JP5504451B2 - Electric valve actuator - Google Patents

Description

  The present invention relates to an electric valve actuator including a motor for opening and closing a valve and an operation unit for inputting an operation of the motor.

  In a plant or the like, a valve is used for each part of the piping. In order to automate the system, an electric valve actuator is used for such a valve. Such an electric valve actuator includes a motor for moving the valve between a fully opened position and a closed position, and an operation conversion mechanism for converting the operation of the motor into a moving operation of the valve (Patent Document). 1).

Utility Model Registration No. 3133718

  In general, such an electric valve actuator can be switched between a direct operation mode for directly operating the electric valve actuator and a remote operation mode for remotely operating the valve. For this reason, in such an electric valve actuator, an operation changeover switch capable of executing a mode selection operation between a direct operation mode for directly operating the electric valve actuator and a remote operation mode for remotely operating the valve is provided. .

  Further, such an electric valve actuator has an open operation mode for opening a valve, a close mode for closing the valve, and a stop mode for stopping the opening / closing operation of the valve in order to manually switch the operation in the direct operation mode described above. An operation changeover switch capable of executing the mode selection operation is also provided.

  In general, the electric valve actuator is often installed under adverse effects such as outdoors where dust or the like is scattered. For this reason, as these switches, an outside air blocking type expensive switch is used.

  By the way, in such an electric valve actuator, it is necessary to change the set value of the operating condition of the valve at the time of installation or after the installation. The setting value is changed by temporarily connecting the electric valve actuator and a dedicated setting device with a connector and operating the setting device. For this reason, not only a dedicated connector or the like is required, but it is also necessary to store this connector inside the electric valve actuator in a state of being cut off from the outside air, which complicates the apparatus configuration. Further, every time the set value is changed, an opening / closing operation for opening / closing the cover of the electric valve actuator body is required.

  The present invention has been made to solve the above-described problems, and provides an electric valve actuator that can easily change a set value without requiring a special connector or its storage mechanism. The purpose is to do.

According to the first aspect of the present invention, there is provided an electric valve actuator including a motor for opening and closing a valve and an operation unit for inputting an operation of the motor, a direct operation mode for directly operating the valve, A first operation changeover switch capable of performing a mode selection operation between a remote operation mode for remote operation and a mode other than the direct operation mode or the remote operation mode, an open operation mode for opening the valve, and a close for closing the valve A second operation changeover switch capable of executing a mode selection operation between a mode and a stop mode for stopping the opening / closing operation of the valve, and a display for displaying a mode selection state by the first operation changeover switch or the second operation changeover switch The second operation changeover switch is capable of executing an input operation other than the mode selection operation, and the first operation changeover switch. In a state other than the direct operation mode or the remote operation mode, an input operation other than the mode selection operation is performed on the second operation switch, so that the second operation switch is By performing the same operation as the mode selection operation, it is possible to execute a set value changing operation for changing the set value of the operating condition of the valve, which is different from the mode selection operation, and The set value of the operating condition is displayed.

According to a second aspect of the present invention, in the first aspect of the present invention, the set value changing operation for changing the set value of the operating condition of the valve includes a setting operation of the fully open position of the valve, and a fully closed position of the valve. Any one of a setting operation for a maximum torque value for the valve opening operation and a setting operation for a maximum torque value for the valve closing operation.

According to the first aspect of the present invention, the first operation changeover switch for selecting the direct operation mode and the remote operation mode, the second operation changeover switch for selecting the open operation mode, the close mode, and the stop mode, and the display The setting value of the operating condition of the valve can be changed using the unit. For this reason, it is possible to easily perform the operation of changing the set value without requiring a special connector or its storage mechanism.

According to the second aspect of the present invention, the setting operation of the fully opened position of the valve, the setting operation of the fully closed position of the valve, the setting operation of the maximum torque value of the opening operation of the valve, and the setting of the maximum torque value of the closing operation of the valve The operation can be easily performed without the need for a special connector or its storage mechanism.

