Method for controlling the installation accuracy of a piping unit

Abstract

The present application relates to the technical field of piping unit precision detection, and discloses a control method for piping unit installation precision, characterized by comprising the following steps: drawing a reference line in a site according to a design drawing; marking X and Y coordinates of each reference pipe according to the reference line, and then installing the reference pipe according to the height coordinates corresponding to the reference pipe; detecting the position of the reference pipe; fixing the reference pipe; installing a connecting pipe connected with the reference pipe according to the position of the reference pipe; and installing the remaining pipes connected with the connecting pipe, and if a pipe is found to be unable to be connected, the pipe is reformed under the condition that the reference pipe and the connecting pipe are not moved. The precision control has high operability, low measurement difficulty, exposes cumulative errors in advance, and improves shipbuilding efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of piping unit precision detection, in particular to a piping unit installation precision control method. BACKGROUND

[0002] At present, in the process of modern shipbuilding, in order to improve the shipbuilding efficiency, the piping unit composed of various pipes, supports, frames, equipment is integrally installed and manufactured, and then hoisted into the ship structure by the lifting equipment, and the connecting pipe on the unit (only the connecting pipe needs to be connected with the pre-installed pipe of the ship structure) is connected with the corresponding pre-installed pipe on the structure. The current unit installation technology takes the upper frame of the unit as the positioning reference, and the positions of the column supports are drawn on the frame, and then all the column supports are welded with the frame. After the frame and the column form an integral whole, the various pipes on the unit are installed. At this time, the construction personnel position the first pipe according to the support, and then connect the subsequent pipes according to the first pipe, until the whole is formed. However, in the prior art, only the precision of the first pipe of the unit installation can be relatively controlled. Since the pipes are also manufactured with precision errors, the single pipe manufacturing precision error is not obvious, but the cumulative error of the pipes connected in sequence will cause the last connected pipe on the unit to be out of tolerance, and finally cannot be connected with the pre-installed pipe on the ship structure. At this time, adjustment will cause low repair efficiency and great difficulty in rectification. When the unit is hoisted into the section, due to the large installation error of the unit connecting pipe, the unit cannot be connected with the pre-installed pipe of the ship structure, resulting in the need to disassemble and rectify the unit and separately reinstall it. However, compared with the unit manufacturing and installation, the disassembled unit needs to be separately installed in the complex environment of the section, and the operation space is narrow. Rectification in the section requires a lot of time, labor and resources. SUMMARY

[0003] The purpose of the present application is to provide a piping unit installation precision control method with high operability and low measurement difficulty, which exposes the cumulative error in advance and improves the shipbuilding efficiency.

[0004] In order to achieve the above purpose, the present application provides a piping unit installation precision control method, characterized in that it comprises the following steps:

[0005] drawing a reference line in the site according to the design drawing;

[0006] marking the X and Y coordinates of each reference pipe according to the reference line, and installing the reference pipe according to the height coordinates corresponding to the reference pipe;

[0007] detecting the position of the reference pipe;

[0008] fixing the reference pipe;

[0009] According to the position of the reference pipe, a connecting pipe connected with the reference pipe is installed;

[0010] The remaining pipes connected with the connecting pipe are installed, and if a pipe is found to be not connected, the pipe is rectified under the condition that the reference pipe and the connecting pipe are not moved.

