Resettable connecting device and resettable precast concrete cable trench

Abstract

The application provides a reset connecting device, which is arranged at the joint position of adjacent prefabricated concrete cable trenches, reset node assemblies of the connecting device are arranged on both sides of the joint, elastic reset sheets are connected between the reset node assemblies, the end of the elastic reset sheet is accommodated in a reset oil cylinder of the reset node assembly, when the prefabricated concrete cable trench is dislocated due to short-time external force, the elastic reset sheet is deformed under tension and compresses the oil in the reset oil cylinder; when the external load that causes the dislocation of the cable trench disappears, the elastic reset sheet rebounds under the hydraulic pressure in the reset oil cylinder, pulls the two reset node assemblies connected therewith to reset, and then resets the cable trench fixed therewith, so that the deformation and damage of the joint of the prefabricated concrete cable trench caused by the external short-time load are effectively avoided. The application further provides a resettable prefabricated concrete cable trench.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and more specifically, to a resettable connection device and a resettable precast concrete cable trench. Background Technology

[0002] With the development of urban construction in my country, the construction of power lines and cables in urban renovation and new construction has shifted from above ground to underground. In order to facilitate installation and maintenance, prefabricated concrete cable trenches have been commonly used in recent years. The trenches are prefabricated in sections in the factory and then connected and installed on site.

[0003] However, during use, the joints of precast concrete cable trenches are prone to deformation and damage, affecting the reliability of the entire structure. Furthermore, since precast concrete cable trenches are often laid under roads, they are frequently subjected to large short-term loads from vehicles passing overhead, causing structural misalignment and damage to the cable trench.

[0004] In summary, existing precast concrete cable trenches have technical problems that make them prone to misalignment and damage during use. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that existing precast concrete cable trenches are prone to misalignment and damage during use.

[0006] To address the aforementioned problems, this invention provides a reset connection device for connecting precast concrete cable trenches. The device includes paired reset node assemblies, each fixedly connected to both sides of the joint of the concrete slab in the cable trench. Each pair of reset node assemblies is connected to an elastic reset plate. Each reset node assembly includes a node housing and a reset cylinder disposed within the node housing. The end of the elastic reset plate is sealed and accommodated within the reset cylinder. One end face of the node housing is fixed against the concrete slab. When the concrete slabs on both sides of the joint are misaligned, the elastic reset plate deforms and compresses the oil in the reset cylinder. After the external load is removed, the elastic reset plate rebounds under hydraulic pressure, restoring the relative position between the two reset node assemblies it is connected to.

[0007] This invention relates to a resetting connection device located at the joint of adjacent precast concrete cable trenches. Resetting node components of the device are respectively installed on both sides of the joint, and elastic resetting plates are connected between these components. The ends of the elastic resetting plates are housed within the resetting cylinders of the resetting node components. When adjacent precast concrete cable trenches are subjected to a short-term external force causing misalignment, the elastic resetting plates are subjected to tensile force and deform, compressing the oil in the resetting cylinders. When the external load causing the cable trench misalignment disappears, the elastic resetting plates rebound under the hydraulic pressure within the resetting cylinders. This resetting action is completed under the combined action of the compressed oil in the resetting cylinders and the elastic resetting plates. This structure provides excellent rebound force. To further amplify this rebound effect, the two resetting node components connected to it are pulled back to their original positions, resetting the concrete slab fixed to them. This method effectively solves the technical problem of existing precast concrete cable trenches experiencing misalignment damage under large, short-term external loads, leading to a decrease in the overall structural reliability of the precast concrete cable trench.

[0008] As a preferred embodiment, a support shaft is provided at the opening of the reset cylinder, and the side of the elastic reset plate abuts against the support shaft. This optimizes the fit between the elastic reset plate and the reset cylinder, allowing adjustment of the direction of the reset compression force within the cylinder via the support shaft.

[0009] As a preferred embodiment, the elastic reset plate is S-shaped, with its two ends fixedly connected to the inner walls of the two reset cylinders, respectively. The support shaft abuts against the S-shaped bend of the elastic reset plate. This optimized structure, combined with the support shaft, enhances the shape of the elastic reset plate, amplifying its compression effect on the oil within the reset cylinders.

[0010] As a preferred embodiment, the inner wall of the reset cylinder has an arc shape that matches the shape of the elastic reset plate, and the portion of the elastic reset plate between its end and the support shaft on that side fits against the inner wall of the reset cylinder. This optimization of the internal shape of the reset cylinder, combined with the structural optimization of the elastic reset plate, provides a greater reset force.

[0011] As a preferred embodiment, the elastic reset plate is fitted with sealing ring structures on both sides of the portion where it contacts the inner wall of the reset cylinder, for sealing and isolating the cylinder space on both sides of the elastic reset plate. This optimizes the sealing structure between the elastic reset plate and the reset cylinder, ensuring effective hydraulic rebound.

