JP3002640B2 - Data recording and storage device for valve device - Google Patents

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 which handles high-temperature and high-pressure steam, and a driving 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, an investigation of the presence or absence of an abnormality in a valve device and its driving device by electric operation, which has been used in a plant such as a nuclear power plant, has been performed when the plant is stopped. That is, the valve is operated in a no-load state where there is no fluid flow, and investigation and analysis as to whether there is an abnormality has been performed based on various information obtained at that time.

[0003]

However, when the valve device is actually used, a dynamic load is applied to the drive unit of the valve device. Therefore, the result obtained in the above-described investigation shows that the static load is in the unloaded state. Was limited to the typical ones. That is, the data obtained in the above-described investigation is only a value at the time of operation of a single device, and is different from an actual use state. In addition, when an investigation is to be performed during plant operation in order to obtain data of a valve device during operation, a signal of an electric valve drive device or a sensor provided around a valve body is guided to a predetermined central processing room. A large number of line treatments were required. In particular, in the case of conducting the above-described investigation during operation of a valve device in a nuclear power plant reactor, it is necessary to perform wire treatment by penetrating the reactor bulkhead by the number of target valve devices. Therefore, it was not practical. Accordingly, it is an object of the present invention to provide an apparatus for recording and storing data on a valve device and its driving device during operation without requiring wiring to a data processing room.

[0004]

In order to achieve the above-mentioned object, a data recording and storage device for a valve device according to the present invention operates a valve device and a valve body of the valve device between a fully closed position and a fully open position. The valve is installed in a room accommodating a driving device,
A first sensor for detecting information about Kuhaben stem, said selectively connected to the second sensor for detecting information about driving apparatus, the first, or the valve body during operation obtained from the second sensor A removable memory device capable of recording and storing information on the valve stem and the driving device for a predetermined period of time , wherein the information on the valve element or the valve stem and the driving device is stored in the valve device or the driving device. A determination mechanism for determining the normality of the valve device by comparing raw data recorded and stored in the memory device in association with an operation time each time the device is operated, and comparing the raw data with reference data in a normal state; The apparatus may further include an alarm mechanism for notifying whether it is normal or abnormal based on the result of the determination by the determination mechanism. Further, the information processing apparatus may be connected to a predetermined external information processing apparatus via an online communication cable, and may analyze the information without detaching the memory device. Further, the driving device according to claim 3 is the driving device according to claim 1 or 2.
The data recording and storage device for a valve device according to any one of 2 ) is integrally attached to an outer case.

In the present invention having the above-described structure, raw data detected by the first sensor for detecting information on the valve device and the second sensor for detecting information on the driving device each time the valve device or the like is operated is , Corresponding to time,
The data is recorded in a removable memory device in the valve device data recording and storage device, and is stored for a predetermined period. The memory device storing the raw data is replaced with a new memory device every time the valve device is periodically inspected. Since the raw data is data as detected from the first and second sensors, the processing devices that can be used for data analysis are hardly limited, and are analyzed by any processing device selected by the analyst. . Further, the raw data is compared with the reference data at normal time by a discriminating mechanism provided in the valve device data recording and storage device, and it is notified by a warning mechanism whether the operation of the valve device is normal or abnormal. Is done.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention 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 and storage device 30 for a valve device according to the present invention.
1 shows a valve device (gate valve) to which a data recording / storing device is attached. Valve box 1
A fluid inlet passage 1b and a fluid outlet passage 1c are provided.
These passages 1b, 1c have substantially annular valve seats 1a at their adjacent ends. The valve cover 2 is attached to the valve box 1 by an appropriate fastening means such as a bolt 2a at the flange portion 2b.
To the top. The valve element 3 is selectively interposed between the valve seats 1a formed in the valve box 1, and is provided with a fluid inlet passage 1b.
And the fluid outlet passage 1c is in a communicating state or a non-communicating state. On top of this known valve body 3 having a valve seat 3a,
The lower end of the stem 4 is integrally connected by well-known means such as screwing. The valve stem 4 extends upwardly through a known gland packing 12 and extends into a drive 13 mounted on the top of the valve lid 2 by a bolt and nut assembly 2d. The valve stem 4 is driven by a manual handle 13a or an electric motor 13b and moves in a vertical direction. The gland packing 12 is a packing holder 1
2a, it is disposed in the cylindrical portion 2c of the valve cover 2.

