Directional limiting sliding type netted cable node connecting device

Abstract

The invention belongs to the technical field of building equipment, and particularly relates to a directional limiting sliding type net-shaped cable joint connecting device which comprises two sets of cable clamps arranged back to back, each cable clamp comprises a middle supporting plate, the middle supporting plates of the two cable clamps are connected through an inner partition plate, and the middle supporting plates are provided with two sets of middle web plates in the radial direction; the middle web plates are covered with a cover plate, the middle supporting plate, the two sets of middle web plates and the cover plate define a cable groove, the cable grooves of the two sets of cable clamps are arranged in a crossed mode, and one-way friction sliding blocks are arranged on the side walls, located in the cable grooves, of the middle supporting plate, the two sets of middle web plates and the cover plate. The two sliding directions of the one-way friction sliding blocks have friction coefficient difference, and the arrangement directions of the one-way friction sliding blocks in the two sets of cable grooves are symmetrical based on the horizontal line. Directional limiting sliding, low node stress and low friction can be achieved on the inhaul cable, and the inhaul cable limiting device has the advantages of being long in service life, light in weight and convenient to install.

Description

Technical Field

[0001] The invention belongs to the technical field of construction equipment, and in particular relates to a directional limited sliding type mesh cable node connection device. Background Art

[0002] In large-scale spatial cable-net structures, such as large stadium roofs or complex curtain wall support systems, cables are often arranged in a mesh-like cross pattern to form an efficient spatial force-bearing system. However, this cross arrangement faces a significant challenge under the action of natural wind loads: adjacent cables will produce complex swings under wind excitation. When two cables undergo large relative motions near the spatial intersection, it is very easy for the cables to collide with each other. The hazards of such collisions are multifaceted. Repeated collisions and impacts will wear or even damage the protective sheath of high-density polyethylene or other materials on the surface of the cables, exposing the internal high-strength steel wires to a corrosive environment, seriously threatening the long-term durability of the cables. The impact loads generated by the collisions will introduce additional, unintended dynamic stresses into the cable wires, significantly accelerating the fatigue damage process of the steel wires and reducing the safety margin and service life of the cables.

[0003] While cable clamps can achieve reliable connection, deformation, and coordinated force bearing for multi-directional cables, traditional cable clamps have the following technical issues: Fixed cable clamps completely restrict cable sliding, leading to stress concentration within the cable net under temperature changes or dynamic loads, which can easily cause fatigue damage. Sliding cable clamps allow the cable body to slide and rotate freely, but lack directional control capabilities, resulting in uncontrollable cable net shape and affecting overall stability. Existing cable clamps also struggle to balance the fixing and sliding requirements of cables in different directions, requiring customized designs and difficult construction. Some cable clamps lack directional limiting functions, making cables prone to lateral collisions under wind loads, causing wear or even fracture of the cable surface protective layer. This, in turn, shortens the life of sliding components due to friction and wear, requiring frequent replacement.

[0004] In response to the above problems, there is an urgent need for a mesh cable node connection device that can achieve directional limited sliding, low node stress, low friction, long service life, lightweight and easy installation. Summary of the Invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a directional limited sliding mesh cable node connection device.

[0006] The purpose of the present invention can be achieved through the following technical solutions: A directional limited sliding mesh cable node connection device of the present invention includes two groups of cable clamps arranged back to back, the cable clamps include a middle support plate, the middle support plates of the two cable clamps are connected by an inner partition plate, the middle support plate is radially provided with two groups of middle webs, the middle webs are covered with a cover plate, the middle support plate, the two groups of middle webs and the cover plate are combined to form a cable groove, the cable grooves of the two groups of cable clamps are cross-arranged, and the side walls of the middle support plate, the two groups of middle webs and the cover plate in the cable groove are each provided with a one-way friction slider, the two sliding directions of the one-way friction slider have a difference in friction coefficient, and the setting directions of the one-way friction sliders in the two groups of cable grooves are symmetrical based on the horizontal line.

[0007] Furthermore, the one-way friction slider is provided with a plurality of evenly distributed textures, and two opposite sliding friction surfaces of the textures have a difference in friction coefficient.

[0008] Furthermore, it also includes a stainless steel sleeve, which includes two semicircular sleeves, and the two semicircular sleeves are provided with sleeve locks. The two semicircular sleeves are enclosed on the cable and the sleeve locks on the two semicircular sleeves are locked by bolts. The stainless steel sleeve is slidably set in the cable groove.

