JP2703303B2 - Internal pump handling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to an internal pump handling device in a boiling water nuclear power plant having an internal pump.

(Prior Art) An internal pump is mounted on the bottom of a reactor pressure vessel of a boiling water reactor as shown in FIG. That is, in the figure, reference numeral 1 denotes a pump section, and a diffuser 2
And the impeller 3. The diffuser 2 is fixed to a tip of a stub tube 7 projecting from the bottom of the reactor pressure vessel 6 by a stretch tube 4 and a stretch tube nut 5. Reference numeral 8 denotes a motor case, which is welded to the reactor pressure vessel 6 and is provided so as to protrude from the bottom surface. A water immersion type motor 9 is accommodated in the motor case 8. A motor cover 10 is attached to a lower end of the motor 9, and the motor cover 10 is attached to a lower surface of the motor case 8, and maintains a liquid tightness fixed by a nut 12 screwed on a stud bolt 11. And the motor 9 with the motor case 8
Fixed to The motor 9 drives the impeller 3 connected to the shafts 13 and 14.

The internal pump configured as described above is removed and remounted for periodic inspection.

The internal pump is removed according to the procedure shown in FIG. First, the motor cover 10 is detached downward from the motor case 8, and then the motor 9, the secondary seal 15, and the stretch tube nut 5 are detached downward from inside the motor case 8. Finally, the impeller 3 and the diffuser 2 are sequentially removed upward and re-installed in the reverse order.

The internal pump is detached or attached by various handling tools according to each component.

FIG. 5 shows an example of the internal pump handling tool. In the figure, reference numeral 16 denotes a handling tool for handling the stretch tube nut 5, which can be attached or detached from the stretch tube 4 by a predetermined operation after being housed in the motor cover 10 by the internal pump handling tool driving device. it can. Reference numeral 25 in the drawing indicates various sensors attached to the drive unit of the handling tool 16.

A device for performing a handling operation using such various handling tools is provided at a lower portion of the reactor pressure vessel.

That is, an internal pump handling tool driving device 17 that handles each component of the internal pump and raises or lowers the handling tool to the motor case is provided on the pivotable platform. Various handling tools are installed on the above-mentioned driving device, and fulfill its purpose.

All of these operations are performed by an operator operating a push button or the like on a control panel from a control room by remote driving.

(Problems to be Solved by the Invention) In the above configuration, for example, when handling the internal pump as shown in FIG. 5, the handling tool 16 is installed on the internal pump handling tool driving device 17 and is controlled by the driving device. , Is inserted into the motor case 8 and performs a predetermined operation to mount and remove the components of the internal pump.

In this case, when the handling tool 16 enters the motor case 8, the operator cannot directly recognize the status of the handling tool 16, and the access to the handling tool 16 is very difficult. Therefore, the work must be performed with care and requires a lot of work time. In addition, if a trouble occurs during the operation of the handling tool, an alarm indicating the trouble causes the user to act on the countermeasure for the processing based on manual or daily knowledge.

The present invention has been made to solve the above problems,
When operating the handling equipment, the equipment can be monitored even in places where it can not be visually confirmed, the work status is recognized by the image, and if an abnormality occurs, the type of abnormality and the corresponding processing etc. It is an object of the present invention to provide a device for handling an internal pump which can be displayed on the display and the like to improve the reliability of the operation.

[Configuration of the invention]

(Means for Solving the Problems) The present invention includes a plurality of sensors for obtaining position, angle, and rotation information attached to a drive unit of a stretch tube nut handling tool or an internal pump handling tool driving device;
A signal processing device that processes various signals of position information, angle information, and rotation information from the plurality of sensors, an image conversion device that converts an output from the signal processing device into image information, and a signal from the signal processing device. A data recording device, an abnormality detection and response output device for judging a signal from the data recording device to detect an abnormal state, and output a content and a response to the abnormality, the image conversion device, the data A recording device and a CRT for displaying signals of the abnormality detection and response output device.

(Operation) The driving unit of the handling device according to the present invention is provided with sensors for generating various signals such as position information, moving operation information and turning operation information, and the signals of these sensors are processed by a signal processing device. . An image signal for converting the processed signal into an image signal is passed, and an image of the handling device and a quantitative position are displayed on a screen of the CRT. The output of the signal processing device is recorded by a data recording device. Further, it is determined whether or not the handling tool is operating normally based on the output of the signal processing device. If the handling tool is abnormal, the type is fixed, and the corresponding measure is output to the abnormality detection and corresponding measure output device. In addition, these output signals are displayed on the CRT and controlled. If an abnormality is detected,
The cause is estimated by searching from the phenomenon, and when the cause is determined, the countermeasure is selected. Then, it works by a knowledge engineering method of displaying the cause of the problem and the countermeasure on the CRT.

