JPS622078A - Automatic pressure regulating valve - Google Patents

Abstract

PURPOSE:To eliminate forcibly the adhesion of scale and the clogging of dirt by providing vanes which turn a hot water side valve body, a water side valve body and a piston in the same direction by the flow through respective flow passages. CONSTITUTION:A automatic pressure regulating valve contains a hot water side valve body 15, a hot water side valve seat 16 and a water side valve body 17, a water side valve seat 18 which reduce the primary pressure in a hot water flow passage 13 and a water flow passage 14, and the two valve seats 16 and 18 are formed by chamfering the both ends of a cylinder 19. Vanes 22 and 23 are provided on the hot water side valve body 15 and the water side valve body 17, and the two valve bodies 15, 17 and a piston 20 are turned in the same direction by the flow through respective flow passages. Thus, the adhesion of scale, the clogging of dirt and the like on the sliding surfaces can be forcibly eliminated.

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. (For example, Japanese Unexamined Patent Publication No. 56-90175) In FIG. 2, a cylinder 2 is attached to a main body 1, and a hot water side valve seat 3 and a water side valve seat 4 are formed at the open end of the cylinder 2. The valve body 8 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 has a valve shaft 7 on the hot water side valve body 5 and the water side valve body 6. extends into the cylinder 2 and is screwed 1o to a disk-shaped pressure receiving member 9 slidably inserted into the cylinder 2, and the hot water side valve body 5 and the pressure receiving member 9 are screwed together.
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 (
When S or 6) approaches the corresponding valve seat (3 or 4), the other valve body (5-straddle 6) moves away from the corresponding valve seat (a or 4), and the hot water This ensures that the supply pressure is always equal.

Problems to be Solved by the Invention However, with the above configuration, there is a possibility that dust, scale, etc. may adhere to the small gap between the cylinder 2 and the sliding pressure receiving member 9, and the pressure regulating function is significantly impaired. There is a risk that it will decrease. In addition, rattling is likely to occur in the radial direction with the pressure receiving member 9 as a fulcrum, and the rattling prevents smooth sliding and tends to deteriorate functionality.
Even if the width of the pressure receiving member 9 is made large so that it can be guided, the contact area with the cylinder 2 is increased, which not only increases the sliding frictional resistance but also increases the weight of the sliding part including the valve body 9. As the pressure becomes larger, it becomes impossible to respond to minute pressure imbalances, and as a result, the temperature of the mixed water discharged from the hot water mixing device behind the automatic pressure regulating valve fluctuates.

The present invention is intended to solve such conventional problems, and aims to provide an inexpensive automatic pressure regulating valve that is resistant to scale adhesion, dust clogging, etc., and has excellent durability and reliability.

Means for Solving the Problems In order to solve the above problems, the automatic pressure regulating valve of the present invention has a hot water flow path, a water flow path, a hot water side valve body that reduces the primary pressure of these two flow paths, and a hot water flow path. A side valve seat, a water side valve body, a water side valve seat, a cylinder, a piston that slides within this cylinder, a shaft fixed to this piston, a guide means for eliminating wobbling of the shaft, and the hot water side valve. The body and water side valve body are fixed opposite to the shaft with the piston in between, and vanes are mounted on the shaft to rotate the hot water side valve body, the water side valve body, and the piston in the same direction by the flow of the flow path. It is set up in

According to the above-described configuration, when one valve body approaches its corresponding valve seat, the other valve body moves away from its corresponding valve seat due to fluctuations in the secondary pressure balance between the intestines and water. It performs an inversely proportional opening/closing operation by moving, and always equalizes the secondary pressure of hot water and water.By rotating the hot water side valve body, water side valve body, and piston using vanes installed on the shaft, the scale It forcibly eliminates adhesion and dirt clogging, and provides stable pressure regulation function.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings. In FIG. 1, the automatic pressure regulating valve of this embodiment is shown in the hot water flow path 13.
and a hot water side valve body 15 for reducing the primary pressure of the water flow path 14, a hot water side valve seat 16, a water side valve body 17, and a water side valve seat 18. 19 with chamfered ends. Further, a piston 20 that slides within the cylinder 19, and a piston 20 that is fixed to the piston 20,
It is composed of a shaft 21 that supports the hot water side valve body 15 and the water side valve body 17, and the hot water side valve body 15 and the water side valve body 17 are provided with blades 2.
2.23 is provided so that the two valve bodies 15.17 and the piston 20 each turn in the same direction due to the flow of the flow path, and the vanes 22.23
It is also a guide means to eliminate the fluctuation of color. The hot water side valve body 15 and the water side valve body 17 are configured to have a diameter smaller than the inner diameter of the cylinder 19 and equal to the piston 20.

With the above configuration, the primary pressure of hot water and water is offset between the valve body 15 (17) and the piston 20, and fluctuations in the secondary pressure balance after pressure reduction are compensated for by one valve body (16 17) approaches its corresponding valve seat (16 or 18), the other valve body (17 or 15) moves in a direction away from its corresponding valve seat (18 or 16). This is to always equalize the secondary pressure of hot water and water.

The effect of this embodiment is that the two valve bodies 15,17 and the piston 20 are rotated within the cylinder 16 by the vanes 22.23 provided on the two valve bodies 15, 17, thereby improving the sliding surface. Scale adhesion, dust clogging, etc. are forcibly removed, and since the blades 22 and 23 are also guide means for eliminating wobbling of the ° axis 21≦4, a stable pressure regulating function can be obtained.

Since the diameters of the two valve bodies 15 and 17 are smaller than the inner diameter of the cylinder 19, there are advantages such as ease of assembly and maintenance.

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

(1) The blades installed on the shaft allow the hot water side valve body, water side valve body,
By rotating the piston with the flow, scale adhesion and dirt clogging are forcibly removed, leading to improved durability and reliability.

(2) The two valve bodies and the piston rotate due to the blades installed on the shaft, creating an alignment effect on the cylinder.In other words, the contact area with the cylinder is reduced and sliding resistance is reduced, resulting in pressure regulation. Improved functionality.

[Brief explanation of drawings]

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, 22.23...Blade,
＆邊・・・Guiding means.

Claims (5)

[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 for sliding, a shaft fixed to the piston, a guide means for eliminating wobbling of the shaft, and the hot water side valve body and the water side valve body sandwiching the piston and fixed opposite to the shaft, The automatic pressure regulating valve is provided with vanes on the shaft that rotate the hot water side valve body, the water side valve body, and the piston in the same direction according to the flow of the flow path. (2) The automatic pressure regulating valve according to claim 1, wherein the blade is integrally formed with the hot water side valve body and the water side valve body. (3) The automatic pressure regulating valve according to claim 1, wherein the vane also serves as a guide means. (4) The automatic pressure regulating valve according to claim 1, wherein the hot water side valve body and the water side valve body are formed smaller than the inner diameter of the cylinder. (5) The automatic pressure regulating valve according to claim 1, wherein the hot water side valve seat and the water side valve seat are configured by chamfering both ends of the cylinder.