Hydraulic pipe mounting method for preventing welding deformation

Abstract

The invention provides a hydraulic pipe mounting method for preventing welding deformation, which comprises the following steps: welding more than three hard pipes into a combined pipe through a welding platform, establishing a coordinate system by taking the axis of a first flange as an original point O and taking the original point O as the original point O; parameters of the hard tube A, the hard tube B and the hard tube C are measured, and the position of a vertical tool used for installing the hard tube A, the positions of the hard tube A and the first flange on the vertical tool, and theoretical coordinate values of an A2 port of the hard tube A and a C2 port of the hard tube C are determined according to the parameters of the hard tube A, the hard tube B and the hard tube C and the connection relation; after the hard tube A and the hard tube B are installed, the port A2 of the hard tube A and the port B2 of the hard tube B are detected through the position detector, the actual coordinate values of the port A2 of the hard tube A and the port B2 of the hard tube B in the coordinate system after installation are determined, the positions of the hard tube A and the hard tube C are adjusted according to the actual coordinate values and the theoretical coordinate values, the coaxiality between the hard tubes is high, and the welding effect is good.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic pipe installation, and particularly relates to a hydraulic pipe installation method for preventing welding deformation. BACKGROUND

[0002] In a ship pipeline system, due to the differences in the direction and length of the hydraulic pipe required by different equipment, the hydraulic pipe often needs to be connected in multiple sections according to the actual working conditions in the field to ensure the complete connection of the hydraulic circuit. The connection part of the hydraulic pipe must have sufficient structural strength and sealing performance, so hard pipe connection is used. To achieve reliable butt joint between hard pipes, during the welding of the combined pipe formed by multiple hard pipes, flanges are precisely welded at both ends of the combined pipe, and the flanges are fastened through the bolt holes of the flanges and the flanges of adjacent pipes to realize the connection of the combined pipe. When multiple hard pipes are welded to form a combined pipe, if the coaxiality deviation between the hard pipes is large, the end face of one hard pipe is difficult to align with the end face of another hard pipe, and the welding seam cannot form a uniform welding fusion zone, resulting in local incomplete penetration at the misaligned part, which damages the strength of the combined pipe. Therefore, when welding the hard pipes, it is necessary to ensure the coaxiality between the hard pipes. In the existing hard pipe welding, only the pressing method of the hard pipe can be used for welding, and if the coaxiality deviation occurs, the hard pipe cannot be adjusted.

[0003] A robot welding tool for hard pipes in a hydraulic pipe system is disclosed in patent document No. 202421193420.1, published on February 18, 2025. The welding tool includes a bottom plate, a mounting box, a first fixing group and a second fixing group. The bottom plate is horizontally arranged. The mounting box is arranged on the bottom plate and has two parallel vertical plates. The first fixing group and the second fixing group each include a limiting piece arranged on the bottom plate, a supporting piece and a pressing piece arranged on the mounting box. The two fixing groups limit and fix the two pipe openings of the hard pipe, and can realize the butt welding of the two ends of the hard pipe and the connecting piece. The welding efficiency of the hard pipe can be greatly improved, the welding quality can be ensured, the size requirements of the product can be guaranteed, the production cost can be reduced, and the tool can be widely used for the processing of different complex hydraulic hard pipe lines.

[0004] The above-mentioned documents state that the notch shape of the first support only fits the lower contour of a rigid pipe of a specific specification, and the notch of the second support only matches specific connectors such as flanges. If a rigid pipe of a different diameter is replaced, the support and limiting components need to be re-processed, making quick adjustment and adaptation impossible. The tooling does not consider the scenario of multi-segment splicing of rigid pipes. The tooling is only for welding the two ends of a single rigid pipe to the connectors. However, marine hydraulic pipes often require multiple rigid pipes to be welded to form a combined pipe. The tooling lacks a positioning structure for continuous splicing of multiple rigid pipes, making it impossible to achieve a reliable coaxial connection of multiple rigid pipe segments. Furthermore, during the welding process, the heat generated by welding can easily lead to unreliable connections at different positions on one end face. If there is a deviation between the welding tooling and the welded pipe body, it will lead to unreliable connections between the pipe bodies. In addition, after welding, the rigid pipe must be removed from the tooling before coaxiality testing can be performed. If a deviation is found during testing, it is difficult to restore the original welding position when re-clamping and positioning, which increases the difficulty of correction. Summary of the Invention

[0005] This invention provides a hydraulic pipe installation method to prevent welding deformation, which involves welding several rigid pipes into a combined pipe with high coaxiality between the rigid pipes and good welding effect.

