JPH02245588A - Motor valve and control device thereof - Google Patents

Abstract

PURPOSE:To avoid the enlargement of a device which closes automatically at the interruption time and requires the momentarily large current at the reset time after the interruption by closing a valve body instantly with an energizing means at the interruption time to stop the water, and moving a driving material to a position of the attracting material with a motor to perform the attraction at the reset time after the interruption. CONSTITUTION:At the time of controlling with a micro computer 18, after looking at the signal of an interruption detecting means for judging the existence of the interruption, when the interruption does not exist, a motor driving circuit 17 is controlled by the ordinary motor control, namely, on the basis of the input signal of a valve open degree setting unit 16 to maintain the valve open degree at the preset value. On the other hand, when the interruption exists, the motor is controlled to a cut-off side, and a driving material is securely contacted to an attracting material to be attracted till a closing position, and the control is moved to the ordinary motor control. The self-opening of the attracting material in overcoming the hydraulic pressure is eliminated and the attracting material is opened by a motor having a strong force because of the control that the driving material falls down to the position of the attracting material to perform the attraction at the reset time after the interruption after closing the valve body at the interruption time. Consequently, only the micro current required for maintenance of the attraction is flowed in the coil, and the excessive power consumption is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a motor valve that continuously opens and closes the valve using a motor to adjust the flow rate of fluid.

Prior Art (Prior Art 1) A conventional motor valve of this type is shown in FIG. This is used, for example, in a water circuit, and has an inlet channel 1, an outlet channel 2, and a valve seat 3 and a valve body 4 made of rubber between them.

The valve body 4 was connected to a drive shaft 5, and the drive shaft was driven by a motor 6 through a gear 7, and the valve seat 3 and the valve body 4 were opened and closed by changing the degree of opening to adjust the flow rate. .

(Prior art 2) Therefore, another conventional example for solving the above problem is shown in FIG. 7. This is the one in FIG. 6 with a spiral spring 8 added. The returning force is used to move the drive shaft 5 and close the valve body 6.

(Conventional technology 3) Another conventional example for solving the problem of conventional technology (1) is shown in Fig. 8. This is a solenoid valve 9 connected in series as a water circuit to the one in Fig. 6. In the event of a power outage, the solenoid valve 9 closes to stop the water supply.

Problem to be Solved by the Invention (Problem to be Solved by the Invention 1) With the above configuration, it is easier to obtain a larger force for opening and closing than a solenoid type valve, and therefore it is suitable as a valve for water with high pressure. However, if there is a power outage while water is flowing, the valve body 4 remains in the open position, causing the problem that water is allowed to flow.

(Problem to be Solved by the Invention 2) However, in the above configuration, the drive shaft 5 overcomes the closing force of the spiral spring 8 in addition to the force required for normal opening/closing operations.
As a result, as shown in FIG. 7, both the motor 6 and the gear 7 are required to be large in size, resulting in an increase in the overall size and cost.

(The invention attempts to solve it!Ja3) However, even in the above configuration, the overall shape becomes large,
However, since the water circuit becomes complicated, there is a problem in that the water circuit resistance increases.

The present invention solves these conventional problems, and uses a motor that can handle the force required for normal opening/closing operations, while automatically and reliably shutting down in the event of a power outage.Moreover, it is not large in size and has a simple water circuit. The first objective is to obtain a motor valve that has a small water circuit resistance due to its shape.

The second purpose is to obtain a motor valve control device that always consumes low power by giving a special movement to the motor when the power is restored.

The third object is to provide a motor valve control device that requires only a momentary large current only when the power is restored, and that normally consumes little power.

Means for Solving the Problems In order to achieve the above-mentioned first object, the present invention provides an adsorbent that is coupled to a valve body and is made of a magnetic material, and an urging member that urges the adsorbent in a direction in which the valve body is closed. The valve body is equipped with an actuator, a coil, and a drive body that is excited by the coil and attracts the attracting body, and opens and closes the valve body using a motor in the attracted state.

Further, in order to achieve the second object, the present invention includes a power failure detection means and a return control means for controlling the motor to urge the driving body to the valve body closing position using a signal from the power failure detection means when the power failure returns. It is equipped with a motor valve control device.

Furthermore, in order to achieve the third object, the present invention includes a power failure detection means, and when the power is restored, a current is applied to the coil according to a signal from the power failure detection means to cause the attracting body to be attracted to the driving body, and thereafter the attraction of the attracting body is maintained. The motor valve control device includes an adsorption control means that reduces the current value to a value that is equal to or less than the current value.

