JPS593236Y2 - gas combustion control device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gas combustion control device in which a gas flow control device for a main burner and a pilot burner is integrated into a gas cock body.

Conventionally, gas combustion control devices are provided with a piezoelectric ignition device, a raw gas supply prevention device using a thermocouple, etc., and are further provided with fluid flow control in order to operate these devices reliably and completely burn the gas.

However, because the fluid flow control device, gas cock, etc. are formed separately, the piping assembly to connect them is complicated and time-consuming, and they also occupy a large space, making it difficult to downsize. Ta.

Therefore, the present invention aims to provide a gas combustion control device that minimizes the effort of piping assembly and occupies a small space by integrating or forming a fluid flow control device, a gas cock main body, etc., to reduce the overall size. It is something.

Embodiments of the gas combustion control device according to the present invention will be described below with reference to the accompanying drawings.

In Fig. 1, a gas cock body 1, a gas cock 2,
A main burner gas flow control device 3 and a pilot burner gas flow control device 4 are integrated.

However, for convenience of drawing, the pilot burner gas flow control device 4 is shown separately.

Push the dial 5 against the spring 6 and turn it further to the pilot burner ignition position.

By pressing the dial 5, the shaft 7 attached to the dial 5 pushes the top of the spindle 9 against the spring 8, opens the pilot valve 10, and the lower end of the spindle 9 opens the solenoid valve 11 for preventing raw gas supply. The valve body 12 of is pushed down against the spring 13.

Thereby, the gas supplied from the inlet 14 is transferred to the valve chamber 15.
, the pilot burner 1 through the pilot valve 10, the pilot gas passage 16 for ignition, and the pilot gas passage 17.
8 is supplied to pilot burner 1 at the same gas supply pressure.
Purging at 8 is performed immediately.

At the same time, gas is sent to the pilot gas channel 17 via the valve chamber 15 and another pilot channel 19 and also via the gas flow control device 4 for the pilot burner.

Furthermore, rotation of the dial 5 activates the piezoelectric device 20 in a known manner to generate electricity, causing the discharge electrode 21 to generate an electrical discharge and ignite the pilot burner 18 .

A thermocouple 22 disposed close to the pilot burner 18 was heated by the pilot burner flame, and the resulting thermoelectromotive force energized the solenoid valve 11 and pulled the valve body 12 downward against the spring 13. The valve element 12 is maintained in the open state even when the pressure on the dial 5 is released.

Therefore, if the pilot burner is not ignited, by removing the pressing force on the dial 5, the valve body 12
is pushed back upwards by spring 13, closing the valve and closing all gas flow paths.

On the other hand, after the pilot burner is ignited and the solenoid valve 1.1 is held open, when the pressing force on the dial 5 is released, the spindle 9 is returned upward by the force of the spring 8.
Pilot valve 10 closes ignition pilot gas flow path 16 and the only gas flow path to pilot burner 18 is through flow path 19 and gas flow control device 4 .

The gas flow control device for pilot gas is diaphragm 2.
3 and spring 24, the pressure at the outlet 25 and thus the gas supply pressure to the pilot burner is kept constant regardless of fluctuations in the gas pressure in the flow path 19.

That is, if the pressure at the inlet leading to the flow path 19 becomes higher than the combined force of the pressure in the chamber 26 and the spring 24, the diaphragm 23 and the truncated conical valve body 27 fixed thereto are displaced upward. When the gas flow path formed around the valve body 27 becomes narrower and the pressure at the inlet decreases relatively, the valve body 27 is displaced downward and the gas formed around the valve body 27 becomes narrower. The flow path becomes wider, the flow rate of gas flowing through the gas flow path adjusted by the valve body 27 is held constant, and the gas pressure at the outlet 25 is held constant.

Gas at a constant pressure is supplied to the pilot burner 18 by the gas flow control device 4 to obtain a stable flame.

Therefore, fluctuations such as overheating of the thermocouple 22 or underheating do not occur, and the thermocouple 22 supplies a stable thermoelectromotive force to the solenoid valve 11, fully demonstrating the safety function of preventing raw gas supply. At the same time, the life of the thermocouple is extended.