[0006] To achieve the above objectives, the technical solution of the present invention is: a hydraulic pipe installation method for preventing welding deformation, wherein three or more rigid pipes are welded into a combined pipe using a welding platform, the combined pipe including rigid pipe A, rigid pipe B, and rigid pipe C, a horizontal fixture is provided on the welding platform, and a second flange is provided on the horizontal fixture, the specific steps of which include: S1 establishes a coordinate system with the first flange axis as the origin O. ; S2 measures the parameters of rigid pipes A, B, and C, determines the connection relationship between them, and determines the position of the vertical fixture for installing rigid pipe A, the position of rigid pipe A and the first flange on the vertical fixture, and the theoretical coordinate values ​​of port A2 of rigid pipe A and port C2 of rigid pipe C based on the parameters of rigid pipe A, B, and C and the connection relationship. S3 pre-sets a horizontal fixture and a second flange at the origin O position; and installs a rigid pipe A on the vertical fixture; and installs a vertical fixture at the vertical fixture position of the rigid pipe A. The second flange of S4 is connected to port B1 of the rigid pipe B; S5 A first position detector is installed at port A2 of rigid pipe A, and a second position detector is installed at port B2 of rigid pipe B; the coordinate system is determined based on the first and second position detectors. The actual coordinate values ​​are determined, and the relationship between the actual coordinate values ​​and the theoretical coordinate values ​​is established. S6 adjusts the positions of rigid pipe A and rigid pipe B based on the relationship between the actual coordinate values ​​and the theoretical coordinate values.

[0007] The above settings establish a coordinate system with the axis of the hard pipe A as the origin O , and determine the positions of the vertical tooling and the horizontal tooling in the coordinate system , and the theoretical coordinate values of the A2 port of the hard pipe A and the C2 port of the hard pipe C, then install the horizontal tooling and the second flange at the origin O position, install the hard pipe A and the second flange, install the hard pipe B on the vertical tooling, install the vertical tooling with the hard pipe B on the welding platform, install the position detector at the edge of the hard pipes A and B, determine the actual coordinate values of the A2 port of the hard pipe A and the B2 port of the hard pipe B, and determine whether the positions of the hard pipes A and B need to be adjusted according to the difference between the actual coordinate values and the theoretical coordinate values. Therefore, by comparing the actual values with the theoretical values in the corresponding coordinate system, the accuracy of the positions of the hard pipes A and B after connection is ensured, the A2 port of the hard pipe A and the B2 port of the hard pipe B are accurate, and the subsequent hard pipe C can be accurately connected between the hard pipes A and B, thereby not affecting the subsequent welding and facilitating timely adjustment. The positions of the hard pipes A and B are determined to ensure the coaxiality between the three hard pipes.

[0008] Further, in step S1, the coordinate X axis is established along the length direction of the welding platform with the origin O as the starting point, the coordinate Y axis is established along the width direction of the welding platform with the origin O as the starting point, and the coordinate Z axis is established perpendicular to the coordinate X axis and the coordinate Y axis with the origin O as the starting point. The coordinates of the origin O are .

[0009] The above settings clearly establish the X axis, Y axis and Z axis along the length, width and vertical directions of the welding platform with the origin O as the starting point, thereby providing a reference coordinate system for the actual coordinates of the hard pipes A, B and C on the welding platform.

[0010] Further, in step S2, the diameters of the hard pipes A, B and C are measured as WA, WB and WC, the lengths of the hard pipes A, B and C are measured as LA, LB and LC, the thickness of the second flange is measured as H2, the thicknesses of the vertical base and the vertical plate of the vertical tooling are measured as H3 and H4, the thickness of the horizontal base of the horizontal tooling is measured as H5, the theoretical coordinate value of the A2 port of the hard pipe A in the coordinate system is determined as (- (LC1-WC / 2), 0, LA+H2+H4) according to the length LA of the hard pipe A, the thickness H2 of the second flange, the thickness H4 of the vertical plate of the vertical tooling and the length LC1 of the hard pipe C in the horizontal direction, the position of the hard pipe A on the vertical tooling is LA+H2 away from the vertical base of the vertical tooling, and the theoretical coordinate value of the B2 port of the hard pipe B is (0, 0, H2+LB+H5).

