Connection valve and combustion appliance

Abstract

The application discloses a connecting valve and a combustion appliance. The connecting valve comprises a valve body, a gas output channel, a first input port, a second input port and a flow passage, the gas output channel and the flow passage are communicated through a communication port, a first communication structure, comprising a connecting assembly and a sealing assembly, the connecting assembly is arranged on the first input port of the valve body and is used for connecting a first gas cylinder, the sealing assembly is slidably arranged relative to the cavity wall of the flow passage and can be opened under the action of the gas pressure in the first gas cylinder to transport the first gas into the gas output channel, a second communication structure is installed on the second input port and is used for connecting a second gas cylinder and can be opened under the action of the gas pressure in the second gas cylinder to transport the second gas into the gas output channel. The connecting valve can connect different gas cylinders through the first communication structure and the second communication structure, and the practicability of the connecting valve is improved.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and more particularly to a connecting valve and a combustion appliance. Background Technology

[0002] Combustion appliances require valves to control the flow of gas during use. These valves are installed on the appliance itself. However, existing valves can only connect to one type of gas cylinder for gas supply, thus limiting the types of gas cylinders that can be used and making it inconvenient for the use of combustion appliances. Summary of the Invention

[0003] To address at least one problem existing in the prior art, according to one aspect of the present invention, a connecting valve is provided, comprising:

[0004] The valve body is provided with a gas output channel, a first input port, a second input port and a flow chamber. The gas output channel and the flow chamber are connected by a communication port. The first input port and the second input port are located at both ends of the flow chamber along the axial direction of the valve body.

[0005] The first connecting structure includes a connecting component and a sealing component. The connecting component is disposed at the first inlet of the valve body and is used to connect to the first gas cylinder. The sealing component is slidably disposed relative to the cavity wall of the flow chamber and the connecting component to seal the first inlet. It can also open the first inlet under the pressure of the gas in the first gas cylinder to deliver the first gas to the gas output channel.

[0006] The second connecting structure is installed at the second inlet for connecting to the second gas cylinder, and can open the second inlet under the pressure of the gas in the second gas cylinder to deliver the second gas into the gas output channel.

[0007] In some embodiments, the sealing assembly includes a slide rod and a first elastic member. The slide rod is slidably disposed relative to the cavity wall of the flow cavity and is used to abut against the connecting assembly to seal the first inlet. The first elastic member abuts between the slide rod and the cavity wall of the flow cavity or between the slide rod and the second connecting structure to apply a holding force to the slide rod.

[0008] In some embodiments, the flow cavity includes a first section, a second section, and a third section connected in sequence. The aperture of the second section is smaller than that of the first section and the third section, respectively. The first section is provided with the first input port, and the third section is provided with the second input port. The connecting port is located in the first section, the second section, or the third section.

[0009] The first elastic element abuts against the end of the first segment.

[0010] In some embodiments, the first segment includes a first part and a second part, the first part having the first input port, the diameter of the first part being larger than the diameter of the second part, and the communication port being located in the second part, the second segment, or the third segment;

[0011] The sealing assembly further includes a first sealing ring, which is sleeved on the slide rod and is used to abut against the end of the first part connected to the second part when the gas pressure in the first gas cylinder is greater than a preset value, so as to block the gas from flowing to the communication port.

[0012] In some embodiments, the slide bar includes a supporting head and a rod portion, the diameter of the supporting head facing the rod portion is larger than the diameter of the rod portion, the supporting head is slidably disposed within the first portion, the rod portion is slidably disposed within the first portion and the second portion, a limiting ring is provided on the rod portion, a first sealing ring is engaged between the supporting head and the limiting ring, and a first elastic member abuts between the limiting ring and the end of the second portion.

[0013] In some embodiments, the outer diameter of the end of the abutment head facing the connecting assembly gradually decreases toward the connecting assembly.

[0014] In some embodiments, the abutment head includes a constant diameter section and a variable diameter section, the constant diameter section being connected between the variable diameter section and the rod portion, the outer diameter of the variable diameter section gradually decreasing towards the connecting assembly, and the constant diameter section having an exhaust passage extending axially along the valve body.

[0015] In some embodiments, the exhaust passage is connected to the outer wall of the constant diameter section.

[0016] In some embodiments, the connecting assembly includes an external mounting member and a second sealing ring. The external mounting member is connected to the end of the valve body for connecting the first gas cylinder, and the second sealing ring abuts against the inner wall of the external mounting member and the first inlet for abutting against the sealing assembly.

