A dual combustion system for a hand-held torch and its combustion method

Abstract

The present invention discloses a dual combustion system for a handheld torch. The first combustion system uses a fuel storage tank to provide fuel, and the second combustion system uses an external gas source to provide fuel for the second burner through a gas-electric integrated plug-in device. Integrated ignition and flame detection are used to perform flame detection on the second burner, and an external ignition control system reignites the extinguished second burner according to the flame detection result; the first combustion system and the second combustion system can ignite each other; the present invention also discloses a combustion method for the above dual combustion system, and the transformation of the torch usage scenario can be completed by a simple plugging action. The present invention ensures the safety and convenience of the use of the combustion system, and meets the requirements of high integration, miniaturization and rapid gas-electric integration plug-in of the torch.

Description

Technical Field

[0001] The present invention relates to a dual combustion system for a hand-held torch and a combustion method thereof, belonging to the field of combustion and burners. Background Art

[0002] Torches and torch relay activities are highly anticipated elements in major sports games. A hand-held torch is generally a complete combustion system with its own fuel, having the function of turning on and off the torch gas, and can meet the combustion time required for the torch relay. The torches described in existing related patents can only be applied in the relay process and are limited by the internal fuel storage in terms of combustion duration. When there is a requirement for a hand-held torch that can not only perform relay but also be quickly fixed on a display stand for long-term combustion display, the above patents cannot meet the requirements. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned defects, and provide a dual combustion system for a hand-held torch and its usage method, which solves the problems in the prior art such as limited application scenarios of hand-held torches, low integration degree of torches, large size, inconvenient plugging, and poor safety. The hand-held torch using the dual combustion system of the present invention can not only be used for short-term relay transmission but also be plugged into a display stand for long-term combustion display.

[0004] To achieve the above-mentioned invention purpose, the present invention provides the following technical solutions:

[0005] A dual combustion system for a hand-held torch, comprising a first combustion system and a second combustion system located inside the torch housing;

[0006] The first combustion system includes a fuel storage tank, a first burner, and a valve provided between the fuel storage tank and the first burner. The fuel storage tank provides fuel for the first burner after the valve is opened;

[0007] The second combustion system includes a gas-electric integrated plugging device, an integrated ignition and flame detection, and a second burner; the gas-electric integrated plugging device includes a first plugging part and a second plugging part. The first plugging part is connected to an external gas source, and the second plugging part is connected to the second burner; when the first plugging part and the second plugging part are plugged together, the external gas source provides fuel for the second burner. The integrated ignition and flame detection is used to perform flame detection on the second burner and output the flame detection result to an external ignition control system. When the external ignition control system determines that the second burner has gone out according to the flame detection result, it controls the integrated ignition and flame detection to ignite the second burner;

[0008] The ignition method of the second burner is being ignited by an external fire source or being ignited by the first burner, and the ignition method of the first burner is being ignited by an external fire source or being ignited by the second burner.

[0009] Further, a lower gas pipeline and an upper gas pipeline are respectively provided in the first plug-in part and the second plug-in part, and the upper gas pipeline is connected to the second burner by a pipeline;

[0010] The pipeline includes a lower rigid pipe, an upper rigid pipe and a metal hose connected in sequence. Among them, the lower end of the lower rigid pipe is connected to the upper gas pipeline, and the upper end of the metal hose is connected to the second burner; the lower rigid pipe is arranged inside the torch shell, and the upper rigid pipe is independent of the torch shell; the torch shell with the lower rigid pipe arranged inside is formed by 3D printing;

[0011] The torch shell is formed by assembling an upper shell and a lower shell. The gas-electric integrated plug-in device is located inside the lower shell. After connecting the upper gas pipeline and the second burner with a pipeline, the upper shell and the lower shell are assembled, and the second burner is located inside the upper shell.

[0012] Further, the first plug-in part includes a base, a base core, a lower insulator, a lower gas pipeline, a first cable and a female electric contact for ignition;

[0013] The base core is fixedly installed on the base. A lower gas cavity and a lower circuit cavity are provided in the base core. The lower gas cavity is located at the center of the base core, and the lower circuit cavity is located outside the lower gas cavity;

[0014] The lower insulator is arranged outside the lower gas cavity. The female electric contact for ignition is assembled in the lower insulator. The first cable connected to the tail of the female electric contact for ignition passes through the lower circuit cavity and is connected to the integrated ignition and flame detection;

[0015] The lower gas pipeline is arranged in the lower gas cavity, and the lower gas pipeline is connected to an external gas source;

[0016] The second plug-in part includes an upper gas pipeline, a male electric contact for ignition, a second cable and an upper insulator;

[0017] The upper gas pipeline is fixed at the center of the torch shell, and the upper gas pipeline is connected to the second burner;

[0018] The upper insulator is arranged outside the upper gas pipeline. The male electric contact for ignition is assembled in the upper insulator. The second cable connected to the tail of the male electric contact for ignition is connected to the second burner;

[0019] When the first plug-in part and the second plug-in part are plugged in, the base locks the torch shell, the upper gas pipeline and the lower gas pipeline are communicated, and the male electric contact for ignition and the female electric contact for ignition are connected.

[0020] Further, the gas-electric integrated plug-in device further includes a plug-in place feedback mechanism;

[0021] The plug-in place feedback mechanism includes 2 female electric contacts for feedback, 2 male electric contacts for feedback and an energization induction circuit;

[0022] The female electrical contact for feedback is assembled in the lower insulator, and the first cable connected to the tail of the female electrical contact for feedback passes through the lower circuit cavity and then is connected to the energization induction circuit;

[0023] The male electrical contact for feedback is assembled in the upper insulator, and the two second cables connected to the tails of the two male electrical contacts for feedback are short-circuited;

[0024] When the first plugging part and the second plugging part are plugged, the female electrical contact for feedback and the male electrical contact for feedback are connected, and the energization induction circuit judges whether the first plugging part and the second plugging part are plugged in place. When plugged in place, it sends a plug-in place signal to the external ignition control system. After receiving the plug-in place signal, the external ignition control system controls the integrated ignition and flame detection to ignite the second burner when it judges that the second burner has gone out according to the flame detection result;

[0025] The number of lower circuit cavities is equal to the total number of the female electrical contacts for feedback and the female electrical contacts for ignition, and each lower circuit cavity is independent of each other.

