Connecting box fixing support applied in subway circular tunnel shield seam

Abstract

The utility model discloses a connecting box fixing support applied in a subway circular tunnel shield seam, which comprises a support plate, a pair of first expansion anchor bolts are arranged on the support plate, and the size of the support plate is matched with that of the shield seam; the mounting frame is arranged at the ends, away from the supporting plate, of the pair of first expansion anchor bolts; and the fixing piece is arranged on the mounting frame and is used for fixing the connection box. Compared with the prior art, the tunnel shield seam fixing device has the advantages of being convenient to install, simple in structure, reasonable in design, capable of being disassembled and assembled, capable of being stably, safely and attractively installed in a tunnel shield seam, not only avoiding the defects that fixation is not firm enough, the overall attractiveness of a tunnel is affected and the like, but also guaranteeing the function that holes are not punched in the tunnel wall to protect the wall body of the tunnel wall.

Description

Technical Field

[0001] This utility model relates to the technical field of fixing fiber optic cable splice boxes in the field of low-voltage electrical engineering for rail transit. More specifically, this utility model relates to a splice box fixing bracket used in the shield joint of a circular subway tunnel. Background Technology

[0002] In the construction of fiber optic cable splices for low-voltage electrical systems in rail transit, fiber optic cable splice boxes (also known as signal cable splice boxes) are required to connect and protect fiber optic and electrical cables. Currently, the commonly used method for fixing these splice boxes is to drill holes in the tunnel wall using expansion screws or wood screws with expansion tubes. However, this method has drawbacks such as insufficient stability and affecting the overall aesthetics of the tunnel. Furthermore, in some construction sites, such as Jinan, where there are many underground springs, it is necessary to consider the requirement to avoid drilling holes in the tunnel walls in circular shield tunnel sections of subways. Therefore, under the premise of addressing the above drawbacks and construction requirements, the key is to develop a splice box fixing bracket applicable to the shield joints of circular subway tunnels, ensuring that the fiber optic cable splice boxes are installed firmly and aesthetically on the tunnel wall, solving practical construction problems, and improving the quality of the process and appearance. Utility Model Content

[0003] One objective of this utility model is to solve at least the above-mentioned problems and provide a joint box fixing bracket applicable to the shield joint of a circular subway tunnel. It is easy to install, has a simple structure, reasonable design, and can be disassembled and assembled. It can be installed stably, safely and aesthetically in the shield joint of the tunnel. It not only avoids the drawbacks of insufficient fixing and affecting the overall aesthetics of the tunnel, but also ensures the function of protecting the tunnel wall without drilling holes in the tunnel wall.

[0004] To achieve these objectives and other advantages according to this utility model, a joint box fixing bracket for use in the shield joint of a circular subway tunnel is provided, comprising:

[0005] A support plate, on which a pair of first expansion anchors are provided, the size of which is adapted to the shield tunnel joint;

[0006] The mounting bracket is located at the end of a pair of first expansion anchors away from the support plate;

[0007] A fastener is provided on the mounting bracket to secure the junction box.

[0008] Preferably, the support plate is further provided with a pair of second expansion anchors, which are respectively disposed on both sides of a pair of first expansion anchors. The end of the sleeve of the first expansion anchor away from the support plate is higher than the end of the sleeve of the second expansion anchor away from the support plate.

[0009] Preferably, the mounting bracket is a frame plate, and the frame plate has a pair of first mounting holes at the middle of both ends along its width direction, corresponding to a pair of first expansion bolts.

[0010] Preferably, a pair of second mounting holes are respectively provided on both ends of the frame plate along its length direction; the fastener includes a pair of clamps and two pairs of locking nuts, a pair of clamps corresponds to a pair of second mounting holes, both ends of the clamps extend into the corresponding second mounting holes, both ends of the clamps are provided with threads, a pair of threads corresponds to a pair of locking nuts, and the locking nuts are screwed onto the corresponding threads;

[0011] The splice box is cylindrical in shape, and the clamp is adapted to the splice box to fix the splice box on the mounting frame.

[0012] Preferably, the frame plate has a pair of spare holes at each end along its length, with each pair of spare holes located on both sides of the corresponding second mounting hole.

