JPH09242927A - Data record storage device for valve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a necessity of wiring into a data processing room and record and store data concerning a valve device and its drive device during operation. SOLUTION: A data record and storage device 30 is integrally mounted on an electric motor 13b of a drive device 13 through a signal line 13c. A memory card 17 which can be detached, an amplifier 16, an alarm mechanism, and a data distinguishing mechanism are provided in the data record and storage device 30. The data obtained from a sensor 20 on a valve side and a sensor 21 in an electrical drive part is recorded and stored in a memory card of the data record and storage device as raw data. The raw data is recovered by changing the memory card at the time of periodic inspection of a valve device for analysis and processing. Moreover, the raw data is distinguished by the distinguishing mechanism and informs by the alarm mechanism when abnormal operation of a valve element 3 and leakage of a valve seat 1a and gland packing 12 occur.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve device suitable for use in a plant such as a nuclear power plant that handles high temperature and high pressure steam, and a drive device for the valve device.
The present invention relates to a device for recording and storing various information such as deterioration and abnormality of a valve device and a drive device.

[0002]

2. Description of the Related Art Conventionally, investigations for abnormalities in a valve device and its drive device, which have been used in a plant such as a nuclear power plant by electric operation, have been conducted when the plant was stopped. In other words, the valve has been operated under no load with no fluid flow, and various information obtained at that time has been used to investigate and analyze whether there is an abnormality.

[0003]

However, when the valve device is actually used, a dynamic load is applied to the drive part of the valve device. Therefore, the result obtained by the above-mentioned investigation shows that the valve device is in the unloaded state. It was limited to the typical ones. That is, the data obtained in the above-mentioned investigation is only a value when the device is operating independently, and is different from the actual usage state, so there is a problem in its effectiveness. In addition, when an attempt is made to conduct a survey while the plant is operating in order to obtain data on the valve device in operation, the signal of the electric valve drive device or the sensor provided around the valve element is led to a predetermined central processing chamber. A large number of line treatments were required. In particular, when investigating the valve device in the nuclear reactor of the nuclear power plant during the above operation, it is necessary to penetrate the reactor partition wall by the number of target valve devices and perform line treatment. Because it was not practical. It is therefore an object of the present invention to provide a device for recording and storing data relating to a valve device and its drive during operation without the need for wiring to the data processing chamber.

[0004]

In order to achieve the above object, a data recording / storing device for a valve device of the present invention includes a first sensor for detecting information about the valve device and a valve element of the valve device. A second sensor for detecting information about a driving device operated between the position and the fully open position, and predetermined information of the valve device and the driving device during operation, which is obtained from the first and second sensors. It is equipped with a removable memory device that can record and store over a period of time. Further, the information about the valve device and the drive device is raw data recorded and stored in the memory device in correspondence with the operating time each time the valve device or the drive device is operated, and the raw data and the normal data are stored. It may further include a discriminating mechanism for discriminating the normality of the valve device by comparison with time reference data, and an alarm mechanism for notifying whether the valve device is normal or abnormal based on the discrimination result of the discriminating mechanism. Furthermore, it is connected to a predetermined external information processing device via an online communication cable,
The information may be analyzed without detaching the memory device. According to a fourth aspect of the present invention, the valve device data recording / storing device according to any one of the first to third aspects is integrally attached to an outer case.

In the present invention having the above-mentioned structure, the raw data detected each time the valve device or the like is operated by the first sensor for detecting information about the valve device and the second sensor for detecting information about the drive device are , According to the time,
The data is stored in a removable memory device in the valve data storage device and stored for a predetermined period. The memory device in which the raw data is stored is replaced with a new memory device at every periodic inspection of the valve device. Since the raw data is the data as detected by the first and second sensors, the processing device that can be used for data analysis is hardly limited, and is analyzed by any processing device selected by the analyst. . Further, the raw data is compared with the reference data at the normal time by the discriminating mechanism provided in the valve device data recording / storing device, and the alarm mechanism informs whether the valve device is operating normally or abnormally. To be done.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention, that is, embodiments will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts. FIG. 1 shows a data recording / storing device 30 for a valve device according to the present invention.
A valve device (gate valve) to which (hereinafter, simply referred to as a data recording / storing device) is attached is shown. The valve box 1 is
A fluid inlet passage 1b and a fluid outlet passage 1c are provided.
These passages 1b and 1c have a substantially annular valve seat 1a at their ends adjacent to each other. The valve lid 2 is provided with a valve body 1 at the flange portion 2b by an appropriate fastening means such as a bolt 2a.
Is attached to the top of. The valve element 3 is selectively interposed between the valve seats 1a formed in the valve box 1 and is connected to the fluid inlet passage 1b.
Also, the fluid outlet passage 1c is brought into a communication state or a non-communication state. At the top of this known valve body 3 with a valve seat 3a,
The lower end of the stem 4 is integrally connected by a known means such as screwing. The valve stem 4 extends upward through a well-known gland packing 12 and extends into a drive device 13 attached to the top of the valve lid 2 by a bolt and nut assembly 2d. The valve stem 4 is driven by the manual handle 13a or the electric motor 13b and moves in the vertical direction. The gland packing 12 is a packing restraint 1
It is arranged in the cylindrical portion 2c of the valve lid 2 by 2a.

