A connection for a gas cylinder to a lance

Abstract

The utility model provides a kind of connecting piece of fire gun and gas tank, it includes: gas tank connecting ring, lance head connecting seat and sealing heat insulation sleeve, the lance head connecting seat is fixed in lance head bottom after passing through the gas tank connecting ring, the gas tank connecting ring is abutted in lance head bottom;Lance head bottom is equipped with accommodating groove, the top of lance head connecting seat is equipped with abutment groove, the abutment groove is abutted in the accommodating groove of sealing heat insulation sleeve, the lance head connecting seat is equipped with the first gas nozzle perforation that it is through itself in the position of the abutment groove, the sealing heat insulation sleeve is equipped with the second gas nozzle perforation in the position corresponding the first gas nozzle perforation, gas nozzle in the top of gas tank is sequentially through the first gas nozzle perforation and the second gas nozzle perforation after stretching into lance head;The side of the gas tank connecting ring is equipped with limit block, the bottom of gas tank is equipped with annular connecting mouth around gas nozzle, annular connecting mouth is equipped with clamping gap, the limit block clamps the clamping gap.

Description

Technical Field

[0001] This utility model belongs to the technical field of gas container connectors, and specifically relates to a connector between a flame gun and a gas tank. Background Technology

[0002] Flame guns typically use a mixture of fuel (such as propane or butane) and oxygen to generate a flame, which is then propelled out through a nozzle structure at the top of the flame gun. Flame guns are generally used in specific work scenarios, such as localized heating before welding in certain industrial processes, metal surface treatment, etc.; in field exploration, they may also be used for ignition in emergency situations.

[0003] Existing technology discloses a patent with patent number ZL202421792921.1, entitled "A Connector for Preventing the Spray Gun from Loosening its Gas Tank," which discloses that a groove is formed on the lower part of the spray gun body, and a connector is fixedly connected to the inside of the groove via a connecting rod. The connector has a first sealing groove, and a snap-fit ​​assembly is provided above the connector. The snap-fit ​​assembly includes a rotating component; a lever is fixedly installed on one side of the rotating component; several evenly distributed annular blocks are fixedly installed on the rotating component, and keyways are formed on the annular blocks. A stop is provided on one side of the keyway. The rib component has several evenly distributed key blocks and protrusions fixedly installed on it. The key blocks are engaged with the keyways. A fixing component is provided on the other side of the rib component. One end of the fixing component corresponds to the protrusion, and the fixing component has a second sealing groove. A sealing component is provided on the second sealing groove. The other side of the sealing component is in contact with the first sealing groove. The fixing component passes through the rotating component and the rib component and abuts against the connecting component. Both the fixing component and the connecting component have several evenly distributed screw holes, and positioning screws are threaded onto the screw holes.

[0004] Although the aforementioned patents have solved some technical problems, they involve a large amount of materials and have relatively high production costs. Therefore, how to reduce production costs while ensuring a stable connection between the gas canister and the flame gun is a technical problem that urgently needs to be solved. Utility Model Content

[0005] The main purpose of this utility model is to provide a connector for a flame gun and a gas tank. It has a simple structure and reduces the amount of material used. It can stably install the flame gun on the top of the gas tank while reducing production costs, which is conducive to the promotion of the connector between the flame gun and the gas tank.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A connector for a flamethrower and a gas cylinder includes: a gas cylinder connecting ring, a flamethrower head connecting seat, and a sealing and heat-insulating sleeve. The flamethrower head connecting seat passes through the gas cylinder connecting ring and is fixed to the bottom of the flamethrower head, pressing the gas cylinder connecting ring against the bottom of the flamethrower head. The bottom of the flamethrower head has a receiving groove, and the top of the flamethrower head connecting seat has an abutment groove. The abutment groove abuts the sealing and heat-insulating sleeve against the receiving groove. The flamethrower head connecting seat has a first nozzle through-hole at the abutment groove. The sealing and heat-insulating sleeve has a second nozzle through-hole at the position corresponding to the first nozzle through-hole. The nozzle at the top of the gas cylinder passes through the first nozzle through-hole and the second nozzle through-hole in sequence and extends into the flamethrower head. A limiting block is provided on one side of the gas cylinder connecting ring, and an annular connecting port is provided around the nozzle at the bottom of the gas cylinder. The annular connecting port has a snap-fit ​​notch, and the limiting block snaps into the snap-fit ​​notch.

