Bridge support arm for tunnels
By setting multiple non-overlapping adjustment holes and limiting plate structures on the cable tray support arm for tunnels, the problem of unstable column fixation was solved, and stable support of the cable tray was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHENGZHOU CHANGTONG ELECTROMECHANICAL CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-06-09
AI Technical Summary
The existing tunnel cable tray support arms are not fixed to the columns stably, which causes the support plate to tilt at different angles and cannot provide stable support.
By setting multiple adjustment holes on the mounting plate, with the centers of the adjustment holes not coinciding and the included angle being n°, and combining the elongated holes and the bolt insertion into the adjustment holes, the tilt angle of the column can be reliably adjusted, and the fixing stability is ensured by the limit plate and bolt sliding groove structure.
This ensures the stable fixation of the columns, guarantees the stable support of the cable tray, and avoids angle changes caused by vibration.
Smart Images
Figure CN224342880U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cable tray support technology, and in particular to a cable tray support for tunnels. Background Technology
[0002] The arched roof of the tunnel provides excellent pressure resistance. However, when a standard cable tray support arm is installed on the arched tunnel roof, the support plate used to support the cable tray may be tilted at an angle. This results in the support plates of multiple cable tray supports not being on the same plane, leading to unstable support for the cable tray. Therefore, the support plate at the bottom of the cable tray support arm for tunnels needs to be adjustable to ensure stable support for the cable tray.
[0003] The existing tunnel bridge support arm mainly includes an installation plate, a column, and a support plate for adjusting the angle of the support plate. The support plate is fixed on the column. The installation plate is provided with a round hole and an arc-shaped adjustment hole. The column is fixed to the installation plate by two bolts. By loosening the bolts corresponding to the arc-shaped hole, the tilt angle of the column can be adjusted, thereby achieving the purpose of adjusting the tilt angle of the support plate.
[0004] For example, Chinese Patent CN216625157U discloses a power supply cable tray that can be adjusted according to the curvature of the tunnel roof, and Chinese Patent CN210326963U discloses an adjustable tunnel-specific support arm. Both existing tunnel cable tray support arms use the same adjustment method: tightening bolts and nuts corresponding to the curved adjustment holes clamps the mounting plate and the column, thus fixing the column's tilt angle. However, existing tunnel cable tray support arms have the following drawbacks when fixing the column:
[0005] If the bolts and nuts corresponding to the arc-shaped adjustment holes are not tightened to a certain torque, or if the nuts become loose due to vibration during the installation of cable trays and cables or during use, the column may rotate, causing the tilt angle of the support plate to change again. Therefore, the stability of the column fixation is not good. Utility Model Content
[0006] The purpose of this utility model is to at least solve one of the technical defects described in the background art.
[0007] Therefore, one objective of this utility model is to propose a cable tray support arm for tunnels, which aims to solve the problem of poor stability of cable tray support arms for fixing columns in the prior art.
[0008] To achieve the above objectives, one embodiment of this utility model provides a tunnel cable tray support arm, including a mounting plate, a column fixedly mounted on one side of the mounting plate by two bolts, and a support arm fixedly mounted on one side of the column by two bolts. A fixing plate for fixing to the tunnel wall is fixedly connected to one side of the mounting plate. A positioning hole and multiple adjustment holes are opened on one side of the mounting plate. The center of the multiple adjustment holes does not coincide with the center of the positioning hole, and the included angle between two adjacent connecting lines is n°. A through hole and an elongated hole are opened on one side of the column. Two limiting plates are adjustablely installed on the top of the support arm.
[0009] The beneficial effects are as follows: by setting multiple adjustment holes on the mounting plate, and the lines connecting the centers of all adjustment holes and the centers of the positioning holes do not coincide, and the included angle between two adjacent lines is n°, the tilt angle of the column can be adjusted by changing the adjustment hole into which the bolt is inserted in the long hole. Moreover, the bolt will not slip after being inserted into the adjustment hole, so the stability of the column after fixing is reliable, thereby ensuring the stability of the cable tray support.
[0010] Furthermore, multiple adjustment slots are provided on one side of the column.
[0011] Furthermore, the support arm includes a support plate, a connecting plate is fixedly connected to one side of the support plate, and two insertion holes are opened on the side of the connecting plate. Bolts are inserted into the insertion holes, and the bolts pass through the adjustment slots and are connected to nuts, so that the support arm can be fixed on the column. The height of the support plate can be adjusted by inserting the two bolts into the two different adjustment slots.
[0012] Furthermore, the top of the support plate has two sliding grooves, and bolts are inserted into the two limiting plates. The bolts are slidably connected inside the sliding grooves. By sliding the two limiting plates, the distance between the two limiting plates can be adjusted. By connecting nuts to the threads on the surface of the bolts, the limiting plates can be fixed to the support plate.