[0017] In some embodiments, the first gas cylinder includes a first body and a first gas nozzle, the external mounting component has a through-hole, the first body is connected to the external mounting component, and the first gas nozzle passes through the through-hole;

[0018] The connecting assembly further includes an inner mounting component and a third sealing ring. The inner mounting component is disposed on the cavity wall of the through-hole and is used to fit over the port of the first gas cylinder. The third sealing ring and the second sealing ring are disposed on opposite sides of the inner mounting component, and the third sealing ring is used to fit over the first gas nozzle.

[0019] In some embodiments, the second communication structure includes a connector, a push rod, a second elastic element, and a fusible element. The connector is connected to the valve body and is used to connect to the second gas cylinder. The push rod is slidably disposed relative to the connector and the fusible element. The second elastic element abuts against the fusible element and the push rod and is used to apply an elastic force to the push rod. The fusible element is used to melt when the ambient temperature is higher than a preset temperature, so that the push rod can move towards the center of the valve body, thereby blocking the exhaust of the second gas cylinder.

[0020] In some embodiments, the fuse and the connector are threaded together.

[0021] In some embodiments, the connector includes a mounting section and a connecting section, the mounting section being connected to the valve body, the connecting section being used to connect to the second gas cylinder, and the diameter of the mounting section being larger than the diameter of the connecting section;

[0022] The second connecting structure also includes a fourth sealing ring, which is sleeved on the top rod and used to abut against the end of the mounting section facing the connecting section.

[0023] In another aspect, a combustion appliance is provided, comprising the connection valve described above.

[0024] In summary, the connection valve and combustion appliance provided by the present invention have the following technical effects:

[0025] By setting two connecting structures at both ends of the valve body: a first connecting structure and a second connecting structure, different gas cylinders can be connected through the first connecting structure and the second connecting structure respectively, and gas can be delivered to the combustion appliance through the gas output channel. Thus, by connecting different gas cylinders, the practicality of the connecting valve can be improved, and the use of multiple gas cylinders can be met. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the first gas cylinder according to an embodiment of the present invention;

[0027] Figure 2 for Figure 1 Reference diagram showing the usage status of the first gas cylinder in the system;

[0028] Figure 3 This is a reference diagram showing the usage state of the second gas cylinder according to an embodiment of the present invention;

[0029] Figure 4 for Figure 3 A cross-sectional schematic diagram of the second gas cylinder and the connecting valve;

[0030] Figure 5This is a schematic diagram of the connecting valve according to an embodiment of the present invention;

[0031] Figure 6 for Figure 5 Top view of the connecting valve in the middle;

[0032] Figure 7 for Figure 6 A cross-sectional view along the AA direction;

[0033] Figure 8 for Figure 6 A cross-sectional view along the BB direction;

[0034] Figure 9 for Figure 5 An exploded view of the connecting valve in the diagram;

[0035] Figure 10 for Figure 5 Top view of the valve body;

[0036] Figure 11 for Figure 10 A cross-sectional view along the CC direction;

[0037] Figure 12 for Figure 5 A schematic diagram of the first connected structure in the diagram;

[0038] Figure 13 for Figure 12 A cross-sectional schematic diagram of the first connected structure in the diagram;

[0039] Figure 14 for Figure 12 A schematic diagram of the sealing assembly in the diagram;

[0040] Figure 15 for Figure 5 A schematic diagram of the second connected structure in the diagram;

[0041] Figure 16 for Figure 15 A cross-sectional schematic diagram of the second connected structure in the diagram.

[0042] Attached Figure: 100-Connecting Valve, 10-Valve Body, 11-Gas Output Channel, 12-First Inlet Port, 13-Second Inlet Port, 14-Flow Chamber, 141-First Section, 1411-First Wall Surface, 1412-First Part, 1413-Second Part, 1414-Third Wall Surface, 142-Second Section, 143-Third Section, 1431-Second Wall Surface, 1432-First Internal Thread, 15-Connecting Port, 16-Mounting Notch, 20-First Connecting Structure, 21-Connecting Assembly, 211-External Mounting Part, 2111-Through Port, 212-Internal Mounting Part, 213-Second Sealing Ring, 214-Third Sealing Ring, 22-Sealing Assembly, 221-Slide Rod, 222-First 223-First sealing ring, 224-Support head, 2241-Exhaust channel, 2242-Constant diameter section, 2243-Variable diameter section, 225-Rod, 226-Limiting ring, 30-Second connecting structure, 31-Connector, 311-First external thread, 312-Second internal thread, 313-Mounting section, 314-Connecting section, 32-Push rod, 33-Second elastic element, 34-Fusible element, 341-Second external thread, 35-Fourth sealing ring, 40-Switch structure, 50-Connecting plug, 200-First gas cylinder, 210-First body, 220-First nozzle, 300-Second gas cylinder, 310-Second body, 320-Second nozzle, 330-Valve core. Detailed Implementation

[0043] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0044] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0046] The present invention will now be described in further detail with reference to the accompanying drawings.

