JPH0434274A - Switching valve - Google Patents

Abstract

PURPOSE:To prevent a supply water pipe from its freeze without generating a trouble by providing a fine flow amount setting part, which discharges a fine amount of water, in a rotary valve, in the case of a switching valve which switches water to its stop and discharge by rotating the rotary valve built in a supply water faucet. CONSTITUTION:When an introducing port 30 is connected to an inflow port 21 and a discharge port 31 is connected to a first outflow port 9 by operating the lever of a rotary valve 2, water is discharged from a discharge port 26. When the inflow port 21 is closed by bringing the peripheral surface in a cylinder part of the rotary valve 2 into contact with a cylindrical having piece 29, water is stopped. When the rotary valve 2 is set to a position where a groove 34, formed in the peripheral surface in the cylinder part of the rotary valve 2, traverses a lower end edge of the cylindrical hanging piece 29 of a water stopping packing 11, a fine amount of water is placed in a valve chamber 24 through the groove 34. The water passes through the first outflow port 9 and the water discharge port 26 or the second outflow port 10 and a small hole 27 via a clearance between a valve chamber 24 and the rotary valve 2 to go out to the outside. Thus, freezing can be prevented by an outflow of fine amount of water without necessity for particularly operating a faucet valve.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a switching valve that is attached to a water faucet, particularly a kitchen faucet, and is capable of switching between water shutoff and water discharge by rotating a built-in rotary valve.

[Conventional technology]

This type of switching valve is used because it allows you to switch between water stop and water discharge at the tip of the faucet without turning the faucet tap, and it also normally switches the water discharge state between direct water and shower-like water discharge. Because of its functionality, it is often used in kitchen faucets.

[Problem to be solved by the invention]

However, conventional switching valves of this type have problems when used in cold regions. In other words, in the past, when the water was set to stop, the water was completely shut off, which could lead to the water pipes freezing at night in winter. It is necessary to slightly open the remaining faucet and set the switching valve to the water-discharging state so that a small amount of water flows. However, both the faucet stopper and the switching valve must be operated at the same time, which is troublesome and reduces the convenience of the switching valve. The present invention has been made in view of these points, and its purpose is to provide a switching valve that can cope with freezing of water pipes without any trouble.

[Means to solve the problem]

