A laser pointing device for rapid centering of PCCP pipe

Abstract

A kind of laser pointing device for PCCP pipe inner quick division, including ruler body, ruler body includes rectangular frame and back plate installed in the back of rectangular frame, and cover plate installed in the front of rectangular frame;The upper center position of rectangular frame is installed with pipe leveler;The center axis of laser pointing device is coaxial with the center line of pipe leveler, and laser pointing device is fixedly installed in the lower aspect plate center of rectangular frame;Power supply box is fixedly installed on the back plate at the right side panel of the inside of rectangular frame, and power supply switch that projects the right side panel of rectangular frame is arranged on the right side of power supply box, and laser pointing device is electrically connected with power supply box;The present application has the advantages of simple structure, convenient operation, can quickly place ruler body in the inner port of PCCP pipe, and adjust to horizontal state, open power switch, the laser beam emitted by laser emitter can quickly determine the center line of pipe, so that the precision of subsequent measurement is significantly improved, effectively reduces the pipe installation error, improves the pipe installation quality.

Description

Technical Field

[0001] This invention relates to the field of pipeline construction measurement tools, and in particular to a laser positioning device for rapid centering inside PCCP pipes. Background Technology

[0002] In construction, water conservancy, manufacturing, and other related fields, PCCP pipes are widely used in long-distance water transmission lines and urban water supply projects due to their advantages such as high resistance to internal and external pressure, good joint sealing, and strong seismic resistance. During the construction and installation of PCCP pipes, accurately determining the pipe centerline is a crucial step in ensuring installation quality. The accuracy of this measurement not only directly affects the accuracy of the pipe installation but also plays a decisive role in the safety and stability of the project's later operation.

[0003] Traditional methods for determining the centerline of PCCP pipes have several drawbacks. Existing technologies typically involve embedding a long angle iron within the pipe cavity, marking the geometric center of the angle iron, using a spirit level for multi-dimensional leveling, and finally employing a plumb bob to locate the pipe centerline. This approach suffers from three major technical defects: First, the geometric dimensions of the long angle iron necessitate repeated calibrations during leveling, significantly increasing construction time and manpower costs. Second, the measurement process is susceptible to interference from human factors such as operator experience and ambient lighting, easily leading to systematic measurement deviations and failing to meet the demands of high-precision engineering. Third, in large-scale linear projects, facing applications with a massive number of pipes, this method suffers from significant efficiency bottlenecks, failing to meet the stringent construction schedule requirements of modern engineering projects and severely restricting the construction cycle. Therefore, a device is needed that can quickly and accurately center PCCP pipes. This device is easy to operate, offers high measurement accuracy, and can quickly and accurately determine the centerline of the PCCP pipe, providing an accurate benchmark for subsequent construction. This method mainly utilizes the characteristics of laser's directional emission, high brightness, and good directionality. By measuring the intersection point of the laser beam and the inner wall of the PCCP tube, the center point of the PCCP tube can be determined. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a laser positioning device for rapid centering inside a PCCP pipe, comprising a ruler body, the ruler body comprising a rectangular frame and a back plate installed on the back of the rectangular frame, and a cover plate (13) installed on the front of the rectangular frame (11); a pipe level (2) is installed at the upper center of the rectangular frame (11); a laser positioning device (3) is fixedly installed at the center of the lower panel of the rectangular frame (11), the central axis of the laser positioning device (3) is coaxial with the center line of the pipe level (2); a power supply box (4) is fixedly installed on the back plate (12) inside the rectangular frame (11) and located on its right side panel, and a power switch (41) protruding from the right side panel of the rectangular frame (11) is provided on the right side of the power supply box (4), and the laser positioning device (3) is electrically connected to the power supply box (4).

[0005] Furthermore, the rectangular frame (11) has wire holes A (111) at the four corners of the front and at both sides of the tube level (2), and through holes (131) are provided on the cover plate (13) at positions corresponding to the wire holes A (111).

