CN-116202416-B - Laser position detection device of RPV integral bolt stretcher

CN116202416BCN 116202416 BCN116202416 BCN 116202416BCN-116202416-B

Abstract

The invention relates to a laser position detection device of an RPV integral bolt stretcher, which comprises a laser emission device and a laser detection device. In the centering process of the RPV integral bolt stretcher and the reactor pressure vessel, the real-time relative position of the RPV integral bolt stretcher relative to the flange of the pressure vessel cylinder body needs to be acquired, and a position feedback signal is provided for centering of the RPV integral bolt stretcher. According to the laser position detection device, laser is emitted through the laser emitting device arranged on the support ring of the RPV integral bolt stretcher, the laser receiving device arranged on the cylinder flange receives the laser, the sensor inputs photoelectric signals into the electric cabinet, the signals are converted into position coordinate signals through processing and then are output to the control system of the RPV integral bolt stretcher, and the position detection of the RPV integral bolt stretcher relative to the cylinder flange is achieved. The invention improves the position detection precision of the RPV integral bolt stretcher in the existing engineering application, shortens the centering operation time and reduces the irradiation time of operators.

Inventors

ZHOU WEN
WANG XIAOXUAN
MENG FANJIN
WANG BAO
XING JI
WANG ZEPING
ZHANG YAOCHUN
FANG XIAOLU
WEI MENG
MA XIAORONG
ZHANG YABIN
ZHAO ZHANGUO

Assignees

北京雷蒙赛博机电技术有限公司
中国核电工程有限公司

Dates

Publication Date: 20260512
Application Date: 20211130

Claims (3)

1. A laser position detection device for an RPV integral bolt stretcher is characterized by comprising a laser emission device, a laser receiving device, an electric cabinet and a control system, The laser emission device comprises a fixing seat and a laser emitter, and the fixing seat is arranged on the RPV integral bolt stretcher; The laser receiving device comprises a positioning plate for closing the cover, a positioning plate for opening the cover and a photoelectric sensor, wherein the positioning plate for closing the cover is in positioning fit with two flange threaded holes of the cylinder by utilizing two outwards protruding rabbets, the positioning plate for opening the cover is in tangential positioning fit with the outer diameter of a main bolt by utilizing a left V-shaped groove, the positioning plate for opening the cover is in tangential positioning fit with the outer diameter of another interval main bolt by utilizing a right positioning surface after opening the cover, and the photoelectric sensor is arranged on the positioning plate for closing the cover or the positioning plate for opening the cover; The position relation of the RPV integral bolt stretcher relative to the cylinder flange is restrained by two point coordinates in a plane, and the RPV integral bolt stretcher specifically comprises: When the cover closing operation is needed, the center origin coordinate of a photoelectric sensor of one laser receiving device on a positioning plate for cover closing is defined as A (0, 0), the coordinate position of any laser point received by the photoelectric sensor relative to the A point is defined as (X1, Y1), the center origin coordinate of a photoelectric sensor of the other laser receiving device is defined as B (0, 0), the coordinate position of any laser point received by the photoelectric sensor relative to the B point is defined as (X2, Y2), and when the cover closing operation is detected, the laser emitting device emits laser, and 2 coordinate positions (X1, Y1) and (X2, Y2) output by the photoelectric sensor of the laser receiving device are real-time position coordinate values of the RPV integral bolt stretcher relative to a cylinder flange; When the cover opening operation is needed, the center origin coordinate of a photoelectric sensor of one laser receiving device on the cover opening positioning plate is defined as A (0, 0), the coordinate position of any laser point received by the photoelectric sensor relative to the A point is defined as (X1, Y1), the center origin coordinate of the photoelectric sensor of the other laser receiving device is defined as B (0, 0), the coordinate position of any laser point received by the photoelectric sensor relative to the B point is defined as (X2, Y2), the laser emitting device emits laser during detection, and the 2 coordinate positions (X1, Y1) and (X2, Y2) output by the photoelectric sensor of the laser receiving device are real-time position coordinate values of the RPV integral bolt stretcher relative to the flange of the cylinder body; the photoelectric sensor converts the optical signal into an electric signal, the electric signal is input into the electric cabinet, the electric signal is converted into a position coordinate signal by the processing electric cabinet and then is output to the control system of the RPV integral bolt stretcher for real-time centering until coordinate values of (X1, Y1) and (X2, Y2) are close to A (0, 0) and B (0, 0), and at the moment, the RPV integral bolt stretcher is completely centered with the flange of the cylinder.
2. The position detection apparatus according to claim 1, wherein the laser emitting means and the laser receiving means are arranged vertically up and down along the RPV axis.
3. The laser light receiving device according to claim 1, wherein the sensor is an optoelectronic position sensor.