[0009] Furthermore, the sleeve lock buckle is arranged outside the cable groove, the width of the sleeve lock buckle of the stainless steel sleeve is greater than the width of the cable groove, and the sleeve lock buckle is used for sliding limitation of the stainless steel sleeve.

[0010] Furthermore, the outer edge of the cross section of the stainless steel sleeve is a quadrilateral.

[0011] Furthermore, it also includes a plurality of middle support stiffening ribs, wherein the middle support stiffening ribs are vertically connected to the middle support plate, and the side surfaces of the middle support stiffening ribs are connected to the side surfaces of the middle web plate.

[0012] Furthermore, bolt holes are provided on the middle support plate, and the bolt holes on the middle support plates of the two groups of cable clamps are connected by bolts.

[0013] Furthermore, an anti-falling lock hole is provided on the middle support plate, and a simple anti-falling buckle is connected to the anti-falling lock hole.

[0014] The beneficial effect of this invention is that, by enabling the nodes to preferentially slide along a "low-friction path" (i.e., the direction of one of the cables) when subjected to unbalanced forces, rather than sliding simultaneously along both cables, bidirectional stress concentration at the intersection node is effectively avoided. This mechanism significantly reduces the risk of overload on the cable clamp body and cables, effectively relieving the restraining forces caused by uneven stress and load, while maintaining the necessary structural stability. Ultimately, it provides a safer, more durable, and reliable connection for key nodes in complex cable net structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the front elevation structure of the mesh cable node connection device; Figure 2 This is a schematic diagram of the side elevation structure of the mesh cable node connection device; Figure 3 Schematic diagram of the front interior of the mesh cable node connection device and the structure of the cables; Figure 4 Schematic diagram of the structure of the back of the mesh cable node connection device and the cables; Figure 5 Schematic diagram of the internal structure of the back of the mesh cable node connection device.

[0017] Explanation of the accompanying drawings: 1. Cross cable; 2. Cover plate; 3. Middle support plate; 4. Middle web plate; 5. Middle support stiffening rib; 6. Bolt hole; 7. Anti-fall lock hole; 8. Inner partition; 9. Stainless steel casing; 10. Casing lock buckle; 11. One-way friction slider. DETAILED DESCRIPTION

[0018] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0019] like Figure 1-5 As shown, a directional limited sliding mesh cable node connection device of the present invention includes two groups of cable clamps arranged back to back, the cable clamps including a middle support plate 3, the middle support plates 3 of the two cable clamps are connected by an inner partition plate 8, the middle support plate 3 is provided with two groups of middle webs 4 along the radial direction, the middle webs 4 are covered with a cover plate 2, the middle support plate 3, the two groups of middle webs 4 and the cover plate 2 are enclosed to form a cable groove, the cable grooves of the two groups of cable clamps are arranged crosswise, and the middle support plate 3, the two groups of middle webs 4 and the cover plate 2 are provided with a one-way friction slider 11 on each side wall of the cable groove, the two sliding directions of the one-way friction slider 11 have a difference in friction coefficient, and the arrangement directions of the one-way friction sliders 11 in the two groups of cable grooves are symmetrical based on the horizontal line; Existing cable clamps are difficult to accommodate both the fixing and sliding requirements of cables in different directions, requiring customized designs and making construction difficult. Some cable clamps also lack directional limiting functions, making cables prone to lateral collisions under wind loads, causing wear and even fracture of the cable surface protective layer. This, in turn, shortens the life of sliding components due to friction and wear, necessitating frequent replacement. To address these issues, the surface of the one-way friction slider 11 is specially designed or constructed of a specific composite material, resulting in significant directional differences in the static and kinetic friction coefficients between it and the cable (or cable protective layer). In the low-friction direction (working direction), when the cable and the one-way friction slider 11 slide or move relative to each other in this direction, the friction provided is low. In the high-friction direction (reset direction), when the cable and the one-way friction slider 11 slide or move relative to each other in the opposite direction (i.e., opposite the working direction), the friction provided is significantly increased. This is the direction in which the cable retracts when the load is unloaded or the cable tension is reduced.

[0020] When external factors, such as wind-induced cable sway or localized load fluctuations, cause unbalanced axial forces or expansion and contraction demands on the two crossed cables 1 at the cable clamp node, the node as a whole tends to move. Because the friction characteristics of the one-way friction sliders 11 corresponding to the two cables are set oppositely, at any given moment, one cable (assuming cable A) is in a "low-friction state" relative to the one-way friction slider 11, while the other cable (assuming cable B) is in a "high-friction state" relative to the one-way friction slider 11. This asymmetry in friction states causes the cable clamp node to prefer moving along a path with less friction—that is, sliding toward the low-friction direction of cable A. At this point, cable A slides relative to the one-way friction slider 11 (low friction), while cable B tends to remain stationary or move only slightly relative to the one-way friction slider 11 (high friction, strong locking effect).