[0006] Furthermore, the laser positioning device (3) includes a positioning sleeve (31) and a laser emitter (32) installed therein. The positioning sleeve (31) is a hollow circular sleeve with a sleeve body (311) at its upper part. A threaded sleeve (312) is provided at the lower end of the sleeve body (311). An annular limiting platform (313) is provided inside the lower end of the threaded sleeve (312). An annular positioning platform is provided at the connection between the lower end of the sleeve body and the threaded sleeve. The line connecting the diameter of the annular positioning platform is perpendicular to the vertical line of the center inside the sleeve body. A threaded hole B is provided at the center of the lower panel of the rectangular frame. The threaded hole B is used to screw the threaded sleeve in from above and screw a locking nut in below the threaded sleeve to fix the positioning sleeve above the lower panel of the rectangular frame. The center of the threaded hole B is on the vertical line of the center of the tube level.

[0007] Furthermore, the laser positioning device also includes a T-nut threaded to the upper end of the sleeve body. The T-nut has a through-hole at the center above it. One end of the wire is connected to the output end of the power supply box, and the other end of the wire passes through the through-hole and is connected to the input end of the laser emitter.

[0008] Furthermore, the power box has a rectangular cross-section, and a matching rectangular hole is provided on the right side panel of the rectangular frame near the back panel. The rectangular hole is used to snap into the right end of the power box, and a charging interface is also provided directly below the power switch on the right end of the power box.

[0009] Furthermore, the rectangular frame, back plate, and cover plate are all made of aluminum alloy, and the rectangular frame and back plate are integrally machined.

[0010] The advantages and beneficial effects of this invention are as follows:

[0011] This PCCP pipe centering and positioning device features a simplified structural design and convenient operation, requiring no specialized training for technicians to operate. Its core functions include: simplicity and ease of operation; quick placement of the measuring instrument inside the PCCP pipe and adjustment to a horizontal position; and activation of the power switch, where the laser beam emitted by the laser emitter rapidly determines the pipe's centerline, significantly improving the accuracy of subsequent measurements, effectively reducing pipe installation errors, and enhancing pipe installation quality.

[0012] At the engineering application level, this device can effectively reduce axial deviation and elevation error during PCCP pipe installation, directly ensuring the construction quality of pipeline installation. From the perspective of work efficiency and economic benefits, after the device is put into use on site, it significantly shortens the operation time for pipeline centerline positioning and installation calibration, significantly improves on-site construction efficiency, and avoids rework costs by reducing installation errors, bringing clear economic benefits to the project. Attached Figure Description

[0013] Figure 1 This is the front view of the present invention;

[0014] Figure 2 For the present invention Figure 1 The right view;

[0015] Figure 3 For the present invention Figure 1 A bottom view;

[0016] Figure 4 This is a schematic diagram of the internal structure of the ruler body of the present invention;

[0017] Figure 5 This is a bottom view of the rectangular frame of the present invention;

[0018] Figure 6 This is a three-dimensional schematic diagram of the laser positioning device of the present invention;

[0019] Figure 7 This is a cross-sectional view of the laser positioning device of the present invention;

[0020] Figure 8 This is a front view of the cover plate of the present invention;

[0021] Figure 9 This is a schematic diagram illustrating the use of the present invention;

[0022] In the diagram: 1. Ruler body; 11. Rectangular frame; 111. Wire hole A; 112. Wire hole B; 113. Rectangular hole; 12. Back plate; 13. Cover plate; 131. Through hole; 2. Tube level; 3. Laser positioning device; 31. Positioning sleeve; 311. Sleeve body; 312. Wire sleeve; 313. Annular limiting platform; 314. Annular positioning platform; 32. Laser emitter; 33. T-screw; 331. Wire hole; 4. Power supply box; 41. Power switch; 42. Charging interface; 5. Locking nut; 6. Power cord; 7. Screw; 8. PCCP pipe. Detailed Implementation