In the valve stem 4 of the valve device, as shown in FIG.
A temperature sensor, a strain sensor (strain gauge), and a vibration sensor are attached as indicated by reference numeral 20 and conceptually indicated by a dotted line. The various sensors described above may be known ones, and in the present embodiment, the specification of Japanese Patent Application No. 6-219098 and the application of Japanese Patent Application No. 6-21909 are filed by the present applicant.
Since almost the same sensor as the sensor disclosed in the specification No. 9 is used, detailed description of the sensor itself and its mounting position will be omitted. Each of the above-mentioned sensors is connected to the data recording / storing device 30 through signal lines (connector cables) 14a, 14b, 14c from the connection terminal 14 provided on the head portion of the valve stem. These temperature sensor, strain sensor, and vibration sensor detect information around the valve body 3 or the valve stem 4, and are therefore collectively referred to as "valve side sensor". What is detected by the valve side sensor 20 is a load (including a load and a stem thrust) applied to the valve body 3, vibration of the valve body 3, a movement amount, a temperature, and the like. In the present embodiment, an “electric drive sensor” (not shown) is further attached to the electric motor 13b of the drive device 13 as indicated by the reference numeral 21 and conceptually indicated by a dotted line. What is detected by the electric drive sensor 21 is a motor current / voltage of the electric motor 13b and an ON-OFF contact operation signal (valve opening / closing contact signal) of a limit switch (not shown) that indicates the operation opening / closing of the drive device 13. ) And an ON-OFF contact operation signal (torque contact signal) of a torque switch (not shown) relating to the output torque of the drive device 13.

The data recording / storing device 30 of the present invention can utilize existing sensors by being attached to the valve device which already has the above-mentioned sensor for data detection. The data detected by the valve side sensor 20 and the electric drive unit sensor 21 are directly input to the memory card 17 in the data recording / storing device 30 via the signal line (connector cable) 13c. The connection between the valve side sensor 20 and the electric drive unit sensor 21 and the data recording / storing device 30 will be described.
As shown in FIG. 2, the existing terminal box cover 13d of the drive unit 13 may be modified or replaced so as to be integrally attached to the terminal box cover, or as shown in FIG. The data recording / storing device 30 may be incorporated in the driving device 13 in advance when the 13 is newly manufactured. In any case, the data recording / storing device 30 is provided integrally with the valve device by only changing a part of the existing valve device.

The data recording / storing device 30 has a memory card 17, an alarm mechanism, a data discriminating mechanism (not shown), and an amplifier 16. The amplifier may not be built in the data recording / storing device 30, but an external amplifier may be connected, or an appropriate amplifier may be combined and connected as needed. On the outer surface of the data record storage device 30,
The memory card outlet 32 and the lamp 34 which is the above-mentioned alarm mechanism are provided. The data discriminating mechanism compares the raw data detected by the valve side sensor 20 and the electric drive unit sensor 21 with the pre-recorded data on the normal operation of the valve device to check the normality of the valve device. Can be determined. Lamp 34 above
Is used as an alarm lamp to notify normality or abnormality. In this embodiment, the memory card 17 is
A memory card with an integrated IC is used.
It may be replaced with a dedicated IC memory card base. Since the memory card 17 can store the data of the plant operation period for one year, the memory card 17 in which the data is recorded and stored is replaced with a new memory card every year.

Valve side sensor 20 and electric drive unit sensor 21
Since the data obtained from the above is recorded and stored as raw data in the data recording and storage device 30, it is reproduced as a signal as it is in the state obtained by the above sensor in the analysis. Therefore, the data processing device or data processing software that can be used for data processing is not limited to a specific format, and the data processing device or data processing software that has already been developed or is in use, or the newly installed processing device. (Processing software) can be used for processing. Furthermore, since the memory card containing the raw data can be carried around, it can be processed by an external data processing device at any place. The data recording / storing device 30 is connected to a display device 19 such as a CRT, and is connected to the valve side sensor 20 and the electric drive unit sensor 2.
The data from 1 can be displayed at any time.

