A directional limiting sliding type net cable node connecting device

Abstract

The application belongs to the technical field of building equipment, and particularly relates to a directional limiting sliding type netted cable node connecting device, which comprises two groups of cable clamps arranged back to back, the cable clamp comprises a middle support plate, the middle support plates of the two cable clamps are connected through an inner partition plate, the middle support plate is provided with two groups of middle webs along the radial direction, a cover plate is covered on the middle web, the middle support plate, the two groups of middle webs and the cover plate form a cable groove, the cable grooves of the two groups of cable clamps are cross arranged, one-way friction sliding blocks are arranged on each side wall in the cable groove of the middle support plate, the two groups of middle webs and the cover plate, the two sliding directions of the one-way friction sliding blocks have different friction coefficients, and the arrangement directions of the one-way friction sliding blocks in the two groups of cable grooves are symmetrical based on the horizontal line. The directional limiting sliding, low node stress and low friction of the cable can be realized, and the directional limiting sliding type netted cable node connecting device has the characteristics of long service life, light weight and convenient installation.

Description

Technical Field

[0001] This invention belongs to the field of building equipment technology, and specifically relates to a directional limiting sliding mesh cable node connection device. Background Technology

[0002] In large-scale spatial cable-net structures, such as the roofs of large stadiums or complex curtain wall support systems, a mesh-like, intersecting arrangement of cables is often used to form an efficient spatial force-bearing system. However, this intersecting arrangement faces a significant challenge under natural wind loads: adjacent cables will experience complex oscillations under wind excitation. When two cables experience significant relative movement near their spatial intersections, they are highly susceptible to collisions. The hazards of such collisions are multifaceted. Repeated impacts can wear down or even damage the high-density polyethylene or other protective sheathing on the cable surface, exposing the internal high-strength steel wires to a corrosive environment, seriously threatening the long-term durability of the cable. The impact loads generated by collisions introduce additional, unintended dynamic stresses into the cable wires, significantly accelerating the fatigue damage process and reducing the cable's safety margin and service life.

[0003] While cable clamps can achieve reliable connection, deformation, and coordinated stress distribution of multi-directional cables, traditional cable clamps have the following technical problems: Fixed cable clamps: They 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: Although they allow cables to slide and rotate freely, they lack directional control capabilities, resulting in uncontrollable cable net morphology and affecting overall stability; At the same time, existing cable clamps cannot simultaneously meet the fixing and sliding needs of cables in different directions, requiring customized design, which is difficult to construct. Some cable clamps lack directional limiting functions, making cables prone to lateral collisions under wind loads, causing wear or even breakage of the cable surface protective layer. This, in turn, makes the sliding components prone to shortened lifespan due to friction and wear, requiring frequent replacement.

[0004] To address the aforementioned issues, there is an urgent need for a mesh cable node connection device that can achieve directional limiting sliding, low node stress, low friction, long service life, lightweight design, and easy installation. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, the present invention provides a directional limiting sliding mesh cable node connection device.

[0006] The objective of this invention can be achieved through the following technical solutions: The present invention discloses a directional limiting sliding mesh cable node connection device, comprising two sets of cable clamps arranged back to back. Each cable clamp includes a central support plate, and the central support plates of the two cable clamps are connected by an inner partition. The central support plate has two sets of central web plates arranged radially, and a cover plate is placed on the central web plates. The central support plate, the two sets of central web plates, and the cover plate enclose a cable groove. The cable grooves of the two sets of cable clamps are arranged intersectingly. One-way friction sliders are provided on each side wall of the central support plate, the two sets of central web plates, and the cover plate within the cable groove. The two sliding directions of the one-way friction sliders have a difference in friction coefficient. The one-way friction sliders in the two sets of cable grooves are arranged symmetrically based on a horizontal line.

[0007] Furthermore, the unidirectional friction slider is provided with several uniformly distributed textures, and the two opposite sliding friction surfaces of the textures have a difference in the coefficient of friction.

