JPH0120529Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a safety device for a combustor.

Conventionally, as safety devices for oil pools in liquid fuel combustors, there have been methods for detecting oil pools by installing a float switch, and methods for forcibly evaporating the collected liquid fuel. However, the former type is difficult to miniaturize, and the latter type increases running costs and affects combustibility.

The present invention eliminates the above-mentioned conventional drawbacks, and will be described below with reference to the illustrated embodiments. Figure 1 shows an embodiment of the present invention, where 1 is a blower tube, 2 is a blower tube, and 2 is a blower tube.
is a burner case communicating with the blower tube 1. 3 is a burner, a spray nozzle 4, an ignition electrode 5,
It is formed of a vaporizing cylinder 6 and an inner cylinder having a secondary air port 7. Reference numeral 8 denotes a pressure detection port provided at the bottom of the burner case 2, which is connected to a wind pressure switch 9 placed at a higher position than the pressure detection port 8 through a pressure detection tube 10.
11 is a small hole provided in the pressure detection tube 10, and is provided at a position higher than the pressure detection port 8. Reference numeral 12 denotes a switch that is closed when the wind pressure switch 9 detects positive pressure and issues a combustion command.

The operation of this configuration will be explained. During normal operation, when air is blown from blower tube 1, burner case 2
There is a positive pressure inside, and the wind pressure switch 9 detects this, closes the switch 12, and operates the burner 3. When liquid fuel accumulates in the burner case 2 due to poor vaporization or malfunction of the spray nozzle 4, it flows into the pressure detection port 8 at the bottom, accumulates in the pressure detection tube 10, and becomes blocked. Then, the pressure inside the pressure detection tube 10 is reduced to the small hole 11.
It becomes atmospheric pressure. Then, the wind pressure switch is operated to open the switch 12 and stop the operation of the burner 3.

Figures 2 and 3 show other embodiments,
The one in Figure 2 is a wire mesh 13 with an appropriate roughness for the pressure detection port 8.
The surface tension of the liquid fuel accumulated in the burner case 2 closes the pressure detection port 8 and cuts off the pressure. The one in Figure 3 is pressure tube 1.
A float 14 is provided inside the small hole 11, and the small hole 11 is opened and closed by a stopper 15 that interlocks with the float 14.

As described above, the present invention provides a pressure detection port at the bottom of the burner case that communicates with the blower tube, connects the pressure detection port to the wind pressure switch with a pressure tube, and makes a small hole in the pressure tube at a position higher than the pressure detection port. This feature allows combustion to be stopped in the event that liquid fuel or rainwater accumulates inside the burner case, ensuring safety.In addition, it also doubles as a wind pressure switch to check fan operation, reducing the number of parts. It can be done at low cost without any increase. The present invention can be applied not only to liquid fuel detection but also to water detection.

In addition, in the embodiment shown in Figure 2, by providing a wire mesh over the pressure detection port, it is possible to block the pressure detection port with a small amount of water or liquid fuel, and in the event of an abnormality, combustion can be stopped as quickly as an elbow. It is something. Furthermore, in the embodiment shown in FIG. 3, the float and stopper allow the pressure test tube to be opened and closed reliably, and the small hole can be enlarged to eliminate the fear of clogging.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an embodiment of the present invention;
FIG. 3 shows a sectional view of a main part of another embodiment of the present invention. 1... blow tube, 2... burner case,
8... Pressure test port, 9... Wind pressure switch, 10... Pressure test tube, 11... Small hole.

Claims (1)

[Scope of utility model registration request] A pressure detection port is provided at the lowest part of the burner case that communicates with the blower tube, the pressure detection port is connected to the wind pressure switch with a pressure test tube, and a small hole is provided in the pressure test tube at a position higher than the pressure test port. safety equipment.