Laser deep hole straightness measuring device

Abstract

The utility model discloses a laser deep hole straightness measuring device which comprises a walking positioning trolley, a laser transmitting and receiving device and a display control box. The walking positioning trolley comprises a trolley body, four driving wheels and four driven wheels, the four driving wheels and the four driven wheels are arranged at the two ends of the trolley body and distributed in a cross-shaped circumferential mode, the driving wheels are worm wheels, and worms meshed with the four driving wheels and provided with power through a servo motor are arranged on center shafts of the four driving wheels. The laser transmitting and receiving device comprises a positioning seat which is arranged at the deep hole opening and is provided with a laser transmitter at the central position, a laser receiving and reflecting plate which is arranged on the trolley main body, and a video head which can shoot an image of the laser receiving and reflecting plate and transmits the image to the display control box; a center cross mark and concentric circle lines are engraved on the laser receiving and reflecting plate, the center of the center cross mark coincides with the center axes of the four driving wheels and the four driven wheels, and the straightness detection device is efficient in straightness detection and high in precision.

Description

Technical Field

[0001] The utility model relates to a laser deep hole straightness measuring device, belongs to the field of nuclear spent fuel storage and transportation containers, and is used for detecting the straightness of deep blind holes of nuclear spent fuel storage and transportation containers for placing neutron shielding rods. Background Art

[0002] The outer wall of a certain type of nuclear spent fuel storage and transportation container is distributed with two circles of 96 deep blind holes with a diameter of φ80mm and a depth of several meters, with a spacing of 20mm between two holes, which are staggered to place neutron shielding rods. The deep blind holes must not be skewed and the axis straightness must be less than 2mm to ensure the safety performance index of radiation leakage prevention. There are currently ultrasonic detection methods and mechanical contact sensor detection methods for the straightness of deep blind holes. However, the ultrasonic detection method has a low accuracy of only 1-2mm. The mechanical contact sensor detection method has high accuracy, but the structure is complex, the detection efficiency is low, and the equipment is extremely expensive. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a laser deep hole straightness measuring device, which has simple structure, high efficiency and high precision in straightness detection.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A laser deep hole straightness measuring device comprises a walking positioning trolley which can be moved and positioned in the deep hole, a laser transmitting and receiving device which is installed at the deep hole mouth and can transmit and receive laser, and a display control box;

[0006] The walking positioning trolley comprises a trolley body and four driving wheels and four driven wheels arranged at both ends of the trolley body and distributed in a cross circle. The driving wheels are arranged as turbines, and the central axes of the four driving wheels are provided with worms meshing with the four driving wheels and powered by servo motors.

[0007] The laser emitting and receiving device comprises a positioning seat installed at the deep hole and provided with a laser emitter at the center, a laser receiving reflection board installed on the trolley body, and a video head capable of taking images of the laser receiving reflection board and transmitting the images to the display control box; a center cross mark and concentric circles are engraved on the laser receiving reflection board, and the center of the center cross mark coincides with the center axes of the four driving wheels and the four driven wheels;

[0008] The servo motor, laser transmitter and video head are all connected to the display control box.

[0009] A further improvement of the technical solution of the utility model is that the outer edges of the driving wheel and the driven wheel are both provided with rubber structures for shock absorption.

[0010] A further improvement of the technical solution of the utility model is that: the driven wheel is configured as a turbine.

[0011] A further improvement of the technical solution of the utility model is that the servo motor is fixed on the trolley body, and the motor shaft of the servo motor is sleeved with the worm.

[0012] A further improvement of the technical solution of the utility model is that the laser receiving and reflecting plate includes two layers of medium, an inner layer and an outer layer; the outer layer medium is a hard plastic that can be penetrated by the laser and form a light spot, and has a thickness of 1 mm; the inner layer medium is a polarizer that can filter out stray light, and a center cross mark and concentric circles are arranged on the polarizer.

[0013] A further improvement of the technical solution of the utility model is that the interval between the concentric circles is 0.5 mm.

[0014] A further improvement of the technical solution of the utility model is that the display control box includes a power supply and a control panel, and the control panel includes a display area with a screen capable of displaying the position of the light spot, a recording area for recording offset data, and a control button area.

[0015] A further improvement of the technical solution of the utility model is that the screen of the display area has movable and scalable virtual center cross lines and concentric circle lines, and the spacing between the concentric circle lines is 0.5 mm.

[0016] Due to the adoption of the above technical solution, the technical progress achieved by the utility model is:

[0017] The utility model has a simple structure and utilizes the high concentration of the laser beam to accurately measure the straightness of the deep hole by irradiating the laser emitted from the center of the deep hole end face to the radial distance and direction of the light spot of a certain axial section of the deep hole and its center. The straightness detection has high precision and efficiency.

