A high voltage cable suspension protection device

Abstract

The utility model belongs to the urban underground engineering construction technical field especially, and it is a kind of high tension cable suspension protection device, including interlock pile enclosure wall and double -deck high tension cable, the top of interlock pile enclosure wall is equipped with the bearing groove, and the support frame that straddles foundation pit is equipped in bearing groove;It further includes the upper layer suspension unit and lower layer suspension unit of same structure, and all include the U type support frame of symmetrical setting, and the top of U type support frame is equipped with two cross laminated L type suspension seat, and the outer end of U type support frame of lower layer suspension unit is rotatably connected with two symmetrical setting cable-stayed damping rod through lifting lug, and the damping device that dished spring and friction plate are equipped in cable-stayed damping rod. The device realizes layering independent protection through double -deck suspension unit, and provides active swing control through cable-stayed damping rod, effectively solve the problem that present technology cannot control double -deck cable respectively and lack of damping control function, improve the security and reliability of double -deck high tension cable crossing protection.

Description

Technical Field

[0001] This utility model belongs to the field of urban underground engineering construction technology, and in particular relates to a high-voltage cable suspension protection device. Background Technology

[0002] With the rapid development of urban infrastructure construction, the development and utilization of underground space is becoming increasingly frequent. In the construction of urban underpasses, subway stations, and underground utility tunnels, the problem of spatial conflicts between existing underground pipelines and new projects is often encountered. In particular, when important pipelines such as high-voltage cables and communication optical cables cross the foundation pit construction area, how to smoothly carry out foundation pit excavation and structural construction while ensuring the safety of pipelines has become a major technical challenge in engineering construction.

[0003] Existing high-voltage cable crossing protection devices mainly achieve protection by setting up a support structure under the cable or by using suspension. However, when dealing with double-layered multi-cable systems, there is a lack of effective layered independent protection mechanisms. Moreover, when the cable is subjected to dynamic loads such as construction vibrations and wind loads, it is prone to swaying in the suspended state, which increases safety risks. Utility Model Content In view of the technical problems existing in the background art, this utility model provides a high-voltage cable suspension protection device.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows: A high-voltage cable suspension protection device includes a retaining wall with interlocking piles and a double-layered high-voltage cable. The top of the retaining wall with interlocking piles is provided with a bearing groove, and a support frame spanning the foundation pit is provided in the bearing groove. It also includes an upper suspension unit and a lower suspension unit with the same structure. Both the upper suspension unit and the lower suspension unit include symmetrically arranged U-shaped support frames. The top of the U-shaped support frame is provided with two cross-stacked L-shaped suspension seats. Each L-shaped suspension seat has two symmetrically arranged rectangular through holes. Several load-bearing components are slidably connected in the rectangular through holes. The outer end of the U-shaped support frame of the lower suspension unit is rotatably connected to two symmetrically arranged inclined damping rods via lifting lugs. The inclined damping rods have a damping function to limit the swing amplitude of the suspension unit. The other end of the inclined damping rods is rotatably connected to the support frame.

[0005] Optionally, the load-bearing component includes a cable seat that is slidably connected to a rectangular through hole. The top of the cable seat is fixedly connected to a plurality of radially distributed load-bearing ribs. The top of the load-bearing ribs is fixedly connected to an arc-shaped plate. The curvature of the arc-shaped plate is adapted to the outer diameter of the high-voltage cable. An insulating pad is fixedly connected to the inner wall of the arc-shaped plate. The insulating pad is in contact with the outer wall of the high-voltage cable.

[0006] Optionally, the upper suspension unit and the lower suspension unit are connected by several suspension bolts. The upper suspension unit is positioned and supported by the limiting nuts on the suspension bolts. The suspension bolts pass through the U-shaped support frame and the L-shaped suspension seat in sequence and are fixedly connected to the support frame. The outer end of the L-shaped suspension seat is clamped with a protective plate.

[0007] Optionally, the support frame includes several transverse main beams arranged at equal intervals along the length of the foundation pit. Both ends of the transverse main beams are welded with connecting plates, and the connecting plates are fixedly connected to the horizontal bearing surface of the bearing groove by fastening bolts.

[0008] Optionally, several pairs of equally spaced distribution beams are fixedly connected between two adjacent transverse main beams. Each pair of distribution beams is connected by a T-shaped connector, and several support channel steels are fixedly connected between two adjacent pairs of T-shaped connectors. The suspension bolts pass through the support channel steels and are fixedly connected to the support channel steels by nuts.

