A movable adjusting platform suitable for high-precision laser zenith telescope

Abstract

A kind of movable adjusting platform suitable for high-precision laser zenith telescope, including support, support is fixed on shaft lining;Support is equipped with three-dimensional fine adjustment frame, three-dimensional fine adjustment frame center is equipped with threaded hole, threaded hole is matched with screw rod of total station instrument / prism base;The top of three-dimensional fine adjustment frame is installed zenith telescope laser point target, the center of zenith telescope laser point target is directly opposite with the laser of laser zenith telescope on the top of shaft.The movable adjusting platform suitable for high-precision laser zenith telescope provided by the utility model can realize ultra-high shaft plane control point vertical point precision ≤±2mm, and eliminates equipment docking error.

Description

Technical Field

[0001] This utility model relates to the field of surveying equipment for water conservancy and hydropower engineering, and in particular to a movable adjustable platform suitable for high-precision laser astrolabes, used to solve the problems of insufficient vertical projection accuracy of plane control points in deep vertical shafts and equipment docking errors. Background Technology

[0002] In water conservancy and hydropower projects, the measurement of vertical shafts exceeding 300m in depth is a critical technical aspect. Traditional point-settling methods, using a steel wire with a weighted plumb bob, have the following drawbacks:

[0003] Insufficient accuracy: Affected by airflow and vibration, the error of the projection point is more than ±5mm, which cannot meet the accuracy requirement of ±2mm in the "Specification for Construction Surveying of Water Conservancy and Hydropower Projects" (SL52-2015).

[0004] Outdated fixing method: The bottom of the well needs to be marked manually, and there is an alignment error (≥1mm) when docking with the total station and prism base. The cumulative error affects the breakthrough accuracy.

[0005] Low operational efficiency: It requires waiting for the hammer to stabilize, and a single point throw takes more than 30 minutes, and it is difficult to adapt to complex construction environments.

[0006] While laser nadir instruments can be used for distance measurement, existing fixed platforms lack precise fine-tuning mechanisms, making it impossible to calibrate the laser spot position in real time, resulting in unstable reference for the measurement equipment. Summary of the Invention

[0007] The technical problem to be solved by this utility model is to provide a movable and adjustable platform suitable for high-precision laser nadir instruments, so as to achieve a vertical projection accuracy of ≤±2mm for ultra-high vertical shaft plane control points and eliminate equipment docking errors.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0009] A movable adjustable platform suitable for a high-precision laser nadir includes a support frame fixed to the side wall of a shaft; a three-dimensional fine-tuning frame is installed on the support frame, with a threaded hole at the center of the three-dimensional fine-tuning frame, which matches the screw of the total station / prism base; a laser projection target for the nadir is installed at the top of the three-dimensional fine-tuning frame, and the center of the laser projection target for the nadir is aligned with the laser beam of the laser nadir at the upper end of the shaft.

[0010] The bracket includes a mounting platform, one end of which is hinged to a first mounting seat, and the other end of which is hinged to a telescopic adjustment rod. The other end of the telescopic adjustment rod is hinged to a second mounting seat. Both the first and second mounting seats are fixed to the side wall of the shaft by expansion bolts.

[0011] The telescopic adjustment rod includes a first threaded rod and a second threaded rod, with the threads of the first threaded rod and the second threaded rod having opposite directions. The first threaded rod and the second threaded rod are threadedly connected to a threaded sleeve.

[0012] At least three screws are fixed on the mounting platform, and a base plate is fixed to the bottom of the corresponding three-dimensional fine-tuning frame. The base plate has openings, and the screws pass through the corresponding openings and maintain a gap with the hole wall. Each screw is threaded with a limit nut at the upper and lower ends of the base plate.

[0013] The upper surface of the three-dimensional fine-tuning frame is fitted with a level bubble.

[0014] The bracket is made of aluminum alloy.

[0015] The three-dimensional fine-tuning frame performs fine-tuning in the X, Y, and Z directions, with displacement accuracy in the X and Y directions ≤ 0.02 mm.

[0016] This utility model provides a movable adjustable platform suitable for high-precision laser astrolabes, which has the following technical effects:

[0017] 1) High-precision fine-tuning: Employing a high-precision three-dimensional fine-tuning frame, the minimum adjustment range in the XY direction is 0.01mm, and in the Z direction, it is 0.05mm, with a projection accuracy of ≤±2mm, which is 2.5 times higher than traditional methods.

[0018] 2) Standardized docking: The center of the three-dimensional fine-tuning frame is equipped with an M12 threaded hole, which facilitates the installation of the total station / prism base, is compatible with mainstream surveying equipment, eliminates human centering errors, and improves work efficiency by more than 50%.

