High-precision and rapid positioning device and method for cable guide pipe

Abstract

This invention provides a high-precision, rapid positioning device for cable guide tubes, comprising a rigid frame and a cable guide tube body, and two positioning device bodies symmetrically arranged on the rigid frame. The two positioning device bodies are located at the upper and lower openings of the cable guide tube body, respectively, with the upper positioning device body higher than the lower one. The cable guide tube body is suspended on the two positioning device bodies. Each positioning device body is equipped with a left-side mileage control mark, an offset control mark, and a right-side mileage control mark for positioning. Positioning is achieved by using left-side, offset, and right-side mileage control marks on the positioning device bodies, eliminating the need for self-made auxiliary positioning covers and avoiding the impact of machining errors of pipe fittings or other components on positioning accuracy.

Description

Technical Field

[0001] This invention relates to the field of cable conduit construction surveying, and in particular to a high-precision and rapid positioning device and method for cable conduits. Background Technology

[0002] In recent decades, cable-stayed bridges have developed rapidly in the construction of urban expressways and highways, forming a structural system with the main girder, main tower, and stay cables as the main load-bearing elements. If the axis of the cable guide duct embedded in the main tower is not collinear with the axis of the catenary-like cable end, it will alter the stress state of the stay cable, subjecting the cable guide duct to shear force, significantly affecting its service life and posing safety hazards. High-precision measurement and positioning of the cable guide duct has become a major challenge in cable-stayed bridge construction. Therefore, in high-precision positioning measurement of the cable guide duct, the invention of high-precision positioning devices and the selection of scientific measurement methods are particularly important for the positioning quality of the cable guide duct.

[0003] Currently, the conventional method for positioning cable guide pipes involves using a self-made auxiliary positioning cover plate and a direct three-dimensional spatial coordinate positioning method, along with a high-precision total station for real-time on-site installation and positioning of the cable guide pipe's central axis. However, the positioning accuracy is greatly affected by the processing errors of the pipe fittings or other components, making it difficult to meet the required positioning precision. Furthermore, the positioning process requires multiple conversions, is cumbersome, and lacks intuitiveness.

[0004] Chinese Patent CN 112609576 B discloses a method and device for spatial attitude positioning and installation of a cable guide tube. This invention utilizes an auxiliary installation jig for the cable guide tube, which can quickly position a fixed setting point on the lower side of the cable guide tube at the designed location. Then, it acquires the spatial attitude data of the upper opening of the cable guide tube in real time, obtaining the relative angles of the X, Y, and Z planes of the cable guide tube's central axis. By adjusting the elevation and offset of the upper opening of the cable guide tube, a unique spatial attitude is obtained, thereby achieving accurate positioning of the cable guide tube and completing the installation. Simultaneously, this invention decomposes the spatial control data for cable guide tube positioning, reducing the difficulty of positioning and enhancing its operability. It also reduces the time spent working at heights, lowering the safety risks associated with working at heights. The positioning accuracy is largely affected by the processing errors of the arc plate and the installation jig, making it difficult to meet the required positioning accuracy. Therefore, a high-precision rapid positioning device and method for cable guide tubes is proposed to solve the above problems. Summary of the Invention

[0005] The main objective of this invention is to provide a high-precision and rapid positioning device and method for cable conduits, which solves the problem that the positioning accuracy is greatly affected by the processing errors of pipe fittings or other components, making it difficult to meet the positioning accuracy requirements.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a high-precision and rapid positioning device for cable guide tubes, comprising a stiffening frame and a cable guide tube body, and further comprising two positioning device bodies symmetrically arranged on the stiffening frame, the two positioning device bodies being located on the upper and lower opening sides of the cable guide tube body respectively, wherein the positioning device body located on the upper opening side is higher than the positioning device body located on the lower opening side, the cable guide tube body is suspended on the two positioning device bodies, and each of the two positioning device bodies is provided with a left mileage control mark, an offset control mark, and a right mileage control mark for positioning.

[0007] In a preferred embodiment, the positioning device body includes a positioning component, which consists of a top plate and two sliding and symmetrically arranged ranging mechanisms on the top plate. A left mileage control mark, an offset control mark, and a right mileage control mark are arranged on the top plate.