[0009] Optionally, the inclined damping rod includes a first adjusting lug that is rotatably connected to the outer end lug of the U-shaped support frame. The inner end of the first adjusting lug is threaded with a connecting rod, and the end of the connecting rod away from the first adjusting lug is fixedly connected with a connecting sleeve.

[0010] Optionally, the inner wall of the connecting sleeve is slidably connected to two axially divided damping cylinders, and the inner wall of each damping cylinder is fixedly connected to several retaining rings distributed at equal intervals along the axial direction.

[0011] Optionally, a damping rod is slidably connected to the inner wall of the retaining ring, and several friction plates are fixedly connected to the outer wall of the damping rod at equal intervals along the axial direction. Several disc spring assemblies are slidably connected to the outer wall of the damping rod at equal intervals along the axial direction. The high end of the disc spring assembly abuts against the retaining ring, and the low end of the disc spring assembly abuts against the friction plates. The friction plates and the inner wall of the damping cylinder form a friction pair.

[0012] Optionally, the end of the damping rod away from the connecting rod is threadedly connected to a second adjusting lug, which is rotatably connected to the T-shaped connector via a lifting lug, and the outer end of the connecting sleeve is threadedly connected to an end cap.

[0013] This utility model has the following advantages and beneficial effects: In this invention, the suspension protection device uses an upper suspension unit and a lower suspension unit with identical structures to provide independent layered protection for double-layer high-voltage cables, effectively solving the problem of the lack of independent layered protection in the prior art. The inclined damping rod provides active swing control through a damping device composed of disc springs and friction plates, achieving stable and reliable damping limitation. This solves the problems of static support lacking damping control function and cable swing increasing safety risks, thus improving the safety and reliability of double-layer high-voltage cable crossing protection. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the overall structure of the high-voltage cable suspension protection device of this utility model; Figure 2 This is a top view of the high-voltage cable suspension protection device of this utility model; Figure 3 This utility model Figure 2 A cross-sectional view along the AA direction; Figure 4 This utility model Figure 3 A magnified view of a section at point B in the middle; Figure 5 This is a structural diagram of the inclined damping rod of this utility model; Figure 6 This is a partial view of the high-voltage cable suspension protection device of this utility model; Figure 7 This is a structural diagram of the support frame of this utility model; Figure 8 This is a structural diagram of the load-bearing component of this utility model; Figure 9 This is a structural diagram of the suspension unit of this utility model.

[0015] Reference numerals: 1. Interlocking pile retaining wall; 2. High-voltage cable; 3. Bearing groove; 4. U-shaped support frame; 5. L-shaped suspension seat; 6. Rectangular through hole; 7. Cable seat; 8. Bearing stiffener plate; 9. Arc plate; 10. Insulating pad; 11. Diagonal damping rod; 12. Suspension screw; 13. Limiting nut; 14. Transverse main beam; 15. Distribution beam; 16. T-shaped connector; 17. Support channel steel; 18. First adjusting ear; 19. Connecting rod; 20. Connecting sleeve; 21. Damping cylinder; 22. Snap ring; 23. Damping rod; 24. Friction plate; 25. Disc spring assembly; 26. Second adjusting ear; 27. End cap. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0018] Example like Figure 1 - Figure 3As shown, a high-voltage cable suspension protection device includes an interlocking pile retaining wall 1, a double-layered high-voltage cable 2, a bearing groove 3, and a support frame spanning the foundation pit. The interlocking pile retaining wall 1 serves as the foundation pit retaining structure, and its top is provided with an L-shaped bearing groove 3 for installing the support frame.

[0019] like Figure 1 and Figure 7 As shown, the support frame is a steel structure, including several transverse main beams 14 arranged at equal intervals along the length of the foundation pit. The transverse main beams 14 are made of H-beams and have connecting plates welded to both ends. The connecting plates are fixedly connected to the horizontal bearing surface of the bearing groove 3 by high-strength fastening bolts to form a stable support foundation. At the same time, the main beams 14 offset the horizontal loads on the interlocking pile retaining wall 1 by the transverse support force, such as soil pressure and groundwater pressure.

