KR100957952B1 - Valve actuator with self-diagnostic function and intelligent type valve actuator - Google Patents

Abstract

The valve actuator of the present invention controls the opening / closing state of the flow path by the valve based on the state data of various sensors, self-diagnoses the deterioration state of the device itself, and predicts the time or operation of replacement of parts such as female screws and seals. Self-diagnosis is performed in a type capable of performing self-maintenance maintenance, or self-controlling the opening / closing state of the flow path by a valve based on the state data from various sensors, and self-diagnosing the deterioration state of the device itself, It can be configured in an intelligent format that has the function of predicting the time of replacement or operation of parts, and performing operation operation and maintenance maintenance.

Description

VALVE ACTUATOR WITH SELF-DIAGNOSTIC FUNCTION AND INTELLIGENT TYPE VALVE ACTUATOR}

1 is a schematic block diagram showing a valve actuator having a self-diagnosis function which is an embodiment of a valve actuator according to the present invention;

FIG. 2 is a block diagram showing the main parts of a control circuit which is a drive system of the valve actuator of FIG.

FIG. 3 is a schematic diagram showing the appearance of the valve actuator of FIG. 1;

Figure 4 is a schematic diagram showing a valve actuator having a drive system of the horizontal manual handle according to the present invention,

Fig. 5 is a schematic view showing a valve actuator having a drive system for the vertical manual handle according to the present invention;

6 is a sectional view showing an example of a torque sensor provided in the valve actuator;

7 is a schematic block diagram showing an intelligent valve actuator that is another embodiment of a valve actuator according to the present invention;

FIG. 8 is a block diagram showing the main part of the control circuit of the drive system of the valve actuator shown in FIG.

Fig. 9 is a schematic diagram showing the valve actuator shown in Fig. 7.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve actuator for moving a valve of a water gate, a door, a gate, a valve body, and the like (generally called a valve) installed to open and close a flow path, for example. In particular, a valve actuator having a self-diagnosis function capable of monitoring a driving position such as valve position detection and torque detection, and a wear state of a female thread, and self-control in an appropriate state by driving means according to various detection information. It relates to an intelligent valve actuator.

Conventionally, valves such as gates, water gates, doors, valve bodies, etc. for controlling flow rates by opening and closing flow paths are installed in flow paths through which fluids such as waterways, water purification plants, power plants, and rivers flow. Valve actuators are being used to operate the system. It is known that a valve actuator for driving a valve is provided with a controller capable of controlling a part of the valve opening / closing while aiming at the central information system to be controlled using a controller (for example, in Japanese Patent Laid-Open Publication). See Publication 11-107254)

Conventionally, in a valve drive actuator device, a gap of a screw used by providing a reference screw as a screw wear amount detection device has been detected, thereby detecting the wear amount of the female screw. Alternatively, as a wear amount detecting device for a screw, a load torque curve of a screw has been detected and the wear amount of a female screw has been calculated from a torque change caused by an increase in the gap of the screw. The female thread wear detection device includes a sleeve rotatably attached to a housing, a female threaded member splined to the sleeve, a female threaded spindle engaged with the female threaded member and movable in an axial direction, and without being loaded with the spindle. A model female screw rotatably attached to the spindle and movable integrally with the female screw member and movable downward in an axial direction according to an axial movement corresponding to the wear amount of the female screw member, and a ring shape formed on an outer circumference of the model female screw A moving block attached to a groove inserted in the groove and guided by a guide pin fixed to the housing and movable only in an axial direction corresponding to the axial movement of the model female screw, and corresponding to the amount of wear of the female screw member Differential side detecting moving distance of moving block There is one comprised of the movement amount sensor which consists of an indenter (for example, refer Unexamined-Japanese-Patent No. 8-9603).

In addition, the abnormality diagnosis and deterioration prediction apparatus installed in the conventionally known valve apparatus performs the identification of abnormality signs and the specification of abnormal points during operation, specifying the repair site, limiting and abnormality of the inspection range of the electric valve. The indication is judged. The abnormal diagnosis and deterioration prediction apparatus connects a driving force sensor installed in a drive unit to the diagnosis device, and hypothesizes an energy sensor for detecting supply energy to the drive unit, and a vibration sensor for detecting vibration of the valve unit. The detection signal outputted from these sensors is converted into a predetermined signal by the data conversion unit, and the diagnosis is performed for each diagnosis item against the maintenance record including the allowable value and the diagnosis result for each diagnosis item. There are some cases in which analytical diagnostic processing of data information is performed to determine normal or abnormality and further predict degradation (for example, see Japanese Patent Laid-Open No. 2002-130531).

 However, in an abnormal diagnosis and deterioration prediction device such as a conventional thread wear detection device, a type of detecting a gap using a reference screw, for example, must be manufactured with a high precision, and the reference screw must be assembled. There is a problem in that a complicated structure is required, and the manufacturing cost is high. In addition, the thread wear detection device that detects the load torque curve of the screw and calculates the amount of wear of the female thread from the torque change caused by the increase in the gap of the screw, when analyzing the wear of the female thread by the torque waveform, It was difficult to know the difference from the torque waveform, and there was a problem that the wear of the internal thread could not be detected with high precision.

In addition, the conventional screw wear detection device is provided with a sub-tension with a spring applied in addition to the main drive screw, and detects a wear amount of the screw by detecting a distance from the main drive screw. Not only is it difficult to measure the distance between the screw and the sub-screw, but also the structure is complicated mechanically, high machining precision is required for each member, and the wear detection of the screw is performed by detecting the wear of the screw by distance detection. There is a problem in that it is easy to be inherited by the members and is adversely affected, and that the accuracy to be detected cannot be reliable.

In the conventional valve device, the device for detecting the clearance amount due to the wear amount of the female thread of the stem bush is calculated by estimating the idle amount of the gap from the torque curve, and the output speed is an estimated value. It is not detectable and the torque sensor (distance sensor, strain gauge) is a structure which is assembled inside a gear case, and cannot be easily assembled, and it is difficult to remodel on site.

In addition, the conventional electric valve actuator has achieved limit detection such as position limit and torque limit using mechanical transmission means in which gears, cams, and the like are assembled. The current situation is that the gear transmission mechanism is also used. Therefore, in the conventional electric valve actuator, in order to employ a switch unit such as a limit switch or a torque switch, there are many parts for constituting the transfer unit of the switch unit, the transfer unit of the valve opening degree, and the like. There is a problem that the failure rate is increased by increasing the number of parts.

In addition, special techniques are required for the adjustment of these switch units, and since the case is opened for the adjustment of the parts, related accidents and failures occur. In addition, since the open gauge of the valve converts the total rotational speed (360 ° × n rotation) of the sleeve shaft into a motion of, for example, 0 ° to 270 °, there are various combinations of reduction gears, so that the valve actuator is delivered. ), The change was difficult.

