JPH0410449Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to an improvement in an automatic water shutoff valve that automatically supplies or stops fluid flowing through a flow path by utilizing changes in the pressure of the fluid. .

[Conventional technology]

As a conventional technology of the above-mentioned automatic water supply valve, there is, for example, Japanese Utility Model Publication No. 53-3480. As shown in FIG. 4, this is a movable element 3 that slides up and down inside the water stop valve main body 30 to open and close the flow path within the water stop valve main body 30.
1, an O-ring 32 for preventing water leakage is provided on the sliding surface of the mover 31, and an upper chamber 33 in the water stop valve main body 30, which is divided into upper and lower halves by the mover 31, is made small. The lower chamber 35 is connected to the atmosphere through the hole 34, and the flow path is closed by an increase in pressure on the outflow side of the movable element 31, and opened by a pressure drop. A spring 36 is provided in the chamber formed by the water valve main body 30 and the movable element 31 to constantly bias the movable element 31 in the opening direction.
This spring 36 allows the movable element 31 to be sufficiently lowered during water supply, so that the water guide hole 37 formed on the circumferential side of the movable element 31 can be sufficiently opened.

In addition, in the figure, 38 is a connection part with a water faucet 39;
0 is a connection part with the hose 41, 42 is a leakage prevention gasket, 43 is an inlet, 44 is an outlet, 45 is a gasket provided at the closing portion 46 of the movable element 31, 47
is a water passage hole formed by the lower leg of the water introduction hole 37.

[Problem that the invention attempts to solve]

However, in the above-mentioned prior art, since the spring 36 is directly attached to the movable element 31 as a valve body, an imbalance tends to occur in the urging force of the spring 36 to the movable element 31, and when this imbalance occurs, the movable element 31 could no longer move smoothly in the vertical direction, and the opening/closing operations were sometimes delayed.

The present invention has been made with the above-mentioned considerations in mind, and its purpose is to provide an automatic water shutoff valve that can open and close quickly and smoothly.

[Means for solving problems]

In order to achieve the above-mentioned object, in the present invention, a valve body for opening and closing the internal flow path is provided in the main body of the water supply valve so as to be movable up and down, and the valve body can be moved up and down by opening and closing the end of the outflow path connected to the flow path. In an automatic water supply valve in which the valve body is moved up and down by changes in fluid pressure in an outflow passage, the valve body is formed to have a circular head in plan view and a circulation space below the head. a sliding portion, the valve body and a cylindrical valve body holder which is separate from the valve body and has a flange portion below the valve body are slid into a cylindrical valve body guide. A sealing member is provided between the valve body guide and the valve body holder and between the stop faucet main body and the valve body holder, and a seal member is provided between the valve body guide and the valve body holder. A spring is interposed between them to constantly bias the valve body holder in the valve opening direction.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

Figures 1 and 2 show an automatic water stop valve V according to the present invention.
FIG. 1 shows an open state, and FIG. 2 shows a closed state.

In the drawing, reference numeral 1 denotes a cylindrical water stop valve body (hereinafter referred to as the main body) that opens in the vertical direction, and a female threaded portion 2 is formed on the inner periphery of the upper part, and the lower terminal end of this female threaded portion 2. A stepped portion 3 is provided nearby. Reference numeral 4 denotes a through hole provided below this stepped portion 3, and the inside of the main body 1 communicates with the atmosphere through this through hole 4.

Reference numeral 5 designates a body holder that opens in the vertical direction and fixes a valve body guide 8, which will be described later, in a predetermined position within the main body 1. The upper inlet 6 of the body holder is connected to a water faucet J as shown in FIG. Main body 1 on the outer periphery
A male threaded portion 7 is formed to be screwed into the female threaded portion 2 of.

8 is a valve body guide, which opens in the vertical direction and has an inner peripheral surface 9.
A cylindrical body 9 having a smoothly formed shape, a spring receiving part 10 formed downward in the middle of the outer periphery of this cylindrical body 9, and a stopper part 11 connected to this spring receiving part 10 and extending downward. By screwing the body holder 5, the lower end of the stopper part 11 is held and fixed in a state in which it is brought into contact with the stepped part 3. 12 is a recessed part 1 formed in the upper part of the cylinder body 9
3 is a gasket for preventing water leakage, and a water passage hole 14 is opened in the center.

Reference numeral 15 denotes a valve body for opening and closing the flow path in the main body 1, which is composed of a valve head 16 that is circular in plan view, and four partition pieces, for example, formed to have a water passage space below the valve head 16. The guide part 17 moves up and down along the inner peripheral surface 9A of the valve body guide 8, and this up and down movement causes the valve head 16 to move through the water passage hole 14 of the seal 12. It is configured to open and close.

