JPH08326942A - Valve body for opening valve - Google Patents

Abstract

PURPOSE: To attain weight reduction and price reduction of a valve body used for an opening valve. CONSTITUTION: This valve body of an opening valve is clevatably provided on the communication opening part 5 between a primary side flow passage 2 and a secondary side flow passage 3, constituted capably of being pushed down for blockading the communication opening part 5 by fluid pressure introduced in a pressure chamber 14 formed on the upper side, and a valve body main body 8 is made of an elastic body with core material 10 buried therein.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a valve element for a release valve provided in a fire extinguishing water piping path in a sprinkler fire extinguishing facility.

[0002]

2. Description of the Related Art Conventionally, in this kind of open valve, a valve element is provided so as to be able to move up and down so as to open and close a communication opening between the primary side flow path and the secondary side flow path. For that, gun metal that does not generate rust is used.

[0003]

However, when a valve body made of gun metal is used as the above-mentioned conventional one, there is a drawback that the cost is very high, and the weight of the open valve itself is increased to handle the valve. There was a problem that made it complicated.

Further, in this case, since the rubber diaphragm is attached to the upper edge of the valve body so that the valve body can be moved up and down, the number of parts is increased. It was.

Therefore, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to reduce the weight and cost of a valve element used for an opening valve.

[0006]

That is, the means adopted by the present invention in order to solve the above-mentioned problems is provided in a communication opening 5 between the primary side flow passage 2 and the secondary side flow passage 3 so as to be able to move up and down. In addition, the valve body 8 is a valve body for an open valve configured to be pushed down so as to close the communication opening 5 by the fluid pressure introduced into the pressure chamber 14 formed above. The point is that it consists of an embedded elastic body.

[0007]

Therefore, in the valve body having the above-mentioned structure, the fluid pressure is normally introduced into the pressure chamber 14 so that the valve body descends and the communication opening 5 is closed to cause, for example, a fire. When the fluid pressure decreases, the pressure in the primary side flow passage 2 increases due to the pressing force of the fluid such as fire extinguishing water, and the valve is opened. Will be leaked to.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a valve in which a primary side flow passage 2 and a secondary side flow passage 3 are horizontally formed, and a valve seat 4 is opened at a mutual communication position thereof to form a communication opening 5. A casing is shown, and an annular valve seat 6 is fitted on the inner wall of the valve seat 4.

The reference numeral 7 designates a valve element which faces the valve seat 4 and can be moved up and down above the valve seat 4, and a bottom portion 8c which closes the communication opening portion 5c.
The valve body 8 is made of rubber and has a tubular portion 8a formed upright on its outer peripheral edge and a flange portion 8b provided on the upper peripheral edge of the tubular portion 8a. A cylindrical metal plate 9 is fixed to the inner peripheral surface of the, and a cylindrical retainer 10 is fixed to the outer peripheral surface thereof, and a plurality of through holes 11 are formed in the bent portion 12 at the lower end thereof. And is embedded in the bottom portion 8c of the tubular portion 8a. Reference numeral 13 denotes a cover body mounted on the upper portion of the casing 1, and a tip of a collar portion 8b of the valve body 8 is sandwiched between the cover body 13 and the casing 1, and the valve body 8 and the cover body are covered. A pressure chamber 14 in the form of a compartment is formed between the chambers 13.
Reference numeral 15 denotes a control port formed in the cover body 13, which is connected to a sensing head (not shown) separately provided outside via a pipe 16.

Reference numeral 17 is a through hole 18 provided in the bottom portion 8c of the valve body 8.
An orifice body 21 having a threaded portion 19 at the lower end and a collar portion 20 provided above the orifice body 21 and a hollow body screwed into the threaded portion 19 from the lower side of the valve body 8 The check bolt 22 is shaped like a check bolt, and a through hole 23 is formed in the center of the bottom surface of the check bolt 22. 24 is the orifice
A spherical ball housed in 17, 25 is the orifice body 21
2 shows a ball seat made of polyurethane or the like which is interposed between the bottom surface of the and the check bolt 22. An orifice pin 26 is provided between the inner peripheral walls of the orifice body 21 and prevents the ball 24 from rising above a certain level. 27 is a flange portion 20 of the orifice body 21
The communication hole is formed so as to oppose to the.

Reference numeral 28 designates a cylindrical guide sleeve press-fitted into a through hole 29 formed in the central portion of the cover body 13, and the upper end portion of the orifice body 21 is slidably fitted in the lower end portion thereof, and the upper end portion thereof is slidably fitted. A spindle 31 screwed into a screw portion 30 formed on the upper side of the through hole 29 is slidably fitted in the portion. 32 always urges the valve body 7 downward,
A spring arranged between the bottom portion 8c of the valve body 8 and the cover body 13 is shown. 33 is an O-ring for sealing, 34 is a cover body 13
The cap is detachably fitted to the convex portion 35 of the.

