CN-224222691-U - Protection device and system of slab continuous casting machine

Abstract

The utility model discloses a slab continuous casting machine protection device and system relates to the steel making field, consider when slab continuous casting machine work for a long time, the braking clearance of the braking part of electromagnetic brake can change thereupon, and the change of braking clearance still can lead to the operating voltage increase of electromagnetic brake, therefore this scheme not only measures the braking clearance of the braking part of corresponding battery valve through braking clearance measuring device, still can measure the voltage value of the electromagnetic brake place return circuit that corresponds through voltage acquisition device, verify the fault condition of electromagnetic brake simultaneously from two aspects, make the controller can more accurate find out the electromagnetic brake that has the trouble, and control the disconnection of the power supply return circuit of trouble electromagnetic brake place, in order to prevent that partial trouble electromagnetic brake from leading to burning out the motor rather than being connected because of the change of self braking clearance.

Inventors

• CHEN JIANLIANG
• YE SHU

Assignees

• 攀钢集团攀枝花钢钒有限公司

Dates

Publication Date

20260512

Application Date

20250530

Claims (10)

1. 1. The slab continuous casting machine protecting device is characterized by comprising a plurality of rectifiers, electromagnetic gates, first switches, voltage acquisition devices and brake clearance measuring devices, wherein the number of the electromagnetic gates is the same as that of the rectifiers, the first switches are the same as that of the rectifiers, the voltage acquisition devices are the same as that of the rectifiers, and the brake clearance measuring devices are the same as that of the rectifiers; the input end of each rectifier is connected with the motor, and the output end of each rectifier is connected with the first end of the corresponding first switch; The voltage acquisition end of each voltage acquisition device is connected with the second end of the corresponding first switch, and the output end of each voltage acquisition device is connected with the controller and is used for acquiring the voltage value of the loop where the corresponding electromagnetic gate is located; Each braking gap measuring device is arranged in a preset distance range of the corresponding braking component of the electromagnetic brake and is used for measuring the braking gap of the corresponding braking component of the battery valve; The second end of each first switch is connected with a corresponding electromagnetic brake, and the control end is connected with the controller and used for being disconnected based on the control of the controller when the voltage value corresponding to the loop where each electromagnetic brake is located is greater than a preset voltage threshold value and/or the braking clearance of the braking part of each electromagnetic brake is greater than a preset braking clearance threshold value.
2. 2. The slab casting machine protecting apparatus according to claim 1, further comprising: And each temperature acquisition device is connected with the corresponding electromagnetic gate and is used for acquiring the temperature value of the corresponding electromagnetic gate so that the corresponding first switch is disconnected based on the control of the controller when the temperature value of the corresponding electromagnetic gate is greater than a preset temperature threshold.
3. 3. The slab casting machine protecting apparatus according to claim 1, further comprising: And each magnetic resistance detection device is connected with the corresponding coil of the electromagnetic gate and is used for collecting the magnetic resistance value of the corresponding coil of the electromagnetic gate, so that the corresponding first switch is disconnected based on the control of the controller when the corresponding magnetic resistance value of the corresponding coil of the electromagnetic gate is larger than a preset magnetic resistance threshold value.
4. 4. The slab casting machine protecting apparatus according to claim 1, further comprising: And the current collection end of each current collection device is connected with the second end of the corresponding first switch, and the output end of each current collection device is connected with the controller and is used for collecting the current value of the loop where the corresponding electromagnetic gate is positioned, so that the corresponding first switch is disconnected based on the control of the controller when the current value of the loop where the corresponding electromagnetic gate is positioned is greater than a preset temperature threshold.
5. 5. The slab casting machine protecting apparatus according to claim 1, further comprising: And the first end of the main switch is connected with the motor, and the second end of the main switch is respectively connected with the input end of each rectifier.
6. 6. The slab casting machine protecting apparatus according to claim 1, further comprising: The first end of the protection device is connected with the motor, and the second end of the protection device is connected with the input end of each rectifier respectively and is used for being disconnected when overvoltage and/or overcurrent conditions occur in a corresponding loop where the motor is located.
7. 7. The slab casting machine protecting device according to any one of claims 1 to 6, wherein the brake clearance measuring means is a feeler gauge provided within a preset distance range of the brake member of the corresponding electromagnetic brake for measuring the brake clearance of the brake member of the corresponding battery valve.
8. 8. The slab casting machine protecting apparatus according to any one of claims 1 to 6, wherein the brake clearance measuring device comprises a laser measuring instrument and a processor vertically arranged within a preset distance range of the brake member of the corresponding electromagnetic brake; The laser measuring instrument is used for emitting measuring laser to the braking gap of the braking part of the corresponding electromagnetic brake and receiving the reflected measuring laser.
9. 9. The protection device of slab casting machine according to claim 8, wherein the brake clearance measuring device further comprises an infrared detection device arranged in a preset distance range of the laser measuring instrument and an ultrasonic sensor arranged in the preset distance range of the laser measuring instrument; The infrared detection device is used for transmitting infrared light with preset wavelength to the laser measuring instrument and receiving the reflected infrared light; The ultrasonic sensor is used for transmitting first ultrasonic waves and second ultrasonic waves to the laser measuring instrument and the electromagnetic brake respectively and receiving the reflected first ultrasonic waves and the reflected second ultrasonic waves.
10. 10. A slab continuous casting machine protection system is characterized by comprising a motor, a controller and a slab continuous casting machine protection device according to any one of claims 1 to 9, wherein the slab continuous casting machine protection device is respectively connected with the motor and the controller.

