JPS6215575Y2 - - Google Patents

Description

[Detailed description of the invention] The excessive outflow prevention valve of the invention, in particular, the inflow into the hose end from below or above, sideways (horizontal direction)
The present invention relates to an overflow prevention valve that is used in a gas tank installed in a gas tank and is inserted horizontally into the hose end.

The overflow prevention valve as mentioned above was already put into operation in 1972.
-132465 is known, but this one has a configuration as shown in Figure 1, and the main body 1 of the overflow prevention valve.
One open part of the valve seat port 1 is used as the valve seat port 1, and a ball valve 2 is located in the open part on the upstream side.
In this case, in the normal state, the ball valve 2 is positioned as described above, and when the overflow state occurs, the ball valve 2 is located at the valve seat opening 11.
It gets stuck in and shuts off immediately.

However, with the above-mentioned horizontally installed overflow prevention valve,
The upstream open end is extremely large compared to the diameter of the valve seat port 11, and cannot be inserted into the plug (hose end) of the gas pipe connector as it is. When the upstream open end is made smaller in diameter and inserted into the plug, the head difference between the valve seat port 11 of the overflow prevention valve and the ball valve 2 located at the upstream open end is reduced,
The specified operating flow rate cannot be obtained.

In order to ensure that the operating flow rate of the overflow prevention valve inserted into the horizontal plug is sufficient, the present invention makes it possible to set the above-mentioned head to a large value in the normal state, and also makes it possible to increase the flow rate of the overflow prevention valve in the same state. The objective is to increase the area of the gas passage section on the outer periphery.

The technical means of the present invention for solving the above problems is to provide a gas tank equipped with a gas circuit consisting of a combination of a horizontal flow path coaxial with the hose end and a vertical flow path continuing upstream from the horizontal flow path. In the gas tank equipped with an overflow prevention valve of the type in which the overflow prevention valve is inserted into the horizontal flow path, the upstream end open portion of the main body 1 is placed inside the hose end 4 or at the upstream end of the horizontal flow path 41 following this. The cylindrical ball valve receiving portion 7 formed following the upstream end open portion is located at the bending point from the vertical flow path to the horizontal flow path 41 in the vertical direction, and the ball valve receiving portion 7 is It is composed of a group of support rods connected to the main body 1, and the group of support rods are arranged so as to provide a plurality of gas inflow portions in the circumferential direction and the axial direction, and further, the lowermost side of the ball valve receiving portion 7 The pair of support rods 72 and 73 are opposed to each other with an interval slightly smaller than the diameter of the ball valve 2.

The above technical means of the present invention operates as follows.

In the normal state, the ball valve housed in the main body of the overflow prevention valve is supported by a pair of support rods located at the lowest position of the ball valve receiving part, and at this time, the ball valve is , eccentricity by a predetermined amount (having a head difference)
in position. In this state, the ball valve receiving part is composed of a group of support rods, so the gas passing through the vertical flow path is
It flows into the main body from the entire area around the side and upper part of the ball valve, and reaches the outlet of the plug from the valve seat opening.

In this state, the amount of eccentricity of the ball valve from the valve seat opening, that is, the above-mentioned head, becomes larger than that of the conventional valve, and the area of the gas flow portion on the outer periphery of the ball valve in the normal state also becomes larger.

When an overflow condition occurs, the ball valve is lifted up by the gas flow, moves horizontally, and fits into the valve seat opening, thereby urgently cutting off the gas circuit.

Since the present invention has the above configuration, it has the following unique effects.

Under normal conditions, the amount of eccentricity from the valve seat opening of the ball valve, that is, the head as mentioned above, is larger than that of the conventional one, and the area of the gas flow area around the outer periphery of the ball valve under normal conditions is also larger. Therefore, the operating weight can be set larger. In other words, there is an advantage that pressure loss is reduced.

Hereinafter, details of embodiments of the present invention will be explained based on the drawings.

