Electrolytic insulation monitoring and early warning device

Abstract

The utility model discloses an electrolytic insulation monitoring and early warning device which comprises a control box body, a protective door is hinged to the control box body, a start key and a rotating lock are arranged on the protective door, the rotating lock is connected with the control box body and the protective door in a locking mode, and an intelligent digital display instrument is arranged above the start key on the protective door. A hollow wiring row and a mounting frame are arranged in the control box body, the hollow wiring row is arranged above the mounting frame, an electric control system is arranged on the inner wall of the protective door, the electric control system is electrically connected with a start key and an intelligent digital display instrument, an alarm is arranged above the intelligent digital display instrument, and the intelligent digital display instrument is electrically connected with the control box body. A warning device extends out of the top wall of the control box body, and a circuit breaker, a relay and a wiring terminal are sequentially installed on the installation frame from left to right. The utility model belongs to the technical field of voltage monitoring of an aluminum electrolysis cell, and particularly relates to an electrolytic insulation monitoring and early warning device, which overcomes the phenomena that people are hurt by arc light at a bus-to-ground ignition short circuit port due to slight carelessness when ground insulation is damaged, even a series of emergency power failure is caused, and the phenomenon that abnormal voltage cannot be found in time.

Description

Technical Field

[0001] The utility model belongs to the technical field of aluminum electrolytic cell voltage monitoring, in particular to an electrolytic insulation monitoring and early warning device. Background Art

[0002] Aluminum reduction cells are key equipment in aluminum electrolysis production. They are powered by a special, non-groundable DC power supply system. The powerful current flows through a series of busbars and the reduction cells, forming a circuit. Therefore, the reliability and safety of the reduction cell power supply are essential for ensuring normal electrolytic production, a key focus of daily maintenance, and a crucial factor in ensuring continuous and stable aluminum electrolysis production and improving current efficiency.

[0003] In recent years, the continuous increase in aluminum electrolytic cell production capacity and the length of series busbars have also increased. This makes it particularly important to test the insulation of the entire series to ground. The voltage drop per cell is calculated as 4V (in practice, the cell voltage is often higher than 4V to maintain temperature). This results in very high voltages to ground at both ends of the series. If the insulation of the aluminum electrolytic cell and the series busbar supports is poor, the voltage in a certain part of the cell can increase, increasing power loss and posing a significant threat to the safety of electrolytic production personnel and the series, thus affecting the normal production and use of the cell. Jinlian Aluminum Co., Ltd.'s 400kA and 500kA series were built in 2013, 2015, and 2017, respectively. A total of 368 400KA series electrolytic cells were installed, all connected in series. Under normal circumstances, with good insulation between the rectifier busbars and the aluminum electrolytic cells (ignoring abnormal voltages such as induced voltage), the positive busbar voltage to ground is approximately 750V, the negative busbar voltage is approximately -750V, and the symmetrical midpoint busbar voltage to ground is approximately zero volts. During startup or during the induced voltage phase of individual electrolytic cells, the busbar voltage may fluctuate slightly. However, in actual production, if insulation is damaged by human intervention or strong magnetism, a busbar-to-ground short circuit can cause arcing, injuries, and even emergency power outages. This presents a significant risk that disrupts safe and stable electrolytic production. Therefore, it is crucial to detect busbar-to-ground voltage fluctuations early, analyze them promptly, and identify voltage anomalies on a daily basis, providing guidance to the electrolysis workshop on addressing the insulation of the relevant electrolytic cells to prevent busbar-to-ground flashes.

[0004] Currently, the ground voltage in the first, second, and third series electrolysis work areas fluctuates frequently, making it impossible for the work areas to directly monitor the fluctuations. Consequently, on-duty dispatchers are required to notify each work area of ​​the ground voltage excursion data. However, due to the heavy workload and long hours spent on-site, on-duty dispatchers are unable to ensure that ground voltage excursion data is promptly communicated to the work areas. Utility Model Content

[0005] The technical problem to be solved by the present invention is that if the insulation to the ground is damaged, a busbar to ground short circuit may occur and arc flash may injure people, or even cause a series of emergency power outages, and the voltage anomaly cannot be discovered in time.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: The electrolytic insulation monitoring and early warning device proposed in the present invention includes a control box body, a protective door is hinged on the control box body, a start button and a rotary lock are provided on the protective door, the rotary lock is locked to the control box body and the protective door, an intelligent digital display instrument is provided above the start button on the protective door, a hollow wiring row and a mounting frame are provided in the control box body and the hollow wiring row is provided above the mounting frame, an electrical control system is provided on the inner wall of the protective door, the electrical control system is electrically connected to the start button and the intelligent digital display instrument, an alarm is installed above the intelligent digital display instrument, an alarm extends from the top wall of the control box body, and a circuit breaker, a relay and a terminal are installed on the mounting frame from left to right.

[0007] As an improvement, the electrical control system includes a PLC partition controller and a starter, and the PLC partition controller and the starter are both arranged on the inner wall of the protective door.

[0008] As an improvement, the starter is electrically connected to the start key, the intelligent digital display instrument and the PLC partition controller, and the PLC partition controller is electrically connected to the start key.

[0009] As an improvement, the alarm is electrically connected to the starter and is electrically controlled to the siren.

[0010] As an improvement, the circuit breaker, relay and connection terminal are electrically connected to the starter and alarm respectively.

[0011] As an improvement, the starter is connected to twenty work areas.

