JP4251391B2 - Fluid valve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fluid valve for injecting and sealing a gas such as air or a fluid into a sealed bag body.
[0002]
[Prior art]
It is known that high-pressure air is injected into a flexible sealed bag body and inflated into a predetermined shape to be used as a substitute for a mold.
A part of this type of sealed bag body is equipped with a valve for injecting and sealing air.
[0003]
[Problems to be solved by the invention]
The above-described sealed bag valve has the following problems.
<B> Although the same type as a tire valve for automobiles is used, this type of valve is injected through a small passage while pushing the valve body open by air injection pressure, so the amount of air injection is small and injection is possible. It takes time, and the larger the sealed bag body, the worse the injection efficiency.
<B> It is conceivable to increase the amount of air injected by applying a large valve with a cap with a floating ring cap. However, this valve has a limit in pressure resistance due to its structure, and is not suitable for enclosing a high-pressure fluid. In addition, if the cap is removed, air may escape.
[0004]
OBJECT OF THE INVENTION
The present invention has been conceived in view of the above-described conventional problems, and provides a fluid valve that can improve injection efficiency and improve sealing performance at high pressure with a simple structure. With the goal.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a fluid valve of the present invention is a fluid valve attached to an inlet of a flexible sealing bag body for replacing a formwork having flexibility, and is provided at the inlet of the sealing bag body. A housing having a large passage formed therein, a plug body screwed to the housing and detachably provided, a replenishing passage formed therein, a check valve provided in the replenishing passage, and the housing The first check means and the second seal means arranged in series with the plug body, and the check valve is hingedly coupled to a valve seat formed at one end of the plug body and the replenishment path can be opened and closed. And the check valve closes the replenishment path by the pressure in the sealed bag body, and the first sealing means is a ring projecting obliquely downward from the inside of the housing. The flange piece is caused by the pressure inside the sealed bag In close contact with the small-diameter outer periphery of the body constitutes the second sealing means, an intermediate stepped portion formed on the outer periphery of the middle portion of the stopper is constructed in close contact with the stepped portion formed inside the housing Is.
[0006]
In the fluid valve, an auxiliary plug for closing the replenishment path is provided .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments according to the present invention will be described below with reference to the drawings.
[0008]
<I> Sealed bag (Figs. 2 and 6)
The sealing bag body 4 is a bag body such as an air tube or an air bag which is formed by laminating a flexible sheet such as vinyl chloride or rubber inside and outside.
The sealed bag body 4 has a substantially cylindrical shape in a state filled with air, and has a predetermined length.
An inlet 40 is opened above the sealing bag body 4, and the fluid valve 1 is attached to the inlet 40.
By injecting air into the sealing bag body 4, the sealing bag body 4 expands into a substantially cylindrical shape, and contracts flatly by discharging air.
[0009]
<B> Fluid valve (Figs. 1 and 2)
The fluid valve 1 includes a housing 10, a plug body 20, and an auxiliary plug body 30.
The housing 10 is a cylindrical body in which a large passage 11 having a large diameter is formed.
Below the housing 10, there is a joint 12 that joins the inlet 40 of the sealing bag 4 by welding or the like.
A step portion 13 is formed inside the housing 10, and a flexible annular flange piece 14 is provided so as to project obliquely downward (see FIGS. 2 and 4). A female screw 15 is cut above the stepped portion 13.
[0010]
The plug body 20 is a hollow structure body including a polygonal head portion 21, a cylindrical intermediate portion 22, and a small diameter portion 23, and a replenishment path 24 is formed therein.
A check valve 27 is provided in the replenishment path 24. In this example, the check valve 27 is provided at one end of the replenishment path 24, but may be provided in the middle of the replenishment path 24.
The check valve 27 is normally closed, but opens when the pressure in the replenishment path 24 increases. For example, the hinge is formed by closing one end of the small-diameter portion 23 and cutting the periphery of the closed end over a half circumference. It can be comprised by the shaped valve body 27a.
