JPH0579151U - Electric valve for water supply - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain an electric valve for water supply that can close the valve reliably and smoothly. [Composition] In a water supply valve including a valve body biased in a closing direction by a spring and a water supply electric valve including a geared motor which is an actuator for driving the water supply valve, the geared motor has a built-in clutch mechanism and the water supply valve is The urging direction of the spring for pressing the valve body is the same as the direction in which the primary pressure of water presses the valve body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a water supply electric valve, and more particularly to a water supply electric valve using a geared motor as an actuator in which a motor and a gear reduction mechanism are integrated.

[0002]

[Prior Art]

 Conventionally, a water supply electric valve using a geared motor as an actuator is known. This electric motor valve for water supply controls the flow of water by opening and closing the valve hole by moving the valve body by rotating the geared motor in the forward and reverse directions. This is done by pressing from the pressure side to the primary pressure side.

[0003]

[Problems to be solved by the device]

 However, the following problems occur in this electric motor valve for water supply.

When power cannot be supplied to the motor due to a power failure or the like, the valve is held as it is. Therefore, for example, when a power failure occurs while water is being supplied with the valve hole open, The valve hole remains open until power is supplied, and water continues to flow during that time, wasting water.

Since the direction in which the primary pressure of water presses the valve element and the direction in which the valve is biased to the closed state by the spring are opposite, the valve element cannot be smoothly moved in the closing direction. In order to solve this problem, it is possible to reverse the primary side and the secondary side, but in order to improve the water tightness between the geared motor and the primary side, it is necessary to use expensive packing with low sliding resistance. It becomes unnecessary and extra cost is incurred.

An object of the present invention is to provide an electric valve for water supply which solves the above problems and can close the valve hole reliably and promptly.

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in a water supply electric valve according to the present invention, the geared motor has a built-in clutch mechanism, and the water supply valve has a primary pressure of the water acting as the valve body in the biasing direction of the spring for pressing the valve body. It was set in the same direction as the pressing direction.

[0008]

[Action]

 According to the electric motor valve for water supply of the present invention, the clutch mechanism disengages the gear to cut off the torque transmission transmitted from the gear to the valve when de-energized.

Further, since the biasing direction of the spring is the same as the direction in which the primary pressure of water presses the valve, the water pressure and the biasing force of the spring work together to smoothly close the valve. it can.

[0010]

【Example】

 An embodiment of the electric motor valve for water supply according to the present invention will be described below with reference to FIGS. The water supply electric valve 1 includes a geared motor 2 and a water supply valve 3.

The geared motor 2 is configured by integrally connecting a motor 4 and a gear reduction mechanism 5. The output shaft 6 of the motor 4 coaxially supports a worm gear 7 constituting a gear reduction mechanism 5 so as to change the axial direction by 90 ° and obtain a large reduction ratio. The gear reduction mechanism 5 is configured to insert a gear train consisting of a plurality of stages of gears into the worm gear 7 to obtain a further reduction ratio. Therefore, the power generated by the motor 4 that rotates at a high speed is greatly decelerated through the worm gear 7 and the gear trains of a plurality of stages, and at the same time, the rotational torque is increased and an appropriate torque and rotational speed can be given to the gear 10 described later. .

As the gear train having a plurality of stages, for example, those having the following configurations can be used. The worm wheel 8 engaging with the worm gear 7 has a two-stage structure, and the large diameter portion 8b is engaged with the worm gear 7. The small diameter portion 8a is engaged with the large diameter portion 9b of the gear 9 having a two-stage structure. The small-diameter portion 9a of the gear 9 is engaged with the large-diameter portion 10b of the two-stage gear 10 supported coaxially with the worm wheel 8.

Further, the small diameter portion 10a of the gear 10 is engaged with the large diameter portion 11b of the gear 11 having a two-stage structure. Finally, the small diameter portion (pinion) 11a is engaged with the rack gear 12 so that the rotational movement of the small diameter portion (pinion) 11a is converted into a linear movement.

A spring 14 is inserted between the lower portion of the small diameter portion 9a coaxial with the gear 9 and the rear wall 13a of the actuator casing 13, and the spring 14 is advanced to the upper portion of the large diameter portion 9b in the gear 9 direction when energized. The clutch mechanism is configured by disposing the push type plunger 15. Here, 16 is a solenoid coil.

With this clutch mechanism, when energized, the guide sleeve 17 integrated with the plunger 15 is advanced to urge the gear 9 against the spring 14 toward the rear wall 13a to engage the gear train (FIG. 5). At the time of non-energization such as power failure, the guide sleeve 17 integrated with the plunger 15 is retracted from the rear wall 13a by the urging force of the spring 14 to release the gear 9 from the engagement of the gear train (see FIG. 4).