Description

Laser position detection device of RPV integral bolt stretcher Technical Field The invention relates to a position detection device, in particular to a relative position detection device for an RPV integral bolt stretcher and a reactor pressure vessel. Background The RPV integral bolt stretcher is a necessary device for closing and opening the cover of a reactor pressure vessel. When the RPV integral bolt stretcher is used for opening and closing a cover, the RPV integral bolt stretcher needs to be positioned in a centering way with a threaded hole of a flange of a cylinder body of the reactor pressure vessel, so that the safety and reliability of the RPV integral bolt stretcher when a main bolt is planted or screwed out are ensured. In the hoisting and centering process of the RPV integral bolt stretcher, the relative position of the RPV bolt stretcher relative to the cylinder flange needs to be acquired, a position feedback signal is provided for centering, and the centering operation is assisted. At present, no special position detection device exists in the existing RPV integral bolt stretcher, and in the centering process of the RPV integral bolt stretcher, a visual inspection or steel rule measuring mode is adopted to manually measure and test whether the RPV integral bolt stretcher completes the centering requirement. In the existing centering operation process, the following defects exist: 1) The detection precision is lower, and the centering precision of the RPV bolt stretcher is out of tolerance, so that the risk of the main bolt screwing-in and unscrewing operation process is larger. 2) The detection process requires longer time, and the irradiation metering of operators is increased. Disclosure of Invention In order to solve the problems, the invention provides a laser position detection device of an RPV integral bolt stretcher, which comprises 2 sets of laser emission devices, 2 sets of laser receiving devices and an electric cabinet. The laser emitting device and the laser receiving device are vertically arranged up and down along the RPV axis. The laser emission device comprises a fixed seat and a laser emitter. The fixing seat is fixed on the outer side of the supporting ring of the RPV integral bolt stretcher, and the laser transmitter is connected with the inner hole of the fixing seat. The laser receiving device comprises a positioning plate for closing the cover, a positioning plate for opening the cover and a photoelectric sensor. The positioning plate for closing the cover is used for the operation of closing the cover of the RPV integral bolt stretching machine, and the two outwards protruding rabbets of the positioning plate for closing the cover are matched with the rabbets in the threaded holes of the two barrel flanges in a positioning way, so that the positioning plate for closing the cover is accurately positioned relative to the threaded holes of the barrel flanges. The positioning plate for uncovering is used for uncovering operation of the RPV integral bolt stretcher, the V-shaped groove on the left side of the positioning plate for uncovering is in tangential fit with the outer diameter of one main bolt, the positioning surface on the right side of the positioning plate for uncovering is in tangential fit with the outer diameter of the other interval main bolt, and accurate positioning of the positioning plate for uncovering relative to the main bolt is achieved. The photoelectric sensor is arranged on the positioning plate for closing the cover during cover closing operation and is arranged on the positioning plate for opening the cover during cover opening operation. The photoelectric sensor is positioned by the two groups of positioning pins, the positioning plate for closing the cover and the positioning plate for opening the cover, so that the photoelectric sensor is accurately positioned relative to the flange threaded hole of the cylinder body during cover closing operation, and the photoelectric sensor is accurately positioned relative to the main bolt during cover opening operation. The electric cabinet comprises a power supply module, a signal processing module and a position signal output module, wherein the signal processing module can process signals of the photoelectric sensor, convert the signals into position signals of the RPV integral bolt stretcher, and output the position signals to the control system of the RPV integral bolt stretcher through the position signal output module. The laser position detection device of the RPV integral bolt stretcher transmits laser through the laser transmitting device and receives the laser through the photoelectric sensor of the laser receiving device, converts a laser signal into a position coordinate signal and outputs the position coordinate signal to the control system of the RPV integral bolt stretcher, and realizes the detection of the relative position of the RPV integral bolt stretcher relative to the cylinder fl