JP2794811B2 - Two-way switching valve - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a two-way switching valve having a water stopping function.

(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 the switching handle 101,
02 and first and second outlets 103 and 104. When the switching handle 101 is in the neutral position, the switching valve 100 urges each of the valve bodies 105, 106 outward from each other by a spring 107 mounted between the two valve bodies 105, 106 arranged coaxially apart from each other. Each of the packings 108 and 109 is configured to be brought into contact with each of the valve seats 110 and 111 to be in a water-stop state.

When the switching handle 101 is rotated in a specific direction, the stem 1
2 moves leftward in FIG. 2, the enlarged diameter end 113 of the stem 112 abuts on the right end 113 of the valve body 105, and pushes the valve body 105 leftward. This allows the inlet
Hot water, water, and the like supplied from 102 are discharged from first outlet 103.

When the switching handle 101 is turned in the opposite direction to the above, the stem 112 moves rightward in the drawing, and the head of the stem 112 is moved.
The valve element 106 engaged with the valve 115 is moved rightward so that hot water or the like flows out from the second outlet 104.

There is also known an automatic switching valve in which the switching handle 101 for sliding the stem 112 is constituted by a motor, a gear mechanism, and the like.

(Problems to be Solved by the Invention) As described above, the conventional switching valve includes a mechanism (for example, the switching handle 101) for driving the opposed valve bodies 105 and 106, each of the valve bodies 105 and 1 having the same structure.
Since the structure is provided on the outside in the axial direction of 06, the switching drive mechanism 101 has a shape protruding from the valve 100 main body, and the switching valve is arranged and stored in a narrow space, for example, when mounting a water supply device in the toilet body. It was difficult to do.

In addition, a direct-acting switching valve that directly drives a valve element consumes a large amount of power for driving the valve element. For this reason, it is conceivable to use two sets of pilot-type valve mechanisms. However, if they are simply arranged in parallel, the water supply device becomes large because the drive mechanisms are arranged at two places.

(Means for Solving the Problems) In order to solve the above-mentioned problems, a two-way switching valve according to the present invention has a first and a second valve body disposed in parallel and separated on one axis, and a pilot passage of each valve body. The first and second pilot valve elements for opening and closing the valve are located inside the respective valve elements, and each pilot valve element closes the pilot passage by interposing an urging means such as a spring between the pilot valve elements. And a drive device for electrically driving each pilot valve element is located between the valve elements.

(Operation) The first or second valve body can be opened by moving the first or second pilot valve body against the urging force of a spring or the like by the driving device. Since the driving device is arranged inside between the respective valve elements, the driving device does not protrude outward in the axial direction of each of the valve elements. Therefore, the degree of freedom of piping to the inflow port and the outflow port of the two-way switching valve increases, and the mounting space and the degree of freedom in the mounting direction of the two-way switching valve increase.

Further, since the pilot valve element is driven, power consumption is smaller than that of the direct drive type.

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

The two-way switching valve 1 bifurcates the inflow pipe 3 communicating with the inflow port 2 and communicates with the first outflow pipe 5 and the second outflow port 6 communicating with the first outflow port 4. A drive device 10 is provided between the second outlet pipe 7 and the first and second valve bodies 8 and 9 to operate the valve bodies 8 and 9 respectively.

Each valve body 8, 9 is arranged symmetrically with respect to the drive device 10, and has a substantially cylindrical partition wall 11, 11 protruding into the first and second outflow pipes 5, 7, this partition wall. The leading edges of 11,11 are formed as main valve seats 12,12, and the inner surfaces of inflow-side conduits 13,13
The outer circumferences of the diaphragms 15, 15 made of a flexible material are attached to the 14, 14 and 14 in a water-tight manner, and the substantially central portions of the diaphragms 15, 15 are brought into contact with the main valve seats 12, 12, so that the inflow-side conduits 13, 13 are provided.
And the first and second outflow conduits 5 and 7 are disconnected.

In addition, small-diameter orifices 16 and 16 are formed in the peripheral portion of the diaphragm 15 facing the inflow-side conduit 13 so that the inflow-side conduit 13 and
The thirteen pressure chambers 17 are communicated with each other. Further, pilot valve seats 18 and 18 and pilot passages 19 and 19 are provided at the center of the diaphragms 15 and 15 so that the pressure chambers 17 and 17 and the outflow pipes 5 and 7 communicate with each other. The first and second pilot valve bodies 20, 21 interlockingly connected to the drive mechanism are brought into contact with each other so that the communication between the pressure chambers 17, 17 and the outflow pipes 5, 7 is opened and closed.

In addition, elastic bodies 22, 22 for abutting on the pilot valve seats 18, 18 are connected to the ends of the pilot valve bodies 20, 21.

