KR920006591Y1 - Electromotive valve - Google Patents

Abstract

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Description

Motorized valve

The drawings illustrate embodiments of the present invention.

1 is a side view of the electric valve of the present invention.

Figure 2 is a longitudinal side view of the drive portion of the same electric valve.

3 is a perspective view showing the overall structure of the driving unit.

4 is a longitudinal side view showing the relationship between the spring and the electronic device.

* Explanation of symbols for main parts of the drawings

1 valve 2 output shaft

3: reversible rotation motor 4: internal gear

5, 6: gear 7: plate

8: Manual spring 9: Electronic device

The present invention is an electric valve that rotates the valve element of the valve by driving the reversible rotary motor to open and close the valve, which automatically opens or closes the valve when power supply control is not possible due to a power failure. It relates to an electric valve with a built-in mechanism.

Background Art Conventionally, there are electric valves in which a valve body of a valve is rotated by driving a motor to open and close the valve. Generally, this type of electric valve has a flow path of a valve body when the motor is stopped. The rotating shaft of the motor is fixed so as to be incapable of rotation by a brake mechanism provided inside the motor so as not to rotate by the pressure of the fluid passing through the fan.

Therefore, when the power supply to the motor is disabled due to a power failure or an accident and the opening / closing control of the valve becomes impossible, the valve body of the valve remains in the state before the breaking of energization. There was a risk that the tank would overflow.

For this reason, in the past, the supervisor closed the valves manually at the same time as the accident occurred, but it was almost impossible to control a plurality of valves in a short time, and there was no certainty because they were forgotten and not closed.

Thus, a device was designed to automatically close the valve by switching by an electromagnetic clutch, using the restoring force of the spring manually wound in advance. Since there is a risk of throwing away and winding up, and an expensive electronic clutch is used, there is a drawback that the manufacturing cost becomes extremely expensive, and it is not practically used at present.

However, the present invention provides an electric valve with a built-in emergency opening and closing device that can be practically solved by eliminating the above-mentioned drawbacks, and the output shaft 2 connected to the rotating shaft of the valve body of the valve 1 has the In a motor-driven valve which rotates about 90 degrees forward and backward by driving to open and close the valve 1, an internal gear 4 that rotates independently of the same output shaft by rotation of the motor 3 on the output shaft 2. ) Is rotatably supported so that the inner teeth (4 ₁ ... 4 ₁ ) of the inner gear (4) and the outer teeth (5 ₁ ) of the gear (5) supported on the output shaft (2) to rotate independently of the same output shaft. ... winding wound by the rotation of ₅₁₎ for the mesh with gear 6, meet axis ₍₆₁₎ by a plate (7 rotatably supported) at the same time and the output shaft 2 goodness on, is air (6) Spring 8 is provided, and the spring spring 8 is prevented from rotating when energized. It is characterized by a structure composed by installing a magnetic brake (9) to turn off before inhibition.

The inner spring 8 is fitted with an inner end piece of the slit drilled by the gear 8 ₁ engaged with the gear 5 and the integral shaft 8 ₂ , and the outer end piece is a flange portion of the valve 1. It is fixed to a part of the casing A which is fixed to the casing and covers the whole apparatus, and is wound by the rotation of the gear 5, and it is provided in plurality as needed in order to increase a restoring force.

