JP2020153523A - State recording device for automatic valve - Google Patents

Abstract

To provide a state recording device for an automatic valve which is attached to the automatic valve arranged at piping equipment in an operation while maintaining size compactness without being dismantled, and can confirm an operation state of each automatic valve in its installation site.SOLUTION: A state recording device for an automatic valve comprises: an accessory attachment seat formed at an upper part of an automatic operation actuator which is mounted to a valve main body composed of a rotating valve; an accommodation unit detachably arranged at the attachment seat; an angle detection element arranged at the accommodation unit; and a rotating element attached to a control shaft of the actuator. The device is arranged so as to be capable of detecting a rotation angle of the rotating element by the angle detection element when the accommodation unit is attached to the attachment seat, the angle detection element is connected to a memory via a CPU, the CPU is in a power-saving state normally, the power-saving state is released when an operation of the actuator is detected, and angle data detected by at least the angle detection element are accumulated in the memory.SELECTED DRAWING: Figure 2

Description

The present invention relates to a state recording device for an automatic valve for recording a state such as opening / closing and rotation angle of an automatic valve automatically operated by an actuator or displaying and checking the state on the outside.

Conventionally, for example, a large number of valves are arranged in the pipelines of piping equipment of various plants, and actuators are generally mounted for automatic operation of each valve. In this case, for example, when automatically operating a rotary valve such as a ball valve or a butterfly valve, a pneumatic actuator is often used because it can be miniaturized with a simple configuration and is excellent in terms of cost. An automatic valve is constructed by installing a pneumatic actuator.

As this type of pneumatic actuator, for example, the pneumatic actuator of Patent Document 1 has been filed by the applicant. Normally, the pneumatic actuator has a structure in which a piston that can reciprocate by linear motion is mounted in the cylinder as in Document 1, and the piston motion is converted into rotary motion and can be output to the output shaft (control shaft) side. It is provided.

In this case, normally, accessories such as a proximity switch, a limit switch, and a switch box that operate in conjunction with the control shaft of this actuator are mounted on the upper part of the pneumatic actuator, and the valve is opened / closed / intermediately opened by these accessories. Etc. are provided so that they can be detected. The switch box is placed on a mounting seat surface provided on the upper part of the actuator in a state where the shaft shaft provided on the lower surface side is connected to the control shaft of the actuator, and is fixed by bolting.

For example, Patent Document 2 and Patent Document 3 are disclosed as actuators equipped with such accessories. In Patent Document 2, a unitized operation status detection device is fixed to the upper part of the actuator, and changes in the operation status of the actuator and the valve can be monitored via the operation status detection device. It is sent to an external terminal device through a communication circuit. In Patent Document 3, a device is integrally attached to an actuator, the actuator is controlled by this device, and the information is provided so as to be communicable.

By the way, when the actuators disclosed in Patent Documents 1 to 3 described above are used in a simple plant or device that does not have an advanced instrumentation system such as a fieldbus, the operating conditions of these actuators and automatic valves can be checked. It may be necessary to check on-site. Therefore, for example, an indicator may be provided on the output shaft side of the actuator, and the state of the indicator may be visually confirmed on site.

Japanese Patent No. 4376780 Japanese Patent No. 3873020 Special Table 2009-505009

As in Patent Documents 1 to 3 described above, in the case of a configuration in which an accessory is mounted on the upper part of the pneumatic actuator and the operating state of the automatic valve can be monitored from the control room of the plant or the like via this accessory, the system is simplified. In many cases, it is not expected to confirm the operating status of the automatic valve at the site due to the change. In this case, it becomes difficult to check the open / closed / intermediate opening state and the rotation direction of the valve body for each automatic valve at the site. Even if the indicator is provided on the output shaft side, if the valve or actuator is installed in a complicated pipeline or in a narrow place, it will be difficult to directly see the indicator on site, and the operating status can be checked. It may not be possible.

As a countermeasure, even if a device for recording and displaying the operating status of the automatic valve is newly installed on the existing actuator, if the actuator needs to be disassembled, the installation work becomes complicated and easy. It will not be possible to wear it. Moreover, since the accessories that operate in conjunction with the control shaft are provided above these pneumatic actuators, it is difficult to newly provide a recording / display device due to the mounting space. On the other hand, when the recording / display device is attached to the side of the actuator, the entire actuator may become large and cannot be arranged in the pipeline.

In addition to these, when the recording / display device is attached to the actuator mounted on the existing automatic valve, the automatic valve is operating because the plant to which the automatic valve is installed may be in operation. It is difficult to carry out the initial setting work of the device without it.

The present invention has been developed to solve the conventional problems, and the purpose of the present invention is to maintain the overall compactness of the existing piping equipment without disassembling the actuator for automatic operation. It is an object of the present invention to provide a state recording device for an automatic valve, which is mounted on an automatic valve provided in the above and can check the operating state of each automatic valve at the installation site.