Next, when the dial 5 is further turned to the main burner ignition position, the main hole 29 of the plug valve 28 of the gas cock is aligned with the main flow path 30, and the gas flow path to the main burner 41 passing through the main burner gas flow control device 3 is opened. The main burner 41 is ignited by the burners 1 to 18.

The main burner gas flow control device 3 communicates between the diaphragm 31 and the diaphragm 37 by the combined force of the pressure in a chamber 32 separated by the diaphragm 31 and the spring 33, and the outlet chamber 34 through the inner hole 36 of the valve body 35. It operates according to the relationship between the internal pressure of the chamber 38 defined by

When the pressure in the outlet chamber 34, that is, the chamber 38 becomes relatively high, the diaphragm 31 and therefore the valve body 31 attached to it are pushed upward, and the gas flow path between the valve body 35 and the valve seat 39 becomes narrower. On the other hand, when the pressure in the outlet chamber 34, that is, the chamber 38, becomes relatively low, the diaphragm 31 and the valve body 35 are pushed down, the gas flow path between the valve body 35 and the valve seat 39 is widened, and the valve body The gas flow rate flowing through the gas passage between valve seat 35 and valve seat 39 is kept constant, and the gas pressure in outlet chamber 34 is kept constant.

Since the pressure of the gas supplied to the main burner is kept constant in this way, the flame of the main burner 41 is always maintained at a complete combustion flame.

The gas combustion control device configured as described above is miniaturized as a whole, and further includes electrical connections between the thermocouple and the solenoid valve, between the piezoelectric device and the discharge electrode, as well as the inlet 14, the outlet chamber 34, and the pilot gas flow path. The piping can be easily assembled by simply connecting the fluid passages between 17 and the corresponding gas piping.

FIG. 2 shows an example in which the ignition pilot gas passage 16 is connected to an independent ignition pilot burner 40 without being connected to the pilot gas passage 17, and the pilot valve 10 is connected to an independent pilot burner 40 for ignition.
When the ignition pilot burner 40 is pressed down, gas at the supplied gas pressure is ejected from the ignition pilot burner 40 to perform purging, and is ignited by the ignition electromagnetic discharge to ignite the pilot burner.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an embodiment of the gas combustion control device according to the present invention, and FIG. 2 is a schematic diagram showing a modification of FIG. 1. 1...Gas cock body, 2...Gas cock, 3...Gas flow control device for main burner, 4
・・・・・・Gas flow control device for pilot burner, 5
...Dial, 6...Spring, 7...
...Shaft, 8...Spring, 9...
Spindle, 10...Pilot valve, 11...
... Solenoid valve for preventing raw gas supply, 12 ... Valve body, 13 ... Spring, 14 ... Inlet, 1
5... Valve chamber, 16... Pilot gas flow path for ignition, 17... Pilot gas flow path, 1
8... Pilot burner, 19... Pilot gas flow path, 20... Piezoelectric device, 21...
...Discharge electrode, 22...Thermocouple,
23...Diaphragm, 24...Spring, 25...Exit, 26...Chamber, 27.
... Valve body, 28 ... Plug valve, 29 ...
... Main hole, 30 ... Main channel, 31 ...
...Diaphragm, 32...Chamber, 33...
...Spring, 34...Exit chamber, 35...
Valve body, 36...inner hole, 37...diaphragm, 38...chamber, 39...valve seat,
40... Pilot burner for ignition, 41...
...Main burner.

Claims (1)

[Scope of utility model registration request] A gas cock is formed in a main gas cock body, and the gas cock is integrated into the main gas cock body and connected to the main burner, and the inlet side is connected to the gas cock when the gas cock is in the main burner ignition position. a gas flow control device for a main burner, which is integrally incorporated into the main gas cock body and connected to a pilot burner, and when the gas cock is in a pilot burner ignition position and a main burner ignition position, a pilot burner gas flow control device whose inlet side is connected to the main burner gas flow control device, and the main burner gas flow control device and the pilot burner gas flow control device control gas flow independently from each other. and further configured to be connected to the pilot burner or an ignition pilot burner and formed within the main gas cock body to supply gas at the supply gas pressure when the gas cock is moved to the pilot burner ignition position. 1. A gas combustion control device characterized in that a pilot valve is provided which is configured to open so as to open the gas combustion control device.