sub-pressure gauges and sub-flow regulating valves are located above the upper fixed platform 4 to facilitate observation and adjustment by the operator.

[0081] In an optional embodiment, a temperature sensor is provided in the outer sleeve 25 .

[0082] Gas cylinder filling steps:

[0083] (1) Place the small gas cylinders 3 on the elastic support plate 22 on top of the lifting fixture 2, so that the gas cylinders 3 are directly below the corresponding connectors 54, and connect the gas nozzles of each gas cylinder 3 to the corresponding connectors 54 to ensure a tight connection to prevent gas leakage;

[0084] (2) Control the external cylinder 14 to start, and its telescopic push rod pushes the lifting fixture 2 up along the guide rod 15, driving the elastic support plate 22 to rise synchronously and press against the bottom of the gas cylinder 3, providing elastic support for the gas cylinder 3 and ensuring that the gas cylinder remains stable during the filling process;

[0085] (3) Start the built-in cylinder 23, and its telescopic push rod pushes the movable bottom plate 26 to rise. Since the outer sides of the bottoms of all outer sleeves 25 are fixed on the movable bottom plate 26, each outer sleeve 25 rises synchronously along the bottom column 24. As the outer sleeve 25 rises, its outer wall fits against the inner wall of the through hole at the top of the jacking fixture 2, gradually wrapping around the gas cylinder 3, providing protection for the outer shell and preventing the gas cylinder from being damaged due to accidental collision or shaking during the filling process;

[0086] (4) Open the filling pipeline 5, and the gas will be filled into each gas cylinder 3 through the main pipe 51, branch pipe 52 and connector 54 in sequence. Observe the filling pressure and the status of the gas cylinder during the filling process;

[0087] (5) After filling is completed, the filling pipeline 5 is first closed, and then the internal cylinder 23 is controlled to retract, driving the movable bottom plate 26 to descend, so that the outer sleeve 25 is separated from the gas cylinder 3 and returns to the initial position. Then, the external cylinder 14 is controlled to retract, and the jacking fixture 2 and the gas cylinder 3 are lowered to the initial position. Finally, the connection between the gas cylinder 3 and the connector 54 is disconnected, and the filled gas cylinder 3 is taken out.

[0088] To sum up, the inflation device for the small gas cylinder is provided with a liftable lifting and fixing device 2 in the filling platform 1, and a liftable outer sleeve 25 in the lifting and fixing device 2. The outer sleeve 25 is used to wrap the gas cylinder 3 during filling, so as to prevent the leaked gas from escaping into the air and prevent the loosely connected gas cylinder from bouncing. At the same time, a deflation valve closing mechanism and a deflation locking mechanism are respectively provided above and below the cavity in the outer sleeve 25. When deflation occurs, the sealing property of the outer sleeve 25 is utilized, and a pressure sensor or an air pressure pushing structure is used to automatically close the branch pipe 52 at the first time of deflation, so that the lifting and fixing device 2 is automatically locked on the side baffle 13 to slide statically, thereby avoiding leakage caused by opening the outer sleeve 25 during deflation.

[0089] The inflation device for the small gas cylinder is configured by providing a spiral air channel 251 in the outer sleeve 25, and utilizing an air pump 28 provided on the movable bottom plate 26 to pass the cooling gas in the air cavity 27 into the spiral air channel 251 through the air pump 28 for cooling and heat dissipation, thereby preventing the gas cylinder from heating up due to pressure increase during the filling process. At the same time, the outer sleeve 25 serving as a protective cover is utilized as a radiator, thereby increasing the heat dissipation efficiency while ensuring sealing.

[0090] The inflation device for the small gas cylinder is provided with a regulating air port 252 at the air outlet of the spiral air channel 251, and a regulating air core 2522 and a spring are provided in the regulating air port 252. When there is no leakage in the gas cylinder 3 in the outer sleeve 25, the regulating air core 2522 is pushed by the spring to the inner position of the regulating air channel 2521, and the cold air in the air cavity 27 is discharged into the spiral air channel 251 through the air pump 28 and discharged through the outside of the regulating air channel 2521. When the gas cylinder 3 in the outer sleeve 25 leaks, the regulating air core 2522 is pushed outward by the air pressure in the outer sleeve 25, and the chemical gas leaked in the outer sleeve 25 is sucked into the air cavity 27 through the regulating air channel 2521 through the air pump 28. When the temperature in the air cavity 27 rises due to the filling of gas, it can be cooled by the refrigeration component. When a leakage causes a sudden increase in temperature, it can also be discharged into the air cavity 27 through the spiral air channel 251 to avoid an explosion caused by a sudden pressure increase.