Operation The present invention has the above-mentioned configuration, so that in the normal state where the driving body and the absorbing body are attracted, the configuration is the same as the conventional motor valve, and the overall shape does not change much except for the addition of a small coil, and the water circuit The valve is also simple and has low water circuit resistance, like the conventional one, but in the event of a power outage, the adsorption between the drive body and the adsorption body is released, and the valve body can be immediately closed by the biasing means to stop the water flow. It is.

In addition, since the recovery control means uses a motor to move the drive body to the position where the suction body is located when the power is restored, and performs suction, it is sufficient to always supply a small amount of current necessary to maintain suction to the coil. , which does not require excessive power consumption either transiently or normally.

Furthermore, the adsorption control means has a quick opening operation when the power is restored, and requires an excessive amount of current to attract the adsorbent to the driving body only at the instant when the power is restored. It does not require excessive power consumption.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

In FIG. 1, 10 is an adsorbent made of a magnetic material coupled to the valve body 4, 11 is an urging means for urging the adsorbent 10 in the upward direction of closing the valve body 4, 12 is a coil, and 13 is a coil. It is a driving body that is energized by the motor 6 to attract the attracting body 10 and to continuously open and close the space between the valve seat 3 and the valve body 4 in the attracted state.

Next, the operation of the configuration of this embodiment will be explained. The adsorbing body 10 and the driving body 13 attract each other by energization of the coil 12, and are driven together by the energization of the motor 6 to change the opening degree of the valve body 4 and adjust the flow rate. At this time, the magnetic gap between the attracting body 10 and the driving body 13 is zero, so even if the current flowing through the coil 12 is minute, a large attracting force acts.
Coil 1, which will not lose its adsorption due to water pressure when opening/closing.
Current always flows through 2 unless there is a power outage. Now, if there is a power outage, the current in the coil 12 becomes zero, so the adsorbent I
The adsorption between O and the driving body 13 is released, and regardless of the position of the driving body 13, the adsorbing body IO is urged by the urging means 11 to close the valve body 4 and stop the water flow.

As you can see from the above explanation, by simply dividing the drive shaft of a conventional motor valve into two parts and adding a spring and a small coil as a biasing means, the water circuit can be used without changing the overall size. This makes it possible to guarantee a reliable deadline in the event of a power outage without changing anything at all.

Next, an embodiment of a motor valve control device will be described.

In FIGS. 2 and 3, 14 is a power supply, 15 is a power failure detection means, 16 is a valve opening setting device, ]7 is a motor drive circuit that drives the motor 6, and 18 is an input from the valve opening setting device 16. The motor drive circuit 17 is controlled based on the power failure detection means 1, which maintains the valve opening at the set value and has a return control means.
This is a microcomputer that causes the motor 6 to perform power failure recovery control yJ using the signal No. 5.

As shown in FIG. 3, the control of the microcomputer 18 starts at step SO, and first, at step S1, the signal from the power outage detection means is checked to determine whether there is a power outage. If there is no power outage, in step S4 the motor drive circuit 17 is controlled based on the input of the valve opening setting device 16 to maintain the valve opening at the set value.However, if there is a power outage, In step S2, the motor is controlled to the closing side, and in step S3, the driving body is brought into contact with and attracted to the suction body to ensure the closing position. Thereafter, the routine moves to normal motor control in step S4.

As can be seen from the above explanation, after the valve body closes during a power outage, when the power is restored, the drive body descends to the position where the adsorbent is located and performs adsorption, so the adsorbent There is no need to overcome water pressure to open the door yourself; instead, it is opened by a powerful motor. Therefore, a very small current of several milliamperes necessary to maintain suction can be constantly passed through the coil, and there is no need to consume excessive power either transiently or normally.

Furthermore, other embodiments of the motor valve control device are shown in FIGS. 4 and 5.
This will be explained based on the diagram.

The difference in FIG. 4 from FIG. 2 of the previous embodiment is that a microcomputer 19 uses a signal from a power outage detection means 15 to instantly apply a large current to the coil 12 via a transistor 20 when the power outage is restored, turning the adsorbent into a driver. It has an adsorption control means that causes the adsorbent to adsorb and then reduces the current value to a value that maintains the adsorption of the adsorbent.