[0011] Compared with the prior art, the method has the advantages that: in the unit manufacturing and installation stage, the connecting pipe of the unit and the pre-installed pipe of the ship body are simulated. According to the three-dimensional coordinates of the pre-installed pipe of the ship body and the size of the pre-installed pipe connecting end face, the reference pipe is manufactured and installed at the specified position according to the three-dimensional coordinates during the unit piping installation. During the unit manufacturing and installation, the connecting pipe is connected with the reference pipe, so as to control the precision of the unit connecting pipe. The reference line is used as a measurement reference, and is also used as the positioning reference of the reference pipe and each support. The reference line is used throughout the unit manufacturing process, so as to ensure the precision of the reference itself, improve the measurement quality, and reduce the measurement difficulty. After the reference pipe is positioned, the connecting pipe connected with the reference pipe is installed first, so that the connection frame of the unit and the ship body structure is formed. The connection frame is fixed, and then other pipes of the unit are installed according to the connecting pipe. In this way, the overall precision of the unit is successfully ensured. Compared with the prior art in which the upper frame is used as the reference, the method has high operability of precision control and low measurement difficulty through the clear and available reference line. In addition, the precision of the unit connecting pipe and the overall precision of the unit can be well controlled, the cumulative error is exposed in advance, the rectification is performed in advance, the subsequent connection is avoided, the rectification difficulty is reduced, and the shipbuilding efficiency is improved.

[0012] In the method for controlling the installation precision of the piping unit, when the reference line is drawn according to the design drawing in the site, the method further includes the following steps: the reference line is drawn on the plane of the manufacturing site of the piping unit, and a range finder or a total station is used to control the step of drawing the reference line, so that the precision deviation of the reference line is controlled to be within ±1mm.

[0013] In the method for controlling the installation precision of the piping unit, after the reference line is drawn according to the design drawing in the site, the method further includes the following steps: a steel plate is laid on the position of the reference pipe on the reference line, and the steel plate is welded with the ground.

[0014] In the method for controlling the installation precision of the piping unit, after the steel plate is laid, the method further includes the following steps: a marker angle steel is installed at the four corners of the range of the reference line, and a support angle steel is installed on the steel plate at the position of the reference pipe, and the height of the support angle steel is at least 50mm higher than the height of the marker angle steel.

[0015] The pipe system unit installation precision control method of the embodiment of the application further comprises the following steps after the installation of the marker angle steel and the support angle steel: using a laser level to sweep a horizontal line with a height of 100 mm, and marking the corresponding positions of the horizontal line on the marker angle steel and the reference pipe support angle steel.

[0016] The pipe system unit installation precision control method of the embodiment of the application further comprises the following steps when the reference pipe is installed: according to the distance from the reference pipe flange end face to the 100 mm water line on the drawing, cutting the support angle steel and installing the reference pipe flange on the support angle steel to form the reference pipe.

[0017] The pipe system unit installation precision control method of the embodiment of the application, the reference pipe comprises a transverse reference pipe and a longitudinal reference pipe, and the reference pipe flange comprises a transverse reference pipe flange and a longitudinal reference pipe flange.

[0018] The pipe system unit installation precision control method of the embodiment of the application further comprises the following steps when the position of the reference pipe is detected: detecting the reference pipe and the reference line by a total station instrument to determine whether the three-dimensional coordinates of the reference pipe meet the requirements of the drawing.

[0019] The pipe system unit installation precision control method of the embodiment of the application, when the position of the reference pipe is detected, if the detection does not meet the requirements of the drawing, the reference pipe is adjusted according to the measurement data until it reaches a qualified position coinciding with the reference line under the detection of the total station instrument.

[0020] The pipe system unit installation precision control method of the embodiment of the application further comprises the following step when the reference pipe is fixed: installing a diagonal brace at the reference pipe.

[0021] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 FIG. 1 is a schematic diagram of S11 of the pipe system unit installation precision control method of the embodiment of the application;

[0023] Figure 2 FIG. 2 is a schematic diagram of S13 of the pipe system unit installation precision control method of the embodiment of the application;

[0024] Figure 3 FIG. 3 is a schematic diagram of S14 of the pipe system unit installation precision control method of the embodiment of the application;

[0025] Figure 4 FIG. 4 is a schematic diagram of S21 of the pipe system unit installation precision control method of the embodiment of the application;

[0026] In the figure, 1, reference line; 2, reference tube; 21, longitudinal reference tube; 22, transverse reference tube; 3, steel plate; 4, marker angle steel; 5, support angle steel; 6, laser level; 7, reference tube flange; 71, longitudinal reference tube flange; 72, transverse longitudinal reference tube; 8, foot prop. DETAILED DESCRIPTION

[0027] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as a limitation of the present application.