The cut surface of the small diameter portion 23 is a valve seat 27b, and the valve body 27a can be opened and closed with the hinge portion 27c as a fulcrum. Normally, the valve body 27a is closed by the air pressure P1 filled in the sealing bag body 4 (see FIG. 5A), and is released when the air pressure P2 in the replenishment path 24 becomes higher than the filling pressure P1 (FIG. 5B )reference).
Note that the reverse support valve 27 may have another structure.
A male screw 25 is engraved on the outside of the intermediate portion 22, and an intermediate step portion 26 is formed (see FIGS. 2 and 4).
[0011]
As can be seen from FIGS. 2 and 4, in the fluid valve 1, the flange piece 14 is in close contact with the outer periphery of the small diameter portion 23 to form the first sealing means, and the intermediate step portion 26 is in close contact with the step portion 13. The sealing means is configured.
In particular, the first sealing means is such that the flange piece 14 is displaced in a direction in close contact with the outer periphery of the small-diameter portion 23 by the air pressure sealed in the sealing bag body 4, so that the sealing performance is always maintained regardless of the magnitude of the air pressure. To do.
These first and second sealing means are arranged in series between the housing 10 and the plug body 20.
[0012]
The auxiliary plug 30 is a cap that closes the replenishment path 24 and is attached by being pushed into the replenishment path 24.
The auxiliary plug body 30 functions to prevent air from coming off and prevent foreign matter from entering.
The auxiliary plug 30 may be omitted.
[0013]
Next, the case where the sealing bag body 4 is installed in the expansion joint portion and air is injected from the fluid valve 1 will be described.
[0014]
<I> Installation of sealed bag (Fig. 6)
The molds 5 and 6 of the concrete structures 50 and 60 are installed with a predetermined space 7.
The width of the space portion 7 is a width that does not affect each other when the concrete structures 50 and 60 vibrate due to expansion / contraction due to temperature change or earthquake.
A plurality of air-filled sealing bag bodies 4 are suspended in the space 7 and arranged in a substantially vertical state, and the sealing bag bodies 4 and 4 are connected to each other by, for example, a string and supported in an adjacent state.
A fluid valve 1 is attached to the sealing bag body 4.
[0015]
<B> Air injection (Fig. 7)
Next, the plug 20 screwed into the housing 10 is loosened and removed, and the large passage 11 is opened.
Although not shown, air is injected from the large passage 11 with an appropriate compressor, air pump, or the like, and the sealed bag body 4 is expanded. Due to the large diameter large passage 11, air can be injected in a short time.
Since a plurality of sealed bag bodies 4 are installed, for example, an air pipe is connected to the large passage 11 of each sealed bag body 4, and air is successively supplied to the sealed bag bodies 4 while sequentially selecting with a selection switch of a compressor or an air pump. You may make it inject | pour.
[0016]
<C> Enclosed air (Figs. 2, 3, and 4)
When air is injected into the sealing bag body 4, the plug body 20 is inserted into the large passage 11 of the housing 10 (FIG. 3), the male screw 25 is screwed into the female screw 15, and the polygonal head 21 is screwed in while turning. .
The outer peripheral portion of the small diameter portion 23 comes into contact with the tip end portion of the flange piece 14 and is further screwed in until the intermediate step portion 26 is pressed against the step portion 13 while spreading the flange piece 14 from the inside to the outside (FIG. 4). Thereby, the air in the sealing bag body 4 is sealed.
In the state of FIG. 4, the flange piece 14 is in close contact with the outer periphery of the small diameter portion 23 (first sealing means), the intermediate step portion 26 is in close contact with the step portion 13 (second sealing means), and the sealed bag body. Even if the air enclosed in 4 has a high pressure, it does not leak.
The auxiliary plug 30 is pushed into the replenishment path 24 (FIG. 2).