[0047] Please see Figures 1 to 16The connecting valve 100 provided in this embodiment of the invention includes a valve body 10, a first connecting structure 20, and a second connecting structure 30.

[0048] Please refer to Figures 1 to 9 The valve body 10 is provided with a gas output channel 11, a first input port 12, a second input port 13, and a flow chamber 14. The gas output channel 11 and the flow chamber 14 are connected by a connecting port 15. The first input port 12 and the second input port 13 are located at both ends of the flow chamber 14 along the axial direction of the valve body 10. The first connecting structure 20 includes a connecting component 21 and a sealing component 22. The connecting component 21 is located at the first input port 12 of the valve body 10 and is used to connect the first gas cylinder 200. The sealing component 22 is slidably disposed relative to the cavity wall of the flow chamber 14 and the connecting component 21 to seal the first input port 12. It can also open the first input port 12 under the pressure of the gas in the first gas cylinder 200 to deliver the first gas to the gas output channel 11. The second connecting structure 30 is installed at the second input port 13 and is used to connect the second gas cylinder 300. It can also open the second input port 13 under the pressure of the gas in the second gas cylinder 300 to deliver the second gas to the gas output channel 11.

[0049] The aforementioned connecting valve 100 has two connecting structures at both ends of the valve body 10: a first connecting structure 20 and a second connecting structure 30. In this way, different gas cylinders can be connected through the first connecting structure 20 and the second connecting structure 30 respectively, and gas can be delivered to the combustion appliance through the gas output channel 11. By connecting different gas cylinders, the practicality of the connecting valve 100 can be improved, and the use of various gas cylinders can be met.

[0050] Please refer to Figure 7 , Figure 9 as well as Figures 12 to 14In this embodiment, the sealing assembly 22 includes a slide rod 221 and a first elastic member 222. The slide rod 221 is slidably disposed relative to the cavity wall of the flow cavity 14 and is used to abut against the connecting assembly 21 to seal the first inlet port 12. The first elastic member 222 abuts against the slide rod 221 and the cavity wall of the flow cavity 14 or between the second connecting structure 30, and is used to apply a holding force to the slide rod 221. Thus, when the second inlet port 13 is used, and when the first inlet port 12 is not used, under the elastic force of the first elastic member 222, one end of the slide rod 221... The gas is held against the connecting component 21, preventing gas from flowing into the first input port 12 through the second gas cylinder 300. When the first input port 1 is needed, this end of the second gas cylinder 300 is closed. Under the pressure of the gas in the first gas cylinder 200, the first elastic element 222 is compressed, and the slide rod 221 slides towards the second input port 13, disengaging from the connecting component 21. At this time, the gas flows in through the through hole of the connecting component 21, passes between the slide rod 221 and the cavity wall of the flow chamber 14, enters the connecting port 15, and finally flows out through the gas output channel 11.

[0051] Please refer to Figure 7 , Figure 10 and Figure 11 To facilitate the installation and use of the first elastic element 222, the flow cavity 14 includes a first segment 141, a second segment 142, and a third segment 143 connected in sequence. The aperture of the second segment 142 is smaller than the apertures of the first segment 141 and the third segment 143, respectively. The first segment 141 is provided with a first inlet 12, and the third segment 143 is provided with a second inlet 13. The first elastic element 222 abuts against the end of the first segment 141, thereby making the aperture of the second segment 142 smaller than the apertures of the first segment 141 and the third segment 143, so that the end of the first segment 141 facing the second segment 142 forms the first elastic element 222. One wall 1411, the third segment 143 has a second wall 1431 at one end facing the second segment 142. Thus, the first wall 1411 and the second wall 1431 can be used to abut against the sealing assembly 22 and the second connecting structure 30 respectively, so as to restrict the continued movement of the sealing assembly 22 and the first connecting structure 20. That is, the other end of the first elastic member 222 abuts against the first wall 1411 of the first segment 141, so that a shorter first elastic member 222 can be provided, so that the first elastic member 222 can be quickly compressed under the action of the gas pressure in the first gas cylinder 200.

