JP7107694B2 - Opening indicator for electric valve drive - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening degree indicator for a motor-operated valve driving device that drives valves installed in various plants such as thermal power plants.

2. Description of the Related Art Conventionally, a motor-operated valve drive device is normally or semi-standardly provided with an opening degree indicator for displaying the opening degree of a valve to be driven. There are various types of opening degree indicators, but a simple one mechanically displays the degree of opening by means of a pointer and a dial that are interlocked with the opening and closing operations of the valve.

Today, however, motor-operated valve drive devices are becoming smaller and lighter, and a display unit called a lamp station integrated with the main body of the motor-operated valve drive device is provided to display the valve opening state along with the operation switch. A lamp is provided. In the lamp station, three states other than fully open, fully closed, and fully open/fully closed are displayed as the valve opening status by lighting three separate lamps (see Patent Document 1). Further, when an excessive load is applied to the motor-operated valve driving device and an alarm is generated by the torque detector, there is also an alarm lamp different from the three lamps described above.

Furthermore, in the electronically controlled motor-operated valve drive device, which has further reduced the size and weight of the motor-operated valve drive device, the operation part called the control panel is equipped with a liquid crystal display, LEDs and operation switches, and the valve opening is performed on it. In addition to temperature status and operating status, there are also devices that display alarms, failure information, and the like on a single liquid crystal display in numerical values and characters.

JP-A-2006-29428

In the daily monitoring work of a plant in which a large number of motor-operated valve driving devices are installed, it is indispensable to check the opening state of the valves on site. The same applies to the case where the valve opening state is detected and transmitted by a sensor, and the opening is displayed on an opening indicator provided in a remote control room. This is because the operation of confirming that the remotely displayed degree of opening matches the actual degree of valve opening is essential in a plant that requires high operational reliability.

Here, in the lamp station according to the prior art, the opening state of the valve was displayed only in three states, namely, fully open, fully closed, and fully open/closed. Therefore, it was difficult to easily check the valve opening. On the other hand, in order to read the valve opening of the liquid crystal display etc. provided on the control panel, it is necessary to approach the motor-operated valve driving device to a distance of 1 to 2 m from the side of the machine, and from almost the front of the opening indicator. There is a problem that correct reading is not possible without seeing.

In addition, the environment in which the motor-operated valve drive device is installed varies, and it is sometimes installed in a high place and at the back of a complicated piping line. There are many places where it is difficult to approach the machine side of the motor-operated valve driving device within a distance of 1 to 2 m. In addition, some parts of the piping line have a high temperature, and there are some parts where there is a problem in ensuring the safety of the observer when approaching a distance of 1 to 2 m from the machine side of the motor-operated valve drive device. Furthermore, it takes a considerable amount of time to go up and down stairs to reach high places. In addition, there are cases where it is necessary to monitor a motor-operated valve driving device installed in a dark space in a building or outdoors at night.

The present invention has been devised to solve the above-described problems of the opening degree indicator of the conventional motor-operated valve driving device. An object of the present invention is to provide an opening degree indicator for a motor-operated valve driving device that allows the degree of opening to be visually recognized.

In addition, we provide an opening indicator for a motor-operated valve drive that enables safe and accurate reading of the valve opening even if the motor-operated valve drive is installed in a location where it is difficult for observers to approach the machine. intended to

According to a first aspect of the present invention, there is provided an opening degree indicator for a motor-operated valve driving device, wherein the intermediate opening degree of the valve is indicated step by step by the number of lighting of a plurality of multicolor indicators, and during the opening and closing operation of the valve, the A plurality of multi-color indicators are flashed in different colors during the opening operation and the closing operation, and when an alarm of the motor-operated valve driving device is generated, the plurality of multi-color indicators are flashed in a color different from the color during the opening and closing operation. and the intermediate opening degree of the valve at the time of alarm generation is displayed step by step, and the plurality of multi-color indicators are arranged in a ring .

