Cast steel spherical inbuilt cable clamp for space structures

Abstract

The utility model provides a kind of cast steel spherical built-in cable clamp holding piece for space structure, belong to building construction field.Its technical scheme is as follows:including annular structure steel pipe, annular structure steel pipe's pipe wall is set with installation slot, the opening of installation slot is provided with arc-shaped plugging plate, the inside of annular structure steel pipe is provided with spherical clamp, spherical clamp is set with the cable hole of penetration, the annular structure steel pipe pipe wall of arc-shaped plugging plate and installation slot corresponding position is respectively set with mutually opposed first semicircular groove and second semicircular groove, and is cooperated to form the positioning hole for the prestressed steel cable to pass through, the prestressed steel cable passes through the utility model positioning hole and the utility model cable hole.The utility model has the beneficial effects that:the utility model embeds cast steel spherical cable clamp in annular structure steel pipe, realizes prestressed steel cable adaptation and reliable anchoring, eliminates the influence of exposed node to building visual sense, while node structure is simple, easy to install and maintain, effectively improves construction efficiency and cost.

Description

Technical Field

[0001] This utility model relates to the field of building construction, and in particular to a cast steel spherical built-in cable clamp for spatial structures. Background Technology

[0002] Currently, in museum atriums, large-span atriums, and "fountain"-shaped spatial structures, a ring-shaped structural steel pipe and spatial prestressed steel cables are often used to form a cable-supported ring beam collaborative force-bearing system to achieve a light and transparent architectural effect. In existing projects, most use exposed cable clamps or external anchors to anchor the prestressed steel cables to the outside of the ring beam or external components at the nodes. This approach creates a large number of protruding components on the outer surface of the ring beam, disrupting the integrity and continuity of the ring structure and affecting the overall appearance of the building facade and interior space. Furthermore, the exposed cable clamp nodes are complex, have a large number of components, and require high precision in processing and installation, resulting in higher costs and a cumbersome installation process, making it difficult to meet the requirements of complex curved spatial structures for node concealment and spatial clearance.

[0003] Furthermore, for prestressed steel cables arranged in a spiral or multi-curvature spatial linear pattern, traditional exposed cable clamps are usually only suitable for a small number of cable directions at specific angles. It is difficult to meet the anchorage requirements of cables in multiple directions and angles within a limited node volume, which can easily lead to cable eccentricity and uneven anchorage stress, thereby affecting the overall stress performance and service safety of the spatial structure. Utility Model Content

[0004] The purpose of this utility model is to provide a cast steel spherical cable clamp that is built into a ring-shaped steel pipe to achieve prestressed steel cable adaptation and reliable anchoring, eliminate the impact of exposed nodes on the building's appearance, and at the same time, the node structure is simple, installation and maintenance are convenient, effectively improving construction efficiency and cost.

[0005] This utility model is achieved through the following measures: A cast steel spherical built-in cable clamp for a space structure is characterized in that it includes an annular structural steel pipe, and an installation groove is provided on the pipe wall of the annular structural steel pipe along the designed position of the cable, and an arc-shaped sealing plate is provided at the opening of the installation groove. The annular steel pipe is equipped with a spherical clamp inside, and a through cable hole is opened at the center of the spherical clamp along the axial direction; The arc-shaped sealing plate and the annular structural steel pipe wall corresponding to the installation groove are respectively provided with a first semicircular groove and a second semicircular groove that are opposite to each other. The first semicircular groove and the second semicircular groove cooperate to form a positioning hole for the prestressed steel cable to pass through. The prestressed steel cable passes through the positioning hole and the cable hole.

[0006] The spherical clamp is divided into a first hemispherical clamp and a second hemispherical clamp that cooperate with each other along the splicing surface. The first hemispherical clamp is fixedly connected to the inner wall of the annular steel pipe, and the second hemispherical clamp can be detachably installed in the mounting groove.

