JPH0463271B2 - - Google Patents

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a water supply valve used in water supply equipment, and more particularly to a water supply valve used as a faucet for tap water mixed with fine particles such as sand. .

[Technical background of the invention and its problems]

Water supply valves (hydrant faucets) used in water supply equipment are usually of the global valve type, which are opened and closed by moving a top-shaped gasket up and down. This type of water supply valve exhibits good opening and closing functions when tap water is clear and free of fine particles such as sand and mud, but if the water is not properly filtered and fine particles are mixed in. If this is the case, foreign matter such as sand will get caught between the seals, damaging the seal surface and rapidly reducing the sealing effect.

In addition, since the handle that opens and closes the valve is a screw-in type, there is a tendency to tighten the seals more than necessary to ensure that the valve is closed.
This results in an even faster rate of damage to the packing surface.

[Purpose of the invention]

The present invention has been made with these points in mind, and it is an object of the present invention to provide a water supply valve that can also be used as a water supply valve for tap water mixed with fine particles such as sand.

[Structure of the invention]

The present invention includes a valve chamber having an inlet and an outlet formed in a valve body, a valve seat disposed at the inner peripheral end of the inlet and the outlet of the valve chamber, respectively;
a ball-shaped valve body rotatably disposed in the valve chamber in close contact with the valve seat, forming a predetermined distance between the valve body and the valve chamber, and having a central through hole; In the water supply valve, the valve is opened and closed by rotating the ball-shaped valve body around a vertical axis that runs perpendicular to the central through-hole, and the ball-shaped valve body has a ball-shaped valve body that extends from the lowermost portion to the central through-hole. An opening is provided in communication with the ball-shaped valve body, and a small-diameter opening that is smaller in diameter than the opening that communicates with the outer surface of the ball-shaped valve body and the central through hole is provided in the upper part of the ball-shaped valve body, and when the valve is open, A part of the fluid in the central through hole is configured to flow out through the opening into the gap, and then return from the gap through the small diameter opening into the central through hole. This is a water supply valve featuring:

[Effect]

According to the present invention, when the valve is opened, the space between the lowest part of the ball-shaped valve body and the bottom of the valve chamber is constantly flushed out by the fluid flowing through the opening provided at the lowest part of the valve body. receive. In addition, some of the fluid in the central through hole flows out into the gap on the outer periphery of the valve body through the opening at the bottom of the valve body, and then flows into the central through hole from the small diameter opening provided in the upper part of the valve body. will be returned to.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing an embodiment of a water supply valve according to the present invention. In the figure, reference numeral 11 denotes a valve body in which a passage through which tap water flows is formed, and includes a faucet side member 11a and a fixed side member 11b.
It is constructed by combining. Inside the valve body 11, there are an inlet 12a and an outlet 12.
A valve chamber 12 is formed, and valve seats 13a and 13b made of a sealing member are arranged at the inner peripheral ends of an inlet 12a and an outlet 12b of the valve chamber 12, respectively. Further, within the valve chamber 12, a ball-shaped valve body 14 is rotatably disposed in close contact with the respective valve seats 13a and 13b.

This ball-shaped valve body 14 is connected to the inlet 1 of the valve chamber 12.
2a and the outlet 12b, and as shown in FIGS. 2 and 3, a central through hole 141 for water supply passage is provided in the center. Furthermore, an opening 142 having a relatively large diameter is provided at the lowest portion of the ball-shaped valve body 14 so as to communicate with the central through-hole 141 and to be perpendicular to the central through-hole 141 . Further, a pair of openings 143 having a relatively small diameter are provided in the upper part of the ball-shaped valve body 14 so as to communicate with the central through-hole 141 . Ball-shaped valve body 1
A groove 144 is formed at the top of the valve body 4 in a direction perpendicular to the rotation axis of the ball-shaped valve body 14 .

A valve opening/closing handle 15 is attached to the upper part of the ball-shaped valve body 14 with respect to a shaft 16 that is rotatably held with respect to the valve body 11. An elongated protrusion 16a is formed at the lower end of the shaft 16, and the protrusion 16a is inserted into and engaged with the groove 144 of the ball-shaped valve body 14.

Next, the operation of this embodiment having such a configuration will be explained.