In addition, in an abnormal diagnosis and deterioration prediction device such as a conventional thread wear detection device, a type of detecting a gap by using a reference screw, for example, has to be manufactured with a high precision, and the reference screw is assembled. There is a problem in that a complicated structure is required to make the manufacturing cost high. Alternatively, the thread wear detection device that detects the load torque curve of the screw and calculates the amount of wear of the female thread from the change in torque caused by the increase in the gap of the screw is normal when the wear of the female thread is analyzed by the torque waveform. It was difficult to know the difference between the torque waveform and there was a problem that the wear of the internal thread could not be detected with high accuracy.

SUMMARY OF THE INVENTION An object of the present invention is to provide a valve actuator that drives a spindle for operating a valve such as a water gate, a door, a valve body, and a gate so as to be movable up and down by a stem bush. Self-diagnosis by detecting and monitoring the temperature and humidity inside the housing, detecting the amount of wear on the female thread of the stem bush, predicting the deterioration by the state data of the motor or electronic parts, deterioration of the wear of the drive system parts, and the state data of the driving current of the motor. In addition, the present invention provides a valve actuator having a self-diagnosis function capable of normalizing a device itself by a controller in response to such information, or facilitating parts replacement processing or the like in response to the information.

Another object of the present invention is to electrically detect and monitor status data and perform self-diagnosis, and to normalize the device itself by means of a built-in control circuit in response to such information, or to replace or alert parts in response to the information. The present invention provides an intelligent valve actuator capable of displaying (iii).

The present invention includes a spindle attached to a valve for opening and closing a flow path and having a spindle supported to be movable up and down in the housing for opening and closing the flow path by the valve, and a female screw threaded to a male screw installed on the spindle. A transmission device having a stem bush rotatably supported on the stem bush and a worm wheel fixed to the stem bush and a worm which is engaged with the worm wheel to rotate the stem bush to move the spindle up and down to transmit rotation from a driving means. In the valve actuator provided with,

A setter for setting a predetermined predetermined set value of state data; Various sensors each detecting a measurement of the state data; A first control circuit which compares and judges the measured value and the set value and starts processing such as parts replacement repair, alarm, etc. in response to the information from which the measured value deviates from the set value; A first display device for displaying the measurement value by the sensor and simultaneously displaying the processing started from the first control circuit; A first control board having a communication unit connected to said setter, a first control circuit, a first display device and a first control circuit; And a first controller for displaying the measured value through the communication unit and operating the driving means through the first control circuit in response to the information. It is about.

The various sensors for detecting the state data include a first encoder having an encoder for detecting the rotational speed of the spindle and integrating the rotational speed in order to detect the valve position and detect the opening degree of the valve flow path. A rotation speed sensor, a torque sensor for detecting torque loaded on the spindle, a temperature sensor for detecting a temperature of the motor as the driving means and the first control substrate region, a humidity sensor for detecting an internal humidity of the valve actuator, and A vibration sensor for detecting vibration of the valve actuator, a female thread wear sensor for detecting wear of the female screw of the stem bush using the first rotation speed sensor and a torque sensor, and a starting current for driving the motor And a current sensor for detecting the number of times of operation.

The first control circuit outputs an abnormal signal to an abnormal measurement value in response to the respective measurement values of the first rotation speed sensor, the torque sensor, the temperature sensor, the humidity sensor, the vibration sensor, the female thread wear sensor, and the measurement value of the current sensor. At the same time, information is exchanged with the first controller via the communication unit to operate the driving means through the first control circuit in accordance with a command from the first controller.

The female thread wear sensor determines the gap amount between the male screw and the female thread based on the torque curve obtained according to the amount of movement of the worm in the axial direction, and at the same time, the rotation speed of the stem bush corresponding to the determined gap amount. Is detected, and the amount of rotation of the stem bush is multiplied by the pitch of the female screw to detect the wear amount of the female screw.

The first display device is an LCD (LCD) which displays a measurement value of measuring the state data, a predetermined set value of the state data, and various kinds of information on the failure data or abnormality of the part.

The first controller is a ship control device, a personal computer, and a wireless remote controller. Further, the first controller predictively controls deterioration of the motor and the electrical component as the driving means based on predetermined data according to the measured value by the temperature sensor.

In addition, the controller can predictively control the wiring failure, the cover failure, and the immersion state of the heater provided in the valve actuator based on the predetermined data according to the measured value by the humidity sensor.

Since the valve actuator is configured as described above, the data can be monitored by the data received by various sensors, and the lifespan of the slide parts and the seals provided in the respective parts can be improved by, for example, detecting the starting number. It is possible to predict and monitor the state of valves and actuators by torque detection, and to prevent deterioration of motors and electrical components caused by temperature conditions due to temperature detection, and to prevent wiring defects due to humidity detection. Cover torque failure and submersion detection can be predicted, and wear of the internal thread of the stem bush can be detected by the combination of the encoder and the torque sensor. On the basis of the data monitored and monitored as a self-diagnosis function, the controller of the ship can facilitate status monitoring maintenance, that is, drive control for countermeasures, parts replacement, and the like. Moreover, this valve actuator is equipped with a 1st control board | substrate, and communication with the outside is attained, and operation control and state monitoring can control a some valve actuator with one 1st controller. The valve actuator can easily monitor the valve operation state, setting state, fault indication, and the like by the first display device.

Since the valve actuator having the self-diagnosis function is configured as described above, it is possible to detect and display abnormality or lifespan in advance, prevent the failure of the actuator, and prevent the occurrence of an accident due to the failure. When replacing worn parts, it is sufficient to replace only the defective parts, which can reduce the number of regular inspections, reduce operating costs, and check the maintenance maintenance time by the self-diagnosis function. It is possible to easily set various kinds of parameters, and to reliably set various state data, and to drive-control the valve state by the objective controller, contributing to the reduction of management cost.

In addition, the present invention is a stem bushing rotatably supported on the housing having a spindle attached to a valve for opening and closing the flow path and supported to be movable up and down in the housing, a female screw threaded to the male screw installed on the spindle, A valve actuator having a worm wheel fixed to the stem bush and a transmission device having a worm in which rotation from a driving means is transmitted to rotate the stem bush so as to move the spindle up and down; A reversible unit installed in a motor constituting the drive means; A setter for presetting an appropriate setpoint of the state data; Various sensors each detecting a measurement of the state data; Comparing the measured value with the set value in response to the measured value by the sensor and operating the drive means and performing a program operation in response to the information in which the measured value deviates from the set value, thereby appropriately controlling the opening and closing state of the flow path by the valve. A second control circuit; A display device which displays the measured values and displays processes such as parts replacement repair and alarm in response to the information generated from the second control circuit; A second control board having a communication unit connected to said setter, said control circuit, said display device and said second control circuit; And a second controller configured to appropriately control the opening / closing state of the flow path by the valve by operating the drive means while changing the input of the measured value, the information display, and the set value through the communication unit. It relates to an intelligent valve actuator.

The various sensors for detecting the state data have a rotational speed sensor provided with an absolute encoder which detects the rotational speed of the spindle and accumulates the rotational speed in order to detect the valve position and detect the opening degree of the valve flow path. A torque sensor detecting a torque loaded on the spindle, a temperature sensor detecting a temperature of the motor as the driving means and the second control substrate region, a humidity sensor detecting an internal humidity of the valve actuator, and a vibration of the valve actuator A vibration sensor that detects the pressure, a female thread wear sensor that detects the wear amount of the internal thread of the stem bush using the second rotation speed sensor, and the torque sensor, and a current that detects the number of operation by detecting the starting current for driving the motor. It includes a sensor.

