Flame gun flame head

Abstract

The present invention provides a flame spray head of a flame spray gun, comprising a head and a nozzle, the nozzle being provided with a rear end and a front end opposite to the rear end, the rear end being plugged into the head and the front end protruding out of the head, the nozzle comprising an intake seat, an inner tube and an outer tube, a first outer channel being provided in the intake seat, a first side channel being provided in the radial direction of the nozzle, the first side channel being connected to the outer periphery of the intake seat and being disconnected from the first outer channel, the inner tube and the outer tube being respectively connected to one end adjacent to the front end of the intake seat, the inner tube being provided with an inner channel, the outer tube being provided with a second outer channel, the second outer channel being connected to the first outer channel, and the inner channel being connected to the first side channel and the second outer channel. The flame spray head can increase the flame temperature and prevent gas explosion caused by gas backflow through the above structure.

Description

Technical Field

[0001] The present invention mainly relates to a flame spray head, in particular to a flame spray head of a flame spray gun. Background Art

[0002] Please refer to Taiwan Patent No. I537528, "Flame Gun Head with Replaceable Barrel," which discloses a flame gun head comprising a body and a barrel. One end of the body comprises a recessed accommodation space along the axial direction of a virtual jet axis. The barrel is selectively detachably coupled to the body along the axial direction of the virtual jet axis. The barrel comprises a tube body and a retaining ring. A receiving seat is provided at one end of the tube body along the axial direction of the virtual jet axis, and a nozzle is provided at the other end opposite to the receiving seat. When the barrel is connected to the body, the receiving seat is located in the accommodation space. The retaining ring is sleeved on the outer periphery of the tube body. A second connecting portion is provided at one end of the retaining ring, and a supporting portion is provided at the other end opposite to the second connecting portion. The second connecting portion is connected to the body, and the supporting portion abuts against a side of the receiving seat opposite to the body.

[0003] However, the torch head of the aforementioned flamethrower is controlled by the main body to open and close the gas. When the gas switch valve is open, gas can enter the barrel from the main body. After the gas switch valve is closed, although the main body no longer outputs gas, gas will still remain in the barrel. The gas mainly burns at the nozzle. However, when the gas switch valve is closed, the gas may flow back or the flame may reignite, causing a gas explosion in the tube or main body. Summary of the Invention

[0004] The object of the present invention is to provide a flame spray head for a flame spray gun which can overcome the disadvantages of the prior art.

[0005] The flame spray head of the flame spray gun of the present invention includes a flame spray head having a head and a nozzle, the nozzle being provided with a rear end and a front end opposite to the rear end, the rear end being plugged into the head and the front end protruding out of the head, the nozzle including a suction seat, an inner tube and an outer tube, a first outer channel being provided in the suction seat from adjacent to the rear end toward adjacent to the front end, the suction seat being provided with a first side channel along the radial direction of the nozzle, the first side channel being connected to the outer peripheral edge of the suction seat and being not connected to the first outer channel, the inner tube and the outer tube being respectively connected to one end of the suction seat adjacent to the front end, and the outer tube being sleeved outside the inner tube, the inner tube being provided with an inner channel, the outer tube being provided with a second outer channel, the second outer channel being connected to the first outer channel, the inner channel being connected to the first side channel, and the inner channel being connected to the second outer channel at one end opposite to the suction seat. The flame spray head can increase the flame temperature and prevent gas backflow from causing gas explosion through the above structure.

[0006] An air mixing seat is provided in the head, the air mixing seat is provided with a fuel channel and an air mixing channel is provided radially along the fuel channel, and the air mixing channel is communicated with the fuel channel.

[0007] The nozzle includes an extension tube connected to one end of the suction seat adjacent to the rear end. A third outer channel is provided in the extension tube. The third outer channel is connected to the first outer channel. The inner circumferential width of the third outer channel along the radial direction of the nozzle is smaller than the inner circumferential width of the first outer channel along the radial direction of the nozzle.

[0008] The nozzle includes a base, which is sleeved on the mixing seat and the extension tube at the same time. A fourth external channel is provided in the base, one end of the fourth external channel is connected to the fuel channel and the other end is connected to the third external channel.

[0009] The nozzle includes a sleeve, one end of which is connected to the base and the other end is connected to an end of the outer tube opposite to the suction seat. The sleeve surrounds the suction seat, the outer tube and the extension tube, and does not contact the suction seat or the extension tube.