As shown in FIG. 1, when the axes of the central through-hole 141 of the ball-shaped valve body 14 and the valve body 11 are aligned, tap water flows from the inlet 12a to the valve chamber 12 as shown by the arrow. It enters the central through hole 141 and flows from the outlet 12b to the faucet side member 11a. At this time, some of the tap water is stored in the central through hole 14
The liquid flows toward the large-diameter opening 142 communicating with the valve body 14, reverses within the space 12c formed between the lowest part of the ball-shaped valve body 14 and the bottom of the valve chamber 12, and flows toward the central through-hole 141 again. This flow toward the large-diameter opening 142 causes fine particles such as sand remaining in the bottom space 12c of the valve chamber 12 to flow out. Further, a part of the flow flowing into the large-diameter opening 142 side flows through the gap 12d formed between the valve chamber 12 and the ball-shaped valve body 14, as shown in FIG. It flows into the central through hole 141 again from the small diameter opening 143 of the . This flow prevents fine particles from being deposited on the outer periphery of the ball-shaped valve body 14.

When stopping the water supply, the handle 15 is rotated 90 degrees so that the central through hole 141 of the ball-shaped valve body 14 is perpendicular to the axis of the valve body 11.

In this way, according to this embodiment, a large flow is always generated in the space 12c between the lowest part of the ball-shaped valve body 14 and the bottom of the valve chamber 12, where the most minute particles tend to settle, and this space 12c Precipitation and deposition of fine particles can be prevented. In addition, a flow is also generated within the gap 12d at the outer circumference of the ball-shaped valve body 14, thereby preventing fine particles from being deposited. This prevents fine particles from entering between the valve seats 13a, 13b and the outer periphery of the ball-shaped valve body 14 even when the ball-shaped valve body 14 is rotated and comes into sliding contact with the valve seats 13a, 13b. .

In addition, the ball-shaped valve body 14 and the valve seats 13a, 13b
There is always a sliding contact between the two seals, and the closing operation is performed by crimping the two packing surfaces.
Foreign matter such as fine particles will not enter the surface of the sealing member.

According to this embodiment, even when water containing fine particles such as sand flows, the fine particles do not settle in the valve chamber or get stuck between the valve body and the valve seat. Good sealing performance can always be ensured. Moreover, since the water passage is straight, pressure loss is extremely small.

4 and 5 are modifications of the embodiment described above, and the same components are designated by the same reference numerals as in FIG. 1.

In the embodiment shown in FIG. 4, a bypass passage 21 is connected to the bottom of the valve chamber 12 and communicates with the outlet side 11c of the faucet side member 11a.

By providing the bypass passage 21, the valve chamber 1
The fine particles that tend to settle at the bottom of the valve chamber 12 flow directly to the outlet side 11c through the bypass passage 21, thereby making it possible to more reliably prevent the particles from settling at the bottom of the valve chamber 12.

In the embodiment shown in FIG. 5, a stirring rod 22 is erected in the valve chamber 12 from the bottom upward to the center through hole 141, coaxially with the large diameter opening 142.

By providing the stirring rod 22, the center through hole 1
41 and the large-diameter opening 142 to create a turbulent flow state, thereby making it possible to perform an even stronger flow-out action of fine particles.

FIG. 6 is a sectional view showing another embodiment of the present invention. In this embodiment, the opening provided from the lowermost part of the ball-shaped valve body is made larger than in the above-mentioned embodiments, so that a stronger outflow action can be produced. Other constituent elements are the same as those in the above-described embodiment, and therefore are indicated using the same reference numerals and their explanation will be omitted.

In this embodiment, the ball-shaped valve body 24 has a substantially saddle-shaped groove 242 having a large width in parallel with the central through-hole 241 at its lowermost portion. In the embodiment shown in FIGS. 7 and 8, the groove 242 has the same width as the diameter of the central through hole 241, but has a width smaller than the diameter of the central through hole 241. It's okay.

Similarly, a small diameter opening 243 and a groove 244 are formed in the upper part of the ball-shaped valve body 24.

According to this embodiment, when water is supplied by opening the valve as shown in FIG.
The flow flowing in the groove 242 exerts a flowing action on the bottom space 12c of the valve chamber 12. Similarly, it flows within the gap 12d between the outer circumferential portion of the ball-shaped valve body 24 and the valve chamber 12, and flows into the central through hole 241 from the small diameter opening 243 in the upper portion.