[0008] Furthermore, it also includes a stainless steel sleeve, which comprises two semi-circular sleeves, each with a sleeve lock buckle. The two semi-circular sleeves surround the cable and are locked with bolts to the sleeve lock buckles on the two semi-circular sleeves. The stainless steel sleeve is slidably disposed within the cable groove.

[0009] Furthermore, the sleeve lock is disposed outside the cable groove, and the width of the sleeve lock of the stainless steel sleeve is greater than the width of the cable groove. The sleeve lock is used for sliding limit of the stainless steel sleeve.

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

[0011] Furthermore, it also includes several intermediate support stiffening ribs, which are vertically connected to the intermediate support plate and whose sides are connected to the sides of the intermediate 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 sets of cable clamps are connected by bolts.

[0013] Furthermore, the middle support plate is provided with a fall arrestor hole, and a simple fall arrestor buckle is connected to the fall arrestor hole.

[0014] The beneficial effects of this invention are as follows: by enabling nodes to preferentially slide along the "low-friction path" (i.e., the direction of one of the cables) when subjected to unbalanced forces, rather than sliding simultaneously on both cables, bidirectional stress concentration at intersections is effectively avoided. This mechanism significantly reduces the risk of overload on the cable clamp body and cables, effectively releases the constraint forces caused by uneven stress and load, while maintaining necessary structural stability, ultimately providing a safer, more durable, and reliable critical node connection for complex cable net structures. Attached Figure Description

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

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

[0017] Explanation of reference numerals in the attached 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 sleeve; 10. Sleeve lock; 11. One-way friction slider. Detailed Implementation

[0018] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0019] like Figure 1-5 As shown, the present invention provides a directional limiting sliding mesh cable node connection device, comprising two sets of cable clamps arranged back to back. Each cable clamp includes a central support plate 3. The central support plates 3 of the two cable clamps are connected by an inner partition plate 8. The central support plate 3 is provided with two sets of central web plates 4 in the radial direction. A cover plate 2 is covered on the central web plates 4. The central support plate 3, the two sets of central web plates 4 and the cover plate 2 form a cable groove. The cable grooves of the two sets of cable clamps are arranged crosswise. A one-way friction slider 11 is provided on each side wall of the central support plate 3, the two sets of central web plates 4 and the cover plate 2 within the cable groove. The two sliding directions of the one-way friction slider 11 have a difference in friction coefficient. The one-way friction slider 11 in the two sets of cable grooves is arranged symmetrically based on the horizontal line. Because existing cable clamps cannot meet the needs of fixing and sliding cables in different directions, customized designs are required, which makes construction difficult. Some cable clamps lack directional limiting functions, and cables are prone to lateral collisions under wind loads, which leads to wear and even breakage of the protective layer on the cable surface. Consequently, the sliding parts are prone to shortening their lifespan due to friction and wear, requiring frequent replacement. To address the aforementioned issues, the surface of the unidirectional friction slider 11 is specially designed or made of specific composite materials, resulting in a significant directional difference between the static and dynamic friction coefficients between it and the cable (or cable protective layer). In the low-friction direction of the working direction: when the cable and the unidirectional friction slider 11 tend to slide or move relative to each other in this direction, the frictional force provided is relatively small. In the high-friction direction of the reset direction: when the cable and the unidirectional friction slider 11 have a relative sliding tendency or movement in the opposite direction (i.e., the opposite of the working direction), the frictional force provided is significantly increased; this is the direction in which the cable needs to retract when the load is unloaded or the cable force decreases.

