JPH0557562U - Valve device - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a valve device having a latching solenoid as a driving member. According to the present invention, in a valve device in which a latching solenoid for performing opening / closing adjustment operation of a valve is connected to a valve body, a sealing flange for sealing a valve peripheral portion in a watertight manner is integrally formed with a plunger guide opening end of the latching solenoid. Was established in line.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a valve device having a latching solenoid as a driving member.

[0002]

[Prior Art]

 Conventionally, there is a diaphragm valve that opens and closes running water that is configured to use a power-saving latching solenoid to open and close the valve. This is because the pilot hole of the diaphragm valve is connected to the plunger tip of the latching solenoid. The diaphragm valve is opened and closed by opening and closing.

In order to connect the latching solenoid to the diaphragm valve in series, a precise sealing mechanism is required to prevent water from leaking from the diaphragm mounting portion provided in the middle of the flow path of the valve body.

Therefore, a pressing flange for pressing the peripheral edge of the diaphragm from the latching solenoid side is fitted into the valve body, and a watertight seal is provided between the pressing flange and the plunger guide on the latching solenoid side. , It is necessary to assemble so that water does not leak from the flow passage of the valve to the outside of the plunger guide in the latching solenoid.

[0005]

[Problems to be solved by the device]

 As described above, in the conventional solenoid-operated valve device, the seal flange is provided at the connecting portion between the valve body and the latching solenoid, so that the peripheral edge of the plunger guide opening of the solenoid is watertight while pressing and fixing the peripheral edge of the diaphragm. Due to the uniform sealing, the number of parts is large, and there are drawbacks such as the need for O-rings and water-tight processing to prevent water leakage from the abutting parts of the assembly members.

Furthermore, since the diameter of the open end of the plunger guide where the plunger appears and retracts is larger than the maximum cross-sectional diameter of the plunger, the plunger inside the plunger guide and the spring between the pole core and the like may be shaken during transportation. There was a risk that it would fall out of the plunger guide and be lost.

[0007]

[Means for Solving the Problems]

 According to the present invention, in a valve device in which a latching solenoid for adjusting the opening and closing of the valve is connected to the valve body, a seal flange for sealing the valve peripheral part in a watertight manner is integrally connected to the plunger guide opening end of the latching solenoid. The purpose is to provide a new valve device.

Further, the present invention is also characterized in that an inner bulging portion is formed on the inner peripheral wall of the plunger, and the diameter of the bulging portion is smaller than the maximum cross-sectional diameter of the plunger.

[0009]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a valve device M in which a latching solenoid K is connected to a diaphragm valve D as a valve body. In the valve device M, the latching solenoid K is shown. The structure of is as follows.

In FIG. 1, a yoke 1 having a U-shaped cross section is provided on the outermost side of the latching solenoid K, and a coil bobbin 2 is housed in the yoke 1.

The coil bobbin 2 is a tubular body wound by the coil 2a, and its upper and lower end surfaces and outer peripheral surfaces are integrally mold-coated with a polyester resin or the like.

Below the coil bobbin 2, a latching magnet plate 3 and a magnet holder 4 for mounting the magnet plate 3 are arranged.

A plunger guide insertion hole 5a is formed at the center of the coil bobbin 2, and a cylindrical plunger guide 5 is inserted in the insertion hole 5a. A pole core 6 is fixedly installed in the.

A plunger 7 is slidably inserted in the plunger guide 5 in the axial direction, and a tip portion of the plunger 7 is formed thinner than a body portion so that water can be easily introduced. The reduced diameter end portion 7a is formed, and the rear end is formed with a convex portion for fitting into the concave portion formed at the front end of the pole core 6.

Further, a spring storage hole 7b is formed at the rear end portion, and a return spring 8 is stored in the storage hole 7b.

The plunger guide opening end 5b formed at the lower end of the plunger guide 5 is integrally provided with a sealing flange 50 for sealing a diaphragm peripheral portion 31a described later in a watertight manner.