The female thread wear sensor determines the gap amount between the male thread and the female thread based on a torque curve obtained along the axial movement amount of the worm measured by the torque sensor in the second control circuit, and the rotational speed sensor determines the gap amount. The rotation speed of the said stem bush is detected, the calculation of the rotation speed of the stem bush multiplied by the pitch of the female screw is performed, and the wear amount of the female screw is detected.

The second controller controls the control circuits of the second control substrates respectively provided in the plurality of valve actuators. The second controller is a personal computer and a wireless remote controller. The second display device is an LCD (LCD) which displays the state data, the set state of various kinds of the set values, and various kinds of information on fault data and abnormality of parts.

Moreover, the said 2nd controller predictively controls the slide part of components, and the various information of each seal life based on the predetermined state data according to the measured value by the said 2nd rotation speed sensor. The second controller predictively controls various types of information of component deterioration such as a motor, an electronic element, etc., which are the driving means, based on the predetermined state data in accordance with the measured value by the temperature sensor. In addition, the second controller predictively controls various types of information on the wiring failure of the heater, the cover attachment failure, and the immersion situation into the cover based on the predetermined state data according to the measured value by the humidity sensor.

As described above, the intelligent valve actuator is equipped with an absolute encoder so that the valve position is detected regardless of the presence or absence of a control power supply, and thus the number of parts is reduced. It is possible to reduce the manufacturing cost and failure rate, and to detect the valve position, the current, torque, temperature, humidity, vibration, etc. of the motor provided with the reversible by various sensors, According to the information of the measured value, the driving means can be driven according to a predetermined program operation to self-control to an appropriate state, and the predetermined set values of various state data can be set safely, easily and reliably, and the state monitoring by the self-diagnosis function It is possible to protect the device itself.

In addition, since the intelligent valve actuator is configured as described above, a program operation is performed by a second control circuit built in the second control board, and the state monitoring maintenance by the self-diagnosis function, that is, maintenance maintenance time, etc. is confirmed. It is possible to easily and reliably set various settings for devices such as sensors.

In addition, the valve actuator can be installed by using an absolute encoder or reversible to reduce the number of parts, to reduce the manufacturing cost and to reduce the failure rate, and furthermore, to adjust the position limit and the torque limit from the outside without opening the case. It is possible to easily perform the case, the case can be configured in a non-penetrating structure, it is possible to prevent the intrusion of water into the switch portion, it is possible to reduce the failure rate.

In the valve actuator, a conventional valve actuator includes a limit switch transmission section and a transmission section to an opening system based on a guideline by mechanical gear transmission. Special technology is required, and regular inspections have to be made to check for any abnormality. However, the parts and work as described above are unnecessary. For this reason, although the combination of the reduction gear is complicated, since the present invention is a digital liquid crystal display, a conventional gear device can be eliminated.

Example

EMBODIMENT OF THE INVENTION Hereinafter, the valve actuator by this invention is demonstrated with reference to drawings.                     

First, with reference to Figs. 1 to 6, a valve actuator having a self-diagnosis function as a first embodiment of the valve actuator according to the present invention will be described.

As shown in Figs. 1 and 3, the valve actuator is, for example, a flow path tube 16 fixed to a housing 3 connected to a flow path such as a water channel and a water purification plant, and a flow path of the flow path tube 16 4) Spindle 1, which is attached to a load chain valve 5 such as a gate, a water gate, a door body, a valve body, etc., which are arranged to open and close, and is supported on the housing 3 so as to be movable up and down, and a male screw installed on the spindle 1; Stem bush (2) having a female screw (11) screwed to the (10) and rotatably supported by the housing (3), and a stem bush to rotate the female screw (11) to move the spindle (1) up and down (2) has a transmission device 24 which consists of gears 24A and 24B which transmit rotation from the motor 12 as a drive device to the spindle 1, a worm gear, a reducer, a clutch 27, and the like. The worm gear in the transmission device 24 includes a worm wheel 8 fixed to the stem bush 2 and a worm wheel 8 to rotate the female screw 11 to move the spindle 1 up and down. It has a worm 9 which is engaged with and transmits rotation from the drive means.

The housing 3 is composed of a plurality of housing members, and for receiving the drive system of the valve 5, for example, a flange 25 or a support end for rotatably supporting the stem bush 2. (26) is provided. In the flange portion 25 and the support end 26 of the housing 3, bearings 21 such as a thrust bearing are interposed, and the sleeve 20 rotates through the bearing 21 in the housing 3. It is possibly installed. The stem bush 2 provided with the female screw 11 is fixed to the fitting portion 19 of the sleeve 20 by a spline or a key. Moreover, the worm wheel 10 which comprises a worm gear is being fixed to the outer peripheral part of the sleeve 20 by spline, a key, press fitting, etc. Accordingly, the valve actuator has a structure in which the worm wheel 10, the sleeve 20, and the stem bush 2 are integrally rotated by the worm 9, which is rotated from the driving device through the delivery device 24. It is. A ring-shaped gland packing 15 into which the spindle 1 is inserted is sealed in the housing 3 so that fluid such as water in the flow path 4 does not enter the power transmission device 24 or the female screw 11. It is arrange | positioned at the support end 23 of this housing 3, and the gland packing 15 is fixed to the housing 3 with the pressing member 22. As shown in FIG. In this valve actuator, the female screw 11 rotates as the stem bush 2 rotates according to the above configuration, and the male screw 10 moves up and down along the female screw 11 by the rotation of the female screw 11. As a result, the spindle 1 moves up and down. In the flow path tube 16, a valve fitting portion 18 into which the valve 5 is fitted is formed, and the valve 5 is fitted into the valve fitting portion 18 to close the flow passage 4, and further, FIG. 3. As described above, the flow path 4 is in the open state at the position where the valve 5 is raised.

As shown in Figs. 1 to 3, the valve actuator detects the rotational speed of the spindle 1 in order to detect the state data, that is, the valve position, and integrates the rotational speed. A rotation speed sensor 7 having an encoder, a torque sensor 28 for detecting torque loaded on the spindle 1, a motor 12 as a driving means, and a thermistor for detecting a temperature in the control board 30 region. Consisting of temperature sensors 33 and 34, humidity sensor 36 for detecting the internal humidity of the valve actuator, valve opening sensor for detecting the opening degree of the flow path 4 of the valve 5, vibration for detecting the vibration of the valve actuator A sensor 37, a female thread wear sensor that detects wear of the female screw 11 of the stem bush 2, and a current sensor 32 that detects the starting current for driving the motor 12 and detects the number of operations; have.

The valve actuator has a self-diagnosis function, and as shown in FIG. 1, the control circuit 30 includes a control circuit 6 and a display device 17. Here, the self-diagnosis function does not have a function of operating the actuator by itself, but according to the information obtained by the self-diagnosis function, the actuator is operated according to the operator's instruction by a transformer, a reversible device, or the like installed in the cruise control unit 40C. To control the operation.

