Molten steel car control system and molten steel car

Abstract

The utility model discloses a molten steel car control system and a molten steel car, and is applied to the technical field of communication control. The frequency converter is used for driving the motor to operate so as to drive the molten steel car to move through the motor under the control of the mobile control handle; the change-over switch is connected with the frequency converter and has a first state and a second state; the first control circuit is respectively connected with the change-over switch and the converter controller; the second control circuit is respectively connected with the change-over switch and the mobile control handle; a converter controller; the movable control handle is connected with the converter controller, so that when the change-over switch is in the first state, the frequency converter is controlled by the movable control handle through the first control circuit and the converter controller; and when the change-over switch is in the second state, the frequency converter is controlled by the mobile control handle through the second control circuit. According to the scheme, the reliability of movement control of the molten steel car is effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to communication control technical field, in particular to a kind of steel ladle car control system and a kind of steel ladle car. BACKGROUND

[0002] Steel ladle car is important equipment in steelmaking metallurgy etc., after converter steelmaking needs to be loaded into steel ladle, then is sent by steel ladle car.Currently, the control signal of steel ladle car is given by converter body PLC (Programmable Logic Controller, programmable logic controller), due to complex field environment, the equipment that converter body PLC needs to control is more, so that the control of steel ladle car is prone to problem.For example, due to the network instability or failure of converter body PLC itself, leading to control signal unable to send to steel ladle car, at this time steel ladle car cannot run, if converter is out of steel at this time, it can cause spill accident, not only will burn loss equipment, influence production, also possibly endanger personal safety.In addition, fault can also cause logistics time extension, extend smelting cycle, lead to production easy to interrupt, production reduction.

[0003] From the above, how to guarantee the reliability of the mobile control of steel ladle car is the technical problem that present technical personnel in the field urgently need to solve. CONTENT OF UTILITY MODEL

[0004] The utility model aims at providing a kind of steel ladle car control system and a kind of steel ladle car, to effectively guarantee the reliability of the mobile control of steel ladle car.

[0005] To solve the above technical problem, the utility model provides the following technical scheme:

[0006] Firstly, the utility model provides a kind of steel ladle car control system, comprising:

[0007] Motor;

[0008] Frequency converter for driving the motor to run, to be moved under the control of mobile control handle by the motor drives the steel ladle car to move;

[0009] Switching switch with first state and second state is connected with the frequency converter;

[0010] First control circuit is connected with the switching switch and converter controller respectively;

[0011] Second control circuit is connected with the switching switch and the mobile control handle respectively;

[0012] The converter controller;

[0013] The mobile control handle connected with the converter controller, so that when the switch-over switch is in the first state, the frequency converter accepts the control of the mobile control handle through the first control circuit and the converter controller; when the switch-over switch is in the second state, the frequency converter accepts the control of the mobile control handle through the second control circuit.

[0014] In an embodiment, the first control circuit comprises a first switch and a second switch;

[0015] The first end of the first switch is connected with the first end of the second switch, and the connecting end is as the first end of the first control circuit; when the switch-over switch is in the first state, the first end of the first control circuit is connected to the first wiring terminal of the frequency converter through the switch-over switch;

[0016] The second end of the first switch is connected with the second wiring terminal of the frequency converter, and the second end of the second switch is connected with the third wiring terminal of the frequency converter;

[0017] The first wiring terminal is the power wiring terminal of the frequency converter;

[0018] The second wiring terminal is the forward wiring terminal of the frequency converter, so that when the switch-over switch is in the first state, and the first switch is turned on under the control of the mobile control handle through the converter controller, the frequency converter drives the steel ladle to move forward through the motor;

[0019] The third wiring terminal is the backward wiring terminal of the frequency converter, so that when the switch-over switch is in the first state, and the second switch is turned on under the control of the mobile control handle through the converter controller, the frequency converter drives the steel ladle to move backward through the motor.

[0020] In an embodiment, the second control circuit comprises a third switch and a fourth switch;

[0021] The first end of the third switch is connected with the first end of the fourth switch, and the connecting end is as the first end of the second control circuit; when the switch-over switch is in the second state, the first end of the second control circuit is connected to the first wiring terminal of the frequency converter through the switch-over switch;

[0022] The second end of the third switch is connected with the second wiring terminal of the frequency converter, and the second end of the fourth switch is connected with the third wiring terminal of the frequency converter;

[0023] The first wiring terminal is the power wiring terminal of the frequency converter;

[0024] The second connection terminal is a forward connection terminal of the frequency converter, so that when the switching switch is in the second state and the third switch is turned on under the control of the movement control handle, the frequency converter drives the steel ladle to move forward through the motor;

[0025] The third connection terminal is a backward connection terminal of the frequency converter, so that when the switching switch is in the second state and the fourth switch is turned on under the control of the movement control handle, the frequency converter drives the steel ladle to move backward through the motor.

