Gas cylinder filling device

Abstract

The invention relates to a gas cylinder filling device which is used for being connected with a liquefied gas groove and can be filled with fluid. The gas cylinder filling device is provided with a supporting seat, a main valve, a plurality of split charging pipelines and a plurality of connecting seats. The main valve and the split charging pipelines are arranged on the supporting seat, and the connecting seats are assembled and connected to the split charging pipelines. The main valve is provided with a main valve pipeline, and all the split charging pipelines are connected to the main valve pipeline. Each connecting seat is provided with a connecting pipeline, and each connecting pipeline is connected to each split charging pipeline. According to the invention, fluid can simultaneously flow into the split charging pipeline and the connecting pipeline from the main valve pipeline. Therefore, by using the gas cylinder filling device, the single filling amount can be increased under the condition of spending the same manpower and flow.

Description

Technical Field

[0001] This invention relates to a filling device, and more particularly to a gas cylinder filling device capable of filling gas cylinders with fluid. Background Technology

[0002] Existing small-capacity gas cylinders can be broadly categorized into two types: disposable small-capacity gas cylinders and refillable small-capacity gas cylinders. To avoid excessive material waste and environmental problems caused by discarding disposable small-capacity gas cylinders, they are smaller and lighter, making them more convenient for users to carry and primarily used for outdoor activities. Furthermore, for users with low gas consumption, they do not need to purchase large quantities of gas at once, reducing the cost of each purchase.

[0003] With increasing emphasis on environmental issues in recent years, the material waste caused by disposable small-capacity gas cylinders has attracted much attention. According to statistics, approximately 60 million disposable small-capacity gas cylinders are discarded annually in the United States. Furthermore, it is difficult to determine from the appearance whether there is residual gas inside disposable small-capacity gas cylinders. If disposable small-capacity gas cylinders containing gas are disposed of in landfills, they can easily lead to safety problems such as fires or explosions and increase recycling risks. In California, only one-quarter of the gas cylinders sold are recycled. The government spends three million dollars annually on hazardous waste management. Therefore, refillable small-capacity gas cylinders have emerged on the market, and some countries are gradually promoting their use. The California legislature passed a law banning the sale of disposable small-capacity gas cylinders, which will take effect in 2028. The bill is still under review in the California legislature. Although refillable small-capacity gas cylinders are more expensive than disposable ones, in the long run, they offer the advantages of being both environmentally friendly and produced in smaller quantities.

[0004] However, there is a risk of gas leakage if consumers refill small-capacity refillable gas cylinders themselves. For safety reasons, most consumers are unwilling to do so. For gas stations, the manpower and procedures required for each refill are the same, but the price is directly proportional to the amount of gas filled. Therefore, the cost of refilling small-capacity refillable gas cylinders is high for both consumers and gas stations, thus reducing their willingness to use these cylinders. Summary of the Invention

[0005] To address the high cost of single-filling of gas into small-capacity gas cylinders, this invention proposes a gas cylinder filling device that connects to a gas source and can simultaneously fill multiple containers with a fluid.

[0006] The gas cylinder filling device proposed in this invention has the following features:

[0007] One support base;

[0008] A main valve is mounted on the support base, and the main valve has:

[0009] An air inlet is provided for connecting to the air source, and the fluid flows from the air source into the air inlet.

[0010] A main valve pipe, which is connected to the air inlet; and

[0011] A main valve switch that can block or connect the air inlet and the main valve pipeline;

[0012] Multiple sub-pipelines are mounted on the support and connected to the main valve pipeline; and

[0013] Multiple connectors, each connector being disposed and connected to each of the respective distribution pipes; each connector having:

[0014] A connecting pipe, which is connected to one of the sub-containment pipes.

[0015] The advantage of this invention is that the gas cylinder filling device has a main valve pipe, multiple dispensing pipes, and multiple connecting seats. All dispensing pipes are connected to the main valve pipe, allowing fluid to simultaneously flow from the main valve pipe into the dispensing pipes. Therefore, using this gas cylinder filling device can increase the amount of gas filled per batch with the same manpower and process, thereby increasing consumers' willingness to purchase refillable small-capacity gas cylinders and gas stations' willingness to fill gas into these cylinders.

