Modular assembled nuclear island cable support and hanger anti-seismic structure

Abstract

This utility model discloses a modular prefabricated seismic-resistant structure for nuclear island cable supports, relating to the field of nuclear island cable installation technology. The utility model includes: a fixed base, fixed to the nuclear island wall or floor slab by chemical anchors, with several positioning holes on the upper surface of the fixed base; a modular support frame, composed of longitudinal support columns and transverse load-bearing beams, with positioning pins at the bottom of the longitudinal support columns that mate with the positioning holes, the positioning pins being inserted into the positioning holes and fixed by locking nuts; and an elastic buffer connector. This utility model, through the setting of positioning pins and positioning holes, connects the fixed base and the modular support frame via positioning pins, positioning holes, and locking nuts. This connection method is simple and intuitive, requiring no complex on-site processing or high-precision alignment operations. Construction personnel only need to assemble according to the preset positioning relationship to complete the connection and fixation of the two.

Description

Technical Field

[0001] This utility model belongs to the field of nuclear island cable installation technology, specifically, it relates to a modular assembled nuclear island cable support and hanger anti-seismic structure. Background Technology

[0002] The nuclear island is the core of a nuclear power plant, containing key equipment such as nuclear reactors and steam generators. Its internal cable system is responsible for important functions such as power transmission and signal control, which is crucial to the safe and stable operation of the nuclear power plant. Nuclear island cables usually need to be fixed and supported by supports and hangers. Due to the special environment of the nuclear island, the seismic performance requirements for cable supports and hangers are extremely high.

[0003] Chinese patent CN221402043U discloses a seismic bracing structure, including: a vertical adjustment component, a seismic connecting seat, and a diagonal bracing rod. At least one vertical adjustment component is provided, with one end fixedly connected to a beam / slab. The seismic connecting seat is fixedly connected to the other end of the vertical adjustment component. The length of the vertical adjustment component is adjustable. The seismic connecting seat is suitable for installing pipe fittings. When the length of the vertical adjustment component is adjusted, the angle between the diagonal bracing rod and the vertical adjustment component changes, allowing for adaptive adjustments to the offset generated during pipe system installation. This ensures the seismic bracing structure is compatible with the pipe system. However, when adjusting the length by rotating the screw, due to the hinged relationship between the diagonal bracing rod, the seismic connecting seat, and the beam / slab, the angle change of the triangular structure must be monitored simultaneously during adjustment to ensure structural stability. This requires a high level of skill from the installers, increasing installation time and difficulty.

[0004] In view of this, this utility model is hereby proposed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a modular assembled nuclear island cable support and hanger anti-seismic structure, which solves the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0007] A modular prefabricated seismic-resistant structure for nuclear island cable supports includes: a fixed base, fixed to the nuclear island wall or floor slab by chemical anchors, the upper surface of the fixed base having several positioning holes; a modular support frame, composed of longitudinal support columns and transverse load-bearing beams, the bottom of the longitudinal support columns having positioning pins that mate with the positioning holes, the positioning pins being inserted into the positioning holes and fixed by locking nuts, the transverse load-bearing beams being connected to the top of the longitudinal support columns; and an elastic buffer connector, disposed on the transverse load-bearing beams, the elastic buffer connector including an outer connecting sleeve and an inner connecting column, the outer connecting sleeve being welded and fixed to the transverse load-bearing beams, the inner connecting column being sleeved inside the outer connecting sleeve.

[0008] Optionally, a buffer layer is provided between the inner connecting column and the outer connecting sleeve. The buffer layer is honeycomb-shaped and made of high-density polyurethane material.

[0009] Optionally, the transverse load-bearing beam is connected to the top of the longitudinal support column via a mortise and tenon structure, and the mortise and tenon joint is filled with a rubber shock-absorbing pad.

[0010] Optionally, the end of the inner connecting post away from the outer connecting sleeve is bolted to a cable clamping assembly.

[0011] Optionally, the cable clamping assembly includes a clamping frame connected to the inner connecting column. The clamping frame is U-shaped, and a clamping plate is connected to the top opening via an adjustment component. The clamping frame and the clamping plate are provided with arc grooves on their opposite surfaces, and a silicone shock-absorbing layer is connected inside the arc grooves.

[0012] Optionally, the clamping frame has grooves at both ends of its inner wall, the clamping plate is located in the grooves at both ends, and the adjustment component is located in the grooves.