[0026] In an embodiment, the third switch and the fourth switch are interlocked switches, so that when the third switch is turned on, the fourth switch is locked in the off state, and when the fourth switch is turned on, the third switch is locked in the off state.

[0027] In an embodiment, the motor comprises a single motor unit or a plurality of motor units working in parallel.

[0028] In an embodiment, further comprising:

[0029] An alarm device for outputting alarm information when the switching switch is in the second state.

[0030] In an embodiment, further comprising:

[0031] An emergency brake switch connected to the frequency converter, and when the emergency brake switch is in a non-default state, the frequency converter stops supplying power to the motor.

[0032] In an embodiment, the movement control handle is a self-resetting movement control handle, so that when the movement control handle is in a non-default posture due to force, the frequency converter drives the steel ladle to move through the motor under the control of the movement control handle; when the movement control handle is not under force, the movement control handle automatically returns to a default posture, so that the frequency converter stops supplying power to the motor under the control of the movement control handle to keep the steel ladle stationary.

[0033] In an embodiment, the movement control handle is a spring-type self-resetting movement control handle, and the non-default postures of the movement control handle include a first posture corresponding to forward movement of the steel ladle and a second posture corresponding to backward movement of the steel ladle.

[0034] In a second aspect, the utility model provides a steel ladle, comprising: a motor, a frequency converter, a switching switch, a first control circuit and a second control circuit;

[0035] The frequency converter is connected with the motor, so that the motor drives the steel ladle to move under the control of the mobile control handle; the switch is connected with the frequency converter and has a first state and a second state;

[0036] The first control circuit is connected with the switch and the converter controller respectively; the second control circuit is connected with the switch and the mobile control handle respectively;

[0037] The mobile control handle is connected with the converter controller, so that when the switch is in the first state, the frequency converter accepts the control of the mobile control handle through the first control circuit and the converter controller; when the switch is in the second state, the frequency converter accepts the control of the mobile control handle through the second control circuit.

[0038] The technical scheme provided by the embodiment of the utility model can realize the control of the frequency converter of the steel ladle through two control circuits, and the reliability of the mobile control of the steel ladle is ensured. Specifically, the switch can be in the first state by default, the first control circuit is connected with the switch and the converter controller 60 respectively, at this time, when the mobile control handle 70 is operated, the frequency converter can be controlled through the first control circuit, the converter controller 60 and the switch in the first state, so that the frequency converter drives the steel ladle to move through the motor under the control of the mobile control handle 70. If the converter controller 60 and other devices are abnormal, the above control mode is invalid, the switch can be switched to the second state, since the second control circuit is connected with the switch and the mobile control handle 70, at this time, when the mobile control handle 70 is operated, the frequency converter can be controlled through the second control circuit and the switch in the second state, so that the frequency converter drives the steel ladle to move through the motor under the control of the mobile control handle 70. It can be seen that in the scheme, the mobile control handle 70 can realize the mobile control of the steel ladle through the first control circuit or the second control circuit, and the reliability of the mobile control of the steel ladle is effectively ensured. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0040] Figure 1 It is a structural schematic diagram of the steel ladle control system provided by a specific embodiment of the utility model;

[0041] Figure 2 The utility model provides a steel ladle control system's structural diagram for another specific implementation mode of the utility model. Specific implementation mode

[0042] The core of the utility model provides a steel ladle control system and a steel ladle, effectively guarantee the reliability of the mobile control of steel ladle.

[0043] In order to make the personnel of the prior art better understand the utility model scheme, the utility model is further detailed below in combination with the drawings and specific implementation mode. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the scope of the utility model protection.

[0044] Please refer to Figure 1 , Figure 1 The utility model provides a steel ladle control system's structural diagram for a specific implementation mode of the utility model, and the steel ladle control system can include:

[0045] Motor 10;

[0046] Frequency converter 20 for driving motor 10 to run, to drive steel ladle to move under the control of mobile control handle 70 by motor 10;

[0047] Switching switch 30 connected with frequency converter 20, with first state and second state;

[0048] First control circuit 40 connected with switching switch 30 and converter control 60 respectively;

[0049] Second control circuit 50 connected with switching switch 30 and mobile control handle 70 respectively;

[0050] Converter control 60;

[0051] Mobile control handle 70 connected with converter control 60, so that when switching switch 30 is first state, frequency converter 20 accepts the control of mobile control handle 70 through first control circuit 40 and converter control 60;When switching switch 30 is second state, frequency converter 20 accepts the control of mobile control handle 70 through second control circuit 50.

