An automatic unloading system for tank cars in the electrolytic aluminum industry

Abstract

The utility model discloses a kind of automatic unloading systems of electrolytic aluminium industry tank car, belong to industrial automation control technical field, including control box, control box is hollow cuboid, the front of control box is provided with swing door, power supply, time relay, intermediate relay one and intermediate relay two are separately provided in control box;Unloading pipe, the top of unloading pipe is separately provided with total gas valve, blow valve and intelligent digital display pressure switch;Swing door, swing door is set in the front of control box, the front of swing door is separately provided with start switch, running indicator and stop switch.The automatic unloading system of electrolytic aluminium industry tank car, unloading compressed air blow valve is controlled using DCV safety voltage intelligent pressure switch, effectively avoid personnel electric shock accident, and set unloading pressure interval, can be realized one-key unloading opening, after unloading is finished, system is automatically stopped, without personnel observing unloading pressure at all times, avoid the security risk of pressure high and low.

Description

Technical Field

[0001] This utility model relates to the field of industrial automation control technology, and in particular to an automatic unloading system for tank trucks in the electrolytic aluminum industry. Background Technology

[0002] In electrolytic aluminum production, raw materials are transported to the electrolysis workshop by tank trucks and unloaded using compressed air pneumatic conveying. Traditional unloading methods are highly dependent on manual operation: operators need to manually open and control the pneumatic valves on the compressed air pipeline and must be on duty at all times, constantly observing the reading of the intelligent digital pressure switch for unloading, and manually adjusting the valve opening based on experience to maintain the unloading pressure.

[0003] The aforementioned traditional manual operation mode has many significant drawbacks and safety hazards: the entire process requires dedicated personnel for monitoring and operation, consuming a large amount of human resources; maintenance personnel experience high labor intensity; pressure control accuracy is poor; and operators cannot accurately and in real-time grasp and control the unloading pressure. If the unloading pressure suddenly rises abnormally, exceeding the pressure limit of the tank or conveying pipeline, it can easily lead to serious safety accidents such as tanker explosions or pipeline ruptures, threatening the safety of personnel and equipment. Conversely, if the pressure suddenly drops or is insufficient, it can easily lead to blockage of the conveying pipeline, affecting the continuity and stability of production. Utility Model Content

[0004] To address the issues of low automation in tank truck unloading, the inability of personnel to accurately control unloading pressure, and the resulting safety hazards for those responsible for unloading, this utility model provides an automatic tank truck unloading system for the electrolytic aluminum industry. The technical solution is as follows:

[0005] An automatic unloading system for tank trucks in the electrolytic aluminum industry includes a control box, which is a hollow cuboid with a movable door on the front. Inside the control box are a power supply, a time relay, an intermediate relay one, and an intermediate relay two.

[0006] The unloading pipe is equipped with a main air valve, an auxiliary blowing valve, and an intelligent digital display pressure switch at its top.

[0007] The movable door is located on the front of the control box, and a start switch, a running indicator light, and a stop switch are respectively provided on the front of the movable door.

[0008] Preferably, the power supply is located in the middle of the control box, and the time relay, intermediate relay one and intermediate relay two are all located at the bottom of the power supply and are arranged in order from left to right.

[0009] Preferably, the start switch, run indicator light, and stop switch are on the same horizontal line and arranged in order from left to right, and a warning sign is provided on the front of the movable door.

[0010] Preferably, the start switch is connected in parallel with the coil of the time relay.

[0011] Preferably, the intermediate relay is provided with a normally open delayed closing contact, which is connected in series with the coil of the intermediate relay.

[0012] Preferably, the intermediate relay has a second normally open contact, which is connected in series with the coil of the main gas valve.

[0013] Preferably, the intelligent digital display pressure switch is connected in parallel between the phase line L and the neutral line N for monitoring system pressure.

[0014] Preferably, the operation indicator light is connected in parallel in the control loop to indicate the operating status of the device.

[0015] Preferably, the stop switch is connected in series between the phase line L and the subsequent control circuit to cut off the power supply to the control circuit.

[0016] Beneficial effects:

[0017] The beneficial effects of adopting the technical solution of this utility model are as follows:

[0018] 1. This automatic unloading system for tank trucks in the electrolytic aluminum industry uses a DCV safety voltage intelligent pressure switch to control the unloading compressed air blowing valve, which effectively avoids electric shock accidents. It also sets the unloading pressure range, enabling one-button unloading start. The system automatically stops after unloading is completed, eliminating the need for personnel to constantly monitor the unloading pressure and avoiding the safety hazards of fluctuating pressure.

[0019] 2. In this automatic unloading system for tank trucks in the electrolytic aluminum industry, if the pressure is lower than the pressure range, the auxiliary blowing valve will automatically adjust the valve opening; if the pressure is higher than the pressure range, the auxiliary blowing valve will automatically close; if the pressure is lower than .MPa, it indicates that the tank truck unloading is complete, and the system will automatically stop. In case of emergency, the system can be stopped with one button via the stop switch to interrupt the unloading operation in time, avoid the risk of damage to the tank truck or material pipe, reduce the labor intensity of maintenance personnel, ensure safe material use in the electrolytic series, and improve the automation and inherent safety of the equipment. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0021] Figure 1This is a schematic diagram of the internal structure of the control box of an automatic unloading system for tank trucks in the electrolytic aluminum industry according to this utility model.

[0022] Figure 2 This is a front view structural diagram of the movable door of an automatic unloading system for tank trucks in the electrolytic aluminum industry according to this utility model;

[0023] Figure 3 This is a schematic diagram of the unloading pipe structure of an automatic unloading system for tank trucks in the electrolytic aluminum industry according to this utility model;

[0024] Figure 4 This is a schematic diagram of the circuit structure of an automatic unloading system for tank trucks in the electrolytic aluminum industry.