In order to achieve the above object, the invention according to claim 1 is to attach an accessory formed on the upper part of an automatic operation actuator mounted on a valve body including a rotary valve to the automatic valve state recording / display confirmation device. A seat, a storage unit that can be mounted on the mounting seat, an angle detection element provided on the storage unit, and a rotating element mounted on the control shaft of the actuator are provided, and the storage unit is mounted on the mounting seat. At that time, the rotation angle of the rotating element is detectably provided by the angle detecting element, and the angle detecting element is connected to the memory via the CPU. The CPU is normally in a power saving state, and the operation of the actuator is detected. This is an automatic valve state recording device in which the power saving state is released at that time and at least the angle data detected by the angle detecting element is stored in the memory.

According to the second aspect of the present invention, the air pressure taken in and out of the actuator is measured by a pressure sensor, and when the actuator starts to be driven, the air pressure is detected by the pressure sensor, and the CPU saves power by this detection. It is a state recording device for an automatic valve that is released from the state.

According to the third aspect of the present invention, the rotation direction of the actuator is detected by using a pressure sensor based on the magnitude relationship between the air pressure on the OPEN side and the air pressure on the CLOSE side supplied to the cylinder of the actuator. It is a recording device.

The invention according to claim 4 is an automatic valve state recording device in which the storage unit has a storage unit, and a communication module capable of communicating with the storage unit is mounted on the pressure sensor.

According to the invention of claim 1, it has a storage unit that can be mounted on the accessory mounting seat on the upper part of the actuator for automatic operation, and a rotating element that is mounted on the control shaft, and an angle provided in the storage unit. Since the rotation angle of the rotating element can be detected by the detecting element, it can be mounted on the automatic valve of the existing piping equipment in operation without disassembling the operating actuator. Moreover, the overall compactness is maintained even after installation, and it can be installed with simple work without changing the piping condition. Even if the operating condition cannot be directly seen after this installation, each automatic valve operates at the installation site. The status can be recorded and displayed externally for confirmation.
Further, normally, the CPU is in the power saving state, and when the operation of the actuator is detected, the power saving state of the CPU is released, and the angle data detected by the angle detecting element is stored in the memory. It also contributes to energy saving by suppressing power consumption as much as possible.

In addition, without removing the existing actuator from the accessory mounting seat, it can be easily mounted so as to sandwich the plate-shaped fixing portion from a substantially horizontal direction. Moreover, the accessory mounting seat is provided according to the NAMUR standard, which is an interface standard for actuators that are widely adopted, and the fixed part has a shape corresponding to this accessory mounting seat, so that it has a wide range of compatibility and is already installed. It is possible to easily record the state and check the display of the actuators and valves of the above without having to replace them or require separate mounting parts.

In addition, by configuring the rotating element consisting of the magnetizing indicator as a part of the flat cylindrical split body, it is possible to mount this magnetizing indicator from the side of the control shaft without removing the actuator. Become. In this case, since the square shaft of the control shaft is sandwiched between the divided bodies from the circumferential direction and mounted integrally, the magnetizing indicator can be automatically mounted on the control shaft in the positioned state, and the displacement with respect to the angle detection element is prevented. Will detect with high accuracy.

Further, the magnetizing width of the magnetized portion of the magnetizing indicator is set to be smaller than the sum of the backlash of the gear transmission mechanism, the backlash at the connection portion between the actuator and the valve, and the seat width of the valve. The opening degree at the start of the opening operation and the closing operation can be accurately detected via the magnetizing indicator and the angle detecting element without being affected by individual differences of the actuator and the valve.

In addition, by displaying the angle data and its transition on the mobile terminal via the short-range communication module, even if the valve body or actuator is installed in a complicated pipeline or in a narrow place, it is not possible to directly see them. It can be confirmed by recording and displaying the operating state from a close position via the mobile terminal.

Further, the operating actuator can be installed in the existing piping equipment in operation without disassembling, and the operating status such as the open / closed state of the valve and the intermediate opening can be recorded and displayed via an external mobile terminal. Moreover, it can be easily constructed without changing the pipeline of the existing piping equipment. Even if the operating state cannot be directly visually recognized, the operating state can be confirmed at the installation site.

According to the invention of claim 2, since the pressure sensor is used, it can be attached by simply removing the plug or the like without disassembling the actuator or the air supply / exhaust piping.

According to the invention of claim 3, for example, when the relationship is changed from the air pressure on the OPEN side> the air pressure on the CLOSE side to the air pressure on the OPEN side <the air pressure on the CLOSE side, the rotation direction from "open" to "closed". Can be detected.

According to the invention of claim 4, it is possible to communicate air pressure data and the like between the accommodating portion of the storage unit and the pressure sensor via the communication module.