[0020] Several pairs of equally spaced distribution beams 15 are fixedly connected between two adjacent transverse main beams 14. The distribution beams 15 are made of H-beams. Each pair of distribution beams 15 is connected by a T-shaped connector 16. The T-shaped connector 16 is made of cast steel and has good load-bearing capacity. Several support channel steels 17 are fixedly connected between two adjacent pairs of T-shaped connectors 16. The support channel steels 17 provide lateral support for the entire suspension system. This support frame optimizes the load transmission path through grid design, so that the load generated by the cable is evenly distributed and effectively avoids local overload.

[0021] like Figure 3 - Figure 4 and Figure 7 - Figure 8 As shown, the suspension system includes an upper suspension unit and a lower suspension unit with identical structures, used to suspend the double-layer high-voltage cable 2. Both the upper and lower suspension units include symmetrically arranged U-shaped support frames 4. The U-shaped support frames 4 are made of high-strength steel and have good load-bearing capacity and rigidity.

[0022] The top of the U-shaped support frame 4 is provided with two cross-layered L-shaped suspension seats 5. Each L-shaped suspension seat 5 has two symmetrically arranged rectangular through holes 6. Several load-bearing components are slidably connected in the rectangular through holes 6. For double-layer high-voltage cables 2, when the surrounding fine sand or soft soil layer is removed, they are easy to bend and overlap, and the space between layers is small, making it difficult to install them in layers. However, when installing the cross-arranged L-shaped suspension seats 5, several load-bearing components can be pre-inserted into the rectangular through hole 6 of one of the L-shaped suspension seats 5. The whole assembly is then inserted from the side of the two layers of high-voltage cables 2. After it is in place, another L-shaped suspension seat 5 is inserted from the side, and the lower suspension unit is installed in the same way.

[0023] The upper and lower suspension units are connected by several suspension bolts 12. The suspension bolts 12 are high-strength bolts. The upper suspension unit is precisely positioned and supported by the limiting nuts 13 on the suspension bolts 12, ensuring the relative position stability of the upper and lower suspension units. The outer end of the L-shaped suspension seat 5 is clamped with a protective plate, which serves as a safety protection to prevent construction personnel from accidentally touching the cable. After the upper and lower suspension units are installed and connected in the above manner, the suspension bolts 12 without screw heads can be used to pass through the support channel steel 17, the protective plate, the L-shaped suspension seat 5, and the U-shaped support frame 4 from top to bottom, and are fixed at the bottom with nuts. Alternatively, depending on the site conditions, the suspension bolts 12 with screw heads can be passed through from bottom to top and finally fixedly connected to the support channel steel 17. After the suspension bolts 12 pass through the support channel steel 17, they are fixedly connected to the support channel steel 17 with nuts to form a complete suspension system.

[0024] like Figure 8 - Figure 9 As shown, the load-bearing component includes several cable seats 7 that are slidably connected to the rectangular through hole 6. The cable seats 7 can be slidably adjusted along the rectangular through hole 6 to adapt to different cable spacings. Several radially distributed load-bearing ribs 8 are fixedly connected to the top of the cable seats 7. The load-bearing ribs 8 are made of steel plates and are distributed in a fan shape. An arc plate 9 is fixedly connected to the top of the load-bearing ribs 8. The curvature of the arc plate 9 is adapted to the outer diameter of the high-voltage cable 2 to ensure stable load bearing of the cable.

[0025] An insulating pad 10 is fixedly connected to the inner wall of the arc plate 9. The insulating pad 10 is made of high-polymer insulating material, which has good insulation performance and weather resistance. The insulating pad 10 is directly attached to the outer wall of the high-voltage cable 2 to provide electrical insulation protection and prevent electrical accidents during construction.

[0026] like Figure 3 - Figure 6 As shown, the outer end of the U-shaped support frame 4 of the lower suspension unit is rotatably connected to two symmetrically arranged inclined damping rods 11 through the lifting lugs. The inclined damping rods 11 have three functions: load sharing, swing limit and damping energy dissipation.

[0027] The inclined damping rod 11 includes a first adjusting ear 18 that is rotatably connected to the outer end lug of the U-shaped support frame 4. The first adjusting ear 18 is rotatably connected to the lug by a pin, allowing free rotation. The inner end of the first adjusting ear 18 is threaded with a connecting rod 19, and the distance and preload can be adjusted by rotating the connecting rod 19. The end of the connecting rod 19 away from the first adjusting ear 18 is fixedly connected to a connecting sleeve 20, which is a cylindrical structure that houses the damping device inside.

