Pipe unit installation precision detection device and detection method

Abstract

The pipe unit installation precision detection device comprises a detection device and a laser projector, the detection device is provided with a transparent bottom plate, a range finder is fixed on one side of the transparent bottom plate, the other side of the transparent bottom plate is provided with a supporting wall, and the transparent bottom plate and the supporting wall are provided with magnets and can be attracted to a pipe to be detected. The laser projection device is provided with a laser, is fixed at a plate opening during measurement, and is matched with the graduated scale for use, and a magnetic base is fixed at one section of the graduated scale. And measuring the actual values of the central coordinates X, Y and Z of the to-be-measured pipe by using the detection device. Rapid measurement can be achieved, the magnet on the tool assists the tool in fixing and determining the center point, the measurement precision is improved, the measurement precision reaches + / -1 mm, and the measurement precision is improved by more than two times compared with manual ruler measurement. The measurement precision can be kept within + / -1mm regardless of the distance, and the measurement is operated by one person, so that the detection labor cost is reduced. The operation is simple, the complexity of the field measurement process is reduced, and the hoisting efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding and design, and specifically relates to a device and method for detecting the installation accuracy of pipe units. Background Technology

[0002] The installation of piping systems and units during the sectional phase of a ship requires strict precision control and inspection. Typically, the port of the sectional is used as a reference to check the alignment of the pipe and unit flange ports. The distance from the centerline of the piping port to the nearest hull structure in the left-right and up-down directions is also checked. By measuring the deviation between the actual positioning dimensions and the design dimensions, the installation accuracy of the piping system and units is calculated. Any deviations must be corrected. Specific installation standards are as follows: Figure 1 As shown.

[0003] from Figure 1 The marking format indicates the distance from the pipe center to the nearest structural surface of the hull. However, the actual pipe center is difficult to determine precisely. Typically, the pipe's projected center is visually marked on the outer wall of the pipe. Using this projected center as a reference, a ruler is stretched towards the nearest structural surface of the hull to measure the distance from the pipe center to that surface. For example, the width dimension represents the distance in the Y direction; the height represents the distance from the center of the flange end face to the vertical hull structure, such as the distance to the inner or outer bottom plate, and is indicated by the Z value; the distance from the flange end face to the hull section port (theoretically, the flange end face projection and the distance to the front and rear of the section port are the same) is indicated by the X value.

[0004] The conventional method involves measuring the center point of a pipe with a tape measure, then using the center point on the pipe wall as a reference to stretch the tape measure towards the hull structure. Y and Z values ​​are measured in this way. The X value is determined by stretching a line from the inner and outer bottom plate ports as a reference, and observing the distance between the line and the flange end face to judge the deviation between the flange end face and the segment end face. To ensure the accuracy of the above measurement method, improve inspection efficiency, and reduce the complexity of inspection, an electronic precision inspection device is needed to improve the convenience and accuracy of pipe inspection, replacing the tape measure method. Summary of the Invention

[0005] To address the above problems, this invention provides a device and method for detecting the installation accuracy of pipe units, the technical solution of which is as follows: A pipe unit installation accuracy testing device and testing method are disclosed, comprising a testing device and a laser projection device. The testing device includes a rectangular transparent base plate, on which a cross-shaped reference is set. The cross-shaped reference is composed of a transverse reference line and a longitudinal reference line that are perpendicular to each other. Ear plates are set on the extension lines at both ends of the transverse reference line. The ear plates are located on both sides of the transparent base plate, and circular magnets are embedded in the ear plates. The transparent base plate is attracted to the pipe fitting by the circular magnets, and the transparent base plate is tangent to the outer surface of the pipe fitting.

