JP2000039094A - Water hammer absorbing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To absorb the water hammer generated in sudden closing of mixing valves for water combination faucet and prevent the generation of a water hammer in opening of the valves after closing by forming a small hole regularly allowing a passing space to communication with an absorbing body on an adjusting valve element or valve seat, and limiting the flow rate of the fluid supplied from the absorbing body to the passing space. SOLUTION: When the lever of mixing valves for water combination faucet is operated in the closing direction, the pressure in a supply pipe 5 and a connecting pipe 6 is suddenly raised by the sudden closing operation, and a water hammer acts on an adjusting valve element after it is passed from the secondary chamber 9 of a stop cock 7 to the communicating hole 13 of a valve rod 12 and the passage of an adaptor 16. The adjusting valve element overcomes the energizing force of a spring and retreats from the valve seat, and the fluid enters into an absorbing body 28 to once to extend the absorbing body 28 within a case 19, so that the water hammer can be absorbed. When the lever of the mixing valves for water combination faucet is operated in the opening direction, the pressure water in the absorbing body 28 is discharged to the secondary chamber 9 of the stop cock 7 through the small hole of the adjusting valve element little by little, so that the secondary water hammer can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water hammer absorbing device capable of quickly absorbing a water hammer phenomenon occurring when a mixing faucet is opened and closed.

[0002]

2. Description of the Related Art Conventionally, when a water hammer absorber is connected to a water stopcock installed in a pipe of water or hot water connected to a mixing faucet of a single lever type or the like, a water tap occurs when the valve of the mixing faucet is opened and closed. FIG. 1 (FIG. 4 of the present application) of Utility Model Registration No. 309548 discloses a structure that can quickly absorb a water hammer. Referring briefly to FIG. 4, a water stopcock 41 provided in the middle of a pipe 40 is screwed with a valve stem 44 having a valve body 43 seated on a valve seat 42. At the end, a water hammer absorber 46 also serving as a handle of the water stopcock 41 is attached, and the water hammer absorber 46 is a cylindrical case 47.
And a bag-like cushion rubber 48 that is housed inside the cylindrical case 47 and absorbs the water hammer. When a water hammer occurs in the pipe 40 by closing the mixing faucet, the water hammer is transmitted from the pipe 40. It is fed into and absorbed by the cushion rubber 48 through the communication hole 45 in the valve body 43 and the valve rod 44, thereby making it possible to absorb water hammer.

[0003] In the above, when the mixing faucet is suddenly closed, the pressure in the piping rises sharply, and the water hammer pressure generated is:
It is introduced into the water hammer absorber and absorbed by the cushion rubber, but when the mixing faucet is next opened, the pressure in the pipe drops rapidly, and the pressure water in the cushion rubber is quickly returned to the pipe. There was a problem that a secondary water hammer occurred.

In order to solve the above-mentioned problem, it is conceivable that the pressure water in the cushion rubber is gradually returned to the pipe by reducing the diameter of the communication hole of the valve stem. There was a disadvantage that the water hammer at the time of sudden closing of the stopper could not be quickly absorbed into the cushion rubber.

[0005]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is that a water stopcock attached to a water supply or hot water supply pipe of a mixing faucet has a water hammer absorber also serving as a water stop handle. It is an object of the present invention to provide a water hammer absorbing device which not only absorbs a water hammer generated when a mixing faucet is suddenly closed, but also prevents the occurrence of a water hammer even when a valve is opened after closing.

[0006]

According to the present invention, there is provided a water hammer absorbing device provided with a water hammer absorber serving also as a water stopping handle, wherein the water stopcock attached to the supply pipe for water and hot water of the mixing faucet is provided. The water hammer absorber is adjusted so that it is always seated on the valve seat body by the urging force of the spring in the insertion hole of the mounting bracket that connects the secondary chamber of the water stopcock and the absorber that absorbs the pressure water that has risen in the supply pipe. It accommodates a flow rate adjusting member with a valve body interposed, and is provided from the absorber to the secondary chamber by forming a small hole in the adjusting valve body or valve seat that constantly communicates the secondary chamber and the absorber. This limits the flow rate of the fluid.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. The present invention, as shown in FIG.
The mixing faucet 2 is fixed to the top plate 1 of the sink or sink, and the left and right and up and down operations of the lever 3 provided at the upper end adjust the temperature and the flow rate of the fluid, and the rotatable spout 4 is connected to the outside. To be supplied. Top plate 1 of mixing faucet 2
A lower portion is connected with a pair of supply pipes 5 for supplying hot water or water to the mixing faucet 2, and is stopped between the supply pipes 5 and the connection pipes 6 communicating with the hot water supply source or the water supply source. Water taps 7, 7 are attached.

The water stopcock 7 forms a valve port 10 in the middle of the flow path for partitioning the primary chamber 8 and the secondary chamber 9, and a valve body 14 facing the valve port 10 from the secondary chamber 9 side is provided at the tip. Valve stem 1 placed
Reference numeral 2 denotes a male screw portion 15 engraved on the outer peripheral surface, which is screwed into the female screw portion 11 of the water stopcock 7, and the valve body 14 is rotated by rotation of the valve rod 12.
Can open and close the valve port 10, and the valve rod 12 has a cross section T that connects the secondary chamber 9 of the water stopcock 7 and a water hammer absorber 18 described later.
A communication hole 13 in the shape of a letter is formed.

The water hammer absorber 18, as shown in FIG.
A mounting bracket 20 coupled to the distal end of the valve stem 12 via an adapter 16 and mainly coupled to the other end of the adapter 16 in a cylindrical case 19 which also serves as a water stop handle, and a flow rate adjustment accommodated in the mounting bracket 20. The member 23, the absorber 28 communicating with the outlet side of the flow rate adjusting member 23 and coupled to the mounting bracket 20, and the compression chamber 30 between the absorber 28 and the case 19 are housed.