[0013] In a preferred embodiment, the support arm further includes a support plate hinged to the top of the support plate, a threaded sleeve hinged to the bottom of the support plate, a bearing hinged inside the support plate, an adjusting screw fixedly connected inside the bearing, and the adjusting screw being threadedly connected inside the threaded sleeve.
[0014] The beneficial effects are as follows: by rotating the adjusting screw, one end of the lifting plate can be raised or lowered to adjust the tilt angle of the plate. In conjunction with multiple adjusting holes, stepless adjustment can be achieved, ensuring that the plate is parallel to the bottom surface of the cable tray, thereby improving the stability of the cable tray support.
[0015] Furthermore, the top of the pallet has two sliding grooves, and bolts are inserted into the two limiting plates. The bolts are slidably connected inside the sliding grooves, and square nuts are threaded onto the outer surface of the bolts.
[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0018] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present utility model.
[0019] Figure 2 This is a schematic diagram of the structure of the adjustment hole and the positioning hole on the mounting plate of this utility model, showing the line connecting their centers.
[0020] Figure 3 This is a schematic diagram of the structure of the column of this utility model.
[0021] Figure 4 This is a schematic diagram of the support arm in Embodiment 1 of this utility model.
[0022] Figure 5 This is a structural schematic diagram of Embodiment 2 of the present invention.
[0023] Figure 6 This is a schematic diagram of the support plate in Embodiment 2 of this utility model.
[0024] Figure 7 This is a schematic diagram of the tray structure in Embodiment 2 of this utility model.
[0025] The components are: 1. Mounting plate, 11. Fixing plate, 12. Positioning hole, 13. Adjustment hole, 2. Column, 21. Through hole, 22. Long hole, 23. Adjustment groove, 3. Support arm, 31. Support plate, 32. Connecting plate, 33. Insertion hole, 34. Slide groove, 35. Screw sleeve, 351. Notch, 36. Support plate, 361. Square nut, 37. Bearing, 38. Adjustment screw, 4. Limiting plate. Detailed Implementation
[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0028] This utility model provides a cable tray support arm for tunnels.
[0029] Example 1:
[0030] like Figure 1-4 As shown, it includes a mounting plate 1, a column 2, and a support arm 3. A fixing plate 11 for fixing to the tunnel wall is fixedly connected to one side of the mounting plate 1. The fixing plate 11 has mounting holes for inserting expansion bolts. The fixing plate 11 can be fixed to the tunnel wall using the expansion bolts. Figure 2 As shown, a positioning hole 12 and multiple adjustment holes 13 are provided on one side of the mounting plate 1. The center of the multiple adjustment holes 13 does not coincide with the center of the positioning hole 12, and the included angle between two adjacent connecting lines is 3°. A through hole 21 and an elongated hole 22 are provided on one side of the column 2. By using a bolt to pass through the through hole 21 and the positioning hole 12, and threading a nut on the surface of the bolt, the column 2 is hinged to the mounting plate 1. By rotating the column 2, the tilt angle of the column 2 can be adjusted. Then, by using a bolt to pass through the insertion hole 22 and one of the adjustment holes 13, and threading a nut on the surface of the bolt, the column 2 can be fixed to one side of the mounting plate 1 by the two bolts and nuts, thereby fixing the angle of the column 2. The minimum adjustment angle of the column 2 is 3°. Two limit plates 4 are adjustablely installed on the top of the support arm 3.
[0031] like Figure 3-4 As shown, a plurality of adjustment slots 23 are provided on one side of the column 2. The support arm 3 includes a support plate 31. A connecting plate 32 is fixedly connected to one side of the support plate 31. Two insertion holes 33 are provided on the side of the connecting plate 32. By using two bolts to pass through the insertion holes 33 and the adjustment slots 23 respectively, and attaching nuts to the bolt surfaces, the support arm 3 can be fixed to the column 2 by the two bolts.
[0032] Furthermore, such as Figure 1 and Figure 4As shown, the top of the support plate 31 has two sliding grooves 34, and bolts are inserted into the two limiting plates 4. The bolts are slidably connected inside the sliding grooves 34. The distance between the two limiting plates 4 can be adjusted by sliding, thereby clamping the two sides of the cable tray on the support plate 31. By threading nuts onto the surface of the bolts from below the support plate 31, the limiting plates 4 can be fixed on the support plate 31, thus fixing the cable tray.
[0033] The working principle of this embodiment is as follows:
[0034] S1. The support arm 3 is fixed to the column 2 by two bolts. The two limiting plates are installed on the support plate 31 by bolts and nuts. The column 2 is installed on the mounting plate 1 by a bolt through the through hole 21 and the positioning hole 12, and by a nut. This completes the assembly of the support arm.