[0011] The above setting establishes the X, Y and Z axis three-dimensional coordinate system with the hard tube A axis as the origin O, and determines the theoretical coordinate value of the B2 port of the hard tube B and the theoretical coordinate value of the A2 port of the hard tube A in the three-dimensional coordinate system, thereby facilitating subsequent comparison.

[0012] Further, in step S3, the welding platform is provided with two or more than two matrix spaced adjustment holes, the horizontal tooling includes a horizontal base, the horizontal base is connected with the adjustment hole through a bolt, the horizontal base is provided with a first assembly hole, the first flange is connected with the second assembly hole through a bolt; the vertical tooling includes a vertical base and a vertical plate, the vertical base is connected with the adjustment hole through a bolt, the vertical plate is fixedly connected with the vertical base, the vertical plate is provided with a second assembly hole, and the second flange is connected with the second assembly hole through a bolt.

[0013] The above setting is provided with a plurality of adjustment holes on the welding platform, the horizontal base is placed first, the placement position of the vertical base is determined through the relationship between the horizontal base and the hard tubes A, B and C, then the horizontal base and the vertical base are connected with the welding platform through bolts respectively, then the first flange is connected with the first assembly hole on the horizontal base through a bolt, and the second flange is connected with the second assembly hole on the vertical plate through a bolt, and the connection of the first flange and the second flange is completed.

[0014] Further, in step S3, the horizontal tooling is installed on the vertical tooling, and the vertical tooling is installed at the position of the hard tube A on the vertical tooling, which includes installing the first flange on the vertical plate of the vertical tooling at a position away from the vertical base by a distance value of LA+H2, then spot welding the A1 port of the hard tube A on the first flange, then placing the vertical base of the vertical tooling on the same horizontal line as the horizontal base and installing it on the welding platform, and then welding the clamping part of the vertical base and the vertical plate.

[0015] The above setting first horizontally welds the A1 port of the hard tube A through the vertical plate of the vertical tooling, and then welds the vertical plate with the hard tube A to the vertical base, so as to avoid the inconvenience caused by horizontal welding of the horizontally arranged hard tube A under the action of horizontal supporting force, thereby ensuring the reliability of welding.

[0016] Further, step S4 includes aligning the axis position of the second flange with the origin O, then fixedly connecting the second flange with the adjustment hole on the welding platform, and then spot welding the B1 port of the hard tube B on the second flange.

[0017] The above setting first aligns the axis position of the second flange with the position of the origin O, and then preliminarily positions the relative positions of the two after spot welding the B1 port of the hard tube B with the second flange, confirms the welding of the two, and the spot welding mode can preliminarily fix the hard tube B or facilitate disassembly when the position is not suitable.

[0018] Further, in step S5, the first position detector obtains three point coordinates A21(X11, Y11, Z11), A22(X12, Y12, Z12), A23(X13, Y13, Z13) of the A2 port of the hard tube A passing through the center of the circle, and then determines the actual coordinate value of the A2 port of the hard tube A according to the radius WA of the A2 port of the hard tube A. Then, the second position detector obtains three point coordinates B21(X21, Y21, Z21), B22(X22, Y22, Z22), B23(X23, Y23, Z23) of the B2 port of the hard tube B passing through the center of the circle, and then determines the actual coordinate value of the B2 port of the hard tube B according to the radius WB of the B2 port of the hard tube B.

[0019] With the above arrangement, the first position detector and the second position detector are used to determine the coordinates of the three points of the A2 port of the hard tube A passing through the center of the circle, and then the coordinates of the center of the circle are obtained according to the three points passing through the center of the circle, that is, the actual coordinate value of the A2 port of the hard tube A. Similarly, the actual coordinate value of the B2 port of the hard tube B is determined, so that the actual coordinate value in the coordinate system can be obtained through actual measurement.

[0020] Further, in step S5, the relationship between the actual coordinate value and the theoretical coordinate value includes: subtracting the actual coordinate value from the theoretical coordinate value to determine the difference value, and then determining the positional relationship between the hard tubes A and B according to the difference value in the three-dimensional coordinate system.

[0021] With the above arrangement, the difference value between the actual coordinate value and the theoretical coordinate value can be directly used to conveniently determine the relationship between the hard tubes A and B, and the judgment is convenient.

