JPS6233095Y2 - - Google Patents

Description

[Detailed description of the invention] For example, if a fire breaks out in the engine room of a boat, and the fire directly hits the exposed sealing parts of fuel accessories such as the carburetor or fuel filter, the sealing material may be altered or burned, causing the fuel inside to leak out and making the fire worse.

In the present invention, a fireproof cover is placed over the entire exposed area of the sealing material with an air layer in between to prevent the sealing material from coming into direct contact with fire, and will be explained below with reference to the drawings.

Figure 1 shows the structure of the fire cover for the diaphragm type carburetor seal part, where 1 is the diaphragm type carburetor body, 2 is the pump part, 3 is the top-opening cup-shaped fire cover (made of SUS, etc.), 4 is the fuel inlet. Inside the pump section 2, a plurality of non-heat resistant diaphragms 5 are sandwiched between the carburetor body 1 and the pump case 7 or between the pump cases 7, 7, with their outer peripheries being held by gaskets 6. It is fastened together with the pump case 7 to the carburetor body 1 with a plurality of bolts.
The fuel inlet 4 is fastened to the case 7 with a bolt 9 via a gasket 8. Fire cover 3
It is press-formed from SUS material, etc., and has a hole 10 through which the fuel inlet 4 passes in the side wall above the bottom surface.
It is attached to the case 7 via a collar 12 with a plurality of bolts 11. 13 is an air layer formed inside the fireproof cover 3. It is also possible to fill the air layer 13 with a heat insulating material.

Non-heat resistant diaphragm 5 with the structure shown in Figure 1
Since the entire periphery of the gasket 6 and the entire periphery of the gasket 6, which may be deteriorated by heat, is completely covered by the fire cover 3 through the air layer 13, even if a fire occurs in the engine room, the fire will not be transmitted to the fire cover 3.
The air layer 13 prevents heat from propagating. As a result, burnout of the diaphragm 5, deterioration of the gasket 6, and leakage of fuel due to this can be reliably prevented.

As explained above, in the present invention, the diaphragm pump part 2 is attached to the lower end of the diaphragm carburetor main body 1 facing the space in the engine compartment.
Tighten and fix the diaphragm 5 with a plurality of bolts, and connect the outer periphery of the diaphragm 5 between the outer periphery of the carburetor body 1 and the pump case 7 at the upper end of the pump section, and between the outer peripheries of the plurality of pump cases 7, 7 in the pump section. 6, a press-molded fire protection cover 3 with an upwardly opening cup shape is fitted from below to the entire pump part including the exposed outer periphery of the diaphragm 5 and gasket 6 with an air layer 13 in between. A fuel inlet pipe insertion hole 10 is provided in the side wall above the bottom surface of the fire prevention cover 3, which is fixed and extends slightly above the exposed part of the diaphragm, and leads to the pump part 2.
Since the lower part is used as a fuel tray, the following special effects can be obtained. In other words, in a diaphragm type carburetor, fuel tends to leak from the diaphragm 5 (sealing material) between the carburetor body 1 and the upper end pump case 7 and between the pump cases 7 and 7, so even if fuel leaks, the fuel It is especially important to ensure that the fire cover 3 is completely closed at the bottom. It is a cup-shaped press-formed product that opens at the top, and the fuel inlet pipe insertion hole 10 is also provided above the bottom surface, so a completely closed leakage fuel tray is created below the hole 10, ensuring that fuel drips. can be prevented.
Moreover, the fire protection cover 3 can be easily made into a shape that follows the contour of the pump part 2 having a complex shape, the pump part 2 including the fire protection cover 3 is not bulky, and the fire protection cover 3 can be finished in a lightweight and inexpensive manner. Since the fire cover 3 covers the exposed peripheral portion of the diaphragm 5, the appearance is also improved. Also, since the fire cover 3 is open only at the top end and extends upward from the diaphragm 5 at the top end, it goes without saying that the rising fire will not reach the gasket 6 from below, but will also prevent the air layer 13 inside the fire cover 3 from reaching the gasket 6 from below. Since the air is still, fire will not penetrate downward into the air layer 13 from the upper end opening of the fire protection cover 3. Therefore, the exposed parts of the seal material such as the gasket 6 can be reliably shielded and protected from fire.
Deterioration and burnout of the sealing material can be prevented as much as possible. Further, since the fire cover 3 is open at the upper end, the expansion of the air in the air layer 13 can be released even when the outside temperature rises, and problems caused by applying high pressure from the outside to the gasket 6 etc. do not occur.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a carburetor to which the present invention is applied. 1... Carburetor body (fuel accessory), 3...
Fire cover, 5... diaphragm (sealing material),
6...Gasket (sealing material), 13...Air layer.

Claims (1)

[Scope of utility model registration request] The diaphragm type pump part 2 is tightened and fixed to the lower end of the diaphragm type carburetor body 1 facing the space in the engine room with a number of bolts, and the diaphragm type pump part 2 is tightened and fixed to the lower end of the diaphragm type carburetor body 1 facing the space in the engine room. Multiple pump cases 7, 7
The outer circumferential part of the diaphragm 5 is pressed between the outer circumferential parts of the diaphragm 5 through the upper and lower gaskets 6,
A press-molded fire protection cover 3 that opens upward is fitted and fixed from below to the entire pump section including the exposed outer periphery of the diaphragm 5 and the gasket 6 via an air layer 13, extending slightly above the exposed portion of the diaphragm. A fire prevention device for a fuel auxiliary device for an internal combustion engine, characterized in that a fuel inlet pipe insertion hole 10 extending to the pump part 2 is provided in the side wall above the bottom surface of the fire prevention cover 3, and the lower part thereof is used as a fuel receiving tray. .