The flow rate adjusting member 23 is interposed between the flow path 17 of the adapter 16 and the absorber 28 in an insertion hole 22 penetrating through the center of the mounting bracket 20 connected to the adapter 16.
The adjusting valve body 25 urged by the spring 24 is in close contact with the valve seat body 26 even when the adapter 1
A small hole 27 is formed by notching a part of the outer peripheral surface so that the inside of the absorber 28 and the flow path 17 of No. 6 communicate slightly.
The shape and position of the small holes may be any shape. In short, even if the adjusting valve body is in close contact with the valve seat, the flow path of the adapter and the absorber may be in communication. Further, the small hole may be formed in the valve seat body instead of the regulating valve body.

The absorber 28 is connected between the outer periphery of a mounting bracket 20 in which an annular clamping edge 29 having a wavy cross section and is screwed to the adapter 16 and a case 19 via a sealing gasket 21 to seal water inside. When the pressurized water is supplied from the secondary chamber 9 of the stopper 7, it expands in the case 19 to absorb the water hammer.

A gas such as nitrogen gas is sealed in a compression chamber 30 formed between the absorber 28 and the case 19 to maintain the pressure in the compression chamber 30 at a constant value.

In the present invention, when the lever 3 of the mixing faucet 2 shown in FIG. 1 is operated in the water discharge direction, water is supplied from the primary chamber 8 to the secondary chamber 9 of the water stopcock 7 shown in FIGS. The pressure water of the fluid acts on the adjusting valve body 25 of the flow rate adjusting member 23 through the communication hole 13 of the valve rod 12, and the adjusting valve body 25 is seated on the valve seat body 26 by the urging force of the spring 24. The fluid is supplied little by little into the absorber 28 from the small holes 27.

Next, when the lever 3 of the mixing faucet 2 is operated in the valve closing direction, the pressure in the supply pipe 5 and the connecting pipe 6 rises sharply due to the abrupt valve closing operation, and a water hammer is generated. After the impact passes from the secondary chamber 9 of the water stopcock 7 to the communication hole 13 of the valve rod 12 and the flow path 17 of the adapter 16, it acts on the adjusting valve element 25, and the adjusting valve element 25 applies the urging force of the spring 24. Then, the fluid retreats from the valve seat 26 and the fluid instantaneously enters the absorber 28 and the absorber 28 expands in the case 19 to absorb the water hammer.

Next, when the lever 3 of the mixing faucet 2 is operated in the valve opening direction, the pressure in the supply pipe 5 and the connecting pipe 6 is reduced, and the adjusting valve body 25 is actuated by the biasing force of the spring 24 to the valve seat body 26. The pressure water in the absorber 28 is drained little by little from the small hole 27 of the regulating valve body 25 to the secondary chamber 9 of the water stopcock 7 through the flow path 17 of the adapter 16, and the secondary water is discharged. Water hammer can be prevented from occurring.

[0016]

According to the present invention, there is provided a water hammer absorbing device provided with a water hammer absorber serving also as a water stopping handle, wherein the water stopcock attached to the supply pipe for water and hot water of the mixing faucet is provided. The container has an adjusting valve body that is always seated on the valve seat body by the urging force of a spring in the insertion hole of the mounting bracket that communicates the secondary chamber of the water stopcock and the absorber that absorbs the pressure water that has risen in the supply pipe. By accommodating the interposed flow rate adjustment member, by forming a small hole in the adjustment valve body or valve seat body that constantly communicates the secondary chamber and the absorber,
Since the flow rate of the fluid supplied from the absorber to the secondary chamber is restricted, when the lever of the mixing faucet is closed, the water hammer generated in the supply pipe is accommodated in the flow rate adjusting member in the water hammer absorber. Is retracted to absorb the water hammer by rushing into the absorber, and then, when the lever is opened, the fluid is absorbed from the absorber of the water hammer absorber through the adjustment valve body of the flow rate adjustment member or the small hole of the valve seat body. The water is gradually drained into the secondary chamber of the stopcock to prevent the occurrence of a water hammer, and the water hammer phenomenon can be quickly absorbed in any case of opening and closing the lever.

Further, since it is only necessary to interpose the flow rate adjusting member in the conventional water hammer absorbing device, the device can be finished compactly, and the water hammer absorbing effect can be greatly improved.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a state in which a water hammer absorbing device of the present invention is attached to a water stopcock connected to a mixing faucet.

FIG. 2 is an explanatory view of a state in which a water hammer absorbing device is attached to a water stopcock.

FIG. 3 is an enlarged sectional view of the water hammer absorber.

FIG. 4 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 2 mixing faucet 5 supply pipe 7 water stopcock 9 secondary chamber 18 water hammer absorber 20 mounting bracket 22 insertion hole 23 flow rate adjustment member 24 spring 25 adjustment valve body 26 valve seat 27 small hole 28 absorber

Claims (1)

[Claims] 1. A water hammer equipped with a water hammer absorber also serving as a water stop handle, wherein the water hammer attached to the supply pipe for water and hot water of the mixing faucet is a water hammer absorber. A flow rate in which an adjusting valve body, which is normally seated on a valve seat body by a biasing force of a spring, is interposed in an insertion hole of a fitting that communicates a secondary chamber of the stopper and an absorber that absorbs pressure water that has risen in the supply pipe. The adjustment member is accommodated, and the adjustment valve body or the valve seat body is formed with a small hole that constantly connects the secondary chamber and the absorber, thereby limiting the flow rate of the fluid supplied from the absorber to the secondary chamber. A water hammer absorber characterized by the above-mentioned.