[0026] Further, the base includes a first seat body, a second seat body provided on the first seat body, and a locking device;

[0027] The torch housing is provided with a locking hole;

[0028] The second seat body is of a cylindrical structure, the base core is located in the second seat body and is fixedly connected to the first seat body; there is a gap for accommodating the torch housing between the inner wall of the second seat body and the outer wall of the base core;

[0029] The side wall of the second seat body is provided with an outward protrusion, and a pin hole penetrating the side wall is provided in the protrusion; the direction of the pin hole is perpendicular to the axis of the second seat body;

[0030] The locking device includes an external nut, a spring and a pin shaft; the spring is sleeved outside the pin shaft, the first end of the pin shaft is inserted into the pin hole, the second end is fixedly connected to the external nut, and the external nut is screwed to the outer surface of the protrusion;

[0031] The end face of the first end of the pin shaft is an inclined surface. When the first plugging part and the second plugging part are plugged, the torch housing enters downward into the gap between the inner wall of the second seat body and the outer wall of the base core and contacts the inclined surface, pushing the pin shaft outward and compressing the spring until the locking hole provided on the torch housing is aligned with the pin shaft, and the pin shaft enters the positioning hole under the action of the spring to realize the locking of the base to the torch housing.

[0032] Further, the lower end of the lower gas pipeline is screwed to the inner wall of the lower gas cavity, the upper end of the upper gas pipeline is screwed to the torch housing. When the first plugging part and the second plugging part are plugged, the upper end of the lower gas pipeline and the lower end of the upper gas pipeline are plugged, and the outer wall of the upper end of the lower gas pipeline is matched with the inner wall of the lower end of the upper gas pipeline. The matching position is sealed with ≥3 O-rings;

[0033] The surface of the O-ring and the inner wall of the upper gas pipeline are coated with grease, and the apparent viscosity of the grease at the service temperature is ≤ 700 Pa·s;

[0034] The upper end of the lower gas chamber is a flared opening with a larger upper part and a smaller lower part.

[0035] Furthermore, the lower insulator is a cylindrical structure arranged outside the lower gas chamber, and the inner wall of the lower insulator contacts the outer wall of the lower gas chamber; the male electrical contacts for ignition and the male electrical contacts for feedback are collectively referred to as male electrical contacts, and the female electrical contacts for ignition and the female electrical contacts for feedback are collectively referred to as female electrical contacts;

[0036] The female electrical contacts are assembled between the inner wall and the outer wall of the lower insulator;

[0037] The upper insulator is a cylindrical structure arranged outside the upper gas pipeline, and the male electrical contacts are assembled between the inner wall and the outer wall of the upper insulator;

[0038] Each of the lower circuit chambers is evenly distributed circumferentially outside the lower gas chamber, and the female electrical contacts are evenly distributed outside the lower gas chamber.

[0039] Furthermore, the female electrical contacts and the male electrical contacts are respectively fixed in the lower insulator and the upper insulator by a press-fit method;

[0040] The head position of the female electrical contact is lower than the upper end of the lower insulator; the head of the male electrical contact extends out of the upper insulator;

[0041] When the first insertion part and the second insertion part are inserted, the upper end of the lower insulator and the lower end of the upper insulator are matched, and the head of the female electrical contact and the head of the male electrical contact are connected; a chamfer is provided at the upper end of the outer wall of the lower insulator, and a boss matching the chamfer is left at the lower end of the outer wall of the upper insulator;

[0042] The upper end of the inner wall of the lower insulator is higher than the upper end of the lower gas chamber, and the upper end of the lower gas pipeline is lower than the upper end of the lower gas chamber;

[0043] A circumferential boss is provided at the upper end of the inner wall of the lower insulator, and a circumferential groove matching the circumferential boss is provided at the lower end of the inner wall of the upper insulator;

[0044] A lower insulator groove and an upper insulator groove are respectively provided in the lower insulator and the upper insulator;

[0045] The connection part of the female electrical contact and the first cable is located in the lower insulator groove, the connection part of the male electrical contact and the second cable is located in the upper insulator groove, and the lower insulator groove and the upper insulator groove are filled with insulating glue.

[0046] Furthermore, the outer diameter of the lower insulator is equal to the maximum outer diameter of the base core; the outer wall surface of the lower insulator and the outer wall surface of the base core form a continuous cylindrical wall surface;

[0047] The cylindrical wall surface is provided with an axial limiting groove, and the inner wall of the torch shell is provided with an axial limiting protrusion. When the first insertion part and the second insertion part are inserted, the limiting groove and the limiting protrusion cooperate for circumferential limitation.

[0048] A combustion method for a dual combustion system of a hand-held torch, comprising:

[0049] Before the first insertion part and the second insertion part in the second combustion system are inserted, the fuel storage tank in the first combustion system provides fuel for the first burner, and the first burner is ignited by an external fire source;

[0050] After the first insertion part and the second insertion part in the second combustion system are inserted, an external gas source provides fuel for the second burner, the first burner ignites the second burner, and the first burner and the second burner burn simultaneously;

[0051] After the gas in the fuel storage tank is exhausted, the first burner goes out, and the second burner continues to burn; the integrated ignition and flame detection is used to perform flame detection on the second burner and output the flame detection result to an external ignition control system. The external ignition control system controls the integrated ignition and flame detection to ignite the second burner when it judges that the second burner has gone out according to the flame detection result;

[0052] Or it includes:

[0053] The first insertion part and the second insertion part in the second combustion system are inserted, an external gas source provides fuel for the second burner, and the second burner is ignited by an external fire source; the integrated ignition and flame detection is used to perform flame detection on the second burner and output the flame detection result to an external ignition control system. The external ignition control system controls the integrated ignition and flame detection to ignite the second burner when it judges that the second burner has gone out according to the flame detection result;

[0054] The valve in the first combustion system is opened, the second burner ignites the first burner, and the first burner and the second burner burn simultaneously;

[0055] The first insertion part and the second insertion part in the second combustion system are separated, the second burner goes out, and the first burner continues to burn until the gas in the fuel storage tank is exhausted or the valve is closed.