[0019] 3) Lightweight structure: The support frame is made of aluminum alloy, which reduces weight by 40% compared to steel platforms while maintaining rigidity, making it suitable for long-term underwater or humid environments. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Figure 1 This is a schematic diagram of the working process of this utility model.

[0022] Figure 2 This is a top view of the three-dimensional fine-tuning frame and the laser projection target of the nadir instrument in this utility model.

[0023] Figure 3 This is a schematic diagram of the installation structure of the three-dimensional fine-tuning frame in this utility model.

[0024] Figure 4 This is a top view of the three-dimensional fine-tuning frame in this utility model.

[0025] Figure 5This is a schematic diagram of the telescopic adjustment rod in this utility model.

[0026] Figure 6 for Figure 3 A magnified view of a portion of point A in the middle.

[0027] In the diagram: 1. Support frame; 2. Three-dimensional fine-tuning frame; 3. Laser projection target for nadir; 4. Shaft sidewall; 5. Screw; 6. Base plate; 7. Limiting nut; 8. Laser nadir. Detailed Implementation

[0028] like Figure 1-4 As shown, a movable adjustable platform suitable for a high-precision laser nadir instrument includes a support 1, which is fixed to the concrete of the shaft sidewall 4 by expansion bolts. A three-dimensional fine-tuning frame 2 is mounted on the support 1. The three-dimensional fine-tuning frame 2 has a threaded hole 2.1 at its center, with a depth of 30mm and an internal thread precision of 6H. This hole precisely matches the M12 screw (precision 6g) of the total station / prism base, resulting in an alignment error ≤0.05mm after screwing. A laser projection target 3 for the nadir instrument is threadedly connected to the top of the three-dimensional fine-tuning frame 2.

[0029] like Figure 3 As shown, the bracket 1 includes a mounting platform 1.1. One end of the mounting platform 1.1 is hinged to the ear plate on the first mounting seat 1.2 via a pin. The first mounting seat 1.2 is fixed to the shaft sidewall 4 via expansion bolts. The other end of the mounting platform 1.1 is hinged to the telescopic adjustment rod 1.3, and the other end of the telescopic adjustment rod 1.3 is hinged to the second mounting seat 1.4. The second mounting seat 1.4 is fixed to the shaft sidewall 4 via expansion bolts.

[0030] like Figure 5 As shown, the telescopic adjusting rod 1.3 includes a first threaded rod 1.3.1 and a second threaded rod 1.3.2, with opposite thread directions. The first threaded rod 1.3.1 and the second threaded rod 1.3.2 are threadedly connected to a threaded sleeve 1.3.3. When the threaded sleeve 1.3.3 is rotated, the first threaded rod 1.3.1 and the second threaded rod 1.3.2 move closer or further apart. This allows adjustment of the length of the telescopic adjusting rod 1.3. By adjusting the length of the telescopic adjusting rod 1.3, the levelness of the mounting platform 1.1 can be adjusted.

[0031] The three-dimensional fine-tuning frame 2 can be a DX1100098 three-dimensional fiber optic adjustment frame manufactured by Futanxi, which can perform fine-tuning in the XYZ directions, ensuring a displacement accuracy of ≤0.02mm in the XY direction and ≤0.05mm in the Z direction. Of course, other precision adjustment structures can also be used, as long as they can guarantee precise fine-tuning in the XYZ directions.

[0032] like Figure 6As shown, four screws 5 are fixed on the mounting platform 1.1, and a base plate 6 is fixed to the bottom of the corresponding three-dimensional fine-tuning frame 2. The base plate 6 has four sets of openings, the diameter of which is approximately 2mm-3mm larger than the diameter of the screws 5. Limiting nuts 7 are threaded onto each screw 5 at positions above and below the base plate 6, providing support and limiting for the base plate 6. Additionally, a level bubble (accuracy ±8″) is embedded on the upper surface of the three-dimensional fine-tuning frame 2.

[0033] When leveling is required, the two limiting nuts 7 at the corresponding screw 5 can be rotated. Adjusting the two limiting nuts 7 upwards raises the base plate 6 at that location; adjusting them downwards lowers the base plate 6. The adjustment range of the limiting nuts 7 is ±3mm. By changing the height of the base plate 6 at that location, and observing the level bubble, it can be checked whether the three-dimensional fine-tuning frame 2 is level, thus ensuring the vertical projection of the laser spot. After adjustment, ensure the levelness error is ≤0.1mm / m.