In this valve actuator, the respective detected values detected by the various sensors described above, that is, the measured values, are inputted to the control circuit 6, processed by the control circuit 6, and displayed on the display device 17. The control circuit 6 compares each of the measured values of the state data with a threshold at each preset value 61 preset in the comparator 60 so as to respond to information in which the measured values deviate from the set value 61. Issue processing instructions such as exchange repair and alarm. As shown in Fig. 1, the controller 40C serving as the objective control device drives the motor 12, which is the driving means, in response to the measured values of the various sensors to open and close the flow path 4 by the valve 5. Change Moreover, in the said valve actuator, the motor 12 which is a drive means is driven in response to the measurement value of the said various sensors, and the opening / closing state of the flow path 4 by the valve 5 is changed. . The control circuit 6 compares each measurement value of the state data with the limit value in each preset value 61 preset in the comparator 60, and remains in response to the information in which the measured value is within the range of the set value 61. Displays the operation maintenance processing in the operating state of.                     

The controller 40C serving as the objective ship control device proceeds to the next operation of changing the opening / closing state of the flow path 4 by the valve 5 by driving the motor 12 as a driving means in response to the measured values of various sensors. Control can be executed by issuing a maintenance processing command. The controller 40 includes, in addition to the objective line control device 40C, a personal computer monitor 65 and / or a radio wireless remote control (remote control, wireless monitor) 64. In other words, the valve actuator can set or adjust various state data or operate the driving means by the controller 40 or the objective line control device 40C. The controller 40 is connected to the control board | substrate 30 provided in each of several valve actuator, and can monitor or set control the operation state of each valve actuator, respectively. That is, one controller 40 can control a plurality of valve actuators. In addition, the display device 17 can display the state data of the valve actuator, the setting state of various set values, and component failure data of the valve actuator. In addition, the controller 40 can monitor and adjust the set value 61 in response to the measured value through the communication unit 38 connected to the control circuit 6. The motor 12, each sensor and the control circuit 6 are configured to be driven and powered from the power supply via the terminal unit 45 (FIGS. 4 and 5) by the objective controller 40C or a switch installed in the field. It is.

In the valve actuator, for example, the control circuit 6 includes a temperature sensor 33 and a control board 30 for detecting the temperature of the rotation speed sensor 7, the torque sensor 28, and the motor 12 each including an encoder. Temperature sensor 34 for detecting a temperature, humidity sensor 36 for detecting humidity in an electrical component region of the control board 30 that is inside the housing 3 constituting the valve actuator, and flow path 4 of the valve 5 Of the valve opening sensor for detecting the opening degree of the valve, the vibration sensor 37 for detecting the vibration of the drive system of the valve actuator, and the female screw 11 of the stem bush 2 engaged with the male screw 10 of the spindle 1. In response to the respective measured values inputted from the female thread wear sensor for detecting wear and the current sensor 32 for driving the motor 12 for every predetermined period, the measured values are converted into the display conversion means 62. Display on LCD (17) through and connected to control circuit (6) And the information exchange with the controller 40 through the communication unit 38. Accordingly, the controller 40 can confirm the diagnosis contents of the valve actuator through the communication unit 38, and can be appropriately set, adjusted, or further controlled by the remote control 64, the personal computer 65, or the like. The controller 40C can confirm the diagnosis and drive the motor 12 to control the opening and closing of the valve 5.

Position setting of the valve 5 detects the rotation speed of the spindle 1 by the encoder which comprises the rotation speed sensor 7 via the screw gear 68 provided in the worm shaft 29, and the valve 5 Can be detected and set accurately and easily by the valve 5 of the flow path 4. The encoder uses an incremental encoder and detects the rotation of the sleeve shaft, i.e., the worm shaft 29, so that the position of the valve 5 can be arbitrarily designated 41 by the state output 35. You can output it, i.e. display it.

The current sensor 32 can detect the motor current and measure the number of startings. The current sensor 32 arbitrarily sets a trigger value to set the starting current, counts the starting current generated when starting the motor, and counts the starting value. Is the number of starts. At this time, the starting current is higher than the normal current. The life prediction outputs an alarm to the status output 35 when the preset number of starts is exceeded. Normally, current values are stored and managed as data, and if they fall outside of those data ranges, they are set to, for example, 1 A, and the current value increases due to secular variation, for example, increases to 1.7 A. Normally, the current value exceeds a predetermined range determined in advance, and it is judged as the life of the seal, and the output indicated by reference numeral 41 in the control circuit 6 (CPU) is configured to appear as an alarm output.

The torque detection can be detected and set accurately and easily by the torque sensor 28 assembled through the torque spring 67 on the worm shaft 29. As shown in Fig. 6, the torque sensor 28 converts the amount of movement of the worm 9 into an electrical signal and detects it, and linearly detects the torque applied to the valve 5, that is, the spindle 1. have. That is, torque detection detects the movement amount of the worm 9 with a linear (or rotational) potentiometer, and converts it to the torque value. When the measured value of the torque loaded in the opening / closing direction of the valve 5 exceeds the preset torque value, an alarm of the state output 35 is output. The torque data is stored and managed (loaded), and when the torque is out of these data ranges, the torque is increased due to secular variation, which is determined as the life of the seal, and the alarm output of the status output 35 is configured. .

Further, the temperature sensor 33 of the motor 12 constantly detects the motor coil temperature, detects motor abnormalities, and prevents burnout. The temperature sensor 33 measures the motor coil temperature with a thermistor attached to the motor coil. When the measurement by the temperature sensor 33 becomes more than the predetermined motor coil temperature set in advance, it is comprised so that it may determine that it is torque / motor abnormality and will output the alarm of the status output 35. FIG.

In addition, the controller 40 is based on the data determined by the humidity sensor 36 based on the predetermined data for the wiring of the heater installed in the valve actuator, the failure of the cover attached to the housing 3, and the inundation state into the cover. Predictive control. Humidity detection attaches the humidity sensor 36 to the housing 3, ie, the actuator machine, to detect the humidity in the machine. When the predetermined humidity, for example, 70% or more is set in advance, it is determined that the water is flooded in the machine or the packing is defective, so that the alarm output of the status output 35 is performed.

In addition, the display device 17 is configured with an LCD, that is, a liquid crystal display, which is a digital display, and can display various set values and operating states relating to the valve actuator. The valve actuator is provided with an open gauge 52 for indicating the opening degree of the valve 5 via the switch unit 66 including the torque switch 50 and the limit switch 51 (Fig. 5). In the display device 17, the number of times of operation of the valve 5, the opening and closing torque for opening and closing the flow path 4 of the valve 5, the temperature and humidity of the electric component region provided in the motor 12 or the control board 30. While the wear state of the female screw 11 is displayed, the set value 61 of these upper and lower limits can be displayed. In addition, the display device 17 samples the data 31 of the measured values from the current sensor 32, the temperature sensor 33, the rotational speed sensor 7, and the torque sensor 28. Data 31 is displayed on the LCD via the display conversion means 62. The measured value of the rotation speed sensor 7 is sampled by the data 31 via the pulse 63 / V converter 63.