[0007] The specific features of this utility model also include: The first hemispherical clamp and the second hemispherical clamp are respectively provided with semi-circular cable grooves on their opposite splicing surfaces. After the two are spliced ​​together, a cable hole is formed that penetrates the spherical clamp. The cable hole and the positioning hole are coaxially arranged. Preferably, the positions of the cable hole and the positioning hole are set according to the design position and incident angle of the prestressed steel cable of the spatial structure; The angle and direction of the cable hole are set according to the design position and incident angle of the prestressed steel cable of the spatial structure.

[0008] The first hemispherical clamp and the second hemispherical clamp are provided with a plurality of radially distributed threaded mounting holes. Limit bolts are provided in the corresponding threaded mounting holes of the first hemispherical clamp and the second hemispherical clamp for reliably connecting the first hemispherical clamp and the second hemispherical clamp and clamping the prestressed steel cable. The arc-shaped sealing plate has a through hole corresponding to the threaded mounting hole position, and the arc-shaped sealing plate is welded to the opening of the mounting groove; Preferably, a positioning flange is provided between the arc-shaped sealing plate and the annular structural steel pipe to facilitate the installation of the arc-shaped sealing plate.

[0009] With the above structure, the prestressed steel cable passes through the positioning hole and cable hole from the outside of the annular steel pipe and is then anchored inside the spherical clamp, so that the cable clamp is completely built into the annular steel pipe.

[0010] The first hemispherical clamp is welded and fixed to the inner wall of the annular steel pipe, and the semicircular groove of the first hemispherical clamp is set in a corresponding position to the second semicircular groove.

[0011] The first hemispherical clamp and the second hemispherical clamp are machined from a single piece of cast steel.

[0012] The threaded mounting holes are evenly distributed around the circumference of the sphere and are arranged symmetrically to ensure that the spherical clamp is subjected to uniform force.

[0013] The beneficial effects of this utility model are as follows: This utility model integrates cast steel spherical cable clamps into the annular structural steel pipe, achieving prestressed steel cable adaptation and reliable anchoring, eliminating the impact of exposed nodes on the building's appearance, and at the same time, the node structure is simple, installation and maintenance are convenient, effectively improving construction efficiency and cost. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the annular structure and prestressed steel cable in embodiments 1 and 2 of this utility model.

[0015] Figure 2 This is a schematic diagram of the internal spherical clamp of the annular steel pipe in Embodiments 1 and 2 of this utility model.

[0016] Figure 3 This is a schematic diagram of the spherical clamp in embodiments 1 and 2 of this utility model.

[0017] The attached figures are labeled as follows: 1. Annular steel pipe; 2. Prestressed steel cable; 3. Installation groove; 4. Arc-shaped sealing plate; 401. Through hole; 5. First hemispherical clamp; 6. Second hemispherical clamp; 7. Limiting bolt; 8. Threaded mounting hole. Detailed Implementation

[0018] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0019] Example 1 See Figure 1-3 A cast steel spherical built-in cable clamp for a space structure, characterized in that it includes an annular structural steel pipe 1, an installation groove 3 is provided on the pipe wall of the annular structural steel pipe 1 along the designed position of the cable, and an arc-shaped sealing plate 4 is provided at the opening of the installation groove 3. The annular steel pipe 1 is equipped with a spherical clamp inside, and a through cable hole is opened at the center of the spherical clamp along the axial direction; The annular steel pipe 1 at the corresponding position of the arc-shaped sealing plate 4 and the mounting groove 3 is provided with a first semicircular groove and a second semicircular groove that are opposite to each other. The first semicircular groove and the second semicircular groove cooperate to form a positioning hole for the prestressed steel cable 2 to pass through. The prestressed steel cable 2 passes through the positioning hole and the cable hole.

[0020] The spherical clamp is divided into a first hemispherical clamp 5 and a second hemispherical clamp 6 that cooperate with each other along the splicing surface. The first hemispherical clamp 5 is fixedly connected to the inner wall of the annular steel pipe 1, and the second hemispherical clamp 6 is detachably installed in the mounting groove 3.