[0022] Further, step S6 includes: S61, if the difference values of the actual coordinate value and the theoretical coordinate value in the X-axis direction, the Y-axis direction and the Z-axis direction are all 0, the A2 port of the hard tube A and the B2 port of the hard tube B are matched and arranged, if the difference value of the actual coordinate value and the theoretical coordinate value in the X-axis direction is greater than 0, the actual coordinate value is moved in the X-axis direction by the difference value away from the origin O, if the difference value of the actual coordinate value and the theoretical coordinate value in the Y-axis direction is less than 0, the actual coordinate value is moved in the Y-axis direction by the difference value towards the origin O, if the difference value of the actual coordinate value and the theoretical coordinate value in the Z-axis direction is greater than 0, the actual coordinate value is moved in the Z-axis direction by the difference value towards the origin O; S62, the C2 port and the C1 port of the hard tube C are connected between the A2 port of the hard tube A and the B2 port of the hard tube B, the A2 port of the hard tube A and the C2 port of the hard tube C, the B2 port of the hard tube B and the C1 port of the hard tube C are first spot-welded and connected, and full welding is performed at the A1 port of the hard tube A and the B2 port of the hard tube B.

[0023] The above setting, only when the A2 port of the hard pipe A and the C2 port of the hard pipe C have a difference of 0 in the X axis, Y axis and Z axis direction, then the hard pipe A and B can be matched, and then the hard pipe C is installed between the hard pipe A and B, otherwise, since the A2 port of the hard pipe A is located in the negative direction of the X axis, and the actual coordinate value is greater than the theoretical coordinate value in the X axis direction, then the difference is moved to the negative direction of the X axis, and then the actual value is adjusted to the theoretical value, so that the reliability of the hard pipe connection after installation can be ensured.

[0024] Further, after the step S62, the step S63 is further included, when the hard pipe A and the hard pipe C are adjusted, a welding fixing clamp is arranged at the middle part of the hard pipe A to fix the position of the hard pipe A.

[0025] The above setting, the bottom of the welding fixing clamp is arranged on the welding platform through a bolt, and the welding fixing clamp is provided with a groove matched with the hard pipe A at the height of the hard pipe A, so that the hard pipe A can pass through the groove, without damaging the surface of the hard pipe A, and stable support is provided from the middle part of the hard pipe A, so that the hard pipe A can always be kept on the adjusted accurate coordinate. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Structure diagram of the present application Figure 1 .

[0027] Figure 2 Structure diagram of the present application Figure 2 .

[0028] Figure 3 Partial structure diagram of the pressure plate and the gasket in the present application.

[0029] Figure 4 Position relationship diagram of the present application in the coordinate system.

[0030] Figure 5 Layout diagram of three points detected by the position detector on the hard pipe A in the present application.

[0031] Brief description of the drawings: 1-welding platform; 11-adjusting hole; 2-horizontal tooling; 21-horizontal base; 3-vertical tooling; 31-vertical base; 32-vertical plate; 33-gasket; 34-pressure plate; 4-first flange; 5-second flange; 6-welding fixing clamp. DETAILED DESCRIPTION

[0032] As Figures 1-5As shown, a hydraulic pipe installation method for preventing welding deformation, a plurality of hard pipes are welded into a combined pipe through a welding platform 1, in this embodiment, the combined pipe includes hard pipe A, hard pipe B and hard pipe C, and the hard pipe C is a U-shaped pipe, the hard pipe A is horizontally arranged, the hard pipe B is vertically arranged, and the hard pipe A is located on the left side of the hard pipe B, the welding platform 1 is provided with a horizontal tooling 2 and a vertical tooling 3, the second flange 5 is arranged on the horizontal tooling 2, and the first flange 4 is arranged on the vertical tooling 3, and the specific steps include: S1 establish a coordinate system with the first flange 4 as the origin O ; S2 measure the specific parameters of hard pipe A, hard pipe B and hard pipe C, determine the connection relationship among them, and determine the vertical tooling position for installing hard pipe A, the position of hard pipe A and the first flange on the vertical tooling, and the theoretical coordinate values of the A2 port of hard pipe A and the C2 port of hard pipe C according to the parameters and connection relationship of hard pipe A, hard pipe B and hard pipe C; S3 preset the horizontal tooling and the second flange at the origin O position; and install hard pipe A on the vertical tooling; install the vertical tooling at the vertical tooling position of hard pipe A; S4 the second flange 4 is connected with the B1 port of hard pipe B, and the B2 port of hard pipe B is connected with the C1 port of hard pipe C; S5 the first position detector is arranged on the A2 port of hard pipe A, and the second position detector is arranged on the C2 port of hard pipe C; according to the first position detector and the second position detector, the actual coordinate values of the A2 port of hard pipe A and the C2 port of hard pipe C after installation in the coordinate system are determined, and the relationship between the actual coordinate values and the theoretical coordinate values is determined; S7 adjust the positions of hard pipe A and hard pipe C according to the relationship between the actual coordinate values and the theoretical coordinate values.