Description

Protection device and system of slab continuous casting machine Technical Field The utility model relates to the field of steel making, in particular to a protection device and system of a slab continuous casting machine. Background Along with the development of technology, the steel making technology is more advanced, the current advanced steel making technology comprises a continuous cast steel iron making technology, a continuous cast steel iron making technology needs to be used for a slab continuous casting machine, and the continuous casting machine is used for continuously casting molten steel into a slab, so that the process replaces a die casting process in the traditional steel making technology, the efficiency and the product quality are greatly improved, the stable operation of the process directly relates to the connection efficiency of the whole steel making-steel rolling process, and the process is a key technical support for reducing the cost and improving the market competitiveness of steel enterprises. The existing slab caster is composed of a rectifier and an electromagnetic brake, as shown in fig. 1, the rectifier is respectively connected with a motor and the electromagnetic brake, the rectifier is used for converting alternating current electric energy output by the motor into direct current electric energy required by the operation of the electromagnetic brake, when the slab caster works for a long time, the braking gap of a braking part of the electromagnetic brake can be changed, so that the working voltage of the electromagnetic brake is increased, further, an electromagnetic brake coil or the motor connected with the slab caster is burnt out, and the safety of a die casting process is greatly reduced. Disclosure of utility model The utility model aims to provide a slab continuous casting machine protection device and system, which not only measure the braking clearance of a braking part corresponding to a battery valve, but also measure the voltage value of a loop where a corresponding electromagnetic brake is positioned, and verify the fault condition of the electromagnetic brake from two aspects at the same time, so that a controller can more accurately find out the fault electromagnetic brake, and control the disconnection of a power supply loop where the fault electromagnetic brake is positioned, so as to prevent a part of fault electromagnetic brake from burning out a motor connected with the fault electromagnetic brake due to the change of the braking clearance of the fault electromagnetic brake. In order to solve the technical problems, the utility model provides a slab caster protection device, which comprises a plurality of rectifiers, electromagnetic gates, first switches, voltage acquisition devices and brake clearance measurement devices, wherein the number of the electromagnetic gates is the same as that of the rectifiers, the first switches are the same as that of the rectifiers, the voltage acquisition devices are the same as that of the rectifiers, and the brake clearance measurement devices are the same as that of the rectifiers; the input end of each rectifier is connected with the motor, and the output end of each rectifier is connected with the first end of the corresponding first switch; The voltage acquisition end of each voltage acquisition device is connected with the second end of the corresponding first switch, and the output end of each voltage acquisition device is connected with the controller and is used for acquiring the voltage value of the loop where the corresponding electromagnetic gate is located; Each braking gap measuring device is arranged in a preset distance range of the corresponding braking component of the electromagnetic brake and is used for measuring the braking gap of the corresponding braking component of the battery valve; The second end of each first switch is connected with a corresponding electromagnetic brake, and the control end is connected with the controller and used for being disconnected based on the control of the controller when the voltage value corresponding to the loop where each electromagnetic brake is located is greater than a preset voltage threshold value and/or the braking clearance of the braking part of each electromagnetic brake is greater than a preset braking clearance threshold value. Optionally, the method further comprises: And each temperature acquisition device is connected with the corresponding electromagnetic gate and is used for acquiring the temperature value of the corresponding electromagnetic gate so that the corresponding first switch is disconnected based on the control of the controller when the temperature value of the corresponding electromagnetic gate is greater than a preset temperature threshold. Optionally, the method further comprises: And each magnetic resistance detection device is connected with the corresponding coil of the electromagnetic gate and is used for collecting the magn