JPS6242254Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a nozzle for a gas burner that uses a gas cylinder or the like to form a combustion flame.

[Conventional technology]

Gas burners used for heating synthetic resin pipes usually consist of a gas supply section and a nozzle that injects the gas from the gas supply section.The gas supply section can be either a tank type or a gas cylinder that can be replaced. There is. In both gas burners, a gas amount adjustment mechanism is provided in the nozzle, and the combustion flame is adjusted by operating the gas amount adjustment mechanism.

[Problem that the invention attempts to solve]

However, the conventional gas amount adjustment mechanism ignites the gas injected from the nozzle to form a combustion flame.
The size of the combustion flame is adjusted after the combustion flame is formed, and the combustion flame cannot be adjusted in conjunction with the heating operation.

In general, when heating pipes, etc., the heating and bending of the pipe are repeated alternately, so the gas burner described above is in a state where gas flows out of the gas burner during a temporary pause after the heating work. It was necessary to leave it alone, which caused problems in terms of safety and economy.

To solve this problem, reduce the amount of gas during a temporary pause after heating work, and increase the amount of gas during heating work, but since such operations need to be repeated, this poses a problem in work efficiency. Occasionally, the gas combustion flame may go out and require relighting.

Therefore, the technical objective of this invention is to solve the above problems and reduce the waste of gas.

[Means for solving problems]

In order to solve the above problems, this invention provides a gas outlet in the nozzle body, a pin insertion hole that communicates with the gas outlet, and a gas flow passage that communicates with the tip of the pin insertion hole. The main pin for adjusting the gas outlet opening, which is inserted into the insertion hole and whose position can be adjusted in the axial direction, has a guide hole on the axis, an orifice at the tip of the guide hole, and an orifice on the outer peripheral surface of the tip. A radial through hole is formed, a sub-adjustment pin for adjusting the opening of the orifice is slidably inserted into the guide hole, and a spring is provided for pressing the sub-adjustment pin toward the orifice. The structure includes an operating mechanism that moves the sub-adjustment pin in the axial direction against the elastic force of the sub-adjustment pin.

[Effect]

In the nozzle configured as described above, by moving the main pin in the axial direction to move the tip part away from the gas outlet, the gas supplied to the gas flow passage flows from the tip part of the pin insertion hole to the gas outlet.
Therefore, by adjusting the amount of movement of the main pin in the axial direction to reduce the amount of gas injected from the gas outlet, and igniting the gas, a pilot flame can be formed.

In addition, when the pilot flame is formed, the sub-adjustment pin is moved back against the elasticity of the spring to separate the tip from the orifice, so that the main gas flows from the gas flow path to the tip of the pin insertion hole. It flows from the pin through hole to the inner guide hole and from there through the orifice to the gas outlet. Therefore, the amount of gas flowing out from the gas outlet increases, and a combustion flame of a predetermined size can be formed.

Therefore, by operating the operating mechanism and retracting the sub-adjustment pin during heating work,
Heating can be performed using the combustion flame formed at the tip of the gas outlet, and after the heating is completed, the operation mechanism is released and the sub-adjustment pin is moved in the axial direction by the elasticity of the spring. By fully closing the orifice, a pilot flame remains, reducing gas waste.

〔Example〕

As shown in the figure, there is a gas cylinder A on the top surface of the pedestal 1.
A recess 2 is formed into which the bottom of the recess 2 can fit. A guide shaft 3 is provided on the outer periphery of the upper surface of the pedestal 2, and a lower portion of a cylinder 4 is slidably fitted on the outside of the guide shaft 3. This cylindrical body 4 is pulled downward by a spring (not shown) provided inside the cylindrical body 4.

A tip 5 for cylinder positioning is attached to the middle of the cylinder 4, and a bent portion 6 extending above the pedestal 2 is formed above the attachment point of the tip 5, and a nozzle disposed above the bent portion 6. Main body 7
is attached to the bent part 6 by tightening a nut 8 provided at the lower part of the bent part 6.

The gas cylinder A is housed between the pedestal 1 and the bent part 6, and is clamped between the pedestal 1 and the bent part 6 by the elasticity of the spring that pushes down the cylinder 4. By attaching the cylinder A in this manner, the valve of the cylinder A is opened, and the gas inside flows into the gas flow passage 9 formed in the nozzle body 7.

A cylindrical portion 10 is formed at the tip of the nozzle body 7, and an end portion of a combustion tube 11 is fitted onto the outside of the cylindrical portion 10. Reference numeral 12 indicates a secondary air hole formed in the combustion tube 11.

The nozzle body 7 also has a pin insertion hole 13 extending from the rear end toward the center of the end surface of the cylindrical portion 10 , and a gas outlet 14 that communicates with the tip of the pin insertion hole 13 and opens at the end surface of the cylindrical portion 9 . , and the gas flow passage 9 communicates with the tip of the pin insertion hole 13 .

A part of the gas flow passage 9 faces the inside of the cylindrical part 10, and the gas changes its flow in the opposite direction inside the cylindrical part 10, and then flows into the tip of the pin insertion hole 13. There is.

A main pin 15 is provided inside the pin insertion hole 13.
is inserted, the male thread 16 formed on the outer peripheral surface of the tip of the main pin 15 threadably engages with the female thread 17 formed on the inner peripheral surface of the pin insertion hole 13, and the main pin 15 is threaded outward from the rear end of the pin insertion hole 13. A handle 18 is attached to the protruding rear end, and by rotating the handle 18, the main pin 15 is moved in the axial direction.

In addition, a tightening nut 1 is installed in the middle of the main pin 15.
9 are fitted together, and the tightening nut 19 engages with the male thread 20 formed on the outer circumferential surface of the rear end of the nozzle body 7, and by tightening the tightening nut 19, the main pin 15 is moved to the axial adjustment position. Can be locked.