[0010] The suction seat is provided with a second side channel along the radial direction of the nozzle. The second side channel is connected to the outer periphery of the suction seat and is not connected to the first outer channel. The inner channel is connected to the second side channel. The first side channel and the second side channel are respectively provided on opposite sides of the inner channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The figure is a three-dimensional appearance diagram of the flame spray head of the flame spray gun of the present invention.

[0012] Figure 2 The figure is a three-dimensional exploded view of the flame spray head of the flame spray gun of the present invention.

[0013] Figure 3 It is a cross-sectional structural diagram of the flame spray head of the flame spray gun of the present invention.

[0014] Figure 4 This is a diagram showing the flame spray head of the flame spray gun of the present invention in use.

[0015] Figure 5 The figure is a cross-sectional structural diagram of the flame spray head of the flame spray gun of the present invention from another perspective.

[0016] Figure 6 This is a diagram of the flame spray head of the flame spray gun of the present invention in use from another perspective.

[0017] Explanation of the accompanying drawings: 10 flame head; 20 head; 21 mixing seat; 211 fuel channel; 212 mixing channel; 30 nozzle; 31 rear end; 32 front end; 33 suction seat; 331 first outer channel; 332 first side channel; 333 second side channel; 34 inner tube; 341 inner channel; 35 outer tube; 351 second outer channel; 36 extension tube; 361 third outer channel; 37 base; 371 fourth outer channel; 38 sleeve. DETAILED DESCRIPTION

[0018] Reference Figures 1 to 6 The figure shows the three-dimensional appearance, three-dimensional exploded view and cross-sectional structure of the flame spray head of the flame spray gun of the present invention. The flame spray head 10 of the present invention includes a head 20 and a nozzle 30; wherein:

[0019] The nozzle 30 is provided with a rear end 31 and a front end 32 opposite to the rear end 31. The rear end 31 is plugged into the head 20 and the front end 32 protrudes out of the head 20. The nozzle 30 includes a suction seat 33, an inner tube 34 and an outer tube 35. A first outer channel 331 is provided in the suction seat 33 from adjacent to the rear end 31 to adjacent to the front end 32. The suction seat 33 is provided with a first side channel 332 along the radial direction of the nozzle 30. The first side channel 332 is connected to the outer periphery of the suction seat 33. The inner tube 34 and the outer tube 35 are respectively connected to one end of the suction seat 33 adjacent to the front end 32, and the outer tube 35 is sleeved on the outside of the inner tube 34. The inner tube 34 is provided with an inner channel 341, and the outer tube 35 is provided with a second outer channel 351. The second outer channel 351 is communicated with the first outer channel 331, and the inner channel 341 is communicated with the first side channel 332. The end of the inner channel 341 opposite to the suction seat 33 is communicated with the second outer channel 351.

[0020] A gas mixing seat 21 is provided in the head 20 . The gas mixing seat 21 is provided with a fuel channel 211 and a gas mixing channel 212 is provided radially along the fuel channel 211 . The gas mixing channel 212 is communicated with the fuel channel 211 .

[0021] The nozzle 30 includes an extension tube 36, which is connected to one end of the suction seat 33 adjacent to the rear end 31. A third outer channel 361 is provided in the extension tube 36. The third outer channel 361 is connected to the first outer channel 331. The inner peripheral width of the third outer channel 361 along the radial direction of the nozzle 30 is smaller than the inner peripheral width of the first outer channel 331 along the radial direction of the nozzle 30.

[0022] The nozzle 30 includes a base 37, which is simultaneously sleeved on the mixing seat 21 and the extension tube 36. A fourth external channel 371 is provided in the base 37. One end of the fourth external channel 371 is connected to the fuel channel 211 and the other end is connected to the third external channel 361.

[0023] The nozzle 30 includes a sleeve 38, one end of which is connected to the base 37 and the other end is connected to the end of the outer tube 35 opposite to the suction seat 33. The sleeve 38 surrounds the suction seat 33, the outer tube 35 and the extension tube 36, and the sleeve 38 does not contact the suction seat 33 or the extension tube 36.

[0024] The suction seat 33 is provided with a second side channel 333 along the radial direction of the nozzle 30. The second side channel 333 is connected to the outer periphery of the suction seat 33 and is not connected to the first outer channel 331. The inner channel 341 is connected to the second side channel 333. The first side channel 332 and the second side channel 333 are respectively provided on opposite sides of the inner channel 341.

