JP3086635B2 - Water stopcock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided between a water supply source and a water discharge device for ejecting water pumped from the water supply source, and automatically operates when the water discharge device is stopped. The present invention relates to a water stopcock that cuts off supply of water from a water supply source to the water discharging device.

[0002]

2. Description of the Related Art When water is discharged from a faucet such as a car washing operation or a water sprinkling operation, a hose connected to the faucet is used to avoid the trouble of returning to the faucet to stop the water. A water spray may be attached to the tip. This water discharge device was provided with an on-off valve, and the operator stopped the water when not needed while operating the on-off valve.

[0003]

However, if the water discharging device is operated to stop water with the faucet opened, the pressure in the hose may become high and the hose may come off from the faucet. Also, if the connection between the hose and the faucet is tightened with a clamp, etc. to prevent the hose from coming off, the inside of the hose will be at high pressure, so make the hose strong enough to withstand this high pressure. There is a need to. Further, when the water discharge device is suddenly stopped, there is a possibility that a water hammer phenomenon occurs and the hose or the water discharge device is damaged by the impact force.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a water stopcock which can prevent a hose from coming off during a water discharging operation and can prevent a hose and a water discharging device from being damaged by a water hammer phenomenon. And

[0005] In order to achieve the above object, the present invention is provided between a water supply source and a water discharge device for ejecting water pumped from the water supply source, and automatically operates when the water discharge device is stopped. In a water stopcock that cuts off the supply of water from a water supply source to a water discharge device, a water stop valve is provided in the middle of a flow passage formed in the water stopcock main body, and the water stop valve is opened by an urging means. When the water discharge device is operated to stop water while the water discharge device is being pressed in the valve direction, the pressure in the flow passage increases, and this pressure closes the water stop valve against the urging force of the urging means, and stops the flow passage. An air chamber is provided downstream of the water valve with an elastically deformable diaphragm interposed therebetween to absorb an impact force generated at the time of the water stopping operation of the water discharging device.

[0006] Therefore, in a state where the water is pressure-fed from the water supply source and the water discharging device is operated to discharge water, the water flows in the flow path of the water stopcock, and the pressure in this flow path decreases. ing. For this reason, the water stop valve is held at the valve open position and allows the flow of water. In this state, when the water discharging device is operated to stop water, the flow of water in the flow path is suddenly stopped, and a water hammer phenomenon occurs. The impact force due to the water hammer phenomenon is reduced by the elastic deformation of the diaphragm and the crushing of the air chamber. Further, since the pressure in the flow path increases, the water stop valve is closed against the urging force of the urging means, and the flow of water from the water supply source to the water discharge device is cut off.

In this case, it is preferable that the diaphragm defining the air chamber is a rubber film. The rubber film is elastically deformed by the impact force of the water hammer phenomenon, and returns to its original shape when the impact force disappears. Further, it is desirable that the diaphragm defining the air chamber is a bellows-shaped membrane. The bellows-shaped film expands under the impact of the water hammer phenomenon, and contracts to its original shape when the impact force disappears. Therefore, it can be used repeatedly.

It is preferable that the air chamber is provided to face the water shutoff valve. In this case, the air chamber and the water stop valve are arranged close to each other, and the water stopcock is downsized.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail based on the best mode shown in the drawings.

FIG. 1 shows an embodiment of a water stopcock to which the present invention is applied. This water stopcock 1 includes a water supply source and a water discharge device for ejecting water pumped from the water supply source. The water supply device automatically shuts off the supply of water from the water supply source to the water discharge device when the water discharge device is operated to stop water.
That is, the water supply port 2 of the water stopcock 1 is directly fixed to a tap 4 of a water supply as a water supply source, for example, as shown in FIG. A hose 5 is connected to the drain port 3 of the water stopcock 1, and a water discharge device 6 is connected to a tip (downstream end) of the hose 5.

It is to be noted that a well-known water discharging tool 6 is used. Therefore, although the description of the structure of the water discharging device 6 is omitted in this specification, the internal opening / closing valve (not shown) is opened by discharging the water discharging device 6 to spray water from the nozzle 6a. On the other hand, by performing the water stopping operation, the on-off valve can be closed to stop the water injection. Closed state of the on-off valve is quickly cut <br/> conversion Waru by the operation of the operator. Therefore, the worker can operate the water discharge tool 6 at hand to perform water discharge and stop water without directly operating the faucet 4.