[0052] Specifically, the motor 10 is arranged in the tundish, and the frequency converter 20 can drive the motor 10 to operate under the control of the movement control handle 70, and then drive the tundish to move. In the scheme of the application, the movement control handle 70 can control the frequency converter 20 based on the first control circuit 40, or control the frequency converter 20 based on the second control circuit 50, thereby effectively ensuring the reliability of the movement control of the tundish.

[0053] When the movement control handle 70 controls the frequency converter 20 based on the first control circuit 40, the switching switch 30 needs to be in the first state. Since the first control circuit 40 is connected with the switching switch 30 and the converter controller 60 respectively, the operation of the movement control handle 70 can be detected by the converter controller 60, and the converter controller 60 can control the first control circuit 40 based on the operation of the movement control handle 70. At this time, the frequency converter 20 can control the motor 10 based on the state of the first control circuit 40.

[0054] When the movement control handle 70 controls the frequency converter 20 based on the second control circuit 50, the switching switch 30 needs to be in the second state. Since the second control circuit 50 is connected with the switching switch 30 and the movement control handle 70 respectively, the operation of the movement control handle 70 can directly control the state of the second control circuit 50. When the switching switch 30 is in the second state, the frequency converter 20 can control the motor 10 based on the state of the second control circuit 50.

[0055] In actual application, the default state of the switching switch 30 can be the first state. If the converter controller 60 and other devices are abnormal, so that the movement control handle 70 cannot control the frequency converter 20 based on the first control circuit 40, the switching switch 30 can be switched to the second state, so that the movement control handle 70 controls the frequency converter 20 based on the second control circuit 50.

[0056] The specific structure of the first control circuit 40 and the second control circuit 50 can be set and adjusted according to actual needs, as long as it can achieve the functional requirements of the application. For example, in one specific embodiment of the application, refer to Figure 2 The first control circuit 40 can include a first switch J1 and a second switch J2.

[0057] The first end of the first switch J1 is connected with the first end of the second switch J2, and the connection end is the first end of the first control circuit 40. When the switching switch 30 is in the first state, the first end of the first control circuit 40 is connected to the first terminal of the frequency converter 20 through the switching switch 30.

[0058] The second end of the first switch J1 is connected with the second wiring terminal of the frequency converter 20, and the second end of the second switch J2 is connected with the third wiring terminal of the frequency converter 20.

[0059] The first wiring terminal is the power wiring terminal of the frequency converter 20. The second wiring terminal is the forward wiring terminal of the frequency converter 20, so that when the switching switch 30 is in the first state, and the first switch J1 is turned on by the converter controller 60 under the control of the movement control handle 70, the frequency converter 20 drives the ladle car to move forward through the motor 10. The third wiring terminal is the backward wiring terminal of the frequency converter 20, so that when the switching switch 30 is in the first state, and the second switch J2 is turned on by the converter controller 60 under the control of the movement control handle 70, the frequency converter 20 drives the ladle car to move backward through the motor 10.

[0060] The embodiment considers that in actual application, the ladle car usually has a special running track, that is, generally, the ladle car does not need to run freely in the site, but moves forward / backward on the set track, so in the embodiment, when the movement control handle 70 controls the frequency converter 20 based on the first control circuit 40, the ladle car can be specifically controlled to move forward or backward, and at this time, the first switch J1 and the second switch J2 can realize the first control circuit 40 required by the application.

[0061] Please refer to Figure 2 The second end of the first switch J1 is connected with the second wiring terminal of the frequency converter 20, and the second wiring terminal of the frequency converter 20 is marked as 27 in Figure 2 , and the second wiring terminal is the forward wiring terminal of the frequency converter 20. The second end of the second switch J2 is connected with the third wiring terminal of the frequency converter 20, and the third wiring terminal of the frequency converter 20 is marked as 28 in Figure 2 , and the third wiring terminal is the backward wiring terminal of the frequency converter 20.

[0062] In the example of Figure 2 , the switching switch 30 is specifically a single-pole double-throw switch, of course, in other specific embodiments, the switching switch 30 can be set as other forms, as long as it can realize the functional requirements of the switching switch 30 in the application scheme.