[0013] Optionally, the adjusting assembly includes a guide rod fixedly connected to the bottom wall of the groove, the guide rod passing through the clamping plate, and the adjusting assembly also includes a screw connected to the bottom wall of the groove, the screw passing through the clamping plate and threadedly connected to the clamping plate.

[0014] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time:

[0015] 1. By setting up structures such as positioning pins and positioning holes, the fixed base and the modular support frame are connected by positioning pins, positioning holes and locking nuts. This connection method is simple and intuitive, without the need for complicated on-site processing or high-precision alignment operations. Construction personnel only need to assemble according to the preset positioning relationship to complete the connection and fixation of the two.

[0016] 2. By setting up structures such as transverse load-bearing beams and longitudinal support columns, the connection between transverse load-bearing beams and longitudinal support columns, and the bolt connection between inner connecting columns and cable clamping components, all adopt standardized connection methods. The operation process is simple and easy to understand, and the skill requirements for construction personnel are relatively low. Even less experienced construction personnel can quickly master the installation essentials, effectively reducing the risk of installation errors caused by improper operation.

[0017] 3. By setting up a buffer layer, the honeycomb high-density polyurethane buffer layer can efficiently absorb and buffer vibration energy through its unique structure and material properties. The rubber shock-absorbing pads at the tenon and mortise joints further reduce the vibration transmission between the support frames. The silicone shock-absorbing layer in the cable clamp assembly directly buffers and protects the cables. The multi-layered shock absorption design works synergistically to greatly improve the seismic resistance and vibration reduction capabilities of the entire support structure, and can more effectively protect the safety of nuclear island cables in earthquake and other vibration environments.

[0018] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure;

[0021] Figure 2 A schematic diagram showing the separate structure of the outer connecting sleeve and the inner connecting column;

[0022] Figure 3 This is a schematic diagram of the cable clamping assembly structure;

[0023] Figure 4 This is a schematic diagram of a structure where the fixed base and longitudinal support columns are separate.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Fixed base; 2. Longitudinal support column; 3. Transverse load-bearing beam; 4. Outer connecting sleeve; 5. Buffer layer; 6. Inner connecting column; 7. Clamping frame; 8. Positioning pin; 9. Positioning hole; 10. Clamping plate; 11. Guide rod; 12. Screw; 13. Silicone shock-absorbing layer; 14. Groove.

[0026] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings.

[0028] Please see Figure 1-4 As shown, this embodiment provides a modular prefabricated nuclear island cable support and hanger seismic-resistant structure, including: a fixed base 1, fixed to the nuclear island wall or floor slab by chemical anchors, the upper end face of the fixed base 1 having several positioning holes 9; a modular support frame, composed of longitudinal support columns 2 and transverse load-bearing beams 3, the bottom of the longitudinal support columns 2 having positioning pins 8 that cooperate with the positioning holes 9, the positioning pins 8 being inserted into the positioning holes 9 and fixed by locking nuts, the transverse load-bearing beams 3 being connected to the top of the longitudinal support columns 2; and an elastic buffer connector, disposed on the transverse load-bearing beams 3, the elastic buffer connector including an outer connecting sleeve 4 and an inner connecting column 6, the outer connecting sleeve 4 being welded and fixed to the transverse load-bearing beams 3, and the inner connecting column 6 being sleeved inside the outer connecting sleeve 4.

[0029] The fixed base 1, as the fundamental load-bearing component of the entire support system, is firmly connected to the nuclear island wall or floor slab via chemical anchors. It effectively transfers the weight of the cables and external loads (such as seismic forces) borne by the support system to the main building structure, ensuring the overall installation stability of the support system. Several positioning holes 9 on its upper surface provide a positioning reference for precise docking with the modular support frame, ensuring installation accuracy. The modular support frame, composed of longitudinal support columns 2 and transverse load-bearing beams 3, is the main load-bearing structure supporting the cables. The positioning pins 8 at the bottom of the longitudinal support columns 2 engage with the positioning holes 9 of the fixed base 1, and are then secured with lock nuts, achieving a detachable connection. This connection method ensures both stability and durability. It is also convenient for installation and disassembly and adjustment during later maintenance. The transverse load-bearing beam 3 is connected to the top of the longitudinal support column 2 to form a stable frame structure, providing an installation carrier for the elastic buffer connector and cable clamp, bearing the weight of the cable and transferring the load to the longitudinal support column 2; the elastic buffer connector is one of the key components to realize the shock absorption function. The outer connecting sleeve 4 is welded and fixed to the transverse load-bearing beam 3 to ensure the rigid connection between itself and the support frame. The inner connecting column 6 is sleeved in the outer connecting sleeve 4 to form a relatively movable structure. When subjected to external forces such as earthquakes, the inner connecting column 6 can generate a certain displacement relative to the outer connecting sleeve 4. This displacement is buffered by the structure between the two, thereby reducing the transmission of vibration to the cable;