Reference numerals 18 a, 18 b, 19 a, and 19 b denote lead wires for supplying power to the solenoid coil 16 and the motor 4, respectively.

The water supply valve 3 comprises a casing 20 having a T-shaped cross section, and one end of the casing 20 forms an inflow passage 21. The inflow passage 21 functions as a water supply passage, and one end of the inflow passage 21 communicates with a water supply pipe (not shown).

Further, an outflow passage 22 is formed on the side wall of the casing 20. The outflow channel 22 functions as a water distribution channel, and one end thereof communicates with a water distribution pipe (not shown). The other end of the outflow passage 22 communicates with the other end of the inflow passage 21 through the valve hole 23.

Further, the geared motor 2 as an actuator is attached to the flange portion at the other end of the casing 20.

The geared motor 2 has a box-shaped actuator casing 13 having front, rear, left and right walls, and a mounting rod 24 and a valve guide 25, each of which is provided with a valve rod 26 that can move forward and backward at right angles from the rack gear 12. A valve body 27 is pivotally attached to the tip of the.

Here, reference numerals 28 and 29 denote O-rings for sealing water so as to prevent water from leaking from the flange portion at the other end of the casing 13.

A spring 31 is disposed between the lower portion of the valve body 27 and a spring receiver 30 provided at the inlet of the inflow passage 21 of the casing 20 to push the valve body 27 in the valve hole 23 direction (the same direction as the primary pressure). The valve hole 23 is biased so that the valve hole 23 is completely closed.

In this configuration, the valve body 27 is moved by rotating the geared motor 2 forward and backward to open and close the valve hole 23 to control the flow of water.

When a non-energized state such as a power failure occurs, the valve body 27 is smoothly pushed up by closing the valve hole 23 in combination with the disengagement of the spring 21, the primary pressure and the gear train. Then, the inflow path 21 and the outflow path 22 are immediately shut off.

Although the clutch mechanism is constructed coaxially with the gear 9 in this embodiment, it is better to construct the clutch mechanism coaxially with the gear 10 because the load on the cam of the motor can be reduced.

[0026]

[Effect of the device]

 As described above, the electric valve for water supply according to the present invention has the following effects.

When power cannot be supplied to the motor due to a power failure or the like, the gear train is disengaged by the clutch mechanism. Therefore, for example, when the valve is opened and water is supplied, a power failure occurs. Even if it happens, you can quickly close the valve and prevent waste of water.

Further, since the primary pressure of water and the direction in which the spring presses the valve are the same, the valve can be smoothly moved in the closing direction. Further, unlike the case where the primary side and the secondary side are reversed, the water tightness between the geared motor and the primary side is enhanced, so that it is not necessary to use expensive packing, and an inexpensive product can be provided.

[Brief description of drawings]

FIG. 1 is an explanatory perspective view of an electric valve for water supply according to the present invention.

FIG. 2 is a vertical cross-sectional front view of the water supply motorized valve showing an opened state.

FIG. 3 is a vertical cross-sectional front view of the electric water supply valve showing a closed state.

FIG. 4 shows a state in which the clutch mechanism is not engaged.
3-3 line sectional view

5 is a sectional view taken along line 3-3 of FIG. 3 showing a state where the clutch mechanism is engaged.

[Explanation of symbols]

1 ... Electric valve for water supply, 2 ... Geared motor, 3 ... Water supply valve, 4
... motor, 5 ... gear reduction mechanism, 6 ... output shaft, 7 ... worm gear, 8 ... worm wheel, 9 ... gear, 10 ... gear, 11 ... gear, 12 ... rack gear, 13 ... actuator casing, 14 ... spring, 15 ... Plunger, 16
... solenoid coil, 17 ... guide sleeve, 18a,
18b, 19a, 19b ... Leader wire, 20 ... Casing,
21 ... Inflow path, 22 ... Outflow path, 23 ... Valve hole, 24 ... Mounting plate, 25 ... Valve guide, 26 ... Valve rod, 27 ... Valve body, 2
8, 29 ... O-ring, 30 ... Spring receiver, 31 ... Spring.

Continued Front Page (72) Takashi Yoshioka, 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu, Fukuoka Prefecture Totoki Equipment Co., Ltd. (72) Yoshiki Ota 2-1-1, Nakajima, Kitakyushu, Kitakyushu, Fukuoka No. 1 Totoki Equipment Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A water supply valve comprising a valve body biased in a closing direction by a spring, and a water supply electric valve comprising a geared motor which is an actuator for driving the water supply valve, wherein the geared motor has a built-in clutch mechanism. The water supply valve is characterized in that the spring for pressing the valve body is biased in the same direction as the direction in which the primary pressure of water presses the valve body.