A coal mine drill rod external thread detection device based on a 2D line laser measuring instrument

Abstract

The utility model discloses a coal mine drill rod external thread detection device based on 2D line laser measuring instrument, mainly by 2D line laser measuring instrument, 2D line laser measuring instrument's posture support, drill rod positioning rotary clamp, rotary servo motor, PLC control system, computer and data processing system composition, through the laser reflection normal line measurement of the multi -point vertical and horizontal two -direction of drill rod external thread, cooperate the rotation of drill rod positioning rotary clamp, realize accurate measurement and three -dimensional profile reconstruction to drill rod external thread parameter, this non - contact type measuring method, high accuracy, easy operation, and reliable data.

Description

Technical Field

[0001] This utility model belongs to the field of precise detection of the external thread size of coal mine drill pipes, and more specifically, it relates to a coal mine drill pipe external thread detection device based on a 2D line laser measuring instrument. Background Technology

[0002] The external thread joint of the drill pipe is the final step in the inspection process after joint processing. During the joint assembly, the compliance of key dimensions has a significant impact on the overall quality and stress distribution of the drill pipe during subsequent use. Traditional measurement methods rely on manual inspection using gauges, which suffers from low accuracy, significant human influence on the results, high labor intensity, and low efficiency. The Xi'an Coal Research Institute, in collaboration with Beijing Arui Xintong Technology Co., Ltd., has developed a method for inspecting the external threads of drill pipes using a high-definition industrial camera. The camera uses backlighting to capture images of the joint, and image processing software is then used to detect and calculate the thread dimensions. However, because this is an image-based inspection method, distortion, pixel count, and image clarity during capture can all affect the inspection results.

[0003] This invention proposes a high-precision, automated, non-contact measurement method based on a 2D line laser measuring instrument. It is simple to operate, has high measurement accuracy, and good stability. Summary of the Invention

[0004] To address the problems existing in image detection, this utility model proposes a coal mine drill rod external thread detection device based on a 2D line laser measuring instrument, which has the advantages of non-contact measurement, high measurement accuracy, and good stability.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a coal mine drill pipe external thread detection device based on a 2D line laser measuring instrument, including a 2D line laser measuring instrument, an attitude adjustment bracket for the 2D line laser measuring instrument, a drill pipe positioning rotary fixture, a rotary servo motor, a PLC control system, a computer and a data processing system.

[0006] Furthermore, the 2D line laser measuring instrument is mounted on the attitude adjustment bracket of the 2D line laser measuring instrument.

[0007] Furthermore, the rotary servo motor is connected to the drill pipe positioning rotary fixture.

[0008] Furthermore, the rotary servo motor is connected to the PLC.

[0009] Furthermore, the 2D line laser measuring instrument is connected to a computer.

[0010] Furthermore, the PLC control system is connected to a computer.

[0011] The coal mine drill rod external thread detection device based on a 2D line laser measuring instrument, which implements this utility model, has the following beneficial effects: High-precision non-contact optical measurement with high accuracy; It is easy to operate and use, and through three-dimensional reconstruction by software, the measurement of the dimensional characteristics of external threads is more accurate and comprehensive. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a coal mine drill rod external thread detection device based on a 2D line laser measuring instrument, according to this utility model. Detailed Implementation

[0013] The technical solution of this utility model will be further explained below with reference to the accompanying drawings.

[0014] A coal mine drill pipe external thread detection device based on a 2D line laser measuring instrument includes a 2D line laser measuring instrument, an attitude adjustment bracket for the 2D line laser measuring instrument, a drill pipe positioning rotary fixture, a rotary servo motor, a PLC control system, a computer, and a data processing system.

[0015] like Figure 1 As shown, the 2D line laser measuring instrument 1 is mounted on the attitude adjustment bracket 4 of the 2D line laser measuring instrument. Depending on the different specifications and dimensions of the drill rod, the attitude adjustment bracket 4 of the 2D line laser measuring instrument can be manually adjusted by the inspection personnel to adjust the detection distance and measurement angle of the external thread of the drill rod as needed.

[0016] The drill pipe 2 is mounted on the drill pipe positioning rotary fixture 3, and the rotary servo motor on the drill pipe positioning rotary fixture 3 drives the drill pipe positioning rotary fixture 3 to rotate.

[0017] The computer and data processing system controls the movement of the rotary servo motor through a PLC control system.

[0018] The computer and data processing system acquires data detected by the 2D line laser measuring instrument 1 and analyzes and processes the data. Since the 2D line laser measuring instrument can measure both horizontal and vertical distances, it can accurately measure... Figure 1 The external thread section of the drill pipe is shown, and the profile of the external thread of the drill pipe is calculated and inverted using a three-dimensional reconstruction method.

[0019] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. A coal mine drill pipe external thread detection device based on a 2D line laser measuring instrument, comprising a 2D line laser measuring instrument, an attitude adjustment bracket for the 2D line laser measuring instrument, a drill pipe positioning rotary fixture, a rotary servo motor, a PLC control system, a computer, and a data processing system.

2. The coal mine drill pipe external thread detection device based on a 2D line laser measuring instrument according to claim 1, characterized in that, The 2D line laser measuring instrument is mounted on the attitude adjustment bracket of the 2D line laser measuring instrument.

3. The coal mine drill pipe external thread detection device based on a 2D line laser measuring instrument according to claim 1, characterized in that, The rotary servo motor is connected to the drill pipe positioning rotary fixture.

4. The coal mine drill pipe external thread detection device based on a 2D line laser measuring instrument according to claim 1, characterized in that, The rotary servo motor is connected to the PLC.

5. A coal mine drill pipe external thread detection device based on a 2D line laser measuring instrument according to claim 1, characterized in that, The 2D line laser measuring instrument is connected to a computer.

6. The coal mine drill pipe external thread detection device based on a 2D line laser measuring instrument according to claim 1, characterized in that, The PLC control system is connected to a computer.

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