Ring main unit structure

Abstract

The utility model discloses a ring main unit structure which comprises a three-unit ring main unit, an ascending flanged base is arranged at the bottom of the three-unit ring main unit, and a deepened backpack is arranged on the rear portion of the three-unit ring main unit. Left and right backpack top plates and a middle backpack top plate are arranged at the top of the deepened backpack, a pressure relief plate is arranged on the middle backpack top plate, and four detachable sealing plates are arranged on the left and right sides of the deepened backpack; a first unit incoming cable, a second unit incoming cable, a third unit outgoing cable, a first unit PT mutual inductor, a second unit PT mutual inductor and a third unit PT mutual inductor are arranged in the deepened backpack. According to the utility model, cabinet top double wire inlet is satisfied, and wire inlet cables can be conveniently installed on site; three PT transformers can be placed, and later maintenance is facilitated; the cabinet body is provided with the pressure relief plate, so that the safety of operators is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of medium and high voltage equipment, and in particular to a ring main unit structure. Background Technology

[0002] A set of three-unit ring main unit is placed in a compact transformer substation. The three-unit ring main unit needs to accommodate two incoming lines at the top and outgoing lines at the rear, with each of the three units equipped with a PT transformer. The conventional practice is to install the incoming cables at the rear of the unit. However, the small distance between the rear of the unit and the transformer substation partition makes it inconvenient to install the incoming cables on site, and the large size of the PT transformer makes it impossible to place it in the cable compartment.

[0003] Therefore, it is necessary to develop a new type of ring main unit structure to facilitate the convenient installation of incoming cables on site. Utility Model Content

[0004] Purpose of the utility model: To address the shortcomings and defects of the existing technology, this utility model provides a ring main unit structure that allows for dual incoming lines at the top of the unit, facilitating the installation of incoming cables on-site; it also accommodates the placement of three PT transformers for convenient future maintenance; and the unit is equipped with a pressure relief plate to ensure the safety of operators.

[0005] Technical Solution: This utility model discloses a ring main unit structure, characterized in that it includes a three-unit ring main unit, a riser base at the bottom of the three-unit ring main unit, and a deepened backpack at the rear of the three-unit ring main unit; the top of the deepened backpack is provided with left and right top plates and a middle top plate, the middle top plate is provided with a pressure relief plate, and the left and right sides of the deepened backpack are provided with four detachable sealing plates; the deepened backpack contains a first unit incoming cable, a second unit incoming cable, a third unit outgoing cable, a first unit PT transformer, a second unit PT transformer, and a third unit PT transformer.

[0006] The three-unit ring network cabinet has a handle interface on the side of the low-voltage compartment above it, which is connected to a remote control handle.

[0007] The three-unit ring network cabinet is equipped with a handle bracket on its side, and an L-shaped mechanical operating handle is mounted on the handle bracket.

[0008] The backpack has cable holes on the left and right top plates and pressure relief holes on the middle top plate for installing a pressure relief plate.

[0009] The pressure relief plate is connected to the top plate of the backpack by several plastic screws.

[0010] The sealing plate is equipped with a handle.

[0011] The first unit incoming cable enters from the top left side of the deepened backpack, the second unit incoming cable enters from the top right side of the deepened backpack, and the third unit outgoing cable exits from the rear of the deepened backpack.

[0012] The first PT transformer unit is installed facing left, the second PT transformer unit is installed facing right, and the third PT transformer unit is installed at the front of the raised base.

[0013] The front panel of the deepened backpack has an observation window, which is made of plexiglass.

[0014] Beneficial effects: Compared with the prior art, this utility model has the following significant advantages: This utility model meets the requirements of dual incoming lines at the top of the cabinet, and the incoming cables can be easily installed on site; it can accommodate the placement of 3 PT transformers, which is convenient for later maintenance; the cabinet is equipped with a pressure relief plate, and an aviation plug is installed in the low-voltage compartment, which can remotely control the switch opening and closing via a button from 5 meters away, ensuring the safety of operators. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a structural diagram of the left and right top panels, the middle top panel, and the pressure relief plate of the backpack according to this utility model.

[0017] Figure 3 This is a schematic diagram of the fixing structure of the pressure relief plate of this utility model;

[0018] Figure 4 This is a structural schematic diagram of the cable routing of this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the four sealing plates of this utility model;

[0020] Figure 6 This is a schematic diagram of the handle interface and remote control handle of this utility model;

[0021] Figure 7 This is a schematic diagram of the structure of the L-shaped mechanical operating handle and handle bracket of this utility model;

[0022] Figure 8 This is a schematic diagram of the structure of the three PT transformers of this utility model;

[0023] Figure 9 This is a schematic diagram of the observation window and the plexiglass structure of this utility model;

[0024] In the diagram, 1 is a three-unit ring main unit; 2 is a raised platform; 3 is a deepened backpack; 4 are the left and right top panels of the backpack; 5 is the middle top panel of the backpack; 6 is a pressure relief plate; 7 is a sealing plate; 8 is a handle; 101 is the incoming cable of the first unit; 102 is the incoming cable of the second unit; 103 is the outgoing cable of the third unit; 111 is the handle interface; 112 is the remote control handle; 12 is the L-shaped mechanical operating handle; 13 is the handle bracket; 141 is the PT transformer of the first unit; 142 is the PT transformer of the second unit; 143 is the PT transformer of the third unit; 15 is the observation window; and 16 is plexiglass. Detailed Implementation

[0025] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] The ring main unit structure of this utility model includes a three-unit ring main unit 1, a riser 2 at the bottom of the three-unit ring main unit 1, and a deepened backpack 3 at the rear of the three-unit ring main unit 1; the top of the deepened backpack 3 is provided with left and right top plates 4 and a middle top plate 5, the middle top plate 5 is provided with a pressure relief plate 6, and the left and right sides of the deepened backpack 3 are provided with four detachable sealing plates 7; the deepened backpack 3 is provided with a first unit incoming cable 101, a second unit incoming cable 102, a third unit outgoing cable 103, a first unit PT transformer 141, a second unit PT transformer 142, and a third unit PT transformer 143.