It is a separation perspective view which shows the automatic valve. It is a partially omitted plan view which shows the mounting state of the state recording / display confirmation device for an automatic valve of this invention. (A) is a schematic diagram showing a rotating element in a fully closed state of an automatic valve. (B) is a schematic view showing a rotating element in a fully open state of an automatic valve. It is a separation perspective view which shows the state recording | display confirmation apparatus for an automatic valve of this invention. It is a developed view of a magnetizing indicator. It is a cross-sectional view of an actuator.

Hereinafter, the automatic valve status recording / display confirmation device, the automatic valve status recording / display confirmation system, and the automatic valve in the present invention will be described in detail based on the embodiments. FIG. 1 is a separate perspective view of an automatic valve, and FIG. 2 is a partially omitted plan view of a state in which the state recording / display confirmation device for an automatic valve of the present invention is attached.

In FIGS. 1 and 2, the automatic valve state recording / display confirmation device of the present invention includes a storage unit 1 and a rotating element 2.
The storage unit 1 is provided so as to be mounted on an accessory mounting seat 10 formed on the upper portion of an automatic operation actuator 4 mounted on a valve body 3 including a rotary valve, and as shown in FIG. 3, a substantially rectangular parallelepiped is stored. A long plate-shaped fixing portion 12 for fixing to the actuator 4 is provided on both sides of the portion 11 and the accommodating portion 11.

The fixing portion 12 is formed in a shape corresponding to the mounting seat 10 formed on the upper portion of the actuator 4 according to the NAMUR standard. Here, the NAMUR standard is a standard interface standard (VDI / VDE3845-2010) for an actuator, and defines dimensions for mounting a valve and mounting accessories on the upper part of the actuator. That is, the fixing portion 12 is provided in a shape that can be mounted on the mounting seat 10 formed by the interval, width, and length defined by the NAMUR standard, and is provided so as to be mounted on the mounting seat 10 from a substantially horizontal direction. ing. In each fixing portion 12, a long groove 13 having one end open is formed at a position corresponding to a bolt hole 14 provided in the mounting seat 10 according to the NAMUR standard.

In FIGS. 3A and 3B, the accommodating portion 11 is made of resin, and the lid 15 shown in FIG. 2 is fixed to the opening side above the accommodating portion 11 by a fixing means such as ultrasonic welding. .. An angle detection element 20, a CPU (central processing unit) 21, a memory 22, an LED (light emitting diode) 23, a communication module 25, a power supply 26, and an IC tag 27 are mounted inside the accommodating unit 11.

The angle detection element 20 is composed of a Hall IC that outputs an ON / OFF signal according to the strength and polarity of the magnetic field, and when the storage unit 1 is mounted on the actuator 4, it is mounted on the side surface of the control shaft 28 of the actuator 4. It is built in the position where it faces each other. The angle detection element 20 is connected to the memory 22 via the CPU 21, and the angle detection element 20 is provided so as to be able to detect the rotation angle of the rotation element 2 mounted on the control shaft 28.

The CPU 21 is normally in a power saving state, and while receiving data from the angle detection element 20 and the air pressure sensor (pressure sensor 40) described later, the CPU 21 is in a state in which these data are not stored in the memory 22. Then, when the operation of the actuator 4 is detected, the power saving state is released, and at least the angle data of the rotating element 2 detected by the angle detecting element 20 is stored in the memory 22. After a predetermined time has elapsed from the state in which the operation of the actuator 4 is not detected, the power saving state is restored. The CPU 21 is also connected to the communication module 25.

A non-volatile memory 22 is used, and the LED 23 is provided for aligning the hall IC 20, and when the hall IC 20 and the rotating element 2 are arranged at a position where the rotation angle of the control shaft 28 can be detected. , Is provided to light up.

The communication module 25 is preferably a short-range wireless communication module, and in this example, Bluetooth (registered trademark) is used. At least the angle data of the rotating element 2 by the angle detecting element 20 and its transition are communicated with an external mobile terminal (not shown) via the communication module 25, and the automatic valve is communicated by this mobile terminal via a dedicated application. It is possible to record the status and check the display.

The power supply 26 comprises, for example, an independent power supply using a button battery, and a disk-shaped battery lid 31 shown in FIG. 2 is formed in the lid 15 via a seal member (not shown) at the attachment / detachment position of the button battery 26. It is engaged and fixed to the portion 32, and is provided to be detachably attached by rotating it by a predetermined angle with a flat-blade screwdriver or the like. Each element of the angle detection element 20, the CPU 21, the memory 22, the LED 23, and the communication module 25 is connected to the power supply 26 and serves as a drive source for these elements.

Unique information of the actuator 4 and the valve body 3 is accumulated in the IC tag 27, and the information includes at least (1) the model and order number of the actuator 4 and the valve body 3, and (2) the URL for downloading the application software. And these stored information are input by a dedicated terminal or the like (not shown). The URL for downloading the application software is for a mobile terminal, and the application software can be obtained from this URL for download.