[0021] The specific features of this utility model also include: The first hemispherical clamp 5 and the second hemispherical clamp 6 are respectively provided with semi-circular cable grooves on their opposite splicing surfaces. After the two are spliced ​​together, a cable hole is formed that penetrates the spherical clamp. The cable hole is coaxially arranged with the positioning hole.

[0022] The first hemispherical clamp 5 and the second hemispherical clamp 6 are provided with a plurality of radially distributed threaded mounting holes 8. Limiting bolts 7 are provided in the threaded mounting holes 8 corresponding to the first hemispherical clamp 5 and the second hemispherical clamp 6 to reliably connect the first hemispherical clamp 5 and the second hemispherical clamp 6 and clamp the prestressed steel cable 2. The arc-shaped sealing plate 4 has a through hole 401 at the position corresponding to the threaded mounting hole 8, and the arc-shaped sealing plate 4 is welded to the opening of the mounting groove 3.

[0023] With the above structure, the prestressed steel cable 2 passes through the positioning hole and cable hole from the outside of the annular steel pipe 1 and is then anchored inside the spherical clamp, so that the cable clamp is completely built into the annular steel pipe 1.

[0024] The first hemispherical clamp 5 is welded and fixed to the inner wall of the annular steel pipe 1, and the semicircular groove of the first hemispherical clamp is set in a corresponding position to the second semicircular groove.

[0025] The spherical clamp is integrally formed from cast steel. The splicing surfaces of the first hemispherical clamp 5 and the second hemispherical clamp 6 are complementary planes or toothed surfaces with positioning bosses and positioning grooves, in order to restrict their relative rotation and misalignment.

[0026] The threaded mounting holes 8 are evenly distributed around the center of the sphere on the circumference and are arranged symmetrically to ensure that the spherical clamp is subjected to uniform force.

[0027] Example 2 See Figure 1-3 The specific implementation of this utility model will be described in conjunction with engineering application scenarios. It should be understood that the following embodiments are only used to illustrate this utility model and are not intended to limit the scope of protection of this utility model. In the "Spring" spatial structure project in the atrium of a museum, a spiral-rising spatial force system is formed by using a ring-shaped steel pipe 1 and multiple prestressed steel cables 2. For the ring beam anchorage end of each prestressed steel cable 2, the cast steel spherical built-in cable clamp of this utility model is used.

[0028] Specifically, the annular structure steel pipe 1 adopts a circular cross-section steel pipe component. During pre-processing, an installation groove 3 is cut out along the circumferential direction at the designed anchorage position of the prestressed steel cable 2. At the same time, an arc-shaped sealing plate 4 matching the size of the installation groove 3 is retained. The length and width of the installation groove 3 are determined according to the outer diameter of the spherical clamp and the construction operation space to ensure that the assembly requirements of the spherical clamp are met without significantly weakening the cross-sectional bearing capacity of the annular structure steel pipe 1. On the inner wall of the mounting groove 3 of the annular steel pipe 1, the first hemispherical clamp 5 is welded and fixed. The weld is arranged along the outer circumference of the spherical clamp and is concentric with the axis of the annular steel pipe 1. The first hemispherical clamp 5 and the second hemispherical clamp 6 are cast steel parts. The splicing surface is provided with complementary positioning bosses and positioning grooves to ensure that the center position of the two hemispheres after combination is accurately determined with the axis of the cable hole. Semicircular cable grooves are opened on the splicing surface of the two hemispheres. After the two are joined together, a cable hole is formed that penetrates the spherical clamp.

[0029] On the wall of the annular structural steel pipe 1 and the arc-shaped sealing plate 4 at the opening of the installation groove 3, the first semicircular groove and the second semicircular groove are respectively processed so that the arc-shaped sealing plate 4 forms a positioning hole for the prestressed steel cable 2 to pass through after it is in place. The axis of the positioning hole is coaxial with the axis of the cable hole inside the spherical clamp so that the prestressed steel cable 2 does not bend when it passes through.