[0007] As a preferred embodiment of the connector between the flame gun and the gas canister, the outer side of the flame gun head connector extends outward to form a fixing protrusion. The fixing protrusion is provided with a fixing through hole that penetrates it. The bottom of the flame gun head is provided with a fixing hole. The fixing bolt passes through the fixing through hole and extends into the fixing hole for fixing.

[0008] As a preferred embodiment of the connector between the flame gun and the gas cylinder, the connector further includes: a first sealing ring and a second sealing ring; the top outer side of the sealing and heat insulation sleeve is provided with a first sealing ring groove, and after the first sealing ring is embedded in the first sealing ring groove, the sealing and heat insulation sleeve abuts the first sealing ring against the groove wall of the receiving groove; the bottom opening of the second gas nozzle perforation is recessed inward to form a second sealing ring groove, and after the second sealing ring is embedded in the second sealing ring groove, the sealing and heat insulation sleeve abuts the second sealing ring against the outer side of the gas nozzle at the top of the gas cylinder.

[0009] As a preferred embodiment of the connector between the flame gun and the gas canister, the flame gun head connector is recessed inward at the position corresponding to the first gas nozzle through hole to form a gas nozzle fixing groove. The gas nozzle fixing groove is connected to the first gas nozzle through hole and is used to lock the base of the gas nozzle.

[0010] As a preferred embodiment of the connector between the flame gun and the gas cylinder, the gas cylinder connecting ring extends toward the flame gun head connecting seat to form an abutting protrusion, and the edge of the flame gun head connecting seat extends outward to form an abutting convex edge, which abuts against the abutting protrusion to press the gas cylinder connecting ring tightly against the bottom of the flame gun head.

[0011] As a preferred embodiment of the connector between the flame gun and the gas canister, the flame gun head connector is provided with a positioning groove at the position corresponding to the abutment protrusion, and the abutment protrusion engages with the positioning groove.

[0012] As a preferred embodiment of the connector between the flame gun and the gas cylinder, the connector further includes: a snap-fit ​​ball; the abutting protrusion is provided with a snap-fit ​​groove, the diameter of the outer opening and the inner opening of the snap-fit ​​groove is smaller than the diameter of the snap-fit ​​ball, and the diameter of the middle part of the snap-fit ​​groove is greater than or equal to the diameter of the snap-fit ​​ball. After the snap-fit ​​ball is snapped into the snap-fit ​​groove, the snap-fit ​​ball partially protrudes outward from the external opening of the snap-fit ​​groove to snap into the snap-fit ​​ring groove on the top of the gas tank.

[0013] As a preferred embodiment of the connector between the flame gun and the gas canister, the inner wall of the middle part of the snap-fit ​​groove is arc-shaped to fit against the outer side of the snap-fit ​​ball, which is used to abut against the outer side of the snap-fit ​​ball and to facilitate the positioning of the snap-fit ​​ball.

[0014] As a preferred embodiment of the connector between the flame gun and the gas canister, the bottom of the gas canister connecting ring is provided with a positioning ring groove, and the bottom of the gas canister is provided with a positioning protrusion at the position corresponding to the positioning ring groove. After the connector between the flame gun and the gas canister is installed on the top of the gas canister, the positioning protrusion is embedded in the positioning ring groove.

[0015] As a preferred embodiment of the connection between the flame gun and the gas canister, the sealing and heat insulation sleeve, the first sealing ring, and the second sealing ring are made of plastic material that is resistant to the temperature of gas combustion flames.