[0027] The three-unit ring main unit 1 of this utility model has a handle interface 111 on the side of the low-voltage compartment above, which is connected to a remote control handle 112. A handle bracket 13 is provided on the side of the three-unit ring main unit 1, and an L-shaped mechanical operating handle 12 is mounted on the handle bracket 13. Cable holes are provided on the left and right top plates 4 of the backpack, and a pressure relief hole for installing a pressure relief plate 6 is provided on the top plate 5 of the backpack. The pressure relief plate 6 is connected to the top plate 5 of the backpack by several plastic screws. A handle 8 is provided on the sealing plate 7. The first unit incoming cable 101 enters from the top left side of the deepened backpack 3, the second unit incoming cable 102 enters from the top right side of the deepened backpack 3, and the third unit outgoing cable 103 exits from the rear of the deepened backpack 3. The first unit PT transformer 141 is installed facing left, the second unit PT transformer 142 is installed facing right, and the third unit PT transformer 143 is installed at the front of the riser 2. An observation window 15 is provided on the front sealing plate of the deepened backpack 3, and an acrylic glass 16 is provided on the observation window 15.

[0028] During use, a riser is added to the bottom of the ring main unit, and a deepened backpack is installed at the rear. The left and right sides of the backpack are made into removable panels, with the sides serving as operating surfaces for later cable splicing and PT maintenance. Handles are provided on the panels for easy removal during disassembly. Cable holes are designed on the left and right sides of the top of the backpack. The first unit's cable entry is on the left side of the top of the backpack, and the second unit's cable entry is on the right side of the top of the backpack. When installing incoming cables on site, operations can be performed from the left and right sides, or by entering the backpack.

[0029] The first unit's pressure relief valve (PT) is placed on the left inner side of the backpack, the second unit's on the right inner side, and the third unit's at the front. A pressure relief vent is located in the middle of the backpack's top panel. In the event of a ring main unit failure, pressure can be released from the top, ensuring the safety of personnel operating in front of the unit. The pressure relief plate is fixed to the top panel with plastic screws, and a series of small squares are added to the pressure relief plate to create a weak point area, ensuring easy pressure release in case of a failure.

[0030] A handle interface is installed on the right side panel of the low-voltage compartment of the ring main unit, allowing maintenance personnel to operate the unit remotely with a remote handle, ensuring personnel safety. An L-shaped mechanical operating handle bracket is located on the left side of the ring main unit for easy access to the handle tools during manual mechanical operation. An observation window is designed inside the deepened backpack for checking the status of the ring main unit's grounding switch (open or closed).

Claims

1. A ring main unit structure, characterized by: The device includes a three-unit ring main unit (1), a raised base (2) at the bottom of the three-unit ring main unit (1), and a deepened backpack (3) at the rear of the three-unit ring main unit (1). The deepened backpack (3) has left and right top plates (4) and a middle top plate (5) at the top. The middle top plate (5) has a pressure relief plate (6). The deepened backpack (3) has four detachable sealing plates (7) on the left and right sides. The deepened backpack (3) contains a first unit incoming cable (101), a second unit incoming cable (102), a third unit outgoing cable (103), a first unit PT transformer (141), a second unit PT transformer (142), and a third unit PT transformer (143).

2. The ring main unit structure according to claim 1, characterized in that: The three-unit ring network cabinet (1) is provided with a handle interface (111) on the side of the low-voltage compartment above it. The handle interface (111) is connected to the remote control handle (112).

3. The ring main unit structure according to claim 1, characterized in that: The three-unit ring network cabinet (1) is provided with a handle bracket (13) on its side, and an L-shaped mechanical operating handle (12) is provided on the handle bracket (13).

4. The ring main unit structure according to claim 1, characterized in that: The backpack has cable holes on the left and right top plates (4) and pressure relief holes for installing pressure relief plates (6) on the middle top plate (5).

5. The ring main unit structure according to claim 1, characterized in that: The pressure relief plate (6) is connected to the top plate (5) of the backpack by several plastic screws.

6. The ring main unit structure according to claim 1, characterized in that: The sealing plate (7) is provided with a handle (8).

7. The ring main unit structure according to claim 1, characterized in that: The first unit incoming cable (101) enters from the top left side of the deepened backpack (3), the second unit incoming cable (102) enters from the top right side of the deepened backpack (3), and the third unit outgoing cable (103) exits from the rear of the deepened backpack (3).

8. The ring main unit structure according to claim 1, characterized in that: The first unit PT transformer (141) is installed facing left, the second unit PT transformer (142) is installed facing right, and the third unit PT transformer (143) is installed in the front position of the riser (2).

9. The ring main unit structure according to claim 1, characterized in that: The front panel of the deepened backpack (3) is provided with an observation window (15), and the observation window (15) is provided with plexiglass (16).

Images