[0021] This mechanism forces the clamp node to slide in the direction of only one of the cables in most cases, rather than both cables sliding significantly relative to each other simultaneously. This is crucial because it avoids the extreme stress states of a "two-way tug-of-war" or "scissors gap" at the intersection. If both cables slide freely at the same time, the node may be pulled in two different directions, resulting in significant shear or torsional stress on the clamp body, connector, or cable anchorage, which can easily lead to local yielding, fatigue damage, or even failure.

[0022] By enabling the nodes to preferentially slide along a "low-friction path" (i.e., the direction of one of the cables) when subjected to unbalanced forces, rather than sliding simultaneously along both cables, bidirectional stress concentration at the intersection is effectively avoided. This mechanism significantly reduces the risk of overload on the clamp body and cables, effectively relieving the restraining forces caused by uneven stress and load, while maintaining the necessary structural stability. Ultimately, it provides a safer, more durable, and reliable connection for key nodes in complex cable net structures.

[0023] The cable clamp is constructed of high-strength, lightweight materials (such as aluminum alloy and galvanized steel), significantly reducing its weight. Its corrosion-resistant design reduces maintenance frequency, significantly lowering overall lifecycle costs. Its material recyclability is ≥80%, significantly reducing carbon emissions compared to traditional cable clamp structures. Furthermore, the clamp's small size effectively reduces wind resistance and minimizes obstruction of the natural landscape. Its simple, modern design (e.g., flat housing and concealed connectors) harmonizes with the overall style of the bridge or building, avoiding the industrial overhang of traditional cable clamps.

[0024] In practical applications, the following design can be adopted but is not limited to: for the node connection device of two cross cables 1, the diameter d of the cross cable 1 is 200 mm; the diameter D of the cover plate 2 and the inner partition 8 is 800 mm; the spacing L between the cross cables 1 is 300 mm; and the total thickness B of the node connection device is 594 mm.

[0025] Specifically, the one-way friction slider 11 is provided with several evenly distributed textures, and the two relative sliding friction surfaces of the texture have a difference in friction coefficient; the texture of the one-way friction slider 11 can be set to be similar to the "human" texture on the tire, with different surface roughness on the two sides of the texture.

[0026] The one-way friction slider 11 is made of polytetrafluoroethylene. The one-way friction slider 11 reduces the one-way friction resistance between the cable and the cable clamp, thereby reducing the heat and wear caused by friction between the cable and the cable clamp, improving the fire resistance of the cable and the life of the protective cover, and extending the life of the cable.

[0027] Furthermore, it also includes a stainless steel sleeve 9, which includes two semicircular sleeves, and a sleeve lock 10 is provided on the two semicircular sleeves. The two semicircular sleeves are enclosed on the cable and the sleeve lock 10 on the two semicircular sleeves is locked by bolts. The stainless steel sleeve 9 is slidably arranged in the cable groove; the sleeve lock 10 is arranged outside the cable groove, and the width of the sleeve lock 10 of the stainless steel sleeve 9 is greater than the width of the cable groove. The sleeve lock 10 is used to limit the sliding of the stainless steel sleeve 9; The stainless steel sleeve 9 is nested within the cross cable 1. The space between the stainless steel sleeve 9 and the cross cable 1 is filled with a heat-resistant material. The stainless steel sleeve 9 is secured to the cross cable 1 using a sleeve lock 10. The heat-resistant material can be made of heat-resistant rubber or a similar material with good heat resistance and durability. To prevent the cable from sliding excessively with the cable clamp under external forces, which could result in significant stress on the cable, the sleeve lock 10 protrudes from the outer wall of the stainless steel sleeve 9, allowing the inner side of the sleeve lock 10 to limit the relative sliding of the cable clamp.

[0028] The nested modular structure can play a directional limiting role on the cables, effectively preventing the mesh cross cables from colliding under the action of lateral wind force, shortening the free length of the cables, and suppressing the vibration of the cables caused by wind. At the same time, it ensures that the cables can freely expand and contract along the axial direction, avoiding pulling damage to the cable clamps or wear of the cable's own protective layer under the action of temperature force, live load, uneven cable force, etc.

