Pipe datum line surveying device
By designing a pipe baseline surveying device, and utilizing components such as measuring rings, limiting plates, rollers, magnets, and bubble jets, the problem of lack of baselines in the construction of large-diameter riser sections on the outer side plates of marine engineering vessels was solved, achieving high-precision line marking and low-cost construction.
Patent Information
- Application Number
- CN202423139664.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-19
AI Technical Summary
During the construction of large-diameter riser sections on the outer side plating of offshore engineering vessels, the lack of 0°, 90°, 180°, and 270° reference lines makes it difficult to assemble and weld the sections. Existing marking devices are inefficient and costly.
Design a pipe baseline marking device that uses components such as measuring ring, limiting plate, roller, magnet and bubble to accurately draw baselines at 0°, 90°, 180° and 270°, improving the accuracy and efficiency of marking.
It improved the accuracy and efficiency of line marking, reduced the number of people required for line marking, ensured the accuracy of segmented construction, and reduced shipbuilding costs.
Smart Images
Figure CN223636858U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the field of offshore ship design and construction, and particularly relates to a reference line surveying device for a large-diameter riser installed on an offshore ship. BACKGROUND
[0002] A large-diameter riser structure is installed on the side plate of an offshore product ship. During the process of segment construction, the riser needs to be nested into the segment structure and welded with the ship structure to form an integral segment. The riser has an outer diameter of more than 1 meter, a length of about 3-5 meters, and a wall thickness of about 50 mm. When the riser is assembled with the segment, 0°, 90°, 180°, and 270° longitudinal reference lines (elementary lines) need to be drawn on the outer wall of the circular pipe. During the segment assembly, the structure is assembled and welded at the corresponding positions on the outer wall of the circular pipe. However, the 0°, 90°, 180°, and 270° reference lines are not drawn on the pipe during the incoming material stage, and an auxiliary marking device needs to be designed and manufactured to cooperate with the marking to provide the segment part for use during the segment assembly. SUMMARY
[0003] To solve the above problems, the present application provides a pipe reference line surveying device, which adopts the technical scheme of:
[0004] A pipe reference line surveying device has a measuring circular ring, 0°, 45°, 90°, 135°, 180°, 225°, 270°, and 315° scale lines are arranged at equal intervals along the circumference of the surface of the measuring circular ring, limiting plates are arranged at the 0°, 90°, 180°, and 270° scale lines, the limiting plates completely coincide with the 0°, 90°, 180°, and 270° scale lines, a water bubble is arranged near the 0° limiting plate, the water bubble is horizontally placed and perpendicular to the limiting plate, rollers are arranged at 45° and 315°, the rollers are in contact with the outer surface of the steel pipe to be measured, magnets are arranged at 135° and 225°, the magnets are in contact with the outer surface of the steel pipe to be measured, the magnets are fixed at the end of a carbon sleeve, the carbon sleeve is supported by an eye plate, the eye plate is vertically fixed on the surface of the measuring circular ring, the carbon sleeve passes through the eye plate and is fixed by bolts.
[0005] Further, the eye plate has two parts and is bonded to the outer surface of the measuring circular ring by glue.
[0006] Further, the bolts pass through the top of the eye plate and press on the carbon sleeve to fix the carbon sleeve.
[0007] Further, the surface of the measuring circular ring is provided with a rectangular groove, the bottom of the eye plate is inserted into the groove and bonded by glue.
[0008] The present application improves the scribing precision, improves the scribing efficiency, reduces the scribing labor quantity, guarantees the segmented construction precision, and reduces the shipbuilding cost. BRIEF DESCRIPTION OF DRAWINGS
[0009] Figure 1 is a front view structural schematic diagram of a measuring ring;
[0010] Figure 2 is a use schematic diagram of the measuring ring for measuring a steel pipe to be measured;
[0011] Wherein, 1-measuring ring, 2-long bubble, 3-roller, 5-limiting plate, 6-eye plate, 7-carbon tube, 8-hand screw, 9-magnet, 10-steel pipe to be measured, 11-leg, 13-reference line AA'. DETAILED DESCRIPTION
[0012] The present application is further described in combination with the drawings.
[0013] A pipe reference line surveying method, the steel pipe to be measured is placed in a flat state, a measuring ring with scale lines is designed, the measuring ring is sleeved on the steel pipe to be measured, the measuring ring is provided with a roller, a bubble and a movable magnetic attraction point, the 0°, 90°, 180° and 270° reference lines are accurately drawn on the measuring ring plate processed by an engraving machine, the 0°, 90°, 180° and 270° reference line points are drawn on the pipe wall by using a stone pen with the help of the accurate reference lines, the reference line points A corresponding to the 0°, 90°, 180° and 270° positions are drawn on the outer surface of the steel pipe to be measured by using a stone pen, the reference line points A' corresponding to the 0°, 90°, 180° and 270° positions are drawn on the other end of the steel pipe to be measured by using the same method, the 0°, 90°, 180° and 270° reference lines AA' are drawn on the pipe wall by using a chalk line with the reference line points A and A' as the reference points, the printing is made, and the segmented part assembly personnel are provided for positioning construction.
