JPH0647781U - Ball valve - Google Patents

Abstract

(57) [Abstract] [Purpose] In a ball valve having four ports, it connects and disconnects the second port and the fourth port with a simple and inexpensive structure. [Structure] A ball 8 is housed in a valve body 1 and is rotated by a shaft 9 equipped with a handle 13. The valve body 1 is provided with a first port 20, a second port 21, and a third port in a plane orthogonal to the shaft 9. The valve body 1 is provided with a fourth port 23 in the extending direction of the shaft 9. A T-shaped through hole 25 and a notch 26 are formed in the ball 8. At a predetermined position of the shaft 9, the first port 20 communicates with the second port 21 via the through hole 25. When the shaft 9 is rotated 90 ° from the predetermined position, the first port 20 communicates with the third port through the through hole 25, and the fourth port
The port 23 communicates with the second port 21 via the notch 26.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ball valve that rotates a ball housed in a valve element with a shaft to switch a flow path, and more particularly to a ball valve having four ports.

[0002]

[Prior art]

 This type of ball valve has conventionally been constructed as shown in FIGS. A ball 33 is housed in the valve chamber 32 of the valve body 31, and a T-shaped through hole 34 is formed in the ball 33. The ball 33 is connected to a shaft 35, and a handle 36 is attached to the shaft 35. Around the ball 33, the valve body 31 is provided with a first port 37, a second port 38, a third port 39, and a fourth port 40. Outside the second port 38, a plurality of small holes 41 are formed in the valve body 31. A check valve 42 is provided at the fourth port 40.

Then, when the handle 36 is switched to the position shown in FIG. 10, as shown in FIG. 11, the first port 37 is communicated with the second port 38 through the through hole 34, and IN 1 to OUT 1, For example, a flow path from the water supply pipe to the discharge pipe is formed. At this time, as shown in FIG. 10, the water in the second port 38 flows into the valve chamber 32 through the small hole 41, but the check valve 42 is closed by the water pressure, and the second port 38 to the fourth port are closed. Backflow to 40 is prevented.

When the handle 36 is switched to the position shown in FIG. 12, as shown in FIG. 13, the first port 37 is communicated with the third port 39 through the through hole 34, and IN1 to OUT2, for example, a water supply pipe. A flow path from the to the water purifier is formed. At this time, as shown in FIG. 12, the check valve 42 is opened by the water pressure of IN2, the fourth port 40 is communicated with the second port 38 through the small hole 41, and IN2 to OUT1, for example, a water purifier. A flow path is formed from this to the discharge pipe.

[0005]

[Problems to be solved by the device]

 However, according to the conventional ball valve, it is necessary to provide the small hole 41 and the check valve 42 in the valve body 31 in order to connect and disconnect the second port 38 and the fourth port 40, which is troublesome to process. In addition, there is a problem that the number of parts increases and the cost increases.

The present invention has been made in view of the above problems, and an object thereof is to provide the second port and the fourth port at a low cost with a simple configuration without using a check valve or the like. It is to provide a ball valve that can communicate and shut off.

[0007]

[Means for Solving the Problems]

 In order to solve the above problems, the ball valve of the present invention is configured so that the ball accommodated in the valve body is rotated by the shaft to switch the flow path. The valve body is provided with a first port, a second port, and a third port in a plane orthogonal to the shaft. The valve body is provided with a fourth port in the extending direction of the shaft. The ball has a T-shape that connects the first port and the second port at a predetermined position of the shaft and connects the first port and the third port when the shaft is rotated approximately 90 degrees from the predetermined position. Through holes are provided. Further, the ball is provided with a notch that connects the second port and the fourth port when the first port and the third port communicate with each other.

[0008]

[Action]

 In the ball valve of the present invention, when the shaft is switched to the predetermined position, the first port is communicated with the second port through the through hole, and the third port and the fourth port are moved by the ball to the first port. It is blocked from the port and the second port. When the shaft is rotated 90 degrees from the predetermined position, the first port communicates with the third port through the through hole, and the fourth port communicates with the second port through the notch.

[0009]

【Example】

 An embodiment embodying the present invention will be described below with reference to FIGS. As shown in FIGS. 1 to 5, the valve body 1 is constructed by screwing three caps 3, 4, and 5 to a main body 2. For example, when a ball valve is installed in a sink, a water supply pipe is connected to the cap 3 via a nut 6, a water supply hose to the water purifier is connected to the cap 4, and a return hose from the water purifier is connected to the cap 5. To be done.

A valve chamber 7 is formed in the main body 2, and a ball 8 is housed therein. A shaft 9 for rotating the ball 8 is inserted into the main body 2, and a protrusion 11 engaging with a groove 10 of the ball 8 is provided at an inner end thereof, and a handle 12 is provided at an outer end by a screw 12. Is attached. By operating the handle 13 in the range of 90 °, the ball 8 is rotated via the shaft 9 and the flow path of the ball valve is switched. The main body 2 is provided with a pin 14 that determines the operating range of the handle 13.

