Connecting structure of bridge and distribution box

Abstract

The utility model discloses a bridge and distribution box connection structure, which comprises a bridge body, the bridge body is connected with a distribution box, and the distribution box is provided with a reserved wire inlet for connecting a cable; a bending part and a vertical line groove which are connected in sequence are formed on the bridge body; the bending part is attached to and surrounds the wire inlet reserved opening, the plane where the wire inlet reserved opening is located is perpendicular to the vertical line groove, the outer included angle between the bending part and the plane where the wire inlet reserved opening is located is theta, and theta belongs to [130 degrees, 150 degrees]; the cable passes through the vertical line groove, and the bending part is electrically connected to the distribution box. A cable clamp is arranged on the inner wall of the vertical line groove and used for fixing the cable. After the cable is fixed, the bending part is used for expanding the local bending radius of the cable. The technical scheme of the utility model aims to slow down the aging speed of the cable and reduce the risk of electric leakage.

Description

Technical Field

[0001] This utility model relates to the field of distribution box technology, and in particular to a connection structure between a cable tray and a distribution box. Background Technology

[0002] A distribution box is a device used for power distribution and control, primarily for introducing power into a building and distributing electrical energy to various electrical devices. Cable trays typically serve as structures to support cables introduced or led out of the distribution box. In existing technology, the installation of cable trays causes excessive bending of the cables leading out of the distribution box, resulting in cable compression and excessively rapid local temperature rise at bending points. This significantly accelerates the aging of the cable insulation and increases the risk of leakage. Utility Model Content

[0003] The purpose of this utility model is to provide a connection structure between a cable tray and a distribution box, which aims to slow down the aging of cables and reduce the risk of leakage.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A cable tray and distribution box connection structure includes a cable tray body, which is connected to a distribution box, wherein the distribution box has an inlet reserved for cable access;

[0006] The cable tray body has a series of connected bent portions and vertical grooves; the bent portions are arranged to fit and surround the inlet port, the plane of the inlet port is perpendicular to the vertical groove, and the angle between the bent portions and the plane of the inlet port is θ, where θ∈[130°, 150°].

[0007] The cable passes through the vertical cable tray and is electrically connected to the distribution box via the bend. A wire clamp is provided on the inner wall of the vertical cable tray to fix the cable. After the cable is fixed, the bend is used to increase the local bending radius of the cable.

[0008] In one embodiment, a rubber pad is further provided on the inner side of the bend, the rubber pad being used to protect the cable.

[0009] In one embodiment, the vertical cable tray is further provided with ventilation holes, and the inlet cable pre-reserved port is further provided with a dust cover. The dust cover forms heat dissipation holes, and the heat inside the distribution box is dissipated from the ventilation holes through the heat dissipation holes.

[0010] In one embodiment, a fan assembly is also provided in the vertical groove, and the fan assembly is located close to the ventilation hole.

[0011] In one embodiment, the cable tray body is a three-sided enclosed structure, and is sequentially formed with a first enclosed surface, a second enclosed surface, and a third enclosed surface;

[0012] The first enclosing surface and the third enclosing surface are sequentially formed with the vertical groove and the bent portion;

[0013] Ventilation holes are formed on the second enclosure surface, and the fan assembly is installed on the inner side of the second enclosure surface.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This utility model's technical solution designs the cable tray body as a continuous structure including a bending section (outer included angle θ∈[130°,150°]) and a vertical cable trough. The bending section fits the pre-reserved inlet of the distribution box, and its plane is perpendicular to the vertical cable trough. The inclined angle of the bending section replaces the traditional 90° right-angle connection, increasing the local bending radius of the cable. At the same time, the clamps in the vertical cable trough rigidly fix the cable, avoiding the superimposed compression caused by the drooping of multiple large-section cables due to their own weight. This solves the problems of conductor stress concentration, insulation shear damage, and abnormal local temperature rise caused by excessive bending of cables in the background technology, reduces the aging rate of the cable insulation layer, and avoids the risk of leakage maintenance caused by insufficient bending radius. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0018] Figure 1 A schematic diagram of a prior art connection structure between cable trays and distribution boxes;

[0019] Figure 2 This is a schematic diagram of an embodiment of the cable tray and distribution box connection structure of this utility model;

[0020] Figure 3This is a front view of an embodiment of the cable tray and distribution box connection structure of this utility model;

[0021] Figure 4 This is a reference diagram showing the usage state of an embodiment of the cable tray and distribution box connection structure of this utility model;

[0022] Figure 5 for Figure 2 A structural diagram from another angle;

[0023] Illustrations: 100, Cable tray body; 102, Bending section; 103, Vertical cable groove; 104, Cable clamp; 105, Rubber pad; 106, Ventilation hole; 110, First enclosure surface; 120, Second enclosure surface; 130, Third enclosure surface;

[0024] 200. Distribution box; 201. Incoming line reserved port; 202. Dust cover; 202a. Heat dissipation hole; 203. Fan assembly;

[0025] 300. Cable. Detailed Implementation

[0026] To make the technical objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component centrally located at the same time.

