Gun head of flame gun

Abstract

The utility model belongs to the technical field of flame guns, and particularly relates to a flame gun head which comprises a gun body and a preheating piece, one end of the gun body is provided with a connecting portion used for being connected with an air source, and the other end of the gun body is provided with a gun barrel. The preheating part is connected to the side, close to the gun barrel, of the gun body and comprises a flow guide pipe, and the flow guide pipe is used for enabling fuel fluid entering the gun body to surround the inner wall of the gun head by a circle and then enter the gun barrel; according to the design, fuel fluid is guided into the gun barrel after being subjected to heat transfer at the gun head to eliminate tiny liquid beads, potential safety hazards caused by the fact that the tiny liquid beads enter the gun barrel are effectively avoided, the flow guide pipe surrounds the inner wall of the gun head by a circle, the heat transfer effect on the fuel fluid can be improved, and it is guaranteed that the tiny liquid beads possibly existing in airflow are vaporized; and the use safety and reliability of the flame gun are improved.

Description

Technical Field

[0001] This utility model belongs to the field of flamethrower technology, and in particular relates to a flamethrower nozzle. Background Technology

[0002] A flame gun nozzle is a device installed on a fuel canister to ignite the fuel fluid sprayed from the canister and eject it in a specific flame pattern for purposes such as heating, welding, and cutting. It is widely used in industrial, household, and outdoor settings, and is particularly convenient when installed on portable fuel canisters.

[0003] Fuel in fuel canisters (such as butane and propane) is stored in a liquid state at room temperature, and there is a certain pressure inside the canister (generated by the vaporization of liquid fuel). Therefore, when the valve is opened, the gaseous fuel on the liquid surface will be sprayed out through the nozzle of the flame gun and ignited to form a flame. However, when using a handheld flame gun, it is impossible to tilt or shake the fuel canister to a small degree. This can easily cause the sprayed gas to carry a small amount of fine liquid droplets. If the tilt angle is large or the shaking is violent, the fine liquid droplets will be carried out more, which will lead to incomplete combustion and imbalance of fuel gas flow speed, posing a significant safety hazard. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned technical problems by providing a flame gun head that can transfer heat and vaporize small liquid droplets accidentally carried out by the airflow, thereby preventing these droplets from affecting combustion or causing airflow velocity imbalance and improving safety in use.

[0005] In view of this, the present invention provides a flamethrower nozzle, comprising:

[0006] The gun body has a connection part for connecting to the gas source at one end and a gun barrel at the other end, with a gun head formed at the end of the gun barrel away from the gun body;

[0007] The preheating component is connected to the side of the gun body near the barrel.

[0008] The preheating component includes a flow guide tube, which is used to guide the fuel fluid entering the gun body to first circulate around the inner wall of the gun head before entering the gun barrel.

[0009] Furthermore, the above technical solution also includes:

[0010] The tube is connected to the gun body at one end and to the nozzle at the other end;

[0011] A separator, installed inside the tube, is used to divide the tube into a first chamber and a second chamber.

[0012] The first chamber is connected to the inside of the gun body and one end of the flow guide tube, while the second chamber is connected to the nozzle and the other end of the flow guide tube.

[0013] Furthermore, the above technical solution also includes:

[0014] A fixing plate is installed on the side of the tube body, and both ends of the guide tube are connected to the fixing plate and extend to the first chamber and the second chamber respectively;

[0015] The fixing plate is detachably connected to the tank body, and the partition is a block-shaped partition.

[0016] In the above technical solution, further:

[0017] The flow guide includes an inlet section that communicates with the inside of the gun body, an outlet section that communicates with the barrel, and an annular section that surrounds the inner wall of the gun head.

[0018] Furthermore, the above technical solution also includes:

[0019] The fuse is coaxially mounted inside the barrel on one side of the gun head, and has multiple protrusions around its circumference that abut against the inner wall of the barrel.

[0020] Among them, a gap is formed between two adjacent protrusions to allow the inlet and outlet to pass through, and a groove for the annular part to be inserted is provided at the end of each protrusion near the gun head.

