JPS59202322A - Safety device of liquid burner - Google Patents

Abstract

PURPOSE:To improve the safety of a liquid burner by causing a member made up from a configuration memory alloy to act on a seismoscope at the time of an abnormally high temperature to extinguish fire. CONSTITUTION:When the temperature in the vicinity of a pendulum base 42 of a fuel tank 14 is below the transformation point of a coil 44, the coil 44 contracts. When the temperature in the vicinity of the pendulum base 42 rises up and exceeds the transformation point, the coil 44 expands. Accordingly, an operation equivalent to that when the pendulum 41 slips off from the pendulum base 42 and falls down, is carried out, and the seismoscope 50 operates. Thus, a wick 1 is accommodated in an opening 5 and a fire extinguishment is performed. Hence, the safety of the burner is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a safety device for liquid-burning appliances, such as, for example, oil portable stoves. [Background Art] In petroleum portable stoves, backfire or wind during combustion can cause flames to occur not only at the top of the wick but also at the bottom, creating a dangerous situation.

Conventional kerosene portable stoves are not configured to automatically extinguish the fire when such a dangerous situation occurs, and there is a risk of a fire occurring.

OBJECT It is an object of the present invention to provide a safety device for liquid combustion equipment that improves safety.

Embodiment FIG. 1 is a sectional view of a portion of an embodiment of the present invention. The upper part of the core 1 made of cylindrical cloth or the like protrudes upward from the opening 5 of the main body 4 consisting of the inner iiζ 12 and the outer cylinder 3, and can be stored inward from the opening 5.

FIG. 2 is a cross-sectional view 1-1 showing the structure related to the core 1. A core top 6 is provided at the top of the inner cylinder 2. The opening 5 is formed over the entire circumference, and a burner assembly 7 (see FIG. 1) is arranged above the opening 5.

A core holder 8 is wound around the middle one return portion of the core 1. At part 1111 of the lead holder 8, there is a rack 9 extending along its axis.
is fixed. A binion 10 meshes with the rack 9. An end portion of a drive shaft 11 is fixed to the pinion 10 . A guard 12 is fixed to the other end of the drive shaft 11 . this,
The drive shaft 11 is supported by passing through the core temperature pipe 13.

The eight-circle core pipe 13 is fixed to the tank 14.

, a sensor 50 is provided in connection with the driving Ill.
(The end portion 16 of the cap-shaped body 15 is fixed to the drive shaft 11. A coil spring 17 is housed in the cap-shaped body 15. The −gM portion of the coil spring 17 is fixed to the tank 4. and the other end is fixed to the cap-shaped body 15. The coil spring 1
7. When the knob 12 is operated and the lead 1 is exposed upward from the opening 5, energy is stored, and the spring force of the coil spring 17 causes the lead 1 to sink downward from the opening 5. Acts on the direction. Kerosene 18, which is a liquid fuel, is stored in the fuel tank 14, and the lower part of the wick 1 is immersed in this kerosene 18.

A ratchet wheel 20 is fixed to the drive shaft 11 . A pawl 23 of a lever 22 that is pivotally supported to the fuel tank 14 by a pin 21 so as to be freely angularly displaceable can be engaged with the ratchet wheel 20 . The spring 24 biases the pawl 23 in the direction in which it locks with the ratchet wheel 20. The ratchet wheel 20 is engaged with the pawl 23 to rotate the drive shaft 1.
1 prevents the core 1 from being displaced downward by the torsion spring force of the coil spring 17, and allows the core 1 to be displaced upward by operating the knob 12. An end 26 of a lever 25 can abut against the lever 22 . This lever 25 is supported by a pin 27 on the fuel tank 14 so that it can be rotated and angularly displaced.

Spring 28 biases lever 25 such that end 26 causes angular displacement of lever 22 in the direction of arrow 29. A locking pin 30 projects from the other end of the lever 25. The locking lever 32 is connected to a pin 3 attached to the fuel tank 14.
It is supported for angular displacement around 3. Locking lever 32
A locking hole 34 is formed in the. This locking hole 34 has a locking step 36, and the locking bottle 30 can come into contact with the locking step 36 and be locked.