[0016] According to the aforementioned gas cylinder filling device, the gas cylinder filling device has:

[0017] Multiple gas cylinders, each gas cylinder being detachably mounted on its respective connector, and each gas cylinder having:

[0018] A gas cylinder valve is provided at the mouth of the gas cylinder and is detachably provided at the connecting seat; when the gas cylinder valve is provided at the connecting seat, the gas cylinder valve can connect the connecting pipe and the interior of the gas cylinder.

[0019] According to the aforementioned gas cylinder filling device, wherein:

[0020] Each of these connectors has:

[0021] A valve stem, disposed in the connecting pipe; the valve stem having:

[0022] A hollow pipe is inserted through the valve stem, making the valve stem a hollow rod body; and

[0023] At least one connecting hole is formed in the valve stem and penetrates the wall of the valve stem; the connecting hole connects the connecting pipe and the hollow pipe;

[0024] A connecting elastic element pushes against the valve stem;

[0025] Each of these gas cylinder valves has:

[0026] A gas cylinder pipeline passes through the gas cylinder valve and connects the connecting pipeline to the interior of the gas cylinder;

[0027] A gas cylinder moving part is movably installed through the gas cylinder pipeline and can block the connecting pipeline and the interior of the gas cylinder;

[0028] A gas cylinder elastic member, which tends to move the gas cylinder moving member to the outside of the gas cylinder and tends to block the inside and outside of the gas cylinder.

[0029] When each gas cylinder valve is installed in each of the connecting seats, the connecting elastic member pushes against the valve stem, and the valve stem pushes against the gas cylinder moving member, thereby causing the gas cylinder moving member to resist the gas cylinder elastic member and move, and connect the connecting pipe and the interior of the gas cylinder.

[0030] According to the aforementioned gas cylinder filling device, wherein:

[0031] Each of these connectors has:

[0032] A locking groove is formed on the wall surface of the connecting seat; and

[0033] Each of these gas cylinder valves has:

[0034] A locking element protrudes from the outer wall of the gas cylinder valve; when the gas cylinder valve is mounted on the connecting seat, the locking element is located in one of the locking grooves.

[0035] According to the aforementioned gas cylinder filling device, each gas cylinder valve has:

[0036] A row of liquid tubing extends from the cylinder valve into the interior of the cylinder;

[0037] A drain hole that connects the drain pipe to the outside of the gas cylinder;

[0038] A pressure relief plug is inserted into the drain hole and can selectively block or connect the drain pipe and the drain hole.

[0039] According to the aforementioned gas cylinder filling device, the drain hole of each gas cylinder valve is formed in the locking member of the gas cylinder valve.

[0040] According to the aforementioned gas cylinder filling device, the gas cylinder filling device has a total of four connecting seats and four gas cylinders.

[0041] According to the aforementioned gas cylinder filling device, the air inlet of the main valve has:

[0042] A main valve moving component is disposed within the air inlet and can block the air inlet and the main valve pipeline; when the air source is connected to the air inlet, the air source pushes the main valve moving component, thereby connecting the air inlet and the main valve pipeline; and

[0043] A main valve elastic element is disposed in the air inlet. The main valve elastic element pushes against the main valve moving element and causes the main valve moving element to tend to block the air source and the main valve pipeline.

[0044] According to the aforementioned gas cylinder filling device, the main valve switch of the main valve has the following characteristics:

[0045] A main seal is disposed between the air inlet and the main valve pipeline, and is capable of blocking or connecting the air inlet and the main valve pipeline; and

[0046] A main drive unit that can move the main seal and cause the main seal to block or connect the air inlet and the main valve pipeline.

[0047] According to the aforementioned gas cylinder filling device, the support base has:

[0048] A base;

[0049] A top cover is disposed above the base, and the main valve and the plurality of connecting seats are disposed on the top cover;

[0050] At least one support column is disposed between the base and the top cover, and is capable of supporting the top cover; and

[0051] One handle, which is formed on the top cover. Attached Figure Description

[0052] Figure 1 This is a perspective view of the installation of a gas cylinder according to the first embodiment of the present invention.

