Telescopic connecting structure of groove type cable bridge

Abstract

The utility model discloses a telescopic connecting structure of a groove-type cable bridge, which relates to the technical field of cable bridges, aims to solve the technical problem that the rigid fixing mode is easy to fall off and break, and comprises two fixing side clamps arranged at the end part of an external groove-type cable bridge, and a middle block arranged between the two fixing side clamps, special-shaped sleeves are fixed to the positions, close to the two sides of the groove type cable bridge, of the periphery of the middle block, the ends of the special-shaped sleeves are connected with straight sleeves, telescopic connecting structures are arranged between the special-shaped sleeves and the inner peripheries of the straight sleeves, one ends of the telescopic connecting structures are connected with extrusion fixing pieces, the extrusion fixing pieces comprise extrusion heads, and the extrusion heads are made of materials which can deform due to thermal expansion and cold contraction stress. And the extrusion head is clamped and fixed in the fixed side clamp. According to the utility model, material fatigue damage caused by stress concentration in traditional rigid connection is avoided, the abrasion rate of connecting parts can be greatly reduced by a graded unloading mechanism of the telescopic metal sheet and the extrusion head, and the overall service life of the bridge is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cable trays, and more specifically, to a telescopic connection structure of a trough cable tray. Background Technique

[0002] Most of the existing connection structures of trough cable trays adopt rigid fixing methods, such as direct bolt connection, welding, etc. Such structures lack the ability to adaptively adjust to thermal expansion and contraction deformation. When the ambient temperature rises, the metal material of the cable tray expands and elongates due to heat, and the rigid connection part generates a lateral thrust due to the inability to release stress, which may cause the connection flange to deform, the bolts to break, and even the cable tray shell to crack, forming a protective gap, allowing dust and water vapor to invade and affect the insulation performance of the cable; when the ambient temperature drops, the cable tray shrinks and generates a longitudinal tension, and the rigid connection points may become loose or detached due to stress concentration, causing the cable tray to become disconnected, seriously threatening the stability of the cable layout and the safety of system operation. For example, in a high-temperature environment such as a metallurgical workshop, the elongation of the cable tray can reach dozens of millimeters. In view of this, we propose a telescopic connection structure of a trough cable tray. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art, adapt to the actual needs, and provide a telescopic connection structure of a trough cable tray to solve the technical problem that the current rigid fixing method is prone to falling off and breaking.

[0004] To solve the above technical problems, the utility model provides the following technical solution: A telescopic connection structure of a trough cable tray, including two fixed side clamps at the end of the external trough cable tray, the two fixed side clamps are fixed to the trough cable tray by bolts, a middle block is arranged between the two fixed side clamps, special-shaped sleeves are fixed on both sides of the middle block near the trough cable tray, a straight sleeve is connected to the end of the special-shaped sleeve, a telescopic connection structure is arranged between the inner circumferences of the special-shaped sleeve and the straight sleeve, one end of the telescopic connection structure is connected with a squeezing and fixing part, the squeezing and fixing part includes a squeezing head, and the squeezing head is made of a material that can be deformed by thermal expansion and contraction stress, and the squeezing head is clamped inside the fixed side clamp.

[0005] Preferably, the special-shaped sleeve is of a V-shaped structure, the bifurcations at the two places of the special-shaped sleeve are arranged at an inclined angle with the fixed side clamp, and both ends of the bifurcation of the special-shaped sleeve are fixed to the straight sleeve.

[0006] Preferably, the telescopic connection structure includes a telescopic metal sheet, the outer circumference of the telescopic metal sheet is attached to the inner wall of the special-shaped sleeve, the telescopic metal sheet is of a wavy structure, and the telescopic metal sheet is made of an elastic metal material.

[0007] Preferably, the telescopic connection structure further includes a telescopic block which is limited and slidable with respect to the straight sleeve. One side of the telescopic block is connected with a pressing block, and one side of the pressing block is connected with the end of the telescopic metal sheet.

[0008] Preferably, the squeezing head is a gourd-shaped structure composed of multiple circles. One end of the squeezing head is connected with a connecting rod which is made of hard metal material and is connected with the telescopic block.

[0009] Preferably, the fixed side clip is provided with a gourd-shaped groove which is a gourd-shaped trough body, and there is a spare compression space between the gourd-shaped groove and the squeezing head.

[0010] Preferably, the squeezing head is made of a copper-aluminum-nickel alloy material.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. In the present utility model, the telescopic metal sheet is made of an elastic metal material and has a wavy structure. When the trough-type cable tray expands and contracts due to temperature changes, its elastic deformation can absorb and release the lateral tensile or extrusion stress, preventing the rigid connection points from directly bearing the deformation load, effectively preventing problems such as bolt fracture, flange deformation or cracking of the cable tray shell, and solving the problem of easy detachment and fracture of the rigid fixing method.

[0013] 2. In the present utility model, the squeezing head of the squeezing fixing part is made of a material sensitive to thermal expansion and contraction such as a copper-aluminum-nickel alloy. When the deformation stress exceeds the buffering limit of the telescopic metal sheet, the squeezing head undergoes plastic deformation in the gourd-shaped groove, further offsetting the residual stress and being shaped after the temperature is balanced, forming a secondary stress release mechanism to ensure that the connection structure remains stable under extreme temperatures and further solving the problem of easy detachment and fracture of the rigid fixing method.