[0052] The connecting port 15 can be located in the first segment 141, the second segment 142, or the third segment 143. Specifically, corresponding to the connecting valve 100 in this embodiment, the connecting port 15 is located in the first segment 141. Since the diameter of the first segment 141 is larger than the diameter of the second segment 142, it is convenient to open a gas output channel 11 with a smaller diameter, thereby realizing the connection between the gas output channel 11 and the first segment 141. In other embodiments, the connecting port 15 can be located in the second segment 142 or the third segment 143, which is not limited here.

[0053] When the connecting port 15 is provided on the first segment 141, the slide bar 221 slides towards the second segment 142, thereby opening the opening of the first gas cylinder 200. The gas in the first gas cylinder 200 can be input along the first input port 12 of the first segment 141 and flow into the gas output channel 11 through the connecting port 15 for output. When the second gas cylinder 300 needs to discharge gas, the slide bar 221 is in a sealed state for the first gas cylinder 200. The gas pressure in the second gas cylinder 300 opens the second connecting structure 30, and the second gas flows into the first segment 141 through the third segment 143 and the second segment 142 in sequence, thereby flowing into the gas output channel 11 through the connecting port 15 for output.

[0054] Furthermore, to ensure the normal use of the valve body 10, the first section 141 includes a first part 1412 and a second part 1413. The first part 1412 has a first inlet 12, and the diameter of the first part 1412 is larger than the diameter of the second part 1413. The connecting port 15 is located in the second part 1413, the second section 142, or the third section 143. The sealing assembly 22 also includes a first sealing ring 223, which is sleeved on the slide rod 221. When the gas pressure in the first gas cylinder 200 is greater than a preset value, the first sealing ring 223 abuts against the end of the first part 1412 connected to the second part 1413 to block the gas flow to the connecting port 15. Thus, when the gas output channel 11 is completely connected to the outside due to misoperation, the gas output channel 11 will be blocked from flowing to the connecting port 15. The gas in bottle 200 can flow out smoothly, increasing the outflow pressure. This pushes the slide rod 221 further within the flow cavity 14, causing it to slide towards the second connecting structure 30. This causes the first sealing ring 223 to slide against the end of the first part 1412 connected to the second part 1413, i.e., against the third wall surface 1414 of the first part 1412 facing the second part 1413. Since the connecting port 15 is not located on the first part 1412, the opening of the first part 1412 towards the second part 1413 is blocked by the first sealing ring 223 and the slide rod 221. At this time, the gas cannot continue to flow towards the second part 1413, thus preventing gas leakage.

[0055] Specifically, please refer to Figures 12 to 14In this embodiment, the slide bar 221 includes a supporting head 224 and a rod portion 225. The diameter of the supporting head 224 facing the rod portion 225 is larger than the diameter of the rod portion 225. The supporting head 224 is slidably disposed within the first portion 1412. A limiting ring 226 is provided on the rod portion 225. A first sealing ring 223 is engaged between the supporting head 224 and the limiting ring 226. A first elastic member 222 is engaged between the limiting ring 226 and the end of the second portion 1413. Thus, by engaging the first sealing ring 223 between the supporting head 224 and the limiting ring 226, the first sealing ring 223 is installed. By providing the limiting ring 226, the first elastic member 222 is installed.

[0056] The abutment head 224 is slidably disposed within the first part 1412, and the diameter of the rod part 225 is smaller than the inner diameter of the first part 1412 and the second part 1413. Understandably, when the abutment head 224 slides within the first part 1412, there is a gap between it and the cavity wall of the first part 1412. When the gas in the first gas cylinder 200 is discharged, it can flow through the gap between the abutment head 224 and the cavity wall of the first part 1412, thereby flowing into the communication port 15 located in the second part 1413.

[0057] Furthermore, since the abutment head 224 needs to abut against the connecting component 21 to achieve a seal on the first inlet 12, the outer diameter of the end of the abutment head 224 facing the connecting component 21 gradually decreases towards the connecting component 21. Thus, when the first gas cylinder 200 is not in use, under the elastic force of the first elastic member 222, the abutment head 224 is pushed into the connecting component 21 to abut against the inner wall of the connecting component 21, thereby achieving a seal. The abutment head 224, with its gradually decreasing outer diameter, also serves a guiding function. In other embodiments, the abutment head 224 with a constant outer diameter can also be provided, achieving a sealing effect when the abutment head 224 abuts against the connecting component 21.

