Looped network box with sunken installation structure

Abstract

The utility model belongs to the technical field of electrical equipment, and particularly relates to a ring main unit with a sunken installation structure. Comprising a box body and a cable chamber arranged in the box body, and further comprises a sunken mounting platform arranged at the bottom of the cable chamber and forming a mounting groove for accommodating electrical elements; and the cable fixing device is arranged in the cable chamber, can be horizontally and movably arranged above the sunken mounting platform, and is provided with a cable clamping part capable of rotating relative to a supporting part of the cable fixing device. According to the technical scheme, the ring main unit structure which can effectively expand the vertical operation space of the cable chamber and is convenient for maintaining elements below can be obtained.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electrical equipment technical field, especially a ring net box with sunken installation structure. BACKGROUND

[0002] The ring net box is a key equipment for cable line connection, fault isolation and load distribution in a power distribution network, and the cable chamber bears the connection, fixation and protection functions of incoming and outgoing cables, which is crucial to the reliable operation of the line.

[0003] The space of the cable chamber of the existing ring net box is usually compact, and the cable fixing device and the electrical elements below are arranged in layers. When the bottom elements need to be repaired or replaced, the fixed cables and supports above will seriously hinder the operation space and the line of sight, resulting in difficult maintenance, low efficiency and safety risks. Therefore, there is an urgent need for a ring net box structure that can effectively expand the vertical operation space of the cable chamber and facilitate the maintenance of the elements below. UTILITY MODEL CONTENTS

[0004] The utility model discloses a sunken installation platform is set up to accommodate electrical elements, and the cable fixing device above has horizontal movement and rotation functions, thereby realizing flexible expansion of the vertical operation space of the cable chamber to solve the problems mentioned in the above background technology.

[0005] The utility model discloses a ring net box with sunken installation structure, including box and being located in the cable chamber in the box, still including:

[0006] The sunken installation platform is arranged at the bottom of the cable chamber, and the sunken installation platform forms an installation groove for accommodating electrical elements.

[0007] The cable fixing device is arranged in the cable chamber, and the cable fixing device is horizontally movably arranged above the sunken installation platform and has a cable clamping part that can rotate relative to the support part.

[0008] The utility model further sets up, the cable fixing device includes:

[0009] The sliding adjustment mechanism includes a clamping seat and a sliding guide rail arranged on the top of the sunken installation platform, and the clamping seat and the sliding guide rail are detachably and slidably connected.

[0010] The rotatable clamping mechanism is arranged on the clamping seat and constitutes the cable clamping part.

[0011] The utility model further sets up that the sliding guide rail is composed of the two side edges of the top of the sunken installation platform.

[0012] The utility model further sets up, a plurality of fixed holes are established to the sliding guide rail along its length direction, the both ends of the clamping seat are equipped with the through hole corresponding with the fixed hole, and the connecting piece passes through the through hole and the fixed hole selected in sequence, and the fixing of the clamping seat at different positions on the sliding guide rail is realized.

[0013] The utility model further sets up, the rotatable clamping mechanism includes first clamping body and second clamping body, the first clamping body is rotatably connected with the clamping seat, and the second clamping body is detachably connected with the first clamping body.

[0014] The utility model further sets up, the first clamping body is rotatably connected with the clamping seat through an elastic ball, is equipped with rotating hole on the clamping seat, and the elastic ball is fixed on the first clamping body and is embedded in the rotating hole through interference fit.

[0015] The utility model further sets up, is equipped with limit hole on the clamping seat, when the rotatable clamping mechanism rotates to the preset angle, realizes the temporary fixing of this rotation angle through the cooperation of the positioning piece and the limit hole.

[0016] Through adopting the above technical scheme, the utility model can obtain the beneficial effects that:

[0017] 1. through the cooperation of the sunken installation platform and the horizontally movable cable fixing device, direct, unobstructed access to the electrical elements at the bottom of the cable chamber is realized, and the convenience and safety of maintenance operation are improved.

[0018] 2. through the cooperation of the sliding guide rail formed by the platform edge and the clamping seat, continuous, flexible adjustment and reliable locking of the cable fixing position are realized, and the space adaptability and operation efficiency during installation and maintenance are improved.

[0019] 3. through the interference fit of the elastic ball and the rotating hole, the cable clamping part can be flexibly converted between the horizontal and vertical states, and the on-demand release capability of the internal space of the cable chamber is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the three-dimensional structure schematic diagram of the utility model ring main unit;

[0021] Figure 2 It is the first three-dimensional structure schematic diagram of the utility model cable chamber;

[0022] Figure 3 It is the second three-dimensional structure schematic diagram of the utility model cable chamber;

[0023] Figure 4 It is the section structure schematic diagram of the utility model.

