RU2800770C1 - Control cabinet - Google Patents

Abstract

FIELD: electrical engineering and load-bearing structural devices.

SUBSTANCE: invention relates to the construction of electric motor control cabinets and can be used to excite electrical machines. In the control cabinet with one-sided maintenance, the control and signalling part of the equipment is installed on the cabinet door and the swing frame. Lightweight swing frame is made of sheet steel in the form of a frame and reinforced along the contour with metal thin-walled profiles, installed on the cabinet door and has a rigid fixation in a position parallel to the door with the ability to rotate at an angle of more than 90° relative to the door, while the power part of the equipment is located inside the cabinet.

EFFECT: facilitating the installation of equipment, its maintenance during operation, providing prompt access for repairing equipment located inside the cabinet and on its door, rational use of the internal space of the cabinet.

1 cl, 4 dwg

Description

The invention relates to electrical engineering and load-bearing structural devices, in particular to the construction of electric motor control cabinets, and can be used to excite electrical machines.

Known thyristor exciters VTE, etc., made according to a unified scheme (http://www.roselco.ru/catalog/avtomatizirovannye_elektroprivody/vozbuditeli_tiristornye_dlya_sinkhronnykh_dvigateley_serii_vte/), (https://involt.ru/tiristomyi-vozbuditel/), which provide automatic control excitation current in various operating modes of a synchronous motor. The disadvantage of analogues is the location of a significant number of electronic components and thyristors inside the rack space, which reduces the maintainability of the installed equipment and the availability of its maintenance.

A cabinet for a motor control station is known (RU 2239267 23.10.2002 H02V 1/56, H05K 7/20), which is a housing in the form of a vertically oriented rectangular parallelepiped, made with the possibility of placing controls, indications and elements of power equipment. The cabinet for the electric motor control station structurally consists of the following main units: a metal case, which is a supporting structure, made in the form of a vertically oriented rectangular parallelepiped, divided into two compartments, mounted on a base containing a compartment for placing a power choke, closed in front and behind with perforated covers ; the main door of the power compartment, which provides access to the power equipment of the station; a small door that opens access to the station's control compartment; cable entry section, the body of which is made in the form of a rectangular parallelepiped, mounted on the upper part of the rear wall of the station cabinet body and having a door. The disadvantage of the technical solution is the presence of a large number of doors located on opposite sides of the cabinet.

Known control station for electric centrifugal pumps (RU 128945 01/10/2013 H02V 1/00, H05K 5/00), which is a body in the form of a vertically oriented rectangular parallelepiped, located on the base, made with the possibility of two-way service divided into three compartments: a control compartment and two of the power section - right and left, and additionally contains air ducts, a two-section rear panel duct and a single-section rear panel duct. The front panel is made in the form of two vertically located doors, the right one, which opens access to the right compartment of the power unit and the left one, which opens access to the left compartment of the power unit. The right and left doors of the front panel have seals, locks and door closing stops, while the left door is equipped with a series of fans on the inside. The right compartment of the power section has a frequency converter and a series of heaters. The left compartment of the power section is divided into three sections: upper middle and lower, while in the upper section there is a block of automatic switches and a knife switch with fuses, and in the lower section there is a sine filter. A small door that provides access to the control compartment is located at the top on the outside of the left front panel door and additionally contains three windows for viewing the run and stop voltage indicators. The left door in its upper part, behind the small door, contains a control compartment, equipped with controls and indications: a touch panel, a setting and control panel, three voltage, operation and stop indicators, an automatic switch, a socket and a protective visor. The control compartment is made in the form of a stepped parallelepiped protruding from the inner side of the upper part of the left door. A two-section box of the rear panel is located in its upper part and is made with a double-leaf door, behind which there is an input panel in the left section, and an output panel in the right section. A single-section box of the rear panel is located in its lower part and is made with a door and contains a telemetry attachment unit. The disadvantage of the technical solution is the increased overall dimensions of the station and the double-sided arrangement of doors, which makes it difficult to quickly access the equipment and involves the periodic movement of the employee from the front side to the back, when carrying out repair and maintenance work.

Known technical solution adopted for the prototype, the exciter thyristor digital synchronous motor (RU176853 05/29/2014 H05N 7/20) made in the form factor of a vertical cabinet with two-way service, containing controls and indications. Power semiconductor modules mounted on a finned heatsink, the ribs of which are brought out into the hole on the rear wall of the cabinet. The internal space of the cabinet is divided into two compartments isolated from each other by an impenetrable insulating partition, additionally protected by a sheet heat-reflecting screen made of aluminum alloy, located parallel to the front door panel, while the control system unit, the measurement system unit and the indication unit are located in the front compartment, and the launcher unit resistance and power unit - in the rear compartment. The disadvantage of the prototype is the lack of optimization solutions for quick access for maintenance during operation and repair to the equipment located inside the cabinet.

In the proposed technical solution, in order to preserve the external dimensions and the possibility of rational use of the internal space of the one-way service cabinet, a lightweight swing frame is used, which is installed on the cabinet door, while the power part of the equipment is installed inside the cabinet, and the control and signal part on the cabinet door and lightweight swing frame , and the frame has a rigid fixation in a position parallel to the door with the ability to rotate at an angle of more than 90 ° relative to the door, thus, when the frame is rotated, access to the equipment on the door is freed (operator panel, switches, etc.). The location of the swing frame on the cabinet door does not require freeing up space in the cabinet when the door is open. This provides quick and direct access for maintenance and repair of equipment in the cabinet.

The technical result of the claimed invention is to facilitate the installation of equipment, its maintenance during operation, providing quick access for repairing equipment located inside the cabinet and on its door, rational use of the interior space of the cabinet.

The technical result is achieved by the fact that the control cabinet is made with one-sided maintenance with a lightweight swing frame and contains power semiconductor modules, control and signal elements. The control and signaling part of the equipment is installed on the cabinet door and the swivel frame, and the lightweight swivel frame is installed on the cabinet door and has a rigid fixation in a position parallel to the door and the ability to rotate at an angle of more than 90 ° relative to the door, while the power part of the equipment is located inside the cabinet. The swivel frame, in turn, is made of sheet steel, in the form of a frame and reinforced along the contour with metal thin-walled profiles.

In FIG. 1 shows the front view of the control cabinet.

In FIG. 2 shows the external view of the control cabinet.

In FIG. 3 shows a lightweight pivoting frame fixed in a position parallel to the door.

In FIG. 4 shows the lightweight swing frame in a serviceable position and rotated at a free angle towards the door.

The above design features are designed to ensure the rational use of the internal space of the cabinet, improve the installation of equipment, facilitate access for maintenance and repair of equipment located inside the cabinet.

Claims (1)

A control cabinet made with one-way maintenance, containing power semiconductor modules, control and signal equipment, characterized in that the control and signal part of the equipment is installed on the cabinet door and the swing frame, the lightweight swing frame is made of sheet steel in the form of a frame and reinforced along the contour with metal thin-walled profiles, installed on the cabinet door and has a rigid fixation in a position parallel to the door with the ability to rotate at an angle of more than 90° relative to the door, while the power part of the equipment is located inside the cabinet.