JPH0989137A - Change-over valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change over surely a flow path by providing a water passing through hole to afford communication between a water supply port and water jet port in a predetermined position of a lever in a valve element and forming a notch opening respectively to the water supply port and valve chamber in the outer surface of the valve element when the lever is pivoted by 90 deg. and further opening the water jet port to the external apparatus and the valve chamber. SOLUTION: A water passing hole 7a having the same diameter as a through hole 4 is provided as a first flow path in a spherical valve element 7 on a predetermined position of a lever. Under such condition, fluid from a water supply port 1 is ejected straight through the water passing hole 7a of the spherical valve element 7 from a water jet port 2. On the other hand, the spherical valve element 7 is formed on the outer surface with a notch 7b as a second flow path. When a lever 9 is rotated by 90 deg., fluid flowing in from the water supply port 1 flows through a through hole 4 into a valve chamber 6 along the notch 7b and is sent out through a water sending port 11 to the external apparatus. The circulating fluid is ejected through a water inlet 12 from the water jet port 2. Then, since the through hole 4 at the water jet port 2 side is closed by the self sealing action of the spherical valve element 7, the fluid is not leaked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a switching valve capable of switching a flow passage into two systems by rotating a spherical valve element.

[0002]

2. Description of the Related Art Generally, a ball valve is a self-sealing type in which a spherical valve body is rotatably held on a spherical valve seat, and the valve can be opened and closed quickly by rotating the valve body 90 degrees. Is. Conventionally, in order to configure a switching valve with this ball valve, there has been a spherical valve body provided with a T-shaped through hole as a flow path. According to this configuration, the through hole has two flow paths, a straight path and an intersecting path orthogonal to the straight path. Of these, when the straight path connects the primary side and the secondary side,
The fluid entered from the primary side can be discharged straight to the secondary side. On the other hand, when the valve body is rotated 90 degrees from this state, the intersection is opened to the primary side, and at the same time, the direct path is opened to the valve chamber, and the fluid entering from the primary side can be passed through the valve chamber. That is, by rotating the valve body, it is possible to switch to two systems of a flow path connecting the primary side and the secondary side and a flow path connecting the primary side and the valve chamber. Such a switching valve is attached to a water faucet, and a water outlet opening to a valve chamber is connected to a water inlet side of a water purifier, whereby raw water and purified water can be switched by operating a valve body.

[0003]

However, in the switching valve of the above-mentioned form, even if the primary side and the secondary side are in communication with each other, the intersection opens to the valve chamber, so that the fluid passing through the direct path does not flow. There is an inconvenience that it branches into the intersection and flows into the valve chamber, resulting in inadvertent outflow to external equipment. That is, when this switching valve is connected to a water purifier as an external device, there is a problem that raw water and purified water are mixed.

By the way, the ball valve has the advantage that it can be operated quickly. However, the ball valve element is rotated by rotating the spherical valve element from the above state (the primary side and the secondary side communicate with each other by a straight path). When switching the flow path to connect the chamber,
Since the flow path to the secondary side is suddenly cut off, as a result, a so-called water hammer phenomenon is likely to occur, and this phenomenon has a problem that it adversely affects not only the valve itself but also various instruments connected thereto. .

The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a switching valve in which the switching of the water flow passage is reliable and the water hammer phenomenon does not easily occur.

[0006]

In order to achieve the above object, the present invention has a water inlet on the primary side and a water outlet on the secondary side with a valve chamber sandwiched between them, and a spherical valve element is provided in the valve chamber. The basic structure is a ball valve that is rotatably accommodated by a lever connected via a stem. Then, at a predetermined position of the lever on the spherical valve body, a water passage hole which communicates the water supply port and the water discharge port is provided so as to penetrate, and at the above-mentioned position (a state where the water supply port and the water discharge port are communicated) on the outer surface of the valve body A cutout was formed in each of the water supply port and the valve chamber when the lever was rotated 90 degrees. Furthermore, a switching valve was constructed by providing a water outlet to an external device by opening it in the valve chamber. In this way, by rotating the spherical valve element with the water passage and the notch independently formed as the flow passage by the lever, the water supply port is used as the fluid inlet and the flow path to the discharge port and the flow to the outlet port are provided. You can switch to two systems of road.

According to a second aspect, in the invention according to the first aspect, the notch is formed so as to be inclined from the water supply port toward the valve chamber. In this case, the fluid that has entered from the water supply port flows into the valve chamber along the slope of the notch, so the pressure loss is small.

Further, in the third aspect, in the invention according to the first or second aspect, a means of selectively providing a means for opening a water outlet to provide a water inlet from an external device.
In this case, the fluid can be discharged from the same spout in any of the two systems.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of a switching valve according to this embodiment, in which a cylindrical valve box 3 having a water supply port 1 on the primary side and a water discharge port 2 on the secondary side is provided with a through hole 4.
The valve chamber 6 is formed by partitioning the partition plate 5 formed with 4. A spherical valve body 7 is connected to a lever 9 via a valve stem 8 in the valve chamber 6 and is rotatably held by a spherical seat 10. Reference numeral 11 denotes a water outlet opening to the valve chamber 6 to an external device (not shown) such as a water purifier, and in the present embodiment, a water inlet 12 opening to the water outlet 2 from the external device is provided. Although the water inlet 12 can be omitted, the reason why the water inlet 12 is provided in the present embodiment is that the same water outlet 2 is used regardless of which flow channel is selected in the present invention having two channels. This is for discharging the fluid from the. For example, when this switching valve is attached to a tap and used for switching with a water purifier,
All of the purified water can be discharged from the same water outlet 2, which is convenient.

