A device for fixing a steel strand

Abstract

The utility model discloses a device of fixed strand, belongs to the steel strand placing technical field, solved the steel strand and support in the prior art device and be rigid direct contact, lack the problem of buffer or antifriction, the utility model discloses a cable -stayed steel strand and straight -pulled steel strand still include first support, and the first support is cubic, and the first support is partially provided with gap, and the first support is divided into two along the gap center axis, and the gap is equipped with the rolling axle between, and the cable -stayed steel strand is arranged in the gap below the rolling axle, and the straight -pulled steel strand is arranged in the junction of the first support lower part. The utility model discloses through the structural design of first support, second support and the optimal allocation of each component, realized the integration of cable -stayed steel strand and straight -pulled steel strand fixed, solved many pain points of the prior art device simultaneously.

Description

Technical Field

[0001] This utility model belongs to the field of steel strand placement technology, specifically relating to a device for fixing steel strands. Background Technology

[0002] In fields such as bridges, building curtain walls, and prestressed engineering, steel strands, as key load-bearing components, often require simultaneous oblique tensioning and axial tensioning (i.e., direct tensioning). However, existing steel strand fixing devices suffer from the following technical limitations, making it difficult to meet actual engineering needs: 1. Limited functionality and poor adaptability: Traditional fixing devices are mostly designed for steel strands with a single direction of force (only able to fix inclined or straight steel strands). If a project requires fixing steel strands in both directions at the same time, multiple independent devices need to be set up, which not only increases the cost of equipment procurement, but also leads to crowded installation space, complicated construction procedures, and reduced overall construction efficiency.

[0003] II. Severe wear and shortened lifespan of steel strands: In existing devices, the steel strands and supports are mostly in rigid direct contact, lacking buffering or friction-reducing structures. When the steel strands undergo slight displacement due to load changes (such as temperature deformation, vibration, and load fluctuations), the surface of the steel strands is prone to hard friction with the inner wall of the support, leading to increased risk of wear and corrosion of the outer steel wires, directly shortening the service life of the steel strands, and even causing safety hazards.

[0004] 3. Inconvenient disassembly and assembly of supports and high maintenance costs: Most fixed supports are integral structures. When the steel strands are installed, or when they are inspected or replaced, the entire device needs to be disassembled and readjusted, which is complicated and time-consuming. Some split supports are connected only by a single high-strength bolt, which is not strong enough. After long-term stress, the high-strength bolt is prone to loosening, which can lead to displacement of the steel strands or deformation of the support.

[0005] IV. Lack of sealing and buffering: No protective structure is set at the connection between the steel strand and the support. External dust, rainwater and corrosive media can easily enter the connection gap, causing the internal components of the support to rust and the high-strength bolts to jam. At the same time, the vibration of the straight steel strand under stress cannot be buffered and can be easily transmitted to the support body, causing structural resonance or local stress concentration.

[0006] To address the aforementioned issues, there is an urgent need for a fixing device that can be adapted to both inclined and straight-stayed steel strands, has friction-reducing and buffering functions, is easy to assemble and disassemble, and is reliable in fixing, so as to meet the multi-functional requirements for fixing steel strands in engineering projects and improve construction efficiency and structural safety. Utility Model Content

[0007] The purpose of this invention is to provide a device for fixing steel strands, so as to solve the problem that in existing devices, the steel strands and supports are mostly in rigid direct contact, lacking buffering or friction reduction.

[0008] The technical solution of this utility model is: a device for fixing steel strands, including inclined steel strands and straight steel strands, and also including a first support. The first support is cubic in shape, and a gap is opened in the upper part of the first support. The first support is divided into two along the central axis of the gap, and a roller is inserted through the gap. The inclined steel strands are inserted through the gap below the rollers, and the straight steel strands are inserted through the connection point in the lower part of the first support.

[0009] As a further improvement of this utility model, the lower part of the first support is connected by multiple high-strength bolts and matching nuts.