[0091] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0092] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An inflator for a small gas cylinder, characterized in that: The invention comprises a filling platform (1), wherein the upper portion of the filling platform (1) is connected to an upper fixed platform (4) via a guide rod (15), a filling pipeline (5) is fixed above the upper fixed platform (4), and the filling pipeline (5) comprises a main pipe (51) and a plurality of branch pipes (52), each branch pipe (52) passes through the upper fixed platform (4) and is provided with a connector (54) at the bottom of the upper fixed platform (4), each connector (54) is used to connect to a gas cylinder (3), respectively, and the filling gas passes through the main pipe (51), the branch pipe (52) and the connector (54) in sequence and is then filled into each gas cylinder (3); A lifting fixture (2) is provided on the guide rod (15) for lifting and sliding. The main body of the lifting fixture (2) is located in the filling platform (1). An external cylinder (14) is fixed in the filling platform (1). The end of the telescopic push rod of the external cylinder (14) is fixed to the bottom of the lifting fixture (2). The top of the lifting fixture (2) is provided with a plurality of through holes at positions below corresponding to each connector (54). An elastic support plate (22) is provided in each through hole. The bottom of each elastic support plate (22) is supported on a bottom column (24). Each bottom column (24) is fixed in the lifting fixture (2). By controlling the external cylinder (14) to push the lifting fixture (2) up, the elastic support plate (22) is pressed against the bottom of the gas cylinder (3) to provide elastic support. The outer side of each base column (24) is respectively sleeved with an outer sleeve (25), and each outer sleeve (25) is lifted and slid on the corresponding base column (24). The outer sides of the bottoms of all outer sleeves (25) are fixed on the same movable bottom plate (26). The lifting and fixing device (2) is also provided with a built-in cylinder (23), and the end of the telescopic push rod of the built-in cylinder (23) is fixed on the movable bottom plate (26). By controlling the built-in cylinder (23) to push the movable bottom plate (26) to lift, each outer sleeve (25) rises to a position that wraps each gas cylinder (3); A spiral air channel (251) is provided in each outer sleeve (25), and an air pump (28) and an air cavity (27) are fixed on the movable bottom plate (26). Each spiral air channel (251) is connected to the air outlet of the air pump (28) through the cavity in the movable bottom plate (26), or each spiral air channel (251) is directly connected to the air outlet of the air pump (28) through the air channel. The air inlet of the air pump (28) is connected to the air cavity (27), and an air inlet with a one-way valve is provided on the shell of the air cavity (27). A refrigeration component is provided in the air cavity (27), and the gas sucked into the cavity of the air cavity (27) is cooled and discharged into each spiral air channel (251) through the air pump (28). The air outlet of each spiral air channel (251) is provided on the outer wall of the outer sleeve (25) near the top; The air outlet position of each spiral air channel (251) is respectively provided with a regulating air port (252), and any regulating air port (252) includes a regulating air channel (2521) that runs through the inside and outside of the outer sleeve (25), the regulating air channel (2521) is communicated with the spiral air channel (251), and a regulating air core (2522) is slidably connected in the regulating air channel (2521), and a spring is connected to the regulating air core (2522) near the outside of the outer sleeve (25); When the gas cylinder (3) in the outer sleeve (25) does not leak, the regulating gas core (2522) is pushed to the inner side of the regulating gas channel (2521) by the spring. At this time, the spiral gas channel (251) is connected to the outside through the regulating gas channel (2521), so that the cold air in the air cavity (27) is discharged into the spiral gas channel (251) through the air pump (28) and discharged through the outside of the regulating gas channel (2521); when the gas cylinder (3) in the outer sleeve (25) leaks, the regulating gas core (2522) is pushed outward by the air pressure in the outer sleeve (25). At this time, the spiral gas channel (251) is connected to the inner cavity of the outer sleeve (25) through the regulating gas channel (2521), so that the chemical gas leaked from the outer sleeve (25) is sucked into the air cavity (27) through the regulating gas channel (2521) through the air pump (28). When the temperature in the air cavity (27) rises due to the filling of gas, it can be cooled by the refrigeration component.

2. The inflator for a small gas cylinder according to claim 1, characterized in that: A sleeve (41) is provided below the upper fixing platform (4) at a position outside each connector (54), and the inner wall of each sleeve (41) is fitted on the outer wall of the top of the corresponding outer sleeve (25). The upper fixing platform (4) is provided with an air-deflation closing valve mechanism at a position inside the sleeve (41), which is used to close the corresponding branch pipe (52) when air is deflated. The lifting fixture (2) is provided with an air-deflation locking mechanism at a position inside the outer sleeve (25), which is used to lock the lifting fixture (2) when air is deflated, thereby preventing the outer sleeve (25) from being manually opened when air is deflated.