[0008] In a preferred embodiment, the ranging mechanism includes a U-shaped slider slidably mounted on the top plate, a locking screw threaded onto the side wall of the U-shaped slider, a laser rangefinder mounted on the U-shaped slider, and a height adjustment component mounted on the U-shaped slider for adjusting the height of the laser rangefinder.

[0009] The front wall of the top plate is provided with a first sliding groove, and the end thread of the locking screw passes through the side wall of the U-shaped slider and extends into the first sliding groove.

[0010] In a preferred embodiment, the height adjustment assembly includes two slide rods symmetrically arranged on a U-shaped slider, two sliders symmetrically arranged on both sides of the laser rangefinder and slidably mounted on the two slide rods, and a fixing bolt threaded onto the slider for locking the height.

[0011] In a preferred embodiment, the main body of the positioning device further includes a base plate located at the bottom of the positioning component. Two vertical rods are symmetrically arranged on the base plate. A limit plate is threadedly installed at the top of the vertical rods. Lifting blocks that are slidably fitted onto the two vertical rods are provided on both side walls of the top plate. A precision fine-tuning component for adjusting the height of the positioning component is provided on the base plate.

[0012] A tilt sensor is installed at the bottom of the top plate.

[0013] In a preferred embodiment, the precision fine-tuning component is either an electric push rod or a bolt.

[0014] In a preferred embodiment, the base plate is slidably provided with no fewer than two high-strength pipe clamp assemblies for fixing the main body of the positioning device.

[0015] In a preferred embodiment, a second transverse sliding groove is provided on the side wall of the base plate, and the high-strength pipe clamp assembly includes a connecting rod passing through the second sliding groove, screws and pipe clamps respectively provided at both ends of the connecting rod, a locking nut threaded onto the outside of the connecting rod, and a locking screw threaded onto the pipe clamp.

[0016] The method includes:

[0017] S1. Using a high-precision total station, lay out the height of the upper and lower sides of the cable guide body, install the two positioning device bodies on them respectively, and then accurately lay out the positions of the left mileage control mark, offset control mark and right mileage control mark on the two positioning device bodies respectively, and mark them.

[0018] S2. Hoist the main body of the cable guide tube onto the main bodies of the two positioning devices, and position the upper and lower ends of the main body of the cable guide tube at the line connecting the left and right mileage control marks of the two positioning devices, respectively.

[0019] S3. Measure the horizontal distance between the main body of the cable guide and the left and right mileage control signs, ensuring that both sides are equal;

[0020] S4. Then rotate the cable guide body appropriately, and use a crowbar and a hand chain hoist to precisely adjust the spatial position of the cable guide body so that the center points of the upper and lower sides of the cable guide body are aligned with the offset control marks on the two positioning device bodies, and the upper and lower sides of the cable guide body are parallel to the straight line formed by the left mileage control mark and the right mileage control mark.

[0021] S5. The position and height of the positioning device body on the upper and lower opening sides of the cable guide body, the left mileage control mark, the offset control mark and the right mileage control mark are re-measured. When the difference between the measured elevation and the design elevation exceeds the design requirements, the elevation of the top of the positioning device body is adjusted by the precision fine-tuning component to fine-tune the cable guide elevation.

[0022] In the preferred embodiment, the specific measurement method in step S3 is as follows: the two ranging mechanisms on the main body of the positioning device are adjusted to the positions of the left mileage control mark and the right mileage control mark, respectively. Then, the horizontal distance between the main body of the cable guide and the left mileage control mark and the right mileage control mark is measured by the laser rangefinder on the two ranging mechanisms to ensure that the distances on both sides are equal.

[0023] This invention provides a high-precision and rapid positioning device and method for cable conduits, which has the following advantages:

[0024] 1. Positioning is achieved by setting left-side mileage control marks, offset control marks, and right-side mileage control marks on the main body of the positioning device. There is no need to make an auxiliary positioning cover plate, thus avoiding the impact of processing errors of pipes or other components on positioning accuracy.