Reference numeral 18 denotes a valve body holder configured below the valve body 15 and separately from the valve body 15, and has a cylindrical body portion 19 that opens in the vertical direction and is in sliding contact with the inner circumferential surface 9A of the cylinder body 9 of the valve body guide 8. and a flange portion 20 that is located below the cylindrical body portion 19, has an outer diameter larger than the outer diameter of the cylindrical body portion 19, and is in contact with the inner circumferential surface 1A of the main body 1, and is independent of the valve body 15. It is designed so that it can be moved up and down. Grooves are provided on the outer peripheries of the cylindrical body portion 19 and the flange portion 20, and seal members 21 and 22 such as O-rings are provided, respectively. Further, the surface area of the flange portion 20 on the lower end surface side is considerably larger than the sum of the surface area on the upper end surface side of the cylindrical body portion 19 and the surface area on the upper surface side of the valve head 16.

A spring 23 biases the valve body holder 18 in the valve opening direction (downward), and is interposed between the spring receiving portion 10 of the valve body guide 8 and the upper surface of the flange portion 20.

24 is a connection part formed below the main body 1;
A sealing member 25 such as a ring is provided around the third
As shown in the figure, it is configured so that a hose H etc. can be connected thereto. 26 is an outlet.

Next, the operation of the automatic water supply valve V having the above structure will be explained. Now, as shown in Figure 3, connect the automatic water shut-off valve V to the water faucet J, and then connect the automatic water shut-off valve V
Water is to be sprayed by connecting hose H to.

When the water faucet J is opened with the water outlet h at the end of the hose H open, the valve body holder 18 receives the biasing force of the spring 23 and brings the lower end of its flange portion 20 into contact with the inner circumferential surface 1B of the main body 1. On the other hand, the lower end of the valve body 15 is attached to the valve body holder 18.
Since the valve head 16 and the gasket 12 are lowered while being in contact with the cylindrical body part 19 of the valve, the space between the valve head 16 and the gasket 12 is open, and water flowing from the water faucet J to the automatic water shut-off valve V is The water flows down the cylindrical body part 19 of the valve body holder 18 through the water passage space of the guide part 17 and reaches the outlet 26.
The water flows out from the water outlet h of the hose H.

Next, when the water outlet h is closed to prevent water from coming out from the water outlet h, the static pressure inside the hose H increases and the valve body holder 18 receives an upward force and slides upward. As a result, the valve body 15 moves upward. When the valve body 15 approaches the gasket 12, an upward suction force acts on the valve body 15, and the valve head 16 quickly moves to the water passage hole 1.
4 to shut off the water.

[Effect of idea]

As explained above, the automatic water shut-off valve according to the present invention has a valve body that moves up and down in response to changes in the pressure of the fluid flowing in the flow path and a valve body holder that are constructed separately, and the valve body is operated by a spring. Since the body holder is always biased in the valve opening direction, unnecessary force is not applied to the valve body and smooth movement is possible. Therefore, opening and closing operations can be quickly performed by changes in fluid pressure. It can be carried out. Another advantage is that vibration does not occur when the water outlet of the hose is squeezed to let out a small amount of water.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention,
Figure 1 is a vertical cross-sectional view when the automatic water supply valve is open, Figure 2
FIG. 3 is a longitudinal sectional view of the automatic water shut-off valve when it is closed, FIG. 3 is a diagram showing the state in which the automatic water shut-off valve is used, and FIG. 4 is a vertical sectional view showing the prior art. 1... Water supply valve body, 8... Valve body guide, 15
... Valve body, 16 ... Valve head, 17 ... Guide section, 1
8... Valve body holder, 20... Flange portion, 21,
22... Seal member, 23... Spring.

Claims (1)

[Scope of utility model registration request] A valve body that opens and closes an internal flow path is provided in the main body of the water supply valve so as to be movable up and down, and the valve body The automatic water supply valve is configured to move up and down, and the valve body includes a valve head that is circular in plan view and a guide portion formed to have a water passage space below the valve head, and the valve body and A cylindrical valve body holder, which is separate from the valve body and has a flange portion below, is provided below the valve body so as to be slidable within the cylindrical valve body guide. A seal member is provided between the valve body holder and between the stop faucet main body and the valve body holder, and a seal member is provided between the valve body guide and the valve body holder, and a seal member is provided between the valve body guide and the valve body holder in the valve opening direction. An automatic water shut-off valve characterized by a spring that is always energized.