Automatic blocking mechanism and working method for evaporator maintenance

Abstract

The present invention discloses an automatic plugging mechanism and working method for evaporator maintenance, the automatic plugging mechanism comprises an integral rotating motor, a lifting mechanism, a welding gun and plug rotating mechanism, a laser rangefinder and a visual system, the automatic plugging mechanism is integrally mounted on a rocker arm, the automatic plugging mechanism can be rotated under the drive of the integral rotating motor, the lifting mechanism can adjust the height of the plug and the welding gun, and conveniently approach the working plane to achieve the plugging action, the welding gun and plug rotating mechanism can drive the plug to rotate for plugging, and drive the welding gun to rotate at the same time, and perform circumferential welding after the plug is plugged. The laser rangefinder is used to measure the distance between the plugging mechanism and the plugging plane, and the visual system is used for positioning and observation.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear power plant evaporator maintenance, and in particular relates to an automatic blocking mechanism and a working method of a remote automatic maintenance device for a nuclear power plant evaporator. Background Art

[0002] During the shutdown and overhaul of a nuclear power plant, the evaporator needs to be inspected and repaired. In order to prevent radioactive gases or liquids from causing unnecessary harm to maintenance personnel, improve the quality of repair and shorten the repair time, remote automated operation equipment is required. During the operation of the equipment, it is necessary to accurately identify the position to be blocked and ensure that the plug can be automatically installed and welded during the blocking process. Summary of the invention

[0003] The purpose of the present invention is to solve the problems of automatic positioning, plug installation and welding of remote automatic operation equipment for evaporator maintenance in nuclear power plants and to propose an automatic plugging mechanism and working method for evaporator maintenance.

[0004] In order to achieve the above object, the present invention adopts the following technical solution:

[0005] An automatic plugging mechanism for evaporator maintenance, comprising an integral rotating motor 1, a lifting mechanism 2, a welding gun and plug rotating mechanism 3, a laser rangefinder 4 and a visual system 5;

[0006] The integral rotating motor 1 can drive the automatic blocking mechanism to rotate around the motor shaft, thereby increasing the flexibility and accessibility of the device;

[0007] The lifting mechanism 2 includes an L-shaped connecting plate 9, a lifting motor 6, a lifting screw nut mechanism 7 and a lifting platform 8. The L-shaped connecting plate 9 is connected to the integral rotating motor 1, and can realize 360° full-position rotation under the drive of the integral rotating motor 1. The lifting motor 6 and the lifting screw nut mechanism 7 are fixed on the L-shaped connecting plate 9 and connected by a synchronous pulley; the lifting platform 8 is installed on the lifting screw nut mechanism 7;

[0008] The welding gun and plug rotating mechanism 3 is installed on the lifting platform 8, and includes a rotating drive motor 10, a plug rod 11 and a welding gun 12. The rotating drive motor 10 is connected to the plug rod 11 through a synchronous belt and drives the plug rod 11 to rotate, thereby driving the plug installed at the front end of the plug rod 11 to rotate together. The welding gun 12 is installed on the plug rod 11 and rotates synchronously with the plug rod 11.

[0009] The laser rangefinder 4 is installed on the lifting platform 8 to measure the distance and ensure that the plug and the blocking plane maintain a preset distance;

[0010] The visual system 5 is installed on the lifting platform 8, and includes a camera 13, an illumination light source 14 and a cross-spot laser 15. The camera 13 is used to observe the internal environment of the evaporator in real time, the illumination light source 14 is used to illuminate to ensure the display effect of the camera 13, and the cross-spot laser 15 is used to locate the center position of the plugging hole.

[0011] Preferably, the welding gun and plug rotating mechanism 3 is installed on the left end of the lifting platform 8 by screws, the laser rangefinder 4 is installed on the middle part of the lifting platform 8 by screws, and the visual system 5 is installed on the right end of the lifting platform 8 by screws.

[0012] Preferably, the lifting motor 6 and the lifting screw nut mechanism 7 are fixed to the L-shaped connecting plate 9 by screws, and the lifting platform 8 is installed on the lifting screw nut mechanism 7 by screws.

[0013] Preferably, the welding gun 12 is mounted on the plug rod 11 by a screw clamping device.