[0028] In the description of the present application, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, only for the purpose of describing the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0029] In the description of the present application, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If it is described as first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of indicated technical features.

[0030] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0031] As shown in the preferred embodiment of the present application, a method for controlling the installation accuracy of a piping unit, characterized in that it comprises the following steps: Figures 1-4

[0032] S1: draw a reference line 1 in the site according to the design drawing;

[0033] S2: mark the X, Y coordinates of each reference tube 2 according to the reference line 1, and then install the reference tube 2 according to the height coordinates of the corresponding reference tube 2;

[0034] S3: detect the position of the reference tube 2;

[0035] S4: fix the reference tube 2; ​

[0036] S5: installing the connecting pipe connected with the reference pipe 2 according to the position of the reference pipe 2;

[0037] S6: installing the remaining pipe fittings connected with the connecting pipe, and if any pipe fitting cannot be connected, the pipe fitting is rectified under the condition that the reference pipe 2 and the connecting pipe are not moved.

[0038] In the unit manufacturing and installation stage, the connecting pipe of the unit and the ship pre-installed pipe connection are simulated, and the position of the ship pre-installed pipe is simulated by the reference pipe 2. According to the three-dimensional coordinates of the ship structure pre-installed pipe and the size of the pre-installed pipe connecting end face, the reference pipe 2 is manufactured and installed at the specified position according to the three-dimensional coordinates during the unit piping installation. During the unit manufacturing and installation, the connecting pipe is connected with the reference pipe 2, so as to control the precision of the unit connecting pipe. The reference line 1 is used as a measurement reference, and is also used as a positioning reference of the reference pipe 2 and each support, and is used throughout the unit manufacturing process, so as to ensure the precision of the reference itself, improve the measurement quality, and reduce the measurement difficulty. After the reference pipe 2 is positioned, the connecting pipe connected with the reference pipe 2 is installed first, so that the connection frame of the unit and the ship structure is formed. The connection frame is fixed, and then other pipes of the unit are installed according to the connecting pipe, so that the overall precision of the unit is successfully ensured. Compared with the previous scheme using the upper frame as the reference, the scheme of the present application has high operability of precision control and low measurement difficulty through the clear and available reference line 1. In addition, the precision of the unit connecting pipe and the overall precision of the unit can be well controlled, the cumulative error is exposed in advance, the rectification is performed in advance, the subsequent connection is avoided, the rectification difficulty is reduced, and the shipbuilding efficiency is improved.

[0039] In some embodiments of the present application, S1: after the reference line 1 is drawn in the site according to the design drawing, the following steps are further included: Figure 1

[0040] S11: the reference line 1 is drawn on the plane of the piping unit manufacturing site, and the step of drawing the reference line 1 is controlled by using a range finder or a total station instrument, so that the precision deviation of the reference line 1 is controlled within ±1mm.

[0041] Through the precision control of the reference line 1, the overall precision of the piping unit is improved, the precision control operability is high, and the measurement difficulty of the range finder or the total station instrument is low, which is convenient to operate.

[0042] In some embodiments of the present application, S1: after the reference line 1 is drawn in the site according to the design drawing, the following steps are further included:

[0043] ​The steel plate 3 is used as a support reference of the reference pipe 2, and the position of the reference pipe 2 on the reference line 1 needs to be aligned, and the steel plate 3 is fixed by welding, so that the steel plate 3 will not be displaced in the subsequent pipe connection process, and the accuracy of the piping unit is maintained.

