CN218332362U

CN218332362U - Electrical control system for oil-water cooler of submerged arc furnace transformer

Info

Publication number: CN218332362U
Application number: CN202220947921.9U
Authority: CN
Inventors: 吴联权; 吕志财; 陈振民; 孙志文; 翁域域; 孙晓晖
Original assignee: Yangjiang Yichuan Metal Technology Co ltd
Current assignee: Yangjiang Yichuan Metal Technology Co ltd
Priority date: 2022-04-22
Filing date: 2022-04-22
Publication date: 2023-01-17
Anticipated expiration: 2032-04-22

Abstract

The utility model discloses an electric control system of an oil-water cooler of a transformer of a submerged arc furnace, which comprises a manual control and an automatic control, wherein the manual control is composed of a main circuit, the automatic control is controlled by a control circuit and a signal input and output of a PLC control cabinet, the main circuit mainly comprises a switch, a thermal relay and a motor, and the control circuit mainly controls the start and stop of the oil-water cooler of the transformer of the submerged arc furnace; the control system has the advantages of high control reliability, strong anti-interference capability, visual and simple operation, low manufacturing cost, low maintenance cost and capability of ensuring the safe and stable operation of the equipment power grid. The failure rate is reduced, and the production is improved.

Description

Electrical control system for oil-water cooler of submerged arc furnace transformer

Technical Field

The utility model belongs to the technical field of smelt production, concretely relates to hot stove transformer oil water cooler electrical control system in ore deposit.

Background

The oil-water cooler for transformer in ore smelting furnace is one heat exchange apparatus with high heat transferring efficiency, less resistance loss, stable and reliable operation and compact structure. It is a spiral body with two uniform spiral channels made up by rolling a coiled plate. The two channels are respectively loaded with liquid oil and water to perform heat exchange in a full countercurrent state. It is composed of two special transformer oil pumps, oil-water pressure gauge, oil flow signal gauge, oil-water thermometer and electric control system. Hot oil is pumped into the cooler connecting pipe from the upper part of the transformer by an oil pump, and the cooled oil flows back to the transformer from the lower part of the oil tank through the other connecting pipe. The electrical control system adopts a PLC, an upper computer, a sensor and an electrical auxiliary system to realize manual and automatic control.

The original electric control boxes are respectively arranged in an ABC three-phase transformer room, are scattered, have high inspection strength, cause frequent tripping of an oil-water cooler control system due to factors of large dust, large vibration, strong electromagnetic interference, bad environment and the like on an industrial field, and cause frequent jamming of a contactor due to dust and abnormal sound of magnetic attenuation of a coil. Because the oil-water cooler electrical control and the transformer high-voltage cabinet have interlocking control signals, the oil-water cooler fault can cause the transformer high-voltage cabinet to trip at a large current, can cause major safety problems of personal equipment and can also cause power grid fluctuation. Causing economic loss and other defects.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned problem that exists among the prior art, the utility model relates to a hot stove transformer oil water cooler electrical control system in ore deposit, this system change original on-the-spot three control box into the switch board, concentrate on a switch board, place the control room in the electric stove, improve operational environment to increase automatic control, the host computer opens to oil water cooler and stops, and carries out on-line monitoring to some fault signal, and manual operation automatic operation and manual switching oil pump operation No. two satisfy the production requirement.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a hot stove transformer oil water cooler electrical control system in ore deposit, including manual control and automatic control, manual control comprises the main circuit, and automatic control is by the signal input output control of control circuit and PLC switch board, and the main circuit mainly comprises switch, thermorelay, motor, and the start-up and the stop of hot stove transformer oil water cooler in ore deposit of control circuit main control.