[0028] The inner wall of the connecting sleeve 20 is slidably connected to two axially divided damping cylinders 21. The damping cylinders 21 adopt a split design for easy assembly. Each damping cylinder 21 consists of two half-cylinders, which are connected and fixed by the connecting sleeve 20. The inner wall of each damping cylinder 21 is fixedly connected to several axially equally spaced retaining rings 22. The retaining rings 22 also adopt a split structure, consisting of two half-rings, for easy installation.

[0029] The inner wall of the retaining ring 22 is slidably connected to a damping rod 23, which is a circular cross-section steel rod. The outer wall of the damping rod 23 is fixedly connected to several friction plates 24 distributed at equal intervals along the axial direction. The friction plates 24 are made of alumina ceramic material, which has excellent wear resistance and a stable coefficient of friction. The friction plates 24 are rigidly connected to the damping rod 23.

[0030] The outer wall of the damping rod 23 is slidably connected with several disc spring groups 25 distributed at equal intervals along the axial direction. The disc spring groups 25 are made of high-strength spring steel. The high end of the disc spring group 25 abuts against the retaining ring 22, and the low end of the disc spring group 25 abuts against the friction plate 24. When the high-voltage cable 2 swings due to wind load and mechanical vibration, the inclined damping rod 11 on one side provides high damping force, and the other side provides low damping force, which can effectively limit the swing amplitude of the cable.

[0031] When the high-voltage cable 2 is stationary, it is in a vertically suspended equilibrium position. The double inclined damping rod 11 exhibits a symmetrical mechanical state. The weight of the high-voltage cable 2 is evenly transmitted to the left and right damping cylinders 21 through the suspension assembly. Each damping cylinder 21 bears an equal load. Under the load of the high-voltage cable 2, the retaining ring 22 on the inner wall of the damping cylinder 21 applies a predetermined compressive force to multiple disc spring groups 25, so that each disc spring group is in a pre-compressed state. At this time, the disc spring group 25 stores a certain elastic potential energy, and due to the internal damping characteristics of the disc spring material, it has the ability to dissipate small vibration energy even when stationary.

[0032] The end of the damping rod 23 away from the connecting rod 19 is threadedly connected to a second adjusting lug 26. The second adjusting lug 26 is rotatably connected to the T-shaped connector 16 via a lifting lug. The outer end of the connecting sleeve 20 is threadedly connected to an end cap 27. The end cap 27 connects the connecting sleeve 20 and the damping cylinder 21 together, preventing the damping cylinder 21 from sliding out of the connecting sleeve 20. The inclined damping rod 11 and the support frame form an inclined support structure, which together with the suspension screw 12 bears the weight of the cable.

[0033] When the high-voltage cable 2 swings to the left, the left damping cylinder 21 moves upward relative to the fixed damping rod 23. The relative position between the retaining ring 22 and the disc spring assembly 25 inside the damping cylinder 21 changes, and the compressive force of the retaining ring 22 on the disc spring assembly 25 decreases. During the upward movement of the sleeve, the friction plate 24 slides relative to the inner wall of the damping cylinder 21, and the sliding friction dissipates part of the swing energy. At the same time, the right damping cylinder 21 moves downward, and the retaining ring 22 further compresses the right disc spring assembly 25, causing it to change from a pre-compression state to a higher compression state. During this compression process, the disc spring assembly 25 absorbs more elastic potential energy, and because... As the compression deformation increases, the internal damping effect of the disc spring material also increases accordingly. When the right sleeve moves down, the relative sliding between the friction plate 24 and the inner wall of the damping cylinder 21 dissipates energy through sliding friction. During the entire left swing, the compression of the left rod disc spring group 25 decreases and the compression of the right rod disc spring group 25 increases. The differential response on both sides forms an asymmetrical damping effect, which together suppresses the swing of the high-voltage cable 2. Conversely, when the high-voltage cable 2 swings to the right, the states of the left and right inclined damping rods 11 are exactly opposite. When the cable stops swinging, the left and right inclined damping rods 11 return to their initial positions under the action of elastic potential energy and the load of the high-voltage cable 2.