[0053] Figure 2 This is a perspective view of the first embodiment of the present invention without the gas cylinder installed.

[0054] Figure 3 This is a cross-sectional view of the first embodiment of the present invention with the gas cylinder installed.

[0055] Figure 4 This is a partial cross-sectional view of the first embodiment of the present invention with the gas cylinder installed.

[0056] Figure 5 This is a partial cross-sectional schematic diagram of the gas cylinder valve according to the first embodiment of the present invention.

[0057] Figure 6This is a partial cross-sectional schematic diagram of the first embodiment of the present invention.

[0058] Figure 7 This is a partial three-dimensional schematic diagram of the first embodiment of the present invention.

[0059] Figure 8 This is a three-dimensional schematic diagram of the second embodiment of the present invention with the gas cylinder installed.

[0060] Figure 9 This is a three-dimensional schematic diagram of the installation of a gas cylinder according to the third embodiment of the present invention.

[0061] Explanation of key component symbols:

[0062] 10. Support base; 11. Base; 12. Top cover; 13. Column; 14. Handle; 20. Main valve; 21. Air inlet; 211. Main valve moving part; 212. Main valve elastic part; 22. Main valve pipeline; 23. Main valve switch; 231. Thread; 232. Main seal; 233. Main drive; 30. Sub-assembly pipeline; 40. Connecting seat; 41. Connecting pipeline; 42. Valve stem; 421. Hollow pipeline; 422. Connecting hole; 43. Connecting elastic part; 44. Engaging groove; 441. Engaging port; 442. First section; 443. Second section; 50. Gas cylinder; 51. Gas cylinder valve; 52. Gas cylinder pipeline; 53. Gas cylinder moving part; 54. Gas cylinder elastic part; 55. Drain pipe; 56. Drain hole; 57. Pressure relief plug; 58. Engaging part. Detailed Implementation

[0063] The following, in conjunction with the accompanying drawings and preferred embodiments of the present invention, further illustrates the technical means employed by the present invention to achieve its intended purpose.

[0064] Please refer to Figure 1 and Figure 2 This invention proposes a gas cylinder filling device for connecting to a gas source (not shown) and simultaneously filling a fluid into multiple containers. The gas cylinder filling device includes a support base 10, a main valve 20, multiple dispensing pipes 30, multiple connecting seats 40, and multiple gas cylinders 50.

[0065] The support base 10 has a base 11, a top cover 12, at least one support column 13, and a handle 14. The support column 13 is disposed between the base 11 and the top cover 12 and supports the top cover 12, positioning the top cover 12 above the base 11. In a first embodiment, the support base 10 has four support columns 13, arranged around the edges of the base 11 and the top cover 12. In other embodiments, the support base 10 may have one support column 13, located at the center of the base 11 and the top cover 12, but is not limited thereto. The handle 14 is formed on the top cover 12, and in the first embodiment, the handle 14 and the top cover 12 are integrally formed. In other embodiments, the handle 14 may pass through the edge of the top cover 12 and be rotatable relative to the top cover 12, but is not limited thereto.

[0066] Please refer to Figure 1 , Figure 3 and Figure 6 The main valve 20 is located above the top cover 12 of the support base 10 and has an air inlet 21, a main valve pipe 22, and a main valve switch 23. The air inlet 21 is used to connect to an air source, and fluid flows from the air source into the air inlet 21. The main valve pipe 22 passes through the top cover 12 of the support base 10 and is connected to the air inlet 21. A main valve moving member 211 and a main valve elastic member 212 are disposed in the air inlet 21. The main valve elastic member 212 pushes against the main valve moving member 211 and tends to move the main valve moving member 211 away from the main valve pipe 22, thereby blocking the air source and the main valve pipe 22. When the air source is connected to the air inlet 21, the air source pushes the main valve moving member 211 against the main valve elastic member 212 and moves it, so that the air source and the main valve pipe 22 can be connected.

