Laser position detection device of RPV integral bolt tensioner

Abstract

The present application relates to a kind of laser position detection devices of RPV integral bolt stretcher, including laser emission device and laser detection device.RPV integral bolt stretcher needs to obtain the real-time relative position relative to pressure vessel cylinder flange in the process of centering with reactor pressure vessel, to provide position feedback signal for the centering of RPV integral bolt stretcher.Laser position detection device used in the present application, laser is emitted by laser emission device installed on the support ring of RPV integral bolt stretcher, laser is received by laser receiving device sensor installed on cylinder flange, sensor inputs photoelectric signal to electric control box, signal is converted into position coordinate signal after processing, and then output to RPV integral bolt stretcher control system, to realize the position detection of RPV integral bolt stretcher relative to cylinder flange.The present application improves the position detection precision of RPV integral bolt stretcher in existing engineering application, shortens the centering operation time, and reduces the irradiation time of operator.

Description

Technical Field

[0001] This invention relates to a position detection device, and more particularly to a device for detecting the relative position of an RPV integral bolt tensioning machine and a reactor pressure vessel. Background Technology

[0002] The RPV integral bolt tensioning machine is an essential piece of equipment for closing and opening reactor pressure vessels. During the opening and closing operations, the RPV integral bolt tensioning machine needs to be aligned and positioned with the threaded holes of the reactor pressure vessel's flange to ensure the safe and reliable insertion and removal of the main bolts. During the hoisting and alignment process, it is necessary to obtain the relative position of the RPV bolt tensioning machine to the flange to provide position feedback signals and assist in completing the alignment operation.

[0003] Currently, existing RPV integral bolt tensioning machines lack dedicated position detection devices. During the alignment process, visual inspection or measurement with a steel ruler is used to manually verify whether the RPV integral bolt tensioning machine has met the alignment requirements. This existing alignment process has the following shortcomings:

[0004] 1) The low detection accuracy leads to excessive centering accuracy of the RPV bolt tensioning machine, resulting in a high risk during the main bolt screwing-in and screwing-out operation.

[0005] 2) The testing process takes a long time, increasing the radiation exposure of the workers. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a laser position detection device for an RPV integral bolt tensioning machine, comprising two sets of laser emitting devices, two sets of laser receiving devices, and an electrical control box.

[0007] The laser emitting device and the laser receiving device are arranged vertically along the RPV axis.

[0008] The laser emitting device includes a mounting base and a laser emitter.

[0009] The fixing seat is fixed to the outside of the support ring of the RPV integral bolt tensioning machine, and the laser emitter is connected to the inner hole of the fixing seat.

[0010] The laser receiving device includes a positioning plate for closing the cover, a positioning plate for opening the cover, and a photoelectric sensor.

[0011] The aforementioned cover-closing positioning plate is used for RPV integral bolt tensioning cover operation. The two outwardly protruding stops of the cover-closing positioning plate are positioned and matched with the inner stops of the two cylindrical flange threaded holes, so as to achieve precise positioning of the cover-closing positioning plate relative to the cylindrical flange threaded holes.

[0012] The aforementioned cover-opening positioning plate is used for the cover-opening operation of the RPV integral bolt stretching machine. The V-shaped groove on the left side of the cover-opening positioning plate is tangentially fitted with the outer diameter of a main bolt, and the positioning surface on the right side of the cover-opening positioning plate is tangentially fitted with the outer diameter of another spaced main bolt, thereby achieving precise positioning of the cover-opening positioning plate relative to the main bolt.

[0013] The photoelectric sensor is installed on the positioning plate for closing the cover during the cover-closing operation and on the positioning plate for opening the cover during the cover-opening operation.

[0014] The photoelectric sensor is positioned by two sets of positioning pins and positioning plates for closing and opening the cover, thereby achieving precise positioning of the photoelectric sensor relative to the threaded hole of the cylinder flange during the closing operation and precise positioning of the photoelectric sensor relative to the main bolt during the opening operation.