It is a schematic diagram of the electric valve actuator concerning this invention. 3 is a front view of an operation unit 18. FIG. It is explanatory drawing for demonstrating the setting value change operation | movement which changes the setting value of the operating condition of the valve.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view of an electric valve actuator according to the present invention.

  This electric valve actuator is for moving the valve 11 between the fully open position and the closed position, and controls the motor 12, the operation unit 18 for inputting the operation of the motor 12, and the motor 12. A driver 24 and a control unit 25 including a computer that transmits a control signal to the driver 24 based on an operation signal from the operation unit 18 are provided. The control unit 25 is connected to an operation panel 26 for executing a remote operation via the terminal block 19. The driver 24 is connected to the power source 27 via the terminal block 19.

  One end of a rotary shaft 13 that is rotationally driven by the motor 12 is connected via a resolver 14 to a drive sleeve 15 that is an operation conversion mechanism using a screw. For this reason, the rotational driving force of the rotating shaft 13 is converted into a driving force for reciprocating the valve 11 between the fully open position and the closed position. Further, the rotational angle position of the rotating shaft 13 at that time is detected by the resolver 14. Further, the other end of the rotating shaft 13 is connected to the handle wheel 16 via a springless clutch 17. This handle wheel 16 is used when the valve 11 is manually opened and closed.

  FIG. 2 is a front view of the operation unit 18 described above.

  The operation unit 18 includes a first operation changeover switch 21, a second operation changeover switch 22, and a display unit 23. The first operation changeover switch 21 can execute a mode selection operation between a direct operation mode in which the valve is directly operated using the operation unit 18 and a remote operation mode in which the valve is remotely operated using the operation panel 26. Is. The second operation changeover switch 22 can execute a mode selection operation of an opening operation mode for opening the valve 11, a closing mode for closing the valve 11, and a stop mode for stopping the opening / closing operation of the valve 11. And the display part 23 is for displaying the opening degree of the valve 11, the mode selection state by the 1st operation changeover switch 21 or the 2nd operation changeover switch 22, an operation state, a setting value, etc.

  In this electric valve actuator, when the valve is operated remotely, the first operation changeover switch 21 is rotated and switched to the “REMOTE” side. Thereby, the valve is opened and closed by operating the operation panel 26 shown in FIG. 1 through the electric valve actuator.

  On the other hand, in this electric valve actuator, when the valve is directly operated using the operation unit 18, the first operation changeover switch 21 is rotated and switched to the "LOCAL" side. When the second operation changeover switch 22 is rotated and switched to the “open” side, the valve 11 in the valve moves toward the open position, and when switched to the “closed” side, the valve 11 in the valve moves toward the closed position. Moving. If the second operation changeover switch 22 is rotated and switched to the “stop” side, the valve 11 in the valve stops at that position.

  In such an electric valve actuator, it is necessary to change the set value of the operating condition of the valve 11 at the time of installation of the apparatus or after installation. For this reason, in the electric valve actuator according to the present invention, the first operation changeover switch that executes the selection operation of the direct operation mode and the remote operation mode, and the second operation of the selection operation of the opening operation mode, the closing mode, and the stop mode. A set value changing operation for changing the set value of the operating condition of the valve 11 is executed using the operation changeover switch.

  FIG. 3 is an explanatory diagram for explaining the set value changing operation for changing the set value of the operating condition of the valve 11. In this figure, the characters in the rectangle indicate the display contents displayed on the display unit 23 in the operation unit 18.

  In a normal state, the display unit 23 indicates the opening degree of the valve 11. In this state, the first operation changeover switch 21 is rotated and switched to the “OFF” side. Also at this time, the display unit 23 indicates the opening degree of the valve 11. In this state, an input operation other than the mode selection operation is performed on the second operation selector switch 22. More specifically, the second operation changeover switch 22 functions as a push button switch in the stop position in addition to the rotation operation. At this time, the second operation changeover switch 22 is set to 5 in the stop position. Press and hold for more than a second.