[0030] A number of threaded mounting holes 8 are evenly opened along the circumferential direction on the outer surface of the spherical clamp, and corresponding through holes 401 are opened on the arc-shaped sealing plate 4. During construction, the main ring structure is constructed first. Then, the prestressed steel cables 2 pass through the positioning holes and cable holes sequentially from the outside of the ring structure steel pipe 1. After all the internal cable clamp nodes are pre-installed, the prestressed steel cables 2 are initially tensioned according to the design requirements to eliminate the initial sag and installation errors of the cables and monitor the overall deformation of the spatial structure. Subsequently, the final tensioning is carried out according to the tension control stress or tension control elongation control method to make each prestressed steel cable 2 reach the design cable force. After the final tensioning is completed, the limiting bolts 7 are tightened through the through holes 401 on the sealing plate to lock the prestressed steel cables 2 inside the spherical clamp, completing the anchoring of the cast steel spherical internal cable clamp. Finally, the tightening status of the limiting bolts 7 is checked, and the weld between the arc-shaped sealing plate 4 and the ring structure steel pipe 1, as well as the through holes 401 on the arc-shaped sealing plate 4, are sealed and treated with anti-corrosion to ensure the continuity and integrity of the outer surface of the ring structure steel pipe 1 and improve its durability. At the same time, the appearance of the ring structure steel pipe 1 is restored to a continuous and complete circular cross-section component.

[0031] Through the above embodiments, the cast steel spherical built-in cable clamp of this utility model achieves complete internal integration of nodes and continuous and unified appearance while ensuring the structural safety of the space structure and the reliable anchoring of the prestressed steel cable 2. It is particularly suitable for spatial spiral cable structure projects with high requirements for architectural effect and node concealment.

[0032] The technical features of this utility model not described can be implemented by or by using existing technology, and will not be repeated here. Of course, the above description is not a limitation of this utility model, and this utility model is not limited to the examples above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model should also be within the protection scope of this utility model.

Claims

1. A cast steel spherical built-in cable clamp for a space structure, characterized in that, The system includes a ring-shaped steel pipe, wherein an installation groove is provided on the pipe wall along the designed position of the steel cable, and an arc-shaped sealing plate is provided at the opening of the installation groove; The annular steel pipe is equipped with a spherical clamp inside, and a through cable hole is opened at the center of the spherical clamp along the axial direction; The arc-shaped sealing plate and the annular steel pipe wall corresponding to the installation groove are respectively provided with a first semicircular groove and a second semicircular groove that are opposite to each other. The first semicircular groove and the second semicircular groove cooperate to form a positioning hole for the prestressed steel cable to pass through. The prestressed steel cable passes through the positioning hole and the cable hole. The spherical clamp is divided into a first hemispherical clamp and a second hemispherical clamp that cooperate with each other along the splicing surface. The first hemispherical clamp is fixedly connected to the inner wall of the annular steel pipe, and the second hemispherical clamp can be detachably installed in the mounting groove.

2. The cast steel spherical built-in cable clamp for space structures according to claim 1, characterized in that, The first hemispherical clamp and the second hemispherical clamp are respectively provided with semi-circular cable grooves on their opposite splicing surfaces. After the two are spliced ​​together, a cable hole is formed that penetrates the spherical clamp. The cable hole is coaxially arranged with the positioning hole.

3. The cast steel spherical built-in cable clamp for space structures according to claim 1, characterized in that, The first hemispherical clamp and the second hemispherical clamp are provided with a plurality of radially distributed threaded mounting holes. Limit bolts are provided in the corresponding threaded mounting holes of the first hemispherical clamp and the second hemispherical clamp for reliably connecting the first hemispherical clamp and the second hemispherical clamp and clamping the prestressed steel cable.

4. The cast steel spherical built-in cable clamp for space structures according to claim 1, characterized in that, The arc-shaped sealing plate has a through hole at the position corresponding to the threaded mounting hole, and the arc-shaped sealing plate is welded to the opening of the mounting groove.

5. The cast steel spherical built-in cable clamp for a space structure according to claim 1, characterized in that, The first hemispherical clamp is welded and fixed to the inner wall of the annular steel pipe, and the semicircular groove of the first hemispherical clamp is set in a corresponding position to the second semicircular groove.

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