That is, at the peripheral edge of the opening of the plunger guide 5, there is integrally formed a sealing flange 50 composed of a disk-shaped flange main body 51 and an annular pressing collar 52 projecting from the peripheral edge thereof. The sealing flange 50 has a function of pressing the diaphragm peripheral portion 31a of the diaphragm valve D, which will be described later, against the valve case B for sealing. The plunger guide 5 and the sealing flange 50 are integrally formed of synthetic resin by injection molding.

Further, as shown in FIG. 2 and FIG. 3, the inner peripheral wall of the plunger guide opening end 5b in which the plunger 7 protrudes and retracts is bulged inward to form a step portion 5c, and further the outer peripheral surface of the tip end portion of the plunger 7 is formed. Is formed by reducing the diameter of the plunger guide opening end 5b so that the diameter R1 of the plunger guide opening end 5b is smaller than the maximum cross-sectional diameter R2 of the plunger 7, and when the plunger 7 advances, each step 5c , 7c are engaged with each other to prevent the plunger 7 from falling out of the plunger guide 5.

Further, as shown in FIG. 4, the inner peripheral wall surface of the lower half portion of the plunger guide 105 is bulged to reduce the inner diameter r1 of the plunger guide 105 and the outer periphery of the substantially lower half portion of the plunger 107. The surface can also be reduced in diameter.

As described above, the stepped portion 105c formed in the bulging portion in the lower half portion of the plunger guide 105 and the stepped portion 107c formed by the reduced diameter portion 107a in the lower half portion of the plunger 107 are provided in the plunger 107. The plunger 107 is configured to prevent it from slipping out of the plunger guide 105 when it is advanced, and more accurately guides the linear movement of the plunger 107 during the forward / backward movement, and when the plunger 107 is forward / backward operated. The eccentric load on the plunger guide is reduced as much as possible to eliminate the friction with the inner peripheral surface of the plunger guide, so that the plunger 107 can be accurately operated.

Further, the bulging portion of the plunger guide 105 has a splined cross-sectional shape as shown in FIG. 4, which improves water passage between the plunger 107 and the plunger guide 105. In the figure, 107b is a spring housing hole, and 150 is a sealing flange.

The latching solenoid K configured as described above is connected to the valve main body in order to drive the valve, and is configured as follows.

That is, as the valve body, the diaphragm valve D is used in the present embodiment, and as shown in FIG. 1, the main valve seat 30 is provided between the inflow side passage 22 and the outflow side passage 23. A diaphragm 31 is provided on the main valve seat 30 so as to connect and disconnect the inflow-side passage 22 and the outflow-side passage 23, and a diaphragm back chamber 32 is provided behind the diaphragm 31.

Further, the diaphragm back chamber 32 and the outflow side passage 23 are connected by a pilot hole 33, and the diaphragm back chamber 32 and the inflow side passage 22 are connected by a bleed hole 34.

The diaphragm peripheral edge portion 31a is in contact with the case step portion 60 formed on the inner peripheral wall of the casing of the diaphragm valve D, and the above-mentioned latching is provided on the diaphragm peripheral edge portion 31a in contact with the case step portion 60. A flange 50 for sealing, which is integrally provided in series with the plunger guide 5 of the solenoid K, is pressed.

That is, a latching solenoid K is arranged at a position facing the diaphragm 31 of the diaphragm valve D to open and close the diaphragm 31, and the plunger 7 of the latching solenoid K is provided in the pilot hole 33. The pressing flange 52 of the sealing flange 50, which is configured to come in contact with and separate from the plunger guide 5 and is integral with the plunger guide 5, presses the diaphragm peripheral edge 31a so that the peripheral edge 31a and the case stepped portion 60 are separated from each other. Since the clamping pressure is fixed and this structure is employed, the diaphragm valve D and the latching solenoid K have a sealing function at the connecting portion, the number of parts can be reduced, and the cost can be reduced, and the assembling work is also troublesome. It can be omitted.