[0024] The figure mark is: 1, box; 2, cable chamber; 3, sunken mounting platform; 4, mounting groove; 5, cable fixing device; 50, sliding adjustment mechanism; 501, clamping seat; 502, sliding guide rail; 51, rotatable clamping mechanism; 511, first clamping body; 512, second clamping body; 6, fixing hole; 7, through hole; 8, connecting piece; 9, elastic ball; 10, rotating hole; 11, limiting hole; 12, positioning piece. DETAILED DESCRIPTION

[0025] The utility model will be further described in specific embodiments in combination with the drawings, referring to Figures 1-4 :

[0026] Example 1:

[0027] This embodiment provides a ring main unit with sunken mounting structure, including box 1 and the cable chamber 2 in the box 1, still including:

[0028] Sunken mounting platform 3 is arranged at the bottom of the cable chamber 2, and the sunken mounting platform 3 forms the mounting groove 4 for accommodating electrical elements;

[0029] Cable fixing device 5 is arranged in the cable chamber 2, and the cable fixing device 5 is movably arranged above the sunken mounting platform 3, and has a cable clamping part capable of rotating relative to the support part.

[0030] The box 1 of the ring main unit contains a cable chamber 2 for installing and connecting power cables. The bottom of the cable chamber 2 is provided with a sunken mounting platform 3. The platform is a downwardly recessed area formed by stamping, bending or welding processing of the bottom plate of the cable chamber 2, which is configured as a top-open groove structure, and its function is to provide a special installation space for current transformers and other electrical elements, so that the main part of these devices is located below the conventional floor plane of the cable chamber 2, thereby preliminarily releasing the upper space.

[0031] Above the sunken mounting platform 3, a set of cable fixing device 5 with multi-degree-of-freedom adjustment function is arranged. The overall function of the device is to reliably clamp the cable, and can flexibly change its position and posture when needed to avoid interference with the maintenance operation of the lower equipment. The device is specifically composed of sliding adjustment mechanism 50 and rotatable clamping mechanism 51 two parts.

[0032] The sliding adjustment mechanism 50 is the part that enables the overall horizontal movement of the cable fixing device 5. It consists of a long strip-shaped plate-like holder 501 and a sliding guide rail 502 as its movement track. The sliding guide rail 502 is structurally a protrusion or guide edge naturally extended or processed from the two side edges of the top of the aforementioned sunken mounting platform 3, and is located at the two sides of the opening of the mounting groove 4. The holder 501 spans above the mounting platform, and its two ends are detachably connected with the sliding guide rail 502 through connecting pieces 8. The specific connection and fixing method is that on the edge of the sliding guide rail 502, a plurality of circular fixing holes 6 are processed along the length direction at intervals; and on the two ends of the holder 501, corresponding circular through holes 7 are provided. When fixing is needed, a bolt is used as the connecting piece 8, which is sequentially inserted through the through hole 7 of the holder 501 and screwed into a selected fixing hole 6 on the sliding guide rail 502, so that the holder 501 can be firmly locked at this position; when moving is needed, the bolt is loosened, and the holder 501 can be slid along the guide rail to a new position and then locked, so as to realize the continuous adjustment of the horizontal position of the cable fixing point.

[0033] The rotatable clamping mechanism 51 is directly responsible for clamping the cable, and is installed on the aforementioned holder 501. The mechanism mainly includes a first clamping body 511 and a second clamping body 512. The first clamping body 511 is connected with the holder 501 through a special rotating connection structure near one end of the holder 501. The specific structure of the rotating connection is that a ball made of high-elastic rubber or other elastic material, called elastic ball 9, is fixed on the inner side of the first clamping body 511 by gluing or other methods; and a spherical rotating hole 10 is processed at the corresponding position of the holder 501 and the first clamping body 511. During installation, the elastic ball 9 on the first clamping body 511 is forced to be pressed into the rotating hole 10 of the holder 501, and an interference fit is generated between the slight deformation of the elastic ball 9 and the hole wall, so that the first clamping body 511 can be rotated at multiple angles relative to the holder 501, and can be kept at any angle by relying on the friction force when there is no external force. The second clamping body 512 is detachably connected with the first clamping body 511 through a bolt, and when the two are closed, the inner wall is usually lined with a rubber pad, together forming a clamping space for holding and fixing the cable. In order to further ensure the stability in the maintenance attitude, one or more circular limiting holes 11 are also provided on the holder 501. When the operator rotates the first clamping body 511 and the second clamping body 512 together with the cable to a pre-set maintenance angle close to vertical, a metal pin can be used as a positioning piece 12, which is inserted into the corresponding hole on the first clamping body 511 and the limiting hole 11 of the holder 501, so as to temporarily fix the rotating angle and prevent it from rotating back due to accidental collision or vibration.