[0063] For example, in a specific case, the operator needs to move the ladle forward, the operator can operate the moving control handle 70 at the control console, for example, the operator can press the moving control handle 70 to the left side, the moving control handle 70 is connected to the converter controller 60, which can be wired or wireless, as long as the operation of the moving control handle 70 by the operator can be accurately detected by the converter controller 60. In this example, after the operation of the moving control handle 70 by the operator is detected by the converter controller 60, the converter controller 60 can control the first control circuit 40, specifically, the converter controller 60 can control the first switch J1 to be turned on and the second switch J2 to be turned off.

[0064] When the switching switch 30 is in the first state, the first end of the first control circuit 40 is connected to the first terminal of the frequency converter 20 through the switching switch 30. The first terminal of the frequency converter 20 is a power terminal, that is, it can provide a high level, and Figure 2 In this example, the power terminal of the frequency converter 20 is marked as 24. As can be seen, in this example, when the first switch J1 is turned on and the second switch J2 is turned off, the frequency converter 20 can detect the terminal 27, that is, the second terminal is high. At this time, the frequency converter 20 can drive the motor 10 to move the ladle forward.

[0065] Similarly, if the operator needs to move the ladle backward, the operator can operate the moving control handle 70 at the control console, for example, the operator can press the moving control handle 70 to the right side, after the operation of the moving control handle 70 by the operator is detected by the converter controller 60, the converter controller 60 can control the first control circuit 40, specifically, the converter controller 60 can control the second switch J2 to be turned on and the first switch J1 to be turned off. At this time, since the switching switch 30 is in the first state, when the second switch J2 is turned on and the first switch J1 is turned off, the frequency converter 20 can detect the terminal 28, that is, the third terminal is high. At this time, the frequency converter 20 can drive the motor 10 to move the ladle backward.

[0066] In actual application, in order to reduce the probability of false triggering, the second switch J2 and the first switch J1 can be in off state by default, that is, if the control signal of the converter controller 60 is not received, the second switch J2 and the first switch J1 will be off. The converter controller 60 can be a PLC controller of the converter body, and can be wired or wirelessly connected with the first control circuit 40, as long as it can effectively control the first control circuit 40. Of course, in actual application, in order to ensure reliability, the converter controller 60 can be wired connected with the first control circuit 40 to control the corresponding switches in the first control circuit 40, so that the movement control requirements of the molten steel car of the worker are transmitted to the frequency converter 20. For example, in the above embodiment, the first switch J1 and the second switch J2 in the first control circuit 40 can be realized based on a relay, and the converter controller 60 controls the attraction state of the corresponding relay through a cable, thereby controlling the on-off of the first switch J1 and the second switch J2.

[0067] Similarly, the specific structure of the second control circuit 50 can also be set and adjusted according to actual needs, for example, in one specific embodiment of the utility model, please refer to Figure 2 , the second control circuit 50 includes a third switch J3 and a fourth switch J4;

[0068] The first end of the third switch J3 is connected with the first end of the fourth switch J4, and the connection end is as the first end of the second control circuit 50; when the switch 30 is in the second state, the first end of the second control circuit 50 is connected to the first wiring terminal of the frequency converter 20 through the switch 30;

[0069] The second end of the third switch J3 is connected with the second wiring terminal of the frequency converter 20, and the second end of the fourth switch J4 is connected with the third wiring terminal of the frequency converter 20;

[0070] Among them, the first wiring terminal is the power wiring terminal of the frequency converter 20. The second wiring terminal is the forward wiring terminal of the frequency converter 20, so that when the switch 30 is in the second state and the third switch J3 is turned on under the control of the movement control handle 70, the frequency converter 20 drives the molten steel car to move forward through the motor 10. The third wiring terminal is the backward wiring terminal of the frequency converter 20, so that when the switch 30 is in the second state and the fourth switch J4 is turned on under the control of the movement control handle 70, the frequency converter 20 drives the molten steel car to move backward through the motor 10.

[0071] The embodiment also takes into account that in actual application, the ladle car usually moves forward / backward on a special running track, and thus in the embodiment, the movement control handle 70 controls the frequency converter 20 based on the second control circuit 50, and specifically controls the forward movement of the ladle car or the backward movement of the ladle car, and at this time, the second control circuit 50 required by the application can be realized through the third switch J3 and the fourth switch J4.