Next, the operation of the valve device having the data recording / storing device 30 will be described. The valve-side sensor 20 detects the load load, temperature, vibration, and movement amount of the valve body 3 whenever the valve operates, and the electric drive sensor 21 also detects the electric motor whenever the valve operates. The motor current / voltage of 13b, the valve opening / closing contact signal, and the torque contact signal are detected. The load, temperature, vibration, valve body movement amount, motor current / voltage, valve opening / closing contact signal, and torque contact signal described above are input and stored in the memory card 17 in association with the drive operation time of the drive device 13. It This will be explained based on some specific examples below.

When the valve device is closed with a fluid such as high-temperature high-pressure steam flowing through the fluid inlet passage 1b and the fluid outlet passage 1c, part of the valve stem 3 and the valve stem 4 are exposed to the fluid. Therefore, the valve stem 4 expands in the direction in which the valve body 3 is pushed into the valve closing position. After that, when the valve device is cooled by shutting off the high-temperature and high-pressure fluid, the valve box 1 contracts in the direction in which the valve seats 1a approach each other, so that normally, the valve body is caught and the valve opening is difficult. become. In order to avoid this, the drive device 13 prevents the valve body 3 from being pushed to the closed position by the expansion of the valve stem 4 described above, based on the rise in the stem temperature detected by the temperature sensor. Pull up. At that time, the load load when pulling up the valve stem 4 is detected by the strain sensor,
The temperature of is detected by the temperature sensor and recorded and stored in the data recording and storage device 30.

After closing the valve, the bottom of the valve body 3 and the valve box 1 are closed.
If the drain is accumulated in the space 1d defined between the bottom of the space 1d and the bottom of the space, the temperature of the valve box rises during warming up accompanying restarting, and the drain in the space 1d is heated and vaporized. Since there is no escape area for the steam, the steam may be urged in the direction in which the valve body 3 is further closed, that is, in the direction in which it is pressed against the valve seat of the valve box. When the valve is opened in such a state, the valve stem 4 is pulled up by the drive device 13, but at that time, a larger load is applied to the valve stem 4 than in the normal state.
The temperature rise and the load applied to the valve stem 4 at that time are detected by the temperature sensor and the strain sensor, and are recorded and stored in the data recording and storage device 30.

Further, when the valve seat leaks when the valve body is fully closed, the leak flow causes the valve body 3 to vibrate, and the valve stem 4 and the like integrated with the valve body 3 also vibrate. Such vibration is detected by the vibration sensor, and the drive device 13 drives the valve body 3 and the valve stem 4 in the direction to be further closed until the vibration due to the leakage disappears. As a result, a load is applied to the valve stem 4, which is detected by the strain sensor. At this time, not only the vibration and the load are recorded, but also the load applied to the valve stem 4 and the maximum allowable load stored in advance in the data recording / storing device 30 are determined by the determination mechanism of the data recording / storing device 30. When the leakage does not stop, that is, when the vibration sensor still detects vibration, the memory card 17 and the abnormality information are also included.
Stored in

On the other hand, regarding the leakage of the gland packing 12 in the valve open state, the change width of the temperature of the valve stem 4 detected by the temperature sensor is detected by the data recording / storing device 30 by the discriminating mechanism of the data recording / storing device 30. It is determined whether or not the stored reference range is exceeded, and if it exceeds, it is determined that a leakage state has occurred. And
When it is in the leaked state, in order to stop it, the drive device 13 further moves the valve body 3 in the fully open position upward until the variation width of the temperature of the valve stem 4 falls within the reference range. In this way, the leakage of the gland packing 12 is suppressed by feeding back the temperature detection result as a change in the axial position of the stem, but when the leakage still does not stop, an abnormality of the gland packing part is notified. The information is stored in the memory card 17 and is used to care for the gland packing at the time of periodic inspection when the plant is stopped, as in the case of the above-mentioned valve seat leakage.

Further, the load applied to the valve body 3, vibration,
Since not only the above information such as the temperature, the motor current / voltage of the electric motor 13b, the valve opening / closing contact signal and the torque contact signal, but also the information about the movement amount of the valve body 3 is a judgment material for the normality / abnormality of the valve device. In this embodiment, it is recorded in the memory card 17.

At the time of periodical inspection of the valve device, the memory card 17 containing the data is taken out from the data recording / storing device 30 and a new memory card is inserted in its place to record and store the data until the next periodical inspection. for that reason,
With regard to the valve device of a nuclear power plant, since it is not necessary to measure the data on site, the possibility of the worker being exposed to radiation is greatly reduced. Further, since all the data in the memory card 17 is the data during the actual operation of the valve device, it is used as effective data for improving the reliability of the valve and enhancing the performance thereof.