The storage unit 1 described above has a data measurement function and a function of accumulating the measurement data. There are two types of data to be measured: (1) angle data on the actuator control shaft 28 for each hour, and (2) air pressure data for the actuator 4 for each hour, which will be described later. These obtained data are the hall IC 20 and the data obtained. It is obtained by the rotating element 2 and the air pressure sensor (pressure sensor) 40 described later, and is stored in the memory 22 via the CPU 21.
In this case, these data are stored in the memory 22 at regular intervals from the CPU 21 after being subjected to so-called "thinning out" or simple data processing such as an average value of the data. It may be set to.
The data stored in the device is transmitted to the mobile terminal via the short-range wireless communication module 25 which is Bluetooth in response to the request from the mobile terminal, and the state record of the actuator 4 and the valve body 3 is displayed and confirmed by this mobile terminal. Will be done.

On the other hand, the actuator 4 on which the storage unit 1 is mounted may be a rack and pinion type, a scotch yoke type, or a double-acting type or a spring-return type single-acting type. In this embodiment, a double-acting rack-and-pinion actuator 4 having a rack 73 and a pinion 74 shown in FIG. 6 is used.

In FIGS. 1, 2, and 4, a control shaft 28 is provided so as to project from the upper portion of the actuator 4, and at least an outwardly protruding portion of the control shaft 28 is provided by a square shaft 29 having a rectangular cross section. There is. A two-sided width groove and a central female thread portion are formed on the upper part of the control shaft 28 based on the NAMUR standard, and the bracket 41 is attached to the actuator 4 while the lower shaft (not shown) is connected to the two-sided width groove. The switch box 42, which is an accessory, is mounted via the switch box 42. Switches such as a micro switch and a potentiometer (not shown) are built in the switch box 42. Intake / exhaust holes 44, 45 into the cylinder 43 are provided on the side portion of the actuator 4, and intake / exhaust passages 33, 34 are connected to the intake / exhaust holes 44, 45. Note that FIG. 2 shows the actuator 4 in a state where the switch box 42 is omitted.

The mounting seats 10 described above are provided near both sides of the control shaft 28 on the upper part of the actuator 4 based on the NAMUR standard. A fixing portion 12 of the storage unit 1 is provided so as to be mounted on the mounting seat 10, and the fixing portion 12 is provided so as to be fixed by a mounting bolt 46 via a long groove 13.

In FIGS. 3A and 3B, the rotating element 2 is a magnetizing indicator and is used in pairs with the Hall IC 20 described above, whereby a magnetic rotary encoder is configured. The magnetizing indicator 2 is formed of a ferrite material into a flat cylindrical shape, and is configured as a part of a divided body 50 divided into two at a 180 ° position. When the divided bodies 50 are combined, a square hole 51 into which the square shaft 29 on the upper part of the control shaft 28 can be fitted is formed in the center thereof, and the square hole 51 is sandwiched between the divided bodies 50 from the side. The split body 50 is integrally mounted on the square shaft 29 in a state where the square shaft 29 is fitted to the square shaft 29.

A magnetizing portion 60 is provided on the side surface of the magnetizing indicator 2 on the Hall IC 20 side, which is one side of the divided body 50, and as shown in the developed view of FIG. 5, the magnetizing portion 60 has an S pole and an N. The poles are magnetized alternately. The magnetizing widths H of the S pole and the N pole of the magnetizing portion 60 are the backlash of the gear 62 used in the transmission mechanism 61 and the like built in the actuator 4 of FIG. 6 and the stem 66 of the valve body 3. It is set to be smaller than the sum of the mechanical backlash at the connection portion of the actuator 4 with the output shaft (control shaft) 28 and the seat width (valve seat seal width) of the valve body 3 of FIG. Here, the seat width of the valve body 3 means the contact width between the valve body 63 and the seat ring 64 in the butterfly valve in the present embodiment.

In the developed view of FIG. 5, the magnetized region of the magnetized portion 60 has a width of 120 ° so as to have a margin of 15 ° in the front-rear direction with respect to 90 °, which is the opening / closing angle of the actuator 4, out of approximately 180 °. Within this range of 120 °, 26 pulses, that is, magnetizing portions 60 of a total of 26 poles are arranged alternately with S poles and N poles. In the figure, for convenience of explanation, the number of S poles and N poles is omitted and 10 poles are shown.

In this case, the magnetizing width H is provided narrowly in the region α near the fully open position and the fully closed position of the actuator 4, and is provided wider than these in the region β near the intermediate opening position. As a result, in the region α of the fully open position and the fully closed position, which is the operation start position of the actuator 4, the opening position is set to be relatively finely detectable.

