CN218005604U - A mine high voltage switchgear - Google Patents

Abstract

The utility model belongs to the technical field of switch cabinet devices, in particular to a mining high-voltage switch cabinet, which comprises a cabinet body, wherein a main transformer wire inlet chamber, a voltage transformer connecting chamber and a high-voltage cable chamber are arranged in the cabinet body from top to bottom; the high-voltage cable chamber is internally provided with an annular assembly and a connecting transverse member for fixing the annular assembly at the bottom of the cabinet body; the annular subassembly include the annular bottom plate, connect in the annular apron of annular bottom plate upper end, the annular bottom plate forms with the annular apron and holds the chamber, it is provided with annular transformer to hold the chamber, the utility model provides a high-voltage cabinet receives the environmental dust influence in the mine construction at complex environment among the prior art, zero sequence current transformer produces and adheres to the dust, and the three-phase electricity of cable lacks the looks and detects and receives the influence, and later stage is to the great problem of zero sequence current transformer's maintenance replacement cost.

Description

A mine high voltage switchgear

technical field

The utility model belongs to the technical field of switch cabinet devices, in particular to a high-voltage switch cabinet for mining.

Background technique

High-voltage switchgear refers to the role of on-off, control or protection in power system power generation, transmission, distribution, power conversion and consumption. High-voltage switchgear is used as electrical products with a voltage level of 3.6kV ~ 550kV, high-voltage isolating switch and grounding switch, high-voltage load switch, high-voltage automatic reclosing and sectionalizer, high-voltage operating mechanism, high-voltage explosion-proof power distribution device and high-voltage switchgear. category.

The zero-sequence current transformer is installed on the three-phase line of the high-voltage switchgear. When an electric shock or leakage fault occurs in the power transmission and distribution circuit system, the three-phase load of the line is unbalanced, and the secondary sides of each zero-sequence current transformer are respectively Output the zero-sequence current to the corresponding measurement or protection device, so that the components on the secondary line send signals such as cutting off the circuit and alarm, and the operator operates in time to ensure the safety of the person and equipment. The Chinese patent application number CN201910588550.2 is disclosed A high-voltage switchgear power supply protection system, including an incoming line voltage transformer, an incoming line current transformer, and a first circuit breaker module, and the incoming line voltage transformer, incoming line current transformer, and the first circuit breaker module are connected in sequence, and the first The circuit breaker module is connected to the metering cabinet through the high-voltage busbar. The outlet cabinet includes the second circuit breaker module, the outgoing current transformer and the second zero-sequence current transformer. The second circuit breaker module, the outgoing current transformer and the second zero-sequence current transformer The second circuit breaker module is connected to the metering cabinet through the high-voltage busbar, the second zero-sequence current transformer, transformer and UPS are connected in sequence, and the input terminal of the manual converter can be connected to the secondary voltage transformer of the incoming line. side or the output side of the UPS, the output end of the manual converter is connected to the relay protector, the first circuit breaker module and the second circuit breaker module are controlled by the relay protector, and the power supply can be restored without its own generator. It is easy and fast to operate.

However, with the applicant's further research, it was found that because the high-voltage cabinet in this application was affected by environmental dust in a complex environment, such as mine construction, the zero-sequence current transformer produced adhering dust, and the three-phase electric phase loss detection of the cable was affected. The cost of maintenance and replacement of zero-sequence current transformers in the later period is relatively high.

Utility model content

In order to solve the above technical problems, the utility model adopts the following technical solutions:

A mine-used high-voltage switchgear, including a cabinet body, the cabinet body has a main transformer inlet room, a voltage transformer connection room, and a high-voltage cable room from top to bottom;

The high-voltage cable chamber is provided with a ring assembly and a connecting cross piece for fixing the ring assembly at the bottom of the cabinet;

The annular component includes an annular bottom plate, an annular cover plate connected to the upper end of the annular bottom plate, the annular bottom plate and the annular cover plate form a cavity, and the cavity is provided with an annular transformer.

Further, the annular bottom plate and the annular cover plate are provided with connecting side ears near the connecting horizontal piece, and the two connecting side ears cooperate with each other and are connected with the connecting horizontal piece.

Further, the toroidal transformer is a zero-sequence current transformer.