[0072] For details, refer to Figure 2 The second end of the third switch J3 is connected with the second wiring terminal of the frequency converter 20, and the second wiring terminal of the frequency converter 20 is marked as 27 in Figure 2 , and is the forward wiring terminal of the frequency converter 20. The second end of the fourth switch J4 is connected with the third wiring terminal of the frequency converter 20, and the third wiring terminal of the frequency converter 20 is marked as 28 in Figure 2 , and is the backward wiring terminal of the frequency converter 20.

[0073] For example, in a specific case, the PLC controller of the converter body fails, so that the staff cannot control the movement of the ladle car based on the first control circuit 40. The switching switch 30 can be switched from the first state to the second state, for example, the switching switch 30 is a switching switch 30 supporting remote control, so that the state of the switching switch 30 can be directly switched remotely, and for example, in some embodiments, considering the cost, the staff needs to reach the ladle car, and according to the relevant keys / buttons, the switching switch 30 is switched from the first state to the second state.

[0074] After the switching switch 30 is switched from the first state to the second state, for example, the staff needs to move the ladle car forward, and the movement control handle 70 can be operated on the console, for example, the movement control handle 70 is forced to the left side. The movement control handle 70 is connected with the second control circuit 50, which can be wired or wireless connection, so that the staff can operate the movement control handle 70 to control the second control circuit 50, and in actual application, in order to ensure reliability, the movement control handle 70 is usually connected with the second control circuit 50 through a cable. In this example, after the staff operates the movement control handle 70, the second control circuit 50 can be controlled through the cable, and specifically the third switch J3 is turned on and the fourth switch J4 is turned off.

[0075] When the switch 30 is in the second state, the first end of the second control circuit 50 is connected to the first terminal of the frequency converter 20 through the switch 30. The first terminal of the frequency converter 20 is a power terminal, that is, a high level can be provided. In this example, since the switch 30 is in the second state, when the third switch J3 is turned on and the fourth switch J4 is turned off, the frequency converter 20 can detect the terminal 27, that is, the second terminal is high, at this time, the frequency converter 20 can drive the tundish car to move forward through the motor 10. Similarly, if the staff needs to move the tundish car backward, the moving control handle 70 on the console can be operated, for example, the moving control handle 70 is forced to the right side to control the second control circuit 50, that is, the third switch J3 is turned off and the fourth switch J4 is turned on. At this time, since the switch 30 is in the second state, when the third switch J3 is turned off and the fourth switch J4 is turned on, the frequency converter 20 can detect the terminal 28, that is, the third terminal is high, at this time, the frequency converter 20 can drive the tundish car to move backward through the motor 10.

[0076] In one specific embodiment of the present application, the third switch J3 and the fourth switch J4 are interlocking switches, so that when the third switch J3 is turned on, the fourth switch J4 is locked in the off state, and when the fourth switch J4 is turned on, the third switch J3 is locked in the off state.

[0077] This embodiment takes into account that the third switch J3 and the fourth switch J4 do not need to be turned on at the same time, so in order to reduce the error probability of the circuit, the third switch J3 and the fourth switch J4 can be set as interlocking switches, so that when the third switch J3 is turned on, the fourth switch J4 is locked in the off state, and when the fourth switch J4 is turned on, the third switch J3 is locked in the off state. The interlocking of the third switch J3 and the fourth switch J4 can be achieved in various ways, for example, the third switch J3 and the fourth switch J4 can both be realized based on a relay, and through the setting of the circuit structure, the control coils of the two will not be powered at the same time, that is, it is ensured that the two will not be attracted at the same time, so that the interlocking of the third switch J3 and the fourth switch J4 can be realized, that is, at the same time, the two are either turned off at the same time or only one is turned on, and the situation of being turned on at the same time does not occur.

[0078] Further, in actual application, in order to further reduce the error probability, the frequency converter 20 can also be set, if the frequency converter 20 detects that the second terminal and the third terminal are both high, a preset error coping strategy can be adopted, for example, if the frequency converter 20 detects that the second terminal and the third terminal are both high, the tundish car will be controlled to be stationary, that is, the motor 10 will not be driven. Of course, in other specific occasions, other error coping strategies can be set according to actual needs.

[0079] In addition, it also needs to be pointed out that when the mobile control handle 70 controls the movement of the ladle car based on the first control circuit 40, there is a certain failure probability in actual application because the converter controller 60 needs to be passed through, and when the mobile control handle 70 controls the movement of the ladle car based on the second control circuit 50, the control channel of the second control circuit 50 is usually not failed because the control of the second control circuit 50 is usually directly through the cable, that is, the control channel of the second control circuit 50 of the application usually has very high reliability, so after the application of the application scheme, the situation that the control channel of the first control circuit 40 and the control channel of the second control circuit 50 both fail and the movement of the ladle car cannot be controlled usually does not occur.