According to a second aspect of the present invention, in the opening degree indicator for a motor-operated valve driving device according to claim 1, when the valve is in a fully closed state and an alarm is generated in the motor-operated valve driving device, one of the plurality of multicolor indicators Only one flashes, and all of the plurality of multicolor indicators flash when the valve is in a fully open state and an alarm is generated in the electric valve driving device.

According to a third aspect of the present invention, there is provided an opening degree indicator for an electric valve driving device according to the first or second aspect, wherein when the plurality of multi-color indicators light up stepwise at an intermediate opening degree of the valve, the valve opening degree is small, it is characterized in that the adjacent multi-color display is avoided and selectively lit.

According to the present invention, valve opening degree information and warning information can be easily and reliably visually recognized even from a position about 10 m away from the installation location of the motor-operated valve drive device. In addition, there is an effect that the valve opening degree information of the motor-operated valve driving device installed in the dark place in the plant building and the valve opening degree information of the motor-operating valve drive device installed outdoors can be easily and reliably viewed even at night.

1 is a lighting/blinking pattern diagram of a multicolor display showing a first embodiment according to the present invention; FIG. FIG. 10 is a lighting/blinking pattern diagram of a multicolor display showing a second embodiment according to the present invention; FIG. 10 is a lighting/blinking pattern diagram of a multicolor display showing a third embodiment according to the present invention; FIG. 11 is a lighting/blinking pattern diagram of a multicolor display showing a fourth embodiment according to the present invention; and FIG. 11 is a block diagram showing a configuration of an opening degree display of a conventional electric valve drive device.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 5 is a general block diagram for detecting the valve opening degree of the motor-operated valve driving device and displaying it on the opening degree indicator. This block diagram applies not only to the prior art, but also to the present invention. The motor-operated valve drive device 1 has a structure in which rotation of a motor 2 is reduced by a reduction gear train 3 such as a worm gear and transmitted to a drive sleeve 4 to rotate a stem nut fitted in the drive sleeve 4. . In the case of a gate valve, the valve is opened and closed by reciprocating a stem shaft that is screwed with a stem nut.

The opening degree information of the valve is detected by the opening degree detector 5 after further decelerating the rotation extracted from the reduction gear train 3 . A potentiometer can be used for the opening detector 5 to extract an analog signal, or an absolute type rotary encoder can be used to extract a digital signal. The electrical signal detected by the opening detector 5 is processed by the signal processor 6 and the valve opening is displayed on the opening indicator 7 .

In an electronically controlled motor-operated valve driving device, the valve opening is often displayed as a numerical value from 0% to 100% on a liquid crystal display. However, even in that case, it is difficult to accurately view the liquid crystal display from an oblique direction, and it is often difficult to check the valve opening unless the operator approaches the machine side of the motor-operated valve driving device. Under these circumstances, three lamps or LEDs are used to indicate whether the valve is fully open, fully closed, or intermediate opening, in addition to the liquid crystal display. are often displayed as For example, a red lamp is lit in the fully open state, a green lamp is lit in the fully closed state, and an orange lamp is lit in the intermediate opening. Further, when an excessive load is applied to the motor-operated valve driving device and an alarm is generated by the torque detector, another lamp is flashed to indicate this. As a result, even if there is a distance of several meters from the machine side and the valve opening degree displayed on the liquid crystal display cannot be directly viewed, the valve is in any state of fully open, fully closed, or intermediate opening. You can check whether

However, there are cases where it is not sufficient to visually recognize whether the valve is fully open, fully closed, or intermediately opened. In the case of an intermediate degree of opening, there is no need for information on the degree of opening in increments of 1%, but there is a demand to know an approximate degree of opening, for example, whether the degree of opening is 20% or 60%. The present invention has been made to meet such demands.

