KR20010045848A - The Evaporator having a valve for preventing an upstream current - Google Patents

Abstract

PURPOSE: A liquid/gas phase selection type carburettor incorporating a backflow prevention valve is provided to supply fuel smoothly and shut off a tube channel of a damaged tube part immediately for preventing fuel leakage and explosion accidents due to the backflow of the liquid or gas fuel into the damaged tube part. CONSTITUTION: A liquid/gas phase selection type carburettor incorporating a backflow prevention valve includes an electronic valve body(110) formed with a central through hole(111) in the center to be connected to a liquid phase fuel supply part and a gas phase fuel supply part and coupled with a filter at a lower part, and a gas leakage shutoff element(140) provided in the central hole with elasticity and contacting characteristics, wherein the electronic valve body is coupled with a liquid phase electronic valve at a side and a gas phase electronic valve at the other side integrally.

Description

Liquid with a built-in check valve. The Evaporator having a valve for preventing an upstream current}

The present invention relates to a carburetor which is a fuel supply system of a vehicle. In particular, the liquid or gaseous fuel supplied to the carburetor is selectively supplied by an electronic control valve attached to the carburetor. Liquid with a built-in backflow check valve that has a function. A vapor selective vaporizer.

In general, the gas fuel supply system for automobiles is provided with a solenoid valve for liquid and gas phase selection at all stages of the preheater, so that liquid or gaseous fuel is selected according to the engine temperature conditions. It is configured to be fed into the mixer and into the combustion chamber.

That is, as shown in Figure 5 and the overfill prevention valve (2) for the proper filling of the fuel tank (1) when filling the fuel and the liquid supply valve (3) for supplying the fuel in the liquid state; A gas supply valve 4 for supplying gaseous fuel, an emergency shutoff valve 5 for emergencyly shutting off fuel supplied from the liquid supply valve 3, and a gas supply valve 4, and a separate fuel pipe 7 Vaporizer, which is connected to the liquid fuel or gaseous fuel to be selectively supplied, is a part separately separated by a separate fuel pipe (7) from the liquid, gas phase selection valve (6) and the liquid, gas phase selection valve (6) Fuel supply is provided by the system up to 8).

As shown in FIG. 6, the internal structure of the conventional vaporizer 8 has a preheating chamber 9, and fuel is introduced through the connector 11 fixed to the preheating chamber cover 10 to purify the filter 12. After going through the preheating chamber (9).

However, such a conventional fuel supply device is to be assembled by a separate fuel pipe (7), so that a large number of parts are required to install in the engine compartment of the complex structure of the engine compartment parts of the vehicle, such as assembly difficulties and confidentiality There was a problem due to the complexity.

Therefore, the present applicant is a vehicle LP gas liquid through Utility Model Registration No. 145819. We have proposed and registered a vapor selective vaporizer.

The gist of the pre-registered utility model is installed on the path from the fuel tank to the engine in the fuel supply system of a vehicle using LP gas fuel, as shown in FIG. In the fuel supply device consisting of a liquid-phase, gaseous phase selection valve for supplying the fuel and a vaporizer connected thereto, the filter chamber 33 is integrally coupled to the fuel inlet of the vaporizer, the primary filter 34 is built in the center ) Is formed, and is sealed by the filtration chamber cover 31 which can be opened and closed by the fixing screw 32 on the upper side, and the solenoid valve body 30 to which the secondary filter 36 is coupled; One side of the solenoid valve body 30 is coupled to the liquid solenoid valve 10, the other side is characterized in that the electromagnetic solenoid valve 20 is coupled to be configured integrally.

However, when the pipe connected to the solenoid valve is broken, there is no security measure against the accident that the liquid fuel or the gaseous fuel flows back to the damaged pipe.

In other words, there is no concern of a large accident in case of no need for a separate valve device for blocking the flow back from the liquid phase to the gas phase, or from the gas phase to the liquid phase.

In order to solve this problem, in the present invention, while the fuel supply is made smoothly, in case of emergency, the liquid containing the non-return valve to prevent the problem of backflow by immediately blocking the conduit of the damaged part. The purpose is to provide a vapor selective vaporizer.

1 is a block diagram of a fuel supply system to which the present invention is applied.

2 is a partial cross-sectional view showing the configuration of the present invention.

Figure 3 is a cross-sectional view showing the main operating state of the present invention.

4 is a front view showing another embodiment of the present invention.

5 is a block diagram showing a conventional fuel supply system.

6 is a longitudinal cross-sectional view of a conventional vaporizer.

7 is a conventional liquid. Cross section of vapor selective vaporizer.