When air escapes during screwing of the plug body 20, the air is replenished from the replenishment path 24 before the auxiliary plug body 30 is pushed in.
[0017]
<D> Replenishment of air (Figs. 5 and 8)
When a situation requiring replenishment of air occurs during construction, only the auxiliary stopper 30 is removed and air is injected from the replenishment path 24 to replenish.
When the air is replenished, air having a pressure P2 higher than the air pressure P1 in the sealed bag body 4 is injected.
The reverse support valve 27 closed as shown in FIG. 5A by the air pressure P1 in the sealing bag body 4 has a valve body 27a as shown in FIG. Is pushed open, so that air can be replenished.
After the air supply, the auxiliary plug 30 is pushed into the supply path 24.
[0018]
<E> Air discharge After the concrete 8 placed and cured is cured and hardened, the plug body 20 is removed to open the large passage 11, and the air in the sealed bag body 4 is exhausted and contracted.
The sealed bag body 4 in a contracted state is removed from the space 7 and repeatedly used while being diverted to another place.
[0019]
【The invention's effect】
Since the present invention has been described above, the following effects can be obtained.
<A> A simple structure in which a plug is detachably coupled to a housing. At the time of air injection, since the plug can be removed and air can be directly injected from a large passage having a large diameter, the injection amount is large, injection can be performed in a short time, and injection efficiency can be greatly improved.
<B> Since the sealing means is arranged in series between the housing and the plug, even if it is high-pressure air, it does not come out, and the sealing performance can be improved at high pressure.
<C> Since it has a check valve that is opened by the air pressure at the time of air replenishment, it can be easily replenished by simply removing the auxiliary plug when refilling air.
<D> Since the plug is screw-coupled to the housing, there is no problem that the plug is detached as in the prior art.
[Brief description of the drawings]
FIG. 1 is a perspective view of a fluid valve.
FIG. 2 is a cross-sectional view of a fluid valve.
FIG. 3 is an explanatory diagram of inserting a plug into the housing.
FIG. 4 is an explanatory diagram in which a plug is attached to a housing.
5A and 5B are diagrams showing a check valve, where FIG. 5A shows a closed state and FIG. 5B shows an open state.
FIG. 6 is an explanatory diagram when a sealed bag body to which a fluid valve is attached is used for an expansion joint part.
FIG. 7 is an explanatory view showing a state in which the fluid valve is opened and air is injected into the sealed bag body.
FIG. 8 is an explanatory view showing a state in which air is replenished to the sealed bag body.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Fluid valve 10 ... Housing 11 ... Large passage 13 ... Step part 14 ... Flange piece 15 ... Female screw 20 ... Plug body 22 ... Intermediate part 23 ... · Small diameter portion 24 ··· Replenishment path 25 · · · Male screw 26 · · · Intermediate step portion 27 · · · Check valve 4 · · · Sealing bag 40 · · · Injection port

Claims (2)

A fluid valve attached to an inlet of a sealed bag body for replacing a flexible formwork ,
A housing attached to the inlet of the sealed bag body and having a large passage formed therein,
A plug body that is detachably provided by screw coupling to the housing, and has a replenishment path formed therein,
A check valve provided in the replenishment path;
A first sealing means and a second sealing means arranged in series between the housing and the plug ,
The check valve comprises a valve seat formed at one end of a plug body, and a valve body provided by hinge-opening the replenishment path so as to be opened and closed,
The check valve is configured to close the refill path by the pressure in the sealed bag body,
The first sealing means is configured such that an annular flange piece projecting obliquely downward from the inside of the housing is in close contact with the outer periphery of the small-diameter portion of the plug body by the pressure in the sealed bag body ,
The second sealing means is configured such that the intermediate step formed on the outer periphery of the intermediate portion of the plug body is in close contact with the step formed on the inside of the housing .
Fluid valve. 2. The fluid valve according to claim 1 , further comprising an auxiliary plug that closes the replenishment path.

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