[0030] The fixed base 1 and the modular support frame are detachably connected by positioning pins 8, positioning holes 9 and locking nuts. This modular design allows each component to be prefabricated in the factory and only needs to be assembled on site, which greatly reduces the complexity of on-site construction, shortens the installation period and improves construction efficiency. At the same time, the detachable connection method also facilitates later inspection, maintenance and component replacement, and reduces interference with the normal operation of the nuclear island.

[0031] In this embodiment, a buffer layer 5 is provided between the inner connecting column 6 and the outer connecting sleeve 4. The buffer layer 5 is honeycomb-shaped and made of high-density polyurethane material.

[0032] The honeycomb structure itself has numerous interconnected pores. When subjected to vibration, these pores will be squeezed and deformed, converting the kinetic energy generated by the vibration into the deformation energy of the material, thereby absorbing and buffering the vibration. The high-density polyurethane material has good elasticity and toughness, and can quickly recover its original shape after being subjected to external force. It also has excellent aging resistance and can maintain a stable buffering effect for a long time. When the inner connecting column 6 moves relative to the outer connecting sleeve 4, the deformation of the buffer layer 5 effectively reduces the vibration transmission efficiency and reduces the impact of vibration on the cable.

[0033] The transverse load-bearing beam 3 is connected to the top of the longitudinal support column 2 through a mortise and tenon structure, and the mortise and tenon joint is filled with a rubber shock-absorbing pad.

[0034] In use, the mortise and tenon structure is a traditional and reliable connection method. Its concave and convex parts interlock and can transmit a large load. The rubber shock-absorbing pads filled at the mortise and tenon joints are soft and elastic. When an earthquake or other vibration occurs, the rubber shock-absorbing pads will undergo elastic deformation due to the force, absorbing some of the vibration energy. At the same time, it reduces the vibration transmission between the transverse load-bearing beam 3 and the longitudinal support column 2, avoids the vibration amplification effect caused by rigid connection, and enhances the seismic performance of the entire support frame.

[0035] The inner connecting post 6, away from the outer connecting sleeve 4, is bolted to a cable clamping assembly. The cable clamping assembly includes a clamping frame 7 connected to the inner connecting post 6. The clamping frame 7 is U-shaped, and a clamping plate 10 is connected to the top opening via an adjustment assembly. The clamping frame 7 and the clamping plate 10 are both provided with arc grooves on their opposite sides, and a silicone damping layer 13 is connected inside the arc grooves. The left and right ends of the inner wall of the clamping frame 7 are both provided with grooves 14. The left and right ends of the clamping plate 10 are respectively located in the grooves 14, and the adjustment assembly is located in the grooves 14. The adjustment assembly includes a guide rod 11 fixedly connected to the bottom wall of the groove 14. The guide rod 11 passes through the clamping plate 10. The adjustment assembly also includes a screw 12 connected to the bottom wall of the groove 14. The screw 12 passes through the clamping plate 10 and is threadedly connected to the clamping plate 10.

[0036] The end of the inner connecting post 6 furthest from the outer connecting sleeve 4 is bolted to the cable clamping assembly. This bolted connection facilitates the installation, disassembly, and replacement of the clamping assembly. The clamping frame 7 within the clamping assembly is U-shaped, providing a stable placement space for the cable. The clamping plate 10, connected to the top opening via an adjustment assembly, can be adjusted to accommodate cables of different diameters. The arc grooves on the opposing surfaces of the clamping frame 7 and the clamping plate 10 better conform to the cylindrical surface of the cable, increasing the contact area and improving clamping stability. The silicone damping layer 13 within the arc groove is soft and elastic, acting as a buffer when the cable is subjected to vibration, preventing hard collisions between the cable and the clamping frame 7 and clamping plate 10. On the one hand, the silicone material has high friction, which can prevent the cable from slipping during clamping. The left and right ends of the clamping plate 10 are located in the grooves 14 on the inner wall of the clamping frame 7. The grooves 14 guide the movement of the clamping plate 10, ensuring the stability of the clamping plate 10 during adjustment. The guide rod 11 in the adjustment assembly passes through the clamping plate 10, further enhancing the guiding nature of the movement of the clamping plate 10 and preventing it from deviating during adjustment. The screw 12 passes through the clamping plate 10 and is threadedly connected to the clamping plate 10. When the screw 12 is rotated, the screw transmission principle can be used to drive the clamping plate 10 to move along the guide rod 11 and the screw 12, realizing precise adjustment of the position of the clamping plate 10, thereby adapting to the clamping requirements of cables of different specifications.