[0015] The electrical control box includes a power supply module, a signal processing module, and a position signal output module. The signal processing module can process the signals from the photoelectric sensor and convert them into position signals of the RPV integral bolt tensioning machine, which are then output to the RPV integral bolt tensioning machine control system through the position signal output module.

[0016] The laser position detection device of the RPV integral bolt tensioning machine uses a laser emitter to emit laser light and a photoelectric sensor to receive the laser light. The laser signal is then converted into a position coordinate signal and output to the control system of the RPV integral bolt tensioning machine, thus detecting the relative position of the RPV integral bolt tensioning machine to the cylinder flange. The principle and process of position detection are further explained below:

[0017] The positional relationship between the RPV integral bolt tensioning machine and the reactor pressure vessel flange can be completely constrained within a plane using the coordinates of two points. Let the coordinates of the origin of the photoelectric sensor of one laser receiver be defined as A(0,0), and the coordinates of any laser point received by this photoelectric sensor relative to point A be defined as (X1, Y1). Let the coordinates of the origin of the photoelectric sensor of another laser receiver be defined as B(0,0), and the coordinates of any laser point received by this photoelectric sensor relative to point B be defined as (X2, Y2).

[0018] After the laser receiving device is installed, A(0,0) and B(0,0) are the centering target positions of the RPV integral bolt tensioning machine relative to the cylindrical flange, and (X1, Y1) and (X2, Y2) are the real-time position coordinates of the RPV integral bolt tensioning machine relative to the cylindrical flange.

[0019] During position detection, the laser emitting device is remotely activated. After receiving the laser, the laser receiving device outputs two photoelectric signals to the electrical control box. The signals are processed and converted into position coordinate signals (X1, Y1) and (X2, Y2), and remotely output to the control system of the RPV integral bolt tensioning machine. This realizes the position detection of the RPV integral bolt tensioning machine relative to the reactor pressure vessel cylinder flange. When the detected position coordinate signals are (0,0) and (0,0), it indicates that the RPV integral bolt tensioning machine is completely aligned with the cylinder flange.

[0020] The present invention has the following advantages and outstanding technical effects:

[0021] 1) It automates position detection, eliminating the need for manual measurement.

[0022] 2) High detection accuracy improves the positioning accuracy of the bolt tensioning machine and the pressure vessel flange.

[0023] 3) The testing process does not occupy the critical path time of the bolt tensioning machine, thus reducing the radiation dose to the operators. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the working conditions of the present invention.

[0025] Figure 2 This is a schematic diagram of the arrangement of the present invention under working conditions.

[0026] Figure 3 This is an isometric view of the structure of this invention.

[0027] Figure 4 , 5 Figures 6 and 7 are schematic diagrams of the structure of this invention.

[0028] Figure 6 This is a schematic diagram of the structure of the present invention. Figure 5 Axonometric sectional view.

[0029] Figure 8 This is a schematic diagram of the structure of the present invention. Figure 7 Top view.

[0030] In the picture:

[0031] 1—Laser emitting device; 11—Fixed base; 12—Laser emitting device; 2—Laser receiving device; 21—Loop closing positioning plate; 22—Photoelectric sensor; 23—Loop opening positioning plate; 3—Electrical control box.

[0032] 4—Main bolt, 5—Top cover flange, 6—Cylinder flange, 7—RPV integral bolt tensioning machine support ring. Detailed Implementation

[0033] The present invention provides a laser position detection device for an RPV integral bolt tensioning machine, comprising two sets of laser emitting devices 1, two sets of laser receiving devices 2, and an electrical control box 3.

[0034] The laser emitting device 1 includes a fixed base 11 and a laser emitter 12.

[0035] The fixed base 11 is fixed to the outside of the support ring 7 of the RPV integral bolt tensioning machine, and the laser emitter 12 is connected to the inner hole of the fixed base 11.