[0033] In step S1, the coordinate X axis is established along the length direction of the welding platform 1 with the origin O, the coordinate Y axis is established along the width direction of the welding platform 1 with the origin O, and the coordinate Z axis is established perpendicular to the coordinate X axis and the coordinate Y axis with the origin O, the coordinate of the origin O is , which clearly establishes the X axis, the Y axis and the Z axis along the length, the width and the vertical direction of the welding platform 1, respectively, to provide a reference coordinate system for the actual coordinates of hard pipe A, hard pipe B and hard pipe C on the welding platform 1.

[0034] In this embodiment, hard pipe A is located on the left side of hard pipe B, that is, on the negative direction of the X axis of the coordinate system. In step S2, the diameters of hard pipe A, hard pipe B and hard pipe C are measured as WA, WB and WC respectively, the lengths of hard pipe A, hard pipe B and hard pipe C are measured as LA, LB and LC respectively, the thickness of the second flange is measured as H2, the thicknesses of the vertical base and the vertical plate of the vertical tooling are measured as H3 and H4 respectively, the thickness of the horizontal base of the horizontal tooling is measured as H5, and the theoretical coordinate value of the A2 port of hard pipe A in the coordinate system is determined as (- (LC1-WC / 2), 0, LA+H2) according to the length LA of hard pipe A, the thickness H2 of the second flange, the thickness H4 of the vertical plate of the vertical tooling and the length LC1 of hard pipe C in the horizontal direction. The position of hard pipe A on the vertical tooling is LA+H2 away from the vertical base of the vertical tooling, and the theoretical coordinate value of the B2 port of hard pipe B is (0, 0, H2+LB+H5).

[0035] In step S3, the welding platform 1 is provided with two or more than two adjustment holes 11 arranged in a matrix. In this embodiment, the distance between adjacent adjustment holes 11 is the same. The horizontal tooling 2 includes a horizontal base 21, the horizontal base 21 is connected to the adjustment hole 11 through a bolt, the horizontal base 21 is provided with a first assembly hole, and the first flange 4 is connected to the second assembly hole through a bolt. The vertical tooling 3 includes a vertical base 31 and a vertical plate 32, the vertical base 31 is connected to the adjustment hole 11 through a bolt, and the vertical plate 32 is fixedly connected to the vertical base 31. The vertical plate 32 is provided with a second assembly hole, and the second flange 5 is connected to the second assembly hole through a bolt. A plurality of adjustment holes 11 are arranged on the welding platform 1. First, the horizontal base 21 is placed, and then the placement position of the vertical base 31 is determined according to the relationship between the horizontal base 21 and hard pipes A, B and C. Then, the horizontal base 21 and the vertical base 31 are connected to the welding platform 1 through bolts respectively. Then, the first flange 4 is connected to the first assembly hole on the horizontal base 21 through a bolt, and the second flange 5 is connected to the second assembly hole on the vertical plate 32 through a bolt, thereby completing the connection of the first flange 4 and the second flange 5.

[0036] In step S3, the welding platform 1 is provided with two or more than two adjustment holes 11 arranged in a matrix. In this embodiment, the distance between adjacent adjustment holes 11 is the same. The horizontal tooling 2 includes a horizontal base 21, the horizontal base 21 is connected to the adjustment hole 11 through a bolt, the horizontal base 21 is provided with a first assembly hole, and the first flange 4 is connected to the second assembly hole through a bolt. The vertical tooling 3 includes a vertical base 31 and a vertical plate 32, the vertical base 31 is connected to the adjustment hole 11 through a bolt, and the vertical plate 32 is fixedly connected to the vertical base 31. The vertical plate 32 is provided with a second assembly hole, and the second flange 5 is connected to the second assembly hole through a bolt. A plurality of adjustment holes 11 are arranged on the welding platform 1. First, the horizontal base 21 is placed, and then the placement position of the vertical base 31 is determined according to the relationship between the horizontal base 21 and hard pipes A, B and C. Then, the horizontal base 21 and the vertical base 31 are connected to the welding platform 1 through bolts respectively. Then, the first flange 4 is connected to the first assembly hole on the horizontal base 21 through a bolt, and the second flange 5 is connected to the second assembly hole on the vertical plate 32 through a bolt, thereby completing the connection of the first flange 4 and the second flange 5.