[0056] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0057] (1) The dual combustion system of the present invention creatively provides a perfect solution to the problem that the hand-held torch has both a relay function and a fixed long-period display function. Without changing the original appearance of the hand-held torch, this solution can be used as a hand-held torch for relay or as a torch stand for fixed display, and the transformation of the torch usage scenario can be completed by a simple plugging action;

[0058] (2) In the dual combustion system of the present invention, the flames ignite each other internally, and what is shown externally is the same flame. The dual combustion systems are independent of each other. The first and second combustion systems can operate independently of each other without mutual influence, ensuring the safety and convenience of the use of the combustion system;

[0059] (3) An integrated gas-electric plug-in device for a torch according to the present invention can meet the requirements of high integration, miniaturization, and rapid gas-electric integration plug-in when the plug-in device is placed at the bottom of the torch;

[0060] (4) A locking device is designed for the plug-in device of the present invention, ensuring rapid plug-in and reliable locking;

[0061] (5) A plug-in feedback mechanism is designed in the plug-in device of the present invention, which realizes direct feedback of the plug-in in place in a simple manner, reduces the judgment link, and reduces the probability of failures in the implementation process, featuring simplicity, high efficiency, and high reliability;

[0062] (6) The plug-in device of the present invention has a good guiding effect. The formed plug-in device enables athletes to complete smooth plug-in through simple steps without relying on vision;

[0063] (7) The plug-in device of the present invention has good sealing performance and smooth plug-in performance. Through the overall structure design and the use of insulating glue, it can not only seal the gas safely and reliably but also complete the plug-in smoothly.

[0064] (8) The plug-in device of the present invention has a reliable dielectric effect. No creepage occurs between the circuits in the plug-in device and between the circuits and the metal, having good safety performance. Description of the Drawings

[0065] Figure 1 is a schematic diagram of the dual combustion system for a hand-held torch in a preferred embodiment of the present invention;

[0066] Figure 2 is a schematic diagram of the fusion section of the pipeline and the torch housing in a preferred embodiment of the present invention;

[0067] Figure 3 is a schematic diagram of the separation section of the pipeline and the torch housing in a preferred embodiment of the present invention;

[0068] Figure 4 is a schematic diagram of the connection between the rigid pipe and the metal hose in the pipeline in a preferred embodiment of the present invention;

[0069] Figure 5 is an overall sectional view of the plug-in device in a preferred embodiment of the present invention;

[0070] Figure 6External view of the lower part of the plugging device in a preferred embodiment of the present invention;

[0071] Figure 7 Cross-sectional view of the lower part of the plugging device in a preferred embodiment of the present invention;

[0072] Figure 8 Cross-sectional view of the gas path of the plugging device in a preferred embodiment of the present invention;

[0073] Figure 9 Cross-sectional view of the circuit of the plugging device in a preferred embodiment of the present invention;

[0074] Figure 10 Cross-sectional view of the upper part of the plugging device in a preferred embodiment of the present invention;

[0075] Figure 11 Stereogram of the upper part of the plugging device in a preferred embodiment of the present invention;

[0076] Figure 12 Schematic diagram of the locking device of the plugging device in a preferred embodiment of the present invention;

[0077] Figure 13 Schematic diagram of the plug-in place feedback mechanism of the plugging device in a preferred embodiment of the present invention;

[0078] In the figure, 1 - First combustion system, 2 - Second combustion system, 11 - Fuel storage tank, 12 - Valve, 13 - First burner, 21 - Gas-electric integrated plugging device, 22 - Pipeline, 23 - Cable, 24 - Second burner, 25 - Integrated ignition and flame detection, 222 - Metal hose;

[0079] 101 - Torch housing, 102 - Cable trough, 103 - Limiting protrusion, 104 - Locking hole, 111 - Upper insulator, 112 - Male electrical contact, 113 - Second cable, 114 - Upper insulator groove, 121 - Upper gas pipeline, 1111 - Boss, 1112 - Circumferential groove, 1211 - Lower part of the upper gas pipeline;

[0080] 201 - Base, 202 - Base core, 203 - Screw, 211 - Lower insulator, 212 - Female electrical contact, 213 - First cable, 214 - Lower insulator groove, 221 - Lower gas pipeline, 122, 222 - O-ring, 230 - Locking device, 231 - Outer nut, 232 - Spring, 233 - Pin shaft, 240 - Limiting groove, 2021 - Upper opening of the base core, 2111 - Shrinkage groove, 2112 - Circumferential boss, 2211 - Upper part of the lower gas pipeline, 2331 - Inclined plane. Detailed implementation method

[0081] The present invention will be described in detail below, and its features and advantages will become clearer and more definite with these descriptions.

[0082] The specific term "exemplary" here means "serving as an example, embodiment, or illustration". Any embodiment described as "exemplary" here does not have to be construed as superior to or better than other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings do not have to be drawn to scale unless otherwise specified.

[0083] The following will be combined with Figures 1 to 13 to describe the technical solution of the present invention in detail.

[0084] The dual combustion system of the present invention for a hand-held torch includes two independent combustion systems arranged inside the torch housing. Its first combustion system is the complete and original combustion system of the hand-held torch, and the second combustion system is a combustion system including an integrated gas-electricity plug-in device, a second burner, integrated ignition and flame detection. After the gas-electric integrated plug-in device of the second combustion system is plugged in place, an external gas source is introduced and ignited by the flame of the first combustion system ignited in the relay stage, and the rapid switching of the flame can be realized during the combustion process. The setting of the second combustion system is related to the first combustion system in terms of structure: the gas-electric integrated plug-in device is placed at the lower part of the torch housing to facilitate the plugging action, and the burner of the second combustion system needs to be placed above the torch housing and can be ignited by the first combustion system. Neither of the built-in dual combustion systems involves any changes to the appearance of the torch housing, and the appearance of the torch housing is the same as that of the original hand-held torch without the second combustion system.

