Waste steel baking and preheating device

Abstract

The invention discloses a waste steel baking preheating device, and belongs to the technical field of waste steel baking, the waste steel baking preheating device comprises a heating box and a conveying mechanism used for conveying waste steel into the heating box, a heating mechanism is arranged in the heating box and located above the conveying mechanism, and a plurality of containing baskets used for containing the waste steel are detachably arranged on the conveying mechanism; intermittent rotating mechanisms used for driving the containing baskets to turn over intermittently are arranged on the conveying mechanism and located on the front sides and the rear sides of the containing baskets. Continuous feeding and discharging of the containing baskets are achieved through the conveying mechanism, the preheating process is seamlessly embedded into a continuous production line, and the production efficiency is greatly improved; by means of the intermittent rotating mechanism ingenious in design, the containing basket rotates periodically when being conveyed into the heating box, waste steel is continuously turned over in the containing basket, it is guaranteed that all the surfaces and the interior of the containing basket can be fully exposed to hot air flow, preheating uniformity and heat conduction efficiency are remarkably improved, and local supercooling or superheating is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of scrap steel roasting, and particularly relates to a scrap steel roasting preheating device. BACKGROUND

[0002] As an important raw material in steel smelting, scrap steel needs to be roasted and preheated before entering the furnace to remove harmful impurities such as moisture and oil stains, improve steelmaking efficiency, and reduce energy consumption. The traditional scrap steel preheating method mainly includes two types:

[0003] 1. Batch fixed roasting: the scrap steel is loaded into fixed baskets or hoppers and pushed into a closed roasting furnace for static heating. This method has the advantages of simple equipment, but has inherent defects such as uneven heating (overheating at the top and underheating at the bottom), low thermal efficiency, and discontinuous operation leading to low production efficiency.

[0004] 2. Continuous conveying roasting: the scrap steel is continuously conveyed through a tunnel-type heating furnace by a chain plate or roller. This method realizes continuous operation, but the scrap steel lacks effective turning during the conveying process, and there are still problems of uneven heating and poor adaptability to scrap steel bulkiness, making it difficult to heat through the inside of large scrap steel.

[0005] In recent years, in order to improve the heating uniformity, roasting devices with rotating barrels have appeared. However, such devices face a technical contradiction in realizing continuous production: if the barrel is continuously rotated, it is difficult to effectively connect with the continuous in-out conveying system, and the material conveying path is complex; if it is intermittently rotated, the rotating drive mechanism and the linear conveying mechanism usually interfere with each other in the existing structure, resulting in complex equipment structure, high failure rate, and sealing difficulty.

[0006] Therefore, there is an urgent need in the art for a new scrap steel preheating device that can balance continuous and efficient production and uniform and sufficient heating. SUMMARY

[0007] The purpose of the present application is to provide a scrap steel roasting preheating device to solve the problem that the traditional continuous conveying roasting method cannot effectively turn the scrap steel during the conveying process, and the device with a rotating function is usually designed for batch operation and cannot be seamlessly integrated into a continuous production line, thereby restricting the overall production efficiency.

[0008] To solve the above technical problems, the present application adopts the following technical solutions:

[0009] The present application provides a scrap steel roasting preheating device, which comprises a heating box and a conveying mechanism for conveying scrap steel into the heating box, a heating mechanism is arranged above the conveying mechanism in the heating box, a plurality of holding baskets for holding scrap steel are detachably arranged on the conveying mechanism, and an intermittent rotating mechanism for intermittently turning the holding baskets is arranged on the conveying mechanism at the front and rear sides of the holding baskets.

[0010] Further, the conveying mechanism comprises a rack, and transmission rollers are arranged on the left and right sides of the rack, one of the transmission rollers is connected with a conveying driving motor, two conveying belts are arranged between the left and right transmission rollers.

[0011] Still further, the intermittent rotating mechanism comprises a fixing seat arranged on the top surface of the rack, a plurality of racks are arranged on the fixing seat at equal intervals, a moving seat is connected to the conveying belt through a connecting frame, a rotating shaft is arranged through the moving seat, a gear meshing with the racks is arranged on the outer end of the rotating shaft, and the inner end of the rotating shaft is connected with the containing basket through a butt joint mechanism.