[0080] In one specific embodiment of the application, the motor 10 can include a single motor unit or multiple parallel working motor units, which ensures the flexibility of the implementation of the application scheme. For example Figure 2 In the example of the motor 10 including two parallel working motor units, denoted as M1 and M2, sufficient power is provided for the movement of the ladle car.

[0081] In one specific embodiment of the application, it can also include an alarm device for outputting alarm information when the switch 30 is in the second state.

[0082] This kind of embodiment takes into account that the switch 30 is in the first state by default, that is, by default, the movement control of the ladle car needs to be realized through the converter controller 60, so when the switch 30 is in the second state, it means that the control channel of the first control circuit 40 has an abnormality, which is probably caused by the failure of the converter controller 60 itself or the failure of related communication devices, so that the switch 30 is switched to the second state. At this time, the alarm device can output alarm information, so that the staff can be reminded, and the control channel of the first control circuit 40 can be repaired in time in the future. The specific implementation of the alarm device can be various, for example, the alarm device can be arranged on the ladle car and output alarm information through indicator lights, buzzers and other devices, and for example, the alarm device can be a special alarm display and output alarm information on the display screen.

[0083] In one specific embodiment of the application, it can also include an emergency brake switch connected with the frequency converter 20, and when the emergency brake switch is in a non-default state, the frequency converter 20 stops supplying power to the motor 10.

[0084] The embodiment considers that in actual application, the molten steel car can be required to be controlled to stop, and thus an emergency brake switch connected with the frequency converter 20 can be arranged. When the emergency brake switch is not operated, the emergency brake switch is in a default state. After the emergency brake switch is operated to be in a non-default state, the frequency converter 20 can detect the situation and immediately stop power supply to the motor 10. Of course, in some embodiments, in order to enable the molten steel car to be immediately stopped, when the emergency brake switch is detected to be in the non-default state, not only the power supply to the motor 10 can be stopped, but also the related brake components can be started, so as to realize timely stopping of the molten steel car. The specific implementation mode of operating the emergency brake switch can be various, for example, in one occasion, a worker is required to operate the related key / button on the molten steel car, so that the emergency brake switch is switched from the default state to the non-default state, and for example, in some occasions, the emergency brake switch is allowed to be remotely operated, for example, the mobile control handle 70 has an operation button of the emergency brake switch, and when the operation button is pressed, the electrical signal is transmitted through the cable, so that the emergency brake switch is switched to the non-default state.

[0085] In one specific embodiment of the utility model, the mobile control handle 70 is a self-resetting mobile control handle 70, so that when the mobile control handle 70 is in a non-default posture due to force, the frequency converter 20 drives the molten steel car to move under the control of the mobile control handle 70 through the motor 10, and when the mobile control handle 70 is not forced, the mobile control handle 70 automatically restores to the default posture, so that the frequency converter 20 stops power supply to the motor 10 under the control of the mobile control handle 70 to keep the molten steel car stationary.

[0086] The embodiment considers that the molten steel car is relatively dangerous because it transports molten steel, and thus theoretically, the forward movement or the backward movement of the molten steel car should be normal movement under control, and if unexpected situation occurs, the molten steel car should not continue to move but should stop in place, which is beneficial to improve safety to a certain extent. For this purpose, in the embodiment, the mobile control handle 70 is a self-resetting mobile control handle 70.

[0087] When the self-resetting mobile control handle 70 is adopted, if the staff operates the mobile control handle 70, the attitude of the mobile control handle 70 can be changed, that is, when the mobile control handle 70 is in a non-default attitude due to force, it indicates that the staff is operating the mobile control handle 70, at this time, the frequency converter 20 can accept the control of the mobile control handle 70 through the first control circuit 40 or the second control circuit 50, and then drive the steel water car to move through the motor 10. Once the staff does not operate the mobile control handle 70, that is, once the mobile control handle 70 is not forced, the mobile control handle 70 can automatically restore to the default attitude. When the mobile control handle 70 is in the default attitude, the frequency converter 20 will stop power supply to the motor 10 to keep the steel water car stationary. For example, in one occasion, the mobile control handle 70 leans to the left, corresponding to the forward movement of the steel water car, the mobile control handle 70 leans to the right, corresponding to the backward movement of the steel water car, and when the mobile control handle 70 is not forced, the mobile control handle 70 will automatically restore to the central state, at this time, the steel water car will be stationary, and the frequency converter 20 will stop power supply to the motor 10 to keep the steel water car stationary. Figure 2 For example, in the circuit structure, when the mobile control handle 70 is not forced and automatically restores to the central state, Figure 2 In the first switch J1, the second switch J2, the third switch J3 and the fourth switch J4, all will be turned off, so that the frequency converter 20 will stop power supply to the motor 10 to keep the steel water car stationary.