Therefore, the present invention provides a switching valve that is attached to a water faucet and can switch between water stop and water discharge by rotating a built-in rotary valve, and the rotary valve is equipped with a minute flow rate setting section that discharges water at a minute flow rate. It is characterized by the fact that [Function] According to the present invention, by setting the flow rate to the minute flow rate setting section, water flows slightly, so that water pipes can be prevented from freezing without having to operate the faucet. . [Embodiments] The present invention will be described in detail below based on the illustrated embodiments.The main body 1 is made of synthetic resin and is formed into a cylindrical shape with vertical openings, the mounting nut 7 attached to the upper part of the main body 1, and the main body 1. It consists of a lever 4 attached to the side surface of the main body 1, a water discharge plate 3 attached to the lower surface of the main body 1, and a cylindrical rotary valve 2 housed within the main body 1. The upper end of the main body 1 serves as an attachment part for a water faucet J. The main body 1 is provided with an inlet 21 on its upper surface that communicates with a faucet, and a tube 22 surrounding this inlet 21 is provided upright, and inside the tube 22 is a water stopper. 6 After inserting the mounting nut 7 removed from the main body 1 on which the gasket 11 is arranged into the water faucet, the auxiliary fixture 8, which has a fitting part with the simple 22 on the lower surface, is locked to the tip of the faucet. In this state, when the tip of the water faucet is inserted into the tube 22 and the mounting nut 7 is screwed onto the outer circumferential surface of the main body 1 and tightened, since the mounting nut 7 has an engaging part with the auxiliary fitting 8, At the same time as the main body 1 is attached to the faucet, the distal end surface of the faucet is pressed against the water-stop gasket 11. The center of the main body 1 is formed as a valve chamber 24 having a circular longitudinal section and opening to the -side. This valve chamber 24 is a part in which the rotary valve 2 is housed, and is open upward through the inflow port 21, and has a first outflow port 9 below and a second outflow port 10 diagonally downward. In addition, a cylindrical portion 25 surrounding the first outlet 9 is formed to hang down. The water discharge plate 3 attached to the lower surface of the main body 1 has a water discharge port 26 in the center of which a rectifying wire mesh 20 is arranged, and a large number of small holes 27 around the periphery for discharging water in a shower-like manner. By screwing into the male thread formed in the main body 1
When attached to the lower end of the cylindrical portion 25, the lower surface of the partition member 5 fits into the lower end of the cylindrical portion 25. The ring-shaped partition member 5 located between the cylindrical portion 25 and the water discharge plate 3 is provided with an Mfl1 piece 28 in its center via a plurality of ribs, and the first outflow port 9 Reference numeral 16 in FIG.
A ring 19 is a rectifying rib disposed between the partition wall member 5 and the water outlet 26, and includes a plurality of ring-shaped ribs. The rotary valve 2 housed in the valve chamber 24 is composed of a shaft and a cylindrical portion integrally formed with the shaft, and is a thin-walled rotary valve that hangs down from the water-stop gasket 11 along the inlet 21. A large inlet port 30 and a discharge port 31 that are connected to each other inside are opened on the circumferential surface of the cylindrical portion with which the lower end of the cylindrical hanging piece 29 comes into elastic contact. Furthermore, a thin groove 34 is formed on the circumferential surface of the cylindrical portion. Furthermore, a plurality of recesses 32 arranged in the circumferential direction are provided on the peripheral surface of the end of the cylindrical portion of the rotary valve 2 . This recess 32 is engaged with a ball 13 that is biased by a spring 12 and protrudes into the valve chamber 24, thereby giving a click to the rotation of the rotary valve 2. 2. Each positioning is performed. The rotary valve 2 is attached to the main body 1 by a holding plate 6. The holding plate 6, through which the shaft 33 of the rotary valve 2 passes, is attached to the main body 1 by screwing into a female thread formed on the inner peripheral surface of the opening of the valve chamber 24 that opens on the side of the main body 1, and the rotary valve 2 is This prevents the valve from coming out of the valve chamber 24. The lever 4 has a fitting part with the non-circular tip of the shaft 33 of the rotary valve 2 which penetrates the presser plate 6 and projects to the outside. 17 in the figure is a cover that hides the screw, which is fixed to the rotary valve 2 by a screw screwed into the rotary valve 2. Now, by operating the lever 4, as shown in FIGS. 1 and 2, the inlet 30 of the rotary valve 2 is connected to the inlet 21.
When the discharge port 31 and the first outflow port 9 are in communication with each other, water from the inflow port 21 flows to the first outflow port 9, hits the ribbed piece 28 of the partition member 5, and the flow velocity is weakened. After that, the water is rectified by the rectifying ribs 19 and the rectifying wire mesh 20 and discharged from the water outlet 26. Further, by operating the lever 4, the inlet 30 of the rotary valve 2 faces the inlet 21, and the outlet 3
1 is in communication with the second outlet 10, water from the inlet 21 passes through the inlet 30, the outlet 31, and the second outlet 10, hits the upper surface of the ring-shaped partition member 5, and is scattered. Thereafter, the water is discharged from the small holes 27 of the water discharge plate 3 in a shower-like flow. The outer peripheral surface of the cylindrical portion of the rotary valve 2 is a cylindrical hanging piece 5.
When the inlet 11 is closed in contact with the tap 5, the water from the faucet is stopped here. Further, the rotary valve 2 was set at a position where the edge 34 formed on the circumferential surface of the cylindrical portion of the rotary valve 2 crossed the lower edge of the cylindrical hanging piece 29 of the water-stop packing 11, as shown in FIG. Sometimes, a small amount of water determined by the cross-sectional area of the well 34 enters the valve chamber 24 through the groove 34 and enters the valve chamber 2.
4 and the rotary valve 2 through a clearance for rotation of the rotary valve 2, the first outlet 9 and the water outlet 26,
Alternatively, it flows out through the second outlet 10 and the small hole 27. Therefore, when there is a risk that the water pipes may freeze at night, freezing can be prevented by setting the above-mentioned minute flow rate setting so that the water flows little by little. Although the water stop part and minute flow rate setting part of the rotary valve 2 are explained separately here, if the valve is used in a place where there is a risk of freezing throughout the year, the minute flow rate setting part can be set instead of the water stop part. A setting section may be provided, and in this case, a sixth section may be provided.
As shown in the figure, there is a notch 4o in the waterproof seal 11.
A small amount of water may flow out through this notch 40 when the water is stopped.

【Effect of the invention】

As described above, in the present invention, by setting the minute flow rate setting section, water flows slightly, so that water pipes can be connected only by operating the switching valve without operating the faucet. It can prevent freezing and does not impair the convenience of the switching valve.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of one embodiment of the present invention, Fig. 2 is a transverse cross-sectional view of the same, Fig. 3 is a longitudinal cross-sectional view of the same when a minute flow rate is set, and Fig. 4 is a perspective view showing the external appearance of the same. 5 is a perspective view of the same rotary valve as described above, and FIG. 6 is a perspective view of a water-stop gasket according to another embodiment, in which 1 is the main body, 2 is the rotary valve, and 34 is a groove. Fig. 1 ■...Body 2 - Rotary valve 34... Agent Wei Patent attorney Ishi 1) Chief 7 Fig. 2 Fig. 3

Claims (1)

[Claims] (1) In a switching valve that is attached to a water faucet and can switch between water stop and water discharge by rotating the built-in rotary valve, the rotary valve must be equipped with a minute flow rate setting part that discharges water at a minute flow rate. A switching valve featuring: