Cable conduit center positioning device

Abstract

The utility model provides a cable conduit center positioning device. The cable conduit center positioning device comprises a prism, the prism is installed in the center of the surface of the positioning structure, the positioning structure comprises a positioning disc, a positioning plate and a sliding groove, the prism is installed in the center of the surface of the positioning disc, the positioning plate is fixed to the surface of the positioning disc, and the sliding groove is formed in the surface of the positioning plate; the positioning plate is fixed on the surface of the limiting structure; the limiting structure is clamped on the outer edge of an opening at one end of the cable guide pipe; the inflation inlet penetrates through the side wall of one end of the limiting structure; the cable conduit center positioning device provided by the utility model has the advantages that a prism can be prevented from being manually erected at high altitude, personal errors are reduced, and three-dimensional coordinates of a steel anchor beam cable conduit tower entering point and a flange connector center point can be conveniently and directly measured.

Description

Technical Field

[0001] The utility model relates to the technical field of cable duct measurement, in particular to a cable duct center positioning device. Background Art

[0002] The stay cable is the link connecting the tower and the beam of the cable-stayed bridge. One end of it is anchored at the tower end, and the other end is anchored at the main beam. The length ranges from dozens of meters to hundreds of meters. When the axis of the cable duct is inconsistent with the axis of the stay cable end in the catenary state, it will change the stress state of the stay cable, making it locally shear-loaded, which not only affects its service life but also is extremely unsafe.

[0003] After retrieval, the patent publication number CN 219908610 U discloses a cable duct center positioning device for a cable-stayed bridge, which includes a positioning plate placed in the cable duct and multiple groups of adjusting components. The multiple groups of adjusting components are arranged along the circumferential direction of the positioning plate. The adjusting component includes a nut fixed on the positioning plate and an adjusting screw passing through the nut. The adjusting screw can move radially along the positioning plate. At least three fixing rods are provided on the top surface of the positioning plate, and the fixing rods extend towards the outside of the positioning plate to be erected at the pipe orifice of the cable duct. The top surface of the positioning plate is flush with the pipe orifice surface of the cable duct.

[0004] During the installation process of the cable duct of the cable-stayed bridge, it is necessary to find the axis of the cable duct and make it coincide with the designed stay cable axis; since the cable duct is a hollow structure, during measurement, the prism must be erected on the axis of the cable duct to determine whether its spatial position is correct; however, the currently known method for measuring the center can weld positioning angle irons at the pipe orifice of the cable duct, and then use a tape measure to measure the length of the angle iron to mark its center point as the center of the cable duct. This method requires manual erection of the prism at high altitude, which has certain human errors and is not convenient for directly measuring the three-dimensional coordinates of the anchoring point and the tower exit point of the steel anchor beam cable duct.

[0005] Therefore, it is necessary to provide a new cable duct center positioning device to solve the above technical problems. Content of the Utility Model

[0006] The technical problem solved by the utility model is to provide a cable duct center positioning device that can avoid manual erection of the prism at high altitude, reduce human errors, and facilitate direct measurement of the three-dimensional coordinates of the tower entry point and the center point of the flange connection of the steel anchor beam cable duct.

[0007] To solve the above technical problems, the cable duct center positioning device provided by the present utility model includes: a prism; a positioning structure, the prism is installed at the center position on the surface of the positioning structure, the positioning structure includes a positioning disk, a positioning plate and a sliding groove, the prism is installed at the center position on the surface of the positioning disk, the positioning plate is fixed on the surface of the positioning disk, and the sliding groove is arranged on the surface of the positioning plate; a limiting structure, the positioning plate is fixed on the surface of the limiting structure; a cable duct, the limiting structure is clamped on the outer edge of the opening at one end of the cable duct; an air inlet, the air inlet penetrates through the side wall at one end of the limiting structure.

[0008] Preferably, the limiting structure further includes a limiting ring, an airbag, a guard plate, a threaded post and a receiving groove, the positioning plate is fixed on the surface of the limiting ring, one end of the airbag is fixed inside the limiting ring, the guard plates are sequentially and equidistantly fixed on the inner side wall surface of the airbag, the threaded post is fixed at one end of the surfaces of the guard plates fixed opposite to each other at both ends, and the receiving groove is arranged on the inner edge of the surface of the limiting ring.

[0009] Preferably, the inside of the limiting ring is hollow, and the outer peripheral side wall of the airbag is fixedly connected to the inner side wall inside the limiting ring, and the other end of the airbag is slidably connected to the inside of the limiting ring through the guard plate.

[0010] Preferably, the position of the threaded post corresponds to the position of the receiving groove, and the space of the receiving groove can allow the threaded post to be inserted, and the width of the inner space of the limiting ring coincides with the width of the guard plate.

[0011] Preferably, there are multiple groups of the guard plates, and the distance between each group of the guard plates is equal, and the back side wall of the guard plate is arc-shaped, and the guard plate slides in the inner space of the limiting ring.

[0012] Preferably, the airbag has ductility, and one end of the air inlet penetrates through the side wall of the limiting ring and is connected to the side wall at one end of the airbag, and the airbag is communicated with the air inlet, and a one-way valve is arranged inside the air inlet.

[0013] Preferably, the top end of the threaded post penetrates through the sliding groove, and the length of the sliding groove is greater than the extending length of the airbag, and the top end of the threaded post is positioned by a nut in a threaded manner.

[0014] Compared with the related art, the cable duct center positioning device provided by the present utility model has the following beneficial effects:

[0015] The utility model provides a center positioning device for a cable duct. First, the installation position of the cable duct is preliminarily positioned. The center positioning device of the cable duct is placed at the measurement site, and the inside of the limiting structure is inflated through the inflation port, so that the airbag in the limiting structure expands. Then, the position of the positioning structure is positioned on the side wall of one end opening of the cable duct under the extrusion of the airbag. Under the limitation of the positioning structure, the positioning structure can coincide with the center point of the cable duct. Then, a nut is threadedly connected to the threaded column, so that the nut abuts against the surface of the positioning structure. At the same time, the inner side wall of the limiting structure is clamped on the bottom surface of the positioning structure through the threaded column to limit the position of the inner side of the limiting structure. At this time, the position of the prism will coincide with the center point position of the cable duct. Then, the prism is used to measure it. This device has the advantages of being able to avoid manually erecting a prism at high altitude, reducing human errors, and facilitating the direct measurement of the three-dimensional coordinates of the cable duct entry point into the tower and the center point of the flange connection port. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a schematic structural diagram of a preferred embodiment of the cable duct center positioning device provided by the utility model;

[0017] Figure 2 is Figure 1 a schematic structural diagram of the overall top view shown;

[0018] Figure 3 is Figure 1 a schematic structural diagram of the overall side view section shown;

[0019] Figure 4 is Figure 2 a schematic structural diagram of the overall section shown.

[0020] Reference numerals in the figure: 1, prism; 2, positioning structure, 21, positioning disc, 22, positioning plate, 23, sliding groove; 3, limiting structure, 31, limiting ring, 32, airbag, 33, protection plate, 34, threaded column, 35, receiving groove; 4, cable duct; 5, inflation port. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0022] Please refer to Figures 1 to 4 , Figure 1 which is a schematic structural diagram of a preferred embodiment of the cable duct center positioning device provided by the utility model; Figure 2 is Figure 1 a schematic structural diagram of the overall top view shown; Figure 3 is Figure 1Schematic structural diagram of the overall side view section shown; Figure 4 is Figure 2 Schematic structural diagram of the overall section shown. The cable duct center positioning device includes: Prism 1; Positioning structure 2, the Prism 1 is installed at the center position of the surface of the Positioning structure 2, the Positioning structure 2 includes a positioning disk 21, a positioning plate 22 and a sliding groove 23, the Prism 1 is installed at the center position of the surface of the positioning disk 21, the positioning plate 22 is fixed on the surface of the positioning disk 21, and the sliding groove 23 is arranged on the surface of the positioning plate 22; Limiting structure 3, the positioning plate 22 is fixed on the surface of the Limiting structure 3; Cable duct 4, the Limiting structure 3 is engaged with the outer edge of the opening at one end of the cable duct 4; Inflation port 5, the inflation port 5 penetrates the side wall at one end of the Limiting structure 3.

[0023] In the specific implementation process, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, the Limiting structure 3 further includes a limiting ring 31, an airbag 32, a protection plate 33, a threaded column 34 and a receiving groove 35. The positioning plate 22 is fixed on the surface of the limiting ring 31. One end of the airbag 32 is fixed inside the limiting ring 31. The protection plates 33 are sequentially and equidistantly fixed on the inner side wall surface of the airbag 32. The threaded column 34 is fixed at one end of the protection plates 33 with opposite ends fixed. The receiving groove 35 is arranged on the inner edge of the surface of the limiting ring 31; The inside of the limiting ring 31 is hollow, and the outer peripheral side wall of the airbag 32 is fixedly connected to the inner side wall of the inside of the limiting ring 31, and the other end of the airbag 32 is slidably connected to the inside of the limiting ring 31 through the protection plate 33; There are multiple groups of the protection plates 33, and the distance between each group of the protection plates 33 is equal. The back side wall of the protection plate 33 is arc-shaped, and the protection plate 33 slides in the inner space of the limiting ring 31; The airbag 32 has ductility, and one end of the inflation port 5 penetrates the side wall of the limiting ring 31 and is connected to the side wall at one end of the airbag 32. The airbag 32 is communicated with the inflation port 5, and a one-way valve is arranged inside the inflation port 5.

[0024] It is convenient to make the airbag 32 expand rapidly by itself when inflated, push the protection plate 33 to slide outwards, and then one end of it is pushed out of the inside of the limiting ring 31, so that it hugs the side wall of the cable duct 4 through the protection plate 33, and the position of the limiting ring 31 is fixed.

[0025] In the specific implementation process, such as Figure 1 , Figure 2 and Figure 3As shown, the position of the threaded post 34 corresponds to the position of the receiving groove 35, and the space of the receiving groove 35 can allow the threaded post 34 to be snapped in, and the width of the inner space of the limiting ring 31 coincides with the width of the guard plate 33; the top end of the threaded post 34 penetrates through the sliding groove 23, and the length of the sliding groove 23 is greater than the extended length of the airbag 32, and the top end of the threaded post 34 is positioned by a nut in a threaded manner.

[0026] When the sliding plate is pushed out of the inside of the limiting ring 31 and abuts against the side wall of the cable duct 4, the threaded post 34 also slides towards one end inside the sliding groove 23. After the position of the limiting ring 31 is positioned, a nut can be threadedly connected to the threaded post 34, and the nut can clamp the guard plate 33 to the bottom surface of the positioning plate 22 through the threaded post 34.

[0027] The working principle of the cable duct center positioning device provided by the present utility model is as follows:

[0028] During use, first, the installation position of the cable duct 4 is preliminarily positioned, and then the limiting ring 31 is sleeved from one end of the cable duct 4, so that the positioning plate 22 abuts against the cross-section at one end of the cable duct 4, and the position of the limiting ring 31 is at the edge of the opening at one end of the cable duct 4 under the limitation of the positioning plate 22. Then, the inflation port 5 installed on the side wall of the limiting ring 31 is connected to an external inflation device, and the inflation device inflates the airbag 32 through the inflation port 5. The airbag 32 will start to expand, and one end of the inner side is pushed out from the inside of the limiting ring 31, driving the guard plate 33 to slide out of the inside of the limiting ring 31. As more gas is injected into the airbag 32, the guard plate 33 abuts against the side wall of the cable duct 4 under the support of the airbag 32. The airbag 32 will hug the periphery of the opening of the cable duct 4 through the guard plate 33, so that the position of the limiting ring 31 is fixed by the airbag 32. At the same time, the threaded post 34 will slide out of the receiving groove 35 following the sliding of the guard plate 33, and the side wall of the threaded post 34 also slides inside the sliding groove 23. At this time, by threadedly connecting a nut to the top end of the threaded post 34, the guard plate 33 can be driven to be clamped to the bottom surface of the positioning plate 22, so that the position of the guard plate 33 is fixed, and the guard plate 33 supports the position of the limiting ring 31. At this time, the position of the positioning disc 21 fixed to the positioning plate 22 is at the center position of the opening of the cable duct 4, and the prism 1 fixed to the center point of the side wall of the positioning disc 21 is on the center line inside the cable duct 4. Then, the prism 1 is used for measurement. This device has the advantages of being able to avoid manually erecting the prism 1 at high altitudes, reducing human errors, and facilitating direct measurement of the three-dimensional coordinates of the cable duct 4 entry point into the tower and the center point of the flange connection port.