[0010] As a further improvement of this utility model, a rubber ring is provided at the connection between the first support and the straight-pull steel strand.

[0011] A device for fixing steel strands includes inclined steel strands and straight steel strands, and also includes a second support. The second support is a cube with a convex cross-section. The horizontal part of the second support is divided into two along its central axis. A gap is opened in the vertical part of the second support, and a roller passes through the gap. The inclined steel strand passes through the gap below the roller, and the straight steel strand passes through the connection of the horizontal part of the second support.

[0012] As a further improvement of this utility model, the horizontal and vertical parts of the second support are connected by multiple high-strength bolts and matching nuts.

[0013] As a further improvement of this utility model, a rubber ring is provided at the connection between the second support and the straight-pull steel strand.

[0014] The beneficial effects of this utility model are as follows: Through the structural design of the first and second supports and the optimized configuration of each component, this utility model achieves integrated fixing of the inclined and straight steel strands, while solving many pain points of existing devices. The specific beneficial effects are as follows: 1. The design of splitting the upper part of the first support along the central axis of the gap allows the support to be opened directly to expose the internal space of the gap, which facilitates the installation of the inclined steel strands, the installation of the rollers, and subsequent maintenance (such as roller lubrication and steel strand position adjustment) without disassembling the entire device, greatly simplifying the operation process and improving construction and maintenance efficiency; the split structure can also be adapted to inclined steel strands of different diameters (by adjusting the docking gap between the two parts of the support), expanding the applicability of the device.

[0015] 2. The second support's convex-shaped structure divides the support into horizontal and vertical sections. The horizontal section is used to fix the straight tension steel strands, while the vertical section is used to fix the inclined tension steel strands. This partitioned design makes the force direction of the two types of steel strands clearer and avoids mutual interference. At the same time, the convex-shaped structure has a larger moment of inertia, and compared with ordinary cubic supports, it has a stronger overall resistance to deformation and can withstand greater tension loads, thus improving the structural stability of the device. The design of splitting the horizontal and vertical sections along the central axis is similar to that of the first support, which facilitates the installation and maintenance of the straight tension steel strands.

[0016] 3. Gap and Roller Fitting Structure: The gap provides dedicated space for the inclined steel strand, preventing interference between the strand and other parts of the support. The roller is installed through the gap, with the inclined steel strand located below it. When the strand undergoes slight displacement due to load changes, the roller can roll synchronously with the strand, converting the sliding friction between the strand and the support into rolling friction. This significantly reduces the wear on the strand surface and extends its service life. Simultaneously, the rolling characteristics of the roller can accommodate slight angular deviations of the inclined steel strand, preventing localized stress concentration caused by rigid constraints and improving structural safety.

[0017] The gap in the vertical part of the second support and the roller have the same function as the roller in the first support. The roller in the vertical part can convert the sliding friction of the inclined steel strand into rolling friction, reducing wear and stress concentration. The gap design in the vertical direction is more suitable for the "vertical inclined tension" scenario in the project (such as curtain wall suspension, vertical prestressing), which broadens the application scenario of the device and eliminates the need for additional custom-made special supports.

[0018] 4. The lower part of the support is connected by multiple high-strength bolts and nuts. Compared with a single high-strength bolt connection, the symmetrical distribution of multiple high-strength bolts ensures more even stress distribution on the support mating surface, preventing excessive local stress that could lead to support deformation. The detachable connection of the high-strength bolts and nuts ensures the firmness of the straight-pull steel strand fixation (by tightening the high-strength bolts to clamp the steel strand) and facilitates later adjustment of the steel strand position or replacement of components. Simultaneously, the standardized design of the high-strength bolts and nuts reduces the cost of purchasing and replacing parts, improving the versatility of the device. The horizontal and vertical parts of the second support are connected by multiple high-strength bolts and nuts, ensuring the fixation strength of the straight-pull steel strand and preventing loosening under long-term stress.