[0037] Step S4 includes aligning the axis position of the second flange 5 with the origin O, then fixedly connecting the second flange 5 with the adjusting hole on the welding platform 1, and then spot welding B1 port of the hard tube B on the second flange 5.

[0038] In step S5, the first position detector obtains three point coordinates A21 (X11, Y11, Z11), A22 (X12, Y12, Z12), A23 (X13, Y13, Z13) on the hard tube A2 port, then determines the actual coordinate value of the hard tube A2 port according to the radius WA of the hard tube A2 port, and then the second position detector obtains three point coordinates B21 (X21, Y21, Z21), B22 (X22, Y22, Z22), B23 (X23, Y23, Z23) on the hard tube B2 port, then determines the actual coordinate value of the hard tube B2 port according to the radius WB of the hard tube B2 port.

[0039] In this embodiment, the first position detector and the second position detector can be a three-coordinate measuring machine (CMM), by contacting the mechanical side head with three points on the circumference of the hard tube A2 port, so that the center of the machine is located at the origin position, and the three-dimensional coordinate values of the corresponding three points on the circumference can be obtained, and the working principle of the three-coordinate measuring machine is a prior art and will not be repeated here, such as Figure 5 As shown in the figure, the three point coordinate values on the circumference can also be measured by other three-dimensional coordinate measuring devices, after measuring the three point coordinates A21 (X11, Y11, Z11), A22 (X12, Y12, Z12), A23 (X13, Y13, Z13), assuming that the center coordinate of the hard tube A2 port is required to be (XO1, YO1, ZO1), then the center coordinate O1 value can be obtained according to the following relationship: (X11- XO1) 2 + (Y11- YO1) 2 + (Z11- ZO1) 2 = (2*WA) 2 ; (X12- XO1) 2 + (Y12- YO1) 2 + (Z12- ZO1) 2 = (2*WA) 2 ; (X13- XO1) 2 + (Y13- YO1) 2 + (Z13- ZO1) 2 = (2*WA) 2 .

[0040] Step S6 includes: S61, if the actual coordinate value and the theoretical coordinate value in the X-axis direction, Y-axis direction and Z-axis direction are all 0, the A2 port of the hard pipe A and the B2 port of the hard pipe B are matched and set, if the actual coordinate value and the theoretical coordinate value in the X-axis direction are greater than 0, the actual coordinate value in the X-axis direction is moved to the direction away from the origin O by the difference value, if the actual coordinate value and the theoretical coordinate value in the Y-axis direction are less than 0, the actual coordinate value in the Y-axis direction is moved to the direction close to the origin O by the difference value, if the actual coordinate value and the theoretical coordinate value in the Z-axis direction are greater than 0, the actual coordinate value in the Z-axis direction is moved to the direction close to the origin O by the difference value, if the actual coordinate value and the theoretical coordinate value in the Z-axis direction are less than 0, the actual coordinate value in the Z-axis direction is moved to the direction away from the origin O by the difference value.

[0041] For example, if the difference value is 3cm, for the hard pipe A, a gasket 33 with a thickness of 3cm can be added below the vertical base 31 of the vertical tooling, and then the vertical base 31 and the gasket 33 are fixed to realize the height adjustment in the Z-axis direction, in order to further increase the reliability of the column tooling fixation, a column pressing plate 34 can be arranged above the column base to press the column base 31, and for the hard pipe A, if the actual coordinate value in the Z-axis direction is -3cm, the first flange 4 and the spot welding position of the vertical plate 32 need to be disassembled, then the second flange 4 is moved 3cm to the direction of the vertical base 31, then the first flange 4 and the vertical plate 32 are spot welded again, and then the position detection is performed again through step S5.

[0042] For the hard pipe B, if the difference value is 3cm, a gasket with a thickness of 3cm can also be added below the horizontal base 31 of the horizontal tooling, and then the horizontal base 21 and the gasket are fixed to realize the height adjustment in the Z-axis direction, if the actual coordinate value in the Z-axis direction is -3cm, the second flange 5 and the spot welding position of the horizontal base 21 need to be disassembled, and then the second flange 5 is replaced to realize distance adjustment, and for the position adjustment in the Y-axis direction, the second flange 5 can be connected to different adjusting holes on the welding platform 1 to realize adjustment.