  In this way, the electric valve actuator changes the set value of the operating condition of the valve 11 by long pressing the second operation switch 22 while the first operation switch 21 is “OFF”. Shift to the setting mode.

  When the mode is changed to the setting mode, the operating condition to be set is displayed on the display unit 23. This display is displayed using numbers, symbols, or characters representing operating conditions. In this state, by pressing the second operation changeover switch 22 at the stop position, the mode shifts to the operation condition change mode at that time. In this change mode, the display unit 23 displays the set value of the operating condition. If the second operation changeover switch 22 is moved to the “open” side, the set value is increased, and if it is moved to the “closed” side, the set value is decreased. At this time, the changed value after changing the set value is displayed on the display unit 23. Then, this change value is determined by pressing the second operation changeover switch 22 again.

   In the setting mode, after the change value is confirmed by pressing the second operation changeover switch 22, the operating condition to be set by changing the second operation changeover switch to the “open” side or the “closed” side. Can be changed sequentially. The setting value changing operation for changing the setting value of the operating condition of the valve 11 is, for example, the setting operation of the fully opened position of the valve, the setting operation of the fully closed position of the valve, or the setting of the maximum torque value of the opening operation of the valve. The operation is a setting operation of the maximum torque value of the valve closing operation. However, as an operation in which other set values should be changed, other set values such as the rotational speed of the motor 12 may be changed in the same manner.

  As described above, in the electric valve actuator according to the present invention, the first operation changeover switch 21 that selects the direct operation mode and the remote operation mode, and the second operation that selects the open operation mode, the close mode, and the stop mode. The setting value of the operating condition of the valve 11 can be changed using the changeover switch 22 and the display unit 23. For this reason, it is possible to easily perform the operation of changing the set value without requiring a special connector or its storage mechanism. In addition, since it is not necessary to provide a switch dedicated to changing the set value, it is possible to minimize the number of expensive switches.

  In the above-described embodiment, the set value of the operating condition of the valve 11 is changed using the first operation changeover switch 21 and the second operation changeover switch 22, but a single switch is used. Alternatively, three or more switches may be used.

DESCRIPTION OF SYMBOLS 11 Valve 12 Motor 13 Rotating shaft 14 Resolver 18 Operation part 19 Terminal block 21 1st operation changeover switch 22 2nd operation changeover switch 23 Display part 24 Driver 25 Control part 26 Operation panel 27 Power supply

Claims (2)

In an electric valve actuator including a motor for opening and closing a valve and an operation unit for inputting the operation of the motor,
A direct operation mode for directly operating the valve, a remote operation mode for remotely operating the valve, and a first operation changeover switch capable of performing a mode selection operation among the direct operation mode or a mode other than the remote operation mode;
A second operation changeover switch capable of executing a mode selection operation of an opening operation mode for opening the valve, a closing mode for closing the valve, and a stop mode for stopping the opening / closing operation of the valve;
A display unit for displaying a mode selection state by the first operation changeover switch or the second operation changeover switch,
The second operation selector switch can execute an input operation other than the mode selection operation,
In a state where the first operation changeover switch is in a mode other than the direct operation mode or the remote operation mode, by performing an input operation other than the mode selection operation on the second operation changeover switch, When the second operation changeover switch performs the same operation as the mode selection operation, it becomes possible to execute a set value change operation for changing the set value of the operation condition of the valve, which is different from the mode selection operation. ,
The electric valve actuator, wherein the display unit displays a set value of the operating condition at that time. The electric valve actuator according to claim 1 ,
The setting value changing operation for changing the setting value of the operating condition of the valve includes a setting operation for the fully opened position of the valve, a setting operation for the fully closed position of the valve, a setting operation for setting a maximum torque value for the opening operation of the valve, An electric valve actuator including any one of the setting operations for setting the maximum torque value of the closing operation.

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