As shown in FIG. 1, a flow passage 8 is formed in the water stopcock main body 7 of the water stopcock 1 so as to communicate from the water supply port 2 to the drainage port 3. In the middle of the flow path 8, a water stop valve 9 is provided. The water shutoff valve 9 is a valve housing 7 of the water stopcock body 7.
a is slidably inserted into a. The space between the water stop valve 9 and the valve housing 7a is sealed by a U-ring packing 10 in a liquid-tight manner.

A coil spring 12 is disposed between the water shutoff valve 9 and the water stopcock body 7 as an urging means. The coil spring 12 presses the water stop valve 9 in a valve opening direction, that is, toward the first cap 13 with a predetermined spring force F. When the water stop valve 9 is pressed against the first cap 13, the water stop valve 9 is separated from the valve receiver 14 and is in an open state. The packing 22 is fixed to the surface of the valve receiver 14. The water stop valve 9 in the closed state is pressed against the packing 22 and closes the flow path 8.

A pressure chamber 11 is formed on one side of the water stop valve 9, that is, between the water stop valve 9 and the first cap 13. The pressure chamber 11 communicates with the inside of the flow path 8 through a pressure introduction hole 9c that penetrates the water stop valve 9 in the axial direction. Therefore,
The pressure in the flow path 8 is guided into the pressure chamber 11. In addition,
The first cap 13 is screwed and fixed to the water stopcock body 7. A space between the first cap 13 and the water shutoff valve 9 and the water stopcock main body 7 is liquid-tightly sealed by a seal member 16. Reference numeral 15 in the drawing denotes a U-ring packing.

On the other hand, the valve receiver 14 and the second cap 17
And a sleeve 18 is interposed therebetween. An elastically deformable diaphragm 19 is sandwiched between the valve receiver 14 and the sleeve 18 in a liquid-tight manner. The inner peripheral edge of the end face of the sleeve 18 on the side of the diaphragm 19 is rounded off at a corner. Therefore, when the diaphragm 19 is elastically deformed toward the air chamber 20, the diaphragm 19 is not damaged. Thereby, the position passing through the valve receiver 14, that is, the flow path 8
An air chamber 20 is formed downstream of the water stop valve 9 and at a position facing the water stop valve 9 with a diaphragm 19 interposed therebetween. As is clear from the figure, the water stop valve 9 and the air chamber 20 occupy a wide portion in the water stopcock main body 7. The faucet 1 can be downsized. In the present embodiment, the diaphragm 19 is, for example, a rubber film. Further, the space between the second cap 17 and the water stopcock main body 7 is liquid-tightly sealed by a seal member 21.

The water stopcock 1 operates as follows to automatically close the flow passage 8.

When the water stopcock 1 is connected to the closed faucet 4, the inside of the flow passage 8 and the pressure chamber 11 are at atmospheric pressure, and the water stop valve 9 is operated by the spring force F of the coil spring 12. It is open. Then, when the water discharging tool 6 is subjected to a water discharging operation to perform the water sprinkling operation, and the faucet 4 is opened to flow the water vigorously, the water flows into the flow channel 8 and the pressure chamber 11. Since the passage area of the flow passage 8 is narrowed at the portion of the valve receiver 14, the speed of water flowing in the flow passage 8 increases at this portion, while the pressure decreases. Therefore, the pressure in the pressure chamber 11 is also reduced, and the water stop valve 9 is pushed by the coil spring 12 to maintain the valve open state. This keeps the flow of water allowed.

In this state, when the water discharging device 6 is operated to stop the water, the flow of the water flowing vigorously in the flow path 8 and the hose 5 is suddenly stopped, and the kinetic energy of the flow of the water is reduced to the pressure energy. And the high pressure is generated, and the high pressure region is propagated at high speed. That is, a water hammer phenomenon (water hammer phenomenon) occurs. However, the impact force due to the water hammer phenomenon is reduced by crushing the air chamber 20 while elastically deforming the diaphragm 19. Therefore, even when the water discharging device 6 is suddenly stopped, it is possible to prevent the water stopcock 1 and the hose 5 from being damaged due to the water hammer phenomenon. The air in the air chamber 20 is sealed by the diaphragm 19 and does not leak into the flow path 8. Therefore, when the impact force acting on the diaphragm 19 disappears, the air chamber 20 returns to the original volume.