Connected to the end 38 of the locking lever 32 is a lower end 40 of a flexible chain 39, as clearly shown in FIG.

The upper end of the chain 39 is connected to a pendulum 41. The pendulum 41 can be seated on a pendulum stand 42. The pendulum stand 42 is
It is fixed to the upper plate 43 of the fuel tank 14. A coil 44 made of a shape memory alloy is disposed between the pendulum stand 42 and the pendulum 41.
is intervened. This coil 44 expands when the temperature of the pendulum stand 42 reaches a transformation point (for example, 70°C) or higher,
Below that temperature, it shrinks as shown by the solid line in FIG. The pendulum stand 42 is a part that should not reach an abnormally high temperature, for example, 70° C., when kerosene is burning in the upper part of the wick l.

Sensation 1: In the case of the portable stove 50, if the oil portable stove moves or even falls over, it will come off the pendulum stand 41 seated on the pendulum stand 42 and fall down.

The chain 39 therefore pulls the end 38 of the locking lever 32 upwards. This causes the locking lever 32 to be angularly displaced around the pin 33 in the direction of the arrow 51. Therefore, the locking pin 30 is in contact with the locking step 36 of the locking lever 32.
then separates from the stepped portion 36. Therefore lever 2
5 is angularly displaced around pin 27 in the direction of arrow 52 by the spring force of spring 28. The end 26 of the lever 25 is therefore angularly displaced around the pin 21 against the spring force of the spring 24, pushing the lever 22 upward in the direction of the arrow 29.

Therefore, 23 pawls are detached from the ratchet wheel 20. Therefore, the coil spring 17 rotationally drives the small moving shaft 11, displaces the core holder 8 in the direction of the arrow 53, and stores the upper part of the core 1 in the opening 5 by sinking it into the opening 5. In this way, the burning oil portable stove is extinguished and safety is maintained.

When the temperature of the fuel tank 14 near the pendulum platform 42 is below the transformation point of the coil 44, the coil 44 is contracted as shown in FIG. 1, as described above. When the temperature around the pendulum stand 42 rises and exceeds the transformation point, the coil 44 expands as illustrated in FIGS. 3 and 4, causing the pendulum 41 to detach from the pendulum stand 42 and fall down. An operation equivalent to that when the vibration occurs is performed, and the seismic sensor 50 is activated.

In this way, the wick 1 is housed in the opening 5 and the fire is extinguished. Thereafter, when the ambient temperature falls below the transformation point, the coil 44 can return to its original contracted state.

The present invention is not limited to being implemented in connection with oil portable stoves, but can be implemented in a wide range of ways in connection with other liquid fuel combustion appliances. Other shapes may be used instead of the shape of the coil 44. Vessel 5
0 may have a different configuration from the illustrated embodiment.

Effects As described above, according to the present invention, when a part that should not have an abnormally high temperature reaches an abnormally high temperature, a member made of a shape memory alloy activates a seismic sensor to extinguish the fire. Therefore, safety is improved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a sectional view showing the structure related to the core 1, FIG. 3 is a sectional view of the vicinity of the pendulum 41, and FIG. FIG. 3 is a front view in the illustrated operating state. 1... Core, 2... Inner tube, 3... Outer tube, 4... Main body, 5... Opening, 8... Core holder, 9... Rack, 10... Binion , 11... drive shaft, 12...
Knob, 17... Coil spring, 18... Kerosene, 20
...Model car, 23...claw, 22゜25...lever,
32...Latching lever, 24.28...Spring, 39.
...chain, 41...pendulum, 42...pendulum stand, 44...
・Shape memory alloy coil agent Patent attorney Kei Nishi Figure 1 Figure 2 Figure 4 Figure 3

Claims (1)

[Claims] The upper part of the wick, the lower part of which is immersed in liquid fuel, rises through an opening formed in the main body to burn the liquid fuel, and when vibrations are detected by a seismic sensor, the wick is housed in the opening. In a safety device for liquid combustion equipment, a member made of a shape memory alloy is installed in a part of the combustion equipment that should not reach abnormally high temperatures, and this shape memory alloy ff1
5. Safety equipment for liquid combustion equipment, characterized in that the material displaces when an abnormally high temperature is detected to cause a sensation γ (1 device).