(First embodiment)
FIG. 1 is a drawing showing lighting/blinking patterns of a multicolor display according to a first embodiment of the present invention. As the multicolor display, a total of five commercially available multicolor LEDs capable of emitting three colors of red, green, and orange are arranged in a straight line. The valve opening is indicated by the number of lighting of 5 multicolor LEDs, and when the valve is opened or closed, the 5 multicolor LEDs blink according to the valve opening. The multi-color LED, which lights or flashes according to the valve opening at the time of occurrence, flashes in a color different from the color during the opening and closing operation.

Here, lighting/blinking patterns of the multicolor LEDs of the electric valve drive device of the present invention shown in FIGS. 1 to 4 will be described. In the pattern at the time of stop, the multi-color LEDs with diagonal lines in a circle with diagonal lines slanting to the right indicate lighting in green, and the multi-color LEDs with diagonal lines in a circle with diagonal lines slanting to the left lighting up in orange. , and the multicolor LED marked with a black circle indicates that it is lit in red. Also, in the pattern during operation, the multicolor LEDs marked with double circles indicate blinking. Although not distinguished by the same double circle in the figure, they are made to flash in different colors when the valve is opened and closed. Specifically, it blinks in red during the opening operation, and blinks in green during the closing operation. Furthermore, in the pattern at the time of alarm, the multicolor LED with a cross inside the circle indicates that it blinks in orange. These lighting/blinking colors are common to other embodiments shown in FIGS. Note that the blank column of the lighting/blinking pattern indicates that the light is turned off.

First, the display pattern of the valve opening when the motor-operated valve driving device is stopped will be described. The valve opening from 0% to 100% is divided into 5 stages, and the number of lit multicolor LEDs increases by one each time the valve opening increases by one stage. That is, only one multi-color LED lights up when the valve opening is more than 0% and less than 20% and is stopped. Two multicolor LEDs light up when the valve opening is over 20% to less than 40%, and three multicolor LEDs are lit when the valve opening is over 40% to less than 60%. When the color LED lights up and the valve opening is over 60% to less than 80% and stops, 4 multi-color LEDs light up and the valve opening is over 80% to less than 100% and stops. In the state, 5 multicolor LEDs are lit. When the valve is stopped at 0%, 5 multi-color LEDs light up in green, and when the valve is stopped at 100%, 5 multi-color LEDs light up in red. indicates that Therefore, it is possible to visually recognize the valve opening in 20% increments by the number of lighting of the multicolor LEDs.

Next, the operation display pattern when the valve is opened and closed by the motor-operated valve driving device will be described. It is the same as the opening degree display pattern in that the valve opening degree is divided into five stages, and the number of blinking of the multicolor LED is increased by one each time the valve opening degree increases by one stage. Although not distinguished by the same double circle mark in FIG. 1, it blinks in red during the opening operation and blinks in green during the closing operation. Therefore, it is possible to determine whether the valve is opening or closing, and to visually recognize which of the five stages the valve is open.

Further, in the opening degree indicator of the present invention, an alarm is displayed when an excessive load acts on the electric valve driving device and a torque value or the like exceeds an alarm level. Therefore, the alarm display pattern will be explained. The alarm display pattern is also the same as the operation display pattern in that the valve opening is divided into 5 stages, and the number of blinking of the multicolor LED increases by 1 each time the valve opening increases by 1 stage. . However, it flashes in orange, which is different from the color during open/close operation. When the alarm is generated while the valve is stopped at 0%, one multi-color LED flashes in orange, and the alarm is generated when the valve is stopped at 100%. When it does, five multicolor LEDs blink in orange. Therefore, it is possible to easily know in what state the valve opening is causing the alarm.