[0044] As shown in the drawings, Figure 2 In some embodiments of the present application, after the steel plate 3 is laid, the following steps are further included: S13: installing a marker angle steel 4 at the four corners of the range of the reference line 1, and installing a support angle steel 5 on the steel plate 3 at the position of the reference pipe 2, and the height of the support angle steel 5 is at least 50mm higher than the height of the marker angle steel 4.

[0045] The marker angle steel 4 is used to define the overall range of the reference line 1 and set up a marker in height; the support angle steel 5 is used to support the reference pipe 2, and the marker angle steel 4 and the support angle steel 5 need to be arranged vertically to the ground to ensure accuracy in the height direction.

[0046] As shown in the drawings, Figure 3 In some embodiments of the present application, after the marker angle steel 4 and the support angle steel 5 are installed, the following steps are further included: S14: using a laser level 6 to draw a horizontal line of 100mm height, and marking the corresponding positions of the horizontal line on the marker angle steel 4 and the support angle steel 5.

[0047] The horizontal line of 100mm height determines the height position of the reference pipe 2 and the subsequent pipe body, and then the reference pipe 2 is positioned from three directions according to the X, Y coordinate positions within the reference line 1, so that it is installed at the most accurate position. Through the accurate marking of the laser level 6, it can be ensured that the horizontal lines of 100mm height of different marker angle steels 4 and support angle steels 5 are flush.

[0048] As shown in the drawings, Figure 4 In some embodiments of the present application, when the reference pipe 2 is installed, the following steps are further included: S21: according to the distance from the end face of the reference pipe flange 7 to the 100mm water line on the drawing, cutting the support angle steel 5 and installing the reference pipe flange 7 on the support angle steel 5 to form the reference pipe 2.

[0049] During installation, the height of the flange (±1mm), the deviation of the flange bolt hole (±1mm), and the deviation of the flange end face (±1mm) need to be controlled, to further improve the position accuracy of the reference pipe 2.

[0050] In some embodiments of the present application, the reference pipe 2 includes a transverse reference pipe 21 and a longitudinal reference pipe 22, and the reference pipe flange 7 includes a transverse reference pipe flange 71 and a longitudinal reference pipe flange 72, which are used to install connection pipes of different orientations, to ensure the overall accuracy of the piping unit.

[0051] In some embodiments of the present application, in the detection of the position of the reference tube 2, the following step is further included: S31: detecting the reference tube 2 and the reference line 1 by the total station, and judging whether the three-dimensional coordinates of the reference tube 2 can meet the drawing requirements.

[0052] Through re-inspection, whether the installation of the reference tube 2 is in place and accurate is detected, so as to ensure the accuracy of the piping unit.

[0053] In some embodiments of the present application, in the detection of the position of the reference tube 2, if the drawing requirements are not met after detection, the reference tube 2 is adjusted according to the measurement data until it reaches the qualified position coinciding with the reference line 1 under the detection of the total station.

[0054] In some embodiments of the present application, in the fixing of the reference tube 2, the following step is further included: installing the diagonal brace 8 at the reference tube 2 to improve the strength of the reference tube 2 and prevent the reference tube 2 from deviating during subsequent installation, thereby causing the accuracy to deviate.

[0055] In some embodiments of the present application, according to the fixed reference tubes 2, each connecting pipe on the corresponding unit is installed, so that the accuracy of the connecting pipe is accurately controlled. Then, according to each connecting pipe, the pipe fittings in the unit are connected in sequence. If it is found that there is a pipe fitting that cannot be connected, the reference tube 2 and the connecting pipe are not moved, and timely rectification is performed.

