JPH0115749B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a digital valve remote controller that remotely controls a digital valve by manual operation.

In a conventional analog flow control valve using an electric motor, the opening degree of the valve is changed remotely using a remote controller as shown in FIG. 1, for example.

In FIG. 1, reference numeral 1 denotes a remote controller, which has a built-in power supply 2 and a potentiometer 3, and operates the potentiometer 3 while connected to a signal line to a power amplifier 4, which serves as a drive circuit for an analog flow rate control valve 5. However, the opening degree is adjusted to the required degree by driving the electric motor provided in the analog type flow control valve 5.

However, remote controllers for conventional analog flow control valves suffer from a lot of drift due to temperature and changes over time, and are also more difficult to transmit than remote controllers by transmitting minute signal voltages to power amplifiers that are far away. Because it is a transmitter, it is easily affected by noise, making it difficult to adjust the flow rate with high precision.Furthermore, since a potentiometer is used for the remote controller, its mechanical durability is limited. There was also a problem in that it was expensive.

The present invention has been made in view of these conventional problems, and it is possible to control the flow rate or pressure by remotely operating a so-called digital valve using a pulse motor as a drive source by sending out a pulse signal by manual operation. An object of the present invention is to provide a digital valve remote controller that enables high flow rate or pressure control, is resistant to noise, and is inexpensive in cost.

To achieve this objective, the present invention provides a first manual switch that outputs a pulse signal to the portable unit to drive the pulse motor driver of the digital valve one step clockwise in each switch operation;
Counterclockwise direction to pulse motor driver 1
It is equipped with a second manual switch that outputs a step pulse signal every time the switch is operated, and a reset switch that outputs a reset signal that restores the digital valve to the fully closed position. The system is designed to control digital valves.

Embodiments of the present invention will be described below based on the drawings.

FIG. 2 is a circuit block diagram showing one embodiment of the present invention. First, to explain the configuration, 10 is a remote controller, which includes a power supply 11, a first manual switch 12 that generates a CW pulse for clockwise driving the pulse motor of the digital valve, and a pulse motor of the digital valve. and a second manual switch 13 that generates a CCW pulse to rotate the digital valve counterclockwise, and a reset switch 14 that generates a reset pulse to restore the digital valve to the fully closed position. 12 to 14 are push button switches with a non-locking structure, and each time the switch is operated,
Outputs one CW, CCW or reset pulse. Of course, the pulse outputs generated by operating the switches 12 to 14 are output as the power supply voltage from the power supply 11. In addition, the remote controller 10 includes a power supply 11 and a manual switch 1.
Since it has an extremely simple structure consisting of 2, 13 and a reset switch 14, it is small enough to be held in the palm of your hand, and is used by connecting it to a control panel with a connector.

15 is a pulse motor driver, which outputs excitation current for the pulse motor in response to CW or CCW pulses from the remote controller 10, and continuously outputs CCW pulses forcibly returning the pulse motor to the fully closed position of the valve for reset pulses. output.

Reference numeral 16 denotes a digital valve for controlling the flow rate, which includes a built-in pulse motor 17 that is rotated in steps by a pulse motor driver 15, and the flow rate is adjusted by changing the opening degree of the variable throttle 18 with the step rotation of the pulse motor 17. There is.

Next, to explain the operation of the embodiment shown in FIG. 2, when remotely controlling the digital valve 16 for flow rate control by the remote controller 10, the control panel, into which the signal line from the pulse motor driver 15 is connected, is connected as a portable unit. For example, when the provided remote controller 10 is connected to the connector and the digital valve 16 for flow rate control in the fully closed position is opened, the manual switch 12 is turned on a number of times corresponding to the set opening degree, and thereby the manual switch 12 is turned on. One CW pulse is outputted to the pulse motor driver 15 each time the flow rate control digital valve 16 is rotated, and the pulse motor 17 of the digital valve 16 for flow rate control is rotationally driven in the direction of opening the variable diaphragm 18 one step at a time. In addition, when reducing the flow rate of the flow rate control digital valve 16 at a predetermined opening degree, if the manual switch 13 of the remote controller 10 is turned on the required number of times, the CCW is turned on for each switch operation.
Pulse motor driver 15 with one pulse at a time
The pulse motor 17 of the digital valve for flow rate control is rotated one step at a time in the direction of closing the variable throttle 18.