Further, the orifices 16, 16 have a smaller diameter than the pilot passages 19, 19 of the pilot valve seats 18, 18, and when the pilot passages 19, 19 are closed, the pressure in the pressure chambers 17, 17 increases, and the diaphragms 15, 15 Is pressed in the direction of the main valve seats 12 and 12 to close the valve bodies 8 and 9 and when the pilot passages 19 and 19 are open, the pressure in the pressure chambers 17 and 17 decreases and the inflow side pipelines 13 and 13 The diaphragm 15, 15 separates from the main valve seat 12, 12 by the pressure of
9 is configured to open. In the drawings, 23 and 23 are packings having small sliding resistance.

A driving device 10 for driving each pilot valve body 20, 21 is provided in a cylindrical casing 24, and is a plunger 25 movable along an axis and a first and a second for moving the plunger 25 by electromagnetic force. Two solenoids 26 and 27 are provided. A band-shaped magnetic body 28 is wound around the outer peripheral surface of the cylindrical plunger 25 at a substantially central position in the axial direction.
Are disposed axially outward of the magnetic body 28, respectively.
The proximal enlarged diameter portions 20a, 21a of the first and second pilot valve bodies 20, 21 are housed at both ends inside the plunger 25, and an urging force in the expansion direction is applied between the proximal enlarged diameter portions 20a, 21a. Each of the pilot valve bodies 20, 21 is urged toward the pilot valve seats 18, 18 by interposing a coil spring 29 having a coil spring 29, and each of the pilot valve seats 18, 18 is energized while the solenoids 26, 27 are not energized. Both are configured to be closed. The reduced diameter portion 24a formed substantially at the center of the inside of the casing 24 is a guide for regulating the axial position of the plunger 25.

With the configuration described above, for example, when the first solenoid 26 is energized, the plunger is moved toward the solenoid 26 by the electromagnetic force between the solenoid 26 and the magnetic body 28. Due to this, by the contact between the base end enlarged diameter portion 20a of the first pilot valve body 20 and the locking inner flange 25a of the plunger 25,
The first pilot valve body 20 moves rightward in the figure,
The first pilot valve element 20 is separated from the pilot valve seat 18. This allows the pressure chamber 17 to pass through the small diameter orifice 16.
The water filled in the air flows out to the first outflow pipe 5 through the pilot passage 19, and the pressure of the inflow pipe 13 causes the diaphragm 15 to move to the pressure chamber 17 side so that the first valve body 8 It will be open. Therefore, liquid such as water supplied from the inlet 2 flows out from the first outlet 4.

Similarly, when the second solenoid 27 is energized, the second valve body 9 is operated, and the second outlet 6 and the inlet 2 are in communication.

In this embodiment, the inflow port 2 is the first and the second outflow port 4,
Although it is formed in a direction orthogonal to 6, the direction of the inflow port 2 and the structure of the inflow pipe 3 are arbitrary.

Also, using a latching solenoid for the solenoid,
Power consumption may be performed only when the valve is driven.

(Effect of the Invention) As described above, in the two-way switching valve according to the present invention, the device for driving each diaphragm valve is provided at the center position of each diaphragm valve. Does not protrude from the valve body. For this reason, the degree of freedom of piping to the inlet and outlet is increased,
The mounting space of the two-way switching valve and the degree of freedom in the mounting direction are increased, and the two-way switching valve can be mounted even in a small space.

Also, since the pilot valve element is driven, the power consumption is smaller than that of the direct drive type. In addition, in the case of a power failure or the like, there is an effect that both the doors are closed and work as a safety mechanism.

[Brief description of the 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 the drawings, 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, 9 is a second valve, 10 Is a drive unit, 12 is a main valve body, 15 is a diaphragm, 16 is a small orifice, 17 is a pressure chamber, 18 is a pilot valve seat, 19 is a pilot passage, 20 is a first pilot valve body, and 22 is a second pilot valve. Pilot valve body, 24 is casing, 25
Is a plunger, 26 is a first solenoid, 27 is a second solenoid, 28 is a magnetic body, and 29 is a coil spring.

──────────────────────────────────────────────────続 き Continuing from the front page (72) Ryoichi Tsukada 2-8-1, Motomura, Chigasaki-shi, Kanagawa Prefecture Tochiki Kikai Co., Ltd. Chigasaki Plant (58) Field surveyed (Int.Cl. ⁶ , DB name) F16K 11/24 F16K 31/40

Claims (1)

(57) [Claims] A first valve body for opening and closing a first outlet and a second valve body for opening and closing a second outlet are arranged coaxially parallel and apart from each other, First and second pilot valve elements for opening and closing a pilot passage formed in the valve element are provided inside the respective valve elements, and a biasing means such as a spring is provided between the pilot valve elements. A two-way switching valve, wherein each pilot valve element is configured to close the pilot passage, and a driving device for electrically driving each pilot valve element is provided between each valve element.