[0058] Furthermore, since gas needs to flow between the support head 224 and the cavity wall of the first part 1412, in order to ensure smooth gas flow, the support head 224 is provided with an exhaust channel 2241 extending axially along the valve body 10. The support head 224 includes a constant diameter section 2242 and a variable diameter section 2243. The constant diameter section 2242 is connected between the variable diameter section 2243 and the rod 225. The outer diameter of the variable diameter section 2243 gradually decreases towards the connecting assembly 21. The constant diameter section 2242... An exhaust passage 2241 extending axially along the valve body 10 is provided, which is supported by the variable diameter section 2243 and the connecting assembly 21 to achieve a seal. The exhaust passage 2241 is provided by the constant diameter section 2242. Due to the provision of the exhaust passage 2241, the gas can not only flow between the support head 224 and the cavity wall of the first part 1412, but also flow through the exhaust passage 2241 to flow into the connecting port 15, ensuring the flow rate of the gas and thus ensuring the heat supply for gas combustion.

[0059] Please refer to Figure 14 To facilitate the design of the exhaust channel 2241, the exhaust channel 2241 is connected to the outer wall of the constant diameter section 2242. That is, only a notch needs to be made in the constant diameter section 2242 to form the exhaust channel 2241, thus facilitating its formation. In other embodiments, a through hole along the axial direction of the valve body 10 can also be made in the constant diameter section 2242, connecting to the outer wall of the variable diameter section 2243, thereby achieving gas flow.

[0060] Understandably, in order to ensure the flow of gas, multiple exhaust channels 2241 can be provided circumferentially on the support head 224, and each exhaust channel 2241 can be used for gas flow, thereby ensuring the effect of gas flow.

[0061] Please see Figure 7 , Figure 9 , Figure 12 and Figure 13 This is a schematic diagram of the connection component 21 according to an embodiment of the present invention. The connection component 21 includes an outer mounting part 211 and a second sealing ring 213. The outer mounting part 211 is connected to the end of the valve body 10 and is used to connect the first gas cylinder 200. The second sealing ring 213 abuts against the inner wall of the outer mounting part 211 and the first inlet 12, and is used to abut against the sealing component 22. That is, the second sealing ring 213 abuts against the abutting head 224 of the push rod 32, so as to seal the first inlet 12 when the first gas cylinder 200 is not needed. At the same time, the outer mounting part 211 is used to install the first gas cylinder 200. When the first gas cylinder 200 is inserted into the outer mounting part 211, the first gas nozzle 220 of the first gas cylinder 200 abuts against the second sealing ring 213. Figure 1As shown, the gas is discharged, driving the slide bar 221 to move, thereby discharging the gas from the first gas cylinder 200; at the same time, the second sealing ring 213 is provided, and since the second sealing ring 213 can deform to abut against the support head 224, it can achieve the effect of sealing the first inlet 12 when the gas in the first gas cylinder 200 is not needed.

[0062] The external mounting component 211 can be connected to the first gas cylinder 200 via a plug-in connection or a snap-fit ​​connection; neither is limited here. For details on installing the first gas cylinder 200, please refer to [link / reference needed]. Figure 1 and Figure 2 The first gas cylinder 200 includes a first body 210 and a first gas nozzle 220 disposed on the first body 210. The first body 210 is connected to an external mounting member 211. The external mounting member 211 is provided with a through-hole 2111. The first gas nozzle 220 of the first gas cylinder 200 passes through the through-hole 2111 and abuts against the second sealing ring 213.

[0063] Specifically, such as Figure 7 As shown, the inner diameter of the second sealing ring 213 is smaller than the diameter of the through-hole 2111, so that after the nozzle of the first gas cylinder 200 passes through the through-hole 2111, it can abut against the end face of the second sealing ring 213.

[0064] Among them, such as Figure 11 As shown, when installing the second sealing ring 213, the valve body 10 is provided with an installation notch 16, and the second sealing ring 213 is fitted into the installation notch 16.

