阅读说明：本技术 一种基于高压量测的环网柜 (Ring main unit based on high-voltage measurement ) 是由 董苏 安玲 董梦雅 王苗 曹杰 刘颍 赵任 刘斌 崔超奇 郭运泽 徐虎 田璐璐 于 2019-10-15 设计创作，主要内容包括：本发明提供了一种基于高压量测的环网柜,包括柜体,柜体的内部开有空腔与电缆仓,空腔的侧壁转动连接有柜门,电缆仓的侧壁转动连接有仓门；空腔的内部固定有安装板,安装板上固定有电气元件；电气元件的上下端分别连接有输入线与输出线,每根输入线与输出线的端部均贯穿到电缆仓内,并延伸至柜体外与外部导电线路串联；其中,位于电缆仓内部的输入线与安全机构相连,安全机构末端与电压传感器相连。本发明结构简单、布局合理、操作方便、安全可靠,其通过在电压传感器与输入线之间设有安全机构,使发生内部短路等极端情况时,压传感器与输入线通过安全机构进行断开,不影响线路的正常运行,保障在高压环境中运行的安全性与可靠性。(The invention provides a high-voltage measurement-based ring main unit, which comprises a cabinet body, wherein a cavity and a cable bin are formed in the cabinet body, the side wall of the cavity is rotatably connected with a cabinet door, and the side wall of the cable bin is rotatably connected with a bin door; the mounting plate is fixed inside the cavity, and an electric element is fixed on the mounting plate; the upper end and the lower end of the electric element are respectively connected with an input line and an output line, and the end part of each input line and each output line penetrates through the cable bin and extends out of the cabinet body to be connected with an external conductive circuit in series; wherein, the input line that is located inside the cable chamber links to each other with safety mechanism, and the safety mechanism end links to each other with voltage sensor. The invention has simple structure, reasonable layout, convenient operation, safety and reliability, and the safety mechanism is arranged between the voltage sensor and the input line, so that when the internal short circuit and other extreme conditions occur, the voltage sensor and the input line are disconnected by the safety mechanism, the normal operation of the line is not influenced, and the safety and the reliability of the operation in a high-voltage environment are ensured.)

1. The ring main unit based on high-voltage measurement is characterized by comprising a main body (1), wherein a cavity (2) and a cable bin (3) are formed in the main body (1), the side wall of the cavity (2) is rotatably connected with a cabinet door (4), and the side wall of the cable bin (3) is rotatably connected with a bin door (5);

an installation plate (6) is fixedly connected inside the cavity (2), and an electric element (12) is fixed on the installation plate (6); the upper end and the lower end of the electric element (12) are respectively connected with a plurality of input lines (7) and output lines (8), the end parts of the input lines (7) and the output lines (8) extend towards the direction of the cable bin (3) to penetrate into the cable bin (3), finally extend to the outside of the cabinet body (1), and are connected with external conductive circuits in series; the input line (7) positioned in the cable bin (3) is particularly connected with safety mechanisms (9) arranged on the inner side wall of a bin door (5), and the tail end of each safety mechanism (9) is connected with a voltage sensor (10) fixed on the outer side wall of the bin door (5); and a signal output joint (11) is arranged on the voltage sensor (10).

2. the looped network cabinet based on high voltage measurement according to claim 1, wherein the safety mechanism (9) comprises a bottom plate (901), two ends of the bottom plate (901) are fixedly connected with insulating blocks (902), any insulating block (902) is fixedly connected with a corresponding input line (7) through a clamping block (905), and a high voltage fuse (903) is fixedly connected between the two insulating blocks (902); conductors (904) are further arranged inside the two insulation blocks (902), and two ends of the high-voltage fuse (903) are electrically connected with the corresponding input line (7) and the voltage sensor (10) through the conductors (904) respectively.

3. The looped network cabinet based on high voltage measurement according to claim 2, wherein a peeling part (701) is provided at the periphery of the input line (7) between the insulation block (902) and the clamping block (905).

4. The looped network cabinet based on high voltage measurement according to claim 1, wherein a plurality of wire clamps (15) are movably clamped on outer sidewalls of the input line (7) and the output line (8), and an inner end of each wire clamp (15) is movably clamped inside the clamping groove (16); the clamping grooves (16) are arranged on the side wall of the mounting plate (6) in an array arrangement mode.

5. The looped network cabinet based on high voltage measurement according to claim 1, wherein the side wall of the cabinet door (4) is provided with an observation window (13) and a heat dissipation grille (14).

6. the ring main unit based on high voltage measurement according to claim 1, wherein a partition plate (17) is further installed in the middle of the cable compartment (3); the cable bin (3) is divided into an upper containing bin and a lower containing bin by the partition plate (17), and the input line (7) and the output line (8) are contained in the upper containing bin and the lower containing bin respectively.

Technical Field

The invention relates to the technical field of electrical equipment, in particular to a ring main unit based on high-voltage measurement.

Background

With the continuous development of society, the urban power grid' cable is the mainstream, 10 kilovolt lines of a power distribution network are deep into a load center, and an outdoor ring main unit is also widely applied, wherein electrical elements are located in the outdoor ring main unit.

