Automatic operation device for driving high-power electromagnetic iron remover through electric hoist

Abstract

The utility model discloses an automatic operation device for driving a high-power electromagnetic iron remover through an electric hoist, which belongs to the technical field of aluminum electrolysis equipment, solves the problems that the labor intensity of field staff is higher and the stable operation of an electrolytic aluminum production process is seriously influenced, and comprises an electromagnetic iron remover, a controller and an electric hoist, a hoisting system of the electric hoist is connected with a controller through an automatic control system, the controller is connected with a manual control system in parallel, the electric hoist is arranged on an electric hoist support, an iron attracting position inductive switch and an iron removing position inductive switch are arranged on the electric hoist support, and an electromagnetic iron remover is connected below the electric hoist. A weight sensor is arranged between the electric hoist and the electromagnetic iron remover; a circuit of the controller comprises a contactor, a time relay, an inductive switch, an auxiliary contact and a button switch. According to the utility model, the workload of field operators is further reduced, and the process production requirements of materials are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of aluminum electrolysis equipment, and specifically relates to an automatic operation device that drives a high-power electromagnetic iron remover through an electric hoist. Background Art

[0002] The crushed material used for sealing the aluminum electrolytic cell is a mixed agglomerate of electrolyte, alumina, and fluoride salts naturally formed on the surface of the anode in the electrolytic cell during the production process. Due to the high-temperature oxidation during the electrolytic production process, a layer of ferrophosphorus oxide layer is usually formed on the surface of the anode guide rod. After the anode used in the electrolytic cell is periodically replaced, the anode surface agglomerates are usually cleaned, crushed, and used again for the anode covering of the electrolytic cell production surface. However, during the cleaning process, the agglomerates are tightly bonded to the ferrophosphorus oxide layer, and the agglomerates often contain a large amount of ferrophosphorus and ferrophosphorus-containing materials. After passing through the crushing system, the ferrophosphorus in the agglomerates can be physically separated from the required materials as much as possible. Ferrophosphorus and any substance containing iron are quality indicators that need to be strictly controlled in the electrolytic aluminum production process. Excessive iron recovery entering the electrolytic aluminum system will seriously affect the electrolytic aluminum production process.

[0003] In the daily crushing production process, due to the large amount of crushing, the crushed materials need to go through two production processes, namely coarse crushing and fine crushing. A total of three sets of high-power electromagnetic iron removal equipment are installed at both ends of the two crushing production processes. Since the crushed materials need to be transported through three long belts, the installation distance of the three sets of high-power electromagnetic iron removal equipment is also relatively long. In the daily crushing process, personnel need to constantly check the three sets of high-power electromagnetic iron removal equipment. Once it is found that the amount of iron absorbed is large, the electromagnetic iron remover must be manually remotely controlled to the discharge port to release the material. Therefore, based on the current manual control of high-power electromagnetic iron removal equipment in the crushing system, it is urgent to design a device that can operate automatically and can effectively reduce the labor intensity of employees and improve the iron removal efficiency of the crushing system. Utility Model Content

[0004] The utility model aims to provide an automatic operation device which drives a high-power electromagnetic iron remover through an electric hoist, so as to solve the problem that the labor intensity of on-site workers is high and the iron content of crushed materials remains high, which seriously affects the smooth operation of the electrolytic aluminum production process.

[0005] The technical scheme of the utility model is: an automatic operation device for driving a high-power electromagnetic iron remover through an electric hoist, comprising an electromagnetic iron remover, a controller and an electric hoist, a hoisting system of the electric hoist being connected with the controller through an automatic control system, the controller being connected with a manual control system in parallel, and the manual control system and the automatic control system being convertibly connected; the electric hoist being movably arranged on an electric hoist bracket, an iron absorption position induction switch and an iron removal position induction switch being arranged on the electric hoist bracket, the electromagnetic iron remover being connected below the electric hoist, and a weight sensor being arranged between the electric hoist and the electromagnetic iron remover; a circuit of the controller comprising a contactor, a time relay, an induction switch, an auxiliary contact and a button switch, the contactor comprising an iron removal contactor, a main contactor, a trolley left-travel contactor and a trolley right-travel contactor, the time relay comprising a first time relay and a second time relay, the induction switch comprising a first iron absorption position induction switch, a second iron absorption position induction switch, a first iron removal position induction switch and a second iron removal position induction switch, the auxiliary contacts comprising a normally open auxiliary contact and a normally closed auxiliary contact, and the button switch comprising an emergency stop button and a start button.