In FIG. 1, a valve stem 4 of the valve device is provided.
A temperature sensor, a strain sensor (strain gauge) and a vibration sensor are attached as indicated by the reference numeral 20 and conceptually indicated by a dotted line. The various sensors described above may be known sensors, and in the present embodiment, the specification of Japanese Patent Application No. 6-219098 and the specification of Japanese Patent Application No. 6-21909 filed by the present applicant.
Since the same sensor as that disclosed in the specification of Japanese Patent No. 9 is used, the description of the sensor itself and the detailed description of its mounting position are omitted. Each of the above-described sensors is connected to a data recording and storage device 30 from a connection terminal 14 provided on the valve stem head by signal lines (connector cables) 14a, 14b, and 14c. These temperature sensor, strain sensor, and vibration sensor are collectively referred to as “valve-side sensors” because they detect information around the valve element 3 or the valve stem 4. What is detected by the valve-side sensor 20 includes a load applied to the valve body 3 (including a load applied and a stem thrust), vibration of the valve body 3, an amount of movement, a temperature, and the like. In the present embodiment, an “electric drive unit sensor” (not shown) is further attached to the electric motor 13 b of the drive device 13 as conceptually indicated by a dotted line with reference numeral 21. The electric drive unit sensor 21 detects the motor current / voltage of the electric motor 13b, an ON / OFF contact operation signal (a valve opening / closing contact signal) of a limit switch (not shown) indicating the opening / closing of the driving device 13, and the like. ) And an ON-OFF contact operation signal (torque contact signal) of a torque switch (not shown) relating to the output torque of the driving device 13.

The data recording and storage device 30 of the present invention can utilize existing sensors by being attached to a valve device having the above-described sensor for detecting data. Data detected by the valve side sensor 20 and the electric drive unit sensor 21 is directly input to the memory card 17 in the data recording and storage 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 and storage device 30 will be described.
As shown in FIG. 2, the existing terminal box cover 13d of the driving device 13 may be modified or replaced to be integrally attached to the terminal box cover, or as shown in FIG. The data recording and storage device 30 may be incorporated in the drive device 13 in advance when the device 13 is newly manufactured. In any case, only by changing a part of the existing valve device, the data recording and storage device 30 is provided integrally with the 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. Note that the amplifier may not be built in the data recording and storage device 30, but may be connected to an external amplifier, or may be connected to an appropriate amplifier as needed. On the outer surface of the data record storage device 30,
A memory card outlet 32 and a lamp 34 serving as an alarm mechanism described above are provided. The data discrimination mechanism compares the raw data detected from the valve-side sensor 20 and the electric drive unit sensor 21 with data recorded in advance for normal operation of the valve device, thereby checking the normality of the valve device. Can be determined. Lamp 34 above
Is used as an alarm lamp for indicating normal or abnormal. In the present embodiment, the memory card 17
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
Is recorded and stored in the data recording and storage device 30 as raw data, so that it is reproduced as a signal as it is obtained by the above-described sensor upon analysis. Therefore, the data processing device or data processing software that can be used for data processing is not limited to a specific format, but is a data processing device or data processing software that has already been developed or in use, or a newly introduced processing device. (Processing software). Further, since the memory card containing the raw data can be carried, it can be processed by an external data processing device at an arbitrary location. The data recording and storage device 30 is connected to a display device 19 such as a CRT, for example, and includes a valve-side sensor 20 and an 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 and storage device 30 will be described. The valve-side sensor 20 detects the load, temperature, vibration, and movement of the valve body 3 whenever the valve operates, and the electric drive unit sensor 21 also detects the electric motor whenever the valve operates. 13b, a motor current / voltage, a valve opening / closing contact signal and a torque contact signal are detected. The load, temperature, vibration, amount of movement of the valve body, motor current / voltage, valve opening / closing contact signal and torque contact signal are input and stored in the memory card 17 in relation to the driving operation time of the driving device 13. You. This will be described based on some specific examples below.