[0025] 2. By using the top plate with strong pipe clamp components and precision fine-tuning components as support points, and using a high-precision total station to lay out the left mileage control mark, offset control mark and right mileage control mark on the support points, the process can be simplified, the installation accuracy can be improved, the installation time can be saved, the difficulty of the measurement operation can be reduced, and the measurement efficiency can be improved. At the same time, the precision fine-tuning components can achieve more precise fine-tuning.

[0026] 3. Using this measuring device simplifies the operation steps, and the cable guide positioning can be carried out 24 hours a day, avoiding the positioning time requirements during the stable temperature period at night. This effectively avoids the safety risks of nighttime measurement for surveyors, and at the same time, it is guaranteed in process control, effectively improving the efficiency of measurement work. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0028] Figure 1 This is a top view of the main body of the cable guide tube of the present invention being hoisted.

[0029] Figure 2 This is a side view of the main body of the cable guide tube of the present invention during hoisting;

[0030] Figure 3 This is a structural diagram of the positioning device of the present invention;

[0031] Figure 4 This is a front view of the main body of the positioning device of the present invention;

[0032] Figure 5 This is a structural diagram of the positioning component of the present invention;

[0033] Figure 6 This is a structural diagram of the ranging mechanism of the present invention;

[0034] Figure 7 This is a front view of the ranging mechanism of the present invention;

[0035] Figure 8 This is a structural diagram of the base plate of the present invention;

[0036] Figure 9 This is a structural diagram of the high-strength pipe clamp assembly of the present invention;

[0037] In the diagram: 1. Rigid frame; 2. Positioning device body; 3. Cable guide body; 4. Left mileage control mark; 5. Offset control mark; 6. Right mileage control mark; 7. Hand chain hoist; 21. Base plate; 211. Second slide groove; 22. Vertical rod; 221. Limiting plate; 23. Positioning assembly; 231. Top plate; 232. Lifting block; 233. First slide groove; 24. Precision fine-tuning assembly; 25. Heavy-duty pipe clamp assembly; 251. Connecting rod; 252. Screw; 253. Pipe clamp; 254. Locking nut; 255. Locking screw; 26. Distance measuring mechanism; 261. U-shaped slider; 262. Locking screw; 263. Laser rangefinder; 264. Slide rod; 265. Slider; 266. Fixing bolt; 27. Tilt sensor. Detailed Implementation

[0038] Example 1

[0039] like Figure 1-9 As shown, the high-precision rapid positioning device for cable guide tubes includes a stiffening frame 1 and a cable guide tube body 3, as well as two positioning device bodies 2 symmetrically arranged on the stiffening frame 1. The two positioning device bodies 2 are located on the upper and lower opening sides of the cable guide tube body 3, respectively. The positioning device body 2 located on the upper opening side is higher than the positioning device body 2 located on the lower opening side. The cable guide tube body 3 is hoisted on the two positioning device bodies 2. Each of the two positioning device bodies 2 is provided with a left mileage control mark 4, an offset control mark 5, and a right mileage control mark 6 for positioning.

[0040] In use, the installation positions of the two positioning device bodies 2 are determined by a high-precision total station, and the positions of the left mileage control mark 4, the offset control mark 5 and the right mileage control mark 6 are accurately laid out on the two positioning device bodies 2 respectively. The installation effect of the positioning cable guide body 3 is achieved by using the left mileage control mark 4, the offset control mark 5 and the right mileage control mark 6.

[0041] It should be noted that the left-side mileage control sign 4, the offset control sign 5, and the right-side mileage control sign 6 can be stickers or painted marks.

[0042] In a preferred embodiment, the main body 2 of the positioning device includes a positioning component 23, which consists of a top plate 231 and two sliding and symmetrically arranged distance measuring mechanisms 26 on the top plate 231. The left mileage control mark 4, the offset control mark 5 and the right mileage control mark 6 are arranged on the top plate 231.

[0043] The two distance measuring mechanisms 26 can measure the horizontal distance between the cable guide body 3 and the left and right mileage control marks 4 and 6 respectively by sliding them to the positions of the left mileage control mark 4 and the right mileage control mark 6 respectively.