In addition, the female thread wear sensor determines the gap amount between the male thread 10 and the female thread 11 based on a torque curve obtained along the axial movement amount of the worm 9, for example, as described later. At the same time, the rotation speed of the stem bush 2 corresponding to the determined gap amount is detected, and the calculation of the rotation speed of the stem bush 2 is multiplied by the pitch of the female screw 11 to detect the wear amount of the female screw 11. have. That is, when the female screw 11 is operated in the valve opening direction from the valve closing side, the torque value changes in the order of the hammer blow, the idle portion of the female screw 11, and then the actual load. The amount of wear of the internal thread 11 can be detected by detecting the time to which it becomes. At this time, by obtaining the encoder count value, a more accurate operating point can be detected and the measurement accuracy can be improved. The female screw 11 of the stem bush 2 outputs an alarm of the status output 35 when the wear of the predetermined portion or more occurs, and prompts the replacement of the female screw 11. This is because the abnormal wear of the female screw 11 causes the valve body, i.e., the spindle 1, to fall, resulting in a dangerous state of closing the flow passage 4.

In addition, the controller 40 can predictively control the slide part of the components of the valve actuator and the lifespan of each seal according to the measured value by the rotation speed sensor 7 based on predetermined data. In addition, the controller 40 can predictively control the deterioration of the motor 12 and the electric component, which are the driving means, based on the predetermined data in accordance with the measured values by the temperature sensors 33 and 34 made of thermistors and the like. In the valve actuator having the self-diagnosis function, the set value of the current by the current sensor 32, the set value of the torque by the torque sensor 28, the set value of the wear amount of the female screw 11 by the female thread wear sensor, and the temperature sensor 33 , The set value of the temperature by 34 and the set value of the humidity by the humidity sensor 36 can be set by the setter 39 at the command of the controller 40. The status display and stored data (loading data) are also output to the controller 40 via the communication unit 38.

As a specific embodiment of the valve actuator, a valve actuator of the horizontal handle shown in Fig. 4 or the vertical handle shown in Figs. 5 and 6 will be described. The valve actuator of the horizontal or vertical handle can move the spindle 1 up and down by the manual handle 44. The valve actuator having the self-diagnosis function is specifically, by changing the limit switch 51 into a rotation speed sensor 7 made of an encoder which is an electrical component, and by changing the torque switch 50 into a torque sensor 28. Can be configured. Moreover, the transmission apparatus 24 in the valve actuator which has the vertical handwheel 44 contains a reducer, a worm gear, etc. which transmit rotation from the drive means of the motor 12 or the handwheel 44. Moreover, as shown in FIG. The rotation of the female screw 11 of the stem bush 2 is carried out via the transmission device 24, and the spindle 1 provided with the male screw 10 screwed to the female screw 11 is moved up and down.

In the case of the horizontal manual handle 44 of FIG. 4, when the manual handle 44 is manually rotated, the handle boss 46 provided in the manual handle 44 rotates, and the rotation of the handle boss 46 is clutched. The male screw 11 of the stem bush 2 is rotated through the spline from the spline to the sleeve 48 via rotation of the sleeve 48, thereby engaging the female screw 11. The spindle 1 with the vertical movement moves, and the valve 5 fixed to the spindle 1 opens and closes the flow path 4. In the case of the vertical manual handle (not shown) of FIG. 5, when the manual handle is manually rotated, the handle boss 46 provided in the manual handle rotates, and the rotation of the handle boss 46 is performed by the sleeve ( The female screw 11 of 20 is rotated, and thus the spindle 5 having the male screw 10 engaged with the female screw 11 is moved up and down so that the valve 5 fixed to the spindle 1 is fixed to the flow path 4. Open and close

The valve actuator automatically controls the opening and closing of the valve 5 by the motor 12 at the command of the controller, or by the manual rotation of the manual handle 44 in the field, through the transfer system described above. The valve 5 can be opened and closed manually. The valve actuator can attach the motor 12 to one end of the worm shaft 29 on which the worm 9 is installed, via a gear transmission system, and to the other end side of the worm shaft 29. The linear potentiometer 49 (FIG. 6) which is a position sensor which detects a movement amount is attached. In the valve actuator, various information such as the state of the flow path 4 and the open / closed state of the valve 5 are processed by the control unit, and the torque of the spindle 1 to which the valve 5 is attached is a torque switch 50. ), The open / closed state of the valve 5 is detected by the limit switch 51, and the opening degree of the valve 5 is represented by an open gauge 52.

In the valve actuator, the female thread wear sensor is disclosed in detail as an apparatus for detecting wear of a screw of Applicant's Patent Application No. 2002-309679 according to the present applicant, and the description thereof is omitted here. Of course, other types of sensors can be applied to the female thread wear sensor. Here, the outline of the above-described thread wear detection device, that is, the female thread wear sensor, will be described with reference to FIGS. 5 and 6.

The internal thread wear sensor can apply the following things, for example. The thread wear amount sensor determines the gap amount between the male screw 10 and the female screw 11 based on the torque curve obtained along the axial movement amount of the worm 9, and at the same time, the stem bush 2 corresponding to the determined gap amount. Rotation speed of the stem bush (2) and multiplying the rotation speed of the stem bush (2) by the pitch of the female screw (11) to detect the amount of wear of the female screw (11). In addition, the rotation speed of the stem bush 2 is detected by rotation sensors, such as a rotary encoder attached to the outer peripheral side of the stem bush 2. The rotation sensor can be easily attached to the stem bush 2 by opposing the detection terminal 14 of a potentiometer to the slide contact 13 fixed to the stem bush 2. Moreover, the electric signal which follows the movement amount of the worm 9 in the axial direction is detected by the linear potentiometer 49 which is a position sensor shown in FIG. When the above is represented by a formula, it is as follows. The stem wear amount of the thread wear is ΔA, the pitch of the female thread 11 is P, and the female thread 11 corresponding to the gap amount between the female thread 11 and the male thread 10 due to the wear of the female thread 11 is fixed. When the rotation speed of (2) is represented by the rotation angle α, the following equation is obtained. That is, ΔA = P × (α / 360).

As shown in FIG. 6, the linear potentiometer 49 which is a position sensor is accommodated in the case 53 fixed to the housing 3, and the cover 54 fixed to the case 53. As shown in FIG. The linear potentiometer 49 is supported by the plate 55 fixed to the cover 54 and the case 53, and the joint 56 is attached to the edge part. The rotor shaft 58 rotatably supported by the bearing 57 provided in the joint 56 is in contact with the end face of the worm shaft 29 of the worm 9. Therefore, the amount of movement of the worm 9 is transmitted to the detection terminal 59 of the linear potentiometer 49 through the rotor shaft 58 and the joint 56 attached to the load slide. The movement amount of the detection terminal 59 of the linear potentiometer 49 is output as an electric signal, and is input to the controller as information on the movement amount of the worm 9.