[0067] The main valve switch 23 has a thread 231, a main seal 232, and a main drive 233. The main valve switch 23 is threaded onto the top of the main valve 20. The main seal 232 is movably disposed between the air inlet 21 and the main valve pipe 22, and can block or connect the air inlet 21 and the main valve pipe 22. The main drive 233 is connected to the main seal 232 and can drive the main seal 232. In the first embodiment, by rotating the main drive 233 through the thread 231 of the main valve switch 23, the main seal 232 moves along the main valve pipe 22, thereby blocking or connecting the air inlet 21 and the main valve pipe 22.

[0068] Please refer to Figure 2 , Figure 3 and Figure 7A dispensing pipe 30 is disposed below the top cover 12 of the support base 10 and connected to the main valve pipe 22. Specifically, the dispensing pipe 30 is formed in a dispensing seat 31, which is disposed below the top cover 12 of the support base 10. In the first embodiment, the main valve 20 is screwed onto the dispensing seat 31 and is disposed on the support base 10 through the dispensing seat 31. The main valve pipe 22 passes through the dispensing seat 31 and connects to the dispensing pipe 30. In the first embodiment, there are a total of four dispensing pipes 30, and one end of each dispensing pipe 30 is connected to the main valve pipe 22. The dispensing pipes 30 and the main valve pipe 22 are integrally formed, but are not limited thereto.

[0069] Please refer to Figure 3 , Figure 4 and Figure 7 Each connecting seat 40 is disposed and connected to the end of each dispensing pipe 30 away from the main valve pipe 22. In the first embodiment, there are four connecting seats 40, and each of the four connecting seats 40 corresponds one-to-one with one of the four dispensing pipes 30. The connecting seat 40 has a connecting pipe 41, a valve stem 42, a connecting elastic element 43, and a locking groove 44. The connecting pipe 41 passes through the connecting seat 40 and is connected to the dispensing pipe 30. The valve stem 42 is disposed in the connecting pipe 41 and is movable relative to the connecting pipe 41. The valve stem 42 has a hollow pipe 421 and at least one connecting hole 422. The hollow pipe 421 passes through the valve stem 42, making the valve stem 42 a hollow rod body. The connecting hole 422 is formed in the valve stem 42 and passes through the wall surface of the valve stem 42. The connecting pipe 41 and the hollow pipe 421 are connected through the connecting hole 422. In the first embodiment, there are three connection holes 422, two of which are located at the end of the valve stem 42 near the dispensing pipe 30, and the other connection hole 422 is located at the end of the valve stem 42 away from the dispensing pipe 30. The connecting elastic member 43 pushes against the valve stem 42 and tends to move the valve stem 42 away from the dispensing pipe 30, thereby blocking the connection pipe 41.

[0070] A locking groove 44 is formed on the wall surface of the connector 40. In the first embodiment, the locking groove 44 penetrates the wall surface of the connector 40 and is close to the outer side of the support 10. The locking groove 44 has a locking opening 441, a first segment 442, and a second segment 443. The locking opening 441 is formed at the lower edge of the connector 40, one end of the first segment 442 is connected to the locking opening 441, and the other end of the first segment 442 is connected to the second segment 443. An included angle is formed between the first segment 442 and the second segment 443. In the first embodiment, the first segment 442 is parallel to the connecting pipe 41 of the connector 40, and the second segment 443 is perpendicular to the connecting pipe 41 of the connector 40. In other words, the included angle between the first segment 442 and the second segment 443 is 90 degrees.

