Live-line work prevention protection system for direct-current electrolytic cell

Abstract

The invention discloses a direct current electrolytic cell live-line work prevention protection system which comprises an electromagnetic switch, the electromagnetic switch is installed on a crane and used for sensing a magnetic field around a pole plate in an electrolytic cell, the crane comprises a control box, a first control loop and a second control loop are arranged in the control box, and the first control loop comprises a control switch. The control switch is connected with the control end of the executing mechanism, the executing mechanism is used for executing crane operation, the second control loop comprises a controlled part of the control switch, and the controlled part of the control switch is connected with the electromagnetic switch in series. The magnetic field intensity around the surface of the electrolytic cell is detected through the electromagnetic switch, the power failure condition of the electrolytic cell is detected, interlocking is conducted through the first control loop and the second control loop, and control over crane operation is achieved.

Description

Technical Field

[0001] The invention belongs to the field of electrolysis or electrowinning in metallurgical processes, and in particular relates to a direct current electrolytic cell anti-live operation protection system. Background Art

[0002] Electrolysis and electrowinning technologies are important applications in the field of electrochemistry. They play a key role in many industrial processes, such as the production of copper, nickel, lead, zinc, aluminum and other metals. This technology achieves the enrichment and purification of the target metal by setting up cathodes, anodes and electrolytes in electrolytic cells or electrowinning cells. Under the action of direct current, relatively pure metal products are precipitated at the cathode. With the continuous improvement of the scale of industrialization, the current intensity of direct current used in the electrolysis process is getting higher and higher, ranging from 1000A to more than 500000A. Due to the high current intensity, the direct current must be disconnected when performing the slot operation. According to the current intensity and the setting of the switch, the current power-off methods are divided into single slot power-off, group power-off, full series power-off, etc. In actual production, many companies have repeatedly experienced live crane lifting operations due to inadequate power-off confirmation, power-off switch failure, human error, etc. In this process, the strong current easily forms an arc, leading to production accidents such as slot explosion and rectifier system tripping, which seriously threatens the safety of personnel and equipment. At present, the methods for dealing with such accidents are mostly management measures, relying on operators to improve their sense of responsibility and strengthen verification; however, the above management measures cannot fundamentally avoid live lifting operations while driving, nor can they completely eliminate the hidden dangers of such accidents. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art, improve the safety of electrolytic cell operations, and provide a direct current electrolytic cell anti-live operation protection system.

[0004] In order to achieve the above object, the present invention adopts the following technical solution: A DC electrolytic cell protection system for live working includes an electromagnetic switch installed on a crane, the electromagnetic switch is used to sense the magnetic field around the plates in the electrolytic cell, the crane includes a control box, a first control circuit and a second control circuit are arranged in the control box, the first control circuit includes a control switch, the control switch is connected to the control end of an actuator, the actuator is used to perform crane operations, and the second control circuit includes a controlled part of the control switch, the controlled part of the control switch and the electromagnetic switch are connected in series.

[0005] The present invention detects the magnetic field strength around the electrolytic cell surface through an electromagnetic switch to detect the power failure of the electrolytic cell, and interlocks the first control loop and the second control loop to control the crane operation.

[0006] Preferably, the first control loop is used to control the rise of the actuator, and the control switch is connected to the rise control terminal of the actuator.

[0007] Preferably, the actuator comprises a motor and a hanger, the hanger is drivingly connected to the output shaft of the motor, and the control switch is connected to the control end of the motor.

[0008] Preferably, the electromagnetic switch is arranged on the hanger.

[0009] Preferably, the control switch adopts a main contact of a contactor, and the controlled part of the control switch adopts a coil of the contactor.

[0010] Preferably, the cell surface of the electrolytic cell is one of copper, nickel, lead, zinc or aluminum electrolytic cell surfaces.

[0011] Preferably, the electromagnetic switch is a reed switch or a Hall switch.

[0012] Preferably, the height between the electromagnetic switch and the pole plate is 1 to 100 cm.

[0013] Preferably, the first control loop further includes a first switch group, the first switch group is connected in series with the control switch, and the first switch group is used to control the first control loop to be turned on and off.

[0014] Preferably, the second control loop further includes a second switch group, the second switch group is connected in series with the electromagnetic switch, and the second switch group is used to control the opening and closing of the second control loop.

[0015] The present invention realizes interlocking control of the lifting and rising operation of the crane, eliminates the risk of accidents such as tank explosion and rectifier tripping caused by the live lifting of the pole plate by the crane when the tank surface is not powered off during the electrolysis operation, and ensures the safety of personnel and equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings: Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 is a circuit diagram of a first control loop of the present invention; Figure 3 It is a circuit diagram of the second control loop of the present invention.

[0017] Explanation of the reference numerals: 1. electrolytic cell; 2. electrode plate; 3. electromagnetic switch; 4. wire; 5. crane; 51. lifting device; 52. control box; 53. motor. DETAILED DESCRIPTION

[0018] like Figure 1As shown, a DC electrolytic cell protection system for live working provided by the present invention includes an electromagnetic switch 3, which is installed on a crane 5. The electromagnetic switch 3 is used to sense the magnetic field around the plate 2 in the electrolytic cell 1. The crane 5 includes a control box 52, in which a first control circuit and a second control circuit are arranged. The first control circuit is used to control the rise of the actuator, and the electromagnetic switch 3 is connected to the second control circuit through a wire 4. The actuator is used to perform the crane operation, and the actuator includes a motor 53 and a hanger 51. The electromagnetic switch 3 is arranged on the hanger 51. The hanger 51 is drivingly connected to the output shaft of the motor 53.