[0088] In one embodiment of the present application, the mobile control handle 70 is a spring type self-resetting mobile control handle 70, and the non-default attitude of the mobile control handle 70 includes a first attitude corresponding to the forward movement of the steel water car, and a second attitude corresponding to the backward movement of the steel water car.

[0089] This embodiment considers that the mobile control handle 70 can be a spring type self-resetting mobile control handle 70, which is simple and convenient to realize, and the self-resetting function of the mobile control handle 70 can be easily realized through the spring structure. And this embodiment also considers that in actual application, the steel water car usually moves forward / backward on a special running track, so in this embodiment, the non-default attitude of the mobile control handle 70 only needs to include two kinds, one of which is the first attitude corresponding to the forward movement of the steel water car, for example, in the above example, the mobile control handle 70 is forced to lean to the left, and the other is the second attitude corresponding to the backward movement of the steel water car, for example, in the above example, the mobile control handle 70 is forced to lean to the right.

[0090] Of course, in other embodiments, if the steel water car needs to move freely in the field instead of being limited to forward and backward movement, the mobile control handle 70 can be a steering wheel type mobile control handle 70 to support the free movement of the steel water car, which can be set according to actual needs without affecting the implementation of the present application.

[0091] The technical scheme provided by the embodiment of the utility model can realize the control of the frequency converter 20 of the steel ladle through the two-way control circuit, and guarantees the reliability of the movement control of the steel ladle. Specifically, the change-over switch 30 can be in the first state by default, the first control circuit 40 is connected with the change-over switch 30 and the converter controller 60 respectively, at this time, when the movement control handle 70 is operated, the frequency converter 20 can be controlled through the first control circuit 40, the converter controller 60 and the change-over switch 30 in the first state, so that the frequency converter 20 is controlled by the movement control handle 70 and drives the steel ladle to move through the motor 10. If the converter controller 60 and other devices are abnormal, the above control mode is invalid, the change-over switch 30 can be switched to the second state, since the second control circuit 50 is connected with the change-over switch 30 and the movement control handle 70, at this time, when the movement control handle 70 is operated, the frequency converter 20 can be controlled through the second control circuit 50 and the change-over switch 30 in the second state, so that the frequency converter 20 is controlled by the movement control handle 70 and drives the steel ladle to move through the motor 10. As can be seen, in the scheme of the application, the movement control handle 70 can realize the movement control of the steel ladle through the first control circuit 40 or the second control circuit 50, and the reliability of the movement control of the steel ladle is effectively guaranteed.

[0092] Corresponding to the above embodiment of the steel ladle control system, the utility model embodiment still provides a kind of steel ladle, it can be mutually corresponding with the above reference, the steel ladle can include being arranged on steel ladle: motor, frequency converter, change-over switch, first control circuit and second control circuit.

[0093] Wherein: frequency converter is connected with motor, to be driven by motor under the control of movement control handle, and steel ladle moves;Change-over switch is connected with frequency converter, with first state and second state;

[0094] First control circuit is connected with change-over switch and converter controller respectively;Second control circuit is connected with change-over switch and movement control handle respectively;

[0095] Movement control handle is connected with converter controller, to make when change-over switch is first state, frequency converter is controlled by first control circuit and converter controller and receives movement control handle;When change-over switch is second state, frequency converter is controlled by second control circuit and receives movement control handle

[0096] It should be further understood that, in the specification, relative terms such as first and second should be construed in context and are used only to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises", "comprising", or any other variation thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0097] The principles and implementation manners of the present application are described by using specific examples in the present application. The above example is only used to help understand the technical scheme and core idea of the present application. It should be pointed out that, for ordinary skilled in the art, without departing from the principles of the present application, the present application can be improved and modified in several ways. These improvements and modifications also fall within the protection scope of the present application.