[0014] As shown in Figure 1 , the measuring ring is provided with a ring-shaped main plate, the 0°, 45°, 90°, 135°, 180°, 225°, 270° and 315° central angle reference lines are accurately drawn on the ring-shaped main plate by using an engraving machine or a numerical control machine tool. The rollers are fixed at the 45° and 315° reference lines, the radius of the roller needs to meet the requirement of supporting the ring plate after the roller is installed, so that the ring plate has a uniform gap with the pipe wall.
[0015] The roller is provided with a roller shaft, the roller shaft penetrates through the ring-shaped main plate, the roller is provided with external threads, and is matched with a nut. The threaded end shaft of the roller is screwed to the ring-shaped main plate, the roller is tangent to the outer wall of the steel pipe to be measured, and can roll on the steel pipe to be measured.
[0016] The magnets are fixed at 135° and 225° and are in contact with the outer surface of the steel pipe to be measured, and a rectangular hole is opened on the annular main plate, which is completely perpendicular to the 135° and 225° center angle scale line. The eye plate is inlaid into the rectangular hole and is fixed by using glue. The eye plate has two, and the carbon sleeve passes through the eye plate and is fixed by a bolt. The bolt passes through the top of the eye plate and is on the carbon sleeve to fix the carbon sleeve and avoid the carbon sleeve moving in the eye plate. The magnet is located at the end of the carbon sleeve.
[0017] A long bubble is arranged near the 0° position of the measuring annular ring, which is completely perpendicular to the 0° reference line. The bubble of the measuring annular ring plate is completely centered by rolling the roller.
[0018] Limit plates are arranged at the positions of the 0°, 90°, 180° and 270° scale lines, and the surfaces of the limit plates are completely parallel and coincide with the scale lines.
[0019] The 0°, 90°, 180° and 270° positions are detected respectively, the roller distance is adjusted to the pipe wall by the detection value, the center of the measuring annular ring is coincided with the center of the circular pipe, the magnets at the positions of 135° and 225° of the annular ring are adjusted, the hand screw is loosened, the magnetic cylinder is radially close to the pipe wall along the center line of the cylinder, the hand screw is tightened, the magnets at the positions of 135° and 225° of the annular ring are adsorbed to the pipe wall to form fixed points, the reference line point A corresponding to the 0°, 90°, 180° and 270° positions is drawn on the outer surface of the steel pipe to be measured by using a stone pen, the reference line point A' corresponding to the 0°, 90°, 180° and 270° positions is drawn on the other end of the steel pipe to be measured by using the same method, and the 0°, 90°, 180° and 270° reference line AA' is drawn on the pipe wall by using a powder line and taking the reference line points A and A' as reference points, and the printing is made to provide positioning construction for the segmented assembly personnel.
[0020] The application innovatively and high-precisely realizes the drawing of the 0°, 90°, 180° and 270° reference lines on the circular pipe structure, improves the line drawing precision and efficiency, reduces the number of line drawing personnel, ensures the segmented construction precision and reduces the shipbuilding cost.
Claims
1. A pipe reference line layout device, characterized by, There is a measuring ring, along the surface of the measuring ring circumference, equidistantly arranged with 0°, 45°, 90°, 135°, 180°, 225°, 270°, 315° scale lines, limit plates are arranged at 0°, 90°, 180°, 270° scale lines, the limit plates are completely coincident with 0°, 90°, 180°, 270° scale lines; a water bubble is arranged close to the 0° limit plate, the water bubble is horizontally placed, and is perpendicular to the limit plate; rollers are arranged at 45° and 315°, the rollers are in contact with the outer surface of the steel pipe to be measured, magnets are arranged at 135° and 225°, the magnets are in contact with the outer surface of the steel pipe to be measured, the magnets are fixed at the end of the carbon sleeve, the carbon sleeve is supported by an eye plate, the eye plate is vertically fixed on the surface of the measuring ring, the carbon sleeve passes through the eye plate and is fixed by bolts.
2. A pipe reference line layout device according to claim 1, wherein The eye plate has two, which are bonded to the outer surface of the measuring ring by glue.
3. A pipe reference line layout device according to claim 1, wherein The bolt passes through the top of the eye plate and rests on the carbon sleeve to fix the carbon sleeve.
4. A pipe reference line layout device according to claim 1, wherein The surface of the measuring ring is provided with a rectangular groove, the bottom of the eye plate is inserted into the groove, and the eye plate is bonded by glue.