JPH0369870A - Two-way selector valve - Google Patents

Abstract

PURPOSE:To increase the freedom of piping to both inlet port and outlet port while increasing the space for attachment of a two-way outlet port while increasing the space for attachment of a two-way selector valve and the freedom of the direction of the attachment thereof by providing a device for driving a diaphragm valve at the center of the diaphragm valve. CONSTITUTION:When a solenoid 25 is deenergized, a resilient member 22b connected to the right forward end face 21b of a pilot valve element 20 abuts a pilot valve element 18b so as to close a pilot passage 19 while a second valve element 9 being closed. Meanwhile, in this condition, the left forward end face 21b of the pilot valve element 20 is lifted from a pilot valve seat 18 so that the first valve element 8 is opened, and accordingly, an inlet port 2 is communicated with a first outlet port 4. When this solenoid 25 is energized, the left forward end face 21a of the pilot valve element is moved leftward so as to close a pilot passage 19a in a pilot valve seat 18a, and accordingly, the first valve element 8 is turned into a closed condition. Meanwhile, the right end face 21b of the pilot valve element 18b of the second valve element 9.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a two-way switching valve having a normally open outlet and a normally closed outlet.

(Prior Art) FIG. 2 is a partial sectional view showing the structure of a conventional two-way switching valve.

The manual two-way switching valve 100 shown in FIG. 2 switches the flow path by rotating a switching handle 101, and has an inlet 102, an outlet 103 on the normally open side, and an outlet 103 on the normally closed side.
104. This valve body 105 is urged toward the normally closed side valve seat 107 by a coil spring 106, and the normally closed side gasket 108 comes into contact with the valve seat 107, and the normally closed side becomes water-stopped. Always open side packing 1
09 is spaced apart from the valve seat 110 on the normally open side so that the inlet 102 and the outlet 103 on the normally open side communicate with each other. By operating the switching handle 100, the stem 111 is moved to the normally open side of the valve seat 110 (left side in the figure).
It is configured to switch the flow path by moving to.

In addition, in an automatic two-way switching valve, the switching handle 101
The parts are composed of a solenoid or a combination of a motor and a gear mechanism.

(Problems to be Solved by the Invention) As described above, in the conventional switching valve, the mechanism for driving the valve body 105 (for example, the switching handle 101) is connected to each valve seat 107° 11.
Since this drive mechanism 10 is provided outside in the axial direction of
1 protrudes from the main body of the valve 100, making it difficult to arrange and store the switching valve in a narrow space, such as when mounting a water supply device inside the toilet main body.

Furthermore, a direct-acting switching valve that directly drives the valve body consumes a large amount of power for driving the valve body. For this reason, it is conceivable to use two sets of pilot type valve mechanisms, but if they are simply arranged in parallel, the water supply device will become larger because the drive mechanisms will be arranged at three locations.

(Means for Solving the Problems) In order to solve the above problems, the two-way switching valve according to the present invention includes:
A second valve element that opens and closes the first outlet is arranged coaxially in parallel and spaced apart, and a pilot valve element that opens and closes a pilot passage bored in each valve element is placed between each of the valve elements. A drive device that is provided to close either one of the pilot passages of the first or second valve body through a biasing means such as a spring, and that electrically drives the pilot valve body between each valve body. It is characterized by having the following.

(Operation) When the drive device is in a non-energized state, one pilot passage is closed by the biasing means, and the outflow port and inflow port on the other side are communicated. By energizing the drive device,
The pilot valve body moves to close the other pilot passage to switch the flow path. Since the drive device is disposed between each valve body, the drive device portion does not protrude outward in the axial direction of each valve body. Therefore, the degree of freedom in piping to the inlet and outlet of the two-way switching valve is increased, and the installation space in two directions and the degree of freedom in the installation direction are also increased.

In addition, since the configuration drives the pilot valve body, power consumption is lower than that of the straight valve type.

(Example) FIG. 1 is a sectional view showing the structure of a two-way switching valve according to the present invention.

The two-way switching valve 1 branches an inflow pipe 3 that communicates with an inflow port 2 into a bifurcated shape, and communicates with a first outflow pipe 5 that communicates with a first outflow port 4 and a second outflow port 6. First and second valve bodies 8.9 are interposed between the second outflow pipe 7, respectively, and a drive device 10 for operating these valve bodies 8.9 is provided.

Each valve element -8,9 is arranged symmetrically with respect to the drive device 10, and has a substantially cylindrical partition wall 11.11 projecting into the first and second outlet pipes 5,7. Partition wall 11.11
The leading edge of the valve is formed as the main valve seat 12, 12, and the outer periphery of a diaphragm 15.15 made of a flexible material is attached to the inner surface 14.14 of the inlet pipe line 13.13 in a watertight manner,
By bringing the substantially central portions of the diaphragms 15, 15 into contact with the main valve seat 12°12, communication between the inlet side pipe 13°13 and the first and second outlet pipes 5.7 is cut off. There is.