[0019] 5. The rubber ring installed at the connection of the straight-pull steel strand serves three purposes: First, it buffers and reduces vibration, absorbing the vibration generated when the straight-pull steel strand is under stress, preventing the vibration from being transmitted to the support body and causing resonance or loosening of high-strength bolts; second, it provides wear protection, as the rubber ring isolates the steel strand from direct metal-to-metal contact with the support, further reducing wear on the surface of the steel strand; third, it provides sealing and corrosion protection, as the rubber ring fills the connection gap between the steel strand and the support, preventing dust, rainwater, and corrosive media from entering, avoiding corrosion of internal components of the support (such as high-strength bolts and mating surfaces), and extending the overall service life of the device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the first support structure in this utility model; Figure 2 This is a schematic diagram of the second support structure in this utility model; Figure 3 This is a schematic diagram of the support of this utility model.

[0021] In the diagram: 1-First support; 2-Second support; 3-Inclined steel strand; 4-Straight steel strand; 5-Gap; 6-High-strength bolt; 7-Nut; 8-Rubber ring; 9-Roller; 10-Support centerline. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1-3 As shown, a device for fixing steel strands includes inclined steel strands and straight steel strands, and also includes a first support 1. The first support 1 is cubic in shape, and a gap 5 is provided in the upper part of the first support 1. The first support 1 is divided into two along the central axis of the gap 5, and a roller 9 is provided through the gap 5. The inclined steel strand 3 passes through the gap 5 below the roller 9, and the straight steel strand 4 passes through the connection point of the lower part of the first support 1.

[0024] The lower part of the first support 1 is connected by multiple high-strength bolts 6 and matching nuts 7.

[0025] A rubber ring 8 is provided at the connection between the first support 1 and the straight steel strand 4.

[0026] A device for fixing steel strands includes inclined steel strands and straight steel strands, and also includes a second support 2. The second support 2 is a cube with a convex cross-section. The horizontal part of the second support 2 is divided into two along its central axis. The vertical part of the second support 2 has a gap 5. A roller 9 passes through the gap 5. The inclined steel strand 3 passes through the gap 5 below the roller 9. The straight steel strand 4 passes through the connection of the horizontal part of the second support 2.

[0027] The horizontal and vertical parts of the second support 2 are connected by multiple high-strength bolts 6 and matching nuts 7.

[0028] A rubber ring 8 is provided at the connection between the second support 2 and the straight steel strand 4.

[0029] Steps for using the first support 1: Make sure the gaps 5 between the left and right halves of the first support 1 are completely aligned and the mounting slots of the roller 9 are aligned. Place the roller 9 into the preset groove of the gap 5, apply a small amount of anti-rust lubricant, and ensure that the roller 9 can rotate freely in the groove and that the roller axis is parallel to the central axis of the gap 5. Insert the high-strength bolt 6 into the aligned bolt holes, put on the nut 7 and manually pre-tighten it until there is no looseness, then use a torque wrench to tighten it according to the principle of "symmetrical step-by-step tightening" to ensure that the support mating surface is evenly stressed and without local gaps.

[0030] Then, the first support 1 is set axially along the support centerline 10. It can be set on the ground. First, the rubber ring 8 is put on the corresponding position of the straight pull steel strand 4, and then the steel strand is passed through the connecting hole in the lower part of the first support 1. Multiple straight pull steel strands 4 can be set according to actual use. Then, the inclined pull steel strand 3 is passed through the gap 5 below the roller 9. The position of the inclined pull steel strand 3 is adjusted according to the inclined pull angle of the engineering design.

[0031] First, the straight-stayed steel strand 4 and the inclined steel strand 3 are installed on the first support 1. Then, the straight-stayed steel strand 4 is tensioned first, and the lower straight-stayed steel strand 4 is stressed first. After the straight-stayed steel strand 4 is tensioned and stabilized, the inclined steel strand 3 is tensioned. Finally, after the tensioning is completed, concrete is poured. The first support 1 is for one-time use. Since the straight-stayed steel strand 4 is subjected to a large force, rubber rings 8 are set to prevent breakage and improve safety.