Like above-mentioned hot stove transformer oil water cooler electrical control system in ore deposit, manual control: taking an M1-1 motor as an example, before starting, QF1 and QF1-2 manual switches related to M1-1 are closed, FR1 plays a circuit protection role for a thermal relay, a KM1 main contact switch is controlled by a KM1 coil of a control circuit, an analysis control circuit is simplified into QFN,1KAn and KMn, wherein n represents a corresponding motor, the circuit QFN is closed, at the moment, M1-1 is analyzed, n is taken as 1, QF1 is closed, a SB3 spring switch is pressed, the KM1 coil is powered on, a normally open contact switch connected to the left side of an operating lamp, namely the KM1 contact switch is closed to form self-locking, meanwhile, a KM1 main contact switch on the left side is closed, the motor is powered on, a cooler runs, if the KM1 main contact switch is pressed to stop working, the KMn coil in the control circuit is powered off, the KM1 coil on the left side main contact switch is powered off, the KM1 main contact switch on the KM1 main circuit is disconnected again, and the motor is powered off.

Like above-mentioned electric control system of hot stove transformer oil water cooler in ore deposit, automatic control carries out relay operation by PLC signal control cabinet, hits the start button, PLC output module operation, analysis motor M1-1, the signal input output of PLC control cabinet, 1KA7 relay coil is electrified during the start, corresponding 1KAn is 1KA7 normally open contact switch closure this moment, KMn coil is KM1 coil is electrified after closing, after the electrification, KMn normally open contact switch closure, KM1 main contact switch closure motor is electrified, the cooler operation, if want to stop, click the stop button, 1KA8 relay coil is electrified, corresponding 1KAn is 1KA8 normally closed contact switch disconnection, KMn coil is KM1 coil and loses the electricity, cause main circuit KM1 main contact switch to break again, the motor loses the electricity and stops the operation.

Like the electric control system of the oil-water cooler of the submerged arc furnace transformer, the KMn main contact switch in the main circuit and the KMn normally open contact switch in the control circuit are both related to the power failure and the power acquisition of the KMn coil, and the coil controls the switch to act.

Compared with the prior art, the utility model discloses possess following technological effect:

the utility model discloses control reliability height, interference killing feature are strong, the operation is directly perceived simple and convenient, the cost is with low costs, the maintenance cost is low, ensure equipment electric wire netting safe and stable operation. The failure rate is reduced, and the production is improved. .

Drawings

FIG. 1 is a schematic diagram of the manual control of the present invention;

FIG. 2 is a schematic diagram of the automatic control of the present invention;

fig. 3 is a schematic diagram of the signal input/output control of the PLC control cabinet of the present invention.

Detailed Description

The following embodiments will be described in detail with reference to the accompanying drawings, so that how to implement the technical means of the present invention to solve the technical problems and achieve the technical effects can be fully understood and implemented.

Example 1

Referring to fig. 1-3, the utility model provides a hot stove transformer oil water cooler electrical control system in ore deposit, including manual control and automatic control, manual control comprises the main circuit, and automatic control is by the signal input output control of control circuit and PLC switch board, and the main circuit mainly comprises switch, thermal relay, motor, and control circuit mainly controls the start-up and the stop of hot stove transformer oil water cooler in ore deposit.

Before starting, firstly, power switches QF, QF1, QF2, QF3, QF1 and QF1-2 are switched on, and the operation of an oil-water cooler of the phase-A transformer is explained for manual control: when the SB3 button is pressed, the coil of the contactor KM1 is electrified, meanwhile, the auxiliary contact is closed and self-locked, and the KM1 main contact is closed, and the No. 1 pump of the A-phase oil-water cooler is electrified and started. When the SB1 button is pressed, the coil of the contactor KM1 loses power, the main contact of KM1 is disconnected, and the oil pump stops working.