[0006] Furthermore, the circuit of the controller is a circuit having four branches connected in parallel on the power supply, the first branch is the first auxiliary contact of the main contactor and the main contactor connected in series in sequence, and the first auxiliary contact of the main contactor is connected in series with a start button; the second branch is the second auxiliary contact of the main contactor, the first iron removal position sensing switch, the first iron absorption position sensing switch and the iron remover contactor connected in series in sequence, the normally open auxiliary contact of the trolley left contactor is connected in parallel between the first iron removal position sensing switch and the iron remover contactor, the first time relay and the first time relay auxiliary contact connected in series in sequence, the normally closed auxiliary contact of the trolley right contactor, and the left contactor of the trolley are respectively connected in parallel between the first iron removal position sensing switch and the power supply; the third branch is the second time relay auxiliary contact, the second iron absorption position sensing switch, the normally closed auxiliary contact of the trolley left contactor and the trolley right contactor connected in series in sequence; the fourth branch is the second iron removal position sensing switch and the second time relay connected in series in sequence, and an insurance and an emergency stop button are also connected in series between the power supply and the parallel branches.

[0007] Furthermore, the controller model is S7-200PLC.

[0008] Furthermore, the iron absorption position sensing switch and the iron removal position sensing switch are spring limit switches.

[0009] Furthermore, the electric hoist lifting system is a winch lifting system.

[0010] The beneficial effects of the utility model are as follows: the automatic suction and discharge process of the electric hoist carrying a high-power electromagnetic iron remover is realized through the controller, the original manual system is retained, and an automatic operation system is added, which can realize the free conversion between automatic and manual modes. The automatic operation mode has a reliable mechanical limit and automatic judgment timing system, which further reduces the workload of on-site operators, avoids the problem of excessive iron content in crushed materials due to untimely operation, and ensures the process production requirements of materials.

[0011] The utility model connects various limit protection signals, manual control signals, and automatic / manual conversion signals in the controller, realizes that all control instructions are output synchronously by the PLC, and achieves complete physical isolation of control signals, output signals, execution signals, and execution voltages, which not only ensures the safety of personnel during operation, but also ensures the hierarchical protection of equipment.

[0012] The control program of the utility model has clearer running logic, and the priority running level is manual. When the system is switched to manual state, it is assumed that inspection, maintenance and debugging work is being carried out, and the automatic iron removal system will not be triggered at this time; the second priority is the iron removal weight. If the iron removal weight reaches the limit value, the system will automatically lift the iron remover to the specified position, and automatically carry the absorbed iron-containing material to the discharge port to release the material. After the release is completed, it will continue to return to the top of the belt conveyor, and then descend to the specified position to start the electromagnetic iron remover to continue working; the last level is timed iron removal. When the material absorption exceeds the specified time, but the iron removal weight does not reach the set value, the system will automatically perform a round of automatic iron removal and restart a new round of timing to achieve the dual protection of automatic control mode, weight sensing and timing action.

[0013] The control limit selection of the utility model is safer and more reliable. The mechanical spring limit switch is used to solve the swing problem of the high-power electromagnetic iron remover during automatic operation. It has a larger sensing range and stronger flexibility after collision, and can effectively eliminate the confusion of the calculation program caused by the inertial swing when the operation stops. For the control of the rising and falling height of the winch, an electromagnetic induction switch is adopted, which has more sensitive action, more accurate sensing control range and better dustproof effect. For the weight sensing switch, the double-strand steel wire rope fixed end installation method of the lifting weight limiter is adopted, and the sensing weight is converted and measured according to 1 / 2 of the actual weight, and the measurement data is more accurate.

[0014] The internal procedures of the utility model are relatively rigorous and complicated, but the overall installation and debugging are extremely simple, and the original equipment can be fully utilized. Only some limit sensors and control switches need to be added. The overall production cost is low, and the effect is good after on-site use, which effectively reduces the labor intensity of on-site operators and improves the iron removal efficiency of the crushing system.

[0015] The controller uses S7-200PLC, which has the advantages of lower price and higher stability. It also has extremely high reliability, extremely rich instruction set, easy to master, convenient operation, rich built-in integrated functions, real-time characteristics, strong communication capabilities, and rich expansion modules, so it has a very high performance / price ratio.

[0016] The mechanical spring limit switch is selected, which has the advantages of larger sensing range, stronger flexibility after collision, high reliability, good stability, wide applicability and easy maintenance.

[0017] The winch lifting system is selected, which has the advantages of simple structure, low cost, simplicity, speed, space saving, high versatility, compact structure, small size, light weight, large lifting capacity, easy use and transfer, and is more suitable for vertical lifting work scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the control block diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 3 It is a side view of the electric hoist and the electromagnetic iron remover in the utility model;

[0021] Figure 4 This is a top view of the structure of the utility model;

[0022] Figure 5 This is the circuit diagram of the automatic control system in the utility model.