Further, several fasteners are connected to the outer side of the annular component for matching the annular bottom plate and the annular cover plate, and the fasteners can be connected by screws or buckles to make the two detachable.

Further, the cabinet body is provided with a cabinet door connected by a hinge, and a sealing strip is provided at the closing position between the cabinet door and the cabinet body, and the sealing strip is arranged on the cabinet body. The switchgear has high requirements on the airtightness of the inside and outside, and a sealing strip is used at the connection between the door and the cabinet body to achieve better airtightness.

Further, the cabinet door is provided with a switch, a main transformer protection plate and a switch status indicator. The various openings, main transformer protection pressure plates and switch status indicators on the cabinet door give the operator an intuitive perspective, and the electrical parameters of each electrical equipment in the switch cabinet are displayed in a concentrated manner.

Further, a lightning arrester is also provided in the high-voltage cable chamber.

Compared with the prior art, the utility model has the following beneficial effects:

The transformer is placed in the cavity formed by the cooperation of the annular bottom plate and the annular cover plate. In the harsh environment of the mine, dust and foreign matter do not directly adhere to the surface of the transformer, forming a protective layer for the transformer. In the subsequent maintenance of the switch cabinet , only need to change the annular bottom plate and the annular cover plate, making the maintenance cost lower.

Description of drawings

Fig. 1 is the structural representation of a kind of mining high-voltage switchgear embodiment of the utility model;

Fig. 2 is a schematic structural view of the bottom of the cabinet in a mine high-voltage switch cabinet embodiment of the present invention;

Fig. 3 is a schematic diagram of the main structure of a mine high-voltage switchgear embodiment of the present invention;

Fig. 4 is a three-dimensional structural schematic diagram of a ring assembly and a connecting cross member in a mine high-voltage switchgear embodiment of the present invention;

The reference signs in the drawings of the description include:

Cabinet body 1, main transformer inlet room 10, voltage transformer connection room 11, high voltage cable room 12, cabinet door 13, hinge 130, switch 131, main transformer protection pressure plate 132, switch status indicator 133, ring assembly 2 , Ring bottom plate 21, ring cover plate 22, connecting side ear 23, fastening piece 24, connecting horizontal piece 25, nameplate 3.

detailed description

In order to enable those skilled in the art to better understand the utility model, the technical solution of the utility model will be further described below in conjunction with the drawings and embodiments.

Wherein, the accompanying drawings are only for illustrative purposes, and what are shown are only schematic diagrams, rather than physical drawings, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the present utility model, some parts of the accompanying drawings will be omitted , enlargement or reduction, does not represent the size of the actual product; for those skilled in the art, it is understandable that some known structures and their descriptions in the drawings may be omitted, and the same or similar structures in the drawings of the embodiments of the utility model Labels correspond to the same or similar parts; in the description of the utility model, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer" and other indications appear The orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation or be constructed in a specific orientation. and operation, so the terms describing the positional relationship in the drawings are only for illustrative purposes, and should not be construed as limitations on this patent. Those of ordinary skill in the art can understand the specific meanings of the above terms according to specific situations.

Example:

As shown in Fig. 1-Fig. 4, a mining high-voltage switchgear of the present utility model includes a cabinet body 1, and the cabinet body 1 has a main transformer inlet room 10, a voltage transformer connection room 11 and a high-voltage switchgear from top to bottom. The cable room 12 is also equipped with a 10 kV lightning arrester in the high-voltage cable room 12, wherein a vacuum circuit breaker is placed in the voltage transformer connection room 11, and the cable outlet terminal is connected to the high-voltage bushing of the main transformer inlet room 10 Above, the high-voltage cable chamber 12 is provided with a ring assembly 2 and a connecting cross piece 25 for fixing the ring assembly 2 at the bottom of the cabinet body 1. The ring assembly 2 includes an annular bottom plate 21 and an annular cover plate connected to the upper end of the annular bottom plate 21. 22. The annular bottom plate 21 and the annular cover plate 22 form a cavity, and the cavity is provided with a ring transformer. The ring transformer is a zero-sequence current transformer. When the zero-sequence current transformer detects a zero-sequence current, the switch is tripped. Protect electrical equipment from damage.