[0085] Furthermore, the first combustion system and the second combustion system can burn simultaneously until the fuel in the fuel tank built into the first combustion system is exhausted.

[0086] Furthermore, the combustible time of the second combustion system depends on the fuel supply of the external gas supply device.

[0087] Furthermore, due to the compact internal space of the hand-held torch housing, the position of the original first combustion system needs to be adjusted. The second combustion system is structurally attached to the first combustion system, and transition connectors such as quick-connect pipe fittings, hoses, and quick cable plugs are required to meet the assembly requirements.

[0088] Furthermore, the integrated ignition and flame detection components maintain the long-term combustion of the flame. If the flame goes out, it can be quickly judged and the flame can be ignited.

[0089] Furthermore, the first combustion system generally includes basic components such as a fuel tank, a valve, and a burner, and its specific content is subject to the original combustion system of the hand-held torch.

[0090] When the torch with this dual combustion system is put into use, the torchbearer holds the torch, opens the valve of the first combustion system, and the fuel contained in the fuel storage tank of the first combustion system is released. The first combustion system of this torch is ignited by the torch held by the previous torchbearer. After the torchbearer performs the specified transfer actions with this torch, the torch is plugged into the display stand, and the external gas supply, power supply, and signal systems are connected by the gas-electric integrated plug-in device. The gas supplied by the external gas supply device enters the second combustion system and is ignited by the flame of the first combustion system. At this time, the flames of the dual combustion systems coexist until the fuel in the fuel storage tank of the first combustion system is exhausted, and only the second combustion system remains in the combustion state.

[0091] When the torch with this dual combustion system is put into use, the torch can also be first plugged into the display stand to ignite the second combustion system first. At the end stage of the display, the torchbearer opens the valve of the first combustion system to release the fuel, and the first combustion system is ignited by the second combustion system. At this time, the flames coexist. The torchbearer pulls out this torch from the display stand and enters the transfer and display state. At this time, only the first combustion system is in the combustion state until the internal fuel is exhausted or the valve is actively closed.

[0092] When the second combustion system is burning, the integrated ignition and flame detection detect the flame state, and perform secondary ignition when a flameout condition occurs or ignite at any time as needed.

[0093] In a preferred embodiment, a dual combustion system for a handheld torch according to the present invention, as Figure 1 shown, the inside of the torch housing 101 contains two independent combustion systems. Its first combustion system 1 is a complete and original handheld torch combustion system, and the second combustion system 2 is a combustion system including a gas-electric integrated plug-in device 21, a pipeline 22, a second burner 24, an integrated ignition and flame detection 25, a cable 23 and accessories. The built-in dual combustion system does not involve any changes to the appearance of the torch housing 101, and the appearance of the torch housing is the same as that of the original handheld torch without the second combustion system. The torch with the built-in dual combustion system can be used as a handheld torch for torch relay, or can be fixed on the ceremony platform through the plug-in device for long-term combustion display, and the two working states can be switched under the combustion state.

[0094] The first combustion system 1 and the second combustion system 2 can burn simultaneously until the fuel in the built-in fuel storage tank 11 of the first combustion system is exhausted.

[0095] The combustible time of the second combustion system 2 depends on the fuel supply of the external gas supply device.

[0096] The gas-electric integrated plugging device 21 included in the second combustion system 2 is located below the hand-held torch. After the hand-held torch and the display stand complete the plugging action, the second combustion system can be supplied with gas and power by an external gas supply device and an ignition control system through the gas-electric integrated plugging device 21, and signals can be transmitted to the external ignition control system.

[0097] The burner 24 included in the second combustion system can be ignited by the first combustion system. The integrated ignition and flame detection 25 can be used to maintain the long-term combustion of the flame. If the flame goes out, it can be quickly judged and the flame can be lit. The pipeline 22 connects the gas-electric integrated plugging device 21 and the second burner 24, and supplies gas from the external gas source and the gas-electric integrated plugging device 21 to the second burner 24 in sequence. The cable 23 connects the gas-electric integrated plugging device 21 and the integrated ignition and flame detection 25, and is used to transmit the flame detection signal and the ignition current between the two.

[0098] Such as Figure 2 、 Figure 3 And Figure 4 For, the pipeline 22 of the second combustion system 2 is attached to the torch shell 101 in a way of first combining and then separating. The pipeline 22 develops upward as the internal pipeline of the torch shell 101 from the gas-electric integrated plugging device 21, and then separates into an independent pipeline and is connected to the metal hose 222. The upper end of the metal hose 222 is connected to the second burner 24. This design is considered in view of the requirement of miniaturization. The first combustion system has fully utilized the internal space of the hand-held torch. Without changing the shape of the hand-held torch, it is preferably to combine the torch shell and the pipeline. The torch shell with the pipeline inside is formed by 3D printing.

[0099] The metal hose 222 has good flexibility and reliable sealing for repeated bending. Before the upper and lower parts of the torch shell 101 are closed, the flexibility of the hose can be used to complete the assembly of the inlet joint of the second burner 24, and then the torch shell 101 is closed to complete the assembly of the whole torch. If the metal hose 222 is not used, it will cause the second burner 24 to be unable to be adjusted relative to the torch shell 101 after the torch shell 101 is closed, and the assembly relationship cannot be satisfied.

[0100] The first combustion system 1 generally includes a fuel storage tank 11, a valve 12 and a first burner 13, and its specific content is subject to the original combustion system of the hand-held torch.