[0071] Please refer to Figures 3 to 5 and Figure 7Each gas cylinder 50 is detachably mounted on each connecting seat 40, and each gas cylinder 50 has a gas cylinder valve 51. In the first embodiment, there are four gas cylinders 50, and each of the four gas cylinders 50 corresponds one-to-one with the four connecting seats 40. The gas cylinder 50 is a container that can be refilled with fluid, and in the first embodiment, it is a small-capacity refillable gas cylinder. The gas cylinder valve 51 is located at the top opening of the gas cylinder 50, and the gas cylinder 50 is connected to the connecting seat 40 through the gas cylinder valve 51. When the gas cylinder valve 51 is connected to the connecting seat 40, the gas cylinder valve 51 can connect the connecting pipe 41 and the interior of the gas cylinder 50. The gas cylinder valve 51 has a gas cylinder pipe 52, a gas cylinder moving part 53, a gas cylinder elastic part 54, a drain pipe 55, a drain hole 56, a pressure relief plug 57, and a locking part 58.

[0072] A gas cylinder pipe 52 extends through the gas cylinder valve 51 and connects the interior of the connecting pipe 41 and the gas cylinder 50. A gas cylinder moving member 53 is movably disposed within the gas cylinder pipe 52 and blocks the interior of the connecting pipe 41 and the gas cylinder 50. A gas cylinder elastic member 54 pushes against the gas cylinder moving member 53 and tends to move the gas cylinder moving member 53 to the outside of the gas cylinder 50, thereby blocking the interior and exterior of the gas cylinder 50.

[0073] When the gas cylinder valve 51 is installed on the connecting seat 40, the connecting elastic member 43 pushes against the valve stem 42, and the gas cylinder elastic member 54 pushes against the gas cylinder moving member 53, causing the valve stem 42 and the gas cylinder moving member 53 to push against each other. In this way, the valve stem 42 moves against the connecting elastic member 43, and the gas cylinder moving member 53 moves against the gas cylinder elastic member 54, thereby connecting the connecting pipe 41 and the interior of the gas cylinder 50. In the first embodiment, the elastic coefficient of the connecting elastic member 43 is greater than that of the gas cylinder elastic member 54, therefore the degree of movement of the gas cylinder moving member 53 is greater than the degree of movement of the valve stem 42, but this is not a limitation.

[0074] A drain pipe 55 extends from the cylinder valve 51 into the interior of the cylinder 50, while a drain hole 56 connects the drain pipe 55 and the exterior of the cylinder 50. A pressure relief plug 57 is movably inserted through the drain hole 56 and can selectively block or connect the drain pipe 55 and the drain hole 56. In the first embodiment, the pressure relief plug 57 is a screw and is screwed into the drain hole 56. The user can rotate the pressure relief plug 57 to move it relative to the drain hole 56, thereby blocking or connecting the drain pipe 55 and the drain hole 56. A locking member 58 protrudes from the outer wall surface of the cylinder valve 51. When the cylinder valve 51 is mounted on the connecting seat 40, the locking member 58 is located in one of the locking grooves 44. Specifically, the locking member 58 sequentially passes through the locking opening 441 and the first section 442 of the locking groove 44 and is inserted into the second section 443 of the locking groove 44. In the first embodiment, the drain hole 56 is formed in the engaging member 58. Therefore, when the gas cylinder valve 51 is disposed on the connecting seat 40, the pressure relief plug 57 located in the drain hole 56 is not blocked by the connecting seat 40.

[0075] Please refer to Figure 8 The gas cylinder filling device of the second embodiment is similar to that of the first embodiment. The difference is that the support base 10 of the second embodiment has two handles 14. The two handles 14 are respectively disposed on opposite sides of the top cover 12.

[0076] Please refer to Figure 9 The gas cylinder filling device of the third embodiment is similar to that of the second embodiment. The difference is that the third embodiment has twelve connecting seats 40 and twelve gas cylinders 50, thereby allowing the user to fill more gas cylinders 50 simultaneously. Another difference is that the support base 10 may not have a top cover 12. The handle 14 is located on top of the support column 13. The dispensing pipe 30 is located below the main valve 20 and connects the main valve 20 and each connecting seat 40.

[0077] In other embodiments, the number of dispensing pipes 30, the number of connecting seats 40, and the number of gas cylinders 50 are not limited to these; that is, the number of dispensing pipes 30, the number of connecting seats 40, and the number of gas cylinders 50 can be set according to filling requirements.