[0023] Example 1, as Figure 1-8 As shown, a laser positioning device for rapid centering inside a PCCP pipe includes a ruler 1, which includes a rectangular frame 11, a back plate 12 mounted on the back of the rectangular frame 11, and a cover plate 13 mounted on the front of the rectangular frame 11. A pipe level 2 is installed at the upper center of the rectangular frame 11. A laser positioning device 3 is fixedly installed at the center of the lower panel of the rectangular frame 11, and the central axis of the laser positioning device 3 is coaxial with the center line of the pipe level 2. A power supply box 4 is fixedly installed inside the rectangular frame 11 and on the back plate 12 located on its right side panel. A power switch 41 protruding from the right side panel of the rectangular frame 11 is provided on the right side of the power supply box 4. The laser positioning device 3 is electrically connected to the power supply box 4.

[0024] In this embodiment, the four corners of the front of the rectangular frame 11 and the two sides of the tube level 2 are provided with threaded holes A111. A through hole 131 is provided on the cover plate 13 at the position corresponding to the threaded hole A111. This design allows the rectangular frame 11 and the cover plate 13 to be fixedly connected by screwing the screw 7 into the through hole 131 and the threaded hole A111 in sequence. Before the fixed connection, sealant can be applied to the connection between them to achieve waterproofing, ensuring that the laser positioning device 3 and the power box 4 inside the ruler 1 will not get damp and extending their service life.

[0025] In this embodiment, the laser positioning device 3 includes a positioning sleeve 31 and a laser emitter 32 installed therein. The positioning sleeve 31 is a hollow circular sleeve with a sleeve body 311 at its upper part. A threaded sleeve 312 is provided at the lower end of the sleeve body 311. An annular limiting platform 313 is provided inside the lower end of the threaded sleeve 312. An annular positioning platform 314 is provided at the connection between the lower end of the sleeve body 311 and the threaded sleeve 312. The diameter line of the annular positioning platform 314 is perpendicular to the center vertical line inside the sleeve body 311. A threaded hole B112 is opened at the center of the lower panel of the rectangular frame 11. The threaded hole B112 is used to screw the threaded sleeve 312 in from above and screw the locking nut 5 in below the threaded sleeve 312 to fix the positioning sleeve 31 above the lower panel of the rectangular frame 11. The center of the threaded hole B112 is on the center vertical line of the tube level 2. The above design ensures that the vertical axis of the installed laser emitter 32 coincides with the center vertical line of the tube level 2, while also being perpendicular to the upper and lower panels of the rectangular frame 11. The laser positioning device 3 also includes a T-shaped screw 33 threaded to the upper end of the sleeve body 311. The T-shaped screw 33 has a through wire hole 331 at its center. One end of the wire 6 is connected to the output end of the power supply box 4, and the other end of the wire 6 passes through the wire hole 331 and is connected to the input end of the laser emitter 32. After the laser emitter 32 is installed in the positioning sleeve 31, the laser emitting end of the laser emitter 32 abuts against the annular limiting platform 313. The laser emitted by the laser emitter 32 can be emitted through the hole located in the center of the annular limiting platform 313, and the function of the T-shaped screw 33 is to tighten and fix the upper end of the laser emitter 32.

[0026] In this embodiment, the longitudinal section of the power box 4 is rectangular. A rectangular hole 113 matching the rectangular frame 11 is provided on the right side panel near the back plate 12. The rectangular hole 113 is used to snap into the right end of the power box 4 and is sealed with sealant. A charging interface 42 is also provided directly below the power switch 41 on the right end of the power box 4, which can be used to charge the battery in the power box 4.

[0027] In this embodiment, the rectangular frame 11, the back plate 12, and the cover plate 13 are all made of 5mm thick aluminum alloy plate, which effectively prevents rust and extends service life. The rectangular frame 11 and the back plate 12 are integrally processed, while the cover plate 13 is connected to the rectangular frame 11 by screws 7, which allows for maintenance and repair of the laser positioning device 3 and the power box 4 installed inside the ruler 1 at any time.