[0012] The beneficial effects achieved by the utility model using the above structure are as follows: the electrolytic insulation monitoring and early warning device proposed in this scheme collects and detects positive and negative voltages to the ground in real time. At the same time, it has an audible and visual alarm function when the voltage deviates, so that the electrolysis work area can discover and deal with insulation faults in the first time, thereby achieving the purpose of ensuring the safe and stable operation of the electrolytic cell and effectively avoiding electric shock accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of the electrolytic insulation monitoring and early warning device proposed in the utility model;

[0014] Figure 2 It is a cross-sectional view of the utility model;

[0015] Figure 3This is a cross-sectional view from another perspective of the present invention.

[0016] Among them, 1. Control box; 2. Protective door; 3. Start button; 4. Rotary lock; 5. Intelligent digital display instrument; 6. Hollow wiring bar; 7. Mounting bracket; 8. Electrical control system; 9. Alarm; 10. Siren; 11. Circuit breaker; 12. Relay; 13. Terminal block; 14. PLC partition controller; 15. Starter. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] like Figure 1-3 As shown, the electrolytic insulation monitoring and early warning device proposed by the utility model includes a control box 1, a protective door 2 is hinged on the control box 1, a start button 3 and a rotary lock 4 are provided on the protective door 2, the rotary lock 4 locks the control box 1 and the protective door 2, and an intelligent digital display instrument 5 is provided above the start button 3 on the protective door 2. A hollow wiring row 6 and a mounting frame 7 are provided in the control box 1, and the hollow wiring row 6 is provided above the mounting frame 7. An electric control system 8 is provided on the inner wall of the protective door 2, and the electric control system 8 is electrically connected to the start button 3 and the intelligent digital display instrument 5. An alarm 9 is installed above the intelligent digital display instrument 5, and an alarm 10 extends from the top wall of the control box 1. A circuit breaker 11, a relay 12 and a terminal block 13 are installed on the mounting frame 7 from left to right.

[0019] like Figure 2 、 3 As shown, the electrical control system 8 includes a PLC partition controller 14 and a starter 15, both of which are arranged on the inner wall of the protective door 2; the starter 15 is electrically connected to the start key 3, the intelligent digital display instrument 5 and the PLC partition controller 14, and the PLC partition controller 14 is electrically connected to the start key 3; the alarm 9 is electrically connected to the starter 15 and is electrically connected to the alarm 10; the circuit breaker 11, the relay 12 and the terminal 13 are electrically connected to the starter 15 and the alarm 9 respectively; the starter 15 is connected to twenty work areas.

[0020] When used, the intelligent digital display meter 5 adopts a dedicated integrated instrument chip, and the measurement input and transmission output adopt digital correction and self-calibration technology to measure accurately and stably, eliminating the measurement error caused by temperature drift and time drift. At the same time, the intelligent digital display meter 5 adopts surface mounting technology and is designed with multiple isolation designs. It has strong anti-interference ability, high reliability, and high cost performance. It has multi-type input programmable function. One intelligent digital display meter 5 can be equipped with different input signals: thermocouple, thermal resistor, linear voltage, linear current, linear resistance, frequency, etc. At the same time, the display range, alarm control, etc. can be set on site, and can be used with Various types of circuit breakers 11, relays 12 and terminal blocks 13 are used in conjunction to realize the measurement, display, alarm, collection and recording of the ground voltage. The alarm 9 and the siren 10 are controlled by the starter 15 to sound an alarm. The intelligent digital display instrument 5 uses a single-row two-digit LED to display the measured value and the set value, and uses a two-color light column to simulate the percentage of the measured value. In addition, the starter 15 collects 4-20mA signals and directly connects them to the devices installed in the work area through cables to play a real-time monitoring role. When the detected ground voltage data reaches the upper and lower limits, the siren 10 will be activated to alarm. The sound and light signals must reach the normal value of the ground voltage before they can be restored.

[0021] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

[0022] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. An electrolytic insulation monitoring and early warning device, comprising a control box (1), wherein a protective door (2) is hingedly connected to the control box (1), and characterized in that: The protective door (2) is provided with a start button (3) and a rotary lock (4), the rotary lock (4) is locked to the control box (1) and the protective door (2), an intelligent digital display instrument (5) is provided above the start button (3) on the protective door (2), a hollow wiring row (6) and a mounting frame (7) are provided in the control box (1), and the hollow wiring row (6) is provided above the mounting frame (7), an electric control system (8) is provided on the inner wall of the protective door (2), the electric control system (8) is electrically connected to the start button (3) and the intelligent digital display instrument (5), an alarm (9) is installed above the intelligent digital display instrument (5), an alarm (10) extends from the top wall of the control box (1), and a circuit breaker (11), a relay (12) and a terminal (13) are installed on the mounting frame (7) from left to right.

2. The electrolytic insulation monitoring and early warning device according to claim 1, characterized in that: The electric control system (8) comprises a PLC partition controller (14) and a starter (15), and the PLC partition controller (14) and the starter (15) are both arranged on the inner wall of the protective door (2).

3. The electrolytic insulation monitoring and early warning device according to claim 2, characterized in that: The starter (15) is electrically connected to the start key (3), the intelligent digital display instrument (5) and the PLC partition controller (14), and the PLC partition controller (14) is electrically connected to the start key (3).

4. The electrolytic insulation monitoring and early warning device according to claim 3, characterized in that: The alarm (9) is electrically connected to the starter (15) and is electrically controlled to the alarm (10).

5. The electrolytic insulation monitoring and early warning device according to claim 4, characterized in that: The circuit breaker (11), relay (12) and connection terminal (13) are electrically connected to the starter (15) and alarm (9) respectively.

6. The electrolytic insulation monitoring and early warning device according to claim 5, characterized in that: The starter (15) is connected to twenty work areas.

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