At present, 10KV electrical elements of an urban power distribution network gradually realize bidirectional metering, which means that a metering device needs to be added in a ring main unit. At this time, if the measurement points are added to the ring main unit according to the traditional high-voltage measurement scheme, the problems of narrow space of the ring main unit and incapability of installing a voltage sensor are faced; if a high-voltage metering box (cabinet) is additionally built, the problems of occupied area approval, civil engineering, complex environmental evaluation process, long construction period and high construction cost are faced. Therefore, in order to avoid the above problems, a new ring main unit based on high voltage measurement is urgently needed to be developed for ensuring the safety and reliability of operation in high voltage environment (i.e. when the extreme conditions such as internal short circuit occur, the detection device can be ensured to be cut off from the power grid without affecting the normal operation of the line).

Disclosure of Invention

the technical problem to be solved by the invention is to provide a ring main unit based on high-voltage measurement, which has the advantages of simple structure, reasonable spatial layout, convenience in operation, safety and reliability.

The invention adopts the following technical scheme to solve the technical problems:

a ring main unit based on high-voltage measurement comprises a cabinet body, wherein a cavity and a cable bin are formed in the cabinet body, a cabinet door is rotatably connected to the side wall of the cavity, and a bin door is rotatably connected to the side wall of the cable bin;

The interior of the cavity is fixedly connected with an installation plate, and an electric element is fixed on the installation plate; the upper end and the lower end of the electric element are respectively connected with a plurality of input lines and output lines, and the end parts of the input lines and the output lines extend towards the direction of the cable bin to penetrate into the cable bin, finally extend to the outside of the cabinet body and are connected with external conductive circuits in series; the input line positioned in the cable bin is particularly connected with safety mechanisms arranged on the inner side wall of the bin door, and the tail end of each safety mechanism is connected with a voltage sensor fixed on the outer side wall of the bin door; and a signal output joint is arranged on the voltage sensor.

As one of the preferable modes of the invention, the safety mechanism comprises a bottom plate, wherein both ends of the bottom plate are fixedly connected with insulating blocks, any insulating block is fixedly connected with a corresponding input line through a clamping block, and a high-voltage fuse is fixedly connected between the two insulating blocks; conductors are further arranged inside the two insulation blocks respectively, and two ends of the high-voltage fuse are electrically connected with the corresponding input line and the voltage sensor through the conductors respectively.

in a preferred embodiment of the present invention, a peeling process is performed on an outer periphery of the input line between the insulating block and the clamping block to form a peeled portion.

As one of the preferable modes of the invention, a plurality of wire clamps are movably clamped on the outer side walls of the input line and the output line, and the inner end of each wire clamp is movably clamped inside the clamping groove; the clamping grooves are arranged on the side wall of the mounting plate in an array mode.

as one preferable mode of the present invention, an observation window and a heat dissipation barrier are provided on a side wall of the cabinet door.

As one of the preferable modes of the invention, the middle part of the cable bin is also provided with a clapboard; the cable bin is divided into an upper accommodating bin and a lower accommodating bin by the partition board, and the input line and the output line are respectively accommodated in the upper accommodating bin and the lower accommodating bin.

Compared with the prior art, the invention has the advantages that: the voltage measuring device is simple in structure and reasonable in spatial layout, the voltage sensors are fixedly arranged on the outer side wall of the bin door, a cabinet body is not required to be additionally arranged, the application cost is saved, the high-voltage end of each voltage sensor is respectively electrically connected with the input line, an external electric energy meter is directly connected with the voltage sensors when the voltage is measured, a plug-in connector is not required to be arranged inside the cabinet body, and the measuring operation is facilitated; meanwhile, the safety mechanism is arranged between the voltage sensor and the input line, when the internal short circuit and other extreme conditions occur, the voltage sensor and the input line are disconnected through the safety mechanism, the normal operation of a line is not influenced, and the safety and the reliability of the device in the operation process in a high-voltage environment can be effectively guaranteed.

Drawings

Fig. 1 is an overall structural schematic diagram of a ring main unit based on high voltage measurement in an embodiment 1 when a cabinet door and a cabin door are closed;

Fig. 2 is a schematic view of an overall structure of the ring main unit in an open state of a cabinet door and a compartment door based on high voltage measurement in embodiment 1;

FIG. 3 is a schematic view showing the structure of input lines, output lines and electric elements in embodiment 1;

FIG. 4 is an enlarged view at A of FIG. 1;

FIG. 5 is a sectional view of the safety mechanism and the input line in embodiment 1;

FIG. 6 is a sectional view of the voltage sensor, the high-voltage fuse and the input line in embodiment 1;

FIG. 7 is an enlarged view at B of FIG. 6;

FIG. 8 is an enlarged view at C of FIG. 6;

FIG. 9 is a schematic view of the structure of an input line, an output line, a cable compartment and a partition in example 1;

FIG. 10 is a schematic structural view of a wire clamp and a clamping groove in example 1;

Fig. 11 is a schematic view of the structure of the voltage sensor, the high-voltage fuse, and the input line in embodiment 1.

In the figure: 1 is the cabinet body, 2 is the cavity, 3 is the cable compartment, 4 is the cabinet door, 5 is the door in the storehouse, 6 is the mounting panel, 7 is the input line, 701 is the department of skinning, 8 is the output line, 9 is safety mechanism, 901 is the bottom plate, 902 is the insulating block, 903 is high-voltage fuse, 904 is the conductor, 905 is the clamp splice, 10 is voltage sensor, 11 is signal output joint, 12 is electrical component, 13 is the observation window, 14 is the heat dissipation barrier, 15 is the fastener, 16 is the draw-in groove, 17 is the baffle.

Detailed Description

The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.