In this embodiment, the ball valve 2 can be reset by the shaft 31 provided in the socket 3 of the gas pipe connector, and for this purpose, the main body 1 has a plug 4 as a hose end or a plug 4 connected thereto. It has a length that spans the entire horizontal flow path 41 provided across the Kotoku body 5, and a valve seat opening 11 is formed in the middle thereof, and a valve seat is formed midway between the downstream open end 12 and the valve seat opening. A pair of leaf springs 6, 6 bent inward toward the valve seat opening 11 are provided, the free ends of which are opposite to and close to the valve seat opening 11, and the other ends are attached and fixed to the inner wall of the main body 1. There is.

When the socket 3 is connected, the leaf springs 6, 6 are pushed apart by the shaft 31 and their tips move toward the periphery of the valve seat opening 11. Conversely, when the socket 3 is removed, the shaft 31 moves back. When the leaf springs 6, 6 are restored to their initial positions and returned to the center side of the valve seat port 11, and the ball valve 2 is fitted into the valve seat port 11, the ball is removed by the return movement of the leaf springs. Valve 2 is pushed upstream and returns to its initial position.

Next, the part that accommodates the ball valve 2 will be described in detail. In this embodiment, the ball valve receiving part 7 is constructed separately from the main body 1 and is fitted into the upstream end of the main body 1. As shown in FIG. 3, this ball valve receiving part has three support rods 71, 72, 73 protruding from a ring-shaped member 74 constituting the fitting part on the same diameter as the main body 1 and parallel to the axis of the main body. , the bending pieces 71a, 72a, 73a on the tip side are arranged in a radial manner, and the distance between the ring-shaped member 71 and the bending pieces is made to substantially correspond to the diameter of the ball valve 2, and the bending pieces 71a, 72a, 73a are arranged at the lowest position. The distance between the pair of support rods 72 and 73 is set to be slightly smaller than the diameter of the ball valve 2, and thereby the functions and effects described above can be obtained.

Although the support rods 71, 72, and 73 in this embodiment are configured to be parallel to the axis of the main body, it is also possible to combine arc-shaped support rods or diagonal support rods, and it is also possible to increase or decrease the number of support rods. Needless to say, it is.

Usually, a gas tank is provided above or below the horizontal flow path 41, and the tank main body including the gas tank is housed in a box and used as a wall-embedded box tank. Alternatively, the overflow prevention valve of the present invention can be used by being incorporated into an existing gas tank of the above type. Therefore, as an airtight means for the outer periphery of the main body 1, means such as an adhesive, a sealant, a press-fit seal, etc. can be adopted.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional example, Fig. 2 is an explanatory diagram of an embodiment of the present invention, and Fig. 3 is a perspective view of a ball valve receiving part. , 4...Plug, 5...
...Kotuku body, 7... Ball valve receiver, 11... Valve seat opening, 71, 72, 73... Support rod.

Claims (1)

[Scope of utility model registration request] A gas tank equipped with a gas circuit consisting of a horizontal flow path coaxial with a hose end and a vertical flow path in the vertical direction continuing upstream of the horizontal flow path, and in which an overflow prevention valve is inserted into the horizontal flow path. In a gas tank equipped with an overflow prevention valve, the upstream end open portion of the main body 1 is inserted into the hose end 4 or the horizontal flow path 4 following this.
A cylindrical ball valve receiving part 7, which is located at the upstream end of 1 and formed following the upstream end open part, is located at the bending point from the vertical flow path to the horizontal flow path 41, and the ball valve The receiving part 7 is composed of a group of support rods connected to the main body 1, and the support rod groups are arranged so as to have a plurality of gas inflow parts in the circumferential direction and the axial direction,
Furthermore, a pair of support rods 7 on the lowest side of the ball valve receiving part 7
2 and 73 facing each other at an interval slightly smaller than the diameter of the ball valve 2.