[0044] In a preferred embodiment, the ranging mechanism 26 includes a U-shaped slider 261 slidably disposed on the top plate 231, a locking screw 262 threadedly mounted on the side wall of the U-shaped slider 261, a laser rangefinder 263 disposed on the U-shaped slider 261, and a height adjustment component disposed on the U-shaped slider 261 for adjusting the height of the laser rangefinder 263.

[0045] The horizontal distance between the cable guide body 3 and the left mileage control mark 4 and the right mileage control mark 6 is measured by the laser rangefinder 263.

[0046] In addition, a first groove 233 is provided on the front wall of the top plate 231, and the end thread of the locking screw 262 passes through the side wall of the U-shaped slider 261 and extends into the first groove 233. A threaded hole for the locking screw 262 to pass through is provided on the side wall of the U-shaped slider 261.

[0047] The U-shaped slider 261 is sized to match the top of the top plate 231. The U-shaped slider 261 is movably mounted on the top of the top plate 231. The locking screw 262 passes through the side wall of the U-shaped slider 261 and extends into the first slide groove 233, thus restricting the U-shaped slider 261 to slide only along the first slide groove 233. At the same time, by rotating the locking screw 262, the position is locked to prevent unnecessary sliding during measurement. In addition, the height adjustment component can adjust the operating height of the laser rangefinder 263 to ensure that the laser rangefinder 263 located on the upper side of the cable guide body 3 can illuminate the guide body 3.

[0048] In a preferred embodiment, the height adjustment assembly includes two slide rods 264 symmetrically welded to a U-shaped slider 261, two sliders 265 symmetrically fixed on both sides of a laser rangefinder 263 and slidably mounted on the two slide rods 264, and a fixing bolt 266 threaded onto the slider 265 for locking the height.

[0049] It should be noted that the slider 265 is provided with a through hole for the slide rod 264 to pass through. The height of the laser rangefinder 263 can be adjusted by sliding the slider 265 on the slide rod 264. The slider 265 is provided with a threaded hole for the threaded bolt 266 to pass through. By rotating the fixing bolt 266, its end can be made to contact the slide rod 264, thereby achieving the effect of locking the height of the laser rangefinder 263.

[0050] In a preferred embodiment, the positioning device body 2 further includes a base plate 21 located at the bottom of the positioning component 23. Two vertical rods 22 are symmetrically welded on the base plate 21. A limiting plate 221 is threaded onto the top of each vertical rod 22. Lifting blocks 232 are respectively slidably fitted onto the two vertical rods 22 on both side walls of the top plate 231. The lifting blocks 232 and the top plate 231 are integrally formed. The lifting blocks 232 are provided with through holes for the vertical rods 22 to pass through. The limiting plate 221 can be used to limit the lifting height of the positioning component 23. A precision fine-tuning component 24 is provided on the base plate 21 for adjusting the height of the positioning component 23. The precision fine-tuning component 24 can fine-tune the height of the top plate 231, thereby achieving more accurate positioning.

[0051] A tilt sensor 27 is fixedly installed at the bottom of the top plate 231 to detect the overall levelness of the positioning device body 2, so as to avoid any tilting that is not easily noticed.

[0052] It should be noted that the precision fine-tuning component 24 is either an electric push rod or a bolt. In this embodiment, two electric push rods are used. The electric push rods are fixedly installed on the base plate 21, and their output ends are connected to the top plate 231, so that the height of the top plate 231 can be adjusted by pushing the electric push rods.

[0053] Another bolt adjustment method is to open a threaded hole on the base plate 21 and make the bolt thread pass through the threaded hole, and adjust the height of the top plate 231 by rotating the bolt.

[0054] In a preferred embodiment, at least two strong pipe clamp assemblies 25 are slidably provided on the base plate 21 for fixing the main body 2 of the positioning device. The slidable strong pipe clamp assemblies 25 facilitate adjustment of the installation position according to the actual position of the rigid frame 1 on site.

[0055] In a preferred embodiment, a second transverse sliding groove 211 is provided on the side wall of the base plate 21. The high-strength pipe clamp assembly 25 includes a connecting rod 251 passing through the second sliding groove 211, a screw 252 and a pipe clamp 253 respectively fixed at both ends of the connecting rod 251, a locking nut 254 threaded onto the outside of the connecting rod 251, and a locking screw 255 threaded onto the pipe clamp 253.