When the valve device is closed with a fluid such as high-temperature and high-pressure steam flowing through the fluid inlet passage 1b and the fluid outlet passage 1c, a part of the valve stem 4 together with the valve body 3 is exposed to the fluid. Therefore, the valve stem 4 expands in a direction to push the valve body 3 to the valve closing position. Thereafter, when the valve device is cooled by shutting off the high-temperature and high-pressure fluid, the valve box 1 contracts in a direction in which the valve seats 1a approach each other. become. In order to avoid this, the drive device 13 operates based on the rise of the stem temperature detected by the temperature sensor so that the valve body 3 is not pushed into the valve closing position by the expansion of the valve stem 4 described above. Pull up. At this time, the load applied when the valve stem 4 is lifted is detected by a strain sensor, and the valve stem 4
Are detected by the temperature sensor and recorded and stored in the data recording and storage device 30, respectively.

After the valve is closed, the bottom of the valve body 3 and the valve box 1 are closed.
If the drain accumulates in the space 1d defined between the bottom of the valve and the valve case, the temperature of the valve box rises at the time of warm-up due to restart, and the drain in the space 1d is heated and vaporized. Since the steam has no escape place, the steam may be urged in a direction to further close the valve body 3, that is, a direction to press the valve body 3 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 driving device 13, and at this 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, if the valve seat leaks when the valve body is fully closed, the leakage flow causes the valve body 3 to vibrate, and the valve stem 4 integral with the valve body 3 to vibrate. Such vibration is detected by the vibration sensor, and the driving device 13 drives the valve body 3 and the valve stem 4 further in the closing direction until vibration due to leakage is eliminated. 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 by the discriminating mechanism of the data recording and storage device 30 and the maximum allowable load stored in the data recording and storage device 30 in advance. When the leakage does not stop despite the fact that the values are almost the same, that is, when the vibration sensor still detects vibration, the information of such an abnormality is also stored in the memory card 17 together.
Stored in

On the other hand, regarding the leakage of the gland packing 12 while the valve is open, the change range of the temperature of the valve stem 4 detected by the temperature sensor by the discriminating mechanism of the data recording and storage device 30 is transmitted to the data recording and storage device 30. It is determined whether or not the stored reference range is exceeded, and if so, it is determined that a leak condition has occurred. And
In the case of a leak state, the driving device 13 further moves the valve body 3 in the fully open position until the change width of the temperature of the valve stem 4 falls within the reference range in order to stop the leak state. In this manner, 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 if the leakage still does not stop, the abnormality of the gland packing is notified. The information is stored in the memory card 17 and is used to clean the gland packing at the time of a periodic inspection when the plant is stopped, as in the case of the valve seat leakage described above.

The load applied to the valve body 3, vibration,
Not only the above-mentioned 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 amount of movement of the valve body 3 can be used as a material for determining whether the valve device is normal or abnormal. In this embodiment, the data is recorded on the memory card 17.

At the time of the periodic 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 instead, and the data until the next periodic inspection is recorded and stored. for that reason,
In the case of a valve device of a nuclear power plant, it is not necessary to perform data measurement on site, so that the possibility of exposure to workers is greatly reduced. Further, since the data in the memory card 17 is all data during the actual operation of the valve device, it is used as an effective data for improving the reliability and performance of the valve.

In the above embodiment, the raw data is analyzed from the memory card 17 taken out from the data recording and storage device 30. However, 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
It is also possible to process the data without extracting it from 0, and it can be selected as needed.

