JPH0241467Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> The present invention relates to an extinguishing safety device for a gas lantern in which a burner section is disposed above a gas storage section.

<<Prior Art>> Conventionally, in gas appliances, devices using thermocouples and electromagnets have often been used as safety devices for stopping the gas supply when the burner goes out due to outside wind or the like.

However, with this type of thermocouple and electromagnet, it takes a long time to stop the gas supply after a power out occurs, and the electromagnet must be of high precision, making it expensive. There's a problem.

Therefore, in recent years, a safety device has been proposed in which a shape memory alloy is placed in a position that is directly heated by flame, and the deformation force of the shape memory alloy is transmitted to the valve element of the safety valve.

《Problem to be solved》 However, even in a safety device that uses a shape memory alloy, the shape memory alloy, which is the heat receiving part, and the safety valve valve, which is the operating part, are connected by a connecting material such as a wire. Because of this, there was a problem of low operating accuracy due to the effects of frictional resistance in the transmission system.

Furthermore, there are no portable gas appliances such as gas lanterns used outdoors that have built-in safety devices.

<Means for solving the problem> The present invention provides a gas extinguishment safety device with high operating accuracy that can be used in portable gas appliances.
To this end, a nozzle pipe is arranged in the burner body of the burner section located above the fuel gas storage part so that it can be raised and lowered, and a valve element is installed at the lower end of this nozzle pipe, and a valve seat is installed at the bottom of the nozzle installation hole. At the same time, a safety valve is constructed by pressing the nozzle pipe downward with a valve closing spring, and a temperature-sensitive actuator made of bimetal or shape memory alloy is installed at the upper end of the nozzle pipe to adjust the operating force when receiving heat. is arranged to oppose the spring force of the valve-closing spring, and the operating force of the temperature-sensitive actuator when receiving heat is made larger than the valve-closing biasing force of the valve-closing spring.

<<Operation>> In the present invention, a nozzle pipe is arranged in the burner body of the burner section arranged above the fuel gas storage part so as to be able to rise and fall, and a valve is attached to the lower end of the nozzle pipe, and the bottom surface of the nozzle installation hole A safety valve is constructed by forming a valve seat on each side and pressing the nozzle pipe downward with a valve-closing spring, and a temperature-sensitive actuator made of bimetal or shape memory alloy is installed at the upper end of the nozzle pipe. The operating force is arranged to oppose the spring force of the valve-closing spring, and the operating force when the temperature-sensitive actuator receives heat is made larger than the valve-closing force of the valve-closing spring. Since combustion heat is conducted to the temperature-sensitive actuator through the nozzle pipe, the safety valve remains open and combustion continues, but when the flame is blown out by the influence of the wind and goes out, the temperature-sensitive actuator As the safety valve cools, the operating force that urges the nozzle pipe upward disappears, and the spring force of the valve-closing spring forces the nozzle pipe downward to close the safety valve. As a result, when the nozzle is turned off, the gas supply to the nozzle pipe is stopped, so that no raw gas flows out.

<<Example>> FIG. 1 is a partially cut away center vertical sectional view of a gas lantern, and FIG. 2 is an external perspective view.

This gas lantern is constructed by fixing a burner part 3 to the upper wall 2 of a fuel gas storage part 1 in a state where it can rotate within a certain range, and the fuel gas storage part 1 and burner part 3 are connected to each other. A manual valve 4 composed of a needle valve is formed in the section.

This manual valve 4 includes a needle valve 5 that is supported within the upper wall 2 of the fuel gas storage section 1 so as to be able to move up and down.
and a valve seat surface 9 formed by the circumferential surface of the gas passage 8 provided through the bottom wall 7 of the burner body 6 of the burner section 3.
The valve is opened and closed by the needle valve element 5 coming into contact with and separating from the valve seat surface 9 as the burner main body 6 moves up and down relative to the rotation thereof.

A nozzle pipe 10 is fitted into the burner body 6, and the gas passage 8 is opened at the bottom of the nozzle pipe installation hole 11. The nozzle pipe 10 is installed in a nozzle installation hole 11 so as to be movable up and down, and is urged downward by a spring 12. Further, an opening 13 of the gas passage 8 is provided on the lower end surface of the nozzle pipe 10.
A sealing material 14 is fitted to contact from above,
A safety valve 16 is constructed, with the periphery of the opening at the bottom of the nozzle installation hole 11 serving as a valve seat 15, and the sealing material 14 serving as a valve element. Note that reference numeral 17 is a communication hole that communicates with the inside of the nozzle pipe 10 and the inside of the nozzle installation hole 11, and 18 is a flame port formed at the upper end opening of the nozzle pipe 10.