In the present embodiment, when the divided body 50 has a diameter of φ40 mm, the magnetizing width H in the vicinity of the fully open position or the fully closed position is set to 1 mm with respect to the magnetizing indicator 2. When this is converted into an angle, it corresponds to about 3 °, and this angle is set to be smaller than the sum of the angles corresponding to the backlash angles of the actuator 4 and the valve body 3 and the seat width.

Here, the angle detection state in the opening operation from the fully closed state will be described in detail. Even if the intake / exhaust of the actuator 4 is switched by a solenoid valve (not shown), the backlash of the transmission mechanism 61 built in the actuator 4 causes the actuator 4 to operate. The control shaft 28 does not immediately show an open operation. Further, even when the opening operation is started, the operating torque is high and the opening operation is gentle while the valve body 63 of the valve body 3 is in contact with the seat ring 64 in a sealed state.
Therefore, the angle detection element crosses the boundary between the S pole and the N pole in the magnetized portion 60 at least once while being affected by the backlash or while the valve body 3 is in the valve seat sealed state. The magnetizing width H is set so that the ON / OFF signal at 20 can be output. As a result, the opening degree at the start of the opening operation and the closing operation can be accurately detected.

More specifically, in the 120 ° magnetizing region, the magnetizing width H of each pole is 1 mm (angle of about 3) in the region α of 30 ° from each end including the above-mentioned fully open position and fully closed position. It is set to (corresponding to °), which results in a total of 10 pulses (10 poles) in each region α. On the other hand, in the intermediate region β (that is, the range of 60 ° near the center of the magnetizing region), the magnetizing width H of each pole is set to 3 mm (corresponding to an angle of 10 °), and a total of 6 pulses (6). Pole) is obtained. As a result, the number of pulses at the intermediate opening degree is reduced, but at this intermediate opening degree, the rotation of the control shaft 28 is also in a fast region, so that sufficient angle detection is possible.
In this way, while the magnetizing width H is changed according to the opening degree of the actuator 4, it is possible to detect the approximate opening degree of the actuator 4.

The other side (the side far from the hall IC 20) of the divided body 50 with the magnetizing indicator 2 is provided by a support member 65 for holding the magnetizing indicator 2, and the magnetizing indicator 2 and the supporting member 65 are shown in the drawing. It is ring-shaped and mounted on the control shaft 28 by snap-fit fitting.

When obtaining air pressure data, in FIG. 6, the pressure sensor 40 is connected to intake / exhaust holes 44 and 45 via joints such as a cheese pipe 70 and a nipple pipe 71, and is sucked and exhausted by the pressure sensor 40 to the actuator 4. Air pressure is provided so that it can be measured. A speed controller 72 is provided on the intake / exhaust side of the pressure sensor 40, and the cylinder speed is adjusted by the speed controller 72. A short-range wireless communication module 25 such as Bluetooth is mounted on the pressure sensor 40 as well as the accommodating portion 11 of the device, and is provided so as to be able to communicate with the accommodating portion 11 of the device.

Joints such as the cheese pipe 70 and the nipple pipe 71 are connected to the intake / exhaust holes 44 and 45 in advance when the valve body 3 and the actuator 4 are installed, and the branch portion of the cheese pipe 70 is closed with a plug or the like (not shown). It is good. When the pressure sensor 40 is used, it can be attached by simply removing the plug or the like without disassembling the actuator 4 or the intake / exhaust piping.

The pressure sensor 40 may be arranged directly in the cylinder 43 in addition to the connection to the air supply / exhaust holes 44 and 45. Specifically, the stopper bolt 76 that regulates the operating range of the piston 75 shown in FIG. 6 is formed in a hollow shape in advance, and the pressure is applied to the stopper bolt 76 integrally or separately from the nut 77 that fixes the stopper bolt 76 to the main body of the actuator 4. Connect the sensor (not shown).

With the above configuration, the pressure in the cylinder 43 can be directly or indirectly detected by the pressure sensor 40 via the intake / exhaust passages 33 and 34.

The valve body 3 shown in FIG. 1 is a rotary valve, a so-called quarter turn valve, such as a ball valve or a butterfly valve in which a valve body 63 such as a ball or a disc is opened / closed or operated at an intermediate opening degree by rotating at approximately 90 °. In this embodiment, a butterfly valve is used.

An actuator 4 is mounted on the valve body 3, a storage unit 1 having a hall IC 20 is mounted on a mounting seat 10, an automatic valve is provided while a magnetizing indicator 2 is mounted on a control shaft 28, and this automatic valve is used. A status recording / display confirmation system is configured.

As the mobile terminal used in the automatic valve status recording / display confirmation system, for example, a smartphone or tablet (not shown) is used. In this case, as functions related to data input, for example, (1) a function of receiving data or unique information from the device, (2) a function of transmitting data or unique information received from the device to a server (not shown), ( 3) It has a function to retain GPS (Global Positioning System) position information and camera images and transfer them to a server.