[0016] The beneficial effects of this utility model are: This utility model provides a connector for a flamethrower and a gas cylinder, comprising: a gas cylinder connecting ring, a flamethrower head connecting seat, and a sealing and heat-insulating sleeve. The flamethrower head connecting seat passes through the gas cylinder connecting ring and is fixed to the bottom of the flamethrower head, pressing the gas cylinder connecting ring against the bottom of the flamethrower head. The bottom of the flamethrower head has a receiving groove, and the top of the flamethrower head connecting seat has an abutting groove. The sealing and heat-insulating sleeve abuts against the receiving groove. The flamethrower head connecting seat has a first nozzle through-hole at the abutting groove, and the sealing and heat-insulating sleeve has a second nozzle through-hole corresponding to the first nozzle through-hole. The nozzle at the top of the gas cylinder passes through the second nozzle through-hole in sequence. One air nozzle is perforated and the second air nozzle is perforated and then inserted into the nozzle head; a limiting block is provided on one side of the gas tank connecting ring, and an annular connecting port is provided around the bottom of the gas tank around the air nozzle. The annular connecting port has a snap-fit ​​notch, and the limiting block snaps into the snap-fit ​​notch to prevent the connector between the flame gun and the gas tank from falling off the top of the gas tank; compared with the solution in the prior art, the above solution has fewer parts and lower production costs. Moreover, the sealing and heat insulation sleeve is set inside the connector between the flame gun and the gas tank. With the reduction of its own material, its sealing effect is better, which is conducive to the promotion of the connector between the flame gun and the gas tank. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and all of them fall within the protection scope of this utility model. Figure 1 This is a schematic diagram of the connection between the flame gun and the gas tank and the flame gun head shown in this utility model; Figure 2 yes Figure 1 The diagram shows the connection between the flamethrower and the gas tank, as well as a cross-sectional view of the flamethrower head. Figure 3 yes Figure 1 The diagram shows the connection between the flamethrower and the gas tank, as well as the explosion diagram of the flamethrower head. Figure 4 yes Figure 3 A schematic diagram of the nozzle structure in the connector between the flamethrower and the gas tank; Figure 5 yes Figure 3 The diagram shows a structural schematic of the nozzle head connector at one angle of the connector between the flame gun and the gas tank. Figure 6 yes Figure 5 A schematic diagram of the nozzle head connector of the flamethrower and gas tank connection at another angle; Figure 7 yes Figure 3 The diagram shows the structure of the sealing and heat insulation gasket of the connection between the flame gun and the gas tank. Figure 8 yes Figure 3 The diagram shows the structure of the gas tank connecting ring of the connector between the flamethrower and the gas tank; Figure 9 yes Figure 3 The diagram shows the structure of the gas tank in the connector between the flamethrower and the gas tank. Detailed Implementation

[0018] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a rotatable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Flame guns typically use a mixture of fuel (such as propane or butane) and oxygen to generate a flame, which is then propelled out through a nozzle structure at the top of the flame gun. Flame guns are generally used in specific work scenarios, such as localized heating before welding in certain industrial processes, metal surface treatment, etc.; in field exploration, they may also be used for ignition in emergency situations.

[0021] Existing technology discloses a patent with patent number ZL202421792921.1, entitled "A Connector for Preventing the Spray Gun from Loosening its Gas Tank," which discloses that a groove is formed on the lower part of the spray gun body, and a connector is fixedly connected to the inside of the groove via a connecting rod. The connector has a first sealing groove, and a snap-fit ​​assembly is provided above the connector. The snap-fit ​​assembly includes a rotating component; a lever is fixedly installed on one side of the rotating component; several evenly distributed annular blocks are fixedly installed on the rotating component, and keyways are formed on the annular blocks. A stop is provided on one side of the keyway. The rib component has several evenly distributed key blocks and protrusions fixedly installed on it. The key blocks are engaged with the keyways. A fixing component is provided on the other side of the rib component. One end of the fixing component corresponds to the protrusion, and the fixing component has a second sealing groove. A sealing component is provided on the second sealing groove. The other side of the sealing component is in contact with the first sealing groove. The fixing component passes through the rotating component and the rib component and abuts against the connecting component. Both the fixing component and the connecting component have several evenly distributed screw holes, and positioning screws are threaded onto the screw holes.

