JPS5810054Y2 - Overflow prevention valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an overflow prevention valve, and more particularly to an overflow prevention valve that delays the operating time of its body valve.

As this kind of overflow prevention valve, Utility Application No. 551379 has already been published.
No. 06 was proposed, but of this type, the frame 9 made of elastic wire is inserted into the main cylindrical part 3 of the overflow prevention valve (Fig. 1). side piece 11 of
．． The actuation time is delayed by providing a protrusion on the cylindrical part 12 and causing the body valve to collide with this protrusion.
It will be inscribed on the inner peripheral surface of.

However, although this type of delayed overflow prevention valve with a protrusion inside the cylinder has the advantage that assembly can be completed by simply fitting the frame into the cylinder, conversely, the height of the protrusion is extremely high. It has the disadvantage of being low.

This is because the operating flow rate is determined by the outer circumferential gap of the body valve, so in the case of high-calorie gas, the outer circumferential gap cannot be set large, and the gap between one protrusion and the other side piece is This is because it cannot be set larger than the diameter of the body valve.

Normally, the difference between the inner diameter of the cylinder and the outer diameter of the body valve is about 27/gIl, so the conventional protrusion described above must be set to one size or less, including the wire diameter of the side piece.

In a device in which the protrusion is produced by plastic (bending) processing of an elastic wire, if the effective height of the protrusion is low (less than twice the wire diameter), the wire cannot be bent sharply, and the protrusion becomes The oblique side portion is long and has a mountain-like shape with a small degree of inclination, and the degree of collision between the body valve and the protrusion is reduced.

That is, when the body valve rises and collides with the protrusion, it collides with the hypotenuse, and the direction change angle is small;
Depending on the collision, the upward movement speed of the body valve cannot be significantly reduced.

An object of the present invention is to enable the use of a frame body in which the protrusions of the side pieces protrude at approximately right angles.

The technical means of the present invention to solve the above problem is to cut a pair of grooves vertically on the inner circumferential surface of the cylindrical part, and install the side pieces of the frame by sinking them into these grooves. That's what happened.

According to the above technical means of the present invention, since the side piece is recessed into the vertical groove on the inner peripheral surface of the cylindrical part, the side piece does not protrude from the inner peripheral surface of the cylindrical part. , only the protrusion protrudes from the inner circumferential wall of the cylindrical portion.

Therefore, in the case of the above-mentioned normal overflow prevention valve, the height of the protrusion can be set to about 211 gl1, and the protrusion can be set to
It is possible to use one formed into a shape that projects laterally from the side piece at a substantially right angle.

Therefore, the protrusion height of the protrusion becomes large, and the direction change of the body valve after the collision described above is also large, and the deceleration effect of the body valve due to the collision is significantly improved.

The present invention has the following unique effects.

Since only the projections from the side pieces protrude into the cylindrical part of the overflow prevention valve, the advantage is that the gas flow resistance inside the cylindrical part can be reduced compared to a case where the side pieces are exposed on the inner peripheral surface of the cylindrical part. There is.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings shown in FIG. 2 and below.

In FIG. 2, the cylindrical main body cylindrical part 3 is constructed separately from the head A forming the valve seat opening 1, and has a hook-shaped part 7 connected to a tapered part of the valve seat opening 1. A hook-shaped portion 8 formed on one side of the cylindrical portion 3 is fitted into the cylindrical portion 3 and integrally connected, and the valve chamber flow path 4 within the cylindrical portion continues below the valve seat opening 1 (on the upstream side).

The body valve 2 is located in a U-shaped frame 9 made of an elastic wire that is inserted into the cylindrical part 3, and is held in a free state by a lower side part 10 that diametrically crosses the lower end of the cylindrical part 3. Ru.

Further, the side piece 11.12 of the frame body has a protrusion 13.13.
and 14 are provided in a protruding manner, and these are arranged in a staggered manner upward and downward, and the protruding amounts of the protruding portions 13 and 13 and 14 are set appropriately in advance.

Further, the side pieces 11.12 are fitted into grooves 15, 16 cut vertically in the inner circumferential wall of the cylindrical part 3, and bent ends 17.18 formed at the upper ends of the side pieces 11.12 , fit into the small holes 19 and 20 bored at the upper ends of the grooves 15 and 16,
As a result, the frame body 9 is fixed within the cylindrical portion 3.

The cylindrical portion 3 is formed by injection molding of synthetic resin with concave grooves 15 and 16.
It can be easily manufactured including.

In the case of the embodiment described above, when an overflow condition occurs, the gas flow rate from the outer circumferential gap of the body valve 2 increases rapidly and the body valve is lifted up.
14 while changing direction by a predetermined amount each time this contact occurs, the so-called operating time from the start of the rise of the body valve 2 until it fits into the valve seat opening 1 is extended. Become.

When a gas appliance equipped with a solenoid valve is connected to the downstream side of the overflow prevention valve, a pseudo overflow condition temporarily occurs due to sudden gas movement to the internal circuit of the appliance on the downstream side, and the body valve 2 If the operating time is short, there will be an inconvenience that the valve will fit into the valve seat port 1 in this pseudo-overflow state, but due to the above-mentioned extension effect, the gas circuit will be in a steady state by the time the valve seat port 1 is inserted. , and the above-mentioned inconvenience does not occur.

In addition, the above embodiment has a greatly simplified structure for extending the operating time of the body valve 2, and the body valve 2 can be moved into the cylinder by simply fitting the frame 9 into the cylinder part 3. It is held in a free state within the section 3, and no special work is required for protruding the protrusions 13, 13, 14 into the cylindrical section 3.

Next, since the side pieces 11 and 12 are housed in the grooves formed on the inner surface of the cylindrical part 3, the opening degree of the outer circumferential gap of the body valve 2 can be set to an extremely small value, and the effect of extending the operating time can be increased. The operating flow rate of the overflow prevention valve can be set accurately according to each gas type.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the conventional example, Fig. 2 is a sectional view of the embodiment of the present invention in use, and Fig. 3 is its bottom view.
... Valve seat opening, 2 ... Body valve, 3 ...
・Cylinder part, 9... Frame body, 10... Lower side part, 11, 12... Side piece, 15.16...
・Concave groove.

Claims (1)

[Scope of utility model registration request] The main cylinder portion of the overflow prevention valve is made of an elastic wire, and
A U-shaped frame body with protrusions arranged in a staggered manner is inserted into the side piece, and the bent end of the upper end of the side piece is locked to the upper end of the cylindrical part, and the frame body is installed inside the cylindrical part. , in which the body valve is held in a free state within the frame, a pair of grooves are vertically cut on the inner circumferential surface of the cylindrical part, and the side pieces of the frame are attached to these grooves. An overflow prevention valve installed by being submerged inside.