[0078] Please refer to Figures 1 to 3 When a user wishes to simultaneously fill four gas cylinders 50 with fluid from a gas source, the four gas cylinders 50 are first installed onto the four connectors 40 respectively. Specifically, as follows... Figure 3 , Figure 4 and Figure 7As shown, the engaging member 58 of the gas cylinder valve 51 is aligned with the engaging opening 441 of the engaging groove 44 of the connecting seat 40, and the engaging member 58 moves through the first section 442 of the engaging groove 44 to the second section 443 of the engaging groove 44. Next, the air inlet 21 of the main valve 20 is connected to the gas source. The gas source can push the main valve moving member 211 against the main valve elastic member 212 and move, thereby connecting the air inlet 21. Then, the pressure relief plug 57 of one of the gas cylinder valves 51 is rotated, allowing the interior of the gas cylinder 50 to be connected through the drain pipe 55 and drain hole 56. Finally, the main drive member 233 is rotated to move the main seal 232 along the main valve pipe 22, thereby connecting the gas source, the air inlet 21, and the main valve pipe 22, and fluid filling begins.

[0079] Please refer to Figure 3 , Figure 4 and Figure 6 During the filling process, fluid flows from the gas source through the air inlet 21 and the main valve pipe 22, and then into the four dispensing pipes 30. Next, it flows from the dispensing pipes 30 into the connecting pipe 41, and through the hollow pipe 421 and connecting hole 422 of the valve stem 42. Finally, it enters the gas cylinder 50 through the gas cylinder valve 51's gas cylinder 50 pipe. When the fluid level in the gas cylinder 50 reaches the drain pipe 55, the fluid overflows from the drain hole 56 through the drain pipe 55, indicating that all four gas cylinders 50 are filled. In this embodiment, when the gas cylinder 50 reaches 80% of its filling capacity, fluid will overflow from the drain hole 56. At this time, the main valve 20 must be closed immediately to stop filling. Simultaneously, the pressure relief plug 57 must be immediately closed to block the drain pipe 55 and drain hole 56 to prevent fluid leakage from the gas cylinder 50.

[0080] When the gas cylinder 50 is filled, the user first rotates the main drive component 233 to move the main seal component 232 along the main valve pipe 22, thereby blocking the air inlet 21 and the main valve pipe 22. Then, the gas source and air inlet 21 are disconnected. The main valve elastic component 212 pushes against and moves the main valve moving component 211 to block the air inlet 21. Subsequently, the pressure relief plug 57 of the gas cylinder valve 51 blocks the drain pipe 55 and drain hole 56, and the four gas cylinders 50 are detached from the four connecting seats 40 respectively. Specifically, as follows... Figure 3 , Figure 4 and Figure 7 As shown, the user rotates the cylinder valve 51, causing the engaging member 58 to pass through the second section 443 of the engaging groove 44 and reach the first section 442 of the engaging groove 44. Then, the engaging member 58 passes through the first section 442 of the engaging groove 44 and moves out of the engaging hole. When the cylinder 50 separates from the connecting seat 40, the connecting elastic member 43 pushes against and moves the valve stem 42, while the cylinder elastic member 54 pushes against and moves the cylinder moving member 53. In this way, the valve stem 42 blocks the connecting pipe 41, and the cylinder moving member 53 blocks the interior and exterior of the cylinder 50.

[0081] The advantage of this invention is that the gas cylinder filling device has a main valve pipe 22, multiple dispensing pipes 30, and multiple connecting seats 40. All dispensing pipes 30 are connected to the main valve pipe 22, allowing fluid to simultaneously flow from the main valve pipe 22 into the dispensing pipes 30. Therefore, using this gas cylinder filling device can increase the amount of gas filled per cycle with the same manpower and process, thereby increasing consumers' willingness to purchase refillable small-capacity gas cylinders and gas stations' willingness to fill gas into these cylinders.

