Automatic fuel heater shut-off device

Abstract

The present application relates to a kind of automatic closing device of fuel heater, including lampwick device, flameout switch and decorative cover;Wherein, in the horizontal operating rod of flameout switch, heavy ball is hung, and there is movement gap between heavy ball and the surface of operating rod, using the pulling or impact of asynchronous action formed when shaking, causes the action of flameout switch, achieves the purpose of automatic closing and extinguishing when in shaking environment and dumping.The present application has the characteristics of novel concept, reasonable design, light structure, beautiful appearance, sensitive reaction.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of heating and warming, and particularly relates to an automatic closing device of a fuel heater, which can trigger closing and produce flameout protection even in a vibrating environment. BACKGROUND

[0002] The fuel heater is widely used in fields, especially in fields without power supply, such as fields in the wild or disaster sites. However, the fuel heater is a type of open fire heat radiation, and safety in use is also a factor that must be considered in setting, especially for small fuel heaters. The fuel heater is provided with a lampwick installed at the center to adjust the size of the flame and the flameout function. The main body comprises a lampwick device, a flameout rocker switch and a decorative cover. The adjusting shaft for driving the lampwick to ascend and descend is extended to the outside of the oil tank, and a reset torsion spring, a ratchet wheel and a knob are sequentially installed on the adjusting shaft. The flameout switch is fixed with a rotation-stopping shaft at one end and is provided with an operating lever at the other end. The flameout switch is positioned on the oil tank through a pin shaft, and a small torsion spring is sleeved on the pin shaft. The small torsion spring always keeps the rotation-stopping shaft buckled on the ratchet wheel to form the energy storage of the reset torsion spring. The decorative cover is installed on the outside of the oil tank to cover the ratchet wheel and the flameout switch, and the handle of the operating lever is exposed outside the decorative cover. When operating, the adjusting knob can adjust the height of the lampwick, and the rotation-stopping shaft keeps the height of the lampwick. Once the locking of the ratchet wheel by the rotation-stopping shaft is released, the reset torsion spring can drive the adjusting shaft to rotate and drive the lampwick to descend and be extinguished. This is the most basic fuel heater, and later, a function of anti-toppling protection is added, such as:

[0003] CN201320239544.4 sets a freely rolling steel ball in the space below the operating lever of the flameout switch. When the device is accidentally toppled, the rolling steel ball hits the flameout switch to release the constraint of the ratchet wheel by the rotation-stopping shaft, and the spring force of the reset torsion spring drives the lampwick to descend and be extinguished. However, the protection device cannot achieve the flameout protection when the device is not toppled but vibrates, such as when the device is vibrated due to an earthquake or environmental collapse.

[0004] How to provide a protection device capable of timely closing and extinguishing the flame when the device is vibrated or toppled has become the research object of the present application. SUMMARY

[0005] The present application aims to design an automatic closing device of a fuel heater, in which a heavy ball is hung on the flameout switch to drive the flameout switch to act.

[0006] The technical scheme of the present application is implemented as follows: an automatic closing device for a fuel heater comprises a wick device, an extinguishing switch and a decorative cover; an adjusting shaft for driving the wick to ascend and descend extends out of the oil tank, and a return torsion spring, a ratchet wheel and a knob are sequentially arranged on the adjusting shaft; the extinguishing switch is fixed with a rotation-stopping shaft at one end and has an operating lever at the other end, is positioned on the oil tank through a pin shaft, and is sleeved with a small torsion spring on the pin shaft, which always keeps the rotation-stopping shaft buckled on the ratchet wheel; the decorative cover is arranged on the outer side of the oil tank, and the ratchet wheel and the extinguishing switch are covered in the decorative cover, while the handle of the operating lever is exposed outside the decorative cover for manual closing; characterized in that: a heavy ball is hung at the end of the operating lever of the extinguishing switch, and a movement gap of no more than 5mm exists between the heavy ball and the surface of the operating lever.

[0007] The heavy ball has a through hole in the center, a rope or a wave bead chain with a limiting knot at one end passes through the through hole and is hung on the operating lever, and a movement gap exists between the heavy ball and the rope or the wave bead chain, so that they can move relatively.