[0101] The gas-electric integrated plugging device 21 includes a first plugging part and a second plugging part. The first plugging part is the lower part of the plugging device, and the second plugging part is the upper part of the plugging device. Among them, the upper part of the plugging device, as a part of the torch, is combined with the torch shell 101. After the upper part of the plugging device and the lower part of the plugging device are plugged, the torch is ignited.

[0102] In a preferred embodiment, such asFigure 5 , both the upper part and the lower part of the plugging device each contain an integrally integrated gas path such as Figure 8 and an electric circuit such as Figure 9 . The gas is a single channel, located in the center of the device, for the circulation of gas. The external gas is successively input into the second burner through the base core 202, the lower gas pipeline 221 and the upper gas pipeline 121. The plugging positions of the lower gas pipeline 221 and the upper gas pipeline 121 are sealed with three O-rings 222. The electric circuit is a multi-channel, located around the gas channel, for the transmission of electrical signals such as an external ignition control system, such as a high-voltage circuit or a plug-in place feedback signal. It mainly consists of a base core 202, a lower insulator 211, a female electric contact 212, a first cable 213, a second cable 113, an upper insulator 111, and a male electric contact 112. Among them, the female electric contact 212 includes two types: a female electric contact for ignition and a female electric contact for feedback. The male electric contact 112 includes a male electric contact for ignition and a male electric contact for feedback. The difference between the two types of female electric contacts and between the two types of male electric contacts is only that the devices connected by the cables are different. The female electric contact for ignition is connected to the integrated ignition and flame detection 25, the female electric contact for feedback is connected to the energized induction circuit, the male electric contact for ignition is connected to the second burner 24, and the male electric contact for feedback is short-circuited.

[0103] The male electric contact 112 and the female electric contact 212 are respectively assembled into the holes of the upper insulator 111 and the lower insulator 211 by a pressure assembly method. The tails of the electric contacts are connected to the cables. The connection ports of the tails of the contacts and the cables are respectively located in the upper insulator groove 114 and the lower insulator groove 214, and the grooves are filled with insulating glue.

[0104] In order to prevent the phenomenon of high-voltage electric creepage between the electric contacts, the end of the female electric contact 212 is retracted into the lower insulator 211 to form a shrinkage groove 2111. The shrinkage groove 2111 starts from the end of the female electric contact and extends to the upper end of the lower insulator 211. The outer wall of the notch of the shrinkage groove 2111 is chamfered. At the connection of the upper insulator 111 and the male electric contact 112 corresponding to it, a boss 1111 is provided. The lower end of the boss 1111 is in a shape complementary to the chamfer of the outer wall of the shrinkage groove 2111. When not plugged in, the shrinkage groove 2111 can effectively extend the creepage distance between the female electric contacts 212 and prevent the creepage phenomenon. After the plugging is completed, the boss 1111 cooperates with the chamfer of the outer wall of the shrinkage groove 2111 of the lower insulator. The mating surface is an inclined surface, which can cut off the creepage path between the male electric contacts 112.

[0105] To prevent the creepage phenomenon between the plugging position of the electrical contact and the gas pipeline, a circumferential boss 2112 is provided on the lower insulator 211, a circumferential groove 1112 is provided on the upper insulator, and the base core 202 and the lower gas pipeline 221 are both shrunk inside the lower insulator 211. When not plugged, the circumferential boss 2112 and the settings of the base core 202 and the lower gas pipeline 221 shrunk inside the insulator effectively extend the creepage distance and prevent the occurrence of creepage phenomenon. After plugging, the mating surface of the circumferential boss 2112 and the circumferential groove 1112 can effectively cut off the creepage path.

[0106] To ensure the accuracy of the plugging orientation, the lower part 1211 of the upper gas pipeline, the upper part 2211 of the lower gas pipeline, and the trumpet-shaped upper outlet of the base core 202 together form an axial guiding groove to form axial guidance. The inner wall surface of the torch housing 101 is provided with an axial limiting projection 103, and the limiting projection 103 and the limiting groove 240 on the lower part of the plugging device together form circumferential positioning. Axial positioning and circumferential positioning support the accuracy of the plugging device orientation.

[0107] To ensure the smoothness of plugging, lubricating grease is applied to the surface of the O-ring 222 and the inner surface of the upper gas pipeline 121. If the plugging device is used at low temperature, low-temperature lubricating grease corresponding to the temperature should be applied, and the apparent viscosity of the lubricating grease at the operating temperature should be ≤ 700 Pa·s.

[0108] Such as Figure 6 and Figure 7 , the lower part of the plugging device includes a base 201, a base core 202, a lower gas pipeline 221, a lower insulator 211, a female electrical contact 212, and a first cable 213. Among them, the base core 202 is installed at the center of the base 201, limited by a boss, and locked by a screw 203. The lower gas pipeline 221 is threadedly connected to the base core 202. The base 201 includes a locking device 230, such as Figure 12 , the locking device 230 includes an outer nut 231, a spring 232, and a pin 233. When plugging, the torch housing 101 moves downward and contacts the inclined surface 2331 at one end of the pin 233, causing the pin 233 to move outward and compress the spring 232 at the same time. After plugging in place, the pin 233 will be inserted into the locking hole 104 on the torch housing 101 under the push of the spring 232 to form a one-way lock on the torch. The angle θ between the inclined surface 2331 of the pin and the vertical direction is reasonably set so that the weight of the torch acting on the inclined surface 2331 ≥ the thrust of the spring 232, and the plugging can be completed by using the weight of the torch itself. The purpose of this design is to reduce the resistance of the torch bearer's plugging action and make the plugging action easy to complete.

[0109] Such as Figure 10 and Figure 11, in the upper part of the plug-in device, the upper gas pipeline 121 is connected to the torch housing 101 by threads, and at the same time, the upper insulator 111 is pressed by the upper gas pipeline 121 and the torch housing 101.