[0021] Furthermore, the above technical solution also includes:

[0022] The adjustment knob is mounted on the gun body and is used to adjust the amount of fuel fluid entering the gun body from the gas source;

[0023] The ignition device is installed inside the gun body and has an ignition wire extending into the fuse tube.

[0024] In the above technical solution, further:

[0025] An air inlet is provided on the barrel, and an adjusting sleeve is fitted on it to adjust the opening of the air inlet.

[0026] In the above technical solution, further:

[0027] A mixing chamber is formed inside the side of the detonator near the gun body, and a gas distribution component is provided inside the mixing chamber;

[0028] The gas distribution assembly includes an outer cylinder, an inner cylinder, and a connecting plate for connecting the outer cylinder and the inner cylinder. A direct flow channel is formed between the outer cylinder and the inner cylinder. A central flow channel and a partition plate for dividing the central flow channel into multiple flow channels are formed inside the inner cylinder. A guide plate for spiral outflow of fuel fluid is provided at one end of the outlet of each of the multiple flow channels.

[0029] The beneficial effects of this utility model are as follows:

[0030] 1. The ejected fuel fluid is directed to the nozzle through the guide tube. After heat transfer to eliminate small liquid droplets, it is then introduced into the barrel. This effectively avoids the safety hazards caused by small liquid droplets being carried out and entering the barrel. Furthermore, the guide tube is arranged around the inner wall of the nozzle to effectively improve the heat transfer effect of the fuel fluid in the guide tube, ensuring that any small liquid droplets that may exist in the airflow are vaporized.

[0031] 2. The pipe body is divided into a first chamber and a second chamber by a separator, which ensures that all fuel fluid coming out of the fuel tank must pass through the guide pipe, ensuring the vaporization of any small liquid droplets that may be carried in the fuel fluid. In addition, the two ends of the guide pipe are fixed by a fixing plate, which improves the installation stability of the two ends of the guide pipe and avoids leakage that may cause safety hazards.

[0032] 3. By setting the fuse tube and fixing it with multiple protrusions, it is easy for the guide tube to pass through the surface of the fuse tube. At the same time, the groove can facilitate the fixing of the other side of the guide tube, improving the structural stability of the guide tube.

[0033] 4. By setting up the gas distribution component, the mixing effect between fuel gas and air is improved, ensuring complete combustion and improving flame effect. It adopts a central flow channel and a direct flow channel around the central flow channel. After passing through the central flow channel, the fuel gas advances in a spiral manner. On the one hand, the centrifugal effect enhances the mixing effect, and on the other hand, the surrounding direct flow channel ensures the flow rate of fuel gas and avoids the risk of backfire, further improving the safety of use. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of this utility model;

[0035] Figure 2 This is a top view of the present invention;

[0036] Figure 3 This is a utility model Figure 2 Sectional view at point AA;

[0037] Figure 4 This is a structural schematic diagram of the preheating component of this utility model;

[0038] Figure 5 This is a schematic diagram of the structure of the gas distribution component of this utility model;

[0039] The markings in the diagram represent: 1. Gun body; 2. Connecting part; 3. Gun barrel; 4. Gun head; 5. Guide tube; 50. Inlet part; 51. Outlet part; 52. Annular part; 6. Tube body; 7. Nozzle; 8. Separator; 9. First chamber; 10. Second chamber; 11. Fixing plate; 12. Flame tube; 13. Protrusion; 14. Gap; 15. Groove; 16. Adjustment knob; 17. Ignition device; 18. Ignition wire; 19. Air inlet; 20. Adjustment sleeve; 21. Mixing chamber; 22. Gas distribution assembly; 220. Outer cylinder; 221. Inner cylinder; 222. Connecting plate; 223. Straight flow channel; 224. Central flow channel; 225. Separator; 226. Guide plate. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0041] Example 1:

[0042] This embodiment provides a flamethrower nozzle, including:

[0043] The gun body 1 has a connection part 2 for connecting to the gas source at one end and a gun barrel 3 at the other end, and a gun head 4 is formed at the end of the gun barrel 3 away from the gun body 1.

