JPS6314188Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heater mounting device for a liquid fuel vaporizing combustor.

Generally, a liquid fuel vaporization type combustor vaporizes liquid fuel (for example, petroleum) through a vaporizer, injects it from a nozzle, and ignites it with an ignition device to combust it. At this time, in order to vaporize the oil, a heater made of ceramic or the like is attached to the outer wall of the vaporizer to maintain the vaporizer at a high temperature (400 to 500 degrees Celsius) for a long period of time. Conventionally, a plurality of screws were used to attach the heater to the carburetor, resulting in problems such as increased assembly costs and poor serviceability.

In view of the above, the present invention aims to provide a heater mounting device that can reduce assembly costs and improve serviceability by eliminating heater mounting screws.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.
A plate-shaped ceramic heater is brought into contact with the heater cover 4, and a heater holder 3 is provided on the heater cover 4, which is movable in the direction of pressing the heater 2 toward the vaporizer. A spring 5 is provided between the heater holder 3 and the heater cover 4,
A heater cover engagement piece 6 is attached to the outer wall 1a of the vaporizer 1.
, and engaging claws 7a and 7b that removably engage with the engaging piece 6 are formed at the lower end of the heater cover 4.

The vaporizer 1 is made of brass, and has an inflow passage 8 for flowing liquid fuel (petroleum) into it, a vaporization passage 9 for vaporizing the petroleum, and a jet for spouting the vaporized fuel from an injection nozzle 10. Passage 1
1 is formed, and a planar mounting portion 12 for mounting the heater 2 is formed on the outer wall 1a of the vaporizer 1. The heater cover 4 is made of stainless steel (for example, SUS430) and is formed in a U-shape from an upper plate 4a and a pair of side plates 4b, 4c. A central hole 14 is formed. In addition, the heater holder 3 is made of stainless steel (SUS430).
The spring receiving piece 3a and a pair of lower pieces 3b, 3c are formed into a substantially U-shaped cross section, and the lower pieces 3b, 3c are fitted into the guide holes 13 of the heater cover 4 and arranged inside the cover, The lower pieces 3b, 3c are bent into an L shape to form a flat pressing portion 3d.
Further, a T-shaped spring support 15 made of stainless steel is slidably fitted into the center hole 14 of the heater cover 4, and its horizontal rod portion 15a is arranged inside the heater cover 4, and the upper end of the vertical rod portion 15b A disc-shaped washer 17 is irremovably fitted with the split pin 16, and the washer 17 constitutes a spring receiving portion. The washer 17 and the receiving piece 3 of the heater presser 3
The compression spring 5 is interposed between the spring 5 and a. Further, the heater 2 is made of a heat insulating material (for example, asbestos)
It is covered with a heater support 19 made of stainless steel (SUS430) through a sheet 18 made of stainless steel, and the heater support 19 is pressed against the heater holder 3.

In this embodiment, a pair of left and right overhangs for screw holes 21 for attaching the carburetor 1 to the support frame 20 are formed on the outer periphery of the mounting portion 12 of the carburetor 1. The projecting portion is used as the engagement piece 6. and each side plate 4 of the heater cover 4
b, 4c, the lower part of which is the pair of engagement pieces 6, 6.
Each side plate 4 is formed to have a dimension shorter than the distance between
The distance between the outer ends of the pair of engaging claws 7a, 7b integrally formed on the lower sides of both ends of the engagement claws 7a, 4c is larger than the distance between the engaging pieces 6, 6.

Next, to explain how to install the heater, first, attach the heater cover 4 to the heater holder 3, spring support 15,
The spring 5, washer 17, and split pin 16 are assembled to form a heater cover assembly. Then, the sheet 18 and the heater 2 are inserted into the heater support 19 and attached to the mounting portion 12 of the carburetor 1 as shown in FIG. Then, the engaging claw 7a of the assembled heater cover assembly is engaged with the lower side of the engaging piece 6 of the carburetor 1 from an oblique direction,
Next, only the heater cover 4 is pushed down against the spring 5, and the other engaging claw 7b is engaged with the lower side of the other engaging piece 6 of the carburetor 1, thereby completing the assembly. At this time, the heater presser 3 is urged toward the heater side by the spring 5 and presses against the heater support 19 and the heater 2.