[0065] Furthermore, to limit the installation of the first gas cylinder 200 on the valve body 10, the connecting assembly 21 also includes an inner mounting member 212 and a third sealing ring 214. The inner mounting member 212 is disposed on the cavity wall of the through-hole 2111 and is used to fit over the port of the first gas cylinder 200. The third sealing ring 214 and the second sealing ring 213 are disposed on opposite sides of the inner mounting member 212. The third sealing ring 214 is used to fit over the first gas nozzle 220 and limit the first gas nozzle 220. Thus, due to the second sealing ring 213 and The third sealing rings 214 are all made of flexible and elastic materials. Therefore, an inner mounting part 212 made of metal material needs to be set between them to support the second sealing ring 213 and the third sealing ring 214 when they are deformed. With the setting of the third sealing ring 214, when the gas from the first gas nozzle 220 is discharged, the gas may flow outward along the cavity wall between the first gas nozzle 220 and the through-hole 2111. The setting of the third sealing ring 214 achieves a sealing effect and prevents the gas from leaking out.

[0066] Please refer to Figure 3 and Figure 4In this embodiment, the second gas cylinder 300 includes a second body 310, a second air nozzle 320 disposed on the second body 310, and a valve core 330 slidably disposed within the second air nozzle 320. Please refer to... Figure 7 , Figure 9 , Figure 15 and Figure 16 This is a schematic diagram of the second connecting structure 30 in one embodiment of the present invention. The second connecting structure 30 includes a connector 31, a push rod 32, a second elastic member 33, and a fusible link 34. The connector 31 is connected to the valve body 10 and is used to connect to the second nozzle 320 of the second gas cylinder 300. The push rod 32 is slidably disposed relative to the connector 31 and the fusible link 34. The second elastic member 33 abuts against the fusible link 34 and the push rod 32 and is used to apply an elastic force to the push rod 32. The fusible link 34 is used to melt when the ambient temperature is higher than a preset temperature, so that the push rod 32 can move towards the center of the valve body 10, thereby blocking the exhaust of the second gas cylinder 300. However, due to the setting of the fuse 34, when the external temperature of the entire connecting valve 100 is too high, the temperature of the fuse 34 rises and exceeds the melting point of the fuse 34, causing the fuse 34 to melt. Due to the melting of the fuse 34, the push rod 32 can move towards the first connecting structure 20 under the action of the pushing force. The push rod 32 can no longer hold the valve core 330 in the second gas cylinder 300 under the action of the elastic force, and gradually separates from the valve core 330 in the second gas cylinder 300. Thus, the valve core 330 returns to its position, and the gas in the second gas cylinder 300 can no longer be discharged, that is, the exhaust of the second gas cylinder 300 is blocked, so as to achieve the effect of fuse protection.

[0067] Understandably, the fuse 34 in this embodiment is a plastic part, so that it can melt at high temperatures.

[0068] In this embodiment, the connector 31 is threadedly connected to the valve body 10 at the second inlet 13. The inner wall of the third section 143 of the flow cavity 14 has a first internal thread 1432, and the connector 31 has a first external thread 311. The first internal thread 1432 and the first external thread 311 are connected to achieve the installation of the connector 31. Furthermore, since the push rod 32 needs to be completely detached from the valve core 330 to block the exhaust from the second gas cylinder 300, to ensure the protective effect of the fusion, the length of the internal thread section is set to be greater than the length of the external thread section of the connector 31. Thus, the internal thread section has some remaining space facing the second section 142, so that after the fusion piece 34 melts, the second elastic member 33 and the push rod 32 can continue to move towards the second section 142, achieving complete detachment of the push rod 32 from the valve core 330 and ensuring the protective effect of the fusion.

[0069] Furthermore, during the installation of the fuse 34 and the connector 31, the fuse 34 and the connector 31 are threaded together. Specifically, the outer wall of the fuse 34 is provided with a second external thread 341, and the inner wall of the connector 31 is provided with a second internal thread 312. The second external thread 341 and the second internal thread 312 are connected to realize the installation of the fuse 34.

[0070] Please refer to Figure 15 and Figure 16 For the structural schematic diagram of the connector 31 in this embodiment, the connector 31 includes an installation section 313 and a connecting section 314. The installation section 313 is connected to the valve body 10, and the connecting section 314 is used to connect to the second gas cylinder 300. The diameter of the installation section 313 is larger than the diameter of the connecting section 314. Specifically, the connecting section 314 is used to connect to the second gas nozzle 320. The second connecting structure 30 also includes a fourth sealing ring 35. The fourth sealing ring 35 is sleeved on the top rod 32 and is used to abut against the end of the installation section 313 facing the connecting section 314. Thus, when the second inlet 13 is not in use, under the elastic force of the second elastic member 33, the fourth sealing ring 35 is held against the end face of the installation section 313 facing the connecting section 314, thereby achieving a sealing effect. When installing the fourth sealing ring 35, a groove can be provided on the top rod 32 to limit the installation of the fourth sealing ring 35.