[0025] The flame head 10, through the above-described structure, can increase flame temperature and prevent gas backflow and explosion. When the flame head 10 is in use, the fuel channel 211, the first outer channel 331, the second outer channel 351, the third outer channel 361, and the fourth outer channel 371 can allow gas to circulate, and ignite and burn in the second outer channel 351 to produce a flame. The gas mixing channel 212 can draw in air and mix it with the gas to enhance the combustion efficiency of the gas. After the gas is burned and consumed in the second outer channel 351, a negative pressure is generated. The suction force generated by the negative pressure causes air to be drawn in through the first side channel 332 and the second side channel 333 and enter the second outer channel 351 through the inner channel 341. The air drawn in through the first side channel 332 and the second side channel 333 can provide a combustion-supporting effect, further increasing the flame temperature. When the gas switch valve of the head 20 is closed, the gas in the second outer channel 351 will continue to burn and use the first side channel 332 and the second side channel 333 to inhale air. In this state, the inhalation of external air can prevent the gas in the second outer channel 351 from flowing back to the rear end 31 or the flame from burning back to the rear end 31, thereby preventing the occurrence of gas explosion in the flame head 10 after the gas switch valve is closed.

[0026] Based on the above, it can be concluded that the present invention has the following advantages:

[0027] 1. A flame spray head for a flame spray gun according to the present invention, wherein the flame spray head includes a head and a nozzle, the nozzle being provided with a rear end and a front end opposite to the rear end, the rear end being plugged into the head and the front end protruding out of the head, the nozzle including a suction seat, an inner tube and an outer tube, the suction seat being provided with a first outer channel in a direction adjacent to the rear end toward the front end, the suction seat being provided with a first side channel along the radial direction of the nozzle, the first side channel connecting the outer peripheral edge of the suction seat and being disconnected from the first outer channel, the inner tube and the outer tube being respectively connected to one end of the suction seat adjacent to the front end, and the outer tube being sleeved outside the inner tube, the inner tube being provided with an inner channel, the outer tube being provided with a second outer channel, the second outer channel being connected to the first outer channel, the inner channel being connected to the first side channel, and the inner channel being connected to the second outer channel at one end opposite to the suction seat. The flame spray head can increase the flame temperature and prevent gas backflow from causing gas explosion through the above structure.

Claims

1. A flame spray head of a flame spray gun, characterized in that: Includes: a head; A nozzle, which is provided with a rear end and a front end opposite to the rear end, the rear end is inserted into the head and the front end protrudes out of the head, the nozzle includes a suction seat, an inner tube and an outer tube, a first outer channel is provided in the suction seat from adjacent to the rear end to adjacent to the front end, the suction seat is provided with a first side channel along the radial direction of the nozzle, the first side channel is connected to the outer periphery of the suction seat and is not connected with the first outer channel, the first side channel can inhale air, the inner tube and the outer tube are respectively connected to one end of the suction seat adjacent to the front end, and the outer tube is sleeved on the outside of the inner tube, the inner tube is provided with an inner channel, the outer tube is provided with a second outer channel, the second outer channel is connected to the first outer channel, the inner channel is connected to the first side channel, and the inner channel is connected to the second outer channel at one end opposite to the suction seat.

2. The flame spray head of a flame spray gun according to claim 1, wherein: An air mixing seat is provided in the head, the air mixing seat is provided with a fuel channel and an air mixing channel is provided radially along the fuel channel, and the air mixing channel is communicated with the fuel channel.

3. The flame spray head of a flame spray gun according to claim 2, wherein: The nozzle includes an extension tube connected to one end of the suction seat adjacent to the rear end. A third outer channel is provided in the extension tube. The third outer channel is connected to the first outer channel. The inner circumferential width of the third outer channel along the radial direction of the nozzle is smaller than the inner circumferential width of the first outer channel along the radial direction of the nozzle.

4. The flame spray head of a flame spray gun according to claim 3, wherein: The nozzle includes a base, which is sleeved on the mixing seat and the extension tube at the same time. A fourth external channel is provided in the base, one end of the fourth external channel is connected to the fuel channel and the other end is connected to the third external channel.

5. The flame spray head of the flame spray gun according to claim 4, characterized in that: The nozzle includes a sleeve, one end of which is connected to the base and the other end is connected to an end of the outer tube opposite to the suction seat. The sleeve surrounds the suction seat, the outer tube and the extension tube, and does not contact the suction seat or the extension tube.

6. The flame spray head of a flame spray gun according to any one of claims 1 to 5, characterized in that: The suction seat is provided with a second side channel along the radial direction of the nozzle. The second side channel is connected to the outer periphery of the suction seat and is not connected to the first outer channel. The inner channel is connected to the second side channel. The first side channel and the second side channel are respectively provided on opposite sides of the inner channel.

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