JPH0135032Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to preventing water hammer when switching valves in faucets equipped with a pair of plate valves made of ceramic and having water passage holes on the contact surfaces.

Conventionally, there is a faucet equipped with a pair of ceramic disc members, as shown in FIG. 1 of Japanese Patent Application Laid-open No. 134671/1984 (FIG. 5 of the drawings of the present application). To explain with reference to FIG. 5 above, a chamber 32 and a chamber 33 are provided inside the faucet 30, which are separated by a partition wall 31, and the chambers 32 and 33 communicate with each other through a valve seat 34. The disk member 35 on the fixed side is placed at the bottom and the disk member 36 on the movable side is placed at the top. , 40 are opened and closed.

In the case of the above-mentioned valve, since the valve port is opened and closed simply by rotating the valve stem, the impact caused by water hammer when the valve is opened and closed becomes very large. In other words, the size is incomparable to that of conventional screw-fed valves, and repeated impact may cause the valve function to become loose at an early stage, or cause significant damage to water pipes and joints that have deteriorated over time. There was an inconvenience that caused damage.

This invention solves the above problem and connects the chamber on the primary pressure side leading to the water pipe with the valve port of the faucet closed and the pressure adjustment case attached to the valve stem of the faucet to allow water to flow through the valve stem. The purpose is to significantly reduce water hammer when switching valves by providing constant communication through the holes.

The basic structure of this invention is faucets (single faucet,
The flow path of a mixed faucet, branch faucet, etc. (single faucet in this example) is divided into two by a partition wall into a chamber on the primary pressure side and a chamber on the secondary pressure side. It communicates with a socket opening upward at the top of the socket, and this socket has a fitting part where the outer periphery of the top is contracted in stages to fit a separate plug, and a separate valve stem is attached to the top. A valve case is formed in which a vertical hole to be inserted and a pair of detents for restricting the range of movement of a pin that is attached to the valve stem and prevents excessive rotation of the valve stem are recessed and have a substantially fan-shaped planar cross section. Inside the lower part of the case, there is a valve chamber that houses a pair of separate plate valves, a pair of packing and a bottom plate with a stopper for the valve case, and a separately provided valve stem passes through the water hole at the center of the shaft. With,
A screw hole for attaching a separate pressure adjustment housing to the upper end of the water passage hole, the pin protruding from its outer periphery, and a polygonal engagement portion coupled to the plate valve provided at the outer side of the lower end. The inside of the pressure adjustment housing is divided into two parts by a pressure adjustment plate to provide a pressure adjustment valve chamber and an air pressure chamber, and this pressure adjustment housing is connected to the valve stem and the entire pressure adjustment housing by a threaded portion on the bottom surface. The handle is configured to be integrally connected to the handle that wraps around the valve by means of threaded portions on the upper surface, and through the above connection, the water hole of the pressure adjustment case and the water hole of the pressure adjustment case are formed above and below the water hole of the valve stem. The water passage hole of the fixed plate valve is kept in constant communication. Further, the handle is made of synthetic resin and has an approximately inverted cup shape in cross section, and is formed so as to accommodate the pressure adjustment case therein.

Hereinafter, embodiments of this invention will be described in detail based on the drawings.

The embodiment of this invention is as shown in Fig. 1 and Fig. 2 A to F.
The flow path is divided into a chamber 3 on the primary pressure side and a chamber 4 on the discharge side by a partition wall 2, and these chambers 3 and 4 have a socket 5 opened upward at the top of the faucet 1 and an opening end. It communicates with the screw opening 6 through through holes 7 and 8. The valve case 9 has a fitting portion 11 whose upper outer periphery is contracted in stages to be fitted with a plug 10 (described later), a vertical hole 13 through which a valve stem 12 (described later) is inserted, and a vertical hole 13 through which the valve stem 12 (described later) is inserted. A detent 15 is provided to prevent rotation via a pin 14, and inside the lower part of the valve case 9 there are plate valves 16 and 17 (to be described later), packings 18 and 18 which are also cut in pairs, and the valve case. 9
A valve chamber 20 is formed in which a bottom plate 19 having a rotation stopper 15a formed by a combination of a tenon and a tenon hole is assembled.
The valve stem 12 has a water passage hole 2 penetrating the entire length in the axial direction.
1, the upper end of the water hole 21 has a threaded opening 6a and the pin 14 is installed on its outer periphery, and the outside of the lower end has a combination of tenons corresponding to the tenon holes of the plate valve 16. A rotation stopper 15b is provided. The pressure adjustment case 22 is provided with a pressure adjustment plate 23 inside to divide it into a pressure adjustment chamber 24 and a pneumatic chamber 25, and this pressure adjustment case 22 has a threaded portion connected to the screw port 6a at the center of the lower surface. 26 and a water hole 21a communicating with the water hole 21 is provided at the center of the threaded portion 26,
Also, in the center of the top surface is a screw hole 6 for the handle H, which will be described later.
The valve stem 1 has a threaded portion 26a coupled to the valve stem 1.
It is configured to be assembled integrally with 2.

