JPS6018674A - Passage switch valve with stop function - Google Patents

Abstract

PURPOSE:To eliminate influence of hydraulic pressure upon discs and to keep constant the contact surface pressure of a fixed disc and a movable disc by providing a movable disc close to a fixed disc with a disc cover having a passage axially pierced therethrough. CONSTITUTION:A movable disc 5 is slidably rotated with a disc cover 6 for a fixed amount on a fixed disc 4 by operating a lever 9 to connect or intercept a water passing hole 5a or 5b of the movable disc 5 and water passing hole 4a or 4b of the fixed disc, thereby stopping water and adjusting the flow rate. The disc cover 6 is adapted to seal up the outer peripheral edge of a comparatively narrow inlet passage through a packing 14 and simultaneously to connect an outlet passage 6 to the water passing hole 5a of the movable disc. Thus, hydraulic pressure load applied upon the movable disc at the time of closing a valve can be remarkably reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION In which invention, by means of two disks in close proximity to each other,
This invention relates to a passage switching valve mainly used in showers, etc., which can switch the spout, shut off the water, and adjust the flow rate.

This type of switching valve has been widely used in the past.
For example, Pole valves or switching valves with two backing valves on the driving shaft have both shown imperfections in water-stopping performance due to the complexity of their structures. In addition to requiring rotational force, the backing was subject to significant wear.

On the other hand, for hot and cold water mixing faucets, etc., there is a switching valve mechanism in which one of two ceramic disks equipped with water holes that can communicate with each other can be rotated by a certain amount to freely select the water flow path. However, since it is necessary to regulate the contact surface pressure between the discs, it not only takes time and effort to assemble the discs while measuring the screw torque etc. for tightening the discs, but also requires the effort of assembling the discs while measuring the screw torque etc. for tightening the discs. As a result, the contact pressure between both disks fluctuated, making it impossible to maintain a constant valve operating torque.

Moreover, since the movable disk in this case is rotated by an operating ring that engages in its center,
If the contact surface pressure between the two disks increases, the core portion will be damaged due to the strain concentrated on the engaging portion, and the water stop function etc. will deteriorate in a short period of time due to significant wear between the two disks. It was something like that.

In order to solve these inconveniences, the present invention includes a fixed disk on the disk receiver of the valve body connected to the water supply pipe etc., which has a water passage hole penetrated at an eccentric position. A movable disk having a water passage hole that can freely communicate with the fixed disk is brought into close contact with the fixed disk. A disk cover penetrating through the passage is engaged, and the movable disk can be pressed by a spring loaded on the other side, while the movable disk is embedded in the valve body,
By configuring the movable disk to be rotatable by a certain amount via a lever that mutually engages with the disk cover, the influence of water pressure on the disk is eliminated and the contact surface pressure is always kept constant, while the movable disk 4' It is an object of the present invention to provide a switching valve in which an isk can rotate around the axis of a passageway.

Hereinafter, one embodiment of the switching valve of the present invention will be described in detail based on the drawings. 1 is the switching valve main body screwed onto the water supply pipe 2, 3 is a disc holder provided inside the switching valve, and 4 is located at an eccentric position. A fixed disk is provided with water holes 4a, 41) and is fitted watertightly into the disk receiver 3°, or 5 is the water hole 4a, 4.
A movable disk is provided with water passage holes 5a and 5b that can be communicated with b, and is rotatable in close contact with the upper surface of the fixed disk 4.Furthermore, 6 is a disk fixed to the movable disk 5 via an engaging portion 7. The cover is provided with passages 6a and 6b that communicate with the water supply pipe 2 and the water passage holes 5a and 5b of the movable disk, respectively. If so, the effective pressure-receiving surface in the passage when the valve is closed is balanced by making the sum of the sums the same.

However, the present invention does not necessarily require that the inlet and outlet areas 6c and 6d be the same.

Further, 8 is a spring elastically mounted on the outer periphery of the inlet side of the disc cover 6 and presses the movable disc 5 through the disc cover, and 9 is a lever externally fitted onto the valve body 1 so as to be rotatable by a certain amount. It is integrally attached to the disc cover 6 by means of a pin 11 that passes through a long hole 10 that is suitable for valve body construction.