The transformer is placed in the cavity formed by the cooperation of the annular bottom plate 21 and the annular cover plate 22. In the harsh environment of the mine, dust and foreign matter do not directly adhere to the surface of the transformer, forming a protective layer for the transformer. During the maintenance of the cabinet, only the annular bottom plate 21 and the annular cover plate 22 are needed, so that the maintenance cost is lower.

The annular bottom plate 21 and the annular cover plate 22 are provided with connecting side ears 23 near the side of the connecting cross piece 25, and the two connecting side ears 23 cooperate with each other and are connected with the connecting cross piece 25. side connection, the ring assembly is placed at the center of the bottom of the cabinet body 1, and the high-voltage cable passes through the ring assembly 2.

The outer side of the annular component 2 is connected with several fastening pieces 24 for matching the annular bottom plate 21 and the annular cover plate 22. The fastening pieces 24 can be connected by screws or buckles to make the two detachable. The inner sides of the annular cover plate 22 both have concave surfaces, and after the two are combined, the two concave surfaces form a cavity.

The cabinet body 1 is provided with a cabinet door 13 connected by a hinge 130 , and there is a sealing rubber strip at the closing position between the cabinet door 13 and the cabinet body 1 , and the sealing rubber strip is arranged on the cabinet body 1 . The switchgear has high requirements on the airtightness of the inside and outside. Sealant strips are used at the connection between the door 13 and the cabinet body 1 to achieve better airtightness. The door 13 is equipped with a switch 131 and a main transformer protection pressure plate 132. And switch status indicator 133. The various switches on the cabinet door 13, the main transformer protection pressure plate 132 and the switch status indicator 133 provide the operator with an intuitive perspective, showing the electrical parameters of each electrical equipment in the switch cabinet. Set nameplate 3 on 1.

The above is only an embodiment of the utility model, and the common knowledge such as the specific structure and characteristics known in the scheme is not described too much here. Those of ordinary skill in the art know all the common knowledge in the technical field of the utility model before the filing date or the priority date. Technical knowledge, being able to know all the existing technologies in this field, and having the ability to apply conventional experimental methods before this date, those of ordinary skill in the art can improve and implement this plan based on their own abilities under the inspiration given by this application, Some typical known structures or known methods should not be obstacles for those of ordinary skill in the art to implement the present application. It should be pointed out that for those skilled in the art, under the premise of not departing from the structure of the utility model, some deformations and improvements can also be made, and these should also be regarded as the protection scope of the utility model, and these will not affect the utility model. Effects of novel implementations and utility of patents.

Claims (7)

1. A mining high tension switchgear characterized in that includes:

the intelligent cabinet comprises a cabinet body, wherein a main transformer incoming line chamber, a voltage transformer connecting chamber and a high-voltage cable chamber are arranged in the cabinet body from top to bottom;

the high-voltage cable chamber is internally provided with an annular assembly and a connecting transverse member for fixing the annular assembly at the bottom of the cabinet body;

the annular assembly comprises an annular bottom plate and an annular cover plate connected to the upper end of the annular bottom plate, the annular bottom plate and the annular cover plate form a cavity, and the cavity is provided with an annular transformer.

2. The mining high-voltage switch cabinet according to claim 1, characterized in that: the annular bottom plate and the annular cover plate are close to one side of the connecting transverse piece, and connecting side lugs are arranged on one side of the annular bottom plate and one side of the annular cover plate, are matched with each other and are connected with the connecting transverse piece.

3. The mining high-voltage switch cabinet according to claim 2, characterized in that: the annular mutual inductor is a zero sequence current mutual inductor.

4. A mining high-voltage switchgear, according to claim 3, characterized in that: and the outer side of the annular assembly is connected with a plurality of fastening connecting pieces used for matching the annular bottom plate with the annular cover plate.

5. The mining high-voltage switch cabinet according to claim 4, characterized in that: the cabinet body is provided with a cabinet door connected through a hinge, a sealing rubber strip is arranged at the closed position of the cabinet door and the cabinet body, and the sealing rubber strip is arranged on the cabinet body.

6. The mining high-voltage switch cabinet according to claim 5, characterized in that: the cabinet door is provided with a switch, a main transformer protection pressing plate and an on-off state indicator.

7. The mining high-voltage switch cabinet according to claim 6, characterized in that: and a lightning arrester is also arranged in the high-voltage cable chamber.

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