(1) In the function of receiving data and unique information from the device, the angle data and air pressure data at the time of rotation of the control shaft 28 are received via the communication module 25, while the unique information of the actuator 4 and the valve body 3 is received. Is received via the IC tag 27.

(2) In the function of transmitting data and unique information received from the device to the server, for example, a medium-range wireless communication module such as LTE (Long Term Evolution) or Wi-Fi (Wi-Fi) (not shown) is used. These are sent to the server. In this case, the measurement data such as the angle and the air pressure are not processed.

(3) The function of holding GPS position information, camera images, and the like and transferring them to the server is an optional function, and in this function, the state of the actuator 4 taken by the camera of the mobile terminal is transmitted to the server.

On the other hand, as functions related to data output using a mobile terminal, for example, (1) a function of displaying information received from a server based on data transmitted to a server, and (2) receiving from a device without going through a server. It has a function to display an abnormal flash report determined by the application software based on the obtained information.

(1) In the function of displaying the information received from the server based on the data transmitted to the server, (a) the operation count history of the actuator 4, (b) the operation torque history of the actuator 4, and (c) the operation time of the actuator 4. The history and the drawings of (d) the actuator 4 and the valve body 3 can be displayed respectively, and among these, in (a) to (c), they are displayed by a table or a graph, respectively.

(A) As the history of the number of operations of the actuator 4, the number of times of opening / closing operation of the actuator 4 from the start of use is displayed as a history based on at least "angle data". (B) As the operating torque history of the actuator 4, the torque calculated based on the "angle data" and the "pneumatic data" is displayed as a history according to the number of operations. The target torque is the torque at the start of operation. (C) As the operation time history of the actuator 4, the operation time of the actuator 4 according to the number of operations is displayed as a history based on at least "angle data". (D) The drawings of the actuator 4 and the valve body 3 are displayed based on the model and order number of the actuator 4 and the valve body 3 input to the IC tag 27.

In addition, as other functions, maintenance recommendation information based on the above history is displayed, or when there is a suspicion of erroneous input in the initial setting of the device, or the actuator 4 or valve body 3 equipped with the device imitates. When it is a product, this may be displayed. For example, when the operating time of the actuator 4 is extremely fast or slow with respect to the model and order number (special specifications different for each order) of the actuator 4 and the valve body 3 input to the IC tag 27, or when the actuator 4 is carried. For example, the actuator 4 in the field photographed by the camera of the terminal is small.

On the other hand, (2) as a function of displaying an abnormal breaking news determined by application software based on information received from a device without going through a server, for example, when the operating time is extremely long or air pressure is applied. If the value of the angle sensor does not change despite this, that is, if the actuator 4 is not operating, it is determined to be abnormal and displayed as breaking news. Further, when such an abnormal value is measured, a display indicating that data transmission to the server is urged is also performed.

Next, the servers used in the above-mentioned automatic valve status recording / display confirmation system include (1) the function of accumulating unique information of the actuator 4 and the valve body 3, and (2) the measurement data of the angle and air pressure of the actuator 4. It has a storage function, (3) an operating torque calculation function of the actuator 4, and (4) a transmission / reception function with a mobile terminal.

(1) As a function of accumulating unique information of the actuator 4 and the valve body 3, drawing information and design information of the actuator 3 used for calculating the operating torque are accumulated. (2) As a function of accumulating measurement data of the angle and air pressure of the actuator 4, when receiving from a mobile terminal a plurality of times, these measurement data are accumulated as a series. (3) The operating torque calculation function of the actuator 4 is the cylinder diameter φD of the actuator 4 shown in FIG. 6 and the offset from the central axis of the pinion 74 (or the scotch yoke (not shown)) based on the air pressure data received from the mobile terminal. It is calculated from the quantity L, the conversion efficiency η, and the like. At this time, the operating torque (output torque) T of the actuator 4 = differential pressure ΔP × cylinder diameter φD × offset amount L × conversion efficiency η, and the differential pressure ΔP = air pressure P1-CLOSE on the OPEN side and air pressure P2 on the CLOSE side. (4) As a transmission / reception function with a mobile terminal, a medium-range wireless communication module such as LTE or Wi-Fi is used.

In the above embodiment, an example in which a pneumatic actuator is used as the actuator for automatic operation has been described, but it may be a fluid pressure actuator other than pneumatic or an electric actuator.
The fixed portion 12 of the storage unit 1 can be changed in spacing, width, and length according to the size of the valve body 3 and the actuator 4, while corresponding to the mounting seat 10 of the NAMUR standard. Further, in the above embodiment, the mounting seat 10 of the actuator 4 is provided according to the NAMUR standard, but it may be provided according to a standard other than this, and in this case as well, the shape of the fixing portion 12 is provided on the mounting seat. By forming according to the above, it becomes possible to mount the actuator on the actuator as in the case of the NAMUR standard.