[0006] Side plates are fixed to both sides of the base plate, and a limiting plate is fixed between the two side plates. An adjusting bolt is set in the center of one of the side plates. The bottom edge of the limiting plate is stuck on the horizontal baseline. The side plates and the limiting plate form a groove. A rangefinder is placed in the groove. The adjusting bolt is pressed against the rangefinder body. The root of the rangefinder is placed close to the limiting plate. The root surface of the rangefinder is the measurement zero point.

[0007] The base plate has a long, narrow hole, and the support arm is located inside the hole. One end of the support arm is connected to the transparent base plate shaft through an eye plate. The support wall rotates inside the long, narrow hole. The support wall has an elliptical frame, and a magnet block is slidably connected inside the elliptical frame.

[0008] The laser projection device has a triangular base plate and a vertical plate. Blind holes with magnets embedded in them are located at the three corners of the base plate. Adjustment screws are located next to the blind holes. The laser is rotatably connected to the outer side of the vertical plate via bearings. The laser projection device is used in conjunction with a scale, one end of which is fixed to a magnetic base.

[0009] The actual values ​​of the X, Y, and Z coordinates of the center of the pipe under test are measured using a detection device. The specific operation is as follows: S1: First, measure the width Y value of the tube to be tested.

[0010] First, determine the centerline of the tube to be tested. Place the testing device on the surface of the tube, with the transparent base plate tangent to the tube. Place the bubble on the transparent base plate. Once the bubble on the transparent base plate is centered, move the support arm... When placed on the tube wall, the magnets inside the elliptical frame will attract to the tube wall, forming a fulcrum that supports the transparent base plate and the rangefinder in a horizontal position. At this time, the line connecting the centers of the two circular magnets coincides with the center line on the horizontal projection surface of the tube to be measured.

[0011] By adjusting the bolts, the base of the rangefinder is made to completely coincide with the baseline on the base plate. Then, the rangefinder measurement button is turned on, and the rangefinder projects a laser beam onto the hull structure, which can accurately measure the distance from the center of the tube to the adjacent hull structure, i.e., the width Y value.

[0012] S2: Measure the height Z value of the tube to be tested again.

[0013] Fix the detection device to the side of the pipe with the rangefinder facing downwards. Place a bubble in the rangefinder's limiting plate and measure the height of the pipe from the adjacent horizontal hull structure. When fixing the detection device, observe whether the bubble is centered; a centered bubble indicates the measurement is complete. After firmly attaching the base of the rangefinder to the four-sided support plate, press the measurement button. Project the laser line vertically onto the outer or inner bottom plate of the hull to measure the Z-value of the height from the center of the pipe to the adjacent hull structure.

[0014] S3: Measure the deviation X between the flange end face of the pipe to be tested and the transverse baseline.

[0015] Fix the laser projection device to the plate opening, place a bubble in the base plate, and use the bubble as a reference to check the level of the base plate by adjusting the screws. Fix the scale horizontally to the opening of the pipe to be tested, project the laser onto the opening of the pipe, and use the laser-irradiated scale value as the measured value. Calculate the deviation of the pipe opening in the X direction by comparing the measured value with the design value.

[0016] Furthermore, in the aforementioned pipe unit installation accuracy testing device and method, a sliding cover plate is provided above the groove.

[0017] Furthermore, in the aforementioned tube unit installation accuracy testing device and method, two eye plates are fixed on both sides of one end of the elongated hole, and the frame of the support arm is located between the two eye plates and connected by a shaft.

[0018] Furthermore, in the aforementioned pipe unit installation accuracy testing device and method, there is a gap between the support arm and the limiting plate.

[0019] Furthermore, in the aforementioned pipe unit installation accuracy testing device and method, the side plate, the limiting plate, and the bottom plate are perpendicular to each other.

[0020] Furthermore, in the aforementioned pipe unit installation accuracy detection device and method, the base plate of the laser projection device is fixed on one side of the vertical plate, the laser is fixed on the other side of the vertical plate, and a reinforcing elbow plate is fixed between the vertical plate and the base plate.

