A refillable propane gas cylinder
By designing a refillable propane tank and utilizing a combination of valve system and injection head, the problem of non-reusable propane tanks has been solved, achieving cost reduction and environmental benefits, and providing reliable judgment of the full state.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN KAIMI TECHNOLOGY CO LTD
- Filing Date
- 2025-09-16
- Publication Date
- 2026-07-31
AI Technical Summary
Existing propane tanks cannot be reused, resulting in high operating costs and serious environmental problems.
A refillable propane tank was designed. Through the combined use of a valve system and an injection head, the propane tank can be detachably connected and sealed, allowing liquid propane to be injected and gas to be discharged. The overflow port indicates whether the tank is full.
It enables the reusability of propane tanks, reduces operating costs and environmental pressure, and prevents leaks by determining the fullness through overflow atomization.
Smart Images
Figure CN224580119U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gas cylinders, and in particular to a refillable propane gas cylinder. Background Technology
[0002] Most propane cylinders currently on the market are disposable and cannot be refilled with propane after use, thus greatly increasing the user's operating costs. Furthermore, the recycling of used propane cylinders is extremely difficult and environmentally unfriendly. Summary of the Invention
[0003] To overcome the shortcomings of existing technologies, this utility model provides a refillable propane gas cylinder, comprising: A propane tank having a receiving cavity and an installation opening, the receiving cavity being used to contain propane; The valve body is connected to the inner wall of the mounting opening; the valve body has an injection channel and a pressure relief channel, both of which are connected to the receiving cavity; the pressure relief channel has a first vent. A first sealing valve; the first sealing valve is used to seal the injection channel, and the first sealing valve is movable between a first open position and a first closed position; when the first sealing valve is in the first open position, the first sealing valve opens the injection channel; when the first sealing valve is in the first closed position, the first sealing valve seals the injection channel; A second sealing valve is used to seal the first air outlet; the second sealing valve is movable between a second open position and a second closed position; when the second sealing valve is in the second open position, the first air outlet is open; when the second sealing valve is in the second closed position, the second sealing valve seals the first air outlet. The injection head is detachably connected to the valve body. The injection head has an injection pipe, a pressure-reducing structure, and an overflow port. When the injection head is connected to the valve body, the injection pipe pushes the first sealing valve to a first open position to release the seal of the first sealing valve on the injection channel, so that the injection pipe is connected to the injection channel. The pressure-reducing structure pushes the second sealing valve to a second open position to release the seal of the second sealing valve on the first vent, so that the first vent is connected to the overflow port.
[0004] The beneficial effects of this utility model are as follows: This utility model provides a propane tank, comprising: a propane tank having a receiving cavity and an installation opening, the receiving cavity being used to receive propane; a valve body connected to the inner wall of the installation opening; the valve body having an injection channel and a pressure relief channel, both of which are connected to the receiving cavity; the pressure relief channel having a first vent; a first sealing valve; the first sealing valve being used to seal the injection channel, and the first sealing valve being movable between a first open position and a first closed position; when the first sealing valve is in the first open position, the first sealing valve opens the injection channel; when the first sealing valve is in the first closed position... When closed, the first sealing valve seals the injection channel; the second sealing valve seals the first vent; the second sealing valve is movable between a second open position and a second closed position; when the second sealing valve is in the second open position, the first vent opens; when the second sealing valve is in the second closed position, the second sealing valve seals the first vent; the injection head is detachably connected to the valve body; the injection head has an injection pipe, a pressure-relief structure, and an overflow port; when the injection head is connected to the valve body, the injection pipe pushes the first sealing valve to the first open position to release the seal of the first sealing valve on the injection channel, thereby allowing injection. The pipeline is connected to the injection channel; the top-pressure structure pushes the second sealing valve to the second open position to release the seal of the second sealing valve on the first gas outlet, so that the first gas outlet is connected to the overflow port. This allows the injection head to be connected to the valve body when the user needs to add propane to the propane tank, so that the injection pipeline pushes the first sealing valve to the first open position to release the seal of the first sealing valve on the injection channel, thus connecting the injection pipeline to the injection channel. This facilitates the injection of liquid propane into the propane tank through the injection pipeline of the injection head. Furthermore, the top-pressure structure pushes the second sealing valve to the second open position to release the seal of the second sealing valve on the first gas outlet, so that the first gas outlet is connected to the overflow port. The outlet and overflow port are connected, facilitating the discharge of gas from the propane tank through the first outlet and overflow port. When the propane tank is full, the propane overflows through the first outlet and overflow port, atomizing instantly upon overflow. Users can observe this atomization to determine if the tank is full. After the tank is full, the injection head can be detached from the valve body. The first sealing valve returns to the first closed position, sealing the injection channel. The second sealing valve returns to the second closed position, sealing the first outlet to prevent propane leakage through the injection channel and the first outlet. Furthermore, after the propane in the tank is depleted, it can be refilled through the injection pipe and channel, allowing the tank to be reused. Attached Figure Description