[0110] In the present invention, a plug-in place feedback mechanism is composed of two female electrical contacts 212, two male electrical contacts 112 and an energized induction circuit. As Figure 13 shown, the above two female electrical contacts 212 and two male electrical contacts 112 are respectively named the female electrical contact for feedback and the male electrical contact for feedback; in the plug-in place feedback mechanism, the two male electrical contacts for feedback are connected in series by short-circuiting with a cable. The working method of this plug-in place feedback mechanism is as follows: the energized induction circuit is respectively connected to the two female electrical contacts for feedback. When the upper part and the lower part of the plug-in device complete the plug-in action, the series-connected male electrical contacts for feedback can form a closed circuit, and the energized induction circuit determines the completion of the plug-in action and sends a plug-in place signal to the external ignition control system to complete the feedback of the plug-in place. After the plug-in is completed, the external ignition control system controls the integrated ignition and flame detection to send a high-voltage electrical signal to the electrical contact. This plug-in place feedback mechanism does not use sensors and does not adopt a large number of components, and realizes the direct feedback of the plug-in place in the simplest and most ingenious way, reducing the judgment link and the probability of failure in the implementation process, and has the characteristics of simplicity, high efficiency and high reliability.

[0111] A cable through-hole is provided on the torch housing 101. One end of the second cable 113 is connected to the tail of the male electrical contact 112, and the other end passes through the cable through-hole and is connected or short-circuited to the second burner. A cable groove 102 is provided above the cable through-hole. The cable through-hole and the cable groove 102 of the torch housing 101 are filled with insulating glue, which can prevent rainwater from entering the plug-in device through the torch, and at the same time can prevent the gas with the sealing failure of the plug-in device from entering the torch cavity through the cable groove 102. The insulator is made of a high-strength lightweight insulating plastic material that can be finely processed.

[0112] Except for the lower insulator 211 and the upper insulator 111, all other components of the present invention are made of metal materials.

[0113] The plug-in device of the present invention has a high degree of integration and solves the contradiction between the complex gas and electrical plug-in functional structure and the limited space (the outer shape is smaller than the hand-held size). The plug-in device is placed inside the bottom of the torch, and the internal space is narrow. At the same time, the gas and electrical integrated plug-in device bears multiple functions, and this contradiction can only be solved through high integration. The present invention combines the gas path and the circuit with the shape of the torch, and integrates the structure by using the gas path in the center and the multi-path circuits evenly distributed circumferentially. At the same time, the structures of the circuit and the gas path are used in combination with each other to form a highly integrated, miniaturized and multi-functional plug-in device.

[0114] The present invention solves the contradiction between non-visible plugging and reliable docking. According to the functional requirements of the device, this plugging device needs to meet the blind plugging requirements of the torchbearer, that is, to complete the plugging without the torchbearer using vision at all. The present invention adopts a circumferential positioning and axial guiding structure to provide a perfect blind plugging solution: after the torchbearer completes the plugging through the plugging device, only a simple rotation is required to find the circumferential positioning groove (i.e., the limiting groove 240), and then pressing down can complete the reliable docking under the guidance of the axial guiding device (i.e., the lower part 1211 of the upper gas pipeline, the upper part 2211 of the lower gas pipeline, and the upper outlet 2021 of the horn-shaped base core).

[0115] The present invention solves the contradiction between smooth plugging and reliable sealing. The sealing of gas is different from that of liquid media. Gas media may have varying degrees of slight leakage during the sealing process. In the semi-closed space of the plugging device, the accumulation of slight leakage may cause the gas concentration in the plugging device to reach the lower explosion limit. At this time, any slight discharge of the circuit may cause deflagration in the plugging device. Especially when the medium to be sealed is hydrogen, which is extremely easy to leak, the requirement for sealing reliability is raised to the highest level. The present invention adopts a method of axial sealing with three O-rings, which can reduce the hydrogen leakage to less than 1 ppm. However, multiple seals result in a decrease in the smoothness of plugging. The present invention adopts an axial guiding method to evenly compress the circumferential O-rings during plugging, and uses grease to effectively reduce the friction force between the compression surface of the O-ring and the metal surface, greatly improving the smoothness of plugging. If the plugging device is used at a low temperature, the O-rings stiffened by the low temperature will greatly hinder the smoothness of plugging. Therefore, O-ring materials with good elastic deformation at low temperatures should be used. At the same time, the increase in the viscosity of the grease at low temperatures will also lead to difficult plugging. Grease with a lower kinematic viscosity at low temperatures should be used.

[0116] The present invention solves the contradiction between miniaturization and high-voltage creepage distance. In the plugging device circuit of the present invention, high-voltage electricity above 5000 kV is mainly used. The creepage phenomenon of the high-voltage circuit to the ground is extremely serious. Especially when used in a humid environment, the air dielectric capacity decreases, thereby lengthening the dielectric distance. The creepage phenomenon mainly concentrates on the ends of the male and female electrical contacts, cable connection points, etc. The cable connection point is a static structure. The connection point is indented into the insulation by using holes and grooves, and the holes and grooves are filled with insulating glue for encapsulation. The creepage phenomenon at the ends of the male and female electrical contacts cannot be encapsulated with insulating glue, and only the dielectric distance can be lengthened by the structure or the creepage path can be cut off. The creepage at the ends of the male and female electrical contacts is divided into three creepage modes: creepage between electrical contacts, creepage of the electrical contact to the metal of the gas path, and creepage of the electrical contact to the torch shell. The specific solution is to retract the plugging points of the male and female electrical contacts into the holes and grooves, and at the same time set the cooperation between the holes and grooves and the end face to cut off the creepage path. The cooperation of convex and concave surfaces is set on both the inner ring and the outer ring of the insulator to effectively extend the dielectric distance. The contradiction between miniaturization and high-voltage creepage distance is effectively solved by structural methods and encapsulation methods.

[0117] The present invention has been described in detail above in combination with specific embodiments and exemplary examples, but these descriptions should not be construed as limitations on the present invention. Those skilled in the art understand that without departing from the spirit and scope of the present invention, various equivalent substitutions, modifications or improvements can be made to the technical solutions and their implementation manners of the present invention, and these all fall within the scope of the present invention. The protection scope of the present invention is subject to the appended claims.