[0012] As a preferred embodiment, the elastic reset piece includes an integrally connected and fixed connecting portion and bent portions at both ends. The connecting portion is located between the support shafts of two connected reset node assemblies, and the bent portions are located between the support shafts and the ends of the elastic reset piece. The connecting portion is a shape memory metal sheet. The structure of the elastic reset piece has been optimized, and the materials selected for different parts of the reset piece have been optimized according to different functions.

[0013] As a preferred embodiment, a sealing ring is provided between the cylinder port of the reset cylinder and the elastic reset plate to seal the oil inside the cylinder. This further optimizes the sealing structure between the elastic reset plate and the reset cylinder, ensuring effective hydraulic rebound.

[0014] As a preferred embodiment, the outer edge of the node housing is provided with mounting bosses, and the mounting bosses are provided with mounting through holes for inserting mounting rods to cooperate with anchors and connect and fix to the concrete slab. The mounting bosses are distributed on both sides outside the reset cylinder. This optimizes the connection between the device and the concrete and ensures the fixing effect.

[0015] The present invention also provides a resettable precast concrete cable trench, including a mating concrete slab and any of the above-mentioned reset connection devices. Since the above-mentioned reset connection devices have the above-mentioned technical effects, the resettable precast concrete cable trench including the reset connection device should also have the corresponding technical effects.

[0016] As a preferred embodiment, the joints between adjacent concrete slabs are arranged in a wavy pattern with interlocking convex and concave sections, and each pair of reset node components is fixed to adjacent protruding positions on both sides of the concrete slab joint. Optimizing the structure of the reset connection device by adjusting the mating shape of adjacent concrete slabs and the installation position of the reset node components further enhances the elastic reset effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the lateral structure of a reset connection device provided by the present invention;

[0018] Figure 2 for Figure 1 A schematic diagram of the forward structure of the reset connection device;

[0019] Figure 3 for Figure 1 A schematic diagram of the overall structure of the reset connection device;

[0020] Figure 4 for Figure 1 A partially enlarged schematic diagram of the reset node assembly in the reset connection device;

[0021] Figure 5 for Figure 1A schematic diagram of the structure of the resetting connection device under pressure and misalignment in the connected concrete cable trench.

[0022] in, Figures 1-5 middle:

[0023] 1. Concrete slab; 2. Reset node assembly; 2-1. Node housing; 2-2. Reset cylinder; 2-3. Support shaft; 2-4. Sealing ring; 2-5. Mounting boss; 2-6. Anchor; 2-7. Mounting rod; 3. Elastic reset plate; 3-1. Connecting part; 3-2. Bending part. Detailed Implementation

[0024] The technical solution of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] refer to Figures 1-5 , Figure 1 This is a schematic diagram of the lateral structure of a reset connection device provided by the present invention; Figure 2 for Figure 1 A schematic diagram of the forward structure of the reset connection device; Figure 3 for Figure 1 A schematic diagram of the overall structure of the reset connection device; Figure 4 for Figure 1 A partially enlarged schematic diagram of the reset node assembly in the reset connection device; Figure 5 for Figure 1 A schematic diagram of the structure of the resetting connection device under pressure and misalignment in the connected concrete cable trench.

[0026] This embodiment provides a reset connection device for connecting precast concrete cable trenches. It includes a pair of reset node assemblies 2, which are fixedly connected to both sides of the joint of the concrete slab 1 in the cable trench. Each pair of reset node assemblies 2 is connected with an elastic reset plate 3. The reset node assembly 2 includes a node housing 2-1 and a reset cylinder 2-2 disposed in the node housing 2-1. The end of the elastic reset plate 3 is sealed and accommodated in the reset cylinder 2-2. One end face of the node housing 2-1 is fixed to the concrete slab 1. When the concrete slabs 1 on both sides of the joint are misaligned, the elastic reset plate 3 deforms and compresses the oil in the reset cylinder 2-2. After the external load is removed, the elastic reset plate 3 rebounds through hydraulic pressure, restoring the relative position between the two reset node assemblies 2 connected to it.