In addition, the electromagnetic brake 9 is a thin plate (9 ₂ ) fixed to the rotary shaft (9 ₁ ) and the upper end of the rotary shaft. It consists of a ring-shaped adsorption plate 9 ₃ fixed to the thin plate 9 ₂ and an electromagnet 9 ₄ which self-adheses the adsorption plate, and the adsorption plate is formed by excitation of the electromagnet 9 ₄ . (9 ₃ ) is adsorbed by the electromagnet (9 ₄ ), the rotation of the rotating shaft (9 ₁ ) is prevented, and is housed in the casing together with the reduction gear. In addition, the relationship between the mainspring 8 and the electromagnetic brake 9 is such that the reduction gear is connected to the gear 8 _2a and the rotation shaft 9 ₁ of the electromagnetic brake 9 at the rotational axis 8 ₂ of the main spring 8. The gear 9 _1c attached to the rotary shaft 9 _1a through the one-way clutch 9 _1b is engaged, and the rotary shaft 8 _{2 of the} spring 8 is wound in the direction in which the spring 8 is wound. At the time of rotation, the gear 9 _1c is idling by the action of the one-way clutch 9 _1b , and is configured to rotate integrally with the rotation shaft 9 _1a at the time of reverse rotation.

Moreover, the lower end of the output shaft 2 is comprised so that the upper end of the rotating shaft (not shown) of the valve body of the valve 1 may fit in a hole, and the rotating shaft of a valve body rotates integrally by the rotation of the output shaft 2, The stopper 11 is configured to be capable of forward and reverse rotation within the range of 90 degrees from the outside of the lower end of the cam 10 and the casing A fixed to the lower end bar of the output shaft 2.

In the figure, 12 and 13 are limit switches for detecting the rotation of the output shaft 2 and transmitting whether the valve 1 is open or closed by an electric signal, and the cam plates 14 and 15 integrally fixed to the output shaft 2. As a result, the contacts of the limit switches 12 and 13 are turned on and off. 16 is a limit switch which rotates the rotary shaft of the spring 8, and detects that the spring is fully wound, and the electromagnet 9 ₄ of the electromagnetic brake 9 is energized by the ON of this limit switch. Moreover, it acts to cut | off the electricity supply to the motor 3 mentioned later.

In addition, 3 is a gear integrated with the rotating shaft of the motor 3, and meshes with the outer peripheral teeth 4 ₂ ... 4 ₂ of the inner gear 4 via the reduction gear, The deceleration mechanism is configured by rotating the inner gear 4.

Next, according to the above-described configuration of the present invention, the case of closing the valve at the time of power failure will be described with respect to the illustrated embodiment of the electric valve of the present invention.

That is, when the motor 3 is rotated in the direction in which the valve 1 is closed in the state in which the valve 1 is closed, the inner gear 4 is independent of the output shaft 2 and starts to rotate freely. The gear 6 meshing with the inner teeth 4 ₁ ... 4 ₁ also rotates, but the plate 7 on which the gear 6 is rotatably supported is integral with the output shaft 2 so that the gear 6 ) Rotate while keeping this position.

By the rotation of this gear 6, the gear 5 engaged with it and the gear 8 ₁ engaged with the gear 5 rotate, and the spring spring 8 begins to be wound. When the self-winding spring 8 is sufficiently wound, the cam plate 16 ₁ , which rotates through the gear on the rotary shaft 8 ₂ , closes the contact point of the limit switch 16, and cuts off the power supply to the motor 3. The electromagnet 9 ₄ of the electromagnetic brake 9 is energized to prevent rotation of the rotary shaft 9 ₁ , that is, rotation of the rotary shaft 8 ₂ of the spring spring 8.

As a result, the mainspring spring 8 is fixed while being wound, i.

Engaging when the Motor 3 in this state energized in the direction in which the valve (1) open inside the gear 4 is rotated in the opposite direction, the inner circumferential fit the teeth ₍₄₁ ... _41), the gear (6) Although the gear 5 engaged with the gear 6 is fixed as described above, the gear 6 makes a so-called planetary motion that rotates while rotating around the gear 5. Therefore, since the plate 7 rotates by being pushed by the axis _6l of the gear 6 and rotates the output shaft 2 integrated therewith, the valve body of the valve 1 rotates in the opening direction.

When the valve body is opened by the rotation of the output shaft 2 by 90 degrees, further rotation is prevented by the action of the stopper 11, the contact of the limit switch 12 is turned off, and the energization to the motor 3 is cut off. The rotation of the motor 3 stops.