[0023] In the figure: 1-electric hoist; 2-electric hoist bracket; 3-iron suction position induction switch; 4-iron removal position induction switch; 5-electric hoist high position; 6-electric hoist low position; 7-electromagnetic iron remover; 8-weight sensor; FR-insurance; KM-iron remover contactor; KAM1-main contactor; KAM1-1-main contactor first auxiliary contact; KAM1-2-main contactor second auxiliary contact; KAM2-trolley left contactor; KAM2-1-trolley left contactor normally open auxiliary contact; KAM2-2-trolley left contactor Normally closed auxiliary contact of the contactor; KAM3-trolley right contactor; KAM3-1-normally closed auxiliary contact of the trolley right contactor; KT1-first time relay; KT1-1-first time relay auxiliary contact; KT2-second time relay; KT2-1-second time relay auxiliary contact; SP-emergency stop button; SB-start button; SQ suction 1-first iron absorption position sensing switch; SQ suction 2-second iron absorption position sensing switch; SQ removal 1-first iron removal position sensing switch; SQ removal 2-second iron removal position sensing switch. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] like Figure 1-Figure 5 As shown, an automatic operation device for a high-power electromagnetic iron remover driven by an electric hoist includes an electromagnetic iron remover 7, a controller and an electric hoist 1, the lifting system of the electric hoist 1 is connected to the controller through an automatic control system, the controller is connected in parallel with a manual control system, and the manual control system and the automatic control system are switchably connected; the electric hoist 1 is movably arranged on an electric hoist bracket 2, and an iron absorption position sensing switch 3 and an iron removal position sensing switch 4 are arranged on the electric hoist bracket 2, the electromagnetic iron remover 7 is connected below the electric hoist 1, and a weight sensor 8 is arranged between the electric hoist 1 and the electromagnetic iron remover 7; the circuit of the controller includes a connection Contactors, time relays, induction switches, auxiliary contacts and push button switches, the contactors include iron remover contactor KM, main contactor KAM1, trolley left contactor KAM2 and trolley right contactor KAM3, the time relays include the first time relay KT1 and the second time relay KT2, the induction switches include the first iron absorption position induction switch SQ absorption 1, the second iron absorption position induction switch SQ absorption 2, the first iron removal position induction switch SQ removal 1 and the second iron removal position induction switch SQ removal 2, the auxiliary contacts include normally open auxiliary contacts and normally closed auxiliary contacts, the push button switches include the emergency stop button SP and the start button SB.

[0026] The circuit of the controller is that four branches are connected in parallel on the power supply. The first branch is the first auxiliary contact KAM1-1 and the main contactor KAM1 of the main contactor connected in series in sequence. The first auxiliary contact KAM1-1 of the main contactor is connected in series with a start button SB. The second branch is the second auxiliary contact KAM1-2 of the main contactor, the first iron removal position sensing switch SQ1, the first iron absorption position sensing switch SQ1 and the iron remover contactor KM connected in series in sequence. The normally open auxiliary contact KAM2-1 of the left contactor of the trolley is connected in parallel between the first iron removal position sensing switch SQ1 and the iron remover contactor KM. The first iron removal position sensing switch SQ1 is connected in parallel with the power supply. The first time relay KT1 and the first time relay auxiliary contact KT1-1, the trolley right contactor normally closed auxiliary contact KAM3-1, and the trolley left contactor KAM2 are connected in series in sequence between the power sources in parallel; the third route is the second time relay auxiliary contact KT2-1, the second iron absorption position sensing switch SQ2, the trolley left contactor normally closed auxiliary contact KAM2-2 and the trolley right contactor KAM3 connected in series in sequence; the fourth route is the second iron removal position sensing switch SQ2 and the second time relay KT2 connected in series in sequence, and a fuse FR and an emergency stop button SP are also connected in series between the power supply and the parallel branch.

[0027] The controller model is S7-200PLC.

[0028] The iron absorption position sensing switch 3 and the iron removal position sensing switch 4 are spring limit switches.

[0029] The lifting system of the electric hoist 1 is a winch lifting system.

[0030] A travel specified position limit control switch is installed in the original electric hoist 1 driving the high-power electromagnetic iron remover 7 system, that is, the electric hoist 1 includes an electric hoist high position 5 and an electric hoist low position 6, so as to control the lifting limit; a lifting weight control switch, that is, a weight sensor 8, is installed on the wire rope of the winch system; electromagnetic induction switches, that is, an iron absorption position induction switch 3 and an iron removal position induction switch 4, are installed at the upper and lower specified positions of the winch system to realize automatic position monitoring and signal feedback of the equipment operation, and a control box for the automatic operation device of the electric hoist 1 driving the high-power electromagnetic iron remover 7 is installed at a reasonable position on site.

[0031] The original electric hoist 1 drives the high-power electromagnetic iron remover 7 remote control system, and all control instructions are connected to the automatic control system PLC.