[0056] In use, the position of the strong pipe clamp assembly 25 is adjusted by sliding the connecting rod 251 in the second slide groove 211. After adjustment, the position of the strong pipe clamp assembly 25 is locked by rotating the locking nut 254 and making it contact the base plate 21. Finally, the pipe clamp 253 is connected to the rigid frame 1 and the locking screw 255 is rotated to achieve the locking effect.

[0057] Example 2

[0058] Further explanation in conjunction with Example 1, such as Figure 1-9 The structure shown illustrates a high-precision and rapid positioning method for cable conduits, which includes:

[0059] S1. Using a high-precision total station, lay out the height of the upper and lower sides of the cable guide body 3, install the two positioning device bodies 2 on them respectively, and then accurately lay out the positions of the left mileage control mark 4, the offset control mark 5 and the right mileage control mark 6 on the two positioning device bodies 2 respectively, and mark them.

[0060] S2. Hoist the cable guide body 3 onto the two positioning device bodies 2, and position the upper and lower ends of the cable guide body 3 at the line connecting the left mileage control mark 4 and the right mileage control mark 6 of the two positioning device bodies 2, respectively.

[0061] S3. Measure the horizontal distance between the main body 3 of the cable guide tube and the left mileage control sign 4 and the right mileage control sign 6, and ensure that the distances on both sides are equal;

[0062] S4. Then rotate the cable guide body 3 appropriately, and use a crowbar and hand chain hoist 7 to precisely adjust the spatial position of the cable guide body 3 so that the center points of the upper and lower sides of the cable guide body 3 are aligned with the offset control marks 5 on the two positioning device bodies 2 respectively, and the upper and lower sides of the cable guide body 3 are parallel to the straight line formed by the left mileage control mark 4 and the right mileage control mark 6.

[0063] S5. The position and height of the positioning device body 2, left mileage control mark 4, offset control mark 5 and right mileage control mark 6 on the upper and lower opening sides of the re-measured cable guide body 3. When the difference between the measured elevation and the design elevation exceeds the design requirements, the elevation of the top of the positioning device body 2 is adjusted by the precision fine-tuning component 24 to fine-tune the cable guide elevation.

[0064] In the preferred embodiment, the specific measurement method in step S3 is as follows: the two ranging mechanisms 26 on the main body 2 of the positioning device are adjusted to the positions of the left mileage control mark 4 and the right mileage control mark 6, respectively. Then, the horizontal distance between the cable guide body 3 and the left mileage control mark 4 and the right mileage control mark 6 is measured by the laser rangefinder 263 on the two ranging mechanisms 26 to ensure that the distances on both sides are equal.

[0065] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A high-precision and rapid positioning device for cable conduit, comprising a stiff skeleton (1) and a cable conduit main body (3), characterized in that: Two positioning device bodies (2) are symmetrically arranged on the rigid framework (1), and are located on the upper opening side and the lower opening side of the cable guide pipe body (3) respectively. The positioning device body (2) comprises a positioning assembly (23), the positioning assembly (23) is composed of a top plate (231) and two distance measuring mechanisms (26) which are slidably and symmetrically arranged on the top plate (231), and the left mileage control mark (4), the offset distance control mark (5) and the right mileage control mark (6) are arranged on the top plate (231). The distance measuring mechanism (26) comprises a U-shaped sliding block (261) slidably arranged on the top plate (231), a locking screw (262) threadedly installed on the side wall of the U-shaped sliding block (261), a laser range finder (263) arranged on the U-shaped sliding block (261), and a height adjusting assembly arranged on the U-shaped sliding block (261) and used for adjusting the height of the laser range finder (263). The positioning device body (2) further comprises a bottom plate (21) located at the bottom of the positioning assembly (23), and the bottom plate (21) is provided with a precision fine adjustment assembly (24) used for adjusting the height of the positioning assembly (23).

2. The high-precision fast positioning device for cable conduit according to claim 1, characterized in that: The front wall surface of the top plate (231) is provided with a first sliding groove (233), and the end of the locking screw (262) is threadedly passed through the side wall of the U-shaped sliding block (261) and extends into the first sliding groove (233).