Claims

1. A molten steel car control system characterized by, The utility model relates to a converter control system of converter, including: Motor; Frequency converter for driving the motor to run to drive the converter to move under the control of the movement control handle; Switching switch connected with the frequency converter, having first state and second state; First control circuit connected with the switching switch and converter controller respectively; Second control circuit connected with the switching switch and the movement control handle respectively; Converter controller; The movement control handle connected with the converter controller, so that when the switching switch is the first state, the frequency converter accepts the control of the movement control handle through the first control circuit and the converter controller, when the switching switch is the second state, the frequency converter accepts the control of the movement control handle through the second control circuit.

2. The molten steel car control system according to claim 1, characterized by, The first control circuit includes first switch and second switch; The first end of the first switch is connected with the first end of the second switch, and the connection end is as the first end of the first control circuit, when the switching switch is the first state, the first end of the first control circuit is connected to the first wiring terminal of the frequency converter through the switching switch; The second end of the first switch is connected with the second wiring terminal of the frequency converter, and the second end of the second switch is connected with the third wiring terminal of the frequency converter; Wherein, the first wiring terminal is the power wiring terminal of the frequency converter; The second wiring terminal is the forward wiring terminal of the frequency converter, so that when the switching switch is the first state, and the first switch is turned on under the control of the movement control handle through the converter controller, the frequency converter drives the converter to move forward through the motor; The third wiring terminal is the backward wiring terminal of the frequency converter, so that when the switching switch is the first state, and the second switch is turned on under the control of the movement control handle through the converter controller, the frequency converter drives the converter to move backward through the motor.

3. The molten steel car control system according to claim 1, characterized by, The second control circuit includes third switch and fourth switch; The first end of the third switch is connected with the first end of the fourth switch, and the connection end is as the first end of the second control circuit, when the switching switch is the second state, the first end of the second control circuit is connected to the first wiring terminal of the frequency converter through the switching switch; The second end of the third switch is connected with the second wiring terminal of the frequency converter, and the second end of the fourth switch is connected with the third wiring terminal of the frequency converter; Wherein, the first wiring terminal is the power wiring terminal of the frequency converter; The second wiring terminal is the forward wiring terminal of the frequency converter, so that when the switching switch is the second state, and the third switch is turned on under the control of the movement control handle, the frequency converter drives the converter to move forward through the motor; The third wiring terminal is the backward wiring terminal of the frequency converter, so that when the switching switch is the second state, and the fourth switch is turned on under the control of the movement control handle, the frequency converter drives the converter to move backward through the motor. The third connection terminal is a backward connection terminal of the frequency converter, so that when the switching switch is in the second state and the fourth switch is turned on under the control of the movement control handle, the frequency converter drives the steel ladle to move backward through the motor.

4. The molten steel car control system according to claim 3, characterized by, The third switch and the fourth switch are interlocked switches, so that when the third switch is turned on, the fourth switch is locked in the off state, and when the fourth switch is turned on, the third switch is locked in the off state.

5. The molten steel car control system according to claim 1, characterized by, The motor includes a single motor unit or multiple motor units working in parallel.

6. The molten steel car control system according to claim 1, characterized by, Further comprising: an alarm device for outputting alarm information when the switching switch is in the second state.

7. The molten steel car control system according to claim 1, characterized by, Further comprising: an emergency brake switch connected with the frequency converter, and when the emergency brake switch is in a non-default state, the frequency converter stops supplying power to the motor.

8. The molten steel car control system according to any one of claims 1 to 7, characterized by, The movement control handle is a self-resetting movement control handle, so that when the movement control handle is in a non-default posture due to force, the frequency converter drives the steel ladle to move through the motor under the control of the movement control handle; when the movement control handle is not under force, the movement control handle automatically returns to a default posture, so that the frequency converter stops supplying power to the motor under the control of the movement control handle to keep the steel ladle stationary.

9. The molten steel car control system according to claim 8, characterized by, The movement control handle is a spring-type self-resetting movement control handle, and the non-default postures of the movement control handle include a first posture corresponding to forward movement of the steel ladle and a second posture corresponding to backward movement of the steel ladle.

10. A ladle characterized by comprising: Further comprising: a motor, a frequency converter, a switching switch, a first control circuit, and a second control circuit; The frequency converter is connected with the motor to drive the steel ladle to move through the motor under the control of a movement control handle; the switching switch is connected with the frequency converter and has a first state and a second state. The first control circuit is connected with the switching switch and a converter controller respectively, and the second control circuit is connected with the switching switch and the movement control handle respectively. The movement control handle is connected with the converter controller, so that when the switching switch is in the first state, the frequency converter accepts the control of the movement control handle through the first control circuit and the converter controller; and when the switching switch is in the second state, the frequency converter accepts the control of the movement control handle through the second control circuit.

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