[0035] S2. Drill holes in the tunnel wall, use expansion bolts to install the fixing plate 11 on the tunnel wall, and then rotate the column 2.
[0036] S3. Adjust the tilt angle of the support plate 3. After adjustment, use a bolt to pass through the long hole 22 and the adjustment hole 13, and connect a nut to the bolt surface to position the tilt angle of the support plate 3.
[0037] S4. Adjust the height of the support plate 31 by sliding the two bolts of the fixed support arm 3 up and down in the adjustment groove 23. After the adjustment is completed, tighten the nuts on the two bolts of the fixed support arm 3.
[0038] S5. Finally, place the cable tray on top of the support plate 31, slide the two limit plates 4 to clamp the cable tray, and then tighten the nuts.
[0039] Example 2:
[0040] like Figure 5-7 As shown, based on Embodiment 1, the support arm 3 further includes a support plate 36 hinged to the top of the support plate 31. The support plate 36 is U-shaped with its opening facing downwards. One end of the support plate 36 is hinged to the support plate 31, and the other end can be adjusted for height. A threaded sleeve 35 is hinged to the bottom of the support plate 31. A rotating shaft is fixedly connected to the outer surface of the outer ring of the bearing 37. The bearing 37 is hinged to the support plate 36 through the rotating shaft. An adjusting screw 38 is fixedly connected to the inner wall of the inner ring of the bearing 37. A notch 351 is opened on the support plate 31 at a position corresponding to the threaded sleeve 35. The adjusting screw 38 passes through the notch 351 and is threaded into the inside of the threaded sleeve 35. Therefore, by rotating the adjusting screw 38, one end of the support plate 36 can be raised or lowered to adjust the tilt angle of the support plate 36. This, combined with the multiple adjusting holes 13, can achieve stepless adjustment.
[0041] The difference from Embodiment 1 is that in Embodiment 2, two grooves 34 are formed on the top of the support plate 36, and bolts are inserted into the two limiting plates 4. The bolts are slidably connected inside the grooves 34, and square nuts 361 are threaded on the outer surface of the bolts. The square nuts 361 are located inside the U-shaped support plate 36. The two side walls of the support plate 36 can limit the square nuts 361 to prevent them from rotating. Thus, the limiting plates 4 can be fixed by simply rotating the bolts.
[0042] The working principle of this embodiment is as follows: When using it, after completing steps S1-S3 in Embodiment 1, the tilt angle of the support plate 36 is adjusted again by rotating the adjusting screw 38 to ensure that the support plate 36 is parallel to the bottom surface of the cable tray. Then, step S4 in Embodiment 1 is performed. Finally, the cable tray is placed on top of the support plate 36, the sliding limiting plate 4 is slid to clamp the cable tray with the two limiting plates 4, and then the bolts are tightened to fix the limiting plate 4.
Claims
1. A tunnel cable tray support arm, comprising a mounting plate (1), a column (2) fixedly mounted on one side of the mounting plate (1) by two bolts, and a support arm (3) fixedly mounted on one side of the column (2) by two bolts, characterized in that, The mounting plate (1) is fixedly connected to a fixing plate (11) for fixing to the tunnel wall on one side. The mounting plate (1) has a positioning hole (12) and multiple adjustment holes (13) on one side. The center of the multiple adjustment holes (13) does not coincide with the center of the positioning hole (12), and the included angle between two adjacent connecting lines is n°. The column (2) has a through hole (21) and a long hole (22) on one side. The top of the support arm (3) can be adjusted to install two limiting plates (4).
2. The tunnel cable tray support arm according to claim 1, characterized in that, Multiple adjustment slots (23) are provided on one side of the column (2).
3. The tunnel cable tray support arm according to claim 2, characterized in that, The support arm (3) includes a support plate (31), and a connecting plate (32) is fixedly connected to one side of the support plate (31). Two insertion holes (33) are opened on the side of the connecting plate (32).
4. The tunnel cable tray support arm according to claim 3, characterized in that, The top of the support plate (31) has two sliding grooves (34), and bolts are inserted into the two limiting plates (4), and the bolts are slidably connected inside the sliding grooves (34).
5. The tunnel cable tray support arm according to claim 3, characterized in that, The support arm (3) also includes a support plate (36) hinged to the top of the support plate (31). A threaded sleeve (35) is hinged to the bottom of the support plate (31). A bearing (37) is hinged inside the support plate (36). An adjusting screw (38) is fixedly connected inside the bearing (37), and the adjusting screw (38) is threaded inside the threaded sleeve (35).
6. The tunnel cable tray support arm according to claim 5, characterized in that, The top of the tray (36) has two grooves (34), and bolts are inserted into the two limiting plates (4). The bolts are slidably connected inside the grooves (34), and a square nut (361) is threaded onto the outer surface of the bolts.