Further, the angle detection element 20 built in the accommodating portion 11 may be other than the Hall IC, and for example, a magnetoresistive element may be used.
The split body 50 may be integrated by means other than snap-fit, and may be integrated by, for example, press-fit or a fastening means such as a screw and fixed to the control shaft 28.

Further, the rotating element 2 is formed in a plate-shaped fan shape so as to cover a part of the upper surface or the lower surface of the accommodating portion 11, and the angle detection element 20 faces the rotating element 2 formed in the plate-shaped fan shape. As such, it may be built in the top surface or the bottom surface of the accommodating portion 11.

As the communication module 25, infrared rays, Wi-Fi Direct, or the like can be used in addition to Bluetooth.
The unique information of the actuator 4 and the valve body 3 may be stored in a wireless IC chip other than the IC tag 27, or in a barcode or a two-dimensional barcode.

Next, the operation of the automatic valve state recording / display confirmation device of the present invention in the above embodiment will be described. Here, the valve main body 3 equipped with the actuator 4 installed at the site will be described on the assumption that it is in the fully closed state.
In FIG. 4, the magnetizing indicator 2 is attached to the control shaft 28. At that time, the control shaft 28 is sandwiched between the magnetizing indicator 2 and the divided body 50 by the support member 65, and these are fixed by snap-fit fitting. At this time, by fitting the square shaft 29 into the square hole 51, the split body 50 can be fixed to the control shaft 28 in a non-rotating state while the magnetizing indicator 2 is positioned. In this case, the magnetizing indicator 2 is arranged so as to be on the mounting side (Hall IC20 side) of the storage unit 1.

When mounting the storage unit 1 on the upper part of the actuator 4, first, among the mounting bolts 46 for fixing the bracket 41 of the switch box 42, which is an accessory arranged on the upper part of the actuator 4, the storage unit 1 is mounted. Loosen the two mounting bolts 46 on the side slightly. In this state, while mounting a male screw portion of the mounting bolt 46 (not shown) inside the long groove 13, a fixing portion is provided between the head portion 46a of the mounting bolt 46 and the bracket 41 from a substantially horizontal direction with respect to the mounting seat 10. The storage unit 1 is mounted along the mounting seat 10 while inserting the 12. As a result, the storage unit 1 is mounted along the pedestal of the switch box 42 facing the mounting seat 10.

When the storage unit 1 is mounted, the hall IC 20 approaches the magnetizing indicator 2, and when the storage unit 1 is brought close to the control shaft 28 to a position where they function as a magnetic encoder, the LED 23 lights up. The magnetizing indicator 2 and the hall IC 20 can be positioned at a predetermined distance while visually recognizing the LED 23. Subsequently, if the storage unit 1 is tightened together with the bracket 41 by the mounting bolts 46 and fixed to the actuator 2, the storage unit 1 is mounted at a predetermined position.

As a result, the magnetizing indicator 2 is attached to the control shaft 28 without removing the existing actuator 4 or the valve body 3 from the piping equipment, removing the actuator 4 from the valve body 3, or removing the switch box 42 from the actuator 4. It can be fixed in an accurately positioned state, and a device having a storage unit 1 and a magnetizing indicator 2 can be easily mounted at a predetermined position on a mounting seat 10 of the NAMUR standard via a fixing portion 12. After mounting these, the rotation angle of the control shaft 28 can be accurately detected.

By arranging the storage unit 1 and the magnetizing indicator 2 between the actuator 4 and the switch box 42, the protrusion to the outside is suppressed and the installation space is prevented from expanding. Therefore, it can be attached to an automatic valve installed in a narrow space. The storage unit 1 can be mounted at a position shifted by 180 ° with respect to the actuator 4, and in this case as well, the two mounting bolts 46 can be loosened and mounted in the same manner as described above. As a result, the storage unit 1 can be provided on any side facing 180 ° depending on the installation status of the valve body 3 and the actuator 4.

Further, not only when the valve body 3 is in the fully closed state, but also when the valve body 3 has an intermediate opening degree and the control shaft 28 is in the middle of rotation, the square shaft with respect to the control shaft 28 By mounting the magnetizing indicator 2 while positioning the 29 and the square hole 51, the storage unit 1 and the magnetizing indicator 2 can be accurately mounted and the initial setting work can be performed even when the automatic valve is in operation. Become.

After mounting the storage unit 1 and the magnetizing indicator 2, the operating status of the valve body 3 at each site can be visually recognized using a mobile terminal. At that time, by using the communication module 25 made of Bluetooth, even if the valve body 3 and the actuator 4 are installed in a complicated pipeline or a narrow place, they can be seen from a close place without being directly visually recognized. You can check it on your mobile device.