Next, the two flow paths provided in the spherical valve body 7 will be described. First, as the first flow path, at the lever 9 position in FIG. 1, the spherical valve body 7 is provided with a water passage hole 7a having the same diameter as the through hole 4. In this state, the fluid flowing in from the water supply port 1 passes through the water passage hole 7a of the spherical valve body 7 and the water discharge port 11
Can be discharged straight from. That is, when this switching valve is attached to the water faucet for switching to the water purifier, the raw water from the water faucet can be discharged as it is.

On the other hand, the spherical valve body 7 is formed with a notch 7b on the outer surface thereof as a second flow passage. Specifically, as shown in FIG. 2 from the state of FIG.
Notches 7b are formed on the outer surface of the spherical valve body 7 so as to open to the water supply port 1 and the valve chamber 6 when rotated by 0 degree. In this state, the fluid flowing in from the water supply port 1 flows into the valve chamber 6 through the through hole 4 along the notch 7b, and the water discharge port 1
1 to be sent to an external device. Then, the fluid circulating through the external device passes through the water inlet 12 and is discharged from the water outlet 11. At this time, since the through hole 4 on the water discharge port 11 side is blocked by the self-sealing action of the spherical valve body 7, the fluid does not leak from the through hole 4.

In order to clarify the relationship between the water passage hole 7a and the notch 7b, a perspective view of the spherical valve body 7 is shown in FIG. 3A shows a state in which the water supply port 1 and the water discharge port 2 are communicated with each other through the water passage hole 7a, which corresponds to the direction of the spherical valve body 7 in FIG. In addition, FIG.
It shows a state in which the water supply port 1 and the valve chamber 6 are communicated with each other by the notch 7b, and corresponds to the orientation of the spherical valve body 7 in FIG.

With the above-described structure, the switching valve of this embodiment can switch the flow paths of the two systems each time the lever 9 is rotated 90 degrees. Further, the water passage hole 7a and the notch 7b have independent flow paths that do not interfere with each other, so that the flow paths can be switched reliably. Notch 7b
The shape is not limited on the condition that it is opened in each of the water supply port 1 and the valve chamber 6, but as shown in the present embodiment, it is inclined from the water supply port 1 toward the valve chamber 6. It is preferable to form it. The reason is that the fluid flows into the valve chamber 6 along the slope of the notch 7b, so that the pressure loss can be reduced.

[0014]

As described above, the spherical valve body rotatably held is provided with the water passage hole which communicates the water supply port and the water discharge port at a predetermined position of the lever, and the valve body is also provided. Since the notch that opens to the water inlet and the valve chamber when the lever is rotated 90 degrees from the above position is formed on the outer surface of the, it is possible to independently secure the flow paths of the two systems, and Reliable switching of roads.

Further, in the invention of claim 2, since the notch is formed so as to be inclined from the water supply port toward the valve chamber, the pressure loss can be remarkably reduced, and as a result, the rotational torque of the valve body can be reduced. Since it can be made small, quick switching is possible.

Further, according to the invention of claim 3, since the water inlet from the external device is provided so as to be opened to the water outlet, the fluid can be discharged from the same water outlet regardless of which flow path of the two systems is selected. It is convenient and convenient.

[Brief description of drawings]

FIG. 1 is a sectional view of a switching valve according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the switching valve when the lever is rotated 90 degrees from the state of FIG.

FIG. 3 is a perspective view of a spherical valve body.

[Explanation of symbols]

 1 Water Supply Port 2 Water Discharge Port 3 Valve Box 4 Through Hole 5 Partition Plate 6 Valve Chamber 7 Ball Valve 7a Water Passage Hole 7b Notch 8 Valve Stem 9 Lever 10 Spherical Seat 11 Water Outlet 12 Water Inlet

Claims (3)

[Claims] 1. A water supply port is provided on the primary side and a water discharge port is provided on the secondary side across the valve chamber, and a spherical valve element is rotatably accommodated in the valve chamber by a lever connected through a valve stem. In the ball valve, a water passage hole that connects the water supply port and the water discharge port is provided in the valve body at a predetermined position of the lever, and the lever is rotated 90 degrees from the position on the outer surface of the valve body. A switching valve, characterized in that a notch is formed in each of the water supply port and the valve chamber when opened, and a water outlet to an external device is further opened in the valve chamber. 2. The switching valve according to claim 1, wherein the notch is formed so as to be inclined from the water supply port toward the valve chamber. 3. The switching valve according to claim 1 or 2, wherein a water inlet from an external device is added to the water outlet.