The open valve according to the present embodiment has the above-mentioned structure, and the open valve is used, for example, provided at an intermediate position of the pipe portion leading to the sprinkler head. That is, the primary side flow passage 2 is connected to a primary pipe in which air pressure for introducing fire extinguishing water is introduced, and the secondary side flow passage 3 is connected to a secondary pipe communicating with the sprinkler head.

First, a part of the air pressure supplied to the primary side flow path 2 passes through the through hole 23 of the check bolt 22 and the orifice body.
The valve body 7 flows into the pressure chamber 14 through the communication hole 27 of 21 and is pressed downward by the fluid pressure in the pressure chamber 14 and the pressing force of the spring 32, whereby the valve is reliably closed. Be seen.

When a sensing head separately connected to the pressure chamber 14 senses a fire, the air pressure inside the pressure chamber 14 is controlled by the control port.
15 is exhausted to the outside through the pipe 16 and the pressing force of the valve body is reduced. The valve body 7 is lifted against the pressing force of the spring 32 to open the valve, and the primary side flow path 2 Fire extinguishing water simultaneously flows out from the side to the secondary side flow path 3.

In this case, since the valve body 7 made of rubber is lightweight, there is an advantage that the valve opening operation can be performed quickly.

Further, after the valve is opened, the water supply is stopped and the opening valve is returned to the original initial state of valve closing for use. Since it is embedded, the strength of the valve body 8 is secured, and the valve body 8 is prevented from being unduly expanded. Therefore, it is possible to sufficiently apply the pressing force and the valve opening / closing operation for a long period of time. It is durable enough to endure.

Moreover, a plurality of through holes formed in the core material 10
Since the rubber constituting the valve body 8 is filled inside 11 and the two are integrated, the core material 10 does not inadvertently detach and cause damage. Is collar part 8c
Since it is integrally formed, the number of parts can be reduced.

The specific shape of the core material 10 embedded in the valve body 8 is not limited to the above embodiment, and the core material 10 having the through hole 11 as shown in FIG. The body 8 may be embedded from the tubular portion 8a to the bottom portion 8c, and the tip portion thereof may be exposed on the upper surface of the bottom portion 8c. in this case,
The tip portion of the core material 10 comes into contact with the flange portion 20 of the orifice body 21, and the valve body 8 is protected.

Further, the material of the valve body 8 does not necessarily have to be made of rubber, and any material having elasticity can be arbitrarily modified within the scope intended by the present invention.

Further, the open valve to which the valve body 7 according to the present invention can be applied is not limited to the open valve having the structure as in the above-mentioned embodiment, but can be widely applied to other open valves.

[0022]

As described above, since the valve body according to the present invention is composed of the elastic body in which the core material is embedded, the strength of the valve body is ensured and the valve body is unduly expanded. Has been stopped, and it has come to obtain a special effect that it can withstand long-term use.

Further, compared with the conventional valve body made of gun metal, the manufacturing cost thereof can be greatly reduced, and the weight of the open valve can be greatly contributed.

Moreover, the weight reduction allows the valve opening operation to be performed more quickly than the conventional one, and has a unique effect that the responsiveness can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing another embodiment.

[Explanation of symbols]

 2 ... Primary side flow path 3 ... Secondary side flow path 5 ... Communication opening 8 ... Valve body 8a ... Cylindrical part 8b ... Collar part 10 ... Core material 11 ... Through hole 14 ... Pressure chamber

Claims (3)

[Claims] 1. A pressure chamber (14) that is vertically movable in a communication opening (5) between a primary side flow passage (2) and a secondary side flow passage (3) and that is introduced upward. The communication opening by fluid pressure
A valve body for an open valve configured to be pushed down so as to close (5), wherein the valve body (8) is made of an elastic body in which a core material (10) is embedded. A valve body for a valve. 2. The valve body (8) is made of rubber and the core (10) is provided with a plurality of through holes (11).
A valve element for the open valve described. 3. The valve body (8) comprises a bottom portion (8c) for closing the communication opening (5) and a tubular portion (8a) formed upright on the periphery of the bottom portion (8c). And a flange portion (8b) provided on the upper peripheral edge of the tubular portion (8a), and the valve body (8) can be attached to the open valve through the flange portion (8c). The valve body for a release valve according to claim 1 or 2, wherein the core member (10) is provided in a manner extending from the tubular portion (8a) to the bottom portion (8c).