The plug 10 has a threaded part 26b coupled to the threaded opening 6 on the outer periphery of the lower part, and the fitting part 1 inside.
The valve case 9 has a symmetrical fitting part 11' corresponding to the fitting part 11' so that the valve case 9 is assembled into the socket 5 of the faucet 1 during assembly. The handle H is made of synthetic resin and has an almost inverted cup shape, and has a space large enough to accommodate the pressure adjustment housing 22 inside. It has been adapted to be enveloping.

The plate valve 16 has an inverted groove-shaped valve port 27 on the lower surface, and this valve port 27 communicates with the water passage hole 21 of the valve stem 12 and at the same time communicates with the water passage hole 21b of the plate valve 17. , the pair of valve ports 28, 28 of the plate valve 17 and the valve port 27 are always in communication regardless of whether they are opened or closed. Note that the plate valve 17 is prevented from rotating by a combination of a tenon hole provided on the lower surface and a tenon in the bottom plate 19.
5c, and the bottom plate 19 and the faucet 1 are similarly fixed by a rotation stopper 15d.

Now, the relationship between each part shown in Fig. 3 is that chamber 3 and the water pipe are in communication, so the water in chamber 3 flows through the through hole 7.
It passes through the water hole 21b of the plate valve 17 that communicates with the plate valve 16, passes through the valve port 27 of the plate valve 16, and the water hole 21 of the valve stem 12 that communicates with the valve port 27, and communicates with the upper part of the water hole 21. The pressure operating plate 23 is changed from the state shown in FIG. 1 to the state shown in FIG. The air in the pneumatic chamber 25 is compressed.

Next, operate the handle H in the valve opening direction to open the plate valve 16.
When the correspondence relationship between the plate valve 16 and the valve 17 is changed from the fully open state shown in FIG. 3 to the fully open state shown in FIG.
The water reaches the pressure adjustment chamber 24 through the water passage holes 21 and 21a and is absorbed into the pressure adjustment chamber 24. Due to the impact applied to the pressure adjustment chamber 24, the pressure adjustment plate 23 is largely displaced from the state shown in FIG. is not displaced any further due to the compressed internal pressure of the air pressure chamber 25. Due to the above impact absorption, plate valve 16 and plate valve 1
The water hammer generated in the valve ports 27, 28 of No. 7 and the inside of the chamber 2 can be significantly alleviated, and the influence of this shock wave on the inside of the water pipe can also be significantly alleviated. Thereafter, as the shock at the time of switching subsides, the pressure adjusting plate 23 gradually recovers due to the repulsion of the compressed air in the air pressure chamber 25 and returns to the state shown in FIG. 3.

Since this invention has the above configuration, it has the following advantages.

(1) Attach a pressure adjustment housing to the end of the valve stem, store this pressure adjustment housing inside the handle, and connect the pressure adjustment housing to the valve opening of the plate valve and the faucet chamber to allow water to flow through the valve stem. Since the holes communicate with each other, water hammer when the plate valve opens and closes can be significantly alleviated, and the valve function of faucets, various components, and water pipes can be reliably protected from impact caused by water hammer.

(2) Provide a water hole in the plate valve on the fixed side so that one end communicates with the water hole in the valve stem through the valve opening of the movable plate valve, and the other end communicates with the primary pressure side chamber of the faucet. Since the faucet chamber and the pressure adjustment chamber of the pressure adjustment case communicate with each other regardless of whether the valve opening of the plate valve is opened or closed, the pressure adjustment chamber and the primary pressure side chamber are always maintained at the same pressure. This can significantly reduce the impact when water hammer occurs.

(3) The impact caused by water hammer can be significantly reduced compared to conventional ones, so the impact of impact on the valve opening/closing function, valves, other parts, and water pipes, etc. is significantly reduced, and the valve function of faucets is improved. can be maintained in a favorable condition over time.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of the proposed device, Fig. 2 A to E are exploded explanatory views of the valve case and each interior member, Fig. 2 F is a plan perspective view of the pressure adjustment casing, and Fig. 3 is
FIG. 4A and FIG. 4B are explanatory diagrams of the correspondence of the valve ports of the plate valves, and FIG. 5 is an explanatory diagram of the prior art. Explanation of symbols of main parts, 1... Faucets, 5...
Socket, 9... Valve case, 12... Valve stem, 16, 1
7... Plate valve, 21, 21a, 21b... Water hole,
22...Pressure adjustment housing, 26...Screwed part, 27,2
8... Valve mouth, H... Handle.

Claims (1)

[Scope of utility model registration request] A fixed plate valve 17 having a valve port 28 and a water passage hole 21b penetrating both sides, and a valve port 27 opening like a blind hole on the bottom surface are slidably installed in the valve case 9. A water hole 21 that connects to the socket 5 of the faucet 1 and penetrates the valve case 9 in the axial direction.
A pressure adjustment case 22 is attached to the valve stem 12 via a threaded part 26 that also has a water passage hole 21a, and a handle is attached to the other threaded part 26a of this pressure adjustment case 22. By combining H,
A water hammer prevention device for faucets using a plate valve, characterized in that a pressure adjustment housing 22 is covered with a handle H, and the water passage holes 21, 21a, and 21b are kept in constant communication.