[0021] Furthermore, in the aforementioned tube unit installation accuracy detection device and method, a bearing is embedded in the vertical plate, the cylinder is rotatably connected to the vertical plate through the bearing, and the laser is fixed inside the cylinder.

[0022] Furthermore, in the aforementioned tube unit installation accuracy testing device and method, three inner rubber rings are provided between the laser and the cylinder, located at the head, middle and tail of the laser respectively, and the laser is fixed to the cylinder by the inner rubber rings.

[0023] Furthermore, the aforementioned pipe unit installation accuracy testing device and method further incorporates a circular thin steel sheet (approximately 1 mm thick) embedded in the vertical plate surface to provide an attractant for the magnets on the laser fastening device.

[0024] The aforementioned pipe unit installation accuracy testing device and method further includes drilling two blind holes, each with a diameter of 6.2 mm, on the left and right sides of the inner side of the laser fixing cylinder (near the vertical plate). A button magnet with a diameter of 6 mm is nested in each of the two blind holes. The magnets can move radially within the holes. During use, the magnets adhere to the thin steel plate on the vertical plate. The laser fixing device features rotational damping, facilitating stable measurement.

[0025] The aforementioned pipe unit installation accuracy testing device and method further includes drilling round holes on the outside of each blind hole, machining internal threads, and equipping them with hand-tightening screws. The function is to precisely level the base plate and enable it to be in a measuring state.

[0026] The aforementioned pipe unit installation accuracy testing device and method further determine the pipe's deviation in the X direction by measuring the distance from the laser beam to the flange end face.

[0027] The beneficial effects of this invention are: 1. The new fixture allows for rapid measurement. Magnets on the fixture help fix the fixture and determine the center point, improving measurement accuracy to ±1mm, which is more than twice that of manual measuring.

[0028] 2. The new tooling can maintain measurement accuracy within ±1mm regardless of the distance, and only one person is needed to operate the measurement, reducing the labor cost of inspection.

[0029] 3. The new tooling is small in size and easy to operate. It makes full use of electronic detection devices, which simplifies the operation and reduces the complexity of the on-site measurement process.

[0030] 4. The use of new tooling saves measurement and construction time, simplifies the inspection process, improves pipe installation accuracy, and to some extent shortens crane waiting time and improves hoisting efficiency. Attached Figure Description

[0031] Figure 1 It is the existing installation standard for pipe units; Figure 2 This is a schematic diagram of the main structure of the detection device; Figure 3 This is a side view of the detection device. Figure 4 yes Figure 2 Schematic diagram of the structure from the perspective of AA; Figure 5 This is a schematic diagram of the main structure of the laser projection device; Figure 6 This is a top view of the laser projection device. Figure 7 This is a schematic diagram of the laser's rotation direction; Figure 8 This is a schematic diagram of the detection device in use; Figure 9 This is a schematic diagram of the laser projection device in use; Among them, 1-transparent base plate, 2-side plate, 3-limiting plate, 4-ear plate, 5-circular magnet, 6-cover plate, 7-adjusting bolt, 8-bubble, 9-elliptical frame, 10-eye plate, 11-magnet block, 12-rangefinder, 13-tube to be measured, 14-base plate, 15-hull structure, 16-standing plate, 17-magnet, 18-adjusting screw, 19-laser, 20-scale ruler. Detailed Implementation

[0032] The invention will be further described with reference to the accompanying drawings.

[0033] A device and method for detecting the installation accuracy of pipe units are disclosed. During the pipe installation stage, it is necessary to detect the installation accuracy of the pipes. The main focus is on detecting the positional dimensions of the pipes installed on the hull sections relative to the hull structure. Typically, the dimensions of the center point of the pipe opening in the section port area relative to the hull structure in the length (X), width (Y), and height (Z) directions are detected. The installation accuracy of the pipes is determined by detecting the dimensions of the pipe port positions.