Four valve seats 16, 17, 18, 19 are interposed between the valve body 1 and the ball 8 around the shaft 9. A first port 20 is formed in the valve seat 16 between the cap 3 and the ball 8. A second port 21 is formed in the valve seat 17 that faces the valve seat 16 with the ball 8 in between. A third port 22 is formed in the valve seat 18 between the cap 4 and the ball 8. These ports 20 to 22 are provided in a plane orthogonal to the axis of the shaft 9. Further, the cap 5 is provided with a fourth port 23 so as to be located in the extension direction of the shaft 9.

As shown in FIGS. 6 to 9, a T-shaped through hole 25 is provided inside the ball 8, and a notch 26 is formed on the outer periphery of the ball 8 at a position separated from the through hole 25. Has been done. The through hole 25 communicates the first port 20 and the second port 21 at a predetermined position of the shaft 9, and when the shaft 9 is rotated 90 ° from the predetermined position, the first port 20 and the third port 20. It communicates with the port 22. Further, the notch 26 is configured to connect the second port 21 and the fourth port 23 when the first port 20 and the third port 22 communicate with each other.

Now, when the handle 13 is operated to the position shown by the solid line in FIG. 1, the ball 8 is arranged by the shaft 9 at the position shown in FIGS. 2 and 3. Then, the first port 20 is communicated with the second port 21 through the through hole 25, and the third and fourth ports 22 and 23 are connected to the ball 8 and the valve seats 16 to 19 to form the first and second ports 20. , 21 is cut off. Therefore, the flow path from IN1 to OUT1, that is, from the water supply pipe to the discharge pipe can be formed in the ball valve. Although the third port 22 communicates with the fourth port 23 through the notch 26, no water flow is generated in the water purifier-side flow path connecting IN2 and OUT2.

When the handle 13 is operated to the position shown by the chain line in FIG. 1, the ball 8 is arranged by the shaft 9 in the position shown in FIGS. 4 and 5. The first port 20 communicates with the third port 22 through the through hole 25, and the fourth port 23 communicates with the second port 21 through the notch 26. Therefore, IN1 to OUT2, that is, the flow path from the water supply pipe to the water purifier, and IN2 to OUT1, that is, the flow path from the water purifier to the discharge pipe, can be formed in the ball valve. By the way, when the water is stopped, the water tap installed on the water supply pipe is closed.

As described above, in this embodiment, a simple and inexpensive structure is simply provided with the notch 26 in the ball 8 without providing a small hole in the valve body or providing a check valve or the like unlike the prior art. Thus, the second port 38 and the fourth port 40 can be easily connected or disconnected.

The present invention is not limited to the above embodiment, and may be embodied by arbitrarily changing the configuration as follows, for example, without departing from the spirit of the invention. (A) The handle 13 shown in FIG. 1 is configured to rotate 90 ° counterclockwise from the position indicated by the solid line, and a flow path is formed between the second port 21 and the third port 22 via the through hole 25. And forming a flow passage between the fourth port 23 and the first port 20 through the notch 26. (B) The diameter of the through hole 25, the shape of the notch 26, etc. may be changed appropriately. (C) The ball valve of the present invention may be applied to a hot water supply system or a solar system, or an oil supply system of various machines, in addition to the water purification system of the sink of the above embodiment.

[0017]

[Effect of device]

 As described above in detail, according to the present invention, the second port and the fourth port are connected and disconnected by a simple and inexpensive structure in which a notch is provided in the ball without using a check valve or the like. It has an excellent effect that it can be done.

[Brief description of drawings]

FIG. 1 is a plan view of a ball valve showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a sectional view of the ball valve showing an operating state different from that of FIG.

5 is a cross-sectional view taken along line CC of FIG.

FIG. 6 is a perspective view showing the shape of a ball.

FIG. 7 is a plan view of the ball of FIG.

FIG. 8 is a left side view of FIG.

9 is a sectional view taken along line DD of FIG.

FIG. 10 is a sectional view of a conventional ball valve.

11 is a cross-sectional view taken along the line EE of FIG.

FIG. 12 is a sectional view of the ball valve showing an operating state different from that in FIG.

13 is a sectional view taken along line FF in FIG.

14 is a sectional view taken along line GG of FIG.

[Explanation of symbols]

1 ... Valve body, 7 ... Valve chamber, 8 ... Ball, 9 ... Shaft, 20
… 1st port, 21… 2nd port, 22… 3rd port,
23 ... 4th port, 25 ... through hole, 26 ... notch.

Claims (1)

[Scope of utility model registration request] 1. A ball valve configured to rotate a ball housed in a valve element by a shaft to switch a flow path, wherein the valve element has a first port and a second port in a plane orthogonal to the shaft. , And a third port, and a fourth port in the extending direction of the shaft, wherein the ball has a first port and a second port at a predetermined position of the shaft.
It communicates with the port, and the shaft is approximately 9
The first port and the third port are provided with a T-shaped through hole that communicates the first port and the third port when rotated by 0 degree.
A ball valve having a notch that connects the second port and the fourth port when communicating with the port.