[0118] The content not described in detail in the specification of the present invention belongs to the well-known technology of those skilled in the art.

Claims

1. A dual combustion system for a hand-held torch, characterized in that, It includes a first combustion system (1) and a second combustion system (2) located inside the torch housing (101); The first combustion system (1) includes a fuel storage tank (11), a first burner (13), and a valve (12) provided between the fuel storage tank (11) and the first burner (13). The fuel storage tank (11) supplies fuel to the first burner (13) after the valve (12) is opened; The second combustion system (2) includes a gas-electric integrated plugging device (21), an integrated ignition and flame detection (25), and a second burner (24); The gas-electric integrated plugging device (21) includes a first plugging part and a second plugging part. The first plugging part is connected to an external gas source, and the second plugging part is connected to the second burner (24); When the first plugging part and the second plugging part are plugged together, the external gas source supplies fuel to the second burner (24). The integrated ignition and flame detection (25) is used to perform flame detection on the second burner (24) and output the flame detection result to an external ignition control system. When the external ignition control system determines that the second burner (24) has gone out based on the flame detection result, it controls the integrated ignition and flame detection (25) to ignite the second burner (24); The ignition method of the second burner (24) is to be ignited by an external fire source or by the first burner (13), and the ignition method of the first burner (13) is to be ignited by an external fire source or by the second burner (24); The first plugging part includes a base (201), a base core (202), a lower insulator (211), a lower gas pipeline (221), a first cable (213), and a female electrical contact for ignition; The base core (202) is fixedly installed on the base (201). The base core (202) is provided with a lower gas chamber and a lower circuit chamber. The lower gas chamber is located at the center of the base core (202), and the lower circuit chamber is located outside the lower gas chamber; The lower insulator (211) is arranged outside the lower gas chamber. The female electrical contact for ignition is assembled in the lower insulator (211). The first cable (213) connected to the tail of the female electrical contact for ignition passes through the lower circuit chamber and is connected to the integrated ignition and flame detection (25); The lower gas pipeline (221) is arranged in the lower gas chamber, and the lower gas pipeline (221) is connected to an external gas source; The second plugging part includes an upper gas pipeline (121), a male electrical contact for ignition, a second cable (113), and an upper insulator (111); The upper gas pipeline (121) is fixed at the center of the torch housing (101), and the upper gas pipeline (121) is connected to the second burner (24); The upper insulator (111) is arranged outside the upper gas pipeline (121). The male electrical contact for ignition is assembled in the upper insulator (111). The second cable (113) connected to the tail of the male electrical contact for ignition is connected to the second burner (24); When the first plugging part and the second plugging part are plugged together, the base (201) locks the torch housing (101), the upper gas pipeline (121) and the lower gas pipeline (221) are connected, and the male electrical contact for ignition and the female electrical contact for ignition are connected.

2. The dual combustion system for a handheld torch according to claim 1, wherein, The first insertion part and the second insertion part are respectively provided with a lower gas pipeline (221) and an upper gas pipeline (121), and the upper gas pipeline (121) is connected to the second burner (24) by a pipeline (22); The pipeline (22) includes a lower rigid pipe, an upper rigid pipe and a metal hose (222) connected in sequence. Among them, the lower end of the lower rigid pipe is connected to the upper gas pipeline (121), and the upper end of the metal hose (222) is connected to the second burner (24); the lower rigid pipe is arranged inside the torch housing (101), and the upper rigid pipe is independent of the torch housing (101); the torch housing (101) with the lower rigid pipe arranged inside is formed by 3D printing; The torch housing (101) is formed by assembling an upper housing and a lower housing. The gas-electric integrated insertion device (21) is located inside the lower housing. After connecting the upper gas pipeline (121) and the second burner (24) by the pipeline (22), the upper housing and the lower housing are assembled, and the second burner (24) is located inside the upper housing.

3. The dual combustion system for a hand-held torch according to claim 1, characterized in that, The gas-electric integrated insertion device (21) further includes an insertion-in-place feedback mechanism; The insertion-in-place feedback mechanism includes 2 female electrical contacts for feedback, 2 male electrical contacts for feedback and an energization induction circuit; The female electrical contacts for feedback are assembled in the lower insulator (211), and the first cable (213) connected to the tail of the female electrical contacts for feedback passes through the lower circuit cavity and is connected to the energization induction circuit; The male electrical contacts for feedback are assembled in the upper insulator (111), and the two second cables (113) connected to the tails of the 2 male electrical contacts for feedback are short-circuited; When the first insertion part and the second insertion part are inserted, the female electrical contacts for feedback and the male electrical contacts for feedback are connected, and the energization induction circuit judges whether the first insertion part and the second insertion part are inserted in place. When inserted in place, an insertion-in-place signal is sent to the external ignition control system. After receiving the insertion-in-place signal, the external ignition control system controls the integrated ignition and flame detection (25) to ignite the second burner (24) when it judges that the second burner (24) has gone out according to the flame detection result; The number of the lower circuit cavities is equal to the total number of the female electrical contacts for feedback and the female electrical contacts for ignition, and the lower circuit cavities are independent of each other.

4. A dual combustion system for a handheld torch according to claim 1, wherein, The base (201) includes a first seat body, a second seat body arranged on the first seat body and a locking device (230); The torch housing (101) is provided with a locking hole (104); The second seat body is of a cylindrical structure, and the base core (202) is located inside the second seat body and fixedly connected to the first seat body; there is a gap for accommodating the torch housing (101) between the inner wall of the second seat body and the outer wall of the base core (202); The side wall of the second seat body is provided with an outward protrusion, and a pin hole penetrating the side wall is arranged inside the protrusion; the direction of the pin hole is perpendicular to the axis of the second seat body; The locking device (230) includes an external nut (231), a spring (232) and a pin shaft (233); the spring (232) is sleeved outside the pin shaft (233), the first end of the pin shaft (233) is inserted into the pin hole, the second end is fixedly connected to the external nut (231), and the external nut (231) is screwed to the outer surface of the protrusion; The end face of the first end of the pin shaft (233) is an inclined plane. When the first insertion part and the second insertion part are inserted, the torch housing (101) enters downward into the gap formed between the inner wall of the second seat body and the outer wall of the base core (202) and contacts the inclined plane, pushing the pin shaft (233) outward and compressing the spring (232) until the locking hole provided on the torch housing (101) is aligned with the pin shaft (233). The pin shaft (233) enters the locking hole under the action of the spring (232) to realize the locking of the base (201) to the torch housing (101).