[0044] A preheating component is connected to the side of the gun body 1 near the barrel 3;

[0045] The preheating component includes a guide tube 5, which is used to guide the fuel fluid entering the gun body 1 to first circulate around the inner wall of the gun head 4 before entering the gun barrel 3.

[0046] Meanwhile, the guide pipe 5 is made of metal, and the gas source is a fuel tank.

[0047] As can be seen from this embodiment, the ejected fuel fluid is directed to the nozzle 4 through the guide tube 5. After heat transfer to eliminate small liquid droplets, it is then introduced into the nozzle 3. This effectively avoids the safety hazards caused by small liquid droplets being carried out and entering the nozzle 3. Furthermore, by encircling the inner wall of the nozzle 4 with the guide tube 5, the heat transfer effect of the fuel fluid in the guide tube 5 can be effectively improved, ensuring that any small liquid droplets that may exist in the airflow are vaporized.

[0048] Example 2:

[0049] This embodiment provides a flamethrower nozzle, which, in addition to the technical solutions of the above embodiments, also has the following technical features, and further includes:

[0050] The tube body 6 is connected to the gun body 1 at one end and to the nozzle 7 at the other end;

[0051] The separator 8 is installed inside the tube body 6 and is used to divide the tube body 6 into a first chamber 9 and a second chamber 10.

[0052] The first chamber 9 is connected to the inside of the gun body 1 and one end of the guide tube 5, and the second chamber 10 is connected to the nozzle 7 and the other end of the guide tube 5.

[0053] Meanwhile, the tube body 6 is connected to the gun body 1 and the nozzle 7 by threads.

[0054] As can be seen from this embodiment, the tube body 6 is divided into a first chamber 9 and a second chamber 10 by the separator 8, which ensures that all fuel fluid coming out of the fuel tank must pass through the guide pipe 5, thus ensuring the vaporization of any small liquid droplets that may be carried in the fuel fluid.

[0055] Example 3:

[0056] This embodiment provides a flamethrower nozzle, which, in addition to the technical solutions of the above embodiments, also has the following technical features, and further includes:

[0057] A fixing plate 11 is installed on the side of the tube body 6, and both ends of the guide tube 5 are connected to the fixing plate 11 and extend to the first chamber 9 and the second chamber 10 respectively.

[0058] The fixing plate 11 is detachably connected to the partition 8 of the tube body 6, and the partition 8 is a block-shaped partition.

[0059] Meanwhile, the detachable connection is fixed with bolts, while the separator 8 and the tube body 6 adopt an integrated structure.

[0060] As can be seen from this embodiment, fixing the two ends of the guide pipe 5 by fixing the fixing plate 11 improves the installation stability of the two ends of the guide pipe 5 and avoids leakage that could lead to safety hazards.

[0061] Meanwhile, bolt fixing ensures convenient installation and disassembly. The integrated structure between the separator 8 and the tube body 6 ensures sealing and prevents the fuel fluid in the second chamber 10 from entering the first chamber 9 directly without passing through the guide pipe 5. This effectively prevents small liquid droplets that may be carried in the fuel fluid from entering the gun barrel 3 and participating in combustion, thus improving safety.

[0062] Example 4:

[0063] This embodiment provides a flamethrower nozzle, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0064] The guide tube 5 includes an inlet 50 that communicates with the inside of the gun body 1, an outlet 51 that communicates with the gun barrel 3, and an annular part 52 that surrounds the inner wall of the gun head 4.

[0065] Both the inlet section 50 and the outlet section 51 are provided with elbows.

[0066] As can be seen from this embodiment, by setting the guide pipe 5 as an inlet 50, an outlet 51 and an annular part 52, it is convenient for the guide pipe 5 to guide the fuel fluid exported from the fuel tank to the nozzle 4 and to surround the inner wall of the nozzle 4 to ensure heat transfer efficiency. At the same time, it is convenient to install the guide pipe 5 along the nozzle 3, and the elbow further improves the installation adaptability of the guide pipe 5 in the flame gun.