Further, the arrangement of the data recording and storage 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 and storage device 30. The data recording and storage device 30 is disposed apart from the valve device, and the connector cable 4 is provided.
0 may be connected to the valve side sensor 20 and the electric drive unit sensor 21. Also in this modified embodiment, the data recording and storage device 30 can be mounted only by changing a part of the existing valve device without performing the line processing that penetrates the wall of the plant.

[0020]

As described above, according to the first aspect of the present invention, the valve device and the valve element of the valve device are moved between the fully closed position and the fully open position. is installed in a room that houses a driving device for operating the valve body young
Or a first sensor for detecting information about the valve stem ;
Said selectively connected to the second sensor for detecting information about driving apparatus, the first, over the information of the valve element or the valve stem and the drive device in operation obtained from the second sensor during a predetermined period Since a detachable memory device capable of recording and storing is provided, various information on the valve device and the like during actual operation can be obtained, and the validity of the data is improved. In addition, regarding a valve device used in a nuclear power plant, data can be collected by exchanging a memory card (memory device) at the time of a plant stop such as a periodic inspection, so that exposure of workers can be prevented. The information is raw data recorded and stored in the memory device in association with an operation time each time the valve device or the drive device is operated, and the raw data and the normal data are stored. Since the apparatus further includes a discriminating mechanism for discriminating the normality of the valve device by comparison with reference data, and an alarming mechanism for notifying whether the valve device is normal or abnormal based on the discrimination result of the discriminating mechanism, data processing that can be used for data processing The devices and data processing software are not limited to those of a specific format, and processing can be performed by a data processing device or data processing software that has already been developed or in use, a newly introduced processing device, or the like. Further, the normality / abnormality of the valve device can be easily known. According to the data recording and storage device for a valve device according to claim 2, the information is analyzed without disconnecting the memory device by being connected to a predetermined external information processing device via an online communication cable. During the operation of the valve device, the presence or absence of an abnormality can be constantly monitored. Claim
According to the drive device described in the third aspect, the data recording and storage device for a valve device according to the first or second aspect is integrally attached to the outer case, so that the invention according to the first or second aspect is achieved. In addition to having the above-described effects, it is possible to obtain various kinds of information on the valve device during operation without renewing costly and complicated wiring processing.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a data recording and storage device of the present invention.

FIG. 2 is a partially enlarged view around a driving device to which the data recording and storage device of the present embodiment is attached.

FIG. 3 is a partially enlarged view around a driving device when a data recording and storage device is provided in the driving device in advance.

FIG. 4 is an overall view of a modified embodiment in which a data recording and storage device is connected to a 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 and storage device, 34: lamp (alarm mechanism), 50 ... On-line personal computer (external information processing device), 52 ... On-line communication cable.

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16K 37/00

Claims (3)

(57) [Claims] 1. A first device installed in a room containing a valve device and a driving device for operating a valve element of the valve device between a fully closed position and a fully open position, and detecting information on the valve element or the valve stem . A sensor and a second sensor for detecting information about the driving device, wherein the first and second sensors are selectively connected to each other.
The valve body or Bence during operation obtained from the sensor
A removable memory device capable of recording and saving information on the system and the driving device for a predetermined period, and information on the valve element or the valve stem and the driving device.
The information is generated each time the valve device or the drive device operates.
The raw data recorded and stored in the memory device in association with the operating time
Data, and the raw data is compared with the reference data in a normal state.
A discriminating mechanism for discriminating the normality of the valve device;
An alarm mechanism to notify normal or abnormal based on another result
Data recording and storage device for the valve device provided for them. 2. An on-line communication with a predetermined external information processing apparatus.
Connected via a communication cable and detached from the memory device
The data recording and storage device for a valve device according to claim 1 , wherein the information is analyzed without causing the data to be analyzed . 3. Data for a valve device according to claim 1 or 2.
The record storage device is integrally attached to the outer case.
The drive of the valve device.