[0071] Please refer to Figure 2 Only Figure 9 In order to realize the on / off of gas supply between the connecting valve 100 and the combustion appliance, the connecting valve 100 also includes a switch structure 40 and a connecting plug 50. The switch structure 40 is located at one end of the gas output channel 11 and is used to open or close the communication port 15 between the gas output channel 11 and the flow chamber 14. The connecting plug 50 is located at the other end of the gas output channel 11 and is used to connect to the combustion appliance. So when the connecting plug 50 is connected to the combustion appliance, when the switch structure 40 opens the communication port 15, the gas supplied from the first gas cylinder 200 or the gas supplied from the second gas cylinder 300 can be guided to the combustion appliance by the connecting plug 50.

[0072] The switch structure 40 can open or close the connection port 15 in the following ways: it can be a plug valve structure, that is, it can open and close by rotating the plug body around the center line; or it can be a ball valve structure, which can control the flow of gas by the movement of the ball. There is no limitation here.

[0073] The above-mentioned connecting valve 100 is used as follows: When gas is transported through the first gas cylinder 200, the push rod 32 in the second connecting structure 30 drives the fourth sealing ring 35 to abut against the end of the mounting section 313 under the elastic force of the second elastic member 33, thereby sealing the second inlet 13. The gas in the first gas cylinder 200 generates a thrust on the first elastic member 222 and the slide rod 221. The slide rod 221 moves towards the second inlet 13, compressing the first elastic member 222. At this time, the gas in the first gas cylinder 200 can pass through the abutment head 224 and the flow... Gas flows into the connecting port 15 between the walls of the cavity 14 and is then discharged by the connector 50 located in the gas output channel 11. When gas is supplied through the second gas cylinder 300, which is mounted on the valve body 10, the push rod 32 pushes open the valve core 330 under the elastic force of the second elastic member 33. Gas in the second gas cylinder 300 flows into the flow cavity 14 through the gap between the push rod 32 and the inner wall of the connector 31, and then flows through the second section 142 before flowing into the connecting port 15. Finally, it is discharged by the connector 50 located in the gas output channel 11. Therefore, the connecting valve 100 of this embodiment can be adapted to different gas cylinders, making it more practical.

[0074] In another embodiment of the present invention, a combustion appliance is also provided, including the aforementioned connecting valve 100. The combustion appliance can be a heating mechanism such as a gas stove.

[0075] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A connecting valve (100), characterized in that, include: A valve body (10) is provided with a gas output channel (11), a first input port (12), a second input port (13) and a flow chamber (14). The gas output channel (11) and the flow chamber (14) are connected by a communication port (15). The first input port (12) and the second input port (13) are located at both ends of the flow chamber (14) along the axial direction of the valve body (10). The first connecting structure (20) includes a connecting component (21) and a sealing component (22). The connecting component (21) is disposed at the first inlet (12) of the valve body (10) for connecting the first gas cylinder (200). The sealing component (22) is slidably disposed relative to the cavity wall of the flow chamber (14) and the connecting component (21) for sealing the first inlet (12) and can open the first inlet (12) under the action of the gas pressure in the first gas cylinder (200) to deliver the first gas to the gas output channel (11). The sealing assembly (22) includes a slide rod (221) and a first elastic member (222). The slide rod (221) is slidably disposed relative to the cavity wall of the flow cavity (14) and is used to abut against the connecting assembly (21) to seal the first inlet (12). The first elastic member (222) abuts against the slide rod (221) and the cavity wall of the flow cavity (14) or against the slide rod (221) and the second connecting structure (30) to apply a holding force to the slide rod (221). The flow cavity (14) includes a first section (141), a second section (142), and a third section (143) connected in sequence. The aperture of the second section (142) is smaller than that of the first section (141) and the third section (143). The first section (141) is provided with the first input port (12), and the third section (143) is provided with the second input port (13). The connecting port (15) is provided in the first section (141), the second section (142), or the third section (143). The first elastic element (222) abuts against the end of the first segment (141); The second connecting structure (30) is installed at the second inlet (13) for connecting the second gas cylinder (300) and can open the second inlet (13) under the action of the gas pressure in the second gas cylinder (300) to deliver the second gas to the gas output channel (11); The second connecting structure (30) includes a connector (31), a push rod (32), a second elastic element (33), and a fuse (34). The connector (31) is connected to the valve body (10) and is used to connect to the second gas cylinder (300). The push rod (32) is slidably disposed relative to the connector (31) and the fuse (34). The second elastic element (33) abuts against the fuse (34) and the push rod (32) and is used to apply an elastic force to the push rod (32). The fuse (34) is used to melt when the ambient temperature is higher than a preset temperature so that the push rod (32) can move towards the center of the valve body (10), thereby blocking the exhaust of the second gas cylinder (300).