[0012] Still further, a sliding groove is arranged on the fixing seat, and a sliding block matched with the sliding groove is arranged on the moving seat.

[0013] Still further, the cross sections of the sliding groove and the sliding block are trapezoidal.

[0014] Still further, the containing basket comprises a basket body, a basket cover is arranged on the feed inlet of the basket body through a lock buckle, connecting shafts are arranged on the front and rear sides of the basket body, and a handle is arranged on the outer side of the basket body.

[0015] Still further, the butt joint mechanism comprises a first butt joint seat and a second butt joint seat, the first butt joint seat is connected with the rotating shaft, the second butt joint seat is connected with the connecting shaft, and the first butt joint seat and the second butt joint seat are connected through a connecting seat.

[0016] Still further, a first butt joint block extending in a first direction is arranged on the side end face of the connecting seat facing the first butt joint seat, a second butt joint block extending in a second direction is arranged on the side end face of the connecting seat facing the second butt joint seat, the first direction and the second direction intersect, a first butt joint groove matched with the first butt joint block is arranged on the first butt joint seat, and a second butt joint groove matched with the second butt joint block is arranged on the second butt joint seat.

[0017] Still further, the heating mechanism comprises a heating pipe arranged in a gas heating cavity, an air inlet cavity arranged on the rear side of the gas heating cavity, an air inlet pipe arranged on the air inlet cavity, a filter box arranged on the air inlet end of the air inlet pipe, a conveying cavity arranged on the left side of the gas heating cavity, a conveying fan arranged in the conveying cavity, a uniform flow box arranged below the conveying fan, a uniform flow plate arranged below the uniform flow box, a bottom plate arranged below the uniform flow plate, and the containing basket moves between the uniform flow plate and the bottom plate to heat the scrap steel.

[0018] Further, the top of the uniform flow box is provided with an air inlet, the air inlet is located below the air outlet of the conveying fan, the cross-sectional size of the air inlet is smaller than the bottom surface size of the uniform flow box, and the bottom surface of the uniform flow box is provided with a plurality of air outlets.

[0019] Compared with the prior art, the beneficial technical effects of the present application are:

[0020] The present application effectively overcomes the above technical problems by providing a conveying mechanism to continuously feed the holding basket, and combining the intermittent rotation of the holding basket, a scrap steel baking preheating device, and produces the following significant technical effects:

[0021] 1. Perfect combination of high efficiency and continuous and uniform heating: the continuous feeding and discharge of the holding basket are realized by the conveying mechanism, the preheating process is seamlessly embedded into the continuous production line, and the processing capacity per unit time (production efficiency) is greatly improved. By designing a clever intermittent rotation mechanism, the holding basket periodically rotates when conveyed to the inside of the heating box, and the scrap steel continuously turns in the holding basket, ensuring that its surfaces and interior can be fully exposed to the hot air flow, significantly improving the preheating uniformity and heat conduction efficiency, and avoiding local overcooling or overheating.

[0022] 2. Clever structure design, reliable operation: decoupling and cooperative control of continuous linear motion and intermittent rotation. The conveying mechanism is responsible for linear conveying, and the intermittent rotation mechanism drives the holding basket to rotate. This design simplifies the transmission system and avoids complex and easily damaged continuous rotation sealing structures.

[0023] 3. Improve energy utilization efficiency and preheating quality: the uniform turning of scrap steel increases the contact area and contact time with high-temperature air, and heat exchange is more complete, thereby reducing energy consumption per unit output and improving energy utilization efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0024] The present application will be further described below in conjunction with the drawings.