The tip of this main pin 15 is located in the pin insertion hole 13.
A gap 21 is provided between the pin insertion hole 13 and the pin insertion hole 13 .

The main pin 15 has a guide hole 22 on its axial center line and a guide hole 23 at its tip.
2 and a radial through hole 24 is formed in the outer circumferential surface of the tip.

Furthermore, a threaded cylindrical portion 2 is provided at the rear end of the main pin 15.
5 is provided, and an adjustment nut 2 is attached to the threaded cylindrical portion 25.
6 is screwed in.

A sub-adjustment pin 27 with a tapered tip is inserted into the guide hole 22, and when the operating mechanism 30 is operated, the sub-adjustment pin 27 is moved backward so that the tip part is separated from the orifice 23, and the tip of the sub-adjustment pin 27 is removed from the orifice 23. A spring 28 fitted onto a sub-adjustment pin 27 inside the cylindrical portion 25 moves it forward to close the orifice 23.

The operating mechanism 30 has a support member 31 attached to the bent portion 6 of the cylinder 4, and a lever 3 attached to the support member 31.
2 is rotatably supported, and a bifurcated piece 33 provided at the upper end of the lever 32 is fitted into the rear end of the sub-adjustment pin 27 that protrudes toward the rear side of the adjustment nut 26, thereby adjusting the sub-adjustment. A bifurcated piece 33 is engaged with a large diameter portion 34 at the rear end of the pin 27.

Note that 29 indicates a seal that seals the rear end portions of the pin insertion hole 13 and the guide hole 22.

Now, the gas cylinder A is placed between the pedestal 1 and the bent part 6.
is set, rotate the handle 18 and move the main pin 15 in the axial direction to move the tip of the main pin 15 away from the gas outlet 14, so that the gas flowing from the cylinder A into the gas flow passage 9 is Gas flows to the gas outlet 14 through a gap 21 formed around the outer circumference of the tip of the pin 15 .

Therefore, by igniting the gas ejected from the gas outlet 14, a combustion flame can be formed.
The size of this combustion flame can be adjusted by moving the main pin 15 in the axial direction, and by making the combustion flame smaller, it can be used as a pilot flame.

After the pilot flame is formed, when the lower end of the lever 32 is pushed toward the bent part 6, the sub-adjustment pin 27 retreats against the elasticity of the spring 28, and the tip part separates from the orifice 23. opens. Therefore, the gas flowing into the gap 21 flows from the through hole 24 to the inside of the sub-adjustment pin 27 and then passes through the orifice 23 to the gas outlet 14, so the amount of gas flowing out increases, and the gas flows toward the front side of the gas outlet 14. can form a large combustion flame.

When heating the object to be heated, the heating operation is performed with the rear end of the lever 32 pressed, and after the heating operation is completed, the pressing of the lever 32 is released, and the elasticity of the spring 28 causes the sub-adjustment pin to move. Move 27 forward and orifice 2
3 is closed to prevent gas from flowing out from the orifice 23. As a result, only the pilot flame remains when the heating operation is temporarily stopped, which prevents wastage of gas.

Note that after the heating operation is completed, the main pin 15 is moved in the axial direction by rotating the handle 18 so that the gas outlet 14 is closed at the tip thereof.

As in the embodiment, by locating a part of the gas flow path 9 in front of the gas outlet 14, the gas can be preheated by the pilot flame and combustion flame formed at the gas outlet 14, so that the combustion This can be effective in improving efficiency.

Further, in the case of the embodiment, the operating mechanism 30 is shown in which the sub-adjustment pin 27 is moved in the axial direction by rotating the lever 32, but the operating mechanism 30 is not limited to this. .

〔effect〕

As described above, according to this invention, the sub-adjustment pin is inserted inside the main pin for opening and closing the gas outlet, and the sub-adjustment pin is moved backward in the axial direction by the operating mechanism, thereby opening and closing the gas outlet. The amount of gas flowing to the gas outlet increases, and by releasing the above operating mechanism and moving the sub-adjustment pin forward by the elasticity of the spring, the amount of gas flowing to the gas outlet decreases. Only the pilot flame can be left, which is economical as there is less gas wasted.

[Brief explanation of the drawing]

FIG. 1 is a side view of a gas burner using the nozzle according to the invention, FIG. 2 is an enlarged sectional view of the same nozzle, and FIG. 3 is an exploded perspective view of the same gas burner. 7... Nozzle body, 9... Gas flow path, 13...
... Pin insertion hole, 14 ... Gas outlet, 15 ... Main pin, 21 ... Gap, 22 ... Guide hole, 23
... Orifice, 24 ... Through hole, 27 ... Sub-adjustment pin, 28 ... Spring, 30 ...
Operation mechanism.

Claims (1)

[Scope of utility model registration request] A gas outlet, a pin insertion hole communicating with the gas outlet, and a gas flow passage communicating with the tip of the pin insertion hole are formed in the nozzle body, and the pin insertion hole has a gas outlet for adjusting the opening of the gas outlet. A main pin is provided so that its position can be adjusted in the axial direction, a gap is formed between the tip of the main pin and the pin insertion hole, and the main pin has a guide hole on the axis line and a guide hole at the tip of the guide hole. An orifice and a radial through hole are formed on the outer peripheral surface of the tip, and a sub-adjustment pin for adjusting the opening of the orifice is slidably inserted into the guide hole, and the sub-adjustment pin is directed toward the orifice. A gas burner nozzle that is equipped with a spring that presses the sub-adjustment pin, and an operation mechanism that moves the sub-adjustment pin in the axial direction against the elasticity of the spring.