[0013] Preferably, a pair of sliders are slidably provided at each end of the frame plate along its length direction. The pair of sliders slide along the width direction of the frame plate. Clamping plates are respectively provided on the surface of the pair of sliders away from the support plate. Fixing holes are provided on the upper part of the clamping plates. Connecting bolts are passed through the pair of fixing holes. A connecting box clamping space is formed between the pair of clamping plates.

[0014] This utility model has at least the following beneficial effects:

[0015] By setting up a support plate, a first expansion anchor bolt, a mounting bracket, and fasteners, a structure for fixing optical cable junction boxes is provided. It is easy to install, simple in structure, reasonable in design, and can be disassembled and assembled. It can be installed stably, safely, and aesthetically in the tunnel shield joint. It not only avoids the drawbacks of insufficient fixing and affecting the overall aesthetics of the tunnel, but also ensures the function of protecting the tunnel wall without drilling holes in the tunnel wall.

[0016] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the splice box fixing bracket used in the shield joint of a circular subway tunnel according to one of the technical solutions of this utility model.

[0018] Figure 2 This is a schematic diagram of the mounting bracket according to one of the technical solutions of this utility model;

[0019] Figure 3This is a schematic diagram of the structure of the clamp and locking nut according to one of the technical solutions of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the support plate and the first and second expansion anchors on it according to one of the technical solutions of this utility model;

[0021] Figure 5 This is a top view schematic diagram of the structure of the splice box fixing bracket applied in the shield joint of a circular subway tunnel, according to one of the technical solutions of this utility model.

[0022] Reference numerals in the attached drawings: 1-Support plate; 2-First expansion anchor bolt; 3-Mounting bracket; 4-Clamping clamp; 5-Connection box; 6-Second expansion anchor bolt; 7-Slider; 8-Clamping plate; 10-Spare hole; 11-First mounting hole; 12-Second mounting hole; 13-Locking nut; 14-Connecting bolt. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0024] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0025] like Figure 1-5 As shown, this utility model provides a joint box fixing bracket for use in the shield joint of a circular subway tunnel, comprising:

[0026] Support plate 1, on which a pair of first expansion anchors 2 are provided, the size of support plate 1 being adapted to the shield tunnel joint;

[0027] Mounting bracket 3 is located at one end of a pair of first expansion anchors 2 away from the support plate 1;

[0028] A fastener is provided on the mounting bracket 3 to fix the connector box 5;

[0029] In the above technical solution, the shield joint of the subway circular tunnel refers to the gap between two adjacent segments; the size of the support plate 1 is adapted to the size of the shield joint so that the support plate 1 can be embedded in the shield joint for easy subsequent installation; a pair of first expansion anchors 2 are provided on the support plate 1, and the end of the first expansion anchor 2 away from its expansion end (that is, the end away from the support plate 1) extends out of the shield joint for operation and installation by workers; the mounting frame 3 is fixed on the protruding ends of the pair of first expansion anchors 2, and the fastener is provided on the mounting frame 3 to fix the splice box 5. The fastener can take many forms and can be adapted to the shape or type of the splice box 5 used in actual use, and no further limitations are made here;

[0030] In this technical solution, during use, the support plate 1 is first inserted into the shield gap, so that the ends of the pair of first expansion anchors 2 away from the support plate 1 are outside the shield gap. Then, the nuts on the first expansion anchors 2 are rotated to make the expansion ends of the first expansion anchors 2 locked in the shield gap, so that the support plate 1 and the pair of first expansion anchors 2 can be stably installed on the shield gap (in actual use, the support plate 1 is installed at a position more than one meter away from the rail plane). Then, the mounting bracket 3 with fixing parts is installed on the pair of first expansion anchors 2 in the form of screw connection (the protruding ends of the pair of first expansion anchors 2 are the screw connection ends). Then, the optical cables that need to be connected are connected, ensuring that the optical cable splice box 5 is roughly located near the shield gap. After connecting and applying glue, the fully connected optical cable splice box 5 is installed on the mounting bracket 3 with fixing parts.

[0031] The beneficial effects of adopting this technical solution are that by setting up the support plate 1, the first expansion anchor bolt 2, the mounting frame 3, and the fixing parts, a structure for fixing the optical cable splice box 5 is provided. It is easy to install, simple in structure, reasonable in design, and can be disassembled and assembled. It can be installed stably, safely and aesthetically in the tunnel shield joint. It not only avoids the drawbacks of insufficient fixing and affecting the overall aesthetics of the tunnel, but also ensures the function of protecting the tunnel wall without drilling holes in the tunnel wall.

[0032] In another technical solution, the support plate 1 is further provided with a pair of second expansion anchors 6, which are respectively located on both sides of a pair of first expansion anchors 2. The end of the sleeve of the first expansion anchor 2 away from the support plate 1 is higher than the end of the sleeve of the second expansion anchor 6 away from the support plate 1. Specifically, in use, after the support plate 1 is embedded in the shield tunnel joint, the support plate 1 is installed in the shield tunnel joint by the pair of second expansion anchors 6. At this time, the end of the sleeve of the first expansion anchor 2 away from the support plate 1 is located outside the shield tunnel joint, and There is a certain distance between the support plate 1 and the shield joint. At this time, the mounting frame 3 is installed on the protruding end of a pair of first expansion anchors 2 (at this time, the pair of first expansion anchors 2 do not need to be clamped in the shield joint), which facilitates the installation of the splice box 5. The beneficial effect of adopting this technical solution is that by setting a pair of second expansion anchors 6, on the one hand, the support plate 1 can be fixed in the shield joint, and on the other hand, the mounting frame 3 can be set at a certain distance from the shield joint, which facilitates manual operation of the splice box 5 (expanding the operating space and facilitating the installation operation).

[0033] In another technical solution, the mounting bracket 3 is a frame plate, and a pair of first mounting holes 11 corresponding to a pair of first expansion bolts are opened at the middle of both ends of the frame plate along its width direction; specifically, the mounting bracket 3 is frame plate shaped, i.e., a frame plate; the frame plate has first mounting holes 11 at the middle of both ends of its width direction, and a pair of first mounting holes 11 correspond to a pair of first expansion bolts, so that the end of the first expansion bolt away from the support plate 1 passes through and is fixed by screwing in a nut, ultimately causing the mounting bracket 3 to be installed on a pair of first expansion bolts; the beneficial effect of adopting this technical solution is that by setting the mounting bracket 3 as a frame plate, it is convenient to install the mounting bracket 3 and the fasteners.

[0034] In another technical solution, a pair of second mounting holes 12 are respectively opened at both ends of the frame plate along its length direction; the fastener includes a pair of clamps 4 and two pairs of locking nuts 13, a pair of clamps 4 corresponding to a pair of second mounting holes 12, both ends of the clamps 4 extending into the corresponding second mounting holes 12, and both ends of the clamps 4 are provided with threads, a pair of threads corresponding to a pair of locking nuts 13, and the locking nuts 13 are screwed onto the corresponding threads; the connecting box 5 is cylindrical, and the clamps 4 are adapted to the connecting box 5 to fix the connecting box 5 on the mounting bracket 3;

[0035] In the above technical solution, specifically, a pair of second mounting holes 12 are respectively opened at both ends of the frame plate along its length direction. The fixing component includes a pair of clamps 4 and a pair of locking nuts 13. The pair of clamps 4, the two pairs of locking nuts 13, and the two pairs of mounting holes correspond one-to-one. The two ends of the clamps 4 in the same direction are provided with external threads, which match the corresponding locking nuts 13. In use, the connecting box 5 is cylindrical. After fixing the frame plate to a pair of first expansion anchors 2, the connecting box 5 is... The connector 5 is placed on the frame plate, and a pair of second mounting holes 12 are respectively located on both sides of the connector 5. After the two ends of the clamp 4 in the same direction pass through the corresponding pair of second mounting holes 12, they are locked with the corresponding locking nuts 13. At this time, the connector 5 can be firmly fixed on the frame plate. The beneficial effect of adopting this technical solution is that by designing a pair of second mounting holes 12, a pair of clamps 4, and two pairs of locking nuts 13, a fixing structure for fixing a cylindrical connector 5 is provided, which has a good fixing effect and is easy to install and remove.

[0036] In another technical solution, a pair of spare holes 10 are provided at both ends of the frame plate along its length, and each pair of spare holes 10 is located on both sides of the corresponding second mounting hole 12. The beneficial effect of adopting this technical solution is that by designing spare holes 10, it can be used to accommodate different specifications of junction boxes 5, thereby expanding the applicability of this device.

[0037] In another technical solution, a pair of sliders 7 are slidably provided at each end of the frame plate along its length direction. The pair of sliders 7 slide along the width direction of the frame plate. Clamping plates 8 are respectively provided on the surfaces of the pair of sliders 7 away from the support plate 1. Fixing holes are provided on the upper part of the clamping plates 8, and connecting bolts 14 pass through the pair of fixing holes. A connecting box 5 clamping space is formed between the pair of clamping plates 8; specifically, as shown... Figure 5 As shown, each end of the frame plate along its length is provided with a pair of opposing sliders 7. The pair of sliders 7 slides along the width direction of the frame plate. Each slider 7 has a clamping plate 8 at the end away from its sliding end (i.e., away from the support plate 1). The pair of clamping plates 8 corresponding to the pair of sliders 7 are provided with fixing holes. Connecting bolts 14 pass through the pair of fixing holes. A space for clamping the connector box 5 is formed between the pair of clamping plates 8 for clamping the connector box 5. In use, the connector box 5 is placed in the space for clamping the connector box 5, and then the pair of sliders 7 are slid to make the pair of clamping plates 8 fit against the connector box 5. Then, the connecting bolts 14 are passed through the pair of fixing holes and locked by screwing nuts on both ends of the connecting bolts 14. Finally, the connector box 5 is fixed on the two pairs of clamping plates 8. The beneficial effect of this technical solution is that by setting a pair of sliders 7, clamping plates 8, fixing holes, and connecting bolts 14, connector boxes 5 of different sizes (such as different widths and different diameters) can be fixed, which improves the applicability of this device.

[0038] The number of devices and processing scale described herein are for simplification. Applications, modifications, and variations of this invention in the splice box fixing bracket within the shield joint of a circular subway tunnel will be readily apparent to those skilled in the art.

[0039] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A fixing bracket for a splice box used in the shield joint of a circular subway tunnel, characterized in that, include: A support plate, on which a pair of first expansion anchors are provided, the size of which is adapted to the shield tunnel joint; The mounting bracket is located at the end of a pair of first expansion anchors away from the support plate; A fastener is provided on the mounting bracket to secure the junction box.

2. The splice box fixing bracket applied in the shield joint of a circular subway tunnel as described in claim 1, characterized in that, The support plate is also provided with a pair of second expansion anchors, which are respectively located on both sides of a pair of first expansion anchors. The end of the sleeve of the first expansion anchor that is away from the support plate is higher than the end of the sleeve of the second expansion anchor that is away from the support plate.

3. The splice box fixing bracket applied in the shield joint of a circular subway tunnel as described in claim 2, characterized in that, The mounting bracket is a frame plate, and the frame plate has a pair of first mounting holes at the middle of both ends along its width direction, corresponding to a pair of first expansion bolts.

4. The splice box fixing bracket applied in the shield joint of a circular subway tunnel as described in claim 3, characterized in that, The frame plate has a pair of second mounting holes at both ends along its length; the fastener includes a pair of clamps and two pairs of locking nuts, a pair of clamps corresponds to a pair of second mounting holes, the two ends of the clamps extend into the corresponding second mounting holes, both ends of the clamps are threaded, a pair of threads corresponds to a pair of locking nuts, and the locking nuts are screwed onto the corresponding threads. The splice box is cylindrical in shape, and the clamp is adapted to the splice box to fix the splice box on the mounting frame.

5. The splice box fixing bracket applied in the shield joint of a circular subway tunnel as described in claim 4, characterized in that, The frame plate has a pair of spare holes at each end along its length, with each pair of spare holes located on both sides of the corresponding second mounting hole.

6. The splice box fixing bracket applied in the shield joint of a circular subway tunnel as described in claim 3, characterized in that, Along the length of the frame plate, a pair of sliders are slidably provided at each end. The pair of sliders slide along the width of the frame plate. Clamping plates are respectively provided on the surface of the pair of sliders away from the support plate. Fixing holes are provided on the upper part of the clamping plates. Connecting bolts are passed through the pair of fixing holes. A connecting box clamping space is formed between the pair of clamping plates.

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