KR200222294Y1 - Apparutus for defending backward-flow of lpg - Google Patents

Abstract

The present invention prevents gas backflow from another cylinder when a gas leak occurs due to damage of the high pressure hose in the LPG supply system.

An LPG supply system in which a high pressure hose P is extended from a plurality of LPG cylinders B1, ..., Bn to be connected to a conduit L, and the conduit L is extended to supply LPG to a consumer. It is a structure comprised by connecting the said high pressure hose P and the conduit L with the pipe joint J in which (V) was built.

Description

LPG backflow prevention mechanism {APPARUTUS FOR DEFENDING BACKWARD-FLOW OF LPG}

The present invention relates to a backflow prevention mechanism of an LPG supply system such as liquefied petroleum gas (hereinafter referred to as LPG).

By placing as many cylinders (B1, ..., Bn) as necessary in the LPG supply facility, extending the high pressure hoses (P1, ..., Pn) from each cylinder and connecting them to the pipeline (L) via the pipe joint (J), This pipeline L is extended to the consumer to supply LPG (see FIGS. 1 and 3A). In another conventional example, when a check valve V is provided upstream of the pipe joint J, LPG backflow from another bomb via the pipeline L when the high pressure hose P is damaged is prevented. There is a blockage (see Figure 3b).

In the prior art, when the high pressure hose is damaged, the corresponding LPG of the cylinder prevents leakage by the overflow prevention mechanism (not shown). There is a potential risk of explosion fires.

In addition, in the latter technique, it is possible to prevent backflow of LPG, but there is a problem in that the cost of facility construction is high because a check valve must be provided at the previous stage of the pipe joint.

In view of the above problems, the present invention adopts a pipe joint in which a back flow prevention function is incorporated in a connection portion between a high pressure hose and a pipe line, thereby preventing backflow of LPG and excluding an explosion risk of leaked LPG. It is a subject to provide a backflow prevention mechanism.

1 is an explanatory diagram of an embodiment;

2 is a longitudinal cross-sectional view of a pipe joint with a check valve piece;

3 is an explanatory diagram of a prior art.

Explanation of symbols on the main parts of the drawings

B1,... , Bn: bomb H: discharge port

J: Pipe joint L: Pipe line

O: openings P, P1,... , Pn: High Pressure Hose

R: Pressure reducing regulator S: Spring

Sc: screw V: check valve

Vm: valve seat

In order to solve the above problems, from the plurality of LPG cylinders (B1, ..., Bn), the high-pressure hoses (P1, ..., Pn) are extended to be connected to the pipeline (L), and the pipeline (L) is extended to each consumer. In the LPG supply system which supplies LPG, the structure which connects the said high pressure hose P and the pipe line L with the pipe joint J in which the check valve V was built is adopted.

When the high pressure hose is damaged, the present invention configured as described above reduces the internal pressure of the piping system and decreases the pressure of the spring, thereby closing the check valve, thereby preventing the leakage of LPG backflow of the other bomb via the pipeline. Can be.

(Example)

Next, an embodiment of the present invention will be described with reference to FIGS. 1 and 2. The high pressure hoses P1, ..., Pn extend from the LPG discharge ports H of the plurality of cylinders B1, ..., Bn, and a check valve V for preventing backflow from the pipe line L is built in the front end thereof. Pipe joint J is connected. As shown in Fig. 2, the pipe joint J in which the check valve V is incorporated has a check valve V and a check valve V on the connection side of the high pressure hose P, and the valve seat Vm. Spring (S) for applying a force in the opposite direction) is inserted, each opening (O) is formed with a screw (Sc) connecting the high-pressure hose (P) and the pipe line (L), the corresponding pipe line (L) And high pressure hose (P).

When all of the high pressure hoses P1, ..., Pn are normal, a predetermined pressure is applied to the check valve V, the check valve V stops in contact with the A part, and LPG flows from the cylinders B1, ..., Bn. However, if the high pressure hose P1 connected to the cylinder B1 is damaged, the pressure in the high pressure hose P1 becomes the atmospheric pressure, and the LPG of the other cylinders B2, ..., Bn flows backward through the pipe and the pressure When the pressure of the spring S is relatively applied to the check valve V, the check valve V blocks the back flow of the millier LPG toward the valve seat Vm. In the drawings, R is a pressure reducing regulator.

As described above, the present invention is intended to prevent explosion fire by preventing backflow and leakage waste of LPG in the LPG supply system.

Claims (1)

The high pressure hoses P1, ..., Pn are extended from the plurality of LPG bombs B1, ..., Bn to be connected to the pipeline L, and the pipeline L is extended to each consumer. In the LPG supply system for supplying LPG, By connecting the high pressure hose (P) and the conduit (L) with a pipe joint (J) with a built-in check valve (V) When the high pressure hose of the cylinder is damaged and the pressure of the high pressure hose is at atmospheric pressure, the flow of LPG which tries to flow back from the normal high pressure hose to the damaged high pressure hose through the pipe joint J is performed. LPG backflow prevention mechanism characterized by preventing by the check valve (V).