[0034] For example, the width (Y) installation accuracy mainly measures the coordinates of the center point of the flange end face of the pipe, which is the distance from the center point of the pipe to the hull structure in the left and right directions. The height (Z) indicates the distance from the center of the pipe to the hull structure in the upper and lower directions. The length (X) installation accuracy mainly measures the distance from the flange end face to the segment port. With the support of the above measurement methods, it is first necessary to accurately determine the center line of the pipe, which can accurately determine the projection center of the pipe in the transverse and planar directions, that is, to accurately detect the measured data of Y / Z.

[0035] It has a detection device and a laser projection device, such as Figures 2-4 As shown, the testing device includes a rectangular transparent base plate with a cross-shaped reference on it. The cross-shaped reference is composed of a horizontal reference line and a vertical reference line that are perpendicular to each other. Ear plates are provided on the extension lines at both ends of the horizontal reference line. The ear plates are located on both sides of the transparent base plate, and circular magnets are embedded in the ear plates. The transparent base plate is attracted to the pipe by the circular magnets, and the transparent base plate is tangent to the outer surface of the pipe.

[0036] Side plates are fixed to both sides of the base plate, and a limiting plate is fixed between the two side plates. An adjusting bolt is set in the center of one of the side plates. The bottom edge of the limiting plate is stuck on the horizontal baseline. The side plates and the limiting plate form a groove. A rangefinder is placed in the groove. The adjusting bolt is pressed against the rangefinder body. The root of the rangefinder is placed close to the limiting plate. The root surface of the rangefinder is the measurement zero point.

[0037] The base plate has a long, narrow hole, and the support arm is located inside the hole. One end of the support arm is connected to the transparent base plate shaft through an eye plate. The support wall rotates inside the long, narrow hole. The support wall has an elliptical frame, and a magnet block is slidably connected inside the elliptical frame.

[0038] like Figures 5-7 As shown, the laser projection device has a triangular base plate and a vertical plate. Blind holes are opened at three corners of the base plate, each containing a magnet. Adjustment screws are located next to the blind holes. The laser is rotatably connected to the outer side of the vertical plate via bearings. The laser projection device is used in conjunction with a scale, one end of which is fixed to a magnetic base.

[0039] The accuracy of pipe installation during the segmented installation phase primarily involves detecting the dimensional values ​​of the pipe's position relative to the hull structure after installation on the hull segment. Typically, this is measured by examining the dimensions of the pipe's center relative to the hull structure in the length (X), width (Y), and height (Z) directions. The installation accuracy is determined by measuring the dimensions of the pipe's port position. For example, width (Y) installation accuracy is primarily measured by examining the coordinates of the center point of the pipe's flange end face, such as the distance from the center point to the left and right sides of the hull structure. Height (Z) indicates the distance from the center point of the pipe's center to the top and bottom of the hull structure. Length (X) installation accuracy is primarily measured by examining the distance from the flange end face to the segment's port. Using the two electronic laser projection methods described above, the actual measured dimensions of the pipe's width, height, and forward / backward directions are detected. Two tooling designs and measurement operation methods enable electronic detection of pipe installation accuracy during the segmented installation phase.

[0040] like Figure 8 , 9 As shown, fix the fixture to the side of the pipe, with the rangefinder facing downwards. Install a bubble on the rangefinder's limiting plate to measure the height from the center of the pipe to the adjacent horizontal hull structure surface. When fixing the measuring fixture, observe whether the bubble on the limiting plate is centered. When the bubble is centered, the measurement state is reached. Install the rangefinder, and after the base of the rangefinder is pressed tightly against the surface of the four-sided support plate, install the measuring button. Project the laser line vertically onto the outer or inner bottom plate of the hull to measure the height from the center of the pipe to the adjacent hull structure.