[0025] Figure 1 is a front view of the scrap steel baking preheating device of the present application;

[0026] Figure 2 is a rear view of the scrap steel baking preheating device of the present application;

[0027] Figure 3 is a sectional view of the scrap steel baking preheating device of the present application;

[0028] Figure 4 is a side view of the scrap steel baking preheating device of the present application;

[0029] Figure 5 is a top view of the conveying mechanism of the present application;

[0030] Figure 6 Side view of the delivery mechanism, intermittent rotation mechanism, holding basket frame and docking mechanism of the present application;

[0031] Figure 7 Structure diagram of the intermittent rotation mechanism of the present application;

[0032] Figure 8 Structure diagram of the holding basket frame of the present application;

[0033] Figure 9 Structure diagram of the docking mechanism of the present application;

[0034] Figure 10 Structure diagram of the first docking seat of the present application;

[0035] Figure 11 Structure diagram of the second docking seat of the present application;

[0036] Figure 12 Structure diagram of the connecting seat of the present application;

[0037] Figure 13 Structure diagram of the gas heating cavity and delivery cavity of the present application;

[0038] Figure 14 Structure diagram of the flow uniformizing box, flow uniformizing plate and bottom plate of the present application;

[0039] Figure 15 Structure diagram of the flow uniformizing box and flow uniformizing plate of the present application.

[0040] Explanation of reference numerals: 1, delivery mechanism; 101, rack; 102, transmission roller; 103, delivery belt; 104, delivery driving motor; 2, intermittent rotation mechanism; 201, fixed seat; 202, rack gear; 203, gear; 204, moving seat; 205, sliding groove; 206, sliding block; 207, connecting frame; 208, rotating shaft; 3, holding basket frame; 301, basket frame body; 302, basket cover; 303, lock catch; 304, connecting shaft; 305, handle; 4, docking mechanism; 401, first docking seat; 40101, first docking groove; 402, second docking seat; 40201, second docking groove; 403, connecting seat; 40301, first docking block; 40302, second docking block; 5, heating box; 501, gas heating cavity; 502, delivery cavity; 6, filter box; 7, air inlet pipe; 8, heating pipe; 9, delivery fan; 10, flow uniformizing box; 11, flow uniformizing plate; 12, bottom plate. DETAILED DESCRIPTION

[0041] As Figures 1-15As shown in the figure, a scrap steel roasting preheating device comprises a heating box 5 and a conveying mechanism 1 for conveying scrap steel into the heating box 5, a heating mechanism is arranged in the heating box 5 and above the conveying mechanism 1, a plurality of holding baskets 3 for holding scrap steel are detachably arranged on the conveying mechanism 1, and an intermittent rotation mechanism 2 for intermittently rotating the holding baskets 3 is arranged on the conveying mechanism 1 and at the front and back sides of the holding baskets 3, and the holding baskets 3 are installed between the front and back corresponding intermittent rotation mechanisms 2.

[0042] As shown in the figure, Figure 5 the conveying mechanism 1 comprises a rack 101, driving rollers 102 are rotatably installed on the left and right sides of the rack 101, one of the driving rollers 102 is connected with a conveying driving motor 104, two conveying belts 103 are installed between the left and right driving rollers 102, and the two conveying belts 103 are arranged side by side.

[0043] As shown in the figure, Figures 6-7 the intermittent rotation mechanism 2 comprises a fixed seat 201 connected to the top surface of the rack 101, a plurality of racks 202 are equidistantly installed on the fixed seat 201, a moving seat 204 is connected to the conveying belt 103 through a connecting frame 207, a rotating shaft 208 is installed on the moving seat 204, a gear 203 engaged with the racks 202 is installed on the outer end of the rotating shaft 208, and the inner end of the rotating shaft 208 is connected with the holding basket 3 through the abutting mechanism 4. A sliding groove 205 is formed in the fixed seat 201, and a sliding block 206 matched with the sliding groove 205 is connected to the bottom surface of the moving seat 204; the cross sections of the sliding groove 205 and the sliding block 206 are both designed as trapezoidal shapes, and the trapezoidal structure can prevent the sliding block 206 from escaping from the top opening of the sliding groove 205.

[0044] In operation, the conveying belt 103 drives the moving seat 204 to move, when the gear 203 moves to the rack 202, the gear 203 is engaged with the rack 202, the gear 203 rotates, the rotating shaft 208 rotates, the rotating shaft 208 drives the holding basket 3 to rotate, the scrap steel in the holding basket 3 rolls, the scrap steel can be fully contacted with hot air, and uniform heating is achieved.