In the valve actuator, measurement value information from various sensors 7, 28, 32, 33, 34, 36, and 37 is input to the control circuit 6, and these information are processed by the control circuit 6, and a predetermined value is determined. A display device 17 for digitally displaying characters is provided. In the valve actuator, although the transformer and the reversible are not included in the main body, these valve actuators are provided in the ship controller 40C, and the valves 5 are determined according to the controller instruction of the ship controller 40C by judging each detected measurement value. ) Can be controlled.

Next, the apparatus setting method of the self-diagnosis function will be described with respect to the valve actuator. The valve actuator turns the power switch ON. Check the normal display of the valve actuator display device 17. Regarding the position setting mode for setting the position of the valve 5, the position upper and lower limits of the valve 5 are set as the set value 61. The upper limit of the flow path 4 of the valve 5, that is, the opening limit value is set as the set value 61, and the lower limit of the flow path 4 of the valve 5, that is, the closing limit value is set. Set as. The set value 61 of the open limit value and the close limit value is detected by the rotation speed sensor 7 serving as an encoder or a potentiometer. The rotation speed sensor 7 accumulates or accumulates the rotation speed of the spindle 1, detects the rotation speed of the valve actuator, and sets it as state data for predicting the life of the seal of each slide part or each part. In addition, the upper limit value and the lower limit value of the torque applied to the valve 5 provided on the spindle 1 are set as the set value 61 of a predetermined value. The upper limit value and the lower limit value of the torque value at the time of valve opening and the torque value at the time of valve closing that are applied to the delivery device 24 of the spindle 1 with the valve 5 are set as predetermined values 61. In addition, the upper limit value and the lower limit value of the temperature of the motor 12 and the temperature of the control board 30 region are set as the set value 61 of a predetermined value. The motor 12 is set as the set value 61 within a predetermined temperature range of the upper limit value and the lower limit value in order to prevent the motor 12 from being pressed by the ambient temperature or malfunctioning due to the temperature of the electrical component. In the valve actuator, in the position setting, the torque setting, and the temperature setting, for example, the lower limit set value is controlled so that -100 pulses of the upper limit set value are the upper limit so that the lower limit set value does not exceed the upper limit set value. In the valve actuator, if the display device 17 confirms the normal display and has a predetermined set value 61, these settings are determined, and the display device 17 is returned to the normal display.

In the valve actuator, an abnormality display can be displayed on the display device 17. For example, when a torque abnormality occurs, the abnormal LED (LED) is turned on while the opening degree display of the flow path 4 by the valve 5 is continued and the opening / closing operation of the valve 5 is stopped. The fault output relay can be turned ON, thereby warning the torque fault, and when the fault is released, the fault LED is turned off, and the fault output relay is turned OFF. If an abnormality occurs, the error LED is turned on and the abnormal output relay is turned on in the state in which the opening degree of the flow path 4 is continued by the valve 5 and the opening and closing operation of the valve 5 is stopped, similarly to the torque abnormality. On, the temperature abnormality can be alarmed, and when the abnormality is released, the abnormal LED is turned off, and the abnormal output relay is turned off. Voltage, screw hemp The same applies to the simulation display, battery or encoder abnormalities, and communication abnormalities.

Next, with reference to Figs. 7, 8 and 9, an intelligent valve actuator as a second embodiment according to the present invention will be described.

The second embodiment is characterized in that the first embodiment is of an intelligent type, whereas the first embodiment has a self-diagnostic function. Here, the intelligent valve actuator further develops the valve actuator of the first embodiment and uses a motor 12 having a reversible 43 as a reversible electromagnetic contactor as a driving means, and sets a value in response to information from various sensors. While the input is changed, the motor 12 is driven to appropriately control the opening / closing state of the flow path 4 by the valve 5. That is, the second embodiment is an intelligent valve which is equipped with a motor 12 having a rotation speed sensor 7A made of an absolute encoder and a reversible 43, and which can be self-controlled by the control circuit 6. As the actuator, it is possible to achieve a self-diagnosis function, and to compare and determine the measured values for detecting various state data with the set values set by the predetermined setter 39, and drive the motor 12 to perform a program operation. It features.

In the second embodiment, parts and the like having the same functions as those in the first embodiment are denoted by the same reference numerals, and redundant descriptions are omitted here.

In the second embodiment, the spindle 1, the stem bush 2, the female screw 11 and the transmission device 24 are the same as in the first embodiment, but the motor 12 which is the driving device of the stem bush 2 is the same. Is provided with a reversible machine 43.

In the second embodiment, the various sensors provided to detect the data 31A, which is the state data of the valve actuator, include the torque sensor 28, the temperature sensors 33 and 34, the humidity sensor 36, and the valve opening sensor. As for the vibration sensor 37, the female thread wear sensor, and the current sensor 32, the same ones as those in the first embodiment can be used, but the rotation speed sensor 7A includes an absolute encoder that integrates the rotation speed. .

As shown in Fig. 7, the valve actuator is provided with a control circuit 6A and a display device 17A on the control board 30A. It is input to the control circuit 6A, processed by the control circuit 6A, and displayed on the display device 17A. In addition, since the second embodiment includes the rotational speed sensor 7A made of an absolute encoder, it is not necessary to provide a mechanical switch unit made of a limit switch or a torque switch as in the prior art, and the valve is used regardless of the presence or absence of a control power supply. The position of (5) can be detected and the adjustment of the position limit and the torque limit can be easily set from the outside without opening the cover or the housing 71. Moreover, the position setting of the valve 5 detects the rotation speed of the spindle 1 by the absolute encoder which comprises the rotation speed sensor 7A, detects the position of the valve 5, and The opening / closing limit by the valve 5 can be detected accurately and easily and input to the setter 39, and can be set. Moreover, in the objective operator who supplied the valve actuator, even when the total rotation speed for displaying the position of the valve 5 is changed, it can be easily adjusted, and it can contribute to cost reduction. Since the reversible machine 43 which is a magnetic switch was provided as the operation switch in the motor 12, it can be comprised by the structure which does not penetrate the housing 71 which covers the switch part 72, and the switch part 72 Penetration of water into) can be prevented.

The control circuit 6A compares each of the measured values of the state data with a threshold at each preset value 61 and compares them in the comparator 60 so that the measured values are in response to the information deviating from the set value 61. In addition to issuing processing instructions such as an exchange repair and an alarm, the motor 12 is driven through the reversible device 43, which is a driving means, in accordance with the program operation to appropriately open and close the flow path 4 by the valve 5. Can be controlled. In addition, the control circuit 6A compares each measured value of the state data with the threshold at each preset value 61 preset in the comparator 60 so that the measured value corresponds to the information within the range of the preset value 61. In response, it is possible to perform self-control such as issuing an operation maintenance processing command in an operation state as it is.