[0005] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0006] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0007] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 yes Figure 1 A magnified view of point P; Figure 3 This is an exploded view of the present invention; Figure 4 yes Figure 3 A magnified view of point R; Figure 5 yes Figure 3 A magnified view of point G; Figure 6 yes Figure 3 A magnified view of point E; Figure 7 It is a sectional view taken along the valve body. Figure 8 yes Figure 7 Enlarged view of point O; Figure 9 yes Figure 7 Enlarged view of point U; Figure 10 This is a cross-sectional view of the present invention; Figure 11 yes Figure 10 A magnified view of point A; Figure 12 yes Figure 10 A magnified view of point B; Figure 13 yes Figure 10 A magnified view of point C; Figure 14 yes Figure 10 A magnified view of point D; Figure 15 This is another sectional view taken along the valve body; Figure 16 yes Figure 15 A magnified view of point N; Figure 17 yes Figure 15 A magnified view of point K; Detailed Implementation Reference Figures 1-17A refillable propane gas tank, comprising: The propane tank 1 has a receiving cavity 11 and an installation opening 12, the receiving cavity 11 being used to receive propane; The valve body 2 is connected to the inner wall of the mounting opening 12; the valve body 2 has an injection channel 21 and a pressure relief channel 22, both of which are connected to the receiving cavity 11; the pressure relief channel 22 has a first air outlet 221. First sealing valve 3; First sealing valve 3 is used to seal injection channel 21. First sealing valve 3 can move between a first open position and a first closed position. When first sealing valve 3 is in the first open position, first sealing valve 3 opens injection channel 21. When first sealing valve 3 is in the first closed position, first sealing valve 3 seals injection channel 21. The second sealing valve 4 is used to seal the first air outlet 221; the second sealing valve 4 can move between a second open position and a second closed position; when the second sealing valve 4 is in the second open position, the first air outlet 221 is open; when the second sealing valve 4 is in the second closed position, the second sealing valve 4 seals the first air outlet 221. Injection head 5 is detachably connected to valve body 2. Injection head 5 has injection pipe 51, top pressure structure 52 and overflow port 53. When injection head 5 is connected to valve body 2, injection pipe 51 pushes first sealing valve 3 to first open position to release the seal of first sealing valve 3 on injection channel 21, so that injection pipe 51 is connected to injection channel 21. Top pressure structure 52 pushes second sealing valve 4 to second open position to release the seal of second sealing valve 4 on first vent 221, so that first vent 221 is connected to overflow port 53.
[0008] With the above structure, the propane tank 1 includes a receiving cavity 11 and an installation opening 12, the receiving cavity 11 being used to contain propane; a valve body 2, the valve body 2 being connected to the inner wall of the installation opening 12; the valve body 2 having an injection channel 21 and a pressure relief channel 22, both of which are connected to the receiving cavity 11; the pressure relief channel 22 having a first vent 221; and a first sealing valve 3; the first sealing valve 3 is used to seal the injection channel 21, and the first sealing valve 3 is movable between a first open position and a first closed position; when the first sealing valve 3 is in the first open position, the first sealing valve 3 will seal the injection channel 21. 1. Open; When the first sealing valve 3 is in the first closed position, the first sealing valve 3 seals the injection channel 21; Second sealing valve 4, the second sealing valve 4 is used to seal the first vent 221; the second sealing valve 4 can move between the second open position and the second closed position; When the second sealing valve 4 is in the second open position, the first vent 221 is open; When the second sealing valve 4 is in the second closed position, the second sealing valve 4 seals the first vent 221; Injection head 5, the injection head 5 is detachably connected to the valve body 2; The injection head 5 has an injection pipe 51, a pressure structure 52 and an overflow port 53, when the injection head 5 is connected to the valve body 2 The injection pipe 51 pushes the first sealing valve 3 to the first open position to release the seal of the first sealing valve 3 on the injection channel 21, so that the injection pipe 51 is connected to the injection channel 21; the top pressure structure 52 pushes the second sealing valve 4 to the second open position to release the seal of the second sealing valve 4 on the first vent 221, so that the first vent 221 is connected to the overflow port 53. This allows the injection head 5 to be connected to the valve body 2 when the user needs to add propane to the propane tank 1, so that the injection pipe 51 pushes the first sealing valve 3 to the first open position to release the seal of the first sealing valve 3 on the injection channel 21, so that the injection pipe 51 is connected to the injection channel 21. Channel 21 is connected, facilitating the injection of liquid propane into propane tank 1 via injection pipe 51 of injection head 5; and, top pressure structure 52 pushes second sealing valve 4 to second open position to release the seal of second sealing valve 4 on first outlet 221, so that first outlet 221 is connected to overflow port 53, facilitating the discharge of gas in propane tank 1 through first outlet 221 and overflow port 53; when propane tank 1 is full, propane in propane tank 1 will overflow through first outlet 221 and overflow port 53. Propane atomizes at the moment of overflowing from overflow port 53. Users can determine whether propane tank 1 is full by observing whether atomization occurs;After the propane tank 1 is filled, the injection head 5 can be detached from the valve body 2. The first sealing valve 3 returns to the first closed position, sealing the injection channel 21. The second sealing valve 4 returns to the second closed position, sealing the first vent 221 to prevent propane leakage from the propane tank 1 through the injection channel 21 and the first vent 221. Furthermore, after the propane in the propane tank is depleted, propane can be re-injected into the propane tank through the injection pipe and injection channel, making the propane tank reusable.