[0034] Through the technical scheme, during normal operation of the ring main unit, the cable is fixed in the rotatable clamping mechanism 51 in a horizontal state, and the entire cable fixing device 5 is locked in the conventional working position of the sliding guide rail 502 through the clamping seat 501. When it is necessary to overhaul, replace or wire the current transformer installed in the sunken platform, the operator first loosens the connecting bolts at both ends of the clamping seat 501, and smoothly slides the entire cable fixing device 5 along the horizontal guide rail to one side of the cable chamber 2. This operation directly leaves the entire vertical space directly above the current transformer, so that the operator's line of sight, hands and tools can freely contact and operate the target equipment, solving the shielding problem caused by the immobility of the cable support in the traditional structure. If the maintenance work requires more open and interference-free space, for example, when a large cable terminal head needs to be replaced or a large special tool needs to be used, the operator can further operate: loosen the bolts connecting the second clamping body 512, take the elastic ball 9 embedded in the rotating hole 10 as the rotation axis, rotate the first clamping body 511, the second clamping body 512 and the clamped cable as a whole upward until they are in a nearly vertical state. Then, insert the positioning pin into the limiting hole 11, and the posture can be temporarily locked. At this time, the projection area of the cable fixing device 5 in the horizontal direction reaches the minimum, providing the maximum continuous operation space for the central region of the cable chamber 2. After all the maintenance work is completed, the operator only needs to operate in the reverse order, i.e. remove the positioning pin, rotate the clamping mechanism back to the horizontal position and tighten, and then slide the entire device back to the initial position and lock, so that the ring main unit can return to the standard operating state.

[0035] The above embodiments are only preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A ring main unit with a sunken installation structure, comprising a unit body (1) and a cable compartment (2) disposed within the unit body (1), characterized in that, Also includes: A sunken installation platform (3) is located at the bottom of the cable chamber (2), and the sunken installation platform (3) forms an installation groove (4) for accommodating electrical components. A cable fixing device (5) is provided in the cable chamber (2). The cable fixing device (5) is horizontally movable above the sunken installation platform (3) and has a cable clamping part that can rotate relative to its supporting part.

2. A ring main unit with a sunken installation structure according to claim 1, characterized in that, The cable fixing device (5) includes: The sliding adjustment mechanism (50) includes a clamp (501) and a sliding guide rail (502) located on the top of the sunken installation platform (3). The clamp (501) and the sliding guide rail (502) are detachably slidably connected. A rotatable clamping mechanism (51) is provided on the clamp (501) and constitutes the cable clamping part.

3. A ring main unit with a sunken installation structure according to claim 2, characterized in that, The sliding guide rail (502) is formed by the two side edges of the top of the sunken installation platform (3).

4. A ring main unit with a sunken installation structure according to claim 3, characterized in that, The sliding guide rail (502) has multiple fixing holes (6) along its length direction. The clamp (501) has through holes (7) at both ends corresponding to the fixing holes (6). The connector (8) passes through the through holes (7) and the selected fixing holes (6) in sequence to fix the clamp (501) at different positions on the sliding guide rail (502).

5. A ring main unit with a sunken installation structure according to claim 2, characterized in that, The rotatable clamping mechanism (51) includes a first clamping body (511) and a second clamping body (512). The first clamping body (511) is rotatably connected to the clamping seat (501), and the second clamping body (512) is detachably connected to the first clamping body (511).

6. A ring main unit with a sunken installation structure according to claim 5, characterized in that, The first clamp (511) is rotatably connected to the clamp (501) via an elastic ball (9). The clamp (501) is provided with a rotating hole (10). The elastic ball (9) is fixed on the first clamp (511) and is embedded in the rotating hole (10) by an interference fit.

7. A ring main unit with a sunken installation structure according to claim 2, characterized in that, The clamp (501) is provided with a limiting hole (11). When the rotatable clamping mechanism (51) rotates to a preset angle, the positioning member (12) cooperates with the limiting hole (11) to temporarily fix the rotation angle.

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