The controller 40A, which is composed of a personal computer (personal computer monitor) 65 and / or a radio wireless remote controller (remote control, wireless monitor) 64, is connected to a control board 30A provided in each of a plurality of valve actuators. It is possible to control the operation state of each valve actuator. That is, one controller 40A can independently control a plurality of valve actuators, respectively. In addition, the display device 17A can display the state data of the valve actuator, the set state of various set values, and the failure data of the valve actuator parts. The controller 40A instructs the operation maintenance processing command to continue to the next operation of changing the opening / closing state of the flow path 4 by the valve 5 by driving the motor 12 as a drive means in response to the measured values of various sensors. It is configured to get off and control. In addition, the controller 40A can control the set value 61 in response to the measured value through the communication unit 38 connected to the control circuit 6A and control the next operation in response to the measured value. The motor 12, each sensor, and the control circuit 6A are comprised so that electric power may be supplied and driven from the power supply via the terminal unit 45 (FIG. 9) by the controller 40A or the switch installed in the field.

In the second embodiment, for example, the control circuit 6A includes, for example, a rotation speed sensor 7A made of an absolute encoder, a torque sensor 28, a temperature sensor 33 for detecting the temperature of the motor 120, and a control board 30A. Flow path of the temperature sensor 34 for detecting the temperature of the sensor), the humidity sensor 36 for detecting the humidity of the electric component region of the control board 30A which is inside the housing 71 constituting the valve actuator, and the valve 5 A valve opening sensor for detecting the opening degree to (4), a vibration sensor 37 for detecting vibration of the drive system of the valve actuator, and a female screw 11 of the stem bush 2 engaged with the male screw 10 of the spindle 1. In response to the respective measured values inputted by the female thread wear sensor for detecting the wear of the head) and the data 31A for every predetermined period from the current sensor 32 for driving the motor 12, the respective measured values are displayed and converted. Displayed on LCD display device 17A through 62, and on control circuit 6A. And the information exchange with the controller (40A) through the inherited communication unit 38. The control circuit 6A also drives the valve actuator in response to the command value from the controller 40A. Therefore, the controller 40A can confirm the diagnosis contents of the valve actuator via the communication unit 38 and the various states of the controller 40A to the control circuit 6A by the remote control 64, the personal computer 65, or the like. The data can be set appropriately or the motor 12 can be driven to operate.

In addition, the controller 40A, like the controller 40, has a poor wiring of the heater provided in the valve actuator, a cover attachment defect constituting the housings 3, 71, and a cover in accordance with the measured value by the humidity sensor 36. The flooding situation can be predictively controlled based on the predetermined data 31A.

In addition, the display device 17A is constituted by an LCD, that is, a liquid crystal display, which is a digital display, and can confirm various set values and operating states relating to the valve actuator. Since the second embodiment is an electronic open meter, a guide open meter with gear transmission as in the prior art is unnecessary. In the display device 17A, in particular, the number of operations of the valve 5, the opening and closing torque for opening and closing the flow path 4 of the valve 5, the temperature and humidity of the electric component region provided in the motor 12 or the control board 30A. While the wear state of the female screw 11 is displayed, the set value 61 of these upper and lower limits can be displayed. In addition, the display device 17A samples data 31A of the measured values from the current sensor 32, the temperature sensor 33, the rotation speed sensor 7A, and the torque sensor 28, and these data 31A. ) Is displayed on the LCD through the display converting means (62). The measured value of the rotation speed sensor 7A is sampled with the data 31A through the pulse 63 / V converter 63.

In addition, the controller 40A can predictively control the life of the slide portion of the valve actuator component and each seal based on the predetermined data 31A according to the measured value by the rotation speed sensor 7A. Further, the controller 40A gives an instruction to the control circuit 6A, so that the control circuit 6A itself is a motor that is a driving means in accordance with the measured values by the temperature sensors 33 and 34 made of a thermocouple or the like. (12) Deterioration of the electrical component can be predicted and self-controlled based on the predetermined data 31A.

In the second embodiment, the current sensor 32, the torque sensor 28, the female thread wear sensor, the wear amount of the female screw 11, the set value of the temperature by the temperature sensors 33 and 34, and the humidity sensor 36 The power transmission system which opens and closes the flow path 4 to the valve 5 via the transmission device 24 by the motor 12 or the handwheel 44 by the set value of the humidity by the same as that of the first embodiment. .

According to the second embodiment, the valve 5 is automatically opened and closed by the drive of the motor 12 having the reversible 43 in accordance with the instruction of the controller 40A or the magnetic control of the control circuit 6A. Moreover, in the field, the valve 5 can be opened and closed manually by the manual rotation of the manual handle 44.

In addition, in the second embodiment, the female thread wear sensor is the same as that of the first embodiment, but the rotation speed of the stem bush 2 is an absolute encoder attached to the outer circumferential side of the stem bush 2 via the screw gear 68. It is detected by the rotation speed sensor 7A. The rotation speed sensor 7A can be easily attached to the stem bush 2 by opposing the detection terminal 14 of the potentiometer to the slide contact 13 fixed to the stem bush 2.

In the second embodiment, information of measured values from various sensors 7A, 28, 32, 33, 34, 36, 37 is input to the control circuit 6A, and these information are processed by the control circuit 6A. And a display device 17A for digitally displaying a predetermined number of characters, which are not shown. However, an emergency stop switch for stopping a power switch and a valve actuator of a power supply device having a transformer in case of emergency, and central control. A telecommunication switch for exchanging information with the apparatus, etc. is provided, and a reversible machine 43 is provided in the motor 12 operated by three-phase alternating current. In the second embodiment, the actuator is controlled by a transformer or a reversible unit 43 installed in the main body in accordance with the information obtained by the self-diagnosis function. 71).

Next, with respect to the second embodiment, the setting method of the apparatus relating to the self-diagnosis function is generally the same as in the case of the first embodiment, and the description thereof is omitted here.

In the second embodiment, the set value 61 of the open limit value and the close limit value for the flow path 4 of the valve 5 is detected by the rotation speed sensor 7A serving as an absolute encoder. The rotation speed sensor 7A detects the rotation speed of the spindle 1 by accumulating, ie, accumulating the rotation speed of the spindle 1, and sets it as state data for predicting the life of the slide part or the seal of each part. In the second embodiment, the rotational direction of the spindle 1, that is, whether to rotate the flow path 4 of the valve 5 in the opening direction or the closing direction is set, and then the LS operation mode is set. In the second embodiment, remote communication is set, such operation is performed to end the setting processing of various state data, and the display device 17A is returned to normal display.

Since the valve actuator having the self-diagnosis function according to the present invention is configured as described above, it is possible to detect and display abnormality or lifespan in advance, and to prevent the failure of the actuator, thereby preventing the occurrence of an accident due to the failure. In addition, when replacing worn parts, it is sufficient to replace only the defective parts, which can reduce the number of regular inspections, reduce operating costs, and also check the maintenance maintenance time by the self-diagnosis function. It is possible to easily set various types of devices, to reliably set various state data, and to drive-control the valve state by the objective controller, contributing to the reduction of management cost.