[0056] The optimal working process of the present application is as follows:

[0057] S01: drawing the reference line 1 on the plane of the piping unit production site, and controlling the drawing of the reference line 1 by using the range finder or the total station, so that the accuracy deviation of the reference line 1 is controlled within ±1mm;

[0058] S02: marking the X and Y coordinates of each reference tube 2 according to the reference line 1, laying the steel plate 3 at the position where the reference tube 2 needs to be installed on the reference line 1, and welding the steel plate 3 with the ground;

[0059] S03: installing the marker angle steel 4 at the four corners of the range of the reference line 1, and installing the support angle steel 5 on the steel plate 3 at the position of the reference tube 2, the height of the support angle steel 5 being at least 50mm higher than the height of the marker angle steel 4;

[0060] S04: using the laser level 6 to sweep out a 100mm high horizontal line, and marking the corresponding positions of the horizontal line on the marker angle steel 4 and the support angle steel 5;

[0061] S05: cutting the support angle steel 5 according to the distance from the end face of the reference tube flange 7 to the 100mm water line on the drawing, installing the reference tube flange 7 on the support angle steel 5, and installing the diagonal brace 8 at the reference tube 2;

[0062] S06: The reference tube 2 and the reference line 1 are detected by the total station, and it is judged whether the three-dimensional coordinates of the reference tube 2 can meet the drawing requirements. If the detection does not meet the drawing requirements, the reference tube 2 is adjusted according to the measurement data until it reaches the qualified position coinciding with the reference line 1 under the detection of the total station;

[0063] S07: The reference tube 2 is fixed, and the inclined brace 8 is installed at the reference tube 2;

[0064] S08: The connecting tube connected with the reference tube 2 is installed according to the position of the reference tube 2;

[0065] S09: The remaining pipe fittings connected with the connecting tube are installed. If it is found that there are pipe fittings that cannot be connected, the pipe fittings are reformed under the condition that the reference tube 2 and the connecting tube are not moved

[0066] In summary, the embodiment of the present application provides a control method for the installation precision of a pipe system unit, which has high operability of precision control, low measurement difficulty, exposes cumulative errors in advance, reforms in advance, and improves the shipbuilding efficiency.

[0067] The above is only the preferred embodiment of the present application. It should be noted that for ordinary skilled persons in the art, several improvements and replacements can be made without departing from the technical principles of the present application, and these improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. A method of controlling installation accuracy of a piping unit, characterized by, The method comprises the following steps: drawing a reference line according to design drawings in a site; drawing the reference line on a plane of a pipe system unit manufacturing site, and controlling the step of drawing the reference line by using a range finder or a total station instrument, so that the accuracy deviation of the reference line is controlled within ±1mm; marking X and Y coordinates of each reference pipe according to the reference line, and then installing the reference pipe according to a height coordinate corresponding to the reference pipe; laying a steel plate on a position where the reference pipe needs to be installed on the reference line, and welding the steel plate with the ground; installing a marker angle steel at four corners of the range of the reference line, and installing a support angle steel on the steel plate at the position of the reference pipe, the height of the support angle steel being at least 50mm higher than the height of the marker angle steel; scanning a 100mm height horizontal line by using a laser level, and marking the corresponding positions of the horizontal line on the marker angle steel and the support angle steel; cutting the support angle steel according to the distance from the flange end face of the reference pipe to the 100mm water line on the drawings, and installing the reference pipe flange on the support angle steel to form the reference pipe; detecting the position of the reference pipe; detecting the reference pipe and the reference line by using a total station instrument, and judging whether the three-dimensional coordinates of the reference pipe can meet the requirements of the drawings; if the requirements of the drawings are not met after detection, adjusting the reference pipe according to the measurement data until the reference pipe reaches a qualified position coinciding with the reference line under the detection of the total station instrument; fixing the reference pipe; installing an inclined brace at the reference pipe; installing a connecting pipe connected with the reference pipe according to the position of the reference pipe; installing the remaining pipes connected with the connecting pipe, and if there is a pipe that cannot be connected, the pipe is reformed under the condition that the reference pipe and the connecting pipe are not moved.

2. The method of controlling piping unit installation accuracy according to claim 1, characterized by, The reference pipe comprises a transverse reference pipe and a longitudinal reference pipe, and the reference pipe flange comprises a transverse reference pipe flange and a longitudinal reference pipe flange.

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