CN113609605B - A method of assisting long-distance pipeline Jinkou assembly through 3D modeling - Google Patents

Abstract

The invention discloses a method for assisting a gold mouth group pair of a transmission pipeline through three-dimensional modeling, which comprises the following steps: (1) 3D real object scanning of a pipeline to be connected; (2) 3D modeling to generate a short joint to be welded; (3) constructing a reference surface in the middle of the generated short joint to be welded; (4) Measuring the distance between the reference surface and the corresponding point positions of the pipelines at the two sides; (5) Setting out the measured value on the pipe material/inputting the measured value into a numerical control cutting machine; and (6) cutting and blanking by a manual cutting/numerical control cutting machine. According to the method for assisting in the pairing of the gold mouths of the transmission pipelines through three-dimensional modeling, the 3D scanning technology is combined with the modeling technology, so that the accuracy and precision of data are improved, and the construction efficiency is improved; meanwhile, the invention can accurately judge whether the deviation angle of the axis of the pipe section to be connected exceeds the allowable range before the blanking is performed, and the blanking size is accurately calculated by a computer, so that the dependence on the technology and experience of operators is reduced, and the intellectualization and informatization of the blanking are realized.

Description

A method of assisting long-distance pipeline Jinkou assembly through 3D modeling

technical field

The invention relates to the technical field of long-distance pipeline Jinkou grouping, in particular to a method for assisting long-distance pipeline Jinkou grouping through three-dimensional modeling.

Background technique

During the construction or maintenance of long-distance pipelines, it is an essential link to carry out the pairing of pipelines, that is, to connect two sections of pipelines together. Before implementing the closed connection, the steel pipe should be cut and processed according to the actual required short joint length. Due to welding deformation and the influence of various factors, the axes of the joints of the two sections of pipes to be connected are not coincident, but have different degrees of misalignment along the circumferential direction, which requires the cutting machine to cut the steel pipe and process the bevel. At the same time, the steel pipe is obliquely cut to compensate for the misalignment deviation at the connection.

At present, the Jinkou group pairing method in the prior art is the short joint drawing line blanking method. This method does not have professional construction machinery or automated technical processes. It needs to manually measure the size and calculate the intersecting line according to the mathematical formula. Expand the height value, and then draw a line to stake out. When workers draw lines, they usually use a ruler to draw x-axis and y-axis coordinates on wide felt paper. The x-axis is the expanded length of the outer wall of the pipe, and the y-axis is the expanded height of the intersecting line. During the actual implementation, the workers usually only take eight points, connect them after taking the points, and cut out the model with scissors. After the template is ready, spread the linoleum template on the pipe to be cut, make the template fit the outer wall of the pipe as much as possible, draw a white line with a stone pen, and then cut intermittently along the line or along the point with a torch.

Manual line drawing and blanking can easily cause errors to accumulate, resulting in non-concentric horizontal angles, non-horizontal vertical angles or various overlapping angles at the welding joints of the Jinkou group, resulting in welding difficulties or no welding points. This method is very dependent on the technical level and experience of the foreman, and it takes a long time to unload materials on site, which affects the speed of emergency repair and maintenance.

Contents of the invention

The purpose of the present invention is to provide a method for assisting long-distance pipeline chrysoplasty through three-dimensional modeling, which can realize high-precision, high-efficiency, and stylized completion of chrysanthemum assembly, independent of the operator's skills and experience.

The technical solution adopted in the present invention is: a method for assisting long-distance pipeline Jinkou assembly through three-dimensional modeling, comprising the following steps:

(1) Use 3D scanning equipment and software to scan and model the end faces of the pipes to be assembled to obtain circular surfaces D1 and D2;

(2) By modeling software, connect the circle centers O1 and O2 of the circular surfaces D1 and D2 to obtain the line segment O1O2, and the straight line where the line segment 0102 is located is the axis of the pup joint to be assembled;

(3) Take the midpoint O3 of the line segment O1O2, cross the point O3, and make a plane M perpendicular to the line segment O1O2, the plane M is the measurement reference plane; on the measurement reference plane M, take O3 as the center of the circle, and the outer diameter of the pup joint is Diameter draws a circular surface D3;

(4) Take the highest points of the three circles D1, D2, and D3 in the vertical direction as the 12 o'clock direction, and take the farthest endpoints of the three circles in the 3 o'clock direction as D13, D23, and D33; The farthest endpoints in the dot direction are D16, D26 and D36; the farthest endpoints in the 9 o’clock direction of the three circles are D19, D29 and D39; the farthest endpoints in the 12 o’clock direction of the three circles are D112, D212 and D312; the D13, D23, D33, D16, D26, D36, D19, D29, D39, D112, D212 and D312 are measurement reference points;

(5) Connect the measuring datum points, and measure the line segments D13D23, D23D33, D16D26, D26D36, D19D29, D29D39, D112D212 and D212D312, and generate 8 length data in total;

(6) Stake out the measured 8 length data to the pipe section to be cut, and cut it by a CNC cutting machine.