As shown in FIG. 5, the control of the microcomputer 19 starts at step SO and first checks the signal from the power outage detection means in step S1 to determine whether there is a power outage. If there is no power outage, in step S4, the motor drive circuit 17 is controlled based on normal motor control, that is, based on the human power of the valve opening setting device 16, and the valve opening is maintained at the set value. However, if there is a power outage, a large current is applied to the coil 12 in step S5, and the attracting body is attracted to the driving body regardless of the position of the driving body.

Step S6 is the time required for the adsorbent to adsorb to the driver;
This is a timer for ensuring a large current and ensuring reliable adsorption, and is set to a length of several hundred milliseconds.

Thereafter, the routine moves to normal motor control in step S4.

As you can see from the above explanation, after the valve body closes during a power outage, a large current is instantaneously passed through the coil when the power returns, and then a small current is passed through the coil, so the opening operation is quick when the power returns. , and usually does not require excessive power consumption.

Effects of the Invention As described above, the present invention provides an adsorbent that is coupled to a valve body and is made of a magnetic material, a biasing means that biases the adsorbent in a direction in which the valve body is closed to a valve seat, a coil, and a coil. This system has a driver that is excited to attract the adsorbent and drives the valve seat and valve disc to open and close in the adsorbed state, and a motor that energizes the driver. The water can be stopped by closing the valve, and under normal conditions it can perform the same operations as conventional motor valves, the overall size is not much different, and the water circuit is as simple as before, with low water circuit resistance.

The present invention also provides a power failure detection means and a return control n which controls a motor to urge the drive body to the closing position of the valve body based on a signal from the power failure detection means when the power failure returns, and causes the drive body to adsorb the adsorption body.
Therefore, it is sufficient to constantly flow a small amount of current necessary to maintain attraction in the coil, and there is no need for excessive power consumption either transiently or normally.

Furthermore, the present invention includes a power failure detection means and an adsorption control means that causes a current to flow through a coil in response to a signal from the power failure detection means when the power is restored to cause the adsorbent to adsorb to the drive body, and then reduces the current value to a value that maintains the adsorption of the adsorbent. Therefore, the opening operation is quick when the power is restored, and usually does not require excessive power consumption.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a motor valve in an embodiment of the present invention;
Fig. 2 is a circuit block diagram of a motor valve control device showing one embodiment of the present invention, Fig. 3 is a flow diagram of a micro combinator of the same device, and Fig. 4 shows another embodiment of the present invention. FIG. 5 is a circuit block diagram of a motor valve control device, FIG. 5 is a flow diagram of a microcomputer of the same device, and FIGS. 6, 7, and 8 are sectional views of conventional examples. 3... Valve seat, 4... Valve body, 6...
... Motor, 10 ... Adsorption body, 11 ...
・Biasing means, 12... Coil, 13...
- Drive body, 15... Power outage detection means, 17...
...Motor drive circuit, 18...Microcomputer having return control means, 19...Microcomputer having suction control means, 20...
...Transistor. Figure 3 - Valve seat 4 - 41 integrated 6 - 7 - G 1 o - 1 suction layer 11 - mounting means 12 - ° - Carp 7 and f3 - 11 drive I1 (JiZ Figure 15 ° - Power outage detection means /7-Mo-gu Rundomenro 1B・-) Micro Combiator 13 Figure tS-11/fII-Denken Yaro Tekyo f'l-17-DaN! , Migro Combiator 26-) Ransisda, which cleans 1m of filth on Dotekuma 19-II

Claims (3)

[Claims] (1) a valve seat provided in a flow path, a valve body provided opposite to the valve seat, and an adsorbent made of a magnetic material coupled to the valve body;
a biasing means for urging the adsorbent in a direction in which the valve body is closed by the valve seat; a coil; and a coil that is excited by the coil to attract the adsorbent and, in the adsorbed state, the valve seat and the valve body. A motor valve that has a driving body that is driven to open and close a gap, and a motor that energizes the driving body. (2) A motor having a power failure detection means, and a return control means that controls the motor to urge the drive body to the closing position of the valve body based on the signal from the power failure detection means when the power failure returns, and causes the drive body to attract the adsorbent body. Valve control device. (3) a power outage detection means; and an adsorption control means for causing a current to flow through a coil in response to a signal from the power outage detection means to adsorb the adsorbent to the drive body when the power is restored, and then reducing the current value to a value that maintains the adsorption of the adsorbent. A motor valve control device having: