JPS6016856Y2 - Combustion safety device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combustion safety device mainly applied to gas burners.

Conventionally, in this type of device, a cylindrical oxygen concentration cell element having electrodes on both the inner and outer surfaces is interposed in a conduit that guides combustion exhaust gas from a burner through an air collection port at one end facing the burner. A system has been proposed in which the operation of the safety valve is controlled by the output of Therefore, there is a problem that the operation of the element is not constant.

The purpose of the present invention is to obtain a device that does not have the above disadvantages. A cylindrical oxygen concentration battery element 5 having electrodes 4, 4 is interposed, and the output of the element 5 controls the operation of a safety valve interposed in the gas supply path. It can be freely adjusted to move forward and backward toward the burner 1.

The element 5 is made of, for example, a zirconia element, and in the illustrated example, one electrode 4 is connected to the normally-fired pilot burner 3.
It was made to be constantly heated with a flame.

The air intake port 2 is, for example, shaped like a hat as shown in the figure.
Examples of vertically movable means include inner and outer double pipes 3a, 3 in which parts of the conduit 3 are slidably fitted into each other as shown in the figure.
A, and in order to fix it in an appropriate position, for example, as shown in FIGS. 2 and 3, a multi-stage pin groove 7 is provided on one side, and a pin 8 is provided on the other side, and the pin 8 is inserted in an appropriate position. It can be fixed freely with screws 9 at the position shown in FIG.

In the drawings, 10 indicates a primary air hole, and 11 indicates a pilot nozzle.

To explain its operation, the flame of burner 1 is always in the intermediate state of normal flame A, but depending on the type of gas, it changes to a downward back flame or an upward lift flame C. In the case of back gas, the port 2 is adjusted appropriately to the position of the green stone shown in FIG. The amount of can be kept substantially constant at all times, and the detection operation of the element 5 can be made stable.

As described above, according to the present invention, the air intake port 2 facing the burner 1 can be freely adjusted forward and backward, regardless of the type of gas.

This has the effect of keeping the amount of exhaust gas introduced into the conduit 3 constant at all times to ensure stable and reliable operation of the oxygen concentration battery element 5.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway side view of one example of the proposed device;
The figure is an enlarged cross-sectional side view of a part of it, and Figure 3 is its ■-
■Draw a cross-sectional view of the cut line surface. 1... Burner, 2... Air intake, 3...
... Conduit, 4.4 ... Electrode, 5 ...
・Oxygen concentration battery element.

Claims (1)

[Scope of utility model registration request] 1 to a conduit 3 that guides combustion exhaust gas from a burner 1 through an air intake port 2 at one end facing the burner 1, and electrodes 4 on both inner and outer surfaces.
, 4 with a cylindrical oxygen concentration battery element 5 interposed therebetween,
A combustion safety device in which the operation of a safety valve interposed in a gas supply path is controlled by the output of the element 5, and the air intake port 2 can be freely adjusted to advance or retreat toward the burner 1.