[0022] Although the aforementioned patents have solved some technical problems, they involve a large amount of materials and have relatively high production costs. Therefore, how to reduce production costs while ensuring a stable connection between the gas canister and the flame gun is a technical problem that urgently needs to be solved.

[0023] like Figure 1 , Figure 2 and Figure 3As shown, the utility model embodiment provides a connector for a flame gun and a gas cylinder, which includes: a gas cylinder connecting ring 10, a flame gun head connecting seat 20, a sealing and heat insulation sleeve 30, a first sealing ring 40, a second sealing ring 50, and a snap-fit ​​ball 60. The flame gun head connecting seat 20 passes through the gas cylinder connecting ring 10 and is fixed to the bottom of the flame gun head, thereby pressing the gas cylinder connecting ring 10 against the bottom of the flame gun head. The bottom of the spray gun head 70 is provided with a receiving groove 71, and the top of the spray gun head connecting seat 20 is provided with an abutment groove 21. The abutment groove 21 abuts the sealing heat insulation sleeve 30 against the receiving groove 71. The spray gun head connecting seat 20 is provided with a first air nozzle through hole 22 through itself at the position of the abutment groove 21. The sealing heat insulation sleeve 30 is provided with a second air nozzle through hole 31 at the position corresponding to the first air nozzle through hole 22. The air nozzle 81 at the top of the air tank 80 passes through the first air nozzle through hole 22 and the second air nozzle through hole 31 in sequence and extends into the spray gun head 70. The first sealing ring 40 is installed on the upper part of the sealing heat insulation sleeve 30 for further sealing of the upper part of the sealing heat insulation sleeve 30. The second sealing ring 50 is installed on the lower part of the sealing heat insulation sleeve 30 for further sealing of the lower part of the sealing heat insulation sleeve 30. A limiting block 11 is provided on one side of the gas tank connecting ring 10. An annular connection port 82 is provided around the gas nozzle 81 at the bottom of the gas tank 80. The annular connection port 82 is provided with a snap-fit ​​notch 821. The limiting block snaps into the snap-fit ​​notch 821. After the snap-fit ​​ball 60 is installed on the gas tank connecting ring 10, it is used to snap into the snap-fit ​​ring groove 83 at the top of the gas tank 80.

[0024] In this utility model, the above-mentioned solution reduces the number of parts and lowers the production cost compared to the solution in the background art. Moreover, by placing the sealing and heat insulation sleeve 30 inside the connection between the flame gun and the gas tank, the sealing effect is better while reducing its own material, which is conducive to the promotion of the connection between the flame gun and the gas tank.

[0025] like Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, in order to fix the spray gun head connector 20, the outer side of the spray gun head connector 20 extends outward to form a fixing protrusion 23. The fixing protrusion 23 is provided with a fixing through hole 231 that passes through it. The bottom of the spray gun head 70 is provided with a fixing hole 72. The fixing bolt passes through the fixing through hole 231 and extends into the fixing hole 72 for fixing, thereby fixing the spray gun head connector 20 to the bottom of the spray gun head 70.

[0026] To install the first sealing ring 40 and the second sealing ring 50, a first sealing ring groove 32 is provided on the outer top of the sealing heat insulation sleeve 30. After the first sealing ring 40 is embedded in the first sealing ring groove 32, the sealing heat insulation sleeve 30 abuts the first sealing ring 40 against the groove wall of the receiving groove 71, thereby further sealing the upper part of the sealing heat insulation sleeve 30 and preventing air leakage from the upper part of the sealing heat insulation sleeve 30. The bottom opening of the second air nozzle perforation 31 is recessed inward to form a second sealing ring groove 33. After the second sealing ring 50 is embedded in the second sealing ring groove 33, the sealing heat insulation sleeve 30 abuts the second sealing ring 50 against the outer side of the air nozzle 81 at the top of the gas tank 80, thereby further sealing the lower part of the sealing heat insulation sleeve 30 and preventing air leakage from the lower part of the sealing heat insulation sleeve 30.