[0027] In this invention, the reset connection device is installed at the joint of adjacent precast concrete cable trenches. Reset node components of the connection device are respectively installed on both sides of the joint. Elastic reset plates are connected between the reset node components. The end of the elastic reset plate is accommodated in the reset cylinder of the reset node component. When the adjacent precast concrete cable trenches are misaligned due to a short-term external force, the elastic reset plate is deformed by tensile force, compressing the oil in the reset cylinder. When the external load causing the cable trench misalignment disappears, the elastic reset plate rebounds under the hydraulic action in the reset cylinder. This reset action is completed by the combined action of the compressed oil in the reset cylinder and the elastic reset plate. This structure can provide good rebound force. To further amplify this rebound effect, the design of the elastic reset plate can be optimized, such as by using shape memory metal material or optimizing the shape of the elastic metal plate according to the position of the reset node it is connected to. Pulling the two reset node components connected to it back to their original positions, and pulling the concrete slab fixed to it back to its original position, effectively reduces the damage of external loads to the connection points of the precast concrete cable trench and the impact on the overall structural stability. It also provides effective protection for the internal cables, preventing damage to the internal cables. This effectively solves the technical problem of misalignment and connection failure that occurs when existing precast concrete cable trenches are subjected to large, short-term external loads, resulting in a decrease in the overall structural reliability of the precast concrete cable trench.

[0028] In this embodiment, a support shaft 2-3 is provided at the opening of the reset cylinder 2-2, and the side of the elastic reset plate 3 abuts against the support shaft 2-3. This design incorporates a support shaft, with its outer edge abutting against the elastic reset plate. The structure of the support shaft alters the direction of pressure applied to the oil in the cylinder when the elastic reset plate is deformed by force, making the direction of force more suitable for the joining and resetting of concrete.

[0029] In this embodiment, the elastic reset plate 3 is S-shaped, with its two ends fixedly connected to the inner walls of the two reset cylinders 2-2. The support shaft 2-3 abuts against the S-shaped bend of the elastic reset plate 3. Since the structure of the support shaft in the above embodiment changes the direction of force transmission when the elastic reset plate is deformed, this embodiment also adaptively optimizes the shape of the elastic reset plate in conjunction with the support shaft structure. The elastic reset plate is S-shaped overall, with the support shaft located at the bend points at its two ends. Through this structure, when the elastic reset plate is deformed, the compression space is no longer a long, narrow space, but rather rotates within a certain angle around its fixed end, compressing the oil in a fan-shaped area. This amplifies the compression effect on the oil in the reset cylinder, providing a greater reset rebound force.

[0030] In this embodiment, the inner wall of the reset cylinder 2-2 has an arc shape that matches the shape of the elastic reset piece 3. The portion of the elastic reset piece 3 between its end and the side support shaft 2-3 fits against the inner wall of the reset cylinder 2-2. This design optimizes the internal shape of the reset cylinder. It optimizes the shape of the inner wall of the reset cylinder in accordance with the structural adaptability of the elastic reset piece in the above embodiment. Since the shape of the reset cylinder matches the bent structure of the elastic reset piece, their shapes fit perfectly together to form an approximate vacuum space. Therefore, when the elastic reset piece rotates relative to its end under force, the space inside the reset cylinder is completely separated by the elastic reset piece, with oil on one side and no oil on the other. Thus, when the external load disappears and the elastic reset piece resets, one side of the elastic reset piece is filled with oil, while the other side is a vacuum, which amplifies the return effect of the oil pressure and provides a greater reset force.

[0031] In this embodiment, the elastic reset plate 3 has sealing ring structures attached to both sides of its contact area with the inner wall of the reset cylinder 2-2. These sealing rings are used to seal and isolate the internal space of the elastic reset plate 3 on both sides. It should be noted that this embodiment implicitly assumes that the width of the elastic reset plate matches the thickness of the reset cylinder, with only a small gap between them, which is completely sealed by the sealing ring structure. This creates a vacuum on the outer surface of the elastic reset plate, further enhancing the hydraulic rebound effect.

[0032] In the technical solution of this embodiment, the elastic reset piece 3 includes a connecting part 3-1 integrally connected and fixed, and bending parts 3-2 at both ends thereof. The connecting part 3-1 is located between the support shafts 2-3 of the two connected reset node assemblies 2, and the bending parts 3-2 are located between the support shafts 2-3 and the ends of the elastic reset piece 3. The connecting part 3-1 is a memory metal sheet.

[0033] This design optimizes the structure of the elastic reset plate. The materials for different parts of the reset plate are optimized according to different functions. The elastic reset plate is divided according to its function. The middle part, which is almost straight, is the connecting part and uses a memory metal sheet to ensure that after the external force is eliminated, it can be completely restored to its original position by working together with the hydraulic pressure, thus increasing the resettable performance of the cable trench.

[0034] In this embodiment, a sealing ring 2-4 is provided between the cylinder port of the reset cylinder 2-2 and the elastic reset plate 3 to seal the oil inside the cylinder. This further optimizes the sealing structure between the elastic reset plate and the reset cylinder, ensuring effective hydraulic rebound. The sealing ring primarily prevents oil leakage from the reset cylinder, giving the device better durability.