Automatic control: the host computer mouse clicks a start button, the PLC output module outputs, the coil of the 1KA7 intermediate relay is electrified, the auxiliary normally open contact of the 1KA7 intermediate relay is closed, the coil of the contactor KM1 is electrified, the auxiliary contact is closed and self-locked, and the KM1 main contact is closed and is started through electrifying the pump No. 1 of the A-phase oil-water cooler. The upper computer mouse clicks the stop button, the PLC output module outputs, the 1KA8 intermediate relay is powered on, meanwhile, the 1KA8 intermediate relay assists the normally closed contact to be disconnected, the coil of the contactor KM1 is powered off, the KM1 main contact is disconnected, and the oil pump stops working. And the contactor KM1 sends a stop operation signal to the PLC and uploads the stop operation signal to the upper computer through the closing and the opening of the auxiliary normally open contact. The oil pump is equipped with the protection of heat-carrying relay, through thermal relay FR1 protection motor, and the closure and the disconnection of thermal relay FR1 auxiliary contact are with fault signal transmission to PLC to host computer, and the oil flow signal, water pressure oil pressure signal also insert well accuse PLC to the host computer, monitor on line, and control personnel in sending out the warning when having a fault and reminding. And the maintenance personnel are helped to judge and diagnose the fault. The QF1-2 and QF1-3 switches are switched on and off to switch the operation of a second oil pump, so that the first oil pump is used and the second oil pump is standby. The same applies to the phase B and phase C transformer.

The utility model discloses change original on-spot three control box into the switch board, concentrate on a switch board, place the control room in the electric stove, improve operational environment to increase automatic control, the host computer opens to oil water cooler and stops, and carries out on-line monitoring to some fault signals, and manual operation automatic operation and manual switching oil pump operation No. one and two satisfy the production requirement.

The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. Therefore, the above-described embodiments of the present invention should be construed as merely illustrative and not limitative of the present invention, and the appended claims should not be interpreted as limiting the scope of the invention, but rather the description is interpreted to include within their scope any variation within the meaning and range of equivalency of the present invention.

Claims

1. The utility model provides a hot stove transformer oil water cooler electrical control system in ore deposit, includes manual control and automatic control, and manual control comprises main circuit (1), and automatic control is by the signal input output control of control circuit (2) and PLC switch board, its characterized in that: the main circuit (1) mainly comprises a switch, a thermal relay and a motor, and the control circuit (2) mainly controls the start and stop of an oil-water cooler of the transformer of the submerged arc furnace;

the manual control comprises a QFN manual switch, a KMn contactor, an FRn thermal relay, a QFN-i manual switch and a Mn-x motor, wherein n takes values of 1, 2 and 3, i takes values of 2 and 3, and x takes values of 1 and 2; the output end of the main circuit (1) is connected with the input end of the FRn thermal relay, and a QFN manual switch and a KMn contactor are sequentially connected between the output end of the main circuit (1) and the input end of the FRn thermal relay; the output end of the FRn thermal relay is connected with the input end of the Mn-x motor, and a QFN-i manual switch is connected between the output end of the FRn thermal relay and the input end of the Mn-x motor;

the automatic control device comprises a QFN manual switch, an SB1 spring switch, an SB3 spring switch, a KMn main contact, a KMn coil, an FRn thermal relay, a 1KAy normally open contact switch, a 1KAz relay coil, an HLn operating lamp, n values of 1, 2 and 3, y values of 7, 11 and 15, and z values of 8, 12 and 16, wherein the output end of the main circuit (1) is connected with the input end of the 1KAy normally open contact switch, and the QFN manual switch and the SB1 spring switch are sequentially arranged between the output end of the main circuit (1) and the input end of the 1KAy normally open contact switch; the output end of the 1KAy normally open contact switch is respectively connected with the input end of an SB3 spring switch, the input end of a 1KAz relay coil and the input end of a KMn main contact, the output end of the SB3 spring switch, the output end of the 1KAz relay coil and the output end of the KMn main contact are connected with the input end of a main circuit (1), the connection between the output end of the SB3 spring switch, the output end of the 1KAz relay coil and the output end of the KMn main contact and the input end of the main circuit (1) is divided into a first line and a second line, the first line is sequentially connected with an FRn thermal relay and a KMn coil, and the second line is connected with an HLn operating lamp;

the KMn contactor in the main circuit (1) comprises a KMn main contact and a KMn coil.