[0027] To protect the nozzle 81, the spray gun head connecting seat 20 is recessed inward at the position corresponding to the first nozzle through hole 22 to form a nozzle fixing groove 24. The nozzle fixing groove 24 is connected to the first nozzle through hole 22. The nozzle fixing groove 24 is used to lock the base 811 of the nozzle and to protect the nozzle 81 and prevent the nozzle 81 from bending.

[0028] In order to install the gas cylinder connecting ring 10, the gas cylinder connecting ring 10 extends toward the spray gun head connecting seat 20 to form an abutting protrusion 12, and the edge of the spray gun head connecting seat 20 extends outward to form an abutting protrusion 25. The abutting protrusion 25 abuts against the abutting protrusion 12, thus pressing the gas cylinder connecting ring 10 against the bottom of the spray gun head 70.

[0029] In order to position the gas tank connecting ring 10 for installation, the spray gun head connecting seat 20 is provided with a positioning groove 26 at the position corresponding to the abutment protrusion 12. The abutment protrusion 12 engages with the positioning groove 26, thereby positioning the gas tank connecting ring 10 relative to the spray gun head connecting seat 20.

[0030] To install the snap-fit ​​ball 60, the abutment protrusion 12 is provided with a snap-fit ​​groove 121. The diameters of the outer and inner openings of the snap-fit ​​groove 121 are smaller than the diameter of the snap-fit ​​ball 60, while the diameter of the middle part of the snap-fit ​​groove 121 is greater than or equal to the diameter of the snap-fit ​​ball 60. After the snap-fit ​​ball 60 snaps into the snap-fit ​​groove 121, the snap-fit ​​ball 60 partially protrudes outward from the outer opening of the snap-fit ​​groove 121 to snap into the snap-fit ​​ring groove 83 at the top of the gas tank 80, further fixing the connector between the flame gun and the gas tank 80 to the top of the gas tank 80.

[0031] To prevent the snap-fit ​​ball 60 from wobbling, the inner wall of the middle part of the snap-fit ​​groove 121 is arc-shaped to fit against the outer side of the snap-fit ​​ball 60, which is used to abut against the outer side of the snap-fit ​​ball 60, so as to limit the snap-fit ​​ball 60 and prevent the snap-fit ​​ball 60 from wobbling relative to the snap-fit ​​groove 121. At the same time, it also facilitates the rotation of the snap-fit ​​ball 60 and facilitates the snap-fit ​​ball 60 to snap into the snap-fit ​​ring groove 83.

[0032] In order to position the gas tank connecting ring 10 on the top of the gas tank 80, the bottom of the gas tank connecting ring 10 is provided with a positioning ring groove 13, and the bottom of the gas tank 80 is provided with a positioning protrusion 84 at the position corresponding to the positioning ring groove 13. After the flame gun and the gas tank 80 connector are installed on the top of the gas tank 80, the positioning protrusion 84 is embedded in the positioning ring groove 13, thereby facilitating the positioning of the gas tank connecting ring 10 on the top of the gas tank 80.

[0033] In this utility model, the sealing and heat insulation sleeve 30, the first sealing ring 40, and the second sealing ring 50 are made of plastic material that is resistant to the flame temperature of gas combustion. However, this utility model is not limited to this utility model. The sealing and heat insulation sleeve 30, the first sealing ring 40, and the second sealing ring 50 can also be made of materials such as metal rubber or polytetrafluoroethylene. As long as the materials of the sealing and heat insulation sleeve 30, the first sealing ring 40, and the second sealing ring 50 can achieve the problems of sealing gas and resisting gas combustion, this utility model does not limit them in this regard.

[0034] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and not for limiting the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, these obvious variations or modifications arising from the essential spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A connector for a flamethrower and a gas canister, characterized in that, include: The gas tank connecting ring, the spray gun head connecting seat, and the sealing and heat insulation sleeve are provided. The spray gun head connecting seat passes through the gas tank connecting ring and is fixed to the bottom of the spray gun head, thereby pressing the gas tank connecting ring against the bottom of the spray gun head. The bottom of the spray gun head is provided with a receiving groove, and the top of the spray gun head connecting seat is provided with an abutting groove. The abutting groove abuts the sealing and heat insulation sleeve against the receiving groove. The spray gun head connecting seat is provided with a first air nozzle through hole at the position of the abutting groove. The sealing and heat insulation sleeve is provided with a second air nozzle through hole at the position corresponding to the first air nozzle through hole. The air nozzle at the top of the air tank passes through the first air nozzle through hole and the second air nozzle through hole in sequence and extends into the spray gun head. A limiting block is provided on one side of the gas tank connecting ring, and an annular connecting port is provided around the gas nozzle at the bottom of the gas tank. The annular connecting port has a snap-fit ​​notch, and the limiting block snaps into the snap-fit ​​notch.