2. The connecting valve (100) according to claim 1, characterized in that, The first segment (141) includes a first part (1412) and a second part (1413). The first part (1412) has the first input port (12). The diameter of the first part (1412) is larger than the diameter of the second part (1413). The communication port (15) is provided in the second part (1413), the second segment (142), or the third segment (143). The sealing assembly (22) further includes a first sealing ring (223), which is sleeved on the slide rod (221) and is used to abut against the end of the first part (1412) connected to the second part (1413) when the gas pressure in the first gas cylinder (200) is greater than a preset value, so as to block the gas from flowing to the communication port (15).

3. The connecting valve (100) according to claim 2, characterized in that, The slide bar (221) includes a supporting head (224) and a rod portion (225). The diameter of the supporting head (224) facing the rod portion (225) is larger than the diameter of the rod portion (225). The supporting head (224) is slidably disposed within the first portion (1412). The rod portion (225) is slidably disposed within the first portion (1412) and the second portion (1413). A limiting ring (226) is provided on the rod portion (225). The first sealing ring (223) is engaged between the supporting head (224) and the limiting ring (226). The first elastic member (222) abuts against the end of the limiting ring (226) and the second portion (1413).

4. The connecting valve (100) according to claim 3, characterized in that, The outer diameter of the abutment head (224) at one end toward the connecting component (21) gradually decreases toward the connecting component (21).

5. The connecting valve (100) according to claim 4, characterized in that, The abutment head (224) includes a constant diameter section (2242) and a variable diameter section (2243). The constant diameter section (2242) is connected between the variable diameter section (2243) and the rod (225). The outer diameter of the variable diameter section (2243) gradually decreases in the direction of the connecting assembly (21). The constant diameter section (2242) is provided with an exhaust channel (2241) extending axially along the valve body (10).

6. The connecting valve (100) according to claim 5, characterized in that, The exhaust passage (2241) is connected to the outer wall of the constant diameter section (2242).

7. The connecting valve (100) according to any one of claims 1-6, characterized in that, The connecting assembly (21) includes an external mounting part (211) and a second sealing ring (213). The external mounting part (211) is connected to the end of the valve body (10) for connecting the first gas cylinder (200). The second sealing ring (213) abuts against the inner wall of the external mounting part (211) and the first inlet (12) for abutting against the sealing assembly (22).

8. The connecting valve (100) according to claim 7, characterized in that, The first gas cylinder (200) includes a first body (210) and a first gas nozzle (220). The external mounting component (211) has a through-hole (2111). The first body (210) is connected to the external mounting component (211), and the first gas nozzle (220) passes through the through-hole (2111). The connecting assembly (21) further includes an inner mounting part (212) and a third sealing ring (214). The inner mounting part (212) is disposed on the cavity wall of the through-hole (2111) and is used to be fitted outside the port of the first gas cylinder (200). The third sealing ring (214) and the second sealing ring (213) are disposed on opposite sides of the inner mounting part (212). The third sealing ring (214) is used to be fitted outside the first gas nozzle (220).

9. The connecting valve (100) according to claim 1, characterized in that, The fuse (34) and the connector (31) are threaded together.

10. The connecting valve (100) according to claim 1, characterized in that, The connector (31) includes a mounting section (313) and a connecting section (314). The mounting section (313) is connected to the valve body (10), and the connecting section (314) is used to connect to the second gas cylinder (300). The diameter of the mounting section (313) is larger than the diameter of the connecting section (314). The second connecting structure (30) further includes a fourth sealing ring (35), which is sleeved on the top rod (32) and is used to abut against the end of the mounting section (313) facing the connecting section (314).

11. A combustion appliance, characterized in that, Includes the connecting valve (100) as described in any one of claims 1-10.

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