(Second embodiment)
FIG. 2 is a drawing showing lighting/blinking patterns of a multi-color display according to a second embodiment of the present invention. In FIG. 1 showing the first embodiment, a total of five multicolor LEDs are used to display the valve opening in five stages, whereas in FIG. 2 showing the second embodiment, all The difference is that 7 multicolor LEDs are used to display the valve opening in 7 stages. However, the linear arrangement of the multi-color LEDs, the lighting pattern of the multi-color LEDs when stopped, the blinking pattern of the multi-color LEDs when opening and closing, and the blinking pattern of the multi-color LEDs when an alarm is generated are largely unacceptable. There is no difference.

First, the display pattern of the valve opening when the motor-operated valve driving device is stopped will be described. The valve opening from 0% to 100% is divided into 7 stages, and the number of lit multicolor LEDs increases by one each time the valve opening increases by one stage. That is, only one multi-color LED lights up when the valve opening is more than 0% and less than 14.3% and is stopped. Each time the valve opening increases by one step, the number of multicolor LEDs lit increases by one. 7 multicolor LEDs light up. When the valve is stopped at 0%, 7 multi-color LEDs light up in green, and when the valve is stopped at 100%, 7 multi-color LEDs light up in red. indicates that Therefore, compared to the first embodiment in which five multicolor LEDs are used to display the valve opening in stages, this embodiment can display a more detailed valve opening.

A characteristic point of the lighting/blinking pattern of the multicolor LEDs in this embodiment is that when the multicolor LEDs are lit/blinking according to the valve opening, avoid adjacent multicolor LEDs when the valve opening is small. The choice is to light up. With this lighting/flashing pattern, the number of multicolor LEDs that are lighting/flashing can be reliably recognized even from a distance or at night.

Specifically, when checking with an actual machine, 7 multicolor LEDs with a diameter of 3 mm are arranged in a straight line at intervals of 10 mm. Although it was not possible to distinguish between them, when one was skipped and two were lit at intervals of 20 mm, it was confirmed that two were clearly lit. Of course, it is affected by the visual acuity of the observer, but the above confirmation result is the result of confirmation by the same person. In addition, when seven multicolor LEDs with a diameter of 5 mm were arranged in a straight line with an interval of 10 mm and two adjacent LEDs were lit, it was not possible to clearly distinguish whether the number of lit LEDs was one or two at a distance of 10 m. However, when one LED was skipped and two LEDs were lit at an interval of 20 mm, it was clearly confirmed that the two LEDs were lit even from a position 10 m away.

Regarding the operation display pattern when the valve is opened and closed by the motor-operated valve driving device, the number of multicolor LEDs blinking during the opening and closing operation is also displayed in seven stages according to the valve opening degree being displayed in seven stages. be done. It is the same as the first embodiment in that it blinks in red during the opening operation and blinks in green during the closing operation.

The alarm display pattern is also the same as in the first embodiment, except that the valve opening is divided into seven stages. That is, the alarm display pattern divides the valve opening into seven stages, and each time the valve opening increases by one stage, the number of blinking of the multicolor LED increases by one. Flashes orange. When the alarm is generated while the valve is stopped at 0%, one multi-color LED flashes in orange, and the alarm is generated when the valve is stopped at 100%. When it does, five multicolor LEDs blink in orange.

(Third Embodiment)
FIG. 3 is a drawing showing lighting/blinking patterns of a multi-color display according to a third embodiment of the present invention. The third embodiment is significantly different from the first and second embodiments in that five multicolor LEDs are arranged in a ring. The number and colors of the multicolor LEDs that light up when the motor-operated valve drive device is stopped are the same as in the first embodiment. However, when the valve opening is small, the adjacent multicolor LEDs are selectively turned on while avoiding them.

The operation display pattern and the alarm display pattern during the opening and closing operation of the motor-operated valve drive device are the same as in the first embodiment in terms of the number of flashes and flashing colors, except for the arrangement of the multicolor LEDs. That is, the valve opening degree is divided into five stages, and the number of flashes of the multicolor LED is increased by one each time the valve opening degree increases by one stage. And while it blinks in red during the opening operation, it blinks in green during the closing operation. In addition, when an alarm is generated when the valve is stopped at 0% opening, one multicolor LED flashes in orange, and the alarm is generated when the valve is stopped at 100% opening. When it does, five multicolor LEDs blink in orange.