[0028] The method of using this device is as follows:

[0029] like Figure 9As shown, the device is placed at the front end of the PCCP pipe 8 to be tested. The power switch 41 is turned on, and the laser emitter 32 emits a laser beam. The surveyor adjusts the flatness of the ruler 1 until the bubble of the tube level 2 above the ruler 1 is centered. At this time, the laser emitter 32 projects a light spot at the bottom of the PCCP pipe 8. This light spot is the vertical projection point of the central axis of the PCCP pipe 8. A prism is set up at this light spot, and the coordinates of the point are obtained by measuring with a total station. Similarly, the above operation is repeated at the rear end of the PCCP pipe 8 to be tested. Finally, the coordinate data of the rear point is obtained. By using the two sets of coordinate data, it can be calculated whether the installation position of the central axis of the PCCP pipe 8 is accurate.

[0030] It should be emphasized that the embodiments described in this invention are illustrative rather than limiting. Therefore, this invention includes, but is not limited to, the embodiments described in the specific implementation. Any other implementations derived by those skilled in the art based on the technical solutions of this invention are also within the scope of protection of this invention.

Claims

1. A laser positioning device for rapid centering within a PCCP tube, characterized in that, The system includes a ruler (1), which includes a rectangular frame (11) and a back plate (12) installed on the back of the rectangular frame (11), and a cover plate (13) installed on the front of the rectangular frame (11); a tube level (2) is installed at the center of the upper part of the rectangular frame (11); a laser positioning device (3) is fixedly installed at the center of the lower panel of the rectangular frame (11), and the central axis of the laser positioning device (3) is coaxial with the center line of the tube level (2); a power supply box (4) is fixedly installed on the back plate (12) inside the rectangular frame (11) and located on its right side panel, and a power switch (41) protruding from the right side panel of the rectangular frame (11) is provided on the right side of the power supply box (4), and the laser positioning device (3) is electrically connected to the power supply box (4).

2. The laser positioning device for rapid centering within a PCCP tube according to claim 1, characterized in that, The rectangular frame (11) has wire holes A (111) at the four corners of the front and on both sides of the tube level (2), and a through hole (131) is provided on the cover plate (13) at the position corresponding to the wire hole A (111).

3. The laser positioning device for rapid centering within a PCCP tube according to claim 1, characterized in that, The laser positioning device (3) includes a positioning sleeve (31) and a laser emitter (32) installed therein. The positioning sleeve (31) is a hollow circular sleeve with a sleeve body (311) at its upper part. A threaded sleeve (312) is provided at the lower end of the sleeve body (311). An annular limiting platform (313) is provided inside the lower end of the threaded sleeve (312). An annular positioning platform (314) is provided at the connection between the lower end of the sleeve body (311) and the threaded sleeve (312). The diameter line of the positioning platform (314) is perpendicular to the center vertical line inside the sleeve body (311); the center of the lower panel of the rectangular frame (11) is provided with a wire hole B (112), which is used to screw in the wire sleeve (312) from above, and screw in the locking nut (5) below the wire sleeve (312) to fix the positioning sleeve (31) above the lower panel of the rectangular frame (11); the center of the wire hole B (112) is on the center vertical line of the tube level (2).

4. A laser positioning device for rapid centering within a PCCP tube according to claim 3, characterized in that, The laser positioning device (3) also includes a T-nut (33) threaded to the upper end of the sleeve body (311). The T-nut (33) has a through wire hole (331) at the center above it. One end of the wire (6) is connected to the output end of the power supply box (4), and the other end of the wire (6) passes through the wire hole (331) and is connected to the input end of the laser emitter (32).

5. A laser positioning device for rapid centering within a PCCP tube according to claim 1, characterized in that, The power box (4) has a rectangular cross section. A rectangular hole (113) matching the rectangular frame (11) is provided on the right side panel near the back plate (12). The rectangular hole (113) is used to snap into the right end of the power box (4). A charging interface (42) is also provided directly below the power switch (41) on the right end of the power box (4).

6. A laser positioning device for rapid centering within a PCCP tube according to claim 1, characterized in that, The rectangular frame (11), back plate (12) and cover plate (13) are all made of aluminum alloy, and the rectangular frame (11) and back plate (12) are integrally processed.

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