Thus, when the valve 1 is to be closed, the inner gear 4 and the gear 6 rotate in reverse direction when the motor 3 is energized in the direction in which the valve 11 is closed and the gear 3 ₁ is rotated. , The gear 6 is planetary in the opposite direction to the above direction, so that the plate 7 is rotated in the reverse direction, the output shaft 2 is rotated 90 degrees to close the valve body of the valve (1). As soon as the valve body is closed, the contact of the limit switch 13 is turned off, the energization to the motor 3 is cut off, and the rotation of the motor 3 is stopped.

Thereafter, the operation of the motor 3 is repeated to control the opening and closing of the valve 1.

Therefore, in the open state of the valve 1, when an accident such as a power failure that cannot control the energization of the motor 3 occurs, energization of the electromagnetic brake 9 to the electromagnet 9 ₄ is also cut off. Since the adsorption plate 9 ₃ , which has been attached to the electromagnet 9 ₄ , is free to fall, the rotating shaft 8 ₂ of the mainspring 8 is also free, which causes the winding spring 8 to be wound by the above operation. a restoring force, i.e., the direction opposite to the sense of the winding spring direction by the pulley being force axis of rotation _(82), that the gear (5) is so rotated, mesh with the gear (6) fit to the outer peripheral teeth ₍₅₁ ... ₅₁₎ However, when the rotation of the motor 3 is stopped, the rotation of the motor 3, that is, the gear 31 is fixed, and the inner gear 4 is also fixed, as described above. 6 is engaged with the inner peripheral teeth (4 ₁ ... 4 ₁ ) and is driven, and is pushed by the axis (6) plate, That is, the output shaft 2 rotates in the closing direction of the valve 1, and the valve body is automatically closed.

After the resumption of the energization, the spring spring 8 is wound by the above operation, to prepare for the next accident such as an outage.

In the present embodiment, a case in which the valve is closed in an emergency such as a power failure has been described. However, when the valve is used for a sprinkler valve or when power supply control is impossible such as a power failure, the valve must be opened. The attachment position of the cam of the stopper may be changed so as to wind the spring in opening.

As described above, according to the electric valve of the present invention, when the winding spring is wound by using a motor for opening and closing the valve, when the power supply control to the motor such as power failure is disabled, the spring spring is removed. Since the valve body of the valve is closed or opened repeatedly, it does not require the troublesome work of manually winding the spring and does not require an expensive electromagnetic clutch. It can provide.

In this embodiment, the rotation stopping action when the spring is energized is performed by electromagnetic brake, but the rotation in the repetitive direction is prevented by the engagement of the ratchet wheel and the ratchet click. The engagement may be released by the action of the solenoid at the time of interruption of energization, and the structure may be any structure as long as it is an electronic device which performs the rotation stop action of the spring at the time of interruption of energization.

In addition, increasing the number of gears 6 rotatably supported by the plate 7 results in a smoother operation.

Claims (1)

The output shaft 2 connected to the rotary shaft of the valve body of the valve 1 is rotated forward and reverse 90 degrees by the drive of the reversible rotary motor 3 to the electric valve 1 which opens and closes the barrel 1. according, to within a possible gear 4 rotates supported to rotate independently of the rotation is the same output shaft by a Motor (3) to said output shaft (2), inner teeth ₍₄₁ of the same within the gear 4 rotatable ... ₄₁₎ and the output side (2) to the same output with the outer teeth ₍₅₁ ... engaging gear 6 match ₅₁₎ of the gear 5 is supported has to be independent of the axis of rotation ₍₆₁₎ A mechanism for fixing the plate 7 securely supported to the output shaft 2 and providing a spring spring 8 wound by the rotation of the gear 6 to prevent rotation of the manual spring spring 8. And an electronic device (9) provided with a mechanism for releasing the rotation stopping action of the spring spring at the time of interruption of energization.