[0008] The heavy ball is hung on the operating lever, which means that the heavy ball is hung on the upper surface of the operating lever and is constrained on the upper surface of the operating lever by the rope or the wave bead chain, so as to avoid rolling out of the operating lever area.

[0009] The heavy ball is hung on the operating lever, which means that the heavy ball is hung on the lower surface of the operating lever and is constrained on the lower surface of the operating lever by the rope or the wave bead chain, so as to avoid drifting out of the projection area of the operating lever.

[0010] A fixing plate is welded below the adjusting shaft corresponding to the oil tank, the extinguishing switch is rotatably positioned on an adapter plate through a pin shaft, the decorative cover is also locked on the adapter plate, and the adapter plate is locked on the fixing plate, so as to form an assembly structure with the oil tank.

[0011] The extinguishing switch is an L-shaped sheet metal part with one short end and one long end, the pin shaft is arranged at the bending part, the rotation-stopping shaft is fixed at the short end, and the long end serves as the operating lever.

[0012] The present application has the characteristics of novel concept, reasonable design, light structure, beautiful appearance and sensitive response; the unstable state of the hung heavy ball and the asynchronous action between the operating lever end of the extinguishing switch and the heavy ball when vibrating can produce a pulling or impact feedback in time until causing the action of the extinguishing switch, so as to achieve the purpose of automatic closing and extinguishing in the vibrating environment and when being tilted. BRIEF DESCRIPTION OF DRAWINGS

[0013] The present application will be further described below in combination with specific examples:

[0014] Figure 1 It is a schematic view of the automatic closing device for the fuel heater

[0015] Figure 2 Decomposition diagram of automatic closing device for fuel heater

[0016] Figure 3 Diagram of relationship between ratchet and switch

[0017] Figure 4 Diagram of relationship between switch and heavy ball

[0018] wherein

[0019] 1 - oil tank 11 - fixed sheet 2 - wick device 21 - wick

[0020] 22 - adjusting shaft 23 - return torsion spring 24 - ratchet 25 - knob

[0021] 3 - switch 31 - rotation-stopping shaft 32 - operating lever 33 - pin shaft

[0022] 34 - small torsion spring 35 - adapter sheet 4 - decorative cover 5 - heavy ball

[0023] 51 - through hole 6 - wave bead chain 61 - limiting knot DETAILED DESCRIPTION

[0024] Referring to Figures 1 to 4 , the automatic closing device for fuel heater comprises an oil tank 1, a wick device 2, a switch 3 and a decorative cover 4.

[0025] The adjusting shaft 22 in the wick device 2, which drives the wick 21 to go up and down, extends outside the oil tank, and the return torsion spring 23, the ratchet 24 and the knob 25 are sequentially installed on the adjusting shaft 22. The wick 21 can be driven to go up and down by rotating the knob 25, and the flame size can be adjusted by lifting up, and the flame can be extinguished by lowering down.

[0026] The switch 3 has a rotation-stopping shaft 31 at one end and an operating lever 32 at the other end, and is positioned on the oil tank 1 through the pin shaft 33, and a small torsion spring 34 is sleeved on the pin shaft 33, which always keeps the rotation-stopping shaft 31 buckled on the ratchet 24, i.e. buckled on the ratchet teeth, and has a static single-stopping effect. More specifically, the switch 3 is a kind of L-shaped sheet metal part with a short head and a long head, the rotation-stopping shaft 31 is arranged at the bending part, the short end is fixed with the rotation-stopping shaft 31, and the long end is used as the operating lever 32. The operating lever 32 can actually form a flap action, and a small force can be used to release the locking effect on the ratchet 24. Therefore, by cooperating the operating lever 32 with the heavy ball 5, the automatic closing action of shaking and pouring can be realized. In general design, the operating lever 32 is in a horizontal state, the handle part is exposed outside the decorative cover 4, and the switch can be touched and turned off by human force. The decorative cover 4 is installed outside the oil tank 1, and the ratchet 24 and the switch 3 are covered therein.