[0025] In the diagram, 1. Control box; 2. Unloading pipe; 3. Movable door; 4. Power supply; 5. Time relay; 6. Intermediate relay one; 7. Intermediate relay two; 8. Start switch; 9. Running indicator light; 10. Stop switch; 11. Main air valve; 12. Auxiliary blowing valve; 13. Intelligent digital display pressure switch. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0027] like Figure 1-3 As shown, an automatic unloading system for tank trucks in the electrolytic aluminum industry includes a control box 1. The control box 1 is a hollow cuboid. A movable door 3 is provided on the front of the control box 1. Inside the control box 1, there are a power supply 4, a time relay 5, an intermediate relay 6, and an intermediate relay 7. The power supply 4 is located in the middle of the control box 1. The time relay 5, the intermediate relay 6, and the intermediate relay 7 are all located at the bottom of the power supply 4 and are arranged in order from left to right.

[0028] The top of the discharge pipe 2 is equipped with a main air valve 11, an auxiliary blowing valve 12 and an intelligent digital display pressure switch 13.

[0029] The movable door 3 is located on the front of the control box 1. The front of the movable door 3 is equipped with a start switch 8, a running indicator light 9, and a stop switch 10. The start switch 8, the running indicator light 9, and the stop switch 10 are on the same horizontal line and arranged in order from left to right. Warning signs are provided on the front of the movable door 3.

[0030] In this embodiment, the bottom of the start switch 8, the run indicator light 9, and the stop switch 10 are all provided with corresponding instructions, which can be used to complete the operation intuitively and reduce the learning cost.

[0031] like Figure 1-4 As shown, the start switch 8 is connected in parallel with the coil of the time relay 5, the intermediate relay 6 is equipped with a normally open delayed closing contact, the normally open delayed closing contact is connected in series with the coil of the intermediate relay 6, and the intermediate relay 7 has a second normally open contact, the second normally open contact is connected in series with the coil of the main gas valve 11.

[0032] It should be noted that the operation indicator light 9 is connected in parallel in the control circuit to indicate the operating status of the device, and the stop switch 10 is connected in series between the phase line L and the subsequent control circuit to cut off the power supply to the control circuit.

[0033] In this embodiment, the intelligent digital display pressure switch 13 is connected in parallel between the phase line L and the neutral line N to monitor the system pressure. When the pressure is higher than the pressure range, the main air valve 11 and the auxiliary blowing valve 12 will automatically close.

[0034] The method of using this utility model is as follows:

[0035] The unloading pressure range is set to 0.28-0.29 MPa. If the pressure is lower than 0.28 MPa, the blowing valve 12 will automatically adjust the valve opening. If the pressure is higher than 0.29 MPa, the blowing valve 12 will automatically close. If the pressure is lower than 0.1 MPa, it means that the tank truck unloading is complete and the system will automatically stop. In case of emergency, the system can be stopped with one button by the stop switch 10 to interrupt the unloading operation in time and avoid the risk of damage to the tank truck or material pipe.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An automatic unloading system for tank trucks in the electrolytic aluminum industry, characterized in that, include: Control box (1), the control box (1) is a hollow cuboid, the front of the control box (1) is provided with a movable door (3), and the control box (1) is provided with a power supply (4), a time relay (5), an intermediate relay one (6) and an intermediate relay two (7). The top of the discharge pipe (2) is respectively equipped with a main air valve (11), an auxiliary blowing valve (12) and an intelligent digital display pressure switch (13). The movable door (3) is located on the front of the control box (1). The front of the movable door (3) is provided with a start switch (8), a running indicator light (9) and a stop switch (10).

2. The automatic unloading system for tank trucks in the electrolytic aluminum industry according to claim 1, characterized in that, The power supply (4) is located in the middle of the control box (1). The time relay (5), intermediate relay one (6) and intermediate relay two (7) are all located at the bottom of the power supply (4) and are arranged in order from left to right.

3. The automatic unloading system for tank trucks in the electrolytic aluminum industry according to claim 1, characterized in that, The start switch (8), the running indicator (9) and the stop switch (10) are on the same horizontal line and arranged in order from left to right. The front of the movable door (3) is provided with a warning sign.

4. The automatic unloading system for tank trucks in the electrolytic aluminum industry according to claim 1, characterized in that, The start switch (8) is connected in parallel with the coil of the time relay (5).

5. An automatic unloading system for tank trucks in the electrolytic aluminum industry according to claim 4, characterized in that, The intermediate relay (6) is equipped with a normally open delayed closing contact, which is connected in series with the coil of the intermediate relay (6).

6. The automatic unloading system for tank trucks in the electrolytic aluminum industry according to claim 1, characterized in that, The intermediate relay 2 (7) has a second normally open contact, which is connected in series with the coil of the main gas valve (11).

7. An automatic unloading system for tank trucks in the electrolytic aluminum industry according to claim 1, characterized in that, The intelligent digital display pressure switch (13) is connected in parallel between the phase line L and the neutral line N to monitor the system pressure.

8. An automatic unloading system for tank trucks in the electrolytic aluminum industry according to claim 1, characterized in that, The operation indicator (9) is connected in parallel in the control loop to indicate the operating status of the device.

9. An automatic unloading system for tank trucks in the electrolytic aluminum industry according to claim 1, characterized in that, The stop switch (10) is connected in series between the phase line L and the subsequent control circuit to cut off the power supply to the control circuit.

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