A bimetallic temperature-sensitive actuator 19 is disposed between the upper end of the nozzle pipe 10 and the upper end surface of the burner body 6. This temperature-sensitive operating tool 19 is formed to increase its thickness when receiving heat, and its operating force is set to be greater than the spring force of the spring 12 that urges the nozzle tube 10 downward.

In the figure, reference numeral 20 indicates a decorative cover that covers the burner section 3, 21 indicates an operating tool for rotating the burner body 6, and 22 indicates a gas filling port provided on the bottom wall of the fuel gas storage section 1.

In the above-described gas lantern, even if the manual valve 4 is opened at the time of ignition, gas is not supplied to the nozzle pipe 6 because the temperature-sensitive actuator 19 is in a low temperature state. Therefore, when igniting, the temperature-sensitive actuator 1
By preheating the nozzle pipe 9 and raising the nozzle pipe 6 against the spring force of the urging spring 12, the safety valve 16 opens and gas flows into the nozzle pipe 6 and burns at the flame port 18. After ignition, the combustion heat accompanying combustion at the flame port 16 is transmitted to the temperature-sensitive actuator 19 via the nozzle pipe 6, so the safety valve 16 is maintained in the open state.

When the flame is blown out by the influence of the wind, no heat is transferred from the flame port 18 to the temperature-sensitive actuator 19, so the temperature-sensitive actuator 19 reduces its operating force and acts on the nozzle pipe 10. The spring force of the valve-closing spring 12 moves the nozzle pipe 10 downward, and the safety valve 16 is completely closed. This prevents raw gas from flowing out even when the manual valve 4 is open.

In the above embodiment, the temperature-sensitive actuator is made of bimetal, but it may be made of a shape memory alloy, or may be made of a thermally deformable material such as thermowax.

<<Effects>> In the present invention, a nozzle pipe is disposed in the burner body of the burner unit disposed above the fuel gas storage part so as to be movable up and down, and a valve is attached to the lower end of the nozzle pipe to the bottom of the nozzle installation hole. A safety valve is constructed by forming a valve seat on each side and pressing the nozzle pipe downward with a valve-closing spring, and a temperature-sensitive actuator made of bimetal or shape memory alloy is installed at the upper end of the nozzle pipe. The operating force is arranged to oppose the spring force of the valve-closing spring, and the operating force when the temperature-sensitive actuator receives heat is made larger than the valve-closing force of the valve-closing spring. Combustion heat is conducted to the temperature-sensitive actuator through the nozzle pipe, and the safety valve remains open and combustion continues, but when the flame is blown out by the influence of the wind and goes out, the temperature-sensitive actuator cools down. The operating force decreases, and the spring force of the valve closing spring forces the nozzle pipe downward to close the safety valve.
This makes it possible to stop the gas supply to the nozzle pipe and prevent raw gas from flowing out when the nozzle is turned off.

Furthermore, since the nozzle pipe constitutes a part of the safety valve, its structure is simple and it can be easily applied to portable gas combustion appliances such as gas lanterns.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially cut away central longitudinal sectional view of a gas lantern, and FIG. 2 is an external perspective view. 1... Fuel gas storage section, 3... Burner section, 4
... Manual valve, 6 ... Burner body, 10 ... Nozzle pipe, 11 ... Nozzle assembly hole, 12 ... Valve closing spring, 14 ... Valve element, 15 ... Valve seat, 16 ... Safety valve, 18 ... ...flame mouth, 19...temperature-sensitive actuator.

Claims (1)

[Claims for Utility Model Registration] 1. A nozzle pipe in which a burner part 3 is disposed above a fuel gas storage part 1 via a manual valve 4, and an upper end opening is formed as a flame port 18 in a burner body 6 of the burner part 3. A valve seat 15 is formed on the bottom of the nozzle installation hole 11 of the burner body 6, and a valve 1 is attached to the lower end of the nozzle pipe 10.
A safety valve 16 is constructed by forming a nozzle pipe 10 and pressing the valve element 14 toward the valve seat 15 side with a valve closing spring 12, and connecting the upper end of the nozzle pipe 10 and the upper end surface of the burner main body 6. Temperature-sensitive actuator 1 between
9 is arranged in such a way that the operating force when receiving heat acts upwardly, and the operating force of this temperature-sensitive actuator 19 when receiving heat is made larger than the valve closing biasing force of the valve closing spring 12. Safety device for gas lanterns. 2. The gas lantern extinguishing safety device described in claim 1, wherein the temperature-sensitive actuator 19 is made of bimetal. 3. The gas lantern extinguishing safety device according to claim 1, wherein the temperature-sensitive actuator 19 is made of a shape memory alloy.