[0034] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-voltage cable suspension protection device, comprising a retaining wall with interlocking piles (1) and a double-layered high-voltage cable (2), wherein the top of the retaining wall with interlocking piles (1) is provided with a bearing groove (3), characterized in that: The bearing groove (3) is provided with a support frame that spans the foundation pit; It also includes an upper suspension unit and a lower suspension unit with the same structure. Both the upper suspension unit and the lower suspension unit include a symmetrically arranged U-shaped support frame (4). The top of the U-shaped support frame (4) is provided with two cross-stacked L-shaped suspension seats (5). Each L-shaped suspension seat (5) has two symmetrically arranged rectangular through holes (6) inside. Several load-bearing components are slidably connected in the rectangular through holes (6). The outer end of the U-shaped support frame (4) of the lower suspension unit is rotatably connected to two symmetrically arranged inclined damping rods (11) through the lugs. The inclined damping rods (11) have a damping function to limit the swing amplitude of the suspension unit. The other end of the inclined damping rods (11) is rotatably connected to the support frame.

2. The high-voltage cable suspension protection device according to claim 1, characterized in that: The load-bearing component includes a cable seat (7) that is slidably connected to a rectangular through hole (6). The top of the cable seat (7) is fixedly connected to a plurality of radially distributed load-bearing ribs (8). The top of the load-bearing ribs (8) is fixedly connected to an arc plate (9). The arc of the arc plate (9) is adapted to the outer diameter of the high-voltage cable (2). An insulating pad (10) is fixedly connected to the inner wall of the arc plate (9). The insulating pad (10) is in contact with the outer wall of the high-voltage cable (2).

3. The high-voltage cable suspension protection device according to claim 1, characterized in that: The upper suspension unit and the lower suspension unit are connected by several suspension screws (12). The upper suspension unit is positioned and supported by the limiting nut (13) on the suspension screw (12). The suspension screw (12) passes through the U-shaped support frame (4) and the L-shaped suspension seat (5) in sequence and is fixedly connected to the support frame. The outer end of the L-shaped suspension seat (5) is clamped with a protective plate.

4. A high-voltage cable suspension protection device according to claim 3, characterized in that: The support frame includes several transverse main beams (14) arranged at equal intervals along the length of the foundation pit. Both ends of the transverse main beams (14) are welded with connecting plates, and the connecting plates are fixedly connected to the horizontal bearing surface of the bearing groove (3) by fastening bolts.

5. A high-voltage cable suspension protection device according to claim 4, characterized in that: Several pairs of equally spaced distribution beams (15) are fixedly connected between two adjacent transverse main beams (14). A T-shaped connector (16) is snapped between each pair of distribution beams (15), and several support channel steels (17) are fixedly connected between two adjacent pairs of T-shaped connectors (16). The suspension screw (12) passes through the support channel steel (17) and is fixedly connected to the support channel steel (17) by a nut.

6. A high-voltage cable suspension protection device according to claim 1, characterized in that: The inclined damping rod (11) includes a first adjusting ear (18) rotatably connected to the outer end lug of the U-shaped support frame (4). The inner end of the first adjusting ear (18) is threaded with a connecting rod (19). The end of the connecting rod (19) away from the first adjusting ear (18) is fixedly connected with a connecting sleeve (20).

7. A high-voltage cable suspension protection device according to claim 6, characterized in that: The inner wall of the connecting sleeve (20) is slidably connected to two axially divided damping cylinders (21), and the inner wall of each damping cylinder (21) is fixedly connected to several axially equally spaced retaining rings (22).

8. A high-voltage cable suspension protection device according to claim 7, characterized in that: The inner wall of the retaining ring (22) is slidably connected to a damping rod (23), and the outer wall of the damping rod (23) is fixedly connected to a plurality of friction plates (24) distributed at equal intervals along the axial direction. The outer wall of the damping rod (23) is slidably connected to a plurality of disc spring groups (25) distributed at equal intervals along the axial direction. The high end of the disc spring group (25) abuts against the retaining ring (22), and the low end of the disc spring group (25) abuts against the friction plates (24). The friction plates (24) and the inner wall of the damping cylinder (21) form a friction pair.

9. A high-voltage cable suspension protection device according to claim 8, characterized in that: The damping rod (23) is threaded to a second adjusting lug (26) at the end away from the connecting rod (19). The second adjusting lug (26) is rotatably connected to the T-shaped connector (16) via a lifting lug. The outer end of the connecting sleeve (20) is threaded to an end cap (27).

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