[0029] Compared with the related technologies, the cable duct center positioning device provided by the present utility model has the following beneficial effects:

[0030] The present utility model provides a cable duct center positioning device. First, the installation position of the cable duct 4 is preliminarily positioned. The center positioning device of the cable duct 4 is placed at the measurement site. The inside of the limiting structure 3 is inflated through the inflation port 5, so that the airbag 32 in the limiting structure 3 expands. Subsequently, the position of the positioning structure 2 is positioned on the side wall of the opening at one end of the cable duct 4 under the extrusion of the airbag 32. Under the limitation of the positioning structure 2, the positioning structure 2 can coincide with the center point of the cable duct 4. Then, a nut is threadedly connected to the threaded column 34, so that the nut abuts against the surface of the positioning structure 2. At the same time, the inner side wall of the limiting structure 3 is clamped on the bottom surface of the positioning structure 2 through the threaded column 34 to limit the position of the inside of the limiting structure 3. At this time, the position of the prism 1 will coincide with the center point position of the cable duct 4. Then, the prism 1 is used to measure it. This device has the advantages of being able to avoid manually erecting the prism 1 at high altitude, reducing human errors, and facilitating the direct measurement of the three-dimensional coordinates of the cable duct 4 of the steel anchor beam entering the tower point and the center point of the flange connection port.

[0031] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A cable guide tube center positioning device, characterized in that: include; Prism (1); A positioning structure (2), wherein the prism (1) is mounted at a central position on a surface of the positioning structure (2), the positioning structure (2) comprising a positioning disk (21), a positioning plate (22) and a slide groove (23), the prism (1) is mounted at a central position on a surface of the positioning disk (21), the positioning plate (22) is fixed to a surface of the positioning disk (21), and the slide groove (23) is provided on a surface of the positioning plate (22); A limiting structure (3), wherein the positioning plate (22) is fixed to a surface of the limiting structure (3); A cable guide tube (4), wherein the limiting structure (3) is engaged with an outer edge of an opening at one end of the cable guide tube (4); An inflation port (5), wherein the inflation port (5) passes through a side wall at one end of the limiting structure (3).

2. The cable guide tube center positioning device according to claim 1, characterized in that: The limiting structure (3) further comprises a limiting ring (31), an airbag (32), a guard plate (33), a threaded column (34) and a receiving groove (35), wherein the positioning plate (22) is fixed to the surface of the limiting ring (31), one end of the airbag (32) is fixed to the inside of the limiting ring (31), the guard plate (33) is fixed to the surface of the inner wall of the airbag (32) in sequence and at equal intervals, the threaded column (34) is fixed to one end of the surface of the guard plate (33) whose two ends are relatively fixed, and the receiving groove (35) is arranged at the inner edge of the surface of the limiting ring (31).

3. The cable guide tube center positioning device according to claim 2, characterized in that: The interior of the limiting ring (31) is hollow, and the outer side wall of the airbag (32) is fixedly connected to the inner side wall of the limiting ring (31), and the other end of the airbag (32) is slidably connected to the interior of the limiting ring (31) through the guard plate (33).

4. The cable guide tube center positioning device according to claim 2, characterized in that: The position of the threaded column (34) corresponds to the position of the accommodating groove (35), the space of the accommodating groove (35) is capable of allowing the threaded column (34) to be inserted, and the width of the internal space of the limiting ring (31) coincides with the width of the guard plate (33).

5. The cable guide tube center positioning device according to claim 2, characterized in that: The guard plates (33) are provided in a plurality of groups, and the distances between the guard plates (33) in each group are equal. The back side walls of the guard plates (33) are arc-shaped, and the guard plates (33) slide in the internal space of the limiting ring (31).

6. The cable guide tube center positioning device according to claim 2, characterized in that: The airbag (32) is extensible, and one end of the inflation port (5) penetrates through the side wall of the limiting ring (31) and is connected to the side wall of one end of the airbag (32), and the airbag (32) is communicated with the inflation port (5), and a one-way valve is provided inside the inflation port (5).

7. The cable guide tube center positioning device according to claim 2, characterized in that: The top end of the threaded column (34) passes through the slide groove (23), the length of the slide groove (23) is greater than the extended length of the airbag (32), and the top end of the threaded column (34) is positioned by a nut thread.

Images