[0018] The utility model can ensure synchronous operation of the driving wheels, smooth walking, and stable radial position positioning through the meshing of the worm gear; the four driven wheels and the four driving wheels can realize two-section support, and at the same time can ensure that their central axes coincide with the central axis of the current deep hole position, providing guarantee for accurate measurement; the laser transmitting and receiving device can ensure accurate display results; the display control box can accurately realize various functions, and the detection results are intuitively displayed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 This is a structural schematic diagram of the utility model walking positioning trolley;

[0021] Figure 3 It is a structural schematic diagram of the positioning seat of the utility model;

[0022] Figure 4 It is a structural schematic diagram of the display control box of the utility model;

[0023] Figure 5 yes Figure 4 Schematic diagram of the recording area;

[0024] Figure 6 yes Figure 4 Schematic diagram of the middle control button area;

[0025] Among them, 1. Traveling and positioning trolley, 2. Laser transmitting and receiving device, 3. Display control box, 4. Trolley body, 5. Servo motor, 6. Worm, 7. Driving wheel, 8. Driven wheel, 9. Positioning seat, 10. Laser transmitter, 11. Laser receiving reflection board, 12. Video head, 13. Display area, 14. Recording area, 15. Control button area. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the embodiments:

[0027] like Figure 1 As shown, a laser deep hole straightness measuring device is a device that utilizes the high concentration of the laser beam to measure the straightness of the deep hole by irradiating the laser emitted from the center of the deep hole end face to the light spot of a certain axial section of the deep hole and its center in the radial distance and direction. It includes a walking and positioning trolley 1, a laser emitting and receiving device 2, and a display control box 3. The walking and positioning trolley 1 can move left and right and position in the deep hole. The laser emitting and receiving device 2 is used to emit a laser beam at the center of the deep hole mouth, reflect the direction and position of the laser spot, and transmit the captured image to the display control box 3. The display control box 3 is used to control the movement and positioning of the walking and positioning trolley 1, control the emission of the laser, and at the same time display, view, and record the deviation value and direction of the center of a deep hole at a certain position.

[0028] like Figure 2 As shown, the walking positioning trolley 1 includes a trolley body 4, and four driving wheels 7 and four driven wheels 8 are respectively arranged at the front and rear ends of the trolley body 4. The four driving wheels 7 and the four driven wheels 8 are all distributed in a cross circle when viewed from the end face of the vehicle body, and the central axes coincide. The four driven wheels and the four driving wheels can realize two-section support, and at the same time can ensure that their central axes coincide with the central axis of the current deep hole position, providing guarantee for accurate measurement.

[0029] The driving wheel 7 is configured as a turbine, and a worm 6 meshing with the four driving wheels 7 is disposed on the central axis of the four driving wheels 7, and the worm 6 is sleeved with the motor shaft of the servo motor 5, and the servo motor 5 is provided with power, and the servo motor 5 is fixed on the trolley body 4. The servo motor 5 is connected to the display control box 3, and the display control box 3 controls the opening and closing and the forward and reverse rotation of the servo motor 5.

[0030] Furthermore, the outer edges of the driving wheel 7 and the driven wheel 8 are both provided with a rubber structure, which can play a shock-absorbing role. The driven wheel 8 can be set as a turbine structure or a rotating wheel structure. The driven wheel of this embodiment is set as a turbine structure.

[0031] The laser emitting and receiving device 2 includes a positioning seat 9 installed at the deep hole. The structure of the positioning seat 9 is as follows: Figure 3 As shown, a laser emitter 10 is arranged at the center position. The laser emitter 10 is connected to the display control box 3, and the emission and shutdown of the laser emitter 10 are controlled by the display control box 3. The laser emitting and receiving device 2 also includes a laser receiving reflection board 11 installed on the trolley body 4 and a video head 12 capable of shooting the image of the laser receiving reflection board 11. The video head 12 is connected to the display control box 3 and can transmit the captured image to the display control box 3 in real time. The laser receiving reflection board 11 includes an inner and outer two-layer medium; the outer layer medium is a hard plastic that can be penetrated by the laser and form a light spot, with a thickness of 1mm; the inner layer medium is a polarizer that can filter out stray light, and the polarizer is engraved with a central cross mark and concentric circles with an interval of 0.5mm, and the center of the central cross mark coincides with the central axis of the four driving wheels 7 and the four driven wheels 8.

[0032] like Figure 4-Figure 6 As shown, the display control box 3 includes a power supply and a control panel. The control panel includes a display area 13 with a screen capable of displaying the spot position, a recording area 14 for recording offset data, and a control button area 15. The screen of the display area 13 has a movable and scalable virtual center crosshairs and concentric circles, and the spacing of the concentric circles is 0.5 mm.

