JPH0212452Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention is a structure for mounting a thermocouple on a gas burner, and more specifically, a thermocouple is installed near the flame opening of the burner body, and the thermocouple is connected during ignition and extinguishment. This invention relates to a structure for attaching a thermocouple to a gas burner in which the ignition state is detected based on a change in the electromotive force of the gas burner.

[Background Art] Generally, gas burners are made of cast metal and are prone to rust. Therefore, in this type of gas burner in which a thermocouple is disposed near the flame opening of the burner body, a thermocouple formed on the burner body is The inner peripheral surface of the mounting hole for holding the thermocouple becomes rusted and sticks to the thermocouple, which may prevent the thermocouple from being removed when the thermocouple is replaced.

[Purpose of the invention] The present invention has been made in view of the above-mentioned points, and its main purpose is to provide a gas burner in which a thermocouple is held in a burner body formed by casting. To provide a structure for attaching a thermocouple to a gas burner, which allows the thermocouple to be easily replaced even if the burner body rusts.

[Disclosure of the invention] In the invention, a spacer made of a corrosion-resistant material is interposed between the thermocouple and the inner peripheral surface of the mounting hole for holding the thermocouple formed in the burner body. , discloses a structure that allows a thermocouple to be easily attached and detached even if the burner body is rusted.

Hereinafter, embodiments of the present invention will be described based on the drawings. As shown in the figure, the burner body 3 is formed in a cylindrical shape and is provided at the other end of a mixing tube 11 having a gas introduction nozzle 10 at one end in the axial direction. The mixing tube 11 is made of cast metal. The burner body 3 is formed into a ring shape having an axis in the vertical direction and a cavity 12 inside, and a plurality of flame ports 1 are opened on the circumferential surface thereof. A pair of mounting pieces 13 for holding the thermocouple 2 are protruded from the outer periphery of the base of the burner body 3, and each of the mounting pieces 13 is formed with a mounting hole 4 that extends vertically through the burner body 3 on the same straight line. A thermocouple 2 having a substantially cylindrical shape with a tapered tip is inserted into the mounting hole 4 , and a temperature detecting section 14 provided at the tip of the thermocouple 2 is arranged near the flame port 1 . That is, when the burner main body 3 is in the ignited state, the electromotive force of the thermocouple 2 is larger than when it is in the extinguished state, so the ignition state can be detected by using changes in this electromotive force. It is. A spacer 5 made of a corrosion-resistant material such as stainless steel or ceramic is provided on the inner circumferential surface of the mounting hole 4 into which the thermocouple 2 is inserted. This spacer 5 is sandwiched between the pair 2. Therefore, although the burner body 3 is a cast metal and is prone to rust, the spacer 5 in contact with the thermocouple 2
is not corroded, thereby preventing the burner body 3 and the thermocouple 2 from sticking together, and making it possible to easily replace the thermocouple 2.

By the way, gas is introduced into the burner body 3 through the nozzle 10, and the gas is introduced into the nozzle 10 through an introduction pipe 20, a solenoid valve 21, and a plug valve 23 equipped with a closure 22. It will be destroyed.
That is, the introduction pipe 20, the electromagnetic valve 21, and the stopper valve 23
and the nozzle 10 are connected in series, and when either the solenoid valve 21 or the stopper valve 23 is closed, the supply of gas to the burner body 3 is stopped. The solenoid valve 21 is connected to the connecting wire 19
The solenoid valve 21 is connected to the thermocouple 2 through the thermocouple 2 and responds to the electromotive force of the thermocouple 2. When the gas discharged from the flame port 1 is ignited, the solenoid valve 21 is opened, and when the flame is extinguished, the solenoid valve 21 is opened. is closed and the introduction of gas into the burner body 3 is stopped. On the other hand, the plug body valve 2
3 has a closure 22 disposed within a cylindrical main body 28, and the closure 22 is fixed to the other end of a shaft 25 having a knob 24 attached to one end.
It rotates as the rotary shaft 25 rotates. closed child 2
2 is approximately cylindrical, and has an inlet 26 on one bottom surface.
is opened, and the outlet port 27 is opened on the side surface, and the inlet port 26 and the outlet port 27 communicate with each other inside the closure 22. The main body portion 28 is formed in such a shape that its inner circumferential surface is in close contact with the outer circumferential surface of the closure 22 , and has a communication port 29 corresponding to the introduction port 26 of the closure 22 .
is formed on the bottom surface, and a communication port 30 corresponding to the outlet 27 of the closure 22 is formed on the side surface. Therefore, the introduction port 26 of the closure 22 and the communication port 29 communicate with each other regardless of the rotation of the closure 22, and when the closure 22 rotates with the rotation of the shaft 25, the closure is not fed. Communication port 30 between outlet 27 and main body 28
It moves between a position where the two match and a position where they deviate from each other. As a result, when the outlet 27 of the closure 22 matches the communication port 30 of the main body 28, the plug valve 23 is opened, and the outlet 27 of the closure 22 is in a position misaligned with the communication port 30 of the main body 28. When located, the stopper valve 23 is closed and the supply of gas to the burner body 3 is stopped. As described above, by turning the Kotoku shaft 25, it is possible to switch between the state in which gas is supplied to the burner body 3 and the state in which the gas supply is stopped, and the gas is supplied to the burner body 3. Even when the burner body 3 is running, if the gas discharged from the flame port 1 of the burner body 3 is extinguished due to an unexpected accident, the supply of gas to the burner body 3 is stopped by the action of the thermocouple 2 and the solenoid valve 21. This prevents the danger of gas being discharged from the flame port 1 when the fire is extinguished. When igniting, the solenoid valve 21 and plug valve 2 are opened from the extinguished state.
3 and 3 at the same time, the pressing shaft 31 is pressed so that the valve body of the solenoid valve 21 can be pushed in the direction in which the solenoid valve 21 opens by pushing the Kotuku shaft 25 in the axial direction at the time of ignition. is closing child 22
It is inserted inside.

[Effects of the invention] As described above, in the present invention, a mounting hole for holding a thermocouple is formed in the burner body, and a corrosion-resistant material is formed between the inner peripheral surface of the mounting hole and the thermocouple. Since the spacer is inserted between the inner peripheral surface of the mounting hole and the thermocouple, even if the burner body rusts in a gas burner where the thermocouple is held in the burner body formed by casting, The spacer prevents the thermocouple from sticking to the burner body,
This has the advantage that the thermocouple can be easily replaced.

[Brief explanation of the drawing]

The figure is a longitudinal sectional view showing an embodiment of the present invention. 1 is a flame port, 2 is a thermocouple, 3 is a burner body, 4 is a mounting hole, and 5 is a spacer.

Claims (1)

[Scope of utility model registration request] This is a gas burner in which a thermocouple is installed near the flame opening of the burner body, and the ignition state is detected by the change in electromotive force of the thermocouple between ignition and extinguishing. Installation of a thermocouple to a gas burner, characterized in that a mounting hole for holding the pair is formed, and a spacer made of a corrosion-resistant material is interposed between the inner peripheral surface of the mounting hole and the thermocouple. structure.