[0027] The operating rod 32 of the flameout switch is hung with a heavy ball 5, which has a movement gap of no more than 5mm with the surface of the operating rod 32. More specifically, the heavy ball 5 has a through hole 51 in the center, and a rope or bead chain 6 with a limiting knot 61 at one end is threaded through the through hole 51 and hung on the operating rod 32, and the heavy ball 5 and the rope or bead chain have a movement gap and can move relative to each other. The heavy ball 5 is realized to have asynchronous action with the operating rod 32 when shaken, and cooperates with the cantilever effect formed by the long operating rod 32 to increase the pulling force or impact force generated by the heavy ball 5, so as to promote the action of the flameout switch 3 to release the restraint on the ratchet 24.

[0028] The heavy ball is hung on the operating rod and can have the following two states, but no matter what state, the heavy ball 5 always has a tendency to maintain the stop shaft 31 buckled on the ratchet 24 in a static state, and keeps stable in the ignition state.

[0029] I. The heavy ball 5 is hung on the operating rod 32, which means that it is hung on the upper surface of the operating rod 32 and is restrained on the upper surface of the operating rod 32 by the rope or bead chain 6 to avoid rolling out of the operating rod area. That is, it is limited on the upper surface of the operating rod 32 to ensure the position of the pulling or impact point. Figure 2 Figure 3 And Figure 4 The bead chain 6 uses a chain buckle to form a limiting knot 61 at both ends, which can be assembled by clamping with a tool, and is also applicable to the rope structure.

[0030] II. The heavy ball 5 is hung on the operating rod 32, which means that it is hung on the lower surface of the operating rod 32 and is restrained on the lower surface of the operating rod 32 by the rope or bead chain 6 to avoid drifting out of the projection area of the operating rod 32. When shaking or tilting occurs, the heavy ball 5 bounces to hit the lower surface of the operating rod 32 to release the locking of the ratchet 24, and the automatic closing of the wick 21 is realized by the return torsion spring 23.

[0031] Further, the oil tank 1 is welded with a fixed plate 11 below the adjusting shaft 22, the flameout switch 3 is rotatably positioned on an adapter plate 35 through a pin shaft 33, the decorative cover 4 is also locked on the adapter plate 35, and the adapter plate 35 is locked on the fixed plate 11, forming an assembly structure with the oil tank 1.​

Claims

1. A kind of fuel heater automatic closing device, including lamp wick device, flameout switch and decorative cover;The adjusting shaft of the lamp wick device driving lamp wick to lift and extend outside the oil tank, and reset torsion spring, ratchet and knob are successively installed on the adjusting shaft;The flameout switch one end is fixed with rotation stop shaft, the other end is operating lever, the flameout switch is positioned on the oil tank by pin shaft, and a small torsion spring is set on the pin shaft, the small torsion spring always keeps rotation stop shaft buckle on ratchet;Decorative cover is installed on the outside of oil tank, and ratchet and flameout switch are covered in it, The handle of the operating rod is exposed outside the decorative cover to facilitate manual closing; characterized in that: the operating rod end of the flameout switch is hung with a heavy ball, and there is a movement gap of no more than 5mm between the heavy ball and the surface of the operating rod; the heavy ball has a through hole in the center, a rope or a wave bead chain with a limiting knot at one end passes through the through hole and is hung on the operating rod, and there is a movement gap between the heavy ball and the rope or wave bead chain, which can move relatively; the oil tank corresponds to the lower side of the adjusting shaft and is welded with a fixed plate, the flameout switch is rotatably positioned on an adapter plate through a pin shaft, the decorative cover is also locked on the adapter plate, and the adapter plate is locked on the fixed plate through the adapter plate, forming an assembly structure with the oil tank.

2. The automatic shut down device for fuel heater as claimed in claim 1 wherein: The heavy ball is hung on the operating rod, which means that it is hung on the upper surface of the operating rod and constrained on the upper surface of the operating rod by a rope or a wave bead chain to avoid rolling out of the operating rod area.

3. The automatic shut down device for fuel heater as claimed in claim 1 wherein: The heavy ball is hung on the operating rod, which means that it is hung on the lower surface of the operating rod and constrained on the lower surface of the operating rod by a rope or a wave bead chain to avoid drifting out of the operating rod projection area.

4. The automatic shut down device for fuel heater as claimed in claim 1 wherein: The flameout switch is a type of L-shaped sheet metal part with a right-angle bend, with one end short and the other end long, the pin shaft is arranged at the bend, the short end is fixed with a rotation-stopping shaft, and the long end serves as the operating rod.

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