Scrap steel conveying feeding device capable of improving weighing accuracy

Abstract

A waste steel conveying feeding device capable of improving weighing accuracy comprises a first hopper arranged at the end of a waste steel apron conveyor, a weighing overturning hopper is arranged on one side of the first hopper and comprises a supporting platform, a weighing sensor is arranged below a corner column of the supporting platform, a receiving hopper is arranged above the supporting platform, and the weighing sensor is arranged below the corner column of the supporting platform. One end of the receiving hopper is rotatably connected with the supporting platform, and the other end is driven by a hydraulic cylinder to rotate. According to the feeding device capable of improving the weighing accuracy and used for conveying the waste steel, the weighing accuracy can be improved, and meanwhile preheating of the waste steel is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of scrap steel conveying, especially to a scrap steel conveying feeding device capable of improving weighing accuracy. BACKGROUND

[0002] The patent "a continuous feeding and distributing device and method of smelting furnace capable of weighing and metering" with the application number "202110455147.X" is an invention patent applied before the present application. The device has the following defects:

[0003] 1) The traditional feeding method is to feed the scrap steel stacked on the ground to the horizontal vibration conveyor or feeding trolley on the high platform by the crown block. The crown block needs to go back and forth to take the material many times, which is very cumbersome, time-consuming and labor-consuming, and is accompanied by the problems of high-altitude material dropping after the crown block takes the material and dust pollution.

[0004] 2) The weighing system is installed below the conveyor belt of the scale board conveyor. The force transmitted by the weighing element sensing moving parts changes all the time, and the different degrees of wear and deformation of each scale board and chain can cause the contact with the weighing element to malfunction easily, which cannot provide accurate cumulative weighing information.

[0005] 3) Before steelmaking, the smelting furnace needs to consume a lot of electricity and fuel to raise the temperature of the furnace body to drive the temperature of the scrap steel to the vicinity of the melting point, so the preheating process is long and very energy-consuming. The surface of the scrap steel block contains a lot of moisture and oxides, and a certain amount of electricity and fuel is consumed to raise the temperature of the furnace body before steelmaking to preheat the scrap steel and volatilize these impurities. In addition, during the steelmaking process, the supply of scrap steel at room temperature will cause the temperature of the furnace to drop suddenly, affecting the smelting effect. SUMMARY

[0006] The technical problem to be solved by the utility model is to provide a scrap steel conveying feeding device capable of improving weighing accuracy, which changes the weighing method to ensure more accurate weighing detection; at the same time, the scrap steel can be preheated to reduce the cost of later steelmaking and improve the smelting effect.

[0007] To solve the above technical problems, the utility model adopts the following technical scheme:

[0008] A scrap steel conveying feeding device capable of improving weighing accuracy, comprising a first hopper arranged at the end of a scrap steel scale board machine, a weighing turnover hopper is arranged on one side of the first hopper, the weighing turnover hopper comprises a support platform, a weighing sensor is arranged below the corner column of the support platform, a receiving hopper is arranged above the support platform, one end of the receiving hopper is rotatably connected with the support platform, and the other end of the receiving hopper is driven to rotate by a hydraulic oil cylinder.

[0009] The scrap steel feeding turnover weighing hopper is opened towards one side of the first hopper.

[0010] The first hopper and the weighing tumbler are each provided with a guide rail, and a gas cover is slidably arranged on the guide rail and driven to move left and right by an electro-hydraulic push rod.

[0011] The utility model provides a waste steel conveying loading device that can improve weighing accuracy, and has the following technical effects:

[0012] 1. The first hopper and the weighing tumbler are arranged at the input end of the waste steel scale board machine, and the weighing tumbler has the advantages of random spatial arrangement, large storage capacity, full-load operation, load addition during operation, and start-stop operation, and the efficiency of feeding the melting furnace by the weighing tumbler is dozens of times that of the traditional feeding trolley. The overhead crane can feed the material tank of the waste steel scale board machine when the melting furnace is not in operation or during the idle time, so as to prepare for the next steelmaking, and most of the time can be used for material classification, transfer, and concentration in the waste steel yard. Therefore, the waste steel scale board machine cooperates with the weighing tumbler, the weighing tumbler can meet the feeding requirement of the waste steel scale board machine for a long time after being filled once, and time and labor are saved during steelmaking feeding, the operation is continuous, stable, noiseless, and dust-free and environmentally friendly.