[0029] It adopts a nested modular design and assembly method with a small number of components (mainly including the cover plate 2, the middle support plate 3, the web, the partition, the cable sleeve, the one-way friction slider 11 and other main components). The components are connected by ordinary bolts, eliminating the need for welding. The installation method is simple, the operation is convenient, and the maintenance and replacement are easy. In addition, the installation module can be increased according to the number of directions of the multi-directional cross cable to meet the installation requirements of the multi-directional cross cable.

[0030] Furthermore, the outer edge of the cross-section of the stainless steel sleeve 9 is a quadrilateral; after the stainless steel sleeve 9 locks the cable through the sleeve lock 10, it can remain relatively still with the cable, and the cable groove is enclosed by the middle support plate 3, two middle web plates 4 and the cover plate 2, so the cable groove is a quadrilateral structure, and by setting the outer side cross-section of the stainless steel sleeve 9 to a quadrilateral, it can cooperate with the cable groove, which can prevent the cable from twisting during the sliding process and avoid uneven stress on the cable.

[0031] Furthermore, the cable clamp includes a plurality of center support stiffening ribs 5, which are vertically connected to the center support plate 3 and laterally connected to the side surfaces of the center web 4. By welding the bottom and side surfaces of the center support stiffening ribs 5 to the center support plate 3 and the center web 4, respectively, the structural strength of the entire cable clamp can be improved.

[0032] Furthermore, a bolt hole 6 is provided on the middle support plate 3, and the bolt holes 6 on the middle support plates 3 of the two sets of cable clamps are connected by bolts; an anti-fall lock hole 7 is provided on the middle support plate 3, and a simple anti-fall buckle is connected to the anti-fall lock hole 7; the bolt hole 6 is connected by ordinary bolts, which can connect the two cable clamps to form a whole, and the connection process is simple and easy to operate; the anti-fall lock hole 7 is provided with a simple anti-fall buckle, and the double insurance of bolt connection and anti-fall lock hole 7 is used to prevent the connecting device from detaching and falling, which is easy to install and highly safe.

[0033] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A directional limited sliding mesh cable node connection device, characterized by: The invention comprises two groups of cable clamps arranged back to back, the cable clamps comprising a middle support plate, the middle support plates of the two cable clamps are connected by an inner partition plate, the middle support plate is radially provided with two groups of middle webs, the middle webs are covered with a cover plate, the middle support plate, the two groups of middle webs and the cover plate are enclosed to form a cable groove, the cable grooves of the two groups of cable clamps are cross-arranged, and the side walls of the middle support plate, the two groups of middle webs and the cover plate in the cable groove are each provided with a one-way friction slider, the two sliding directions of the one-way friction slider have a difference in friction coefficient, and the setting directions of the one-way friction sliders in the two groups of cable grooves are symmetrical based on the horizontal line.

2. A directional limited sliding mesh cable node connection device according to claim 1, characterized in that: The one-way friction slider is provided with a plurality of evenly distributed textures, and two opposite sliding friction surfaces of the textures have a difference in friction coefficient.

3. The directional limited sliding mesh cable node connection device according to claim 1, characterized in that: It also includes a stainless steel sleeve, which includes two semicircular sleeves. The two semicircular sleeves are provided with sleeve locks. The two semicircular sleeves are enclosed on the cable and the two sleeve locks are locked by bolts. The stainless steel sleeve is slidably arranged in the cable groove.

4. The directional limited sliding mesh cable node connection device according to claim 3, characterized in that: The sleeve lock buckle is arranged outside the cable groove, and the sleeve lock buckle is used for sliding and limiting the stainless steel sleeve.

5. The directional limited sliding mesh cable node connection device according to claim 3, characterized in that: The outer edge of the cross section of the stainless steel sleeve is a quadrilateral.

6. The directional limited sliding mesh cable node connection device according to claim 1, characterized in that: It also includes a plurality of middle support stiffening ribs, wherein the middle support stiffening ribs are vertically connected to the middle support plate, and the side surfaces of the middle support stiffening ribs are connected to the side surfaces of the middle web plate.

7. The directional limited sliding mesh cable node connection device according to claim 1, characterized in that: The middle support plate is provided with bolt holes, and the bolt holes on the middle support plates of the two groups of cable clamps are connected by bolts.

8. The directional limited sliding mesh cable node connection device according to claim 1, characterized in that: An anti-falling lock hole is provided on the middle support plate, and a simple anti-falling buckle is connected to the anti-falling lock hole.

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