Furthermore, when an emergency stop is required, when the reset switch 14 of the remote controller 10 is turned on, the pulse motor driver 15 energizes the pulse motor 17 of the digital valve 16 for flow rate control to close the variable throttle 18. Pulses (CCW pulses) are continuously output, and by operating the reset switch 14 once, the digital valve 16 for flow control can be operated to the fully closed position and an emergency stop can be performed.

FIG. 3 is a circuit block diagram showing another embodiment of the present invention, and this embodiment is characterized in that the remote controller is provided with means for displaying the opening degree of the digital valve.

That is, the remote controller 10 is provided with an up-down counter 19, and the count-up terminal CU of the up-down counter 19 has a CW signal.
The output of a manual switch 12 that generates a pulse is connected to the countdown terminal CD, the output of a manual switch 13 that generates a CCW pulse is connected to the countdown terminal CD, and the reset switch 14 that outputs a reset pulse is connected to the clear terminal CLR. The output is connected, and the count output of the up-down counter 19 is supplied to a display 20 so that the opening degree of the digital valve 16 for flow rate control can be displayed numerically. Note that the other configurations are the same as the embodiment shown in FIG.

According to the embodiment shown in FIG. 3, the CW or CCW pulses generated by operating the manual switch 12 or 13 of the remote controller 10 are counted by the up-down counter 12 and displayed numerically on the display 20. The user can operate the manual switch 12 or 13 while looking at the display on the device 20 to adjust the opening degree of the digital valve 16 for flow rate control to the required degree, and excellent operability can be obtained. In addition, reset switch 1 is also available for emergency stop.
When 4 is operated, the up-down counter 19 is cleared and the display on the display 20 returns to all zeros.

In addition, although the above embodiment took a digital valve for flow control as an example, a pressure control having a structure in which a pulse motor is similarly used to change the spring load that determines the relief setting pressure of the relief valve is also applicable. The present invention can also be applied to digital valves for use as is.

Next, to explain the effects of the present invention, the remote controller has power supply and control pulses in the CW direction,
Since it is only necessary to provide three manual switches that output the control pulse in the CCW direction and the reset pulse that returns the digital valve to the fully closed position, the unit configuration is extremely simple and can be easily placed in the palm of your hand. It can be made smaller and lighter, and since the control signal from the controller is a pulse signal, it is not affected by noise even if the digital valve is far from the pulse motor driver, and there is no drift due to temperature or changes over time. No effect.

Furthermore, the control amount of the digital valve can be determined by the number of operations of the manual switch provided on the remote controller, and extremely high operability is achieved by providing the control unit with a display that displays the count value of control pulses. can be obtained.

[Brief explanation of drawings]

Fig. 1 is a circuit block diagram showing an example of a remote controller unit for a conventional analog type flow control valve, Fig. 2 is a circuit block diagram showing an embodiment of the present invention, and Fig. 3 is a circuit block diagram showing an example of the present invention. FIG. 3 is a circuit block diagram showing another embodiment of the invention. 10: Remote controller, 11: Power supply, 1
2: First manual switch, 13: Second manual switch, 14: Reset switch, 15: Pulse motor driver, 16: Digital valve for flow rate control,
17: Pulse motor, 18: Variable aperture, 19: Up/down counter, 20: Display.

Claims (1)

[Claims] 1. A power source, a first manual switch that outputs a signal instructing the pulse motor driver of the digital valve to rotate one step in the clockwise direction every time the switch is operated, and a first manual switch that outputs a signal instructing the driver to rotate one step in the counterclockwise direction. A second manual switch that outputs a signal instructing the rotation of the digital valve every time the switch is operated, and a reset switch that outputs a reset signal to the driver to restore the digital valve to the fully closed position are built into the portable unit. A digital valve remote controller characterized in that the digital valve is remotely operated by connecting a signal line to a driver.