[0009] In this embodiment, a first elastic reset member 31 is also included, which is used to push the first sealing valve 3 back to the first closed position; a second elastic reset member 41 is also included, which is used to push the second sealing valve 4 back to the second closed position. With the above structure, after the propane tank 1 is filled, the injection head 5 can be detached from the valve body 2. The first elastic reset device pushes the first sealing valve 3 back to the first closed position, and the first sealing valve 3 seals the injection channel 21. The second elastic reset device pushes the second sealing valve 4 back to the second closed position, and the second sealing valve 4 seals the first vent 221, so as to prevent propane in the propane tank 1 from leaking through the injection channel 21 and the first vent 221.
[0010] This embodiment also includes a third sealing valve 6, which seals the overflow port 53. The third sealing valve 6 is movable between a third open position and a third closed position. When the third sealing valve 6 is in the third open position, it opens the overflow port 53; when the third sealing valve 6 is in the third closed position, it seals the overflow port 53. It also includes a triggering device 7 connected to the injection head 5. The triggering device 7 is movable between a triggering position and a non-triggering position. When the triggering device 7 moves to the triggering position, it pushes the third sealing valve 6 to the third open position to release the seal of the overflow port 53. Specifically, it also includes a third elastic reset member 71, which pushes the third sealing valve 6 to the third closed position when the triggering device 7 moves to the non-triggering position. With the above structure, when propane is injected into the propane tank 1, the triggering device 7 can be moved to the triggering position to open the overflow port 53 so that the first gas outlet 221 is connected to the overflow port 53, so that the gas in the propane tank 1 can be discharged through the first gas outlet 221 and the overflow port 53; when the propane tank 1 is full, the triggering device 7 can be moved to the non-triggering position so that the third elastic reset member 71 can be used to push the third sealing valve 6 to the third closed position.
[0011] In this embodiment, the top of both the first sealing valve 3 and the second sealing valve 4 is lower than the top of the valve body 2. This structure protects the first sealing valve 3 and the second sealing valve 4, preventing them from being opened during transportation and storage of the propane tank 1, thus greatly improving the safety of the propane tank 1.
[0012] In this embodiment, the valve body 2 is connected to the mounting opening 12 by a thread 10, and the valve body 2 and the mounting opening 12 are also fixedly connected by adhesive or a pin. Through this structure, the connection between the valve body 2 and the mounting opening 12 via the thread 10 is effectively achieved. Furthermore, the secondary fixing connection between the valve body 2 and the mounting opening 12 via adhesive or a pin further strengthens the connection between the valve body 2 and the propane tank 1, preventing the valve body 2 from detaching from the propane tank 1 and further enhancing the safety of the propane tank 1.
[0013] In this embodiment, the injection head 5 further includes a delivery pipe 8, which is connected to the injection pipe 51; it also includes a fourth sealing valve 9, which seals the delivery pipe 8 and is movable between a fourth open position and a fourth closed position. When the fourth sealing valve 9 is in the fourth open position, it opens the delivery pipe 8 to connect it to the injection pipe 51; when it is in the fourth closed position, it seals the delivery pipe 8 to disconnect it from the injection pipe 51. When the triggering device 7 moves to the triggering position, it pulls the fourth sealing valve 9 to the fourth open position to release the seal of the delivery pipe 8 and connect it to the injection pipe 51. It also includes a fourth elastic reset member 91, which pushes the fourth sealing valve 9 to the fourth closed position when the triggering device 7 moves to the non-triggering position. With the above structure, when propane is injected into the propane tank 1, the trigger device 7 can be moved to the trigger position to open the delivery pipe 8, so that the gas source connected to the delivery pipe 8 can be injected into the propane tank 1 through the delivery pipe 8, the liquid injection pipe 51, and the liquid injection channel 21. When the propane tank 1 is full, the trigger device 7 can be moved to the non-trigger position so that the fourth elastic reset member 91 can be used to push the fourth sealing valve 9 to the fourth closed position, so that the fourth sealing valve 9 seals the delivery pipe 8, thereby disconnecting the delivery pipe 8 from the liquid injection pipe 51 and stopping the filling of propane into the propane tank 1. The design is reasonable, and the trigger device 7 achieves the effect of filling and stopping at the same time, so as to accurately control the amount of propane filled into the propane tank 1, and can stop the filling of propane in the first time after filling, preventing excessive propane from overflowing from the overflow port 53, greatly avoiding the waste of propane and saving energy.
[0014] In this embodiment, a first extension pipe 23 is also included. The first extension pipe 23 is connected to and communicates with the pressure relief channel 22. A second vent 231 is provided on the side wall of the first extension pipe 23, and the second vent 231 communicates with the pressure relief channel 22. The first extension pipe 23 and the inner wall of the pressure relief channel 22 are detachably connected. With this structure, since the second vent 231 is located on the side wall of the first extension pipe 23, compared to having it located at the end, it prevents propane filling the propane tank 1 from splashing onto the second vent 231 and overflowing from the pressure relief channel 22 and overflow port 53, thus avoiding atomization and affecting the user's judgment of whether the propane tank 1 is full. Only when the propane level in the propane tank 1 reaches the position of the second vent 231 will the propane in the propane tank 1 enter the second vent 231 and overflow from the pressure relief channel 22 and overflow port 53, atomizing. The user can then determine that the propane tank 1 is full after observing the atomization phenomenon.
[0015] In this embodiment, the first sealing valve 3 includes a first valve body 32, a first valve core 33, and a first elastic sealing portion 34. The first valve body 32 has a first mounting channel 321 and a first injection port 322. The first valve core 33 can move within the first mounting channel 321 to a first open position or a first closed position. The first elastic sealing portion 34 is connected to the first valve core 33 and is used to seal the first injection port 322. When the first valve core 33 moves to the first closed position, the first elastic reset member 31 pulls the first elastic sealing portion 34 to the end that fits the first injection port 322. When the injection head 5 is connected to the valve body 2, the injection pipe 51 pushes the first valve core 33 to the first open position to release the seal of the first sealing portion on the first injection port 322, so that the injection pipe 51 communicates with the injection channel 21. The first valve body 32 is detachably connected to the inner wall of the injection channel 21. Specifically, the first valve housing 32 is detachably connected to the inner wall of the injection channel 21 via a thread 10. This structure effectively enables the setting of the first sealing valve 3. When the injection head 5 is connected to the valve body 2 and propane is injected into the propane tank 1, the injection pipe 51 pushes the first valve core 33 to the first open position, releasing the seal of the first sealing part on the first injection port 322, thus connecting the injection pipe 51 with the injection channel 21, allowing propane to be injected into the propane tank 1 via the injection pipe 51, the injection channel 21, and the first injection port 322. When the propane tank 1 is full, the injection head 5 can be detached from the valve body 2, and the first elastic reset member 31 pulls the first elastic sealing part 34 to the end that fits against the first injection port 322, sealing the first injection port 322 and preventing propane in the propane tank 1 from overflowing through the first injection port 322. When propane tank 1 is needed, the gas hose of the appliance can be inserted into the liquid injection channel 21, and the gas hose can push the first valve core 33 to the first open position to release the seal of the first sealing part on the first liquid injection port 322, so that the gas hose is connected to the liquid injection channel 21, so that the propane in propane tank 1 can be transported to the appliance through the gas hose. The appliance can be a flame torch or a gas stove, etc.
[0016] In this embodiment, the pressure relief channel 22 has a first stop inner wall 222, and the second sealing valve 4 includes a first push rod 42 and a second elastic sealing portion 43. The first push rod 42 is located inside the pressure relief channel 22 and has a first stop protrusion 421. The second elastic sealing portion 43 is disposed between the first stop inner wall 222 and the first stop protrusion 421. The first push rod 42 can move between a second open position and a second closed position. When the first push rod 42 moves to the second closed position, the first stop protrusion 421 and the first stop inner wall 222 squeeze the second elastic sealing portion 43 to make the first stop... The protrusion 421 and the second elastic sealing portion 43 squeeze and seal the pressure relief channel 22; one end of the second elastic reset member 41 abuts against the first extension pipe 23, and the other end of the second elastic reset member 41 abuts against the first stop protrusion 421. The second elastic reset member 41 is used to push the first push rod 42 to the second closed position; the top pressure structure 52 pushes the first push rod 42 to the second open position, so that the first stop protrusion 421 and the inner wall 222 of the first stop release the compression of the second elastic sealing portion 43, so as to release the seal of the second sealing valve 4 on the first air outlet 221, so as to connect the first air outlet 221 with the overflow port 53. Through the above structure, the setting of the second sealing valve 4 is effectively realized. When the injection head 5 is connected to the valve body 2, the top pressure structure 52 of the injection head 5 pushes the second push rod 63 to the second open position, so that the first stop protrusion 421 and the inner wall 222 of the first stop release the compression of the second elastic sealing part 43, thereby releasing the seal of the second sealing valve 4 on the first vent 221, so that the first vent 221 can communicate with the overflow port 53. When the injection head 5 is removed from the valve body 2, the second elastic reset member 41 is used to push the first push rod 42 to the second closed position, so that the first stop protrusion 421 and the inner wall 222 of the first stop compress the second elastic sealing part 43, thereby sealing and covering the pressure relief channel 22.
[0017] In this embodiment, the third sealing valve 6 includes a second valve housing 62, a second push rod 63, and a third elastic sealing portion 64. The second valve housing 62 is connected to the inner wall of the overflow port 53. The second valve housing 62 has a third vent 621, which communicates with the overflow port 53. The second push rod 63 is located inside the third vent 621 and can be moved to a third open position or a third closed position. The second push rod 63 has a second stop protrusion 631 and a third elastic sealing portion 64. 64 is located between the second stop protrusion 631 and the inner wall of the third outlet 621. When the second push rod 63 moves to the third closed position, the second stop protrusion 631 presses the third elastic sealing part 64 between the inner walls of the third outlet 621, so that the second stop protrusion 631 seals and covers the third outlet 621. When the triggering device 7 pushes the second push rod 63 to the third open position, the seal of the second stop protrusion 631 and the second elastic sealing part 43 on the third outlet 621 is released. Through the above structure, the setting of the third sealing valve 6 is effectively realized. The second push rod 63 can be moved to the third open position by the triggering device 7 to release the seal of the second stop protrusion 631 and the second elastic sealing part 43 on the third outlet 621, so that the gas in the propane tank 1 can be discharged through the pressure relief channel 22, the overflow port 53 and the third outlet 621 during the process of filling propane tank 1 with propane. After the propane tank 1 is filled, the triggering device 7 is moved to the non-triggering position. The third elastic reset member 71 pushes the second push rod 63 to the third closed position. The second stop protrusion 631 presses the third elastic sealing part 64 between the inner wall of the third gas outlet 621 so that the second stop protrusion 631 seals and covers the third gas outlet 621.
[0018] In this embodiment, the delivery pipe 8 includes a first channel 81 and a second channel 82. The second channel 82 has an inlet 821 at one end and an outlet 822 at the other end. The inlet 821, the second channel 82, the outlet 822, the first channel 81, and the injection pipe 51 are connected in sequence. The fourth sealing valve 9 includes a third valve body 92, a third push rod 93, and a fourth elastic sealing part 94. Both the injection head and the third valve body 92 have a second mounting channel 921. The third push rod 93 can move to a fourth open position or a fourth closed position within the second mounting channel 921. When the triggering device 7 moves to a non-triggering position, the fourth elastic reset member 91 pushes the third push rod 93 to move to the fourth closed position, so that the third push rod 93 pushes... The fourth elastic sealing portion 94 seals and covers the outlet 822, preventing the second channel 82 from communicating with the first channel 81 and the injection pipe 51. When the triggering device 7 moves to the triggering position, it pulls the third push rod 93 to the fourth open position, releasing the seal of the fourth elastic sealing portion 94 on the outlet 822 and allowing the second channel 82 to communicate with the first channel 81 and the injection pipe 51. The fourth sealing valve 9 also includes a fifth elastic sealing portion 95, which is sleeved on the third push rod 93 and located between the third push rod 93 and the inner wall of the second mounting channel 921. The fifth elastic sealing portion 95 seals the gap between the third push rod 93 and the inner wall of the second mounting channel 921. The end of the third push rod 93 has a first mounting groove 931, and the fourth elastic sealing portion 94 is located within the first mounting groove 931. With the above structure, the trigger device 7 can pull the third push rod 93 to move it between the fourth open position and the fourth closed position, thereby causing the fourth elastic sealing part 94 to open or close the outlet 822. The fifth elastic sealing part 95 can seal the gap between the third push rod 93 and the inner wall of the second mounting channel 921, preventing propane leakage from the gap between the third push rod 93 and the inner wall of the second mounting channel 921.
[0019] In this embodiment, the triggering device 7 is a pressure rod, which includes a first operating part 72, a first pulling part 73, and a first pressing part 74. The first operating part 72, the first pulling part 73, and the first pressing part 74 are connected in sequence. The first pulling part 73 is connected to the third push rod 93. The pressure rod also has a rotating part 75, which is located between the first pressing part 74 and the first pulling part 73. The rotating part 75 is rotatably connected to the injection head 5 so that the pressure rod can rotate between the triggered position and the non-triggered position. When the first operating part 72 of the pressure rod rotates to the triggered position, the first pulling part 73 pulls the third push rod 93 to move to the fourth open position to release the seal of the fourth elastic sealing part 94 on the outlet 822, so that the second channel 82 is connected to the first channel 81 and the injection pipe 51. The first pressing part 74 pushes the second push rod 63 to move to the third open position to release the seal of the second stop protrusion 631 and the second elastic sealing part 43 on the third air outlet 621. With the above structure, when the first operating part 72 of the pressure rod rotates to the trigger position, the first pulling part 73 pulls the third pushing rod 93 to the fourth open position to release the seal of the fourth elastic sealing part 94 on the outlet 822, so that the second channel 82 is connected to the first channel 81 and the liquid injection pipe 51. The first pressing part 74 pushes the second pushing rod 63 to the third open position to release the seal of the second stop protrusion 631 and the second elastic sealing part 43 on the third gas outlet 621. The pressure rod simultaneously opens the third gas outlet 621 and the outlet 822, making it easy for the user to quickly fill the propane tank 1 with propane. The operation is simple and convenient. After the propane tank 1 is filled, the triggering device 7 moves to the non-triggering position. The third elastic reset member 71 is used to push the third sealing valve 6 to the third closed position, and the fourth elastic reset member 91 is used to push the fourth sealing valve 9 to the fourth closed position to simultaneously seal the outlet 822 and the third gas outlet 621. Furthermore, during the reset process, the fourth elastic reset member 91 can drive the triggering device 7 to reset and move to the non-triggering position.
[0020] In this embodiment, the valve body 2 has a receiving groove 24, the bottom wall of which is recessed to form a limiting annular groove 241. The top end of the second sealing valve 4 is located within the limiting annular groove 241. The top pressure structure 52 is a raised annular top pressure structure 52 located within the limiting annular groove 241. With this structure, the annular top pressure structure 52 can rotate within the limiting annular groove 241. Rotating the annular top pressure structure 52 to any position will push the second sealing valve 4 open, making it convenient for the user to install the injection head 5 with the valve body 2 without needing to specifically check whether the top pressure structure 52 and the top end of the second sealing valve 4 are aligned.
[0021] In this embodiment, the injection channel 21 has a second stop inner wall 211 and also includes an annular guide portion 212. The guide portion 212 is disposed within the injection channel 21 and has a first opening 2121 that communicates with the injection channel 21. An elastic sealing ring 213 is provided between the guide portion 212 and the second stop inner wall 211. The injection pipe 51 can press against the first sealing valve 3 through the first opening 2121 and the elastic sealing ring 213. With the above structure, due to the guide portion 212, the injection pipe 51 can be easily guided into the injection channel 21 and aligned with the first sealing valve 3, so that the injection pipe 51 can accurately push and open the first sealing valve 3.
[0022] In this embodiment, the first extension pipe 23 has a third stop protrusion 232, which abuts against the end of the pressure relief channel 22. This structure facilitates user installation of the first extension pipe 23. In this embodiment, the injection head 5 is detachably connected to the valve body 2 via a thread 10. The injection head 5 includes a main housing 54, and an injection pipe 51 is detachably connected to the main housing 54. Specifically, the injection pipe 51 is detachably connected to the main housing 54 via a thread 10. Further, the valve body 2 has a fourth stop protrusion 25, which abuts against the end of the mounting opening 12. Even further, the first extension pipe 23 is detachably connected to the inner wall of the pressure relief channel 22 via a thread 10.
[0023] In this embodiment, the propane tank also has a third installation channel 1011, and an overpressure protection valve 1012 is provided in the third installation channel. When the gas pressure in the propane is too high, the overpressure protection valve will be opened by the gas in the propane tank so that the gas in the propane tank overflows through the overpressure protection valve, preventing the propane tank from exploding due to excessive internal gas pressure. The overpressure protection valve includes a fourth valve body 10121, a fourth push rod 10122, and a sixth elastic sealing portion 10123. The fourth valve body has a fourth mounting channel 10125, and the fourth push rod can move to a fifth open position or a fifth closed position through the fourth mounting channel. The second mounting channel has a mounting bottom wall 10126, and the mounting bottom wall has a gas passage 10127. The fourth push rod has a sealing protrusion 10128, and the sixth elastic sealing portion is located between the sealing protrusion and the mounting bottom wall. It also includes a fifth elastic reset member 10129, one end of which abuts against the fourth valve body, and the other end of which abuts against the sealing protrusion, so that the fifth elastic reset member presses the sealing protrusion and the sixth elastic sealing portion against the mounting bottom wall and covers the gas passage.
[0024] In this embodiment, the first, second, third, fourth, fifth, and sixth elastic sealing portions are all silicone elastic sealing portions. The elastic sealing ring is a silicone elastic sealing ring. The first, second, third, fourth, and fifth elastic reset members are all springs.
[0025] The above description provides one or more embodiments in conjunction with specific content, but it is not intended that the specific implementation of this utility model is limited to these descriptions. Any methods or structures that are similar to or identical to those of this utility model, or any technical deductions or substitutions made based on the concept of this utility model, should be considered within the scope of protection of this utility model.