[0014] 3. In the present utility model, the special-shaped sleeve adopts a V-shaped bifurcation structure and is obliquely connected with the fixed side clip, and cooperates with the reinforcing ribs to form a rigid support framework, which can resist external forces in non-horizontal directions (such as vibration and lateral thrust), prevent abnormal deformation of the telescopic metal sheet due to lateral force, and ensure the overall stiffness of the connection structure.

[0015] 4. In the present utility model, the telescopic block and the straight sleeve are in limit sliding fit to ensure that the telescopic process is along the axial direction of the cable tray, avoiding radial deviation; the gourd-shaped structure of the squeezing head is clamped with the gourd-shaped groove, restricting excessive displacement while releasing stress and preventing loosening or disconnection of the connection point.

[0016] The elastic telescopic design of this utility model avoids the material fatigue damage caused by stress concentration in traditional rigid connections. The graded force unloading mechanism of the telescopic metal sheet and the extrusion head can greatly reduce the wear rate of the connection components and extend the overall service life of the bridge. There is no need for manual regular adjustment or replacement of components. The dynamic balance of stress is achieved through the physical properties of the material itself. It is especially suitable for extreme environments such as metallurgical workshops and high-temperature factories, and significantly reduces the inspection frequency and maintenance costs caused by connection failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the connection structure of the utility model when in use;

[0018] Figure 2 It is a structural diagram of the utility model;

[0019] Figure 3 This is a structural diagram of a half-cut special-shaped sleeve in the present invention;

[0020] Figure 4 This is a schematic structural diagram of the telescopic connection structure in the present utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the gourd groove when it is cut open in the utility model;

[0022] Figure 6 For this utility model Figure 5 A schematic diagram of the enlarged structure of part A.

[0023] Explanation of the numbers in the figure: 1. Fixed side clamp; 2. Middle block; 3. Special-shaped sleeve; 4. Straight sleeve; 5. Telescopic connection structure; 6. Compression fixing piece; 7. Reinforcement rib;

[0024] 501, telescopic metal sheet; 502, telescopic block; 503, top pressure block;

[0025] 601, extrusion head; 602, connecting rod; 603, gourd groove. DETAILED DESCRIPTION

[0026] like Figures 1 to 6As shown in the figure, a telescopic connection structure of a trough-type cable tray according to the present utility model includes two fixed side clamps 1 at the end of the external trough-type cable tray. The two fixed side clamps 1 are fixed to the trough-type cable tray by bolts. An intermediate block 2 is arranged between the two fixed side clamps 1. Special-shaped sleeves 3 are fixed on both sides of the outer periphery of the intermediate block 2 close to the trough-type cable tray. A reinforcing rib 7 for enhancing stability is connected between the two special-shaped sleeves 3. The end of the special-shaped sleeve 3 is connected to a straight sleeve 4. The special-shaped sleeve 3 is of a V-shaped structure. The bifurcations at both places of the special-shaped sleeve 3 are arranged at an inclined angle with the fixed side clamp 1. Both ends of the bifurcation of the special-shaped sleeve 3 are fixed to the straight sleeve 4. A telescopic connection structure 5 is arranged between the inner circumferences of the special-shaped sleeve 3 and the straight sleeve 4. The telescopic connection structure 5 includes a telescopic metal sheet 501. The outer periphery of the telescopic metal sheet 501 is attached to the inner wall of the special-shaped sleeve 3. The telescopic metal sheet 501 is of a wavy structure. The telescopic metal sheet 501 is made of an elastic metal material. The telescopic connection structure 5 further includes a telescopic block 502. The telescopic block 502 is limited and slides with the straight sleeve 4. One side of the telescopic block 502 is connected to a pressing block 503. One side of the pressing block 503 is connected to the end of the telescopic metal sheet 501. The telescopic block 502 is on one side of the fixed side clamp 1.

[0027] Working principle: Due to the elasticity of the telescopic metal sheet 501 and the wavy design of the telescopic metal sheet 501, when the external trough-type cable tray undergoes thermal expansion and contraction, the distance between the two cable trays will change. Further, by pulling or squeezing the telescopic metal sheet 501, the adjustment of the distance can be realized, making it adapt to the change of the distance, and avoiding the generation of a large pulling force repeatedly, resulting in the loosening of the connection point.

[0028] It is worth introducing that the inclined distribution of the telescopic metal sheet 501 and the outer enclosure of the special-shaped sleeve 3 can play a protective role, avoiding elastic deformation when subjected to horizontal forces in directions other than the trough-type cable tray, and ensuring its stability.

[0029] Although the above can achieve the function of buffering the pulling force, the telescopic elastic force of the telescopic metal sheet 501 will also have a certain force, which will affect the connection point. In view of this point, first, the telescopic block 502 is not directly connected to the fixed side clamp 1, and a squeezing fixing part 6 is connected to one end of the telescopic connection structure 5.