2. The connector between the flamethrower and the gas canister as described in claim 1, characterized in that, The outer side of the spray gun head connector extends outward to form a fixing protrusion. The fixing protrusion has a fixing hole that penetrates through it. The bottom of the spray gun head has a fixing hole. The fixing bolt passes through the fixing hole and extends into the fixing hole for fixing.

3. The connector between the flamethrower and the gas canister as described in claim 1, characterized in that, The connector between the flame gun and the gas tank also includes: a first sealing ring and a second sealing ring; The top outer side of the sealing and heat insulation sleeve is provided with a first sealing ring groove. After the first sealing ring is embedded in the first sealing ring groove, the sealing and heat insulation sleeve abuts the first sealing ring against the groove wall of the receiving groove. The bottom opening of the second air nozzle perforation is recessed inward to form a second sealing ring groove. After the second sealing ring is embedded in the second sealing ring groove, the sealing and heat insulation sleeve abuts the second sealing ring against the outside of the air nozzle at the top of the air tank.

4. The connector between the flamethrower and the gas canister as described in claim 1, characterized in that, The spray gun head connector is recessed inward at the position corresponding to the first nozzle through hole to form a nozzle fixing groove. The nozzle fixing groove is connected to the first nozzle through hole and is used to lock the base of the nozzle.

5. The connector between the flamethrower and the gas canister as described in claim 1, characterized in that, The gas cylinder connecting ring extends toward the spray gun head connecting seat to form an abutting protrusion, and the edge of the spray gun head connecting seat extends outward to form an abutting protrusion. The abutting protrusion abuts against the abutting protrusion, pressing the gas cylinder connecting ring tightly against the bottom of the spray gun head.

6. The connector between the flamethrower and the gas canister as described in claim 5, characterized in that, The spray gun head connector has a positioning groove at the position corresponding to the abutment protrusion, and the abutment protrusion engages with the positioning groove.

7. The connector between the flamethrower and the gas canister as described in claim 5, characterized in that, The connector between the flame gun and the gas tank also includes: a snap-fit ​​ball; The abutting protrusion is provided with a snap-fit ​​groove. The diameter of the outer opening and the inner opening of the snap-fit ​​groove is smaller than the diameter of the snap-fit ​​ball, and the diameter of the middle part of the snap-fit ​​groove is greater than or equal to the diameter of the snap-fit ​​ball. After the snap-fit ​​ball is snapped into the snap-fit ​​groove, the snap-fit ​​ball partially protrudes outward from the external opening of the snap-fit ​​groove to snap into the snap-fit ​​ring groove on the top of the gas tank.

8. The connector between the flamethrower and the gas canister as described in claim 7, characterized in that, The inner wall of the middle part of the snap-fit ​​groove is arc-shaped and fits against the outer side of the snap-fit ​​ball, which is used to abut against the outer side of the snap-fit ​​ball and to limit the snap-fit ​​ball.

9. The connector between the flamethrower and the gas canister as described in claim 1, characterized in that, The bottom of the gas tank connecting ring is provided with a positioning ring groove, and the bottom of the gas tank is provided with a positioning protrusion at the position corresponding to the positioning ring groove. After the flame gun and the gas tank connecting part are installed on the top of the gas tank, the positioning protrusion is embedded in the positioning ring groove.

10. The connector between the flamethrower and the gas canister as described in claim 3, characterized in that, The sealing and heat insulation sleeve, the first sealing ring, and the second sealing ring are made of plastic material that is resistant to the temperature of gas combustion flames.

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