In the above embodiment, the raw data is analyzed from the memory card 17 taken out from the data recording / storing device 30, but the present invention is not limited to this. As shown in FIG. 30 is connected to an online personal computer 50 via an online communication cable 52, and the memory card 17 is connected to the data recording / storing device 3
It is also possible to process the data without retrieving it from 0, and it can be selected as required.

The arrangement of the data recording / storing device 30 described in the above embodiment is not limited to the mode shown in FIG. That is, FIG. 4 shows a modified embodiment relating to the arrangement of the data recording / storing device 30. The data recording / storing device 30 is arranged away from the valve device, and the connector cable 4
You may connect to the valve side sensor 20 and the electric drive part sensor 21 via 0. Also in this modified embodiment, the data recording / storing device 30 can be mounted by only changing a part of the existing valve device without performing the line treatment penetrating the wall of the plant.

[0020]

As described above, according to the data recording / storing device for a valve device of the present invention as set forth in claim 1, the first sensor for detecting information about the valve device and the valve body of the valve device are provided. Selectively connected to a second sensor for detecting information about the drive operating between the fully closed position and the fully open position,
Since a removable memory device capable of recording and storing the information of the valve device and the drive device during operation obtained from the first and second sensors for a predetermined period is provided, the valve during actual operation is provided. It is possible to obtain various kinds of information regarding devices and the like, and the effectiveness of data is improved. Further, regarding the valve device used in the nuclear power plant, the data can be collected by replacing the memory card (memory device) when the plant is stopped for periodic inspection or the like, so that the worker can be prevented from being exposed to radiation. According to the data recording / storing device for a valve device of claim 2, the information is raw data recorded and stored in the memory device in association with an operating time each time the valve device or the driving device is operated. Then, a discrimination mechanism for discriminating the normality of the valve device by comparing the raw data with the reference data at the time of normality, and an alarm mechanism for notifying normality or abnormality based on the discrimination result of the discrimination mechanism are further provided. Because I'm prepared
The data processing device or data processing software that can be used for data processing is not limited to a specific format, and may be a data processing device or data processing software already developed or in use, or a newly installed processing device. It becomes possible to process. Further, it is possible to easily know whether the valve device is normal or abnormal. According to the data recording and storage device for a valve device of claim 3, since it is connected to a predetermined external information processing device via an online communication cable, the information is analyzed without detaching the memory device. It is possible to constantly monitor the presence or absence of an abnormality even during operation of the valve device. According to the drive device of claim 4, since the data recording and storage device for valve device according to any one of claims 1 to 3 is integrally attached to the outer case, any one of claims 1 to 3 In addition to having the above-described effects achieved by the invention described above, it is possible to obtain various information of the valve device in operation without renewing costly and time-consuming wiring processing.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a data recording / storing device of the present invention.

FIG. 2 is a partially enlarged view of the periphery of a driving device to which the data recording / storing device of this embodiment is attached.

FIG. 3 is a partially enlarged view of the periphery of the driving device when the data recording / storing device is provided in the driving device in advance.

FIG. 4 is a general view of a modified embodiment in which the data record storage device is connected to the valve device by a connector cable.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Valve box, 1a ... Valve seat, 1b ... Fluid inlet passage, 1c ... Fluid outlet passage, 3 ... Valve body, 4 ... Valve stem, 13 ... Drive device, 13b ... Electric motor, 13d ... Terminal box cover (outer case) ), 17 ... Memory card (memory device), 20 ... Valve side sensor (first sensor), 21 ... Electric drive unit sensor (second sensor), 30 ... Data recording / storing device, 34 ... Lamp (alarm mechanism), 50 ... Online PC (external information processing device), 52 ... Online communication cable.

Claims (4)

[Claims] 1. A first sensor for detecting information about a valve device and a second sensor for detecting information about a drive device that operates a valve body of the valve device between a fully closed position and a fully open position. Valve device data, which is connected and has a removable memory device capable of recording and storing the information of the valve device and the drive device during operation obtained from the first and second sensors, for a predetermined period. Record storage device. 2. The information relating to the valve device and the drive device is raw data recorded and stored in the memory device in association with an operating time each time the valve device or the drive device is activated. And a discriminating mechanism for discriminating the normality of the valve device by comparison with reference data at the normal time,
The data recording and saving device for a valve device according to claim 1, further comprising: an alarm mechanism for notifying normality or abnormality based on a determination result of the determination mechanism. 3. The valve device data record storage device according to claim 1, wherein the data storage device is connected to a predetermined external information processing device via an online communication cable, and the information is analyzed without detaching the memory device. . 4. A valve device driving device, wherein the valve device data recording and storage device according to claim 1 is integrally attached to an outer case.