[0067] Example 5:

[0068] This embodiment provides a flamethrower nozzle, which, in addition to the technical solutions of the above embodiments, also has the following technical features, and further includes:

[0069] The fuse 12 is coaxially installed inside the barrel 3 on one side of the head 4, and has multiple protrusions 13 around its circumference that abut against the inner wall of the barrel 3.

[0070] Among them, a gap 14 is formed between two adjacent protrusions 13 to allow the inlet portion 50 and the outlet portion 51 to pass through, and a groove 15 for the annular portion 52 to be inserted is provided at one end of each of the protrusions 13 near the gun head 4.

[0071] Meanwhile, the detonator 12 is press-fitted to the barrel 3 through multiple protrusions 13, and the protrusions 13 and the detonator 12 are integrated into one piece.

[0072] As can be seen from this embodiment, by setting the ignition tube 12, on the one hand, the flame is prevented from directly contacting the guide tube 5, and on the other hand, the gap 14 between two adjacent protrusions 13 facilitates the installation of the guide tube 5, and the grooves 15 on the multiple protrusions 13 for embedding the annular portion 52 improve the installation stability of the guide tube 5.

[0073] Example 6:

[0074] This embodiment provides a flamethrower nozzle, which, in addition to the technical solutions of the above embodiments, also has the following technical features, and further includes:

[0075] Adjustment knob 16 is mounted on gun body 1 and is used to adjust the amount of fuel fluid entering gun body 1 from the gas source;

[0076] An ignition device 17 is installed inside the gun body 1 and is provided with an ignition wire 18 extending into the fuse tube 12;

[0077] The specific structures of the adjustment knob 16 and the electric ignition device are existing technologies, which can be learned by those skilled in the art from traditional flamethrowers, and will not be described in detail here.

[0078] As can be seen from this embodiment, the amount of fuel fluid injected can be easily adjusted by adjusting knob 16, thereby facilitating the control of the flame state, while the electric ignition device can improve the convenience of igniting the mixed gas.

[0079] Furthermore, the end of the electric spark wire 18 located inside the spark tube 12 is installed and limited by a conical spring.

[0080] Example 7:

[0081] This embodiment provides a flamethrower nozzle, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0082] An air inlet 19 is provided on the barrel 3, and an adjusting sleeve 20 is provided for adjusting the opening of the air inlet 19.

[0083] The adjusting sleeve 20 and the surface of the barrel 3 can be connected by threads.

[0084] As can be seen from this embodiment, the amount of air in the mixed combustion gas is ensured by the air inlet 19, thereby ensuring combustion efficiency and flame state. The opening of the air inlet 19 is adjusted by the adjusting sleeve 20, which facilitates the adjustment of the mixing ratio between air and fuel fluid. On the other hand, the structure is simple and the adjustment is convenient, requiring only the rotation of the adjusting sleeve 20.

[0085] Example 8:

[0086] This embodiment provides a flamethrower nozzle, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0087] The fuse tube 12 forms a mixing chamber 21 on the side near the gun body 1, and a gas distribution assembly 22 is provided in the mixing chamber 21;

[0088] The gas distribution assembly 22 includes an outer cylinder 220, an inner cylinder 221, and a connecting plate 222 for connecting the outer cylinder 220 and the inner cylinder 221. A direct flow channel 223 is formed between the outer cylinder 220 and the inner cylinder 221. A central flow channel 224 and a partition plate 225 for dividing the central flow channel 224 into multiple flow channels are formed inside the inner cylinder 221. A guide plate 226 for spirally discharging fuel fluid is provided at one end of the outlet of each of the multiple flow channels.

[0089] Meanwhile, the outer cylinder 220, the inner cylinder 221 and the connecting plate 222 can be welded together, and the partition plate 225...

[0090] As can be seen from this embodiment, the mixing chamber 21 ensures the mixing effect between air and fuel gas, ensuring that the electric ignition device can ignite it. The gas distribution component 22 can further improve the mixing effect, and after the initial ignition, it can ensure the combustion effect of the flame.