(Embodiment) One embodiment of an internal pump handling apparatus according to the present invention will be described with reference to FIGS. 1 and 2. FIG.

In FIG. 1, reference numeral 18 denotes various sensors 25 attached to the drive unit of the internal pump handling device 16 or 17.
This signal processing device inputs the signal of
Are input to the image conversion device 19 and the data recording device 20. The output signal of the data recording device 20 is input to the abnormality detection and response output device 21. The devices 19, 20, and 21 are controlled by a computer 22, and their signals are input to a CRT 23 and displayed as images. Note that 24 is an input signal from various sensors.

Next, the operation state of the handling device will be described with reference to FIG.

That is, the image is moved on the CRT 23 in accordance with the operation of the handling device, and the current situation is recognized. Therefore, the fifth
A sensor 25 for detecting position information, rotation information, and angle information of the device indicated by the handling tool 16 in the figure is attached.
The signal 24 of the sensor 25 is transmitted to the signal processing device 18 via the control panel.
Enter The signal of this signal processing device 18 is
22 and input the image of the handling device according to the operation of the handling device.
Move on the screen of CRT23. At the same time as the image, the signal of the signal processing device 18 is converted into a physical unit value and displayed on the CRT 23.

An expert tool is applied for the identification and handling of abnormalities.

As described above, sensors 25 such as a proximity switch, a limit switch, a torque meter, and a load cell are attached to the drive unit of the handling device of the present invention. These sensors 25
The signal 24 of the position information, the angle information and the rotation information is obtained from, and these signals 24 are input to the signal processing device 18. For example, the load of the load cell is set to 200 kg ± 10 kg as a sensor. Then, the handling device is operated, and the signal of the load cell is processed by the signal processing device 18. Next, the signal processing device 18
From the computer 22 and determines that it is normal (200k
g) Operate the graphic display and display an image on CRT23. If the load is abnormal (250 kg), search for load abnormalities based on the problem phenomenon and estimate the cause. When the cause can be determined, a countermeasure is selected, and the cause of the problem and the countermeasure are displayed on the CRT 23. Examples of failure phenomena include the inability to open and close the valve, the occurrence of abnormal torque, the inability to rotate, the inability to seat the device, and the abnormal load. The display of the countermeasure includes, for example, a check of an air hose, a check of a power cable, a check of a hydraulic hose, a check of pressure setting, and a check of inclination of the device.

In this manner, the operator can recognize the current state of the handling work of the internal pump as being abnormal, and can immediately take measures when an abnormality occurs, thereby improving the reliability of the operation.

〔The invention's effect〕

According to the present invention, the situation of the handling tool can always be recognized as an image in the invisible motor case, and if there is an abnormality, the countermeasure is output immediately, so that the reliability of the handling operation of the internal pump is improved. , Improve work efficiency,
Exposure reduction of the operator can be achieved.

[Brief description of the drawings]

1 is a block diagram showing an embodiment of an internal pump handling device according to the present invention, FIG. 2 is a system diagram showing a specific example in FIG. 1, and FIG. 3 is a longitudinal sectional view showing an internal pump. FIG. 4 is an exploded view of the internal pump in FIG. 3, and FIG. 5 is a longitudinal sectional view showing a state in which a handling tool is incorporated in the motor casing in FIG. DESCRIPTION OF SYMBOLS 1 ... Pump part, 2 ... Diffuser, 3 ... Impeller, 4 ... Stretch tube, 5 ... Stretch tube nut, 6 ... Nuclear pressure vessel, 7 ... Stub tube, 8 ... Motor case, 9 ... ... Motor, 10 ... Motor cover, 11 ... Stud bolt, 12 ... Nut, 13,14 ... Shaft, 15 ... Secondary seal, 16 ... Stretch tube nut handling tool, 17 ... Internal pump handling Tool driving device, 18 …… Signal processing device, 19 …… Image conversion device, 20 …… Data recording device, 21 …… Abnormality detection and response processing output device, 22 …… Computer, 23 …… CRT, 24 …… Various Signal from sensor, 25 …… Sensor.

Claims (1)

(57) [Claims] A plurality of sensors for obtaining position, angle, and rotation information attached to a drive unit of a stretch tube nut handling tool or an internal pump handling tool driving device;
A signal processing device that processes various signals of position information, angle information, and rotation information from the plurality of sensors, an image conversion device that converts an output from the signal processing device into image information, and a signal from the signal processing device. A data recording device, an abnormality detection and response output device for judging a signal from the data recording device to detect an abnormal state, and output a content and a response to the abnormality, the image conversion device, the data An internal pump handling device, comprising: a recording device; and a CRT for displaying a signal of the abnormality detection and response output device.