[0035] In this embodiment, the outer edge of the node housing 2-1 is provided with mounting bosses 2-5, and mounting bosses 2-5 are provided with mounting through holes for inserting mounting rods 2-7 to cooperate with anchors 2-6 to connect and fix to the concrete slab 1. The mounting bosses 2-5 are distributed on both sides outside the reset cylinder 2-2. The anchors can be similar to pre-embedded threaded steel or other types of pre-embedded parts to ensure a firm connection. The mounting rods can be bolts or other structures that optimize the connection between the device and the concrete and ensure the fixing effect.

[0036] This invention also provides a resettable precast concrete cable trench, including a mating concrete slab 1 and a reset connection device of any of the above embodiments. Since the reset connection device in the above embodiments has the above technical effects, the resettable precast concrete cable trench including the reset connection device should also have the corresponding technical effects.

[0037] In this embodiment, the joints of adjacent concrete slabs 1 are wavy with interlocking concave and convex shapes. Each pair of reset node components 2 is fixed to adjacent protruding positions on both sides of the joint of the concrete slabs 1. The structural optimization of the reset connection device, including the mating shape of adjacent concrete slabs and the installation position of the reset node components, further enhances the elastic reset effect. The mating position of adjacent precast concrete slabs is a wavy shape with interlocking concave and convex shapes. This arc-shaped fit ensures that adjacent concrete slabs do not experience mechanical jamming after misalignment and are easily reset under the action of rebound force.

[0038] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the scope of protection of this invention.

Claims

1. A reset connection device for connecting a precast concrete cable trench, characterized in that, The system includes a pair of reset node assemblies (2), which are fixedly connected to both sides of the joint of the concrete slab (1) in the cable trench. Each pair of reset node assemblies (2) is connected with an elastic reset plate (3). The reset node assembly (2) includes a node housing (2-1) and a reset cylinder (2-2) disposed in the node housing (2-1). The end of the elastic reset plate (3) is sealed and accommodated in the reset cylinder (2-2). One end face of the node housing (2-1) is fixed to the concrete slab (1). When the concrete slabs (1) on both sides of the joint are misaligned, the elastic reset plate (3) deforms and compresses the oil in the reset cylinder (2-2). After the external load is removed, the elastic reset plate (3) rebounds through hydraulic pressure and returns the relative position between the two reset node assemblies (2) it is connected to to its original position.

2. The reset connection device of claim 1, wherein The opening of the reset cylinder (2-2) is provided with a support shaft (2-3), and the side of the elastic reset plate (3) abuts against the support shaft (2-3).

3. Reset connection device according to claim 2, characterized in that The elastic reset plate (3) is S-shaped, and its two ends are fixedly connected to the inner sidewalls of the two reset cylinders (2-2), respectively. The support shaft (2-3) abuts against the S-shaped bend of the elastic reset plate (3).

4. The reset connection device of claim 3, wherein The inner wall of the reset cylinder (2-2) has an arc shape that matches the shape of the elastic reset piece (3). The portion of the elastic reset piece (3) between its end and the support shaft (2-3) on that side is in contact with the inner wall of the reset cylinder (2-2).

5. The reset connection device of claim 4, wherein, The elastic reset plate (3) has sealing ring structures attached to both sides of the part that is in contact with the inner wall of the reset cylinder (2-2) to seal and isolate the cylinder space on both sides of the elastic reset plate (3).

6. Reset connection device according to any of claims 2-5, characterized in that The elastic reset piece (3) includes an integrally connected and fixed connecting part (3-1) and bent parts (3-2) at both ends. The connecting part (3-1) is located between the support shafts (2-3) of two connected reset node assemblies (2). The bent parts (3-2) are located between the support shafts (2-3) and the ends of the elastic reset piece (3). The connecting part (3-1) is a memory metal sheet.

7. The reset connection device of claim 6, wherein A sealing ring (2-4) is provided between the cylinder port of the reset cylinder (2-2) and the elastic reset plate (3) to seal the oil inside the cylinder.

8. The reset connection device of claim 6, wherein The outer edge of the node housing (2-1) is provided with a mounting boss (2-5), and the mounting boss (2-5) is provided with a mounting through hole for inserting the mounting rod (2-7) to cooperate with the anchor (2-6) to connect and fix with the concrete slab (1). The mounting boss (2-5) is distributed on both sides outside the reset cylinder (2-2).

9. A resettable precast concrete cable trench comprising abutting concrete slabs (1), characterized in that, It also includes the reset connection device as described in any one of claims 1-8.

10. The resettable precast concrete cable trench of claim 9, wherein, The joints of adjacent concrete slabs (1) are wavy with interlocking concave and convex shapes, and each pair of reset node components (2) is fixed to the adjacent protrusions on both sides of the joint of the concrete slabs (1).

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