[0014] The working method of an automatic plugging mechanism for evaporator maintenance, the automatic plugging mechanism is used to automatically find and locate the plugging position and automatically install the plug and weld the plug. The automatic plugging mechanism is installed as a whole on a rocker arm, and the rotation of the automatic plugging mechanism is realized under the drive of the overall rotating motor 1, thereby increasing its flexibility and position accessibility; the lifting mechanism 2 adjusts the height of the plug and the welding gun 12 installed at the front end of the plug rod 11, and with the assistance of the laser rangefinder 4, the automatic plugging mechanism is adjusted to a preset height, and the welding gun and plug rotating mechanism 3 can drive the plug to find the position of the hole to be plugged with the assistance of the visual system 5, and rotate to plug, and then control the welding gun 12 to perform welding plugging.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. By installing the integral rotating motor on the rocker arm, the automatic positioning and installation of the automatic blocking mechanism can be realized, which expands the working range and enhances the maneuverability of the equipment;

[0017] 2. By adjusting the lifting mechanism and cooperating with the laser rangefinder, the height of the blocking mechanism is automatically adjusted to adapt to the position of the blocking hole, realizing automatic control of the welding gun;

[0018] 3. Use a laser rangefinder to ensure that the plug and the plugging plane maintain a preset distance. Use a visual system to observe the internal environment of the evaporator in real time. The cross-spot laser can locate the center of the plugging hole, so that the equipment can automatically detect the position of the plugging hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a general assembly drawing of the automatic plugging mechanism used for evaporator maintenance of the present invention.

[0020] Figure 2 The invention is a structural diagram of a lifting mechanism of an automatic plugging mechanism for evaporator maintenance.

[0021] Figure 3 The invention is a structural diagram of a welding gun and a plug rotating mechanism of an automatic plugging mechanism for evaporator maintenance.

[0022] Figure 4 It is a structural diagram of a visual system of an automatic plugging mechanism for evaporator maintenance according to the present invention. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1 As shown, an automatic plugging mechanism for evaporator maintenance of the present invention includes an integral rotating motor 1, a lifting mechanism 2, a welding gun and plug rotating mechanism 3, a laser rangefinder 4 and a visual system 5.

[0025] The integral rotating motor 1 can drive the automatic plugging mechanism to rotate around the motor shaft, increasing the flexibility and accessibility of the device. The lifting mechanism 2 can adjust the height of the plug and the welding gun and realize accurate plug installation and welding with the cooperation of the laser rangefinder 4 and the visual system 5, completing the plugging operation with high quality.

[0026] like Figure 2 As shown, the lifting mechanism 2 includes an L-shaped connecting plate 9, a lifting motor 6, a lifting screw nut mechanism 7 and a lifting platform 8. The L-shaped connecting plate 9 is connected to the integral rotating motor 1, and can achieve 360° full-position rotation under the drive of the L-shaped connecting plate 9. The lifting motor 6 and the lifting screw nut mechanism 7 are fixed to the L-shaped connecting plate 9 by screws and connected by synchronous pulleys. The lifting platform 8 is installed on the lifting screw nut mechanism 7 by screws.

[0027] like Figure 1 and Figure 3 As shown, the welding gun and plug rotating mechanism 3 is installed on the left end of the lifting platform 8 by screws, and includes a rotating drive motor 10, a plug rod 11 and a welding gun 12. The rotating drive motor 10 drives the plug rod 11 to rotate through a synchronous belt, thereby driving the plug at the front end of the plug rod to rotate together. The welding gun 12 is installed on the plug rod 11 by a screw clamping device and can rotate synchronously with it.

[0028] like Figure 1 As shown, the laser rangefinder 4 is installed in the middle part of the lifting platform 8 by screws, and is used to measure the distance, so as to ensure that the plug maintains a suitable distance from the blocking plane.

[0029] like Figure 1 and Figure 4As shown, the visual system 5 is installed on the right end of the lifting platform 8 by screws, and includes a camera 13, an illumination light source 14 and a cross-spot laser 15. The camera 13 is used to observe the internal environment of the evaporator in real time, the illumination light source 14 is used to illuminate and ensure the display effect of the camera 13, and the cross-spot laser 15 is used to locate the center position of the plugging hole.