[0028] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] This utility model embodiment provides a connection structure between a cable tray and a distribution box.

[0030] Please see Figures 1 to 5In a specific embodiment of this utility model, the cable tray and distribution box connection structure includes a cable tray body 100, which is connected to a distribution box 200, and the distribution box 200 has an inlet reserved port 201 for connecting a cable 300.

[0031] The cable tray body 100 has a series of connected bending portions 102 and vertical grooves 103; the bending portions 102 are arranged to fit and surround the inlet port 201, the plane of the inlet port 201 is perpendicular to the vertical groove 103, and the external angle between the bending portions 102 and the plane of the inlet port 201 is θ, where θ∈[130°, 150°];

[0032] The cable 300 passes through the vertical cable tray 103 and is electrically connected to the distribution box 200 via the bend 102. A wire clamp 104 is provided on the inner wall of the vertical cable tray 103 for fixing the cable 300. After the cable 300 is fixed, the bend 102 is used to expand the local bending radius of the cable 300.

[0033] It is understood that the present invention designs the cable tray body 100 as a continuous structure including a bending part 102 (with an external included angle θ ∈ [130°, 150°]) and a vertical cable trough 103. The bending part 102 fits into the inlet reserved port 201 of the distribution box 200 and its plane is perpendicular to the vertical cable trough 103. The tilt angle of the bending part 102 replaces the traditional 90° right angle connection, thereby increasing the local bending radius of the cable 300. At the same time, the wire clamp 104 in the vertical cable trough 103 rigidly fixes the cable 300, avoiding the superimposed compression caused by the drooping of multiple large cross-section cables 300 due to their own weight. This solves the problems of conductor stress concentration, insulation layer shearing damage and abnormal local temperature rise caused by excessive bending of the cable 300 in the background art, reduces the aging rate of the cable 300 insulation layer, and avoids the risk of leakage maintenance caused by insufficient bending radius.

[0034] Specifically, the cable tray body 100 is mainly used to carry the cable 300. Optionally, the cable tray body 100 is made of galvanized steel sheet or aluminum alloy.

[0035] Specifically, the cable tray body 100 includes a bending portion 102 and a vertical groove 103; the bending portion 102 can be an inclined transition section or an arc-shaped smooth transition section of the cable tray body 100. Preferably, to reduce processing difficulty and save processing costs, the bending portion 102 is an inclined transition section.

[0036] Preferably, the angle between the bent portion 102 and the plane containing the inlet port 201 is θ, where θ is 135°, so as to maximize the bending radius of the cable 300.

[0037] It should also be noted that when the included angle θ is 135°, since the vertical groove 103 is perpendicular to the plane where the inlet reserved opening 201 is located, the included angle between the vertical groove 103 and the outer side of the bending part 102 is also 135 degrees.

[0038] Specifically, in this embodiment, the incoming line reserved opening 201 is an opening on the top of the distribution box 200 for vertical incoming lines.

[0039] It should also be noted that, in this embodiment, the bending portion 102 is along the direction of the vertical groove 103, and the projection of the bending portion 102 is located outside the vertical groove 103.

[0040] Please see Figure 4 and Figure 5 In one specific embodiment, a rubber pad 105 is also provided on the inner side of the bent portion 102, and the rubber pad 105 is used to protect the cable 300.

[0041] It is understood that the inner side of the bend 102 refers to the inner surface area of ​​the cable tray body 100 facing the cable 300 during the bend. Optionally, the rubber pad 105 can be continuously laid along the entire length of the inner wall of the bend 102, covering the entire contact surface of the cable 300, or it can be applied only in areas where the cable 300 is under concentrated stress, such as the upper and lower ends of the bend 102. The specific application of the rubber pad 105 is to buffer the mechanical impact between the cable 300 and the metal cable tray body 100, thereby protecting the cable 300, preventing the insulation sheath of the cable 300 from rubbing against the metal edge of the bend 102, and thus preventing leakage caused by damage to the cable sheath.