[0020] When external factors such as wind causing cable swaying or local load increases or decreases cause unbalanced axial forces or expansion / contraction demands at the cable clamp node between the two intersecting cables 1, the node as a whole tends to move. Because the friction characteristics of the unidirectional friction sliders 11 corresponding to the two cables are set in opposite directions, at any given moment, one cable (let's say cable A) is in a "low friction state" relative to the unidirectional friction slider 11, while the other cable (let's say cable B) is in a "high friction state" relative to the unidirectional friction slider 11. This asymmetry in friction states makes the cable clamp node more inclined to move along the path of lower friction—that is, sliding towards the low friction direction of cable A. At this time, relative sliding occurs between cable A and the unidirectional friction slider 11 (low friction), while cable B tends to remain relatively stationary or have only slight displacement with respect to the unidirectional friction slider 11 (high friction, strong locking effect).

[0021] This mechanism forces the clamp joint to slide along only one cable in most cases, rather than both cables sliding significantly relative to each other simultaneously. This is crucial because it avoids extreme stress states at the intersection, such as a "two-way tug-of-war" or "scissor difference." If both cables slide freely at the same time, the joint may be pulled in two different directions, causing the clamp body, connectors, or cable anchorage ends to bear enormous shear or torsional stresses, which can easily lead to local yielding, fatigue damage, or even failure.

[0022] By enabling nodes to preferentially slide along the "low-friction path" (i.e., the direction of one of the cables) when subjected to unbalanced forces, rather than sliding simultaneously on both cables, bidirectional stress concentration at intersections is effectively avoided. This mechanism significantly reduces the risk of overload on the cable clamp body and cables, effectively releases the constraint forces caused by stress and load unevenness, and maintains the necessary structural stability, ultimately providing safer, more durable, and reliable critical node connections for complex cable net structures.

[0023] The cable clamps utilize high-strength, lightweight materials (such as aluminum alloy and galvanized steel sheet), significantly reducing their weight. Corrosion-resistant materials reduce maintenance frequency, drastically lowering overall lifecycle maintenance costs. The materials are recyclable (≥80%), resulting in significantly lower carbon emissions compared to traditional cable clamp structures. Furthermore, the compact design effectively reduces wind resistance and minimizes obstruction of the natural landscape. The clean, modern design (such as a flat shell and concealed connectors) harmonizes with the overall style of bridges or buildings, avoiding the jarring industrial look of traditional cable clamps.

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

[0025] Specifically, the unidirectional friction slider 11 is provided with several uniformly distributed textures, and the two opposite sliding friction surfaces of the textures have a difference in the coefficient of friction; the texture of the unidirectional friction slider 11 can be set as a herringbone pattern similar to that on a 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 frictional resistance between the cable and the clamp, thereby reducing the heat and wear caused by friction between the cable and the clamp, improving the fire resistance of the cable and the life of the protective sleeve, and extending the life of the cable.

[0027] Furthermore, it also includes a stainless steel sleeve 9, which comprises two semi-circular sleeves, each with a sleeve locking buckle 10. The two semi-circular sleeves surround the cable and are locked with bolts to the sleeve locking buckles 10 on the two semi-circular sleeves. The stainless steel sleeve 9 is slidably disposed within the cable groove. The sleeve locking buckles 10 are disposed outside the cable groove, and the width of the sleeve locking buckle 10 on the stainless steel sleeve 9 is greater than the width of the cable groove. The sleeve locking buckles 10 are used to limit the sliding movement of the stainless steel sleeve 9. A stainless steel sleeve 9 is used to nest 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 fixed to the cross cable 1 using a sleeve locking buckle 10. The heat-resistant material can be heat-resistant rubber or a similar material with good heat resistance and durability. To prevent excessive relative sliding between the cable and the clamp under external force, which could cause excessive stress on the cable, the sleeve locking buckle 10 protrudes from the outer wall of the stainless steel sleeve 9. This allows the inner side of the sleeve locking buckle 10 to limit relative sliding with the clamp.