When the water discharging device 6 is operated to stop water,
As described above, the inside of the flow path 8 and the inside of the hose 5 have a high pressure, so that the inside of the pressure chamber 11 also has a high pressure, and the water stop valve 9 resists the spring force F of the coil spring 12 as shown in FIG. When closed, the stopcock 1 automatically shuts off the flow of water from the faucet 4. Therefore, an abnormal increase in the pressure in the hose 5 is prevented.

Then, when the water discharging tool 6 is operated to discharge water again,
Since the water downstream of the water stop valve 9 is discharged from the water discharging device 6, the pressure in this portion is reduced. Further, the water in the pressure chamber 11 escapes into the flow channel 8 and the pressure in the pressure chamber 11 also decreases. Therefore, the water stop valve 9 is pushed back by the coil spring 12 and opens. For this reason, as shown in FIG.
The water on the upstream side of the water stop valve 9 starts to flow vigorously toward the water discharging device 6, and the water discharging operation can be resumed.

The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the gist of the present invention.
For example, the diaphragm 19 is not limited to a rubber film, but may be any material that can be elastically deformed and can define the air chamber 20 in a liquid-tight manner, and may be, for example, a bellows-shaped film made of resin or metal.

Further, the water stopcock according to the present invention may, of course, be used for a hose for connecting a faucet to a water injection device (water spout) of a fully automatic washing machine.

[0023]

As described above, in the water stopcock according to the first aspect, a water stop valve is provided in the middle of the flow passage formed in the water stop body, and the water stop valve is opened by the urging means. When the water discharge device is operated to stop water while the water discharge device is being pressed in the valve direction, the pressure in the flow passage increases, and this pressure closes the water stop valve against the urging force of the urging means, and stops the flow passage. An air chamber is provided downstream of the water valve through an elastically deformable diaphragm to absorb the impact force generated during the water stop operation of the water discharge device. Supply can be cut off. For this reason, it is possible to prevent the inside of a member such as a hose connecting the water supply source and the water discharge device from becoming high pressure, to prevent disconnection from a water supply source such as a hose, and to prevent damage to the hose and the like. it can. In addition, since the air chamber for buffering the impact force generated by the water hammer phenomenon is provided, it is possible to prevent the water discharge device and the like from being destroyed by the impact force,
Since the occurrence of the water hammer phenomenon can be tolerated, the water discharge device can be quickly stopped.

In the water stopcock according to the second aspect, the diaphragm is formed by a rubber film, and in the water stopcock according to the third aspect, the diaphragm is formed by a bellows-shaped membrane. Therefore, when it receives the impact force of the water hammer phenomenon, it deforms well, but when this impact force disappears, it quickly returns to its original shape and obtains durability that can withstand repeated use Can be.

Further, in the water stopcock according to the fourth aspect of the present invention, since the air chamber is provided to face the water stop valve, these can be arranged close to each other, and the size of the water stopcock can be reduced. be able to.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a water stopcock to which the present invention is applied, in a valve-open state.

FIG. 2 is a conceptual diagram showing a use state of the water stopcock of FIG. 1;

FIG. 3 is a sectional view showing a closed state of the water stopcock of FIG. 1;

[Explanation of symbols]

 Reference Signs List 1 water stopcock 2 water supply port 3 drainage port 4 faucet (water supply source) 6 water discharger 7 water stopcock body 8 flow path 9 water stop valve 12 coil spring (biasing means) 19 diaphragm 20 air chamber

Claims (4)

(57) [Claims] 1. A water supply source is provided between a water supply source and a water discharge device for ejecting water pumped from the water supply source, and the water discharge device automatically discharges the water from the water supply source when the water discharge device is stopped. In the stopcock that cuts off the supply of water to the tool, a stop valve is provided in the middle of the flow passage formed in the stopcock body, and the stop valve is pressed in the valve opening direction by the urging means, When the water discharge device is operated to stop water and the pressure in the flow path rises, the pressure closes the water stop valve against the urging force of the urging means, and the water stoppage in the flow path. A water stopcock provided with an air chamber on the downstream side of the valve, which absorbs an impact force generated at the time of a water stopping operation of the water discharge device, with a diaphragm capable of being elastically deformed provided. 2. The water stopcock according to claim 1, wherein the diaphragm is a rubber film. 3. The water stopcock according to claim 1, wherein the diaphragm is a bellows-shaped membrane. 4. The water stopcock according to claim 1, wherein the air chamber is provided to face the water stop valve.