[0082] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A gas cylinder filling device, used to connect to a gas source and capable of filling a fluid; characterized in that, The gas cylinder filling device has the following features: One support base; A main valve is mounted on the support base, and the main valve has: An air inlet is used to connect to the air source; A main valve pipe, which is connected to the air inlet; and A main valve switch that can block or connect the air inlet and the main valve pipeline; Multiple sub-pipelines are mounted on the support and connected to the main valve pipeline; and Multiple connectors, each connector being disposed and connected to each of the respective distribution pipes; each connector having: A connecting pipe, which is connected to one of the sub-containment pipes.

2. The gas cylinder filling device according to claim 1, characterized in that, The gas cylinder filling device has the following features: Multiple gas cylinders, each gas cylinder being detachably mounted on its respective connector, and each gas cylinder having: A gas cylinder valve is provided at the mouth of the gas cylinder and is detachably provided at the connecting seat; when the gas cylinder valve is provided at the connecting seat, the gas cylinder valve can connect the connecting pipe and the interior of the gas cylinder.

3. The gas cylinder filling device according to claim 2, characterized in that: Each of these connectors has: A valve stem, disposed in the connecting pipe; the valve stem having: A hollow pipe is inserted through the valve stem, making the valve stem a hollow rod body; and At least one connecting hole is formed in the valve stem and penetrates the wall of the valve stem; the connecting hole connects the connecting pipe and the hollow pipe; A connecting elastic element pushes against the valve stem; Each of these gas cylinder valves has: A gas cylinder pipeline passes through the gas cylinder valve and connects the connecting pipeline to the interior of the gas cylinder; A gas cylinder moving part is movably installed through the gas cylinder pipeline and can block the connecting pipeline and the interior of the gas cylinder; A gas cylinder elastic member, which tends to move the gas cylinder moving member to the outside of the gas cylinder and tends to block the inside and outside of the gas cylinder. When each gas cylinder valve is installed in each of the connecting seats, the connecting elastic member pushes against the valve stem, and the valve stem pushes against the gas cylinder moving member, thereby causing the gas cylinder moving member to resist the gas cylinder elastic member and move, and connect the connecting pipe and the interior of the gas cylinder.

4. The gas cylinder filling device according to claim 2, characterized in that: Each of these connectors has: A locking groove is formed on the wall surface of the connecting seat; and Each of these gas cylinder valves has: A locking element protrudes from the outer wall of the gas cylinder valve; when the gas cylinder valve is mounted on the connecting seat, the locking element is located in one of the locking grooves.

5. The gas cylinder filling device according to claim 4, characterized in that, Each of these gas cylinder valves has: A row of liquid tubing extends from the cylinder valve into the interior of the cylinder. A drain hole that connects the drain pipe to the outside of the gas cylinder; A pressure relief plug is inserted into the drain hole and can selectively block or connect the drain pipe and the drain hole.

6. The gas cylinder filling device according to claim 5, characterized in that, The drain hole of each gas cylinder valve is formed in the engagement member of the gas cylinder valve.

7. The gas cylinder filling device according to any one of claims 2 to 6, characterized in that, The gas cylinder filling device has a total of four connecting seats and four gas cylinders.

8. The gas cylinder filling device according to any one of claims 1 to 6, characterized in that, The air inlet of the main valve has: A main valve moving component is disposed within the air inlet and can block the air inlet and the main valve pipeline; when the air source is connected to the air inlet, the air source pushes the main valve moving component, thereby connecting the air inlet and the main valve pipeline; and A main valve elastic element is disposed in the air inlet. The main valve elastic element pushes against the main valve moving element and causes the main valve moving element to tend to block the air source and the main valve pipeline.

9. The gas cylinder filling device according to claim 8, characterized in that, The main valve switch of the main valve has: A main seal is disposed between the air inlet and the main valve pipeline, and is capable of blocking or connecting the air inlet and the main valve pipeline; and A main drive unit that can move the main seal and cause the main seal to block or connect the air inlet and the main valve pipeline.

10. The gas cylinder filling device according to any one of claims 1 to 6, characterized in that, The support has: A base; A top cover is disposed above the base, and the main valve and the plurality of connecting seats are disposed on the top cover; At least one support column is disposed between the base and the top cover, and is capable of supporting the top cover; and One handle, which is formed on the top cover.

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