[0036] The laser receiving device 2 includes a positioning plate 21 for closing the cover, a positioning plate 23 for opening the cover, and a photoelectric sensor 22.

[0037] like Figure 5 and Figure 6 As shown, the cover-closing positioning plate 21 is used for RPV integral bolt tensioning cover operation. The two outwardly protruding stopes of the cover-closing positioning plate 21 are positioned and matched with the inner stopes of the threaded holes of the two cylindrical flanges 6, so as to achieve precise positioning of the cover-closing positioning plate 21 relative to the threaded holes of the cylindrical flanges 6.

[0038] like Figure 7 and Figure 8 As shown, the cover-opening positioning plate 23 is used for the cover-opening operation of the RPV integral bolt tensioning machine. The V-shaped groove on the left side of the cover-opening positioning plate 23 is tangentially fitted with the outer diameter of a main bolt 4, and the positioning surface on the right side of the cover-opening positioning plate 23 is tangentially fitted with the outer diameter of another spaced main bolt 4, so as to achieve precise positioning of the cover-opening positioning plate 23 relative to the main bolt 4.

[0039] The photoelectric sensor 22 is installed on the closing positioning plate 21 during the closing operation and on the opening positioning plate 23 during the opening operation.

[0040] The photoelectric sensor 22 is positioned by two sets of positioning pins and positioning plates 21 for closing and 23 for opening, thereby achieving precise positioning of the photoelectric sensor 22 relative to the threaded hole of the cylinder flange 6 during the closing operation and precise positioning of the photoelectric sensor 22 relative to the main bolt 4 during the opening operation.

[0041] The electrical control box 3 includes a power supply module, a signal processing module, and a position signal output module. The signal processing module can process the signals from the photoelectric sensor and convert them into position signals of the RPV integral bolt tensioning machine, which are then output to the RPV integral bolt tensioning machine control system through the position signal output module.

[0042] The laser position detection device of the RPV integral bolt tensioning machine uses a laser emitting device 1 to emit laser light and a photoelectric sensor 22 of a laser receiving device 2 to receive the laser light. The laser signal is then converted into a position coordinate signal and output to the control system of the RPV integral bolt tensioning machine, thus detecting the relative position of the RPV integral bolt tensioning machine with respect to the cylinder flange 6. The following explains the principle and process of position detection. Figure 2 For example, the present invention will be further described as follows:

[0043] The positional relationship between the RPV integral bolt tensioning machine and the reactor pressure vessel flange 6 can be completely constrained in a plane using the coordinates of two points. The coordinates of the origin of the photoelectric sensor 22 of one laser receiver 2 are defined as A(0,0), and the coordinates of any laser point received by the photoelectric sensor 22 relative to point A are defined as (X1, Y1). The coordinates of the origin of the photoelectric sensor 22 of the other laser receiver 2 are defined as B(0,0), and the coordinates of any laser point received by the photoelectric sensor 22 relative to point B are defined as (X2, Y2).

[0044] After the laser receiver 2 is installed, A(0,0) and B(0,0) are the centering target positions of the RPV integral bolt tensioning machine relative to the cylindrical flange 6, and (X1, Y1) and (X2, Y2) are the real-time position coordinates of the RPV integral bolt tensioning machine relative to the cylindrical flange 6.

[0045] During position detection, the laser emitting device 1 is remotely activated. After receiving the laser, the laser receiving device 2 outputs a photoelectric signal to the electrical control box 3. The signal is processed and converted into position coordinate signals (X1, Y1) and (X2, Y2), and remotely output to the control system of the RPV integral bolt tensioning machine. This realizes the position detection of the RPV integral bolt tensioning machine relative to the reactor pressure vessel cylinder flange 6. When the detected position coordinate signal is (0,0) or (0,0), it indicates that the RPV integral bolt tensioning machine is completely aligned with the cylinder flange 6.