Claims
1. A refillable propane gas cylinder characterized by, include: A propane tank (1) having a receiving cavity (11) and an installation opening (12), the receiving cavity (11) being used to receive propane; The valve body (2) is connected to the inner wall of the mounting opening (12); the valve body (2) has an injection channel (21) and a pressure relief channel (22), both of which are connected to the receiving cavity (11); the pressure relief channel (22) has a first air outlet (221). First sealing valve (3); the first sealing valve (3) is used to seal the injection channel (21), and the first sealing valve (3) can move between a first open position and a first closed position; when the first sealing valve (3) is in the first open position, the first sealing valve (3) opens the injection channel (21); when the first sealing valve (3) is in the first closed position, the first sealing valve (3) seals the injection channel (21); The second sealing valve (4) is used to seal the first air outlet (221); the second sealing valve (4) is movable between a second open position and a second closed position; when the second sealing valve (4) is in the second open position, the first air outlet (221) is open; when the second sealing valve (4) is in the second closed position, the second sealing valve (4) seals the first air outlet (221); Injection head (5), which is detachably connected to valve body (2); injection head (5) has injection pipe (51), top pressure structure (52) and overflow port (53). When injection head (5) is connected to valve body (2), injection pipe (51) pushes first sealing valve (3) to first open position to release the seal of first sealing valve (3) on injection channel (21) so that injection pipe (51) is connected to injection channel (21); top pressure structure (52) pushes second sealing valve (4) to second open position to release the seal of second sealing valve (4) on first vent (221) so that first vent (221) is connected to overflow port (53).
2. A refillable propane gas cylinder as defined in claim 1, wherein It also includes a first elastic reset member (31) for pushing the first sealing valve (3) back to the first closed position; it also includes a second elastic reset member (41) for pushing the second sealing valve (4) back to the second closed position; it also includes a third sealing valve (6) for sealing the overflow port (53); the third sealing valve (6) is movable between a third open position and a third closed position; when the third sealing valve (6) is in the third open position, the third sealing valve (6) opens the overflow port (53); when the third sealing valve (6) is in the third closed position, the third sealing valve (6) seals the overflow port (53).
3. A refillable propane gas cylinder as defined in claim 2, wherein, It also includes a triggering device (7), which is connected to the injection head (5). The triggering device (7) can move between a triggering position and a non-triggering position. When the triggering device (7) moves to the triggering position, the triggering device (7) pushes the third sealing valve (6) to the third open position to release the seal of the third sealing valve (6) on the overflow port (53). It also includes a third elastic reset member (71). When the triggering device (7) moves to the non-triggering position, the third elastic reset member (71) is used to push the third sealing valve (6) to the third closed position.
4. A refillable propane cylinder as defined in claim 1, wherein The top of the first sealing valve (3) and the top of the second sealing valve (4) are both lower than the top of the valve body (2); the valve body (2) and the mounting opening (12) are connected by threads (10), and the valve body (2) and the mounting opening (12) are fixedly connected by adhesive or pins (20).
5. A refillable propane gas cylinder as defined in claim 3, wherein The injection head (5) also includes a delivery pipe (8) connected to the injection pipe (51); it also includes a fourth sealing valve (9) for sealing the delivery pipe (8), which is movable between a fourth open position and a fourth closed position; when the fourth sealing valve (9) is in the fourth open position, it opens the delivery pipe (8) to connect it to the injection pipe (51); when the fourth sealing valve (9) is in the fourth closed position, it seals the delivery pipe (8) to prevent it from connecting to the injection pipe (51); when the triggering device (7) moves to the triggering position, it pulls the fourth sealing valve (9) to the fourth open position to release the seal of the fourth sealing valve (9) on the delivery pipe (8) so that the delivery pipe (8) is connected to the injection pipe (51).
6. A refillable propane gas cylinder as defined in claim 5, wherein, It also includes a fourth elastic reset member (91), which is used to push the fourth sealing valve (9) to the fourth closed position when the triggering device (7) moves to the non-triggering position.
7. A refillable propane gas cylinder as defined in claim 2, wherein It also includes a first extension pipe (23), which is connected to and communicates with the pressure relief channel (22). The side wall of the first extension pipe (23) is provided with a second air outlet (231), which communicates with the pressure relief channel (22). The first extension pipe (23) and the inner wall of the pressure relief channel (22) are detachably connected. The valve body (2) has a receiving groove (24), the bottom wall of which is recessed to form a limiting ring groove (241). The top of the second sealing valve (4) is located in the limiting ring groove (241). The top pressure structure (52) is a raised annular top pressure structure (5). 2) The annular top pressure structure (52) is located in the limiting ring groove (241); the injection channel (21) has a second stop inner wall (211) and also includes an annular guide portion (212). The guide portion (212) is located in the injection channel (21). The guide portion (212) has a first opening (2121). The first opening (2121) communicates with the injection channel (21). An elastic sealing ring (213) is provided between the guide portion (212) and the second stop inner wall (211). The injection pipe (51) can press against the first sealing valve (3) through the first opening (2121) and the elastic sealing ring (213).
8. A refillable propane gas cylinder as defined in claim 2, wherein, The first sealing valve (3) includes a first valve body (32), a first valve core (33), and a first elastic sealing portion (34). The first valve body (32) has a first mounting channel (321) and a first injection port (322). The first valve core (33) can move to a first open position or a first closed position within the first mounting channel (321). The first elastic sealing portion (34) is connected to the first valve core (33) and is used to seal the first injection port (322). When the first valve core (33) is closed, the valve core (33) can move to a first open position or a first closed position within the first mounting channel (321). 33) When moved to the first closed position, the first elastic reset member (31) pulls the first elastic sealing part (34) to the end that fits the first injection port (322); when the injection head (5) is connected to the valve body (2), the injection pipe (51) pushes the first valve core (33) to the first open position to release the seal of the first sealing part on the first injection port (322) so that the injection pipe (51) is connected to the injection channel (21); the first valve body (32) is detachably connected to the inner wall of the injection channel (21).