In addition, since the intelligent valve actuator according to the present invention is configured as described above, a program operation is performed by a second control circuit built into the second control board, and the state monitoring maintenance by the self-diagnosis function, that is, maintenance maintenance timing Etc., and various settings for devices such as each sensor can be easily and surely set. In addition, the valve actuator can be installed by using an absolute encoder or reversible to reduce the number of parts, to reduce the manufacturing cost and to reduce the failure rate, and furthermore, to adjust the position limit and the torque limit from the outside without opening the case. It is possible to easily perform the case, the case can be configured in a non-penetrating structure, it is possible to prevent the intrusion of water into the switch portion, it is possible to reduce the failure rate. In the valve actuator, a conventional valve actuator includes a limit switch transmission unit and a transmission unit to an opening system based on a guideline by mechanical gear transmission, so that the number of parts increases, and the limit of each limit, that is, the adjustment of the set value is increased. Special technology is required, and regular inspections have to be made to check for any abnormality. However, the parts and work as described above are unnecessary. Furthermore, in the conventional opening system, the total rotational speed of the sleeve shaft is converted into a motion of 0 to 270 °. For this reason, although the combination of the reduction gear is complicated, since the present invention is a digital liquid crystal display, a conventional gear device can be made unnecessary.

Claims (17)

A housing having a valve for opening and closing a flow path, a spindle supported to be movable up and down in the housing for opening and closing the flow path by the valve, and a female screw threaded to a male screw installed on the spindle. A transmission device having a stem bush rotatably supported on the stem bush and a worm wheel fixed to the stem bush and a worm which is engaged with the worm wheel to rotate the stem bush to move the spindle up and down to transmit rotation from a driving means. In the valve actuator provided with, A setter for setting a predetermined predetermined set value of state data; Various sensors each detecting a measurement of the state data; A first control circuit for comparing and judging the measured value and the set value and starting the process of repairing or replacing parts or an alarm in response to information in which the measured value deviates from the set value; A first display device for displaying the measurement value by the sensor and simultaneously displaying the processing started from the first control circuit; A first control board having a communication unit connected to said setter, said first display device and a first control circuit; And a first controller for displaying the measured value through the communication unit and operating the driving means through the first control circuit in response to the information. The female thread wear sensor which detects the wear amount of the said female thread among the said various sensors is a torque obtained according to the axial movement amount of the said worm measured by the torque sensor which detects the torque loaded to the said spindle by the said 1st control circuit. Determining a gap amount between the male screw and the female screw based on a curve, and a first rotation speed sensor detecting the rotation speed of the spindle detects the rotation speed of the stem bush corresponding to the gap amount; A valve actuator having a self-diagnosis function, characterized by detecting the amount of wear of the female screw by performing a calculation of the rotational speed of the stem bush by the pitch of the female screw. The method of claim 1, The sensor for detecting the state data includes: the first rotation speed sensor having an encoder that integrates the rotation speed of the spindle in order to detect a valve position and detect an opening degree of the valve flow path; A torque sensor, a temperature sensor for detecting the temperature of the motor as the driving means and the first control substrate region, a humidity sensor for detecting the internal humidity of the valve actuator, a vibration sensor for detecting the vibration of the valve actuator, and the motor A valve actuator having a self-diagnosis function, comprising: a current sensor for detecting a starting current to be driven to detect a driving frequency. The method of claim 2, The first control circuit compares the measured values and the set values of the first rotational speed sensor, the torque sensor, the temperature sensor, the humidity sensor, the vibration sensor, the female thread wear sensor, and the current sensor to compare the abnormality with the abnormality information. I) outputting a signal and exchanging information with said first controller via said communication unit to operate said drive means via said first control circuit by a command from said first controller; Valve actuator with diagnostic function. delete The method of claim 1, The first display device has a self-diagnostic function, characterized in that the LCD displays the measured values of the state data, a predetermined set value of the state data, and various types of fault data or abnormal information of the parts. Valve actuator. The method of claim 1, And said first controller is a target control device, a personal computer, and a wireless remote controller. The method of claim 2, The first controller has a self-diagnostic function, characterized in that it predicts and controls various kinds of information on the deterioration of components of a motor or an electronic element which is the driving means based on the predetermined state data according to the measured value by the temperature sensor. Valve actuator. The method of claim 2, The first controller is capable of predictive control of various types of information on wiring failure, cover attachment failure, and immersion into the cover based on the measured value by the humidity sensor based on the predetermined state data. Valve actuator with diagnostic function. A stem attached to a valve for opening and closing a flow path and having a spindle supported to be movable up and down in the housing, a female screw screwed to a male screw installed on the spindle, and a stem bush rotatably supported by the housing; A valve actuator having a worm wheel fixed to the stem bush and a transmission device having a worm in which rotation from a driving means is transmitted in order to move the spindle up and down, A reversible device installed in a motor constituting the drive means; A setter for presetting an appropriate setpoint of the state data; Various sensors each detecting a measurement of the state data; Comparing the measured value with the set value in response to the measured value by the sensor and operating the drive means and performing a program operation in response to the information in which the measured value deviates from the set value, thereby appropriately controlling the opening and closing state of the flow path by the valve. A second control circuit; A second display device for displaying the measurement value and displaying a part replacement repair or alarm processing in response to the information generated from the second control circuit; A second control board having a communication unit connected to said setter, said second display device and said second control circuit; And a second controller configured to appropriately control the opening / closing state of the flow path by the valve by inputting and changing the measured value, the information display, and the set value through the communication unit, The female thread wear sensor which detects the wear amount of the said female thread among the said various sensors is a torque obtained according to the axial movement amount of the said worm measured by the torque sensor which detects the torque loaded to the said spindle by the said 2nd control circuit. Determining a gap amount between the male screw and the female screw based on a curve, and a second rotation speed sensor detecting the rotation speed of the spindle detects the rotation speed of the stem bush corresponding to the gap amount; An intelligent valve actuator, characterized in that the amount of wear of the female screw is detected by performing a calculation that multiplies the rotational speed of the stem bush by the pitch of the female screw. 10. The method of claim 9, The sensor for detecting the state data includes the second rotation speed sensor, the torque sensor, and the drive having an absolute encoder that integrates the rotation speed of the spindle to detect a valve position and detect an opening degree of the valve flow path. A temperature sensor for detecting a temperature of the motor and the second control substrate region, a humidity sensor for detecting an internal humidity of the valve actuator, a vibration sensor for detecting vibration of the valve actuator, and a starting current for driving the motor. An intelligent valve actuator, comprising: a current sensor for detecting the number of operations by detection. delete 10. The method of claim 9, And said second controller controls a control circuit of said second control board respectively provided on said plurality of valve actuators. 10. The method of claim 9, The said 2nd controller is a personal accumulator and a wireless remote controller, The intelligent valve actuator characterized by the above-mentioned. 10. The method of claim 9, And said second display device is an LCD for displaying said state data, setting states of said various set values, and various types of failure data and abnormal information of parts. 10. The method of claim 9, The second controller intelligently predicts and controls various pieces of information on the slide portion of each component and the life of each seal based on the predetermined state data in accordance with the measured value by the second rotation speed sensor. Valve actuator. The method of claim 10, And said second controller predictively controls various types of information on the deterioration of components of a motor or an electronic device which is said driving means based on said predetermined state data according to the measured value by said temperature sensor. The method of claim 10, The second controller intelligently predicts and controls various types of information about a wiring failure of the heater, a cover attachment failure, and a flooding condition into the cover based on the predetermined state data according to the measured value by the humidity sensor. Valve actuator.

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