[0043] S62: the C2 port and the C1 port of the hard pipe C are connected between the A2 port of the hard pipe A and the B2 port of the hard pipe B, the A2 port of the hard pipe A and the C2 port of the hard pipe C, the B2 port of the hard pipe B and the C1 port of the hard pipe C are first spot welded and connected, full welding is performed at the A1 port of the hard pipe A, and full welding is performed at the B2 port of the hard pipe B. S63: when the positions of the hard pipe A and the hard pipe C are adjusted, a welding fixing clamp 6 is arranged at the middle part of the hard pipe A to fix the position of the hard pipe A.

[0044] The working principle of the application: a coordinate system is established with the axis of the hard pipe A as the origin O Then, combining the connection relationships and specific parameters of rigid pipes A, B, and C, the coordinate system is determined. The positions of the vertical and horizontal fixtures are determined, along with the theoretical coordinates of the A2 port of rigid pipe A and the C2 port of rigid pipe C. First, the horizontal fixture and the second flange are set at the origin O, and then the second flange and rigid pipe A are installed. Next, rigid pipe B is installed on the vertical fixture, and then the vertical fixture with rigid pipe B is installed on the welding platform. Position detectors are then installed at the edges of rigid pipes A and B to determine the actual coordinates of the A2 port of rigid pipe A and the B2 port of rigid pipe B. The difference between the actual and theoretical coordinates determines whether the positions of rigid pipes A and B need adjustment. Therefore, by comparing the actual and theoretical values ​​in the corresponding coordinate system, the accuracy of the positions of rigid pipes A and B after actual connection is ensured, making the A2 port of rigid pipe A and the B2 port of rigid pipe B accurate. This ensures that the subsequent rigid pipe C can be accurately connected between rigid pipes A and B, thus not affecting subsequent welding and allowing for convenient and timely adjustments. The position of rigid pipe C is determined by the positions of rigid pipes A and B, ensuring good coaxiality among the three rigid pipes.

Claims

1. A hydraulic pipe installation method for preventing welding distortion, in which three or more hard pipes are welded into a combined pipe by a welding platform, characterized by: The combined pipe comprises hard pipes A, B and C, the welding platform is provided with a horizontal tooling, and a second flange is arranged on the horizontal tooling, and the specific steps comprise: S1 establishes the hard tube A axis as the origin O, and establishes the coordinate system at the origin O ; S2, parameters of the hard pipes A, B and C are measured, a connection relationship among the three is determined, and a vertical tooling position for installing the hard pipe A, positions of the hard pipe A and the first flange on the vertical tooling, and theoretical coordinate values of an A2 port of the hard pipe A and a B2 port of the hard pipe B are determined according to the parameters and the connection relationship of the hard pipes A, B and C; S3, the horizontal tooling and the second flange are preset at the original point O position, the hard pipe A is installed on the vertical tooling, and the vertical tooling is installed at the vertical tooling position of the hard pipe A; S4, the second flange is connected with the B1 port of the hard pipe B; S5 is provided with a first position detector on the A2 port of the hard tube A, and a second position detector on the B2 port of the hard tube B; according to the first position detector and the second position detector, the actual coordinate values of the A2 port of the hard tube A and the C2 port of the hard tube C in the coordinate system after installation are determined, and the relationship between the actual coordinate values and the theoretical coordinate values is determined; ​ S6, positions of the hard pipes A and B are adjusted according to a relationship between actual coordinate values and the theoretical coordinate values.

2. The hydraulic pipe installation method for preventing welding deformation according to claim 1, characterized by: In step S1, a coordinate X-axis is established along the length direction of the welding platform with the origin O, a coordinate Y-axis is established along the width direction of the welding platform with the origin O, and a coordinate Z-axis is established perpendicular to the coordinate X-axis and the coordinate Y-axis with the origin O. The coordinates of the origin O are .

3. The method of claim 1, wherein: In step S2, diameters of the hard pipes A, B and C are measured as WA, WB and WC respectively, lengths of the hard pipes A, B and C are measured as LA, LB and LC respectively, a thickness of the second flange is measured as H2, thicknesses of a vertical base and a vertical plate of the vertical tooling are measured as H3 and H4 respectively, a thickness of a horizontal base of the horizontal tooling is measured as H5, and theoretical coordinate values of the A2 port of the hard pipe A in a coordinate system are determined as (- (LC1-WC / 2), 0, LA+H2+H4) according to the length LA of the hard pipe A, the thickness H2 of the second flange, the thickness H4 of the vertical plate of the vertical tooling and a length LC1 of the hard pipe C in a horizontal direction, the hard pipe A is positioned at a distance of LA+H2 from the vertical base of the vertical tooling, and theoretical coordinate values of the B2 port of the hard pipe B are (0, 0, H2+LB+H5).

4. The method of claim 1, wherein: In step S3, the welding platform is provided with two or more than two matrix-spaced adjusting holes, the horizontal tooling comprises a horizontal base, the horizontal base is connected with the adjusting holes through bolts, the horizontal base is provided with a first assembly hole, the first flange is connected with the second assembly hole through bolts, the vertical tooling comprises a vertical base and a vertical plate, the vertical base is connected with the adjusting holes through bolts, the vertical plate is fixedly connected with the vertical base, the vertical plate is provided with a second assembly hole, and the second flange is connected with the second assembly hole through bolts.

5. The method of claim 1, wherein: In step S3, the hard pipe A is installed on the vertical tooling, and the vertical tooling is installed at the vertical tooling position of the hard pipe A, which comprises installing the first flange on the vertical plate of the vertical tooling at a position with a distance value of LA+H2 from the vertical base, then spot welding the A1 port of the hard pipe A on the first flange, then arranging the vertical base of the vertical tooling and the horizontal base on the same horizontal line and installing the vertical tooling on the welding platform, and then welding the clamping joint of the vertical base and the vertical plate.

6. The method of claim 1, wherein: In step S4, the axis position of the second flange is aligned with the original point O, then the second flange is fixedly connected with the adjusting hole on the welding platform, and then the B1 port of the hard pipe B is spot welded on the second flange.

7. The method of claim 1, wherein: In step S5, the first position detector obtains three point coordinates A21 (X11, Y11, Z11), A22 (X12, Y12, Z12), and A23 (X13, Y13, Z13) of the A2 port of the hard tube A passing through the center of the circle, and then determines the actual coordinate value of the A2 port of the hard tube A according to the radius WA of the A2 port of the hard tube A. Then, the second position detector obtains three point coordinates B21 (X21, Y21, Z21), B22 (X22, Y22, Z22), and B23 (X23, Y23, Z23) of the B2 port of the hard tube B passing through the center of the circle, and then determines the actual coordinate value of the B2 port of the hard tube B according to the radius WB of the B2 port of the hard tube B.

8. The method of claim 7, wherein: In step S5, determining the relationship between the actual coordinate value and the theoretical coordinate value includes: subtracting the actual coordinate value from the theoretical coordinate value to determine a difference value, and then determining the positional relationship between the hard tubes A and B according to the difference value in the three-dimensional coordinate system.

9. The method of claim 1, wherein: Step S6 includes: S61, if the actual coordinate value and the theoretical coordinate value have a difference value of 0 in the X-axis direction, the Y-axis direction, and the Z-axis direction, the A2 port of the hard tube A and the B2 port of the hard tube B are matched and arranged, if the actual coordinate value and the theoretical coordinate value have a difference value greater than 0 in the X-axis direction, the actual coordinate value is moved in the X-axis direction away from the origin O by the difference value, if the actual coordinate value and the theoretical coordinate value have a difference value less than 0 in the Y-axis direction, the actual coordinate value is moved in the Y-axis direction towards the origin O by the difference value, and if the actual coordinate value and the theoretical coordinate value have a difference value greater than 0 in the Z-axis direction, the actual coordinate value is moved in the Z-axis direction towards the origin O by the difference value; S62, connecting the C2 port and the C1 port of the hard tube C between the A2 port of the hard tube A and the B2 port of the hard tube B, and spot welding the A2 port of the hard tube A and the C2 port of the hard tube C, the B2 port of the hard tube B and the C1 port of the hard tube C, and then fully welding the A1 port of the hard tube A and the B2 port of the hard tube B.

10. The method of claim 9, wherein: After step S62, step S63 is further included, when the hard tube A and the hard tube C are adjusted to the correct position, a welding fixing clamp can be arranged at the middle part of the hard tube A to fix the position of the hard tube A.

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