[0042] Please see Figure 2 , Figure 4 and Figure 5 In one embodiment, the vertical cable tray 103 is further provided with a ventilation hole 106, and the cable inlet 201 is further provided with a dust cover 202. The dust cover 202 forms a heat dissipation hole 202a, and the heat inside the distribution box 200 is dissipated from the ventilation hole 106 through the heat dissipation hole 202a.

[0043] It is understood that the dust cover 202 is used to reduce the entry of impurities into the distribution box 200 and prevent the accelerated aging of the equipment performance inside the distribution box 200; the heat dissipation hole 202a is used for the dissipation of heat from the distribution box 200, and the ventilation hole 106 is used for ventilation and heat dissipation to prevent the heat inside the cable tray body 100 from being too high and to slow down the aging rate of the cable 300 at the bend.

[0044] Please continue reading. Figure 5A fan assembly 203 is also provided in the vertical groove 103, and the fan assembly 203 is located near the ventilation hole 106.

[0045] Understandably, the fan assembly 203 is used to draw in heat discharged from the heat dissipation hole 202a and heat generated at the bend of the cable 300, and to discharge the heat through the ventilation hole 106. Therefore, by increasing the airflow velocity inside the cable tray body 100, the fan assembly 203 reduces the temperature rise range at the cable 300 node and slows down the aging of the cable 300 at the bend due to increased temperature.

[0046] Furthermore, in the present invention, the cable tray body 100 is a U-shaped open channel, a C-shaped semi-closed or fully enclosed cable tray.

[0047] Preferably, please refer to Figure 4 and Figure 5 The cable tray body 100 has a three-sided enclosed structure, and is formed in sequence with a first enclosed surface 110, a second enclosed surface 120 and a third enclosed surface 130;

[0048] The first enclosing surface 110 and the third enclosing surface 130 are sequentially formed with the vertical groove 103 and the bending portion 102;

[0049] Ventilation holes 106 are formed on the second enclosure surface 120, and the fan assembly 203 is installed on the inner side of the second enclosure surface 120.

[0050] Understandably, this utility model's technical solution integrates the vertical cable tray 103, the bending portion 102, and the heat dissipation system into the same cable tray body 100 through a three-sided enclosed structure design. The second enclosed surface 120 centrally arranges ventilation holes 106 and fan assemblies 203, allowing forced airflow to directly act on the densely packed area of ​​the cables 300. Simultaneously, the second enclosed surface 120 ensures that the structure of the first enclosed surface 110 and the third enclosed surface 130 maintains the stability of the bending portion 102 angle θ during long-term use. Furthermore, the rubber pad 105 eliminates the risk of contact with sharp metal edges, systematically solving the problems of overheating, aging, and leakage tripping of the cables 300 caused by loose structure and inefficient heat dissipation in the prior art.

[0051] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A connection structure between a cable tray and a distribution box, characterized in that, The bridge body is connected with a distribution box, and the distribution box is formed with an incoming line reservation port for accessing a cable; The bridge body is formed with a bending part and a vertical wire slot connected in sequence; the bending part is arranged in close contact with and surrounds the incoming line reservation port; the plane where the incoming line reservation port is located is perpendicular to the vertical wire slot; the outer included angle between the bending part and the plane where the incoming line reservation port is located is θ, wherein θ ∈ [130°, 150°]; The cable is electrically connected to the distribution box through the vertical wire slot and the bending part; the inner wall of the vertical wire slot is provided with a wire clamp for fixing the cable; after the cable is fixed, the bending part is used for expanding the local bending radius of the cable.

2. The bridge and distribution box connection structure according to claim 1, characterized by The inner side of the bending part is further provided with a rubber pad for protecting the cable.

3. The bridge and distribution box connection structure according to claim 2, characterized by The vertical wire slot is further provided with a ventilation hole, and the incoming line reservation port is further provided with a dustproof cover formed with a heat dissipation hole; the heat inside the distribution box is dissipated from the ventilation hole through the heat dissipation hole.

4. The bridge and distribution box connection structure according to claim 3, characterized by The vertical wire slot is further provided with a fan assembly arranged close to the ventilation hole.

5. The bridge and distribution box connection structure according to claim 4, characterized by The bridge body is a three-sided enclosure structure and is formed with a first enclosure surface, a second enclosure surface and a third enclosure surface in sequence; The first enclosure surface and the third enclosure surface are formed with the vertical wire slot and the bending part in sequence; The second enclosure surface is formed with a ventilation hole, and the fan assembly is mounted on the inner side of the second enclosure surface.

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