[0028] The nested modular structure provides directional control for the cables, effectively preventing collisions between the intersecting cables under lateral wind forces, shortening the free length of the cables, suppressing vibrations caused by wind, and ensuring that the cables can freely expand and contract along the axial direction. This prevents cable clamps from being damaged by tension or the cable's protective layer from wearing down under conditions such as temperature forces, live loads, and uneven cable stress.

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

[0030] Furthermore, the outer edge of the cross-section of the stainless steel sleeve 9 is quadrilateral; after the stainless steel sleeve 9 locks the cable through the sleeve lock 10, it can maintain relative stillness with the cable. The cable groove is surrounded by the middle support plate 3, the two middle web plates 4 and the cover plate 2, so the cable groove is a quadrilateral structure. By setting the outer 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 in the cable.

[0031] Furthermore, it also includes several intermediate support stiffening ribs 5, which are vertically connected to the intermediate support plate 3, and whose sides are connected to the sides of the intermediate web plate 4. By welding the bottom and sides of the intermediate support stiffening ribs 5 to the intermediate support plate 3 and the intermediate web plate 4 respectively to form an integral whole, the structural strength of the entire cable clamp can be improved.

[0032] Furthermore, bolt holes 6 are provided on the middle support plate 3, and the bolt holes 6 on the middle support plate 3 of the two sets of cable clamps are connected by bolts; anti-fall lock holes 7 are provided on the middle support plate 3, and simple anti-fall buckles are connected to the anti-fall lock holes 7; the bolt holes 6 are connected by ordinary bolts, which can connect the two cable clamps into a whole, and the connection process is simple and easy to operate; the anti-fall lock holes 7 are equipped with simple anti-fall buckles, and the double insurance of bolt connection and anti-fall lock holes 7 prevents the connecting device from falling off, which is convenient to install and highly safe.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A directional limiting sliding mesh cable node connection device, characterized in that: The system includes two sets of cable clamps arranged back-to-back. Each cable clamp includes a central support plate, and the central support plates of the two cable clamps are connected by an inner partition. The central support plate has two sets of central web plates arranged radially, and a cover plate is placed on the central web plates. The central support plate, the two sets of central web plates, and the cover plate enclose a cable groove. The cable grooves of the two sets of cable clamps are arranged intersectingly. One-way friction sliders are provided on each side wall of the central support plate, the two sets of central web plates, and the cover plate within the cable groove. The two sliding directions of the one-way friction sliders have a difference in the coefficient of friction. The one-way friction sliders in the two sets of cable grooves are arranged symmetrically based on the horizontal line. Since the friction characteristics of the one-way friction sliders corresponding to the two cables are set in opposite directions, at any specific time, one cable is always in a low-friction state relative to the one-way friction slider, while the other cable is in a high-friction state relative to the one-way friction slider.

2. The directional limiting sliding mesh cable node connection device according to claim 1, characterized in that: The unidirectional friction slider is provided with several uniformly distributed textures, and the two opposite sliding friction surfaces of the textures have a difference in the coefficient of friction.

3. The directional limiting sliding mesh cable node connection device according to claim 1, characterized in that: It also includes a stainless steel sleeve, which includes two semi-circular sleeves. The two semi-circular sleeves are provided with sleeve buckles. The two semi-circular sleeves surround the cable and are locked with bolts. The stainless steel sleeve is slidably disposed in the cable groove.

4. The directional limiting sliding mesh cable node connection device according to claim 3, characterized in that: The sleeve locking buckle is located outside the cable groove, and the sleeve locking buckle is used to limit the sliding of the stainless steel sleeve.

5. The directional limiting 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 quadrilateral.

6. The directional limiting sliding mesh cable node connection device according to claim 1, characterized in that: It also includes several intermediate support stiffening ribs, which are vertically connected to the intermediate support plate and are laterally connected to the side of the intermediate web plate.

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

8. The directional limiting sliding mesh cable node connection device according to claim 1, characterized in that: The middle support plate has a fall arrestor hole, and a simple fall arrestor buckle is connected to the fall arrestor hole.

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