[0030] The working principle of the present invention is as follows:

[0031] The automatic plugging mechanism for evaporator maintenance of the present invention is used to automatically find and locate the plugging position and automatically install the plug and weld the plug. The automatic plugging mechanism is installed as a whole on a rocker arm, and the rotation of the whole mechanism can be realized under the drive of the integral rotating motor 1, thereby increasing its flexibility and position accessibility. The lifting mechanism 2 can adjust the height of the plug and the welding gun, and with the assistance of the laser rangefinder 4, the automatic plugging mechanism can be adjusted to a suitable height. The welding gun and plug rotating mechanism 3 can drive the plug to find the position of the hole to be plugged with the assistance of the visual system 5, and rotate to plug it, and then control the welding gun 12 to perform welding plugging.

Claims

1. An automatic plugging mechanism for evaporator maintenance, characterized in that: It comprises an integral rotating motor (1), a lifting mechanism (2), a welding gun and plug rotating mechanism (3), a laser rangefinder (4) and a visual system (5); The integral rotating motor (1) can drive the automatic blocking mechanism to rotate around the motor shaft, thereby increasing the flexibility and accessibility of the device; The lifting mechanism (2) comprises an L-shaped connecting plate (9), a lifting motor (6), a lifting screw nut mechanism (7) and a lifting platform (8); the L-shaped connecting plate (9) is connected to the integral rotating motor (1) and can achieve 360° full-position rotation under the drive of the integral rotating motor (1); the lifting motor (6) and the lifting screw nut mechanism (7) are fixed on the L-shaped connecting plate (9) and connected via a synchronous pulley; the lifting platform (8) is mounted on the lifting screw nut mechanism (7); The welding gun and plug rotating mechanism (3) is installed on the lifting platform (8), and comprises a rotating drive motor (10), a plug rod (11) and a welding gun (12). The rotating drive motor (10) is connected to the plug rod (11) through a synchronous belt and drives the plug rod (11) to rotate, thereby driving the plug installed at the front end of the plug rod (11) to rotate together. The welding gun (12) is installed on the plug rod (11) and rotates synchronously with the plug rod (11); The laser rangefinder (4) is installed on the lifting platform (8) and is used to measure the distance to ensure that the plug and the blocking plane maintain a preset distance; The visual system (5) is installed on the lifting platform (8), and comprises a camera (13), an illumination light source (14) and a cross-spot laser (15); the camera (13) is used to observe the internal environment of the evaporator in real time, the illumination light source (14) is used to illuminate and ensure the display effect of the camera (13), and the cross-spot laser (15) is used to locate the center position of the plugging hole; The welding gun and plug rotating mechanism (3) is installed on the left end of the lifting platform (8) by screws, the laser rangefinder (4) is installed on the middle part of the lifting platform (8) by screws, and the visual system (5) is installed on the right end of the lifting platform (8) by screws; The lifting motor (6) and the lifting screw nut mechanism (7) are fixed to an L-shaped connecting plate (9) by means of screws, and the lifting platform (8) is mounted on the lifting screw nut mechanism (7) by means of screws.

2. The automatic blocking mechanism for evaporator maintenance according to claim 1, characterized in that: The welding gun (12) is mounted on the plug rod (11) via a screw clamping device.

3. A working method of an automatic plugging mechanism for evaporator maintenance according to claim 1 or 2, characterized in that: The automatic plugging mechanism is used to automatically find and locate the plugging position and automatically install the plug and weld the plug. The automatic plugging mechanism is installed as a whole on a rocker arm. The automatic plugging mechanism is driven by an integral rotating motor (1) to realize the rotation of the automatic plugging mechanism, thereby increasing its flexibility and position accessibility. The lifting mechanism (2) adjusts the height of the plug and the welding gun (12) installed at the front end of the plug rod (11). With the assistance of a laser rangefinder (4), the automatic plugging mechanism is adjusted to a preset height. The welding gun and plug rotating mechanism (3) can drive the plug to find the position of the hole to be blocked with the assistance of a visual system (5), and rotate to block the hole, and then control the welding gun (12) to perform welding blocking.

Images