[0033] When the video head 12 transmits the captured light spot image on the laser receiving reflection plate 11 to the display control box 3, the image is displayed in the display area 13, and the virtual center crosshairs and concentric circles on the display area 13 are overlapped with the center crosshairs and concentric circles on the laser receiving reflection plate 11, the distance between the light spot and the center crosshairs center is read from the concentric circles, the rotation angle of the center crosshairs is read, and the distance from the trolley to the end face of the deep hole is recorded in the recording area 14, and the three values ​​and the container number and the hole number are recorded at the same time. Data can be entered through the buttons on the control button area 15.

[0034] Directions:

[0035] 1) Rotate the spent fuel storage and transportation container so that the center of the pre-detection deep hole and the axis of the container are in a horizontal direction.

[0036] 2) Place the travel positioning trolley 1 into the deep hole, and rotate the travel positioning trolley 1 to make the driven wheel and the driving wheel horizontal and vertical.

[0037] 3) Install the positioning seat 9 to the hole mouth so that its central axis is perpendicular to the end face of the deep hole.

[0038] 4) Turn on the laser transmitting and receiving power.

[0039] 5) Control the mobile car to the required position through the display control box 3.

[0040] 6) Align the virtual center crosshairs and concentric circles with the center crosshairs and concentric circles of the laser receiving reflection plate 11 on the display area 13 .

[0041] 7) Move the virtual center crosshairs and concentric circles to align with the center of the laser spot, and rotate the virtual center crosshairs to pass through the center of the center crosshairs.

[0042] 8) Read the distance between the laser spot and the center of the virtual center crosshairs on the concentric circles, read the rotation angle of the center crosshairs, record the distance from the trolley to the end face of the deep hole, and enter the three values ​​and the container number and hole number.

[0043] The above embodiments are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A laser deep hole straightness measuring device, characterized in that: It comprises a walking positioning trolley (1) that can move and position in a deep hole, a laser emitting and receiving device (2) installed at the mouth of the deep hole and capable of emitting and receiving lasers, and a display control box (3); The walking positioning trolley (1) comprises a trolley body (4) and four driving wheels (7) and four driven wheels (8) arranged at both ends of the trolley body (4) and distributed in a cross circle, wherein the driving wheel (7) is arranged as a turbine, and a worm (6) meshing with the four driving wheels (7) and powered by a servo motor (5) is arranged on the central axis of the four driving wheels (7); The laser emitting and receiving device (2) comprises a positioning seat (9) installed at the deep hole and provided with a laser emitter (10) at the center thereof, a laser receiving and reflecting plate (11) installed on the trolley body (4), and a video head (12) capable of capturing an image of the laser receiving and reflecting plate (11) and transmitting the image to a display control box (3); a center cross mark and concentric circles are engraved on the laser receiving and reflecting plate (11), and the center of the center cross mark coincides with the center axes of the four driving wheels (7) and the four driven wheels (8); The servo motor (5), laser transmitter (10) and video head (12) are all connected to the display control box (3).

2. A laser deep hole straightness measuring device according to claim 1, characterized in that: The outer edges of the driving wheel (7) and the driven wheel (8) are both provided with rubber structures for shock absorption.

3. A laser deep hole straightness measuring device according to claim 2, characterized in that: The driven wheel (8) is configured as a turbine.

4. The laser deep hole straightness measuring device according to claim 1, characterized in that: The servo motor (5) is fixed on the trolley body (4), and the motor shaft of the servo motor (5) is sleeved with the worm (6).

5. The laser deep hole straightness measuring device according to claim 1, characterized in that: The laser receiving reflector plate (11) comprises two layers of media, an inner layer and an outer layer; the outer layer of media is a hard plastic that can be penetrated by laser and form a light spot, and has a thickness of 1 mm; the inner layer of media is a polarizing film that can filter out stray light, and a central cross mark and concentric circles are arranged on the polarizing film.

6. The laser deep hole straightness measuring device according to claim 5, characterized in that: The interval between the concentric circles is 0.5 mm.

7. The laser deep hole straightness measuring device according to claim 1, characterized in that: The display control box (3) comprises a power supply and a control panel, wherein the control panel comprises a display area (13) provided with a screen and capable of displaying the position of the light spot, a recording area (14) for recording offset data, and a control button area (15).

8. The laser deep hole straightness measuring device according to claim 7, characterized in that: The screen of the display area (13) has movable and scalable virtual center cross lines and concentric circle lines, and the spacing between the concentric circle lines is 0.5 mm.

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