As a result, similar to the embodiment described above, the valve chamber 12
Fine particles are not precipitated or deposited in the bottom space 12c and the outer periphery of the ball-shaped valve body 24,
Good sealing performance can be maintained. especially,
In this embodiment, since the lowermost portion of the ball-shaped valve body 24 is completely removed by the groove 242, the bottom space 12c of the valve chamber 12 is exposed to the flow over a wide range, and the inside of the bottom space 12c is The action of flushing out the precipitate can be carried out more reliably.

In the description of this embodiment, an example is shown in which the opening/closing handle 15 is provided at the upper part of the valve body 11, but the handle 15 may be provided at the side of the valve body 11 in a horizontal direction. In this case,
A groove for engagement with the handle shaft is formed on the side of the ball-shaped valve body.

〔Effect of the invention〕

As explained above, according to the present invention, when the valve is opened, the space between the lowest part of the ball-shaped valve body and the bottom of the valve chamber is connected to the fluid flowing through the opening provided at the lowest part of the valve body. Therefore, since the water is constantly flushed out, even if the water contains fine particles such as sand, the fine particles will not settle in the bottom space of the valve chamber. In addition, some of the water in the central through-hole flows out into the gap on the outer periphery of the valve body through the opening at the bottom of the valve body.
Thereafter, the valve body is returned to the central through hole through the small diameter opening provided in the upper part of the valve body, so that the inside of the valve body is constantly cleaned. For this reason, deposition of fine particles within the gap can be prevented. Furthermore, since the valve is opened and closed only by rotating the ball-shaped valve body within a 90° range, there is less damage to the seal surface due to over-tightening, compared to conventional water valves where the seal is repeatedly crimped. Does not occur.

As described above, according to the present invention, even when used as a faucet for tap water containing fine particles, it can withstand long-term use without loss of sealing performance.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a first embodiment of the water supply valve according to the present invention, FIG. 2 is a sectional view taken along the line of FIG. 1, and FIG. 3 is a ball-shaped valve used in the embodiment shown in FIG. Perspective views of the body, Figures 4 and 5
The figures are a sectional view showing a modification of the embodiment shown in Fig. 1, Fig. 6 is a sectional view showing a second embodiment of the present invention, Fig. 7 is a sectional view taken along the line of Fig. 6, and Fig. 8 is a sectional view showing a modification of the embodiment shown in Fig. 1. 7 is a perspective view of a ball-shaped valve body used in the embodiment shown in FIG. 6. FIG. 11... Valve body, 12... Valve body, 12a...
...Inflow port, 12b...Outflow port, 13a, 13b...
... Valve seat, 14, 24 ... Ball-shaped valve body, 141,
241...Central through hole, 142...Large diameter opening, 1
43...Small diameter, 242...Concave groove.

Claims (1)

[Scope of Claims] 1. A valve chamber having an inlet and an outlet formed in a valve body, a valve seat disposed at the inner circumferential ends of the inlet and outlet of the valve chamber, respectively, and a valve chamber having an inlet and an outlet formed in the valve body. a ball-shaped valve element rotatably disposed in close contact with the valve seat, forming a predetermined distance between the valve chamber and the valve chamber, and having a central through hole; In the water supply valve, the valve is opened and closed by rotating about a vertical axis perpendicular to the central through-hole, and the ball-shaped valve body has a ball-shaped valve body that communicates with the central through-hole from a lowermost part. An opening is provided in the upper part of the ball-shaped valve body, and a small-diameter opening that is smaller in diameter than the opening that communicates with the outer surface of the ball-shaped valve body and the center through hole is provided in the upper part of the ball-shaped valve body, and when the valve is open, the center A part of the fluid in the through hole is configured to flow out into the center through the opening and then return from the center through the small diameter opening into the central through hole. water supply valve. 2. The water supply valve according to claim 1, wherein the opening provided at the lowermost portion of the ball-shaped valve body is a large-diameter through-opening. 3. The water supply valve according to claim 1, wherein the opening provided at the lowermost portion of the ball-shaped valve body has a groove shape formed in parallel with the central through hole.