[0034] Working principle and process:

[0035] 1) Fixing and leveling: After fixing the device to the side wall 4 of the shaft, first make a rough adjustment of the telescopic adjustment rod 1.3; then rotate the limit nut 7 to center the circular level bubble and initially establish a horizontal reference; or use a high-precision level to detect the levelness of the top surface of the three-dimensional fine adjustment frame 2 and adjust it with the help of the limit nut 7 to make the error ≤0.5mm / m.

[0036] 2) Spot Alignment: Adjust the X and Y handwheels on the three-dimensional fine-tuning frame 2 to make the center of the projected spot of the laser nadir 8 coincide with the center of the laser projection target 3 of the nadir. The adjustment accuracy is confirmed by a 0.1mm accuracy scale. In this application, the dimensions of the laser projection target 3 of the nadir and the upper part of the three-dimensional fine-tuning frame 2 are exactly the same, and the center of the laser projection target 3 of the nadir coincides with the central axis of the threaded hole 2.1.

[0037] 3) Measurement Equipment Connection: After determining the point coordinates, remove the laser projection target from the ground plane. Screw the M12 screw from the total station base into the center threaded hole and tighten it clockwise until there is no wobble. The measured centering error is ≤0.05mm, meeting the requirements of the "Engineering Surveying Code" (GB50026-2020). The total station is used for positioning and elevation measurements underground after the point coordinates are determined.

[0038] Actual measurement of projection accuracy

[0039] Test conditions: 350m vertical shaft, ventilation wind speed at the bottom of the shaft 4m / s, concrete vibration operation (vibration frequency 50Hz).

[0040] Data Comparison:

[0041] This device, after 6 consecutive point projections, has a maximum XY deviation of 1.2mm, a minimum of 0.5mm, an average of 0.8mm, and a standard deviation of 0.3mm.

[0042] Traditional method: The deviation of the projection point fluctuates within a range of 4~8mm, and it takes ≥30 minutes to stabilize.

[0043] Conclusion: It meets the standard accuracy requirement of ±2mm, and the anti-interference ability is improved by more than 3 times.

[0044] Efficiency improvement:

[0045] The time required for a single adjustment of the throwing point is 5-10 minutes for this device and 30-60 minutes for the traditional method (including the waiting time for the weight to come to rest).

Claims

1. A movable adjustable platform suitable for high-precision laser astrolabes, characterized in that: Includes a bracket (1), which is fixed on the side wall (4) of the shaft; a three-dimensional fine-tuning frame (2) is installed on the bracket (1), and a threaded hole (2.1) is provided in the center of the three-dimensional fine-tuning frame (2), which matches the screw of the total station / prism base; a nadir laser projection target (3) is installed at the top of the three-dimensional fine-tuning frame (2), and the center of the nadir laser projection target (3) is aligned with the laser of the laser nadir (8) at the top of the shaft.

2. The movable adjustable platform suitable for high-precision laser nadir as described in claim 1, characterized in that: The bracket (1) includes a mounting platform (1.1), one end of which is hinged to a first mounting seat (1.2), the other end of which is hinged to a telescopic adjustment rod (1.3), and the other end of which is hinged to a second mounting seat (1.4); the first mounting seat (1.2) and the second mounting seat (1.4) are both fixed to the side wall (4) of the shaft by expansion bolts.

3. A movable adjustable platform suitable for high-precision laser nadir as described in claim 2, characterized in that: The telescopic adjustment rod (1.3) includes a first threaded rod (1.3.1) and a second threaded rod (1.3.2). The threads of the first threaded rod (1.3.1) and the second threaded rod (1.3.2) have opposite directions. The first threaded rod (1.3.1) and the second threaded rod (1.3.2) are threadedly connected to the threaded sleeve (1.3.3).

4. A movable adjustable platform suitable for high-precision laser nadir instruments according to claim 3, characterized in that: At least three screws (5) are fixed on the mounting platform (1.1). The bottom of the corresponding three-dimensional fine adjustment frame (2) is fixed with a base plate (6). The base plate (6) has an opening. The screws (5) pass through the corresponding opening and maintain a gap with the hole wall. Each screw (5) is threaded with a limit nut (7) at the upper and lower ends of the base plate (6).

5. A movable adjustable platform suitable for high-precision laser nadir instruments according to claim 4, characterized in that: The upper surface of the three-dimensional fine-tuning frame (2) is fitted with a level bubble.

6. A movable adjustable platform suitable for high-precision laser nadir instruments according to claim 5, characterized in that: The bracket (1) is made of aluminum alloy.

7. A movable adjustable platform suitable for high-precision laser nadir as described in claim 6, characterized in that: The three-dimensional fine-tuning frame (2) performs fine-tuning in the X, Y, and Z directions, and the displacement accuracy in the X and Y directions is ≤0.02mm.

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