[0013] 2. The weighing sensor installed at the weighing tumbler can realize static weighing, and the weighing accuracy is greatly improved compared with the dynamic weighing by the weighing element arranged below the conveying belt in "202110455147.X".

[0014] 3. The gas cover can recycle the excess coal gas in the coking plant, preheat the waste steel, remove the moisture and oxides on the surface of the waste steel, and heat the waste steel to a certain temperature before entering the melting furnace, which can shorten the smelting time and reduce energy consumption, and avoid the poor smelting quality caused by the sudden temperature drop when the waste steel at room temperature enters the furnace, thereby ensuring the smelting effect. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model will be further described in connection with the drawings and examples:

[0016] Figure 1 It is the front view of the utility model.

[0017] Figure 2 It is the front view of the weighing tumbler in the utility model (non-tumbler state).

[0018] Figure 3 It is the front view of the weighing tumbler in the utility model (tumbler state).

[0019] In the diagram: 1. First hopper, 2. Weighing tilting hopper, 3. Guide rail, 4. Scrap steel scale machine, 5. Gas hood, 6. Electro-hydraulic actuator, 7. Air duct, 2-1. First guide rail, 2-2. Receiving hopper, 2-3. Thermocouple, 2-4. Support platform, 2-5. Hydraulic cylinder, 2-6. Angle column, 2-7. Weighing sensor, 2-8. First rotating shaft, 5-1. Combustion fan, 5-2. Detailed Implementation

[0020] like Figure 1 As shown, a scrap steel conveying device that improves weighing accuracy includes a first hopper 1 located at the input end of a scrap steel slab feeder 4. A weighing tilting hopper 2 is installed on one side of the first hopper 1. Guide rails 3 are fixed above both the first hopper 1 and the weighing tilting hopper 2, facing each other. A roller is installed at the lower end of a gas hood 5, which moves left and right on the guide rails 3, allowing the gas hood 5 to move above either the first hopper 1 or the weighing tilting hopper 2. The gas hood 5 is pushed by an electro-hydraulic actuator 6. Multiple burners 5-2 are installed on the upper surface of the outer shell of the gas hood 5, and the burners 5-2 are connected to a gas pipe. The gas at the other end of the gas pipe is drawn from excess coal gas from a coking plant. A combustion-supporting fan 5-1 is installed on the end plate of the gas hood 5, which introduces outside air to mix with the coal gas in the pipeline for complete combustion. By installing a gas hood 5, the scrap steel inside the symmetrically tilting bucket 2 can be baked. This preheating process maintains a higher temperature after the scrap steel enters the melting furnace, shortening smelting time and reducing energy consumption. Furthermore, it removes impurities from the scrap steel. These impurities mainly include abundant moisture adhering to the surface, rust from surface oxidation, and a small amount of crystal water and free water within the metal. After impurity removal, the ash from combustion is carried away with the dense smoke by air blowing.

[0021] like Figures 2-3 As shown, the weighing tilting hopper 2 includes a support platform 2-4. A weighing sensor 2-7 is installed below the corner post 2-6 of the support platform 2-4. A receiving hopper 2-2 is installed above the support platform 2-4. The receiving hopper 2-2 has an opening at one end facing the hopper of the scrap steel slab machine 4 (no side panel is provided for side unloading) to facilitate unloading. The receiving hopper 2-2 is rotatably mounted on the support platform 2-4 on the side (head) facing the first hopper 1 of the scrap steel slab machine 4 via a first rotating shaft 2-8. The tail of the receiving hopper 2-2 is driven by a hydraulic cylinder 2-5 to tilt around the axis of the first rotating shaft 2-8.