The heater 2 is a heat insulating sheet 1 with low thermal conductivity.
8 and stainless steel heater support 19, the amount of heat released by the heater 2 into the air can be reduced. Furthermore, since the presser portion 3d of the heater presser 3 and the heater support 19 are in surface contact, the compressive force of the spring 5 is evenly applied to the heater support 19, and the heater 2 can be reliably brought into close contact with the vaporizer 1. Also spring 5
is located outside the heater cover 5, and the spring 5
Since the heater holder 3, spring support 15, heater support 19, etc. interposed between the heater 2 and the heater 2 are made of stainless steel with low thermal conductivity, the compressive force of the spring 5 is reduced by the heat from the heater 2. It is possible to prevent inconveniences such as cracking of the heater, disconnection of the heater due to lifting of the heater, and increase in preheating time and power consumption due to a decrease in heat conduction.

As is clear from the above description, the present invention includes a heater holder for pressing the heater toward the vaporizer when the heater comes into contact with the outer wall of the vaporizer for vaporizing liquid fuel, and a heater for covering the heater. A cover is provided, the heater cover is formed of an upper plate and a pair of side plates fixed to both ends thereof, and a heater holding guide hole is formed in the upper plate,
The heater holder is composed of a spring receiving piece disposed on the outside of the upper plate, and a lower heater holding piece fixed to the spring receiving piece and movably fitted into a guide hole of the heater cover, A spring support whose outer end projects outward from the spring receiver is attached to the upper plate of the heater cover, and a spring support formed at the outer end of the spring support and the spring receiver of the heater holder is attached. A compression spring for biasing the lower piece of the heater holder toward the heater is interposed therein, a heater cover engaging piece is formed on the outer wall of the carburetor, and a side plate of the heater cover is engaged with the engaging piece. An engaging pawl is formed that engages removably.

Therefore, according to the present invention, the engaging claw of the heater cover is engaged with the engaging piece of the carburetor, and the spring force is used to hold the heater cover so that it does not come off from the carburetor, and also to attach the heater to the carburetor. can be closely attached,
Compared to the conventional case of fixing the heater to the carburetor with screws, assembly costs can be reduced and serviceability can be improved.

In addition, since the compression spring is located outside the heater cover, it is possible to prevent the compressive force of the spring from decreasing due to heat from the heater, which may cause cracks in the heater, disconnection, and decrease in heat conduction due to the heater lifting up. This has an excellent effect in that it can prevent inconveniences such as increases in preheating time and power consumption.

[Brief explanation of the drawing]

Figures 1 to 7 show an embodiment of the present invention, with Figure 1 being a front view showing the completed assembly, and Figure 2 showing the carburetor in Figure 1 being assembled as seen from the back side. The figure shown in Figure 3 is a view from arrow A in Figure 2, and Figure 4.
The figure is a sectional view taken along the line B-B in FIG. 3, FIG. FIG. 1: vaporizer, 1a: outer wall, 2: heater, 3: heater holder, 3a: spring receiving piece, 3b, 3c: lower piece,
3d: flat plate holding part, 4: heater, 4a: upper plate, 4
b, 4c: side plate, 5: compression spring, 6: engagement piece, 7
a, 7b: engaging claw, 13: heater holding guide hole,
14: Center hole for spring support, 15: Spring support, 15
a: Horizontal rod part, 15b: Vertical rod part, 16: Cotter pin, 1
7: Washer, 18: Seat, 19: Heater support.

Claims (1)

[Scope of utility model registration request] A heater is brought into contact with an outer wall of a vaporizer for vaporizing liquid fuel, and a heater holder is provided to press the heater toward the vaporizer, and a heater cover is provided to cover the heater. It is formed of a plate and a pair of side plates fixed to both ends thereof, a guide hole for a heater holder is formed in the upper plate, and the heater holder includes a spring receiving piece arranged on the outside of the upper plate, and a guide hole for a heater holder. a lower piece for holding down the heater, which is fixed to the spring receiving piece and movably fitted into the guide hole of the heater cover; A protruding spring support is attached, and a compression spring for biasing the lower piece of the heater holder toward the heater is provided between a spring receiving part formed at the outer end of the spring support and the spring receiving piece of the heater holder. A liquid interposed therein, wherein a heater cover engagement piece is formed on an outer wall of the vaporizer, and an engagement claw that detachably engages with the engagement piece is formed on a side plate of the heater cover. Heater mounting device for fuel vaporization type combustor.