Further, a small-diameter orifice 16.16 is bored in the peripheral edge of the diaphragm 15 facing the inlet pipe line 13 to communicate the inlet pipe line 13.13 and the pressure chamber 17.17. Additionally, a pilot valve seat 18a is located in the center of the diaphragm 15.15.

18b and pilot passages 19a, 19b are provided to communicate the pressure chamber 17.17 and the outflow pipe 5.7, and the tip surface 21 of the pilot valve body 20 is interlocked and connected to the drive mechanism to each pilot valve seat 18a, 18b. .21 is brought into contact with the pressure chamber 17.degree. 17 to open and close communication between the pressure chamber 17 and the outflow pipe 5.7.

Note that the left and right tip surfaces 21a, 2 of each pilot valve body 20
1b is a pilot valve seat 18a.

Elastic bodies 22a and 22b are connected to each other to make contact with 18b.

In addition, the orifice 16.16 has a pilot valve seat 18a,
18b has a smaller diameter than the pilot passages 19a and 19b, and when the pilot passage is closed, the pressure in the pressure chamber 17.17 increases, pushing the diaphragms 15, 15 toward the main valve seats 12, 12, and the valve body 8. , 9 are closed and the pilot passage is open, the pressure in the pressure chamber 17.17 decreases and the pressure in the inlet pipe 13.13 causes the diaphragm 15.15 to separate from the main valve seats 12, 12, closing the valve. body 8,
It is configured to open 9. In addition, 23.23 in the figure is a gasket with low sliding resistance.

A drive device 10 that drives the pilot valve body 20 includes a solenoid 25 provided in a cylindrical casing 24, a cylindrical magnetic body 26 wound around the pilot valve body 20, and a second The coil spring 27 biases the valve body 9 toward the valve body 9 (toward the right side in the figure).

Inside the casing 24 are first and second reduced diameter parts 24.
a.

24b to form the pilot valve body 20 and the magnetic body 26
The shaft position of the first reduced diameter portion 24a is guided.
A coil spring 27 is interposed between the magnetic body 26 and the end face of the magnetic body 26.

With the above configuration, when the solenoid 25 is in a non-energized state, the elastic body 22b connected to the right end surface 21b of the pilot valve body 20 contacts the pilot valve seat 18b, closes the pilot passage 19, and closes the pilot passage 19. The second valve body 9 is closed.

On the other hand, in this state, the left tip surface 21a of the pilot valve body 20
Since it is spaced apart from the pilot valve seat 18, the first valve body 8 is in an open state, and the inlet port 2 and the first outlet port 4 are in a communicating state.

Next, when the solenoid 25 is energized, the left end surface 21a of the pilot valve body 20 moves toward the first valve body 8 side (left side in the figure) due to the electromagnetic force between the solenoid 25 and the magnetic body 26, and the pilot valve seat 18a The pilot passage 19a is closed and the first valve body 8 is switched to the closed state. On the other hand, the right end surface 21b of the pilot valve body 20 is separated from the pilot valve seat 18b of the second valve body 9. As a result, the liquid such as water that was filled in the pressure chamber 17 via the small-diameter orifice 16 is transferred to the second outflow pipe 7 via the pilot passage 19b.
diaphragm 1 due to the pressure of the inlet pipe 13.
5 moves toward the pressure chamber 17, and the second valve body 9 becomes open.

Note that the solenoid may be a latching solenoid to further reduce power consumption.

(Effects of the Invention) As explained above, the two-way switching valve according to the present invention is provided with a device for driving each diaphragm valve at the center of each diaphragm valve. No part protrudes from the valve body. For this reason, the degree of freedom in piping to the inlet and outlet increases, and
The mounting space and the degree of freedom in the mounting direction of the two-way switching valve are excellent, and the two-way switching valve can be mounted even in a small space.

Furthermore, since the configuration drives the pilot valve body, it has the effect that power consumption is lower than that of a direct drive type.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the structure of a two-way switching valve according to the present invention, and FIG. 2 is a partial sectional view showing the structure of a conventional two-way switching valve. In addition, in the drawing, 1 is a two-way switching valve, 2 is an inlet, 4 is a first outlet, 5 is a second outlet, 8 is a first valve body, 9 is a second valve body, 10 is a drive device, 12 is a main valve seat, 15 is a diaphragm, 16 is a small diameter orifice, 17 is a pressure chamber,
18a and 18b are pilot valve seats, 19a and 19b are pilot passages, 20 is a pilot valve body, 24 is a casing, 25 is a solenoid, 26 is a magnetic body, and 27 is a coil spring.

Claims (1)

[Claims] A first valve element that opens and closes the first outlet and a second valve element that opens and closes the second outlet are arranged coaxially in parallel and spaced apart, and a hole is formed in each valve element. A pilot valve element for opening and closing the pilot passage of the first or second valve element is provided by interposing a biasing means such as a spring between the respective valve elements to close either one of the pilot passages of the first or second valve element. A two-way switching valve, characterized in that a driving device for electrically driving a pilot valve element is provided between each of the valve elements.