The embodiment of the present invention is configured as described above. The operation of the valve device M will be described. When the valve is closed, as shown in FIG. 1, the coil of the latching solenoid K is shown. 2a is not energized, and the plunger 7 is attracted downward by the magnetic force of the latching magnet plate 3 to close the pilot hole 33, so that water flows from the inflow side passage 22 through the bleed hole 34 to the diaphragm back chamber 32. The water flows into the back chamber 32 through the path, and the diaphragm 31 is pressed against the main valve seat 30 by the water pressure of the inflowing water, and the inflow passage 22 is blocked.

At this time, since the diaphragm peripheral portion 31a is watertightly sealed by the sealing flange 50 that is integrally provided with the plunger guide 5, the water that has flowed into the diaphragm back chamber 32 does not leak to the outside. There is no.

When the latching solenoid K is energized in this valve closed state, the plunger 7 is attracted to the pole core 6 against the spring 8 and separated from the pilot hole 33, and the pilot hole 33 opens. To do.

Therefore, the water in the diaphragm back chamber 32 flows to the outflow side passage 23 through the pilot 33. At this time, since the diameter of the pilot hole 33 is larger than the diameter of the bleed hole 34, the water to the diaphragm back chamber 32 is The amount of outflow from the pilot hole 33 becomes larger than the amount of inflow of water, and therefore the water pressure in the diaphragm back chamber 32 decreases.

As a result, the diaphragm 31 is pushed up by the water pressure of the water flowing in from the inflow side passage 22, the diaphragm 31 is separated from the main valve seat 30, and the inflow side passage 22 and the outflow side passage 23 are communicated with each other. become.

Even when the energization is stopped, the magnetic lines of force from the latching magnet plate 3 reach the yoke 1, the pole core 6, the plunger 7, and the latching magnet plate 3, so that the plunger 7 is attracted to the pole core 6. The state is retained.

Next, when a current in the opposite direction to the above is applied to the coil 2a, the lower end of the pole core 6 and the upper end of the plunger 7 have the same polarity and repel each other. Therefore, the plunger 7 is separated in the direction of the valve seat 30. The main valve seat 30 is closed.

In the valve device M that operates in this way, the sealing flange 50 integrally provided with the plunger guide 5 seals the connecting portion between the valve main body and the latching solenoid K, so that the diaphragm back chamber 32 in the diaphragm back chamber 32 is provided. Water can be prevented from leaking to the outside of the plunger guide, and the function as a valve device can be sufficiently maintained.

[0035]

[Effect of the device]

 According to the present invention, the opening end of the plunger guide is integrally provided with the sealing flange for sealing the valve peripheral portion in a watertight manner, so that the number of parts can be reduced and the cost can be reduced. The time and effort can be saved.

Further, by forming an inward bulging portion on the inner peripheral wall of the plunger and making the diameter of the bulging portion smaller than the maximum cross-sectional diameter of the plunger, the plunger and spring in the plunger guide fall out. It can also solve problems such as loss of information.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a valve device according to the present invention.

FIG. 2 is a vertical cross-sectional view of a plunger guide in which a sealing flange is connected.

FIG. 3 is a sectional view taken along line I-I of FIG.

FIG. 4 is a vertical cross-sectional view of a valve device according to a modification.

5 is a cross-sectional view taken along the line II-II in FIG.

[Explanation of symbols]

 K Latching solenoid M Valve device D Diaphragm valve 5 Plunger guide 5b Plunger guide opening end 7 Plunger

Claims (2)

[Scope of utility model registration request] 1. A valve device comprising a valve main body and a latching solenoid connected to the valve body for adjusting the opening and closing of the valve, wherein a plunger guide opening end of the latching solenoid is integrally connected to a sealing flange for sealing the valve peripheral portion in a watertight manner. A valve device that is installed. 2. The valve device according to claim 1, wherein an inner bulging portion is formed on the inner peripheral wall of the plunger, and the diameter of the bulging portion is smaller than the maximum cross-sectional diameter of the plunger.