[0019] like Figure 2 As shown, the first control circuit includes a control switch and a first switch group. The control switch uses the main contact KM-1 of the contactor, and the main contact KM-1 of the contactor is connected to the rising control end of the motor M. The first switch group includes a circuit breaker Q1, a disconnect switch K1 and a gear switch K2. The circuit breaker Q1 is used to realize overcurrent thermal protection, the disconnect switch K1 is used to realize the disconnection of the main power supply of the motor M, and the gear switch K2 is used for gear switching. The present invention detects the magnetic field strength around the electrolytic cell surface through an electromagnetic switch to detect the power failure of the electrolytic cell, and interlocks the first control circuit and the second control circuit to realize the control of the crane operation.

[0020] like Figure 3 As shown, the second control circuit includes the controlled part of the control switch and the second switch group. The controlled part of the control switch adopts the coil KM of the contactor. The coil KM of the contactor is connected in series with the electromagnetic switch GHG. The second switch group includes the power control switch K3, the emergency switch K4 and the limit switch K5. The power control switch K3 is used to control the power on and off of the second control circuit. The emergency switch K4 is used to quickly cut off the second control circuit of the control coil KM. The limit switch K5 is used to limit the lifting distance of the actuator to prevent the lifting exceeding the safe height and damaging the pulley block.

[0021] The electromagnetic switch is a normally closed switch. The electromagnetic switch can be a reed switch or a Hall switch. In this embodiment, a normally closed reed switch GHG is used.

[0022] In this embodiment, the cell surface of the electrolytic cell 1 is one of copper, nickel, lead, zinc or aluminum electrolytic cell surfaces.

[0023] In this embodiment, since the current passing through the pole plate 2 is relatively high and the magnetic field strength generated is large, the sensing range of the electromagnetic switch 3 is also increased accordingly. Therefore, the height between the electromagnetic switch 3 and the pole plate 2 is 1 to 100 cm.

[0024] In this embodiment, when used specifically: the sling 51 descends, driving the electromagnetic switch 3 to descend to a certain range of height from the plate 2 in the electrolytic cell 1, and preparing for the lifting operation. When the electrolytic cell surface is not completely powered off, the direct current through the plate 2 forms an electromagnetic field around the plate 2, and the electromagnetic intensity is sensed by the electromagnetic switch 3, and then the signal sensed by the electromagnetic switch 3 is connected to the control box 52 of the crane 5 through the wire 4. By interlocking the second control circuit and the first control circuit in the control box 52, after the normally closed electromagnetic switch 3 receives the electromagnetic signal, the second control circuit is disconnected, and the coil KM loses power, so that the contactor contact KM1 of the first control circuit cannot be closed, and the motor M in the actuator will also be unable to operate, thereby preventing the sling 51 from performing the lifting action, and preventing the occurrence of live lifting accidents.

[0025] The present invention realizes interlocking control of the lifting and rising operation of the crane, eliminates the risk of tank explosion and rectifier tripping caused by the live lifting of the pole plate by the crane when the tank surface is not powered off during the electrolysis operation, and ensures the safety of personnel and equipment.

[0026] The above are only preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined by the claims.

Claims

1. A DC electrolytic cell anti-live operation protection system, characterized in that: It includes an electromagnetic switch, which is installed on a crane and is used to sense the magnetic field around the plates in the electrolytic cell. The crane includes a control box, in which a first control loop and a second control loop are arranged. The first control loop includes a control switch, which is connected to the control end of an actuator, and the actuator is used to perform crane operations. The second control loop includes a controlled part of the control switch, and the controlled part of the control switch is connected in series with the electromagnetic switch.

2. The DC electrolyzer anti-live working protection system according to claim 1 is characterized in that: The first control loop is used to control the rise of the actuator, and the control switch is connected to the rise control end of the actuator.

3. The DC electrolyzer anti-live working protection system according to claim 1 is characterized in that: The actuator comprises a motor and a hanger, the hanger is drivingly connected to the output shaft of the motor, and the control switch is connected to the control end of the motor.

4. The DC electrolyzer anti-live working protection system according to claim 3 is characterized in that: The electromagnetic switch is arranged on the lifting device.

5. The DC electrolyzer anti-live working protection system according to claim 1 is characterized in that: The control switch adopts the main contact of the contactor, and the controlled part of the control switch adopts the coil of the contactor.

6. The DC electrolyzer anti-live working protection system according to claim 1 is characterized in that: The cell surface of the electrolytic cell is one of copper, nickel, lead, zinc or aluminum electrolytic cell surfaces.

7. The DC electrolyzer anti-live working protection system according to claim 1 is characterized in that: The electromagnetic switch adopts a reed switch or a Hall switch.

8. The DC electrolyzer anti-live working protection system according to claim 1 is characterized in that: The height between the electromagnetic switch and the pole plate is 1 to 100 cm.

9. The DC electrolyzer anti-live working protection system according to claim 1, characterized in that: The first control loop also includes a first switch group, which is connected in series with the control switch, and the first switch group is used to control the first control loop to be turned on and off.

10. The DC electrolyzer anti-live working protection system according to claim 1, characterized in that: The second control loop further includes a second switch group, which is connected in series with the electromagnetic switch, and the second switch group is used to control the second control loop to be turned on and off.

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