[0041] After the width and height dimensions of the pipe installation meet the inspection requirements, it is necessary to check the deviation between the pipe flange end face and the transverse baseline, i.e., the X value in the coordinate system. To check the X value of the flange end face, a laser projector is designed and positioned at the plate opening. A laser beam is projected towards the pipe opening using the plate opening as a reference. By measuring the distance from the laser beam to the flange end face, the deviation of the pipe installation accuracy in the X direction is determined. The following describes the design and implementation method of the fixture for precise pipe opening coordinate detection.

[0042] The fixture consists of a base plate, a vertical plate, and a rotating laser projection structure. The base plate and the vertical plate are orthogonal to each other, and a 90-degree reinforcing plate is set between the base plate and the vertical plate to ensure that the angle between the base plate and the vertical plate accurately reaches the 90-degree angle requirement.

[0043] Three blind holes are drilled on the bottom plate. The blind holes are arranged in an equilateral triangle. One blind hole is set on the inner side and two blind holes are set on the outer side (near the section port side). Two magnetic blind holes are set symmetrically along the center. Each blind hole is inlaid with a button magnet for adsorption to the bottom plate of the ship to form a fixed anchor point and form a stable support.

[0044] A round hole is drilled on the outside of each blind hole, with internal threads machined, and a hand-tightening screw is provided. The function is to accurately level the base plate and enable measurement.

[0045] Blind holes are precisely machined on the outer side of the upright plate for mounting bearings. Inside the bearing, a rotating shaft of a laser fastening device is fitted into the bearing's inner hole. The rotating shaft and the fastening device are designed as an integrated unit. The fastening device is a cylindrical structure. Inside the cylinder, a laser projector with its own power supply is fixed. Between the laser projector and the cylinder, three inner rubber rings are set, distributed at the beginning, middle and end of the laser. The laser is fixed inside the cylinder by the nested rubber rings.

[0046] Drill holes on the outer sides of the laser-fixed cylinder at both ends, machine internal threads, and screw in adjusting screws. Fine-tune the laser projection accuracy using these screws, calibrating the projected laser line to be parallel to the ship's reference. Before measurement, place the fixture on the outer or inner bottom plate of the section port. Refer to the bubble on the bottom plate and check for leveling by hand-tightening the screws. Set the laser projection switch at the end of the laser. Turn on the laser projector to project the laser line. Compare the laser line projected onto a ruler with the scale value designed for the fixture to measure the deviation of the pipe flange end face.

[0047] Drill one 6.2mm diameter blind hole on each side of the inner side of the laser fixing cylinder (near the vertical plate). Nest a 6mm diameter button magnet in each of the two blind holes. The magnet can move radially in the hole. When in use, the magnet is attracted to the thin steel plate on the vertical plate. The laser fixing device has rotation damping, which facilitates measurement.

[0048] A thin, circular steel sheet (approximately 1 mm thick) is embedded in the vertical plate to provide an attractant for the magnets on the laser fastening device.