5. A dual combustion system for a handheld torch according to claim 1, wherein, The lower end of the lower gas pipeline (221) is screwed to the inner wall of the lower gas chamber, and the upper end of the upper gas pipeline (121) is screwed to the torch housing (101). When the first insertion part and the second insertion part are inserted, the upper end of the lower gas pipeline (221) and the lower end of the upper gas pipeline (121) are inserted, and the outer wall of the upper end of the lower gas pipeline (221) cooperates with the inner wall of the lower end of the upper gas pipeline (121). The mating position is sealed with ≥3 O-rings; The surface of the O-ring and the inner wall of the upper gas pipeline (121) are coated with grease, and the apparent viscosity of the grease at the service temperature is ≤700 Pa·s; The upper end of the lower gas chamber is a flared mouth with a larger upper part and a smaller lower part.

6. A dual combustion system for a hand-held torch according to claim 3, wherein, The lower insulator (211) is a cylindrical structure provided outside the lower gas chamber, and the inner wall of the lower insulator (211) contacts the outer wall of the lower gas chamber; The male electric contact for ignition and the male electric contact for feedback are collectively referred to as male electric contacts, and the female electric contact for ignition and the female electric contact for feedback are collectively referred to as female electric contacts; The female electric contact is assembled between the inner wall and the outer wall of the lower insulator (211); The upper insulator (111) is a cylindrical structure provided outside the upper gas pipeline (121), and the male electric contact is assembled between the inner wall and the outer wall of the upper insulator (111); Each lower circuit chamber is evenly distributed circumferentially outside the lower gas chamber, and the female electric contacts are evenly distributed outside the lower gas chamber.

7. A dual combustion system for a hand-held torch according to claim 6, wherein The female electric contact and the male electric contact are respectively fixed in the lower insulator (211) and the upper insulator (111) by the press-fit method; The head position of the female electric contact is lower than the upper end of the lower insulator (211); The head of the male electric contact extends out of the upper insulator (111); When the first insertion part and the second insertion part are inserted, the upper end of the lower insulator (211) and the lower end of the upper insulator (111) cooperate, and the heads of the female electric contact and the male electric contact are connected; A chamfer is provided at the upper end of the outer wall of the lower insulator (211), and a boss (1111) matching the chamfer is left at the lower end of the outer wall of the upper insulator (111); The upper end of the inner wall of the lower insulator (211) is higher than the upper end of the lower gas chamber, and the upper end of the lower gas pipeline (221) is lower than the upper end of the lower gas chamber; A circumferential boss (2112) is provided at the upper end of the inner wall of the lower insulator (211), and a circumferential groove (1112) matching the circumferential boss (2112) is provided at the lower end of the inner wall of the upper insulator (111); A lower insulator groove (214) and an upper insulator groove (114) are respectively provided in the lower insulator (211) and the upper insulator (111); The connection between the female electrical contact and the first cable (213) is located in the lower insulator groove (214), and the connection between the male electrical contact and the second cable (113) is located in the upper insulator groove (114). The lower insulator groove (214) and the upper insulator groove (114) are filled with insulating glue.

8. A dual combustion system for a hand-held torch according to claim 6, characterized in that, The outer diameter of the lower insulator (211) is equal to the maximum outer diameter of the base core (202); the outer wall surface of the lower insulator (211) and the outer wall surface of the base core (202) form a continuous cylindrical wall surface; An axial limiting groove (240) is provided on the cylindrical wall surface, and an axial limiting protrusion (103) is provided on the inner wall of the torch housing (101). When the first insertion part and the second insertion part are inserted, the limiting groove (240) and the limiting protrusion (103) cooperate for circumferential limiting.

9. The combustion method of the dual combustion system for a hand-held torch according to any one of claims 1-8, characterized in that, Comprising: Before the first insertion part and the second insertion part in the second combustion system (2) are inserted, the fuel storage tank (11) in the first combustion system (1) supplies fuel to the first burner (13), and the first burner (13) is ignited by an external fire source; After the first insertion part and the second insertion part in the second combustion system (2) are inserted, an external gas source supplies fuel to the second burner (24), the first burner (13) ignites the second burner (24), and the first burner (13) and the second burner (24) burn simultaneously; After the gas in the fuel storage tank (11) is exhausted, the first burner (13) goes out, and the second burner (24) continues to burn; the integrated ignition and flame detection (25) is used to perform flame detection on the second burner (24) and output the flame detection result to an external ignition control system. The external ignition control system controls the integrated ignition and flame detection (25) to ignite the second burner (24) when it judges that the second burner (24) has gone out according to the flame detection result; Or comprising: The first insertion part and the second insertion part in the second combustion system (2) are inserted, an external gas source supplies fuel to the second burner (24), and the second burner (24) is ignited by an external fire source; the integrated ignition and flame detection (25) is used to perform flame detection on the second burner (24) and output the flame detection result to an external ignition control system. The external ignition control system controls the integrated ignition and flame detection (25) to ignite the second burner (24) when it judges that the second burner (24) has gone out according to the flame detection result; The valve (12) in the first combustion system (1) is opened, the second burner (24) ignites the first burner (13), and the first burner (13) and the second burner (24) burn simultaneously; When the first insertion part and the second insertion part in the second combustion system (2) are separated, the second burner (24) goes out, and the first burner (13) continues to burn until the gas in the fuel storage tank (11) is exhausted or the valve (12) is closed.

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