In the figure, reference numeral 12 indicates a partition wall separating two water outlet holes 13a and 13b, one of which communicates with the shower, and reference numeral 14 indicates backings attached to various locations.

Further, the size, shape or position of the water holes 4a, 4b and 5a, 5b provided through the fixed and movable disks 4.5 are not particularly limited, but for example, as shown in FIGS.
By setting the above-mentioned water passage holes at the positions shown in FIG. This is advantageous when both disks 4.5 are made of ceramics with excellent adhesion and wear resistance.

The switching valve of the present invention having the above-mentioned configuration slides and rotates the movable disc 5 together with the disc cover 6 by a certain amount on the fixed disc 4 by operating the lever 9, thereby opening the water passage hole 5a or 5b of the movable disc. By communicating or cutting off the water passage hole 4a or 4b of the fixed disk, it is possible to freely select two water outlets 13a and 13b such as a shower or a normal faucet, and at the same time, water can be stopped and the flow rate can be adjusted. It's something you get.

The disk cover 6 seals the outer periphery of the relatively narrow inlet passage through the backing 14, and at the same time allows the outlet passage 6b to communicate with the water inlet 5a of the movable disk. Not only can the hydraulic load on the movable disk 5 be significantly reduced, but also by keeping the inlet outer diameter area 6c and outlet area 6d of each of the passages equal, the hydraulic pressure acting on the disk cover 6 can be mutually balanced, and both disks 4. The only contact surface pressure between 5 and 8 is spring 8.
It is designed to be maintained by the acting force of , thereby stabilizing the operating torque and significantly reducing wear on the disc.

In addition, the switching valve of the present invention completely blocks fluid leakage at the outer periphery of the inlet of the disc cover 6 that is fitted inside the valve body 1, so that the lever 9 can be directly connected to the valve body 1 on the passage axis. Since the movable disc can be embedded and rotated through the disc cover connected to the disc cover, it is less prone to straining and the disc compared to conventional products that rotate the movable disc at its center. In addition to completely eliminating damage to the movable disk 5, this, in combination with the above-mentioned effect of maintaining a constant surface pressure between the two disks, significantly improves the rotary operability of the movable disk 5, resulting in the exceptional effect that passage switching can be performed smoothly. It is played.

As described above, according to the switching valve of the present invention, fixed and movable disks 4.5 having the same shape can be used, and furthermore, the contact surface pressure for maintaining watertightness of both disks 4.5 is related to water pressure. Since it can be easily set using the spring 8, its manufacture and assembly are greatly simplified or facilitated, and excellent benefits that could not be expected from conventional switching valves of this type are obtained.

[Brief explanation of the drawing]

FIG. 1 is a cutaway side view showing the main parts of the switching valve of the present invention, FIG. FIG. 3 shows a disk cover and a disk in another embodiment. In addition, in the figure 1... switching valve body, 2... water supply pipe, 3...
・Disk receiver, 4... Fixed disk, 5... Movable disk, 6... Disc cover, 7... Engagement part,
8...Spring, 9...Lever. Patent applicant: Tabuchi Seisakusho Co., Ltd. Patent attorney: Kazuo Ohara

Claims (1)

[Scope of Claims] 1. A fixed disk having a water passage hole provided at an eccentric position is attached to a disk receiver provided on an example of the valve body, and the fixed disk can freely communicate with the water passage hole. A movable disk having a water passage hole is brought into close contact with the movable disk, and a disk cover formed by passing through a passage in the axial direction is engaged with the movable disk, while
The movable disk can be pressed by a spring loaded on the other side, and is attached to the valve body,
A passage switching valve having a water stop function, characterized in that the movable disk is rotatable by a certain amount via a lever that engages with the disk cover. 2. A passage switching valve with a water stop function according to claim 1, wherein the passage has two outlets. 3. A passage switching valve with a water shutoff function according to claims 1 and 2, wherein the inlet outer diameter area and the outlet area of the passage are substantially the same.