[0037] Working principle:

[0038] When an earthquake occurs, the vibration is transmitted through the walls or floors to the fixed base 1. Some of the energy is absorbed by the main building structure, and the remaining energy is transmitted to the modular support frame. The rubber damping pads at the mortise and tenon joints of the frame first absorb some of the energy and weaken the transmission. Then the energy is transmitted to the elastic buffer connector, and the honeycomb buffer layer 5 further absorbs and dissipates the energy through deformation. Finally, a small amount of energy is transmitted to the cable clamping assembly, where the silicone damping layer 13 absorbs the energy again, and the clamping assembly stably clamps the cable to prevent it from slipping, forming a complete earthquake-resistant system to protect the cable.

[0039] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.

Claims

1. A modular fabricated nuclear island cable support hanger seismic structure, characterized in that, include: The fixed base (1) is fixed to the nuclear island wall or floor by chemical anchors, and the upper end face of the fixed base (1) is provided with a number of positioning holes (9); The modular support frame consists of longitudinal support columns (2) and transverse load-bearing beams (3). The bottom of the longitudinal support column (2) is provided with a positioning pin (8) that cooperates with the positioning hole (9). The positioning pin (8) is inserted into the positioning hole (9) and fixed by a locking nut. The transverse load-bearing beam (3) is connected to the top of the longitudinal support column (2). An elastic buffer connector is provided on the transverse load-bearing beam (3). The elastic buffer connector includes an outer connecting sleeve (4) and an inner connecting column (6). The outer connecting sleeve (4) is welded and fixed to the transverse load-bearing beam (3), and the inner connecting column (6) is sleeved inside the outer connecting sleeve (4).

2. The modular assembly type nuclear island cable support and hanger seismic structure according to claim 1, characterized in that: A buffer layer (5) is provided between the inner connecting column (6) and the outer connecting sleeve (4). The buffer layer (5) is honeycomb-shaped and made of high-density polyurethane material.

3. The modular assembly type nuclear island cable support and hanger seismic structure according to claim 1, characterized in that: The transverse load-bearing beam (3) is connected to the top of the longitudinal support column (2) through a mortise and tenon structure, and the mortise and tenon joint is filled with a rubber shock-absorbing pad.

4. The modular assembly type nuclear island cable support and hanger seismic structure according to claim 1, characterized in that: The inner connecting post (6) is connected to a cable clamping assembly by bolts at one end away from the outer connecting sleeve (4).

5. The modular assembly type nuclear island cable support and hanger seismic structure according to claim 4, characterized in that: The cable clamping assembly includes a clamping frame (7) connected to the inner connecting column (6). The clamping frame (7) is U-shaped, and a clamping plate (10) is connected to the top opening through an adjustment component. The clamping frame (7) and the clamping plate (10) are both provided with arc grooves on their opposite surfaces, and a silicone shock-absorbing layer (13) is connected inside the arc groove.

6. The modular assembly type nuclear island cable support and hanger seismic structure according to claim 5, characterized in that: The clamping frame (7) has grooves (14) on both the left and right sides of its inner wall. The clamping plate (10) is located in the grooves (14) on both the left and right sides, and the adjustment component is located in the grooves (14).

7. The modular assembly type nuclear island cable support and hanger seismic structure according to claim 6, characterized in that: The adjustment assembly includes a guide rod (11) fixedly connected to the bottom wall of the groove (14), the guide rod (11) passing through the clamping plate (10), and the adjustment assembly also includes a screw (12) connected to the bottom wall of the groove (14), the screw (12) passing through the clamping plate (10) and threadedly connected to the clamping plate (10).

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