[0032] The original electric hoist 1 drives all the action output execution instructions of the high-power electromagnetic iron remover 7 to be connected to the time relay output end of the automatic control system.

[0033] The automatic operation device of the electric hoist 1 driving the high-power electromagnetic iron remover 7 is adjusted to operate the specified weight, timing time, and operation process time program.

[0034] The electric hoist 1 runs and the trolley is located at the initial limit switch, that is, the first iron-absorbing position sensing switch SQ is at position 1. The main contactor KAM1 is started by controlling the start button SB, and the iron remover contactor KM is energized. At the same time, the first time relay KT1 starts timing, and the first time relay KT1 is triggered for 3 minutes. The left contactor KAM2 of the trolley is energized, and the trolley runs to the second iron removal position sensing switch SQ at position 2, and the iron remover contactor KM is released. At the same time, the second time relay KT2 is triggered for timing for 3 seconds, and the right contactor KAM3 of the trolley is energized. The trolley runs to the first iron removal position sensing switch SQ at position 1, and the iron remover contactor KM is energized.

Claims

1. An automatic operation device for driving a high-power electromagnetic iron remover by an electric hoist, comprising an electromagnetic iron remover, characterized in that: It also includes a controller and an electric hoist (1), wherein the lifting system of the electric hoist (1) is connected to the controller via an automatic control system, the controller is connected in parallel to a manual control system, and the manual control system and the automatic control system are switchably connected; the electric hoist (1) is movably arranged on an electric hoist bracket (2), the electric hoist bracket (2) is provided with an iron absorption position sensing switch (3) and an iron removal position sensing switch (4), the lower part of the electric hoist (1) is connected to an electromagnetic iron remover (7), and a weight sensor (8) is provided between the electric hoist (1) and the electromagnetic iron remover (7); the circuit of the controller includes a contactor, a time relay, a sensing switch, an auxiliary contact Point and push button switches, the contactors include an iron remover contactor (KM), a main contactor (KAM1), a trolley left contactor (KAM2) and a trolley right contactor (KAM3), the time relay includes a first time relay (KT1) and a second time relay (KT2), ​​the induction switch includes a first iron absorption position induction switch (SQ1 absorption), a second iron absorption position induction switch (SQ absorption 2), a first iron removal position induction switch (SQ removal 1) and a second iron removal position induction switch (SQ removal 2), the auxiliary contacts include a normally open auxiliary contact and a normally closed auxiliary contact, and the push button switch includes an emergency stop button (SP) and a start button (SB).

2. According to claim 1, an automatic operation device for driving a high-power electromagnetic iron remover by an electric hoist, characterized in that: The circuit of the controller is that four branches are connected in parallel on the power supply, the first branch is the first auxiliary contact (KAM1-1) of the main contactor and the main contactor (KAM1) connected in series, and the first auxiliary contact (KAM1-1) of the main contactor is connected in series with a start button (SB); the second branch is the second auxiliary contact (KAM1-2) of the main contactor, the first iron removal position sensing switch (SQ removal 1), the first iron absorption position sensing switch (SQ absorption 1) and the iron remover contactor (KM) connected in series, the first iron removal position sensing switch (SQ removal 1) and the iron remover contactor (KM) are connected in series, the trolley left contactor normally open auxiliary contact (KAM2-1) is connected in parallel between the first iron removal position sensing switch (SQ removal 1) and the iron remover contactor (KM), the first iron removal position sensing switch (SQ removal 1) and the iron remover contactor (KM) are connected in parallel with the first iron removal position sensing switch (SQ removal 1) and the iron removal position sensing switch (SQ removal 1). The first time relay (KT1) and the first time relay auxiliary contact (KT1-1), the trolley right contactor normally closed auxiliary contact (KAM3-1), and the trolley left contactor (KAM2) are connected in series in sequence between the power supplies in parallel; the third route is the second time relay auxiliary contact (KT2-1), the second iron absorption position sensing switch (SQ absorption 2), the trolley left contactor normally closed auxiliary contact (KAM2-2) and the trolley right contactor (KAM3) connected in series in sequence; the fourth route is the second iron removal position sensing switch (SQ removal 2) and the second time relay (KT2) connected in series in sequence, and a fuse (FR) and an emergency stop button (SP) are also connected in series between the power supply and the parallel branch.

3. The automatic operation device for driving a high-power electromagnetic iron remover by an electric hoist according to claim 1 or 2, characterized in that: The controller model is S7-200PLC.

4. The automatic operation device for driving a high-power electromagnetic iron remover by an electric hoist according to claim 3, characterized in that: The iron absorption position sensing switch (3) and the iron removal position sensing switch (4) are spring limit switches.

5. The automatic operation device for driving a high-power electromagnetic iron remover by an electric hoist according to claim 4, characterized in that: The electric hoist (1) lifting system is a winch lifting system.

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