[0032] Steps for using the second support 2: Using the centerline of the horizontal section as a reference, align the high-strength bolt holes of the upper and lower halves of the second support 2 with the gap 5 of the vertical section, ensuring that the gaps 5 of the two supports are completely matched and the high-strength bolt holes correspond one-to-one. Place the roller 9 into the groove of the gap 5 in the vertical section, press and splice it, and then connect it with high-strength bolts 6 and nuts to form a complete structure of the second support 2. Then, set the second support 2 axially along the support centerline 10. It can be set on the ground. First, thread the straight pull steel strand 4 through the hole in the horizontal section of the second support 2 and fit the rubber ring 8. Multiple straight pull steel strands 4 can be set according to actual use. Then, place and adjust the position of the diagonal pull steel strand 3 in the gap 5 area below the roller 9.

[0033] First, the straight-stayed steel strand 4 and the inclined steel strand 3 are installed on the second support 2 before tensioning. The lower straight-stayed steel strand 4 is stressed first. After the tensioning is completed, concrete is poured. The second support 2 is for one-time use. The rubber ring 8 is set because the straight-stayed steel strand 4 is under great stress, which prevents it from breaking and improves safety.

[0034] This utility model features integrated fixing, reducing costs and space occupation: both the first support 1 and the second support 2 can simultaneously fix the inclined steel strand 3 and the straight steel strand 4, eliminating the need for multiple independent devices, reducing equipment procurement costs and installation space occupation, simplifying construction procedures, and improving overall project efficiency.

[0035] This utility model is adaptable to multiple scenarios and has strong versatility: the first support 1 is suitable for scenarios of "horizontal inclined tension + horizontal / vertical straight tension" (such as transverse prestressing of bridges), and the second support 2 is suitable for scenarios of "vertical inclined tension + horizontal straight tension" (such as curtain wall suspension of buildings). The two structures cover most engineering needs and have strong versatility, without the need to design separate devices for different scenarios.

[0036] This invention extends service life and improves safety: the friction-reducing effect of the roller 9, the buffering and corrosion-resistant effect of the rubber ring 8, and the firm connection of multiple high-strength bolts 6 together reduce the wear of the steel strand and the device, extending service life; at the same time, it avoids problems such as loosening of the steel strand and stress concentration, improving the safety and stability of the engineering structure.

Claims

1. An apparatus for securing steel strands comprising a cable-stayed steel strand and a straight-drawn steel strand, characterized in that: It also includes a first support (1), which is cubic in shape. A gap (5) is provided in the upper part of the first support (1). The first support (1) is divided into two along the central axis of the gap (5). A roller (9) is provided through the gap (5). The inclined steel strand (3) is provided in the gap (5) below the roller (9). The straight steel strand (4) is provided at the connection of the lower part of the first support (1).

2. A device for securing a steel strand according to claim 1, characterized in that: The lower part of the first support (1) is connected by multiple high-strength bolts (6) and matching nuts (7).

3. A device for securing a steel strand according to claim 1 or 2, characterized in that: A rubber ring (8) is provided at the connection between the first support (1) and the straight steel strand (4).

4. A device for fixing steel strands, comprising inclined steel strands and straight steel strands, characterized in that: It also includes a second support (2), which is a cube with a convex cross-section. The horizontal part of the second support (2) is divided into two along its central axis. The vertical part of the second support (2) has a gap (5). A roller (9) passes through the gap (5). The inclined steel strand (3) passes through the gap (5) below the roller (9). The straight steel strand (4) passes through the connection of the horizontal part of the second support (2).

5. A device for securing a steel strand as defined in claim 4, characterized in that: The horizontal and vertical parts of the second support (2) are connected by multiple high-strength bolts (6) and matching nuts (7).

6. The device for fixing steel strands according to claim 5, characterized in that: A rubber ring (8) is provided at the connection between the second support (2) and the straight steel strand (4).

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