3. The inflator for a small gas cylinder according to claim 2, characterized in that: The air release valve closing mechanism includes a gas pressure sensor disposed in the sleeve (41) and an automatic stop valve (53) disposed on the branch pipe (52), and when the pressure sensor detects a pressure increase, the automatic stop valve (53) is controlled to close the branch pipe (52); Alternatively, the air leakage valve closing mechanism includes a stop valve arranged on the branch pipe (52), the sleeve (41) is connected to the stop valve through a ventilation channel, and the pressure generated by the leakage pushes the valve core to move to the position of closing the stop valve.

4. The inflator for a small gas cylinder according to claim 3, characterized in that: The deflation locking mechanism includes a pressure sensor arranged in the outer sleeve (25) and an electromagnetic locking device (29) arranged on the side of the jacking fixture (2); a side baffle (13) is arranged on the side of the jacking fixture (2) in the filling platform (1); and positioning holes (131) are arranged in an array on the side baffle (13). When the pressure sensor in the outer sleeve (25) detects an increase in pressure, the locking tongue of the locking device (29) is controlled to pop out and be stuck in the positioning hole (131), thereby locking the jacking fixture (2) in a fixed position; Alternatively, the air-deflation locking mechanism includes a mechanical pressure-type locking device (29) arranged on the side of the jacking and fixing device (2), a through hole is provided on the elastic support plate (22) to connect the inner cavity of the outer sleeve (25) with the bottom column (24), and a ventilation channel is provided in the bottom column (24), one end of the ventilation channel is connected to the inner cavity of the outer sleeve (25), and the other end is connected to the locking device (29), and the pressure generated by the leakage pushes the lock tongue of the locking device (29) to move to a position inserted into the positioning hole (131).

5. The inflator for a small gas cylinder according to claim 4, characterized in that: The filling station (1) includes a frame (11), the guide rod (15) is arranged on the top of the frame (11), a lower support plate (12) is provided near the bottom of the frame (11), the external cylinder (14) is fixed on the lower support plate (12), the lower support plate (12) is provided with a through hole at a position corresponding to the built-in cylinder (23), and the side baffle (13) is fixed above the lower support plate (12).

6. The inflator for a small gas cylinder according to claim 4, characterized in that: The lower end of the connector (54) is provided with an external thread section, and the bottle mouth of the gas cylinder (3) is provided with an internal thread interface adapted to the external thread section; an axially through-going gas filling passage is provided inside the connector (54), and the gas filling passage is communicated with the passage in the branch pipe (52); an annular sealing gasket is embedded in the opening of the lower end of the gas filling passage, and when the connector (54) is screwed into the internal thread interface of the gas cylinder (3) through a thread, the annular sealing gasket forms a sealing fit with the bottle mouth end face of the gas cylinder (3); An axially movable push rod is provided in the inflation channel, the upper end of the push rod is elastically connected to the top of the inflation channel through a spring, and the lower end extends to below the annular sealing gasket; When the connector (54) is completely connected to the gas cylinder (3), the lower end of the push rod abuts against the valve core of the cylinder valve in the gas cylinder (3) and pushes it open, so that the inflation channel is connected to the interior of the gas cylinder (3); when the connector (54) is rotated out, the push rod is reset under the action of the spring, and the valve core of the cylinder valve in the gas cylinder (3) is closed under the action of its own spring force.

7. The inflation device for a small gas cylinder according to claim 4, characterized in that: The electromagnetic locking device (29) comprises a lock tongue, a return spring and an electromagnetic coil. A wedge-shaped guide surface is provided at the end of the lock tongue. The positioning hole (131) is a tapered hole adapted to the wedge-shaped guide surface. When the electromagnetic coil is energized, the lock tongue extends. When the electromagnetic coil is de-energized, the return spring pushes the lock tongue to retract.

8. The inflation device for a small gas cylinder according to claim 4, characterized in that: A control panel is provided on the side of the filling station (1), and the control panel includes a PLC controller, a display screen, and control buttons. The PLC controller is electrically connected to the external cylinder (14), the internal cylinder (23), the air pump (28), the refrigeration component, and the automatic shut-off valve (53), respectively. The display screen is used to display the filling pressure of each gas cylinder (3), the temperature in the gas cavity (27), and the working status of the system.

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