* Description of the symbols for the main parts of the drawings *

100: carburetor 110: solenoid valve body

111: center hole 112: filter

120: liquid solenoid valve 130: meteorological solenoid valve

140: gas leakage blocking member 141: spring hook

200: fuel tank 210: overcharge prevention valve

220: liquid supply valve 230: gas phase supply valve

240: emergency shutoff valve 250: piping

In order to achieve the above object, the present invention is installed on the path from the fuel tank to the engine in the fuel supply system of the vehicle using the LP gas fuel, select the liquid or gaseous fuel In the vaporizer is composed of a solenoid valve for selecting the liquid and gaseous fuel to be supplied integrally coupled to the fuel inlet of the carburetor, there is a central through-hole connected to the liquid fuel supply and the gaseous fuel supply in the inner center, the filter is Coupled solenoid valve body; A liquid solenoid valve is coupled to one side of the solenoid valve body, and a gas solenoid valve is coupled to the other side so as to be integrally formed, but a gas leakage blocking member having elasticity and adhesion to a central through-hole connected to each other from the liquid solenoid valve and the meteorological solenoid valve. When the one side of the pipe is broken is broken by the gas leaking member that is activated by itself instantaneously characterized by having a safety by blocking the fuel supply lowered in pressure.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of a fuel supply system to which the present invention is applied, and a vaporizer through a pipeline 250 from a fuel tank 200 having an overcharge preventing valve 210, a liquid supply valve 220, and a gas phase supply valve 230. Fuel is supplied to (100) but the liquid and gaseous phases are separately supplied through different pipes.

2 is a partial cross-sectional view showing the configuration of the present invention, the central through-hole 111 is connected to the liquid fuel supply unit and the gas phase fuel supply unit in the inner center, the lower side of the solenoid valve body 110 is coupled to the filter 112 Wow; One side of the solenoid valve body 110 is coupled to the liquid solenoid valve 120, the other side of the solenoid solenoid valve 130 is configured to be integrally formed from the liquid solenoid valve 120 and the meteorological solenoid valve 130 The central through-holes 111 connected to each other are provided with a gas leakage blocking member 140 having elasticity and adhesion.

The gas leakage blocking member 140 is installed in the central through-hole 111 installed in the solenoid valve body 110, and the spring lock 141 is fastened and fixed therein.

The gas leakage blocking member 140 is installed with an elastic and soft Elp gas resistant rubber tube.

The operating state of the present invention configured as described above can be seen by the main operation state shown in FIG.

The figure shows an example in which the gaseous fuel is supplied to one side, and one side of the gas leakage blocking member 140 is biased inward to open the conduit.

That is, the gas leakage blocking member 140 inserted into the central through hole 111 formed inside the solenoid valve body 110 of the present invention and installed in close contact with the inner wall surface of the central through hole 111 is not supplied with fuel. While maintaining the state in close contact with the wall when fuel is supplied, one side is distorted and opened as shown in order to smoothly supply the fuel. When the fuel supply is stopped, the fuel cell is returned to its original state and is in close contact.

In addition, in the event of an accident such as damage on one side of the pipeline, since the pressure drops rapidly on the damaged side of the pipeline, the gas leakage blocking member 140 immediately returns to its original state and is closely adhered to prevent the backflow of fuel through the pipeline. It is to function.

Figure 4 is a front view showing another embodiment of the present invention to simplify the structure of the interior showing that it is possible to design in a simpler configuration.

In another embodiment of the present invention, by installing a pressure sensing switch at a predetermined position on the pipeline, when the pipeline is damaged, a sudden pressure drop is activated to operate the emergency shutoff valve to shut off the fuel supply, thereby providing a safer safety device. It can also function.

In the present invention as described above, the liquid fuel and the gaseous fuel are supplied through separate pipes, respectively, in the fuel system supplied by being mixed and supplied in the vaporizer. It is possible to promote safer operation by preventing the problems such as accidents leaking back into the pipeline immediately, and it is very useful technology to prevent large explosion accidents in advance.

Claims (3)

L. It is installed on the path from the fuel tank to the engine in the fuel supply system of a vehicle using LP gas fuel. The solenoid valve selects liquid and gaseous fuel to select and supply liquid or gaseous fuel. In the carburetor integrally coupled to the fuel inlet of the carburetor, A central through hole 111 connected to the liquid fuel supply part and the gaseous fuel supply part at an inner center thereof, and a solenoid valve body 110 having a filter 112 coupled thereto at a lower side thereof; One side of the solenoid valve body 110 is coupled to the liquid solenoid valve 120, the other side of the solenoid solenoid valve 130 is configured to be integrally formed from the liquid solenoid valve 120 and the meteorological solenoid valve 130 The central through-holes 111 connected to each other is a liquid containing a non-return valve, characterized in that the gas leakage blocking member 140 having elasticity and adhesion is installed. Weather Selective Vaporizer. The method of claim 1, The gas leakage blocking member 140 is a liquid having a built-in backflow check valve, characterized in that the elasticity and soft elastic LPG rubber tube. Weather Selective Vaporizer. The method of claim 1, The gas leakage blocking member 140 is installed in the central through-hole 111 installed in the solenoid valve body 110, and a spring lock 141 is fastened and fixed therein. Liquid. Weather Selective Vaporizer.