Claims

1. A device and method for detecting the installation accuracy of pipe units, characterized in that, It has a detection device and a laser projector. The detection device includes a rectangular transparent base plate with a cross-shaped reference on it. The cross-shaped reference is composed of a horizontal reference line and a vertical reference line that are perpendicular to each other. Ear plates are set on the extension lines at both ends of the horizontal reference line. The ear plates are located on both sides of the transparent base plate and a circular magnet is embedded in the ear plate. The transparent base plate is attracted to the pipe by the circular magnet and is tangent to the outer surface of the pipe. Side plates are fixed to the two sides of the base plate, and a limiting plate is fixed between the two side plates. An adjusting bolt is set in the center of one of the side plates. The bottom edge of the limiting plate is stuck on the horizontal baseline. The side plates and the limiting plate form a groove. A rangefinder is placed in the groove. The adjusting bolt is pressed against the body of the rangefinder. The root of the rangefinder is placed close to the limiting plate. The root of the rangefinder is the measurement zero point. The base plate has a long strip hole, the support arm is located inside the hole, one end of the support arm is connected to the transparent base plate shaft through an eye plate, the support wall rotates inside the long strip hole, the support wall has an elliptical frame, and a magnet block is slidably connected inside the elliptical frame. The laser projection device has a triangular base plate and a vertical plate. Blind holes are opened at the three corners of the base plate, and magnets are embedded in the blind holes. Adjustment screws are set next to the blind holes. The laser is rotatably connected to the outside of the vertical plate through a bearing. The laser projection device is used in conjunction with a scale, and a magnetic base is fixed to one end of the scale. The actual values ​​of the X, Y, and Z coordinates of the center of the pipe under test are measured using a detection device. The specific operation is as follows: S1: First, measure the width Y value of the tube to be tested; First, determine the centerline of the tube to be tested. Place the testing device on the surface of the tube, with the transparent base plate tangent to the tube. Place the bubble on the transparent base plate. Once the bubble on the transparent base plate is centered, move the support arm... When placed on the tube wall, the magnet inside the elliptical frame will attract the tube wall, forming a fulcrum that supports the transparent base plate and the rangefinder in a horizontal state. At this time, the line connecting the centers of the two circular magnets coincides with the center line on the horizontal projection surface of the tube to be measured. By adjusting the bolts, the base of the rangefinder is made to completely coincide with the baseline on the base plate. Then, the rangefinder measurement button is turned on, and the rangefinder projects a laser onto the hull structure, which can accurately measure the distance from the center of the tube to the adjacent hull structure, i.e., the width Y value. S2: Measure the height Z value of the tube to be tested again; Fix the detection device to the side of the pipe, with the rangefinder facing downwards. Place a bubble on the rangefinder's limiting plate and measure the height of the pipe to be measured from the adjacent horizontal hull structure. When fixing the detection device, observe whether the bubble is centered. The measurement state is reached when the bubble is centered. After the base of the rangefinder is pressed tightly against the surface of the four-sided plate, press the measurement button. Project the laser line vertically onto the outer or inner bottom plate of the hull to measure the height Z value of the pipe's center from the adjacent hull structure. S3: Measure the deviation X between the flange end face of the pipe to be tested and the transverse reference line; Fix the laser projection device to the plate opening, place a bubble on the base plate, and use the bubble as a reference to check the leveling of the base plate by adjusting the screws; fix the scale horizontally to the opening of the tube to be tested, project the laser onto the opening of the tube to be tested, and use the scale value on the scale as the actual value. Calculate the deviation of the tube opening in the X direction by comparing the actual value with the design value.

2. The pipe unit installation accuracy testing device and method according to claim 1, characterized in that, A sliding cover is provided above the groove.

3. The pipe unit installation accuracy testing device and method according to claim 1, characterized in that, Two eye plates are fixed to both sides of one end of the elongated hole, and the frame of the support arm is located between the two eye plates and connected by a shaft.

4. The pipe unit installation accuracy testing device and method according to claim 1, characterized in that, There is a gap between the support arm and the limiting plate.

5. The pipe unit installation accuracy testing device and method according to claim 1, characterized in that, The side panels, limiting plates, and bottom plates are perpendicular to each other.

6. The pipe unit installation accuracy testing device and method according to claim 1, characterized in that, The base plate of the laser projection device is fixed to one side of the upright plate, the laser is fixed to the other side of the upright plate, and a reinforcing elbow plate is fixed between the upright plate and the base plate.

7. A pipe unit installation accuracy testing device and testing method according to claim 1 or 6, characterized in that, Bearings are embedded in the upright plate, and the cylinder is rotatably connected to the upright plate through the bearings. The laser is fixed inside the cylinder.

8. The pipe unit installation accuracy testing device and method according to claim 1, characterized in that, Three inner rubber rings are set between the laser and the cylinder, located at the head, middle and tail of the laser respectively, and the laser is fixed to the cylinder by the inner rubber rings.

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