[0030] The squeezing fixing part 6 includes a squeezing head 601. The squeezing head 601 is made of a material that can be deformed by thermal expansion and contraction stress. Its material is preferably a copper-aluminum-nickel alloy. The copper-based shape memory alloy has a relatively low cost and good processing performance. Although its shape memory performance is slightly inferior to that of the nickel-titanium alloy, in some application scenarios of cable trays that are sensitive to cost and do not have extremely high requirements for shape memory accuracy, it is a more suitable choice, and other materials such as copper-zinc-aluminum alloy and nickel-titanium alloy can also be selected.

[0031] The extrusion head 601 is fixed inside the fixed-side clamp 1. The extrusion head 601 has a calabash-shaped structure composed of multiple circles. One end of the extrusion head 601 is connected to a connecting rod 602. The connecting rod 602 is made of hard metal. The connecting rod 602 is connected to the telescopic block 502. The fixed-side clamp 1 is provided with a calabash groove 603. The calabash groove 603 is a calabash-shaped groove body. There is a spare compression space between the calabash groove 603 and the extrusion head 601.

[0032] Working principle: During use, when the distance between two external trough cable trays changes, a large stress will occur. This stress, combined with the elasticity of the telescopic metal sheet 501, will first undergo elastic extrusion. When the load of extrusion or tension is large, it will pull the extrusion head 601 to deform, so that it maintains an appropriate distance and offsets the force on the telescopic metal sheet 501. When the temperature is in a relatively balanced state, the extrusion head 601 is shaped. By using its own hardness and the insertion of the connecting rod 602, except for the horizontal force in the direction of the trough cable tray, the stability of its connection can be ensured, and the force of the telescopic metal sheet 501 on the connection point is reduced, avoiding loosening and falling off, which helps to extend the service life.

[0033] This telescopic connection structure breaks through the technical bottleneck of traditional rigid connections through a composite mechanism of "elastic buffer + plastic force relief + rigid protection". It not only realizes the adaptive adjustment of thermal expansion and contraction deformation, but also improves the impact resistance and reliability of the connection structure, providing an efficient solution for the safe and stable operation of trough cable trays in complex environments.

[0034] The embodiments disclosed in this utility model are preferred embodiments, but not limited thereto. Those of ordinary skill in the art can easily understand the spirit of this utility model based on the above embodiments and make different extensions and changes. As long as they do not depart from the spirit of this utility model, they are within the protection scope of this utility model.

Claims

1. A telescopic connection structure for a trough cable tray, characterized in that, The invention comprises two fixed side clamps (1) at the ends of an external trough-type cable bridge, wherein the two fixed side clamps (1) are fixed to the trough-type cable bridge by bolts, an intermediate block (2) is provided between the two fixed side clamps (1), and a special-shaped sleeve (3) is fixed to both sides of the trough-type cable bridge on the outer periphery of the intermediate block (2), the end of the special-shaped sleeve (3) is connected to a straight sleeve (4), a telescopic connection structure (5) is provided between the inner periphery of the special-shaped sleeve (3) and the straight sleeve (4), and one end of the telescopic connection structure (5) is connected to a compression fixing member (6); The extrusion fixing member (6) comprises an extrusion head (601), the extrusion head (601) being made of a material that can be deformed by thermal expansion and contraction stress, and the extrusion head (601) being fixed inside the fixed side clamp (1).

2. The telescopic connection structure of a trough cable tray according to claim 1, characterized in that The special-shaped sleeve (3) is a V-shaped structure, the bifurcations at two locations of the special-shaped sleeve (3) and the fixed side clamp (1) are arranged at an inclined angle, and both ends of the bifurcations of the special-shaped sleeve (3) are fixed to the straight sleeve (4).

3. The telescopic connection structure of a trough cable tray according to claim 2, characterized in that, The telescopic connection structure (5) comprises a telescopic metal sheet (501), the outer periphery of the telescopic metal sheet (501) is in contact with the inner wall of the special-shaped sleeve (3), the telescopic metal sheet (501) is a wavy structure, and the telescopic metal sheet (501) is made of an elastic metal material.

4. The telescopic connection structure of a trough cable tray according to claim 3, characterized in that, The telescopic connection structure (5) further comprises a telescopic block (502), the telescopic block (502) and the straight sleeve (4) are limitedly slidable, one side of the telescopic block (502) is connected to a top pressing block (503), and one side of the top pressing block (503) is connected to the end of the telescopic metal sheet (501).

5. The telescopic connection structure of a trough cable tray according to claim 4, characterized in that, The squeezing head (601) is a gourd-shaped structure composed of multiple circles. One end of the squeezing head (601) is connected to a connecting rod (602). The connecting rod (602) is made of hard metal and is connected to the telescopic block (502).

6. The telescopic connection structure of a trough cable tray according to claim 5, characterized in that, The fixed side clamp (1) is provided with a gourd groove (603), the gourd groove (603) being a gourd-shaped groove body, and a spare compression space being provided between the gourd groove (603) and the extrusion head (601).

7. The telescopic connection structure of a trough cable tray according to claim 6, characterized in that, The extrusion head (601) is made of a copper-aluminum-nickel alloy.

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