3. The high-precision and fast positioning device for the cable conduit according to claim 2, characterized in that: The height adjusting assembly comprises two sliding rods (264) symmetrically arranged on the U-shaped sliding block (261), two sliding blocks (265) symmetrically arranged on both sides of the laser range finder (263) and slidably sleeved on the two sliding rods (264) respectively, and a fixing bolt (266) threadedly installed on the sliding block (265) and used for locking the height.

4. The high-precision fast positioning device for cable conduit according to any one of claims 1-2, characterized in that: The bottom plate (21) is symmetrically provided with two vertical rods (22), the top end of the vertical rod (22) is threadedly installed with a limiting plate (221), and the two side walls of the top plate (231) are provided with lifting blocks (232) slidably sleeved on the two vertical rods (22) respectively. The bottom of the top plate (231) is provided with an inclination sensor (27).

5. The high-precision fast positioning device for cable conduit according to claim 4, characterized in that: The precision fine adjustment assembly (24) is one of an electric push rod or a bolt.

6. The high-precision fast positioning device for cable conduit according to claim 4, characterized in that: The bottom plate (21) is slidably provided with not less than two strong pipe clamping assemblies (25) for fixing the positioning device body (2).

7. The high-precision fast positioning device for cable conduit according to claim 6, characterized in that: The side wall of the bottom plate (21) is provided with a second transverse sliding groove (211), the strong pipe clamp assembly (25) comprises a connecting rod (251) penetrating through the second sliding groove (211), a screw rod (252) and a pipe clamp (253) respectively arranged at two ends of the connecting rod (251), a locking nut (254) threadedly sleeved outside the connecting rod (251), and a locking screw rod (255) threadedly mounted on the pipe clamp (253).

8. The positioning method of the high-precision and fast positioning device for the cable conduit according to any one of claims 4-7, characterized in that: The method comprises: S1, the height of the upper side and the lower side of the cable guide pipe body (3) is lofted by a high-precision total station, two positioning device bodies (2) are respectively installed thereon, then the positions of the left mileage control mark (4), the offset distance control mark (5) and the right mileage control mark (6) are precisely lofted on the two positioning device bodies (2) respectively, and the marks are well marked; S2, the cable guide pipe body (3) is hoisted to the two positioning device bodies (2), and the upper side and the lower side of the cable guide pipe body (3) are respectively located at the position of the left mileage control mark (4) and the right mileage control mark (6) connecting line of the two positioning device bodies (2); S3, the horizontal distance between the cable guide pipe body (3) and the left mileage control mark (4) and the right mileage control mark (6) is measured to ensure that the two sides are equal; S4, then the cable guide pipe body (3) is appropriately rotated, the spatial position of the cable guide pipe body (3) is precisely adjusted by using a crowbar and a hand-operated hoist (7), the center points of the upper side and the lower side of the cable guide pipe body (3) are respectively aligned with the offset distance control marks (5) on the two positioning device bodies (2), and the upper side and the lower side of the cable guide pipe body (3) are parallel to the straight line connected by the left mileage control mark (4) and the right mileage control mark (6); S5, the positions and heights of the positioning device bodies (2), the left mileage control mark (4), the offset distance control mark (5) and the right mileage control mark (6) on the upper side and the lower side of the cable guide pipe body (3) are re-measured, when the difference between the measured elevation and the designed elevation exceeds the design requirement, the elevation of the top of the positioning device body (2) is adjusted by the precision fine adjustment assembly (24), and the cable guide pipe elevation is fine adjusted.

9. The positioning method of the high-precision and fast positioning device for the cable conduit according to claim 8, characterized in that: In step S3, the specific measurement method is that the two distance measuring mechanisms (26) on the positioning device body (2) are respectively adjusted to the positions of the left mileage control mark (4) and the right mileage control mark (6), then the horizontal distances between the cable guide pipe body (3) and the left mileage control mark (4) and the right mileage control mark (6) are measured by the laser range finders (263) on the two distance measuring mechanisms (26), and it is ensured that the two sides are equal.

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