9. A refillable propane gas cylinder as defined in claim 7, wherein, The pressure relief channel (22) has a first stop inner wall (222). The second sealing valve (4) includes a first push rod (42) and a second elastic sealing part (43). The first push rod (42) is located in the pressure relief channel (22). The first push rod (42) has a first stop protrusion (421). The second elastic sealing part (43) is disposed between the first stop inner wall (222) and the first stop protrusion (421). The first push rod (42) can move between a second open position and a second closed position. When the first push rod (42) moves to the second closed position, the first stop protrusion (421) and the first stop inner wall (222) squeeze the second elastic sealing part (43) so that the first stop protrusion (421) (421) (421) (422) (421 ... 1) The second elastic sealing part (43) squeezes and seals the pressure relief channel (22); one end of the second elastic reset member (41) abuts against the first extension pipe (23), and the other end of the second elastic reset member (41) abuts against the first stop protrusion (421). The second elastic reset member (41) is used to push the first push rod (42) to the second closed position; the top pressure structure (52) pushes the first push rod (42) to the second open position so that the first stop protrusion (421) and the inner wall of the first stop (222) release the compression of the second elastic sealing part (43) so as to release the seal of the second sealing valve (4) on the first air outlet (221) so as to connect the first air outlet (221) with the overflow port (53).
10. A refillable propane gas cylinder as defined in claim 6, wherein The third sealing valve (6) includes a second valve housing (62), a second push rod (63), and a third elastic sealing portion (64). The second valve housing (62) is connected to the inner wall of the overflow port (53). The second valve housing (62) has a third air outlet (621), which communicates with the overflow port (53). The second push rod (63) is located inside the third air outlet (621) and can be moved to a third open position or a third closed position. The second push rod (63) has a second stop protrusion (631), and the third elastic sealing portion (64) is located between the second stop protrusion (631) and the... Between the inner walls of the third air outlet (621), when the second push rod (63) moves to the third closed position, the second stop protrusion (631) presses the third elastic sealing part (64) between the inner walls of the third air outlet (621), so that the second stop protrusion (631) seals and covers the third air outlet (621); when the triggering device (7) pushes the second push rod (63) to the third open position, the seal of the second stop protrusion (631) and the second elastic sealing part (43) on the third air outlet (621) is released; the conveying pipe (8) includes a first channel (81) and a second channel (82), the second channel (82) The first channel (81) has an inlet (821) at one end and an outlet (822) at the other end. The inlet (821), the second channel (82), the outlet (822), the first channel (81), and the injection pipe (51) are connected in sequence. The fourth sealing valve (9) includes a third valve body (92), a third push rod (93), and a fourth elastic sealing part (94). The third valve body and the injection head (5) both have a second installation channel (921). The third push rod (93) can move to a fourth open position or a fourth closed position within the second installation channel (921). When the triggering device (7) moves to a non-triggering position... When the fourth elastic reset member (91) pushes the third push rod (93) to the fourth closed position, the third push rod (93) pushes the fourth elastic sealing part (94) to seal the outlet (822), so that the second channel (82) is not connected to the first channel (81) and the injection pipe (51); when the triggering device (7) moves to the triggering position, the triggering device (7) pulls the third push rod (93) to the fourth open position to release the seal of the fourth elastic sealing part (94) on the outlet (822), so that the second channel (82) is connected to the first channel (81) and the injection pipe (51);The fourth sealing valve (9) further includes a fifth elastic sealing portion (95), which is sleeved on the third push rod (93) and located between the third push rod (93) and the inner wall of the second mounting channel (921). The fifth elastic sealing portion (95) is used to seal the gap between the third push rod (93) and the inner wall of the second mounting channel (921). The end of the third push rod (93) has a first mounting groove (931). (94) is located in the first mounting groove (931); the triggering device (7) is a pressure rod, which includes a first operating part (72), a first pulling part (73), and a first pressing part (74). The first operating part (72), the first pulling part (73), and the first pressing part (74) are connected in sequence. The first pulling part (73) is connected to the third push rod (93); the pressure rod also has a rotating part (75), which is located between the first pressing part (74) and the first pulling part (73). The rotating part (75) is rotatably connected to the injection head (5) so that the pressure rod can rotate between the triggered position and the non-triggered position. When the first operating part (72) of the pressure rod rotates to the triggered position, the first pulling part (73) pulls the third pushing rod (93) to the fourth open position to release the seal of the fourth elastic sealing part (94) on the outlet (822) so that the second channel (82) is connected to the first channel (81) and the injection pipe (51). The first pressing part (74) pushes the second pushing rod (63) to the third open position to release the seal of the second stop protrusion (631) and the second elastic sealing part (43) on the third air outlet (621).