[0091] Specifically, a portion of the mixed gas flows to the nozzle 4 through the central flow channel 224, while another portion flows to the nozzle 4 through the direct flow channel 223. The mixed gas in the central flow channel 224 is divided into multiple airflows by the separator 225, and these multiple airflows finally advance in a spiral manner under the action of the guide vane 226. This not only improves the mixing effect of this portion of the mixed gas, but also has a certain centrifugal effect, which causes the surrounding airflow to intrude into and mix with the airflow flowing out of the direct flow channel 223, increasing turbulence and further improving the mixing effect. Furthermore, the airflow in the direct flow channel 223 always flows in a direct direction, which can accelerate the airflow coming out of the central flow channel 224 to a certain extent, reducing the velocity loss caused by the spiral flow in the central flow channel 224, avoiding backfire and improving safety.

[0092] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A flamethrower nozzle, characterized in that, include: The gun body (1) has a connecting part (2) for connecting to the gas source at one end and a gun barrel (3) at the other end, and a gun head (4) is formed at the end of the gun barrel (3) away from the gun body (1). A preheating component is connected to the side of the gun body (1) near the barrel (3); The preheating component includes a guide pipe (5), which is used to guide the fuel fluid entering the gun body (1) to first circulate around the inner wall of the gun head (4) before entering the gun barrel (3).

2. The flamethrower head according to claim 1, characterized in that, Also includes: The tube (6) is connected to the gun body (1) at one end and to the nozzle (7) at the other end. A separator (8) is installed inside the tube body (6) and is used to divide the tube body (6) into a first chamber (9) and a second chamber (10). The first chamber (9) is connected to the inside of the gun body (1) and one end of the guide tube (5), and the second chamber (10) is connected to the nozzle (7) and the other end of the guide tube (5).

3. The flamethrower head according to claim 2, characterized in that, Also includes: A fixing plate (11) is installed on the side of the tube body (6), and both ends of the guide tube (5) are connected to the fixing plate (11) and extend to the first chamber (9) and the second chamber (10) respectively. The fixing plate (11) is detachably connected to the partition (8) of the tube body (6), and the partition (8) is a block partition.

4. The flamethrower head according to claim 1, characterized in that: The guide tube (5) includes an inlet (50) communicating with the inside of the gun body (1), an outlet (51) communicating with the gun barrel (3), and an annular part (52) surrounding the inner wall of the gun head (4).

5. The flamethrower head according to claim 4, characterized in that, Also includes: The fuse (12) is coaxially installed inside the barrel (3) on one side of the head (4), and has multiple protrusions (13) around its circumference that abut against the inner wall of the barrel (3); Among them, a gap (14) is formed between two adjacent protrusions (13) to allow the inlet (50) and outlet (51) to pass through, and a groove (15) for the annular part (52) to be inserted is provided at one end of the multiple protrusions (13) near the gun head (4).

6. The flamethrower head according to claim 5, characterized in that, Also includes: Adjustment knob (16) is mounted on the gun body (1) and is used to adjust the amount of fuel fluid entering the gun body (1) from the gas source; An ignition device (17) is installed inside the gun body (1) and has an ignition wire (18) extending into the fuse tube (12).

7. The flamethrower head according to claim 6, characterized in that: An air inlet (19) is provided on the barrel (3), and an adjustment sleeve (20) for adjusting the opening of the air inlet (19) is provided.

8. The flamethrower head according to claim 7, characterized in that: The fuse tube (12) forms a mixing chamber (21) on the side near the gun body (1), and a gas distribution assembly (22) is provided in the mixing chamber (21). The gas distribution assembly (22) includes an outer cylinder (220), an inner cylinder (221), and a connecting plate (222) for connecting the outer cylinder (220) and the inner cylinder (221). A direct flow channel (223) is formed between the outer cylinder (220) and the inner cylinder (221). A central flow channel (224) is formed inside the inner cylinder (221), and a partition plate (225) for dividing the central flow channel (224) into multiple flow channels is formed. A guide plate (226) for spirally discharging fuel fluid is provided at one end of the outlet of each of the multiple flow channels.

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