[0022] In addition, thermocouples 2-3 are installed on the inner wall of the weighing tilting bucket 2. The PCL control system has a fixed temperature detected by the thermocouples at a specified time, which facilitates temperature control.

[0023] Through the grab steel machine or the crown block to the weighing flip bucket 2, the weighing sensor 2-7 respectively analyzes and processes the weight signal of each time the scrap steel after the impurity removal, obtains the cumulative amount of the weight of each molten steel during the smelting period, and facilitates the smelting of special steel to add elements, and accurately obtains the matching rate.

[0024] The process of reading the weighing signal belongs to static weighing, which is different from the past setting of weighing elements under the conveying belt of the scrap steel scale board machine 4, avoiding the uneven force of the elements caused by the operation of the conveying belt, and the accuracy can reach 1 / 1000.

[0025] Working principle and process:

[0026] 1), When the weighing flip bucket 2 detects that the gas cover 5 moves above the weighing flip bucket 2, the gas valve of the gas pipe is opened and ignited through the PCL control system, and the combustion-supporting fan 5-1 is started, and the scrap steel in the connecting bucket 2-2 is roasted.

[0027] 2), When the temperature information fed back by the thermocouple 2-3 reaches the temperature setting value, the PCL control system respectively closes the gas and oxygen valves and the combustion-supporting fan 5-1.

[0028] 3), Start the electro-hydraulic push rod 3, and move the gas cover 5 above the first bucket 1 of the scrap steel scale board machine 4. When the proximity switch above the first bucket 1 detects that the gas cover 5 is in place, the weighing system reads the value of the preheated scrap steel and counts the information. At the same time, the hydraulic cylinder 2-5 of the weighing flip bucket 2 and the scrap steel scale board machine 4 are started. The hydraulic cylinder 2-5 slowly pushes the connecting bucket 2-2 upward to the designed angle, and the scrap steel in the connecting bucket 2-2 falls into the scrap steel scale board machine 4 along with the upward rotation of the connecting bucket 2-2. After a specified time, the PCL control system controls the hydraulic cylinder 2-5 to return to the original position.

[0029] 4), When the proximity switch on the hydraulic cylinder 2-5 feeds back that the connecting bucket 2-2 completes the rotation and returns to the original position, the sound and light alarm beside the worker's operating position is turned off, prompting the worker to feed the weighing flip bucket 2 again for the next scrap steel preheating and conveying.

Claims

1. A feeding device for scrap conveying capable of improving weighing accuracy, characterized by: The utility model provides a waste steel loading system, which comprises a first hopper (1) arranged at the end of a waste steel scale board machine (4), a weighing turnover hopper (2) arranged at one side of the first hopper (1), a supporting platform (2-4) of the weighing turnover hopper (2), a weighing sensor (2-7) arranged below the corner column (2-6) of the supporting platform (2-4), a receiving hopper (2-2) arranged above the supporting platform (2-4), one end of the receiving hopper (2-2) being rotatably connected with the supporting platform (2-4), and the other end of the receiving hopper (2-2) being driven to rotate through a hydraulic oil cylinder (2-5). The upper ends of the first hopper (1) and the weighing turnover hopper (2) are each provided with a guide rail (3), a gas cover (5) is slidably arranged on the guide rail (3) and is driven to move left and right through an electro-hydraulic push rod (6), the outer shell of the gas cover (5) is provided with a plurality of burners (5-2), the burners (5-2) are connected with a gas pipe, and the gas of the other end of the gas pipe is introduced from the excess gas of a coking plant.

2. The feeding device for scrap steel conveying with improved weighing accuracy according to claim 1, characterized in that: The waste steel loading system is provided with the weighing turnover hopper, and the waste steel can be loaded into the first hopper (1) through the weighing turnover hopper.

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