According to this embodiment, even if the number of multicolor LEDs to be arranged is increased, compared to the case of arranging them in a straight line as in the first embodiment, there is a feature that the occupied space can be reduced. Conversely, when they are arranged in the same exclusive space, the distance between adjacent multicolor LEDs can be increased, and visibility can be improved.

(Fourth embodiment)
FIG. 4 is a drawing showing lighting/blinking patterns of a multicolor display according to a fourth embodiment of the present invention. In this fourth embodiment, 6 multicolor LEDs are arranged in a ring, and 1 multicolor LED is added at the center, for a total of 7 multicolor LEDs. is significantly different from the third embodiment. That is, it can be said that the arrangement of the multicolor LEDs is a combination of the linear arrangement and the annular arrangement.

The operation display pattern and alarm display pattern during the opening/closing operation of the motor-operated valve drive device are substantially the same as in the third embodiment, except that the arrangement and number of multicolor LEDs are different. That is, the valve opening degree is divided into seven stages, and the number of flashes of the multicolor LED is increased by one each time the valve opening degree increases by one stage. It blinks in red during the opening operation, and blinks in green during the closing operation. In addition, when an alarm is generated when the valve is stopped at 0% opening, one multicolor LED flashes in orange, and the alarm is generated when the valve is stopped at 100% opening. When it does, 7 multicolor LEDs blink in orange.

According to this embodiment, the valve opening can be displayed in more detail than in the third embodiment.

Although the present invention has been described above based on the examples, the present invention is not limited to the above-described embodiments, and various modifications can be made. For example, in the above-described embodiments, multicolor LEDs capable of emitting light in three colors of red, green, and orange were used, but other colors are also applicable, and are not limited to the above three colors. . In addition, for example, if five or more colors are emitted by a multicolor LED, it is possible to display by lighting instead of blinking at the time of operation or at the time of alarm. can do. In short, it suffices if each pattern at the time of stop, operation, and alarm can be identified, and is not limited to the lighting/blinking patterns shown in the above-described embodiments.

Moreover, although the example in which the number of multicolor LEDs lit increases as the valve opening increases, conversely, the number of multicolor LEDs lit may increase as the valve opening decreases. Furthermore, although the example using five multicolor LEDs and the example using seven multicolor LEDs have been described, any number of multicolor LEDs can be applied as long as the number is three or more.

INDUSTRIAL APPLICABILITY The opening degree indicator for a motor-operated valve drive device according to the present invention can be applied to a motor-operated valve drive device installed in piping or the like in various plants.

1 motor-operated valve driving device 7 opening indicator

Claims (3)

An opening degree indicator for a motor-operated valve drive device, wherein the intermediate opening degree of the valve is indicated step by step by the number of lighting of the plurality of multi-color indicators, and the plurality of multi-color indicators are displayed during the opening/closing operation of the valve. Different colors are flashed during the opening operation and the closing operation, and when an alarm of the motor-operated valve driving device is generated, the plurality of multi-color indicators are flashed in a color different from the color during the opening and closing operation to indicate the valve at the time of alarm generation. , wherein the plurality of multi-color indicators are arranged in a ring . When the valve is fully closed and an alarm is generated in the motor-operated valve driving device, only one of the plurality of multi-color indicators flashes, and when the valve is in a fully open state and the motor-operated valve driving device is alarmed. 2. An opening degree indicator for a motor-operated valve driving device according to claim 1, wherein all of said plurality of multicolor indicators blink. 2. When said plurality of multi-color indicators are illuminated step by step at an intermediate valve opening, when the valve opening is small, said multi-color indicators are selectively illuminated while avoiding adjacent multi - color indicators. An opening indicator for the motor-operated valve drive device according to 1.

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