JPS6263273A - Gas cock with excessive outgoing preventing mechanism - Google Patents

Abstract

PURPOSE:To enable an excessive outgoing preventing mechanism to be operated in a stable manner even if a gas cock is mounted in any orientation, by a method wherein the valve body of the excessive outgoing preventing mechanism is held in a place through the force of an expandable resilient product. CONSTITUTION:A ball valve 12 of an excessive outgoing preventing mechanism is contained in a gas passage 2 of a gas cock 1, and a cylinder 8 having a valve seat 10, on which the ball valve 12 is seated, is secured thereto. A through- hole is formed in the ball valve 12, and an expandable resilient product 13, e.g., a coil spring, is extended through the through-hole. Both ends of the expandable resilient product 13 are respectively secured in holes 15 in the cylinder 8 by means of a screw 14, and this causes the ball valve 12 to be held in a place.

Description

DETAILED DESCRIPTION OF THE INVENTION - Industrial Application Field The present invention is characterized in that when the amount of gas passing through the gas cock exceeds a predetermined flow rate, a ball valve (fuse ball) built into the gas cock is activated to stop the gas. This relates to a so-called gas cock published by the Overflow Prevention Organization that stops the flow of water.

・Conventional technology and its problems An example of a gas cock with an overflow prevention mechanism is shown in FIG.

The corresponding Ol is the gas cock body, and the main body Ol has a gas inlet 02 at the bottom and a hose end 0 at the side.
A gas passage 04 having a shape of 3 is provided, and a closing member 05
is installed in the taper 07 formed in the vertical part 06 of the gas passage 04, and the cylinder 08 incorporating the ball valve 09 as an overflow prevention mechanism is installed on the inlet side of the closure 05 (vertical part 0
・It is composed of 6).

As mentioned above, in the conventional gas cock with the overflow prevention 1F mechanism, the cylinder 08 is a gas vent! The ball valve 09 is built into the vertical part 06 of the cylinder 0804, and when there is excessive outflow, the ball valve 09 floats upward in the cylinder 08 and closes the valve seat 010.
When the overflow ends, the ball valve 09 separates from the valve seat O1O due to its own weight, descends inside the cylinder 08, and falls to the stopper bottle 011.

In this way, the ball valve 09 is on the stop pin 011 due to its own weight, and because it is configured so that it floats only when there is excessive outflow, when the cylinder 08 becomes horizontal, the position of the ball valve 09 is not determined and the operation is disabled. There is a problem with instability.

Therefore, in conventional gas cocks, the cylinder is always designed to be installed vertically, but depending on the gas cock, the gas passage 04 may be horizontal, and there is a problem that an overflow prevention mechanism cannot be installed in such gas cocks. There is.

・Purpose of the present invention The present invention has been proposed in view of the above-mentioned problems, and it is possible to maintain stable operation without losing the overflow prevention function even if the cylinder and ball valve are installed not only vertically but also horizontally, diagonally up and down, or in a downward direction. The purpose is to propose a gas cock with an overflow prevention mechanism.

・Structure of the present invention In order to achieve the above object, the present invention is a gas cock with an overflow prevention mechanism, in which the ball valve in the cylinder is held in a fixed position by holding it with a stretchable elastic body, and the overflow is prevented. When this happens, the elastic body expands to enable the ball valve to operate, and the ball valve, which is held in place by the elastic body, always operates stably.

Embodiment FIG. 1 shows an embodiment of the present invention, in which 1 is a gas cock body, 2 is a gas passage formed in this body 1, and an inlet 3 of this gas passage 2 is located on the side, The hose end 4 is configured to face downward. Reference numeral 5 denotes a closure incorporated in a tapered portion 2a formed in the gas passage 2, and this closure 5
can be opened and closed by a handle 6.

7 is inside the gas passage 2 and is on the upstream side (
The details of this overflow prevention mechanism are as shown in FIG. 3.

In FIG. 3, reference numeral 8 indicates a cylindrical cylinder, and an external thread 9 for assembling is cut on the outer periphery of the distal end side of the cylinder 8, and is screwed into a fixing screw 2b in the gas passage 2.

lO is a valve seat formed on the tip side in the cylinder 8, 11
is a guide with a four-part structure built into the cylinder 8, and a ball valve 12 is built into this guide 11.

13 is a screw 14 inserted into the hole 15 of the cylinder 8 in order to hold the ball valve 12 when the ball valve 12 is assembled into the guide 11.
The through hole 1 of the ball valve 12 is installed in the guide 11 by using a spring as an elastic elastic body whose both ends are fixed by a spring.
A spring 13 passes through 2a to hold the ball valve 12.

In the figure, 16 is an O-ring, 17 is a guide 11, and a cylinder 8.
This is a stopper to keep it inside.

Note that the guide 11 is not essential in the cylinder 8, and the ball valve 12 may be directly held in the cylinder 8 by the spring 13 without a guide, as shown in FIG.

The overflow prevention mechanism having the above structure is installed horizontally within the gas passage 2 as shown in FIG. and,
When there is excessive outflow, a large pressure difference occurs before and after the ball valve 12, and when the balance between this pressure difference and the elastic force of the spring 13 is broken, the ball valve 12 overcomes the force of the spring 13 and expands. Then, it comes into close contact with the valve seat 10 and stops the flow of gas. This state is shown in Figure 2, where the gas is completely stopped and does not flow to the hose end (gas appliance side). As a result, gas accidents can be prevented when the rubber tube comes off.

FIG. 5 shows an embodiment in which the overflow prevention mechanism shown in FIG. 3 is installed vertically in a vertical gas passage, and the present invention does not lose its function whether it is installed horizontally or vertically. . In addition, the ball valve 12 is connected to the guide 11 (cylinder 8
), so even if the cylinder 8 is facing downward, its function is not lost, and the overflow prevention mechanism 1 is established as a mechanism that is stable in all directions.

In the embodiment, a coiled spring was chosen as the elastic body, but other springs may be used as long as they have the same properties.

・Effects of the present invention As described above, the present invention holds the ball valve in the cylinder with an elastic elastic body, so the ball valve is always in a predetermined position, and the cylinder can be oriented in any direction and incorporated into the gas cock. However, it does not lose its functionality.

Therefore, the overflow prevention mechanism can be incorporated into a gas cock having a horizontal gas passage, and since the ball valve is always in a fixed position, the operation is stable.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a gas cock according to the present invention, Fig. 2 is a sectional view of the overflow prevention 1 in a state where the mechanism is activated, Fig. 3 is an exploded perspective view of the overflow prevention 11-mechanism, and Fig. 4 is a sectional view of the gas cock according to the present invention. Overflow prevention 11=
A cross-sectional view showing another embodiment of the mechanism, FIG. 5 is a cross-sectional view of a gas cock in which the overflow prevention 11-mechanism according to the present invention is vertically incorporated, and FIG. 6 is a cross-section of a conventional gas cock with an overflow prevention mechanism. It is a diagram. 1... Gas cock, 2... Gas passage,
5... Closure, 8... Cylinder, 11
...Guide, 12...Ball valve, 13...
····spring.

Claims (1)

[Claims] A gas cock with an overflow prevention mechanism that holds the ball valve inside the cylinder with an elastic body.