[0046] This invention discloses a laser position detection device for an RPV integral bolt tensioning machine. The device utilizes a laser emitted by a laser emitter 1. Upon receiving the laser, a laser receiver 2 outputs a photoelectric signal to an electrical control box 3. The signal is processed and converted into a position coordinate signal, which is then output to the RPV integral bolt tensioning machine control system. This allows for real-time detection of the RPV integral bolt tensioning machine's position, assisting in the alignment of the RPV integral bolt tensioning machine with the pressure vessel's flange 6. This automates the position detection of the RPV integral bolt tensioning machine, improves detection and positioning accuracy, and reduces operator working time and radiation exposure.

[0047] The above-described specific embodiments are only used to explain the design concept of the present invention, and are intended to facilitate understanding and implementation by those skilled in the art, rather than to limit the scope of protection of the present invention. Therefore, equivalent changes made using the design concept of the present invention still fall within the scope of protection of the present invention.

Claims

1. A laser position detection device for an RPV integral bolt tensioning machine, characterized in that, Includes a laser emitting device, a laser receiving device, an electrical control box, and a control system. The laser emitting device includes a fixed base and a laser emitter, and the fixed base is mounted on the RPV integral bolt tensioning machine; The laser receiving device includes a cover-closing positioning plate, a cover-opening positioning plate, and a photoelectric sensor. The cover-closing positioning plate uses two outwardly protruding stops to position and engage with the inner stops of the threaded holes of the two cylindrical flanges. The cover-opening positioning plate uses a left-side V-groove to position and engage with the outer diameter of a main bolt tangentially. After the cover is opened, the right-side positioning surface is used to position and engage with the outer diameter of another spaced main bolt tangentially. The photoelectric sensor is mounted on either the cover-closing positioning plate or the cover-opening positioning plate. The positional relationship between the RPV integral bolt tensioning machine and the cylindrical flange is constrained within a plane using the coordinates of two points, specifically including: When a cover-closing operation is required, the coordinates of the origin center of the photoelectric sensor of one laser receiver on the cover-closing positioning plate are defined as A(0,0), and the coordinate position of any laser point received by the photoelectric sensor relative to point A is defined as (X1, Y1); the coordinates of the origin center of the photoelectric sensor of another laser receiver are defined as B(0,0), and the coordinate position of any laser point received by the photoelectric sensor relative to point B is defined as (X2, Y2). During detection, the laser emitter emits a laser, and the two coordinate positions (X1, Y1) and (X2, Y2) output by the photoelectric sensor of the laser receiver are the real-time position coordinate values ​​of the RPV integral bolt tensioning machine relative to the cylinder flange. When the lid opening operation is required, the coordinates of the origin center of the photoelectric sensor of one laser receiver on the lid opening positioning plate are defined as A(0,0), and the coordinate position of any laser point received by the photoelectric sensor relative to point A is defined as (X1, Y1); the coordinates of the origin center of the photoelectric sensor of another laser receiver are defined as B(0,0), and the coordinate position of any laser point received by the photoelectric sensor relative to point B is defined as (X2, Y2). During detection, the laser emitting device emits a laser, and the two coordinate positions (X1, Y1) and (X2, Y2) output by the photoelectric sensor of the laser receiver are the real-time position coordinate values ​​of the RPV integral bolt tensioning machine relative to the cylinder flange. The photoelectric sensor converts the light signal into an electrical signal and inputs it to the electrical control box. After the electrical signal is processed, the electrical control box converts it into a position coordinate signal and outputs it to the RPV integral bolt tensioning machine control system for real-time alignment until the coordinate values ​​of (X1, Y1) and (X2, Y2) are close to A(0, 0) and B(0, 0). At this time, the RPV integral bolt tensioning machine is completely aligned with the cylinder flange.

2. The position detection device as described in claim 1, characterized in that, The laser emitting device and the laser receiving device are arranged vertically along the RPV axis.

3. The laser receiving device as described in claim 1, characterized in that, The sensor is a photoelectric position sensor.

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