JPS61274179A - Automatic pressure-regulating valve - Google Patents

Abstract

PURPOSE:To stabilize a pressure-regulating function and to facilitate closing a hot water passage and a water passage by retaining a hot water valve element and a water valve element by regulating means and providing two closing mechanisms for bringing the respective valve elements into contact with valve seats from outside. CONSTITUTION:Regulating means 22 comprises springs 23, 24 disposed between a piston 20 and hot water and water valve elements 15, 17 in such a manner s to urge the valve elements 15, 17 to be separated from the corresponding valve seats 16, 18 and snap rings 25, 26 disposed on a shaft 21. A hot water passage 13 and a water passage 14 are respectively provided with a hot water stop screw 28 and a water stop screw 29 as a closing mechanism 27 adapted to bring the respective valve elements 15, 17 close to the valve seats 16, 18 from the outside to close the passages.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an automatic pressure regulating valve that is provided immediately before a hot water mixing device or the like used for hot water supply and equalizes the supply pressures of hot water and water.

2. Description of the Related Art Conventionally, this type of automatic pressure regulating valve has been known as shown in FIG.

In FIG. 2, a cylinder 2 is attached to the main body 1, and a hot water side valve seat 3 and a water side valve opening 4 are formed at the open end of the cylinder 2, and a disk-shaped hot water side valve body 5 and a water side valve are formed. A valve main body 8 having a valve shaft 7 in the body 6 corresponds to the hot water side valve seat 3 and the water side valve seat 4 from the outside of the cylinder 2, respectively, and the valve shaft 7 extends into the cylinder 2 and slides into the cylinder 2. A screw 10 is screwed to a disc-shaped pressure receiving member 9 that is movably inserted, and the hot water side valve body 5 and the pressure receiving member 9 are connected to each other.
The water chamber 11 is between the water chamber 11 and the water chamber 1 is between the water side valve body 6 and the pressure receiving member 9.
2. One valve body (
5 or 6) approaches its corresponding valve seat (3 or 4), the other valve body (5 or 6) moves away from its corresponding valve seat (3 or 4), and hot water is supplied. It always equalizes the pressure. (For example, Japanese Unexamined Patent Publication No. 56-90175) Problems to be Solved by the Invention However, the above configuration only equalizes the supply pressure, but does not have the function of opening and closing the flow path, and is integrated with the mixing valve. In this case, another valve must be provided to stop the hot water and water in the event of a failure of the mixing valve section, resulting in a very large structure.

The present invention solves these conventional problems by providing a compact and inexpensive automatic pressure regulating valve with a closing function, which has a stable pressure regulation function and can also easily close the hot water flow path and water flow path. The purpose is to provide.

Means for Solving the Problems In order to solve the above problems, the automatic pressure regulating valve of the present invention has the following features:
A hot water flow path and a water flow path, a hot water side valve body that reduces the primary pressure of these two flow paths, a hot water side valve seat, a water side valve body, and a water side valve seat;
A cylinder, a piston that slides inside the cylinder, a shaft fixed to the piston, and the hot water side valve body and the water side de body are mounted facing each other on the shaft with the valve seats corresponding to the piston in between. The valve body is held by a regulating means, and has two closing mechanisms that bring the valve body into contact with the valve seat from the outside to close the flow path.

According to the above configuration, when one valve body (hot water side or water side) approaches the corresponding valve seat, the other valve body (hot water side or water side) approaches the corresponding valve seat due to the sliding of the piston due to fluctuations in the balance of secondary pressure between the vortex flow path and the water flow path. The valve bodies (water side or hot water side) move away from their corresponding valve seats, and by pushing in the two closing mechanisms, the corresponding valve bodies approach their respective valve seats. and closes each flow path.

EXAMPLE Hereinafter, an example of the present invention is shown in FIG. 1, and will be explained based on this example. In FIG. 1, the vortex channel 13 and the water channel 14
The hot water side valve body 15, the hot water side valve seat 16, the water side valve body 17, the water side valve seat 18, the cylinder 19, and the inside of this cylinder 19, which reduce the primary pressure of these two flow paths 13 and 14. There is a sliding piston 2°0 and a shaft 21 fixed to this piston 20, and the two valve seats 16 and 18 are connected to the cylinder 19.
The opening is chamfered. The hot water side valve body 15 and the water side valve body 17 are slidable on the shaft 21,
It is regulated by a regulating means 22.

This regulating means 22 includes a piston 20 and a valve body 15.1, respectively.
7, from the corresponding valve seats 16, 18 to the valve body 15,
Spring 23.2 provided to bias 17 in the direction of separation.
4 and stop shafts 25 and 26 provided on the shaft 21. A stop screw 2 on the hot water side serves as a closing mechanism 27 for closing the flow paths by bringing the valve bodies 15 and 17 closer to the valve seats 16 and 18 from the outside in the vortex flow path 13 and the water flow path 14, respectively.
8 and a water side stop screw 29 are provided, and when these two stop screws 2B and 29 are tightened, the corresponding valve bodies 15 and 1 are provided, respectively.
7 is configured to be closed by approaching the valve seats I6 and 17 against the springs 23 and 241.

The two stop screws 28 and 29 of the closing mechanism 27 are configured to guide the shaft 21 so as not to cause play when the piston 20 and the valve bodies 15 and 17 slide.
A stable pressure regulation function can be maintained, and the hot water side valve body 15 and the water side valve body 17 are made of rubber 30°31 at the parts that contact the corresponding valve seats 16 and 1B, so they can be closed reliably. It also has the effect of absorbing sound caused by self-excited vibration.

Effects of the Invention As described above, the automatic pressure regulating valve of the present invention provides the following effects.

(1) The hot water flow path and the water flow path can be closed by operating the closing mechanism, so if it is integrated with a mixing valve, etc., the hot water or water source can be shut off due to a failure of the mixing valve. This is easy to do, and compared to installing two water shutoff valves,
It has a compact shape and is inexpensive.

(2) Two closing mechanisms close the flow path on the hot water side.

The water side can be operated independently, so if you want to discharge only hot water or water, you can close the other flow path.
A large flow rate can be obtained without unnecessarily reducing the pressure in the flow path on the discharge side.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an automatic pressure regulating valve according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional automatic pressure regulating valve. 13...Hot water flow path, 14...Water flow path, 1
5... Hot water side valve body, 16... Hot water side valve seat,
17...Water side valve body, 18...Water side valve seat, 19...Cylinder, 20...Piston, 21...Shaft , 22... regulatory means, 27.
... Closing mechanism.

Claims (4)

[Claims] (1) A hot water flow path and a water flow path, a hot water side valve body that reduces the primary pressure of these two flow paths, a hot water side valve seat, a water side valve body, a water side valve seat, a cylinder, and the inside of this cylinder. A piston on which the piston slides, a shaft fixed to the piston, and the hot water side valve body and the water side valve body are mounted facing each other on the shaft with the valve seats corresponding to the piston in between, and are held by a regulating means. This automatic pressure regulating valve is equipped with two closing mechanisms, each of which brings the valve body into contact with the valve seat from the outside to close the flow path. (2) The automatic pressure regulating valve according to claim 1, wherein the regulating means includes a spring provided between the piston, the hot water side valve body, and the water side valve body, respectively, and a retaining ring provided on the shaft. (3) The automatic pressure regulating valve according to claim 1, wherein at least one of the two closing mechanisms also serves as a shaft guide. (4) The automatic pressure regulating valve according to claim 1, wherein the hot water side valve body and the water side valve body are made of rubber at the portions that contact the corresponding valve seats.