When the initial setting work is performed on the mobile terminal immediately after the installation of the device, the device is reset to the initial setting mode state, and the angle data is set to 0 ° according to the fully closed state of the valve body 3. At this time, it is not necessary to adjust the actuator 4 and the valve body 3, and the product information and the order number may be written on the IC tag 27. Next, the application software for the mobile terminal is downloaded from the download URL, and the initial setting data is transmitted to the server. As a result, the installation date of the device is recorded.

After the initial setting work is completed, the initial setting mode is switched to the normal mode. When switching the normal mode, the power supply 26 may be turned off after a certain period of time to shift to the power saving mode.

On the actuator 4 side, a speed controller 72 is provided in the intake / exhaust holes 44, 45, and a pressure sensor 40 is inserted between the intake / exhaust holes 44, 45 and the speed controller 72 via a joint such as a cheese pipe 70 or a nipple pipe 71. Connecting. In this case, by attaching the pressure sensor 40 to the branch portion of the cheese pipe 70, the pressure can be measured by the pressure sensor 40 with a simple structure without adversely affecting the intake and exhaust of the compressed air.

In the device, when the actuator 4 starts to be driven, the air pressure is detected by the pressure sensor 40, and the CPU 21 is released from the power saving state by this detection. Specifically, when the air pressure sensor 40 is used, when the air pressure P1 on the OPEN side supplied to the cylinder 43 of the actuator 2 rises to be equal to or higher than the air pressure P2 on the CLOSE side, that is, the air pressure P1 ≧ air pressure P2. Occasionally, it is determined that the driving of the actuator 4 has started, the mode shifts from the power saving mode to the normal mode, and the measurement data is started to be stored in the memory 22. When the actuator 4 is driven, for example, the air pressure P1 rises from 0 to 0.4 MPa, and the air pressure P2 falls from 0.4 MPa to 0.

When the valve body 3 is driven by the actuator 4, the butterfly valve (or ball valve) has the highest operating torque in the fully open position and the fully closed position. Further, among the pneumatic actuators, the Scotch yoke type actuator also has a so-called substantially U-shaped torque characteristic having the highest output torque characteristic at the start and at the end of the stroke. For these reasons, when measuring data, the torque at which the operation is started from the fully open and fully closed positions, that is, the "operation start torque" is important.

Therefore, since the rotation of the control shaft 28 moves relatively slowly immediately after the start of operation of the actuator 4, the magnetizing width H is set narrow in the magnetizing region α of 15 ° before and after the fully open and fully closed positions. This improves the accuracy of angle detection.

When the above-mentioned air pressure sensor 40 is used, the rotation direction of the actuator 4 can be detected by the magnitude relation of the air pressures P1 and P2. For example, when the relationship shifts from air pressure P1> air pressure P2 to air pressure P1 <air pressure P2, it can be detected that the rotation direction is from "open" to "closed".
Further, as a means for detecting the rotation direction with the angle sensor without using the air pressure sensor 40, two angle detection elements 20 are arranged so as to be displaced vertically and horizontally, and the ON / OFF signal in each element 20 is temporally arranged. The rotation direction and the angle may be detected by utilizing the difference.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the description of the embodiments, and is within the scope of the invention described in the claims of the present invention. Therefore, various changes can be made.

1 Storage unit 2 Magnetization indicator (rotating element)
3 Valve body 4 Actuator 10 Accessories Mounting seat 11 Accommodating part 12 Fixed part 20 Hall IC (angle detection element)
21 CPU
22 Memory 25 Communication module 26 Power supply 28 Control shaft 29 Square shaft 40 Pressure sensor 50 Split body 60 Magnetized part 61 Transmission mechanism H Magnetized width

Claims (4)

The state recording device for an automatic valve includes an accessory mounting seat formed on the upper part of an actuator for automatic operation mounted on a valve body composed of a rotary valve, a storage unit provided to be mounted on the mounting seat, and this storage. An angle detection element provided in the unit and a rotation element mounted on the control shaft of the actuator are provided, and when the storage unit is mounted on the mounting seat, the rotation angle of the rotation element is provided by the angle detection element. Is provided so as to be detectable, and the angle detection element is connected to a memory via a CPU, which is normally in a power saving state, and the power saving state is released when the operation of the actuator is detected. A state recording device for an automatic valve, characterized in that at least the angle data detected by the angle detecting element is stored in the memory. The air pressure sucked and exhausted by the actuator is provided so as to be measurable by the pressure sensor, and when the actuator starts driving, the air pressure is detected by the pressure sensor, and the CPU is released from the power saving state by this detection. The automatic valve state recording device according to claim 1. The automatic valve according to claim 2, wherein the rotation direction of the actuator is detected by using the pressure sensor based on the magnitude relationship between the air pressure on the OPEN side and the air pressure on the CLOSE side supplied to the cylinder of the actuator. State recorder. The automatic valve state recording device according to claim 2 or 3, wherein the storage unit has a storage unit, and a communication module capable of communicating with the storage unit is mounted on the pressure sensor.

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