Further, in the step (4), the farthest points in no less than four arbitrary directions on the three circles D1, D2, and D3 are taken as the measurement reference points.

Further, in the step (4), the farthest points in no less than eight arbitrary directions on the three circles D1, D2, and D3 are taken as the measurement reference points.

Further, in the step (4), the farthest points in twelve arbitrary directions of the three circles D1, D2, and D3 are taken as the measurement reference points.

Further, the 3D scanning device is a handheld 3D laser scanner.

A method of assisted long-distance pipeline Jinkou grouping by three-dimensional modeling of the present invention combines 3D scanning technology and modeling technology, improves the accuracy and precision of data, and improves the efficiency of construction; at the same time, the present invention It can accurately judge whether the deviation angle of the axis of the pipe section to be connected exceeds the allowable range before blanking, and the size of the blanking material is accurately calculated by the computer, which reduces the dependence on the technology and experience of the operator, and realizes the intelligence of the blanking and Informatization.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figure 1, a method for assisting long-distance pipeline Jinkou assembly through three-dimensional modeling includes the following steps:

(1) Use 3D scanning equipment and software to scan and model the end faces of the pipes to be assembled to obtain circular surfaces D1 and D2;

(2) By modeling software, connect the circle centers O1 and O2 of the circular surfaces D1 and D2 to obtain the line segment O1O2, and the straight line where the line segment 0102 is located is the axis of the pup joint to be assembled;

(3) Take the midpoint O3 of the line segment O1O2, cross the point O3, and make a plane M perpendicular to the line segment O1O2, the plane M is the measurement reference plane; on the measurement reference plane M, take O3 as the center of the circle, and the outer diameter of the pup joint is Diameter draws a circular surface D3;

(4) Take the highest points of the three circles D1, D2, and D3 in the vertical direction as the 12 o'clock direction, and take the farthest endpoints of the three circles in the 3 o'clock direction as D13, D23, and D33; The farthest endpoints in the dot direction are D16, D26 and D36; the farthest endpoints in the 9 o’clock direction of the three circles are D19, D29 and D39; the farthest endpoints in the 12 o’clock direction of the three circles are D112, D212 and D312; the D13, D23, D33, D16, D26, D36, D19, D29, D39, D112, D212 and D312 are measurement reference points;

(5) Connect the measuring datum points, and measure the line segments D13D23, D23D33, D16D26, D26D36, D19D29, D29D39, D112D212 and D212D312, and generate 8 length data in total;

(6) Stake out the measured 8 length data to the pipe section to be cut, and cut it by a CNC cutting machine.

Claims (5)

1. A method for assisted long-distance pipeline Jinkou grouping by three-dimensional modeling, is characterized in that, comprises the steps: (1) Use 3D scanning equipment and software to scan and model the end faces of the pipes to be assembled to obtain circular surfaces D1 and D2; (2) By modeling software, connect the circle centers O1 and O2 of the circular surfaces D1 and D2 to obtain the line segment O1O2, and the straight line where the line segment 0102 is located is the axis of the pup joint to be assembled; (3) Take the midpoint O3 of the line segment O1O2, cross the point O3, and make a plane M perpendicular to the line segment O1O2, the plane M is the measurement reference plane; on the measurement reference plane M, take O3 as the center of the circle, and the outer diameter of the pup joint is Diameter draws a circular surface D3; (4) Take the highest points of the three circles D1, D2, and D3 in the vertical direction as the 12 o'clock direction, and take the farthest endpoints of the three circles in the 3 o'clock direction as D13, D23, and D33; The farthest endpoints in the dot direction are D16, D26 and D36; the farthest endpoints in the 9 o’clock direction of the three circles are D19, D29 and D39; the farthest endpoints in the 12 o’clock direction of the three circles are D112, D212 and D312; the D13, D23, D33, D16, D26, D36, D19, D29, D39, D112, D212 and D312 are measurement reference points; (5) Connect the measuring datum points, and measure the line segments D13D23, D23D33, D16D26, D26D36, D19D29, D29D39, D112D212 and D212D312, and generate 8 length data in total; (6) Stake out the measured 8 length data to the pipe section to be cut, and cut it by a CNC cutting machine. 2. A method for assisting long-distance pipeline Jinkou assembly by three-dimensional modeling according to claim 1, characterized in that, in said step (4), on three circles of D1, D2, and D3, no less than The farthest point of the four arbitrary directions is the measurement reference point. 3. A method for assisting long-distance pipeline Jinkou grouping by three-dimensional modeling according to claim 2, characterized in that, in the step (4), the three circles of D1, D2, and D3 are not less than The farthest point in eight arbitrary directions is the measurement reference point. 4. A method for assisting long-distance pipeline Jinkou assembly by three-dimensional modeling according to claim 3, characterized in that, in the step (4), twelve arbitrary circles of three circles D1, D2, D3 are taken. The farthest point in the direction is the measurement reference point. 5. A method for assisting long-distance pipeline Jinkou assembly by three-dimensional modeling according to any one of claims 1-4, characterized in that the 3D scanning device is a hand-held three-dimensional laser scanner.