[0045] As shown in the figure, Figure 8As shown, the holding basket frame 3 comprises a basket frame body 301, a basket cover 302 is installed at the feed inlet of the basket frame body 301 through a lock catch 303, a connecting shaft 304 is connected to the front and rear sides of the basket frame body 301, and a handle 305 is installed on the outer side of the basket frame body 301. The basket frame body 301 is provided in a hexagonal prism structure, and the bottom surface of the basket frame body 301 is flat, facilitating placement. The basket cover 302 can be removed by opening the lock catch 303, facilitating the addition of scrap steel into the basket frame body 301, which is limited by the basket frame body 301 to prevent the scattering of scrap steel; each surface of the basket frame body 301 has a through hole, ensuring that hot air can enter the basket frame body 301 from all directions to heat the scrap steel.

[0046] As shown in the figure, Figures 9-12 As shown, the docking mechanism 4 comprises a first docking seat 401 and a second docking seat 402, the first docking seat 401 is connected with the rotating shaft 208, the second docking seat 402 is connected with the connecting shaft 304, and the first docking seat 401 and the second docking seat 402 are connected through a connecting seat 403. A first docking block 40301 extending in a first direction is connected to one side end face of the connecting seat 403 facing the first docking seat 401, a second docking block 40302 extending in a second direction is connected to one side end face of the connecting seat 403 facing the second docking seat 402, and the first direction and the second direction intersect; in this embodiment, the included angle between the first direction and the second direction is 90°; the first docking seat 401 is provided with a first docking groove 40101 matched with the first docking block 40301, and the second docking seat 402 is provided with a second docking groove 40201 matched with the second docking block 40302. Through the cooperation of the docking block and the docking groove, quick docking can be realized, and after docking is completed, the rotating shaft 208 and the connecting shaft 304 can rotate synchronously, and due to the existence of the intermittent rotation mechanism 2, the holding basket frame 3 will rotate every time it moves to the position of the rack 202.

[0047] During docking, the first docking block 40301 is first inserted into the first docking groove 40101, thereby connecting the connecting seat 403 and the first docking seat 401 together, then the second docking groove 40201 and the second docking block 40302 are installed together, thereby connecting the second docking seat 402 and the connecting seat 403 together, and the docking work is completed.

[0048] As shown in the figure, Figures 13-15As shown, in the embodiment, five groups of heating mechanisms are arranged in the heating box 5. The heating mechanism comprises a heating pipe 8, which is installed in a gas heating cavity 501, the rear side of the gas heating cavity 501 is connected with an air inlet cavity, the bottom of the air inlet cavity is connected with an air inlet pipe 7, the air inlet end of the air inlet pipe 7 is installed with a filter box 6, the filter box 6 can filter air to prevent impurities from entering the air inlet cavity, the left side of the gas heating cavity 501 is provided with a conveying cavity 502, the conveying cavity 502 is rotatably installed with a conveying fan 9, the outer side of the conveying cavity 502 is installed with a motor for driving the conveying fan 9 to rotate, the lower side of the conveying fan 9 is provided with a uniform flow box 10, the top of the uniform flow box 10 is provided with an air inlet, the air inlet is located below the air outlet of the conveying fan 9, the cross-sectional dimension of the air inlet is smaller than the bottom surface dimension of the uniform flow box 10, the bottom surface dimension of the uniform flow box 10 can be increased to increase the exhaust area, the bottom surface of the uniform flow box 10 is provided with a plurality of exhaust ports, hot air enters the uniform flow box 10 from the air inlet, diffuses in the uniform flow box 10 and is discharged downward through the exhaust ports. The lower side of the uniform flow box 10 is provided with a flow uniformizing plate 11, the lower side of the flow uniformizing plate 11 is provided with a bottom plate 12, the bottom plate 12 is arranged to reduce heat loss through the lower space; the left and right sides of the heating box 5 are respectively provided with an inlet and an outlet, the conveying belt 103 located above the transmission roller 102 enters the heating box 5 from the inlet, drives the holding basket frame 3 to move to the right, heats the scrap steel, and then drives the holding basket frame 3 to leave the heating box 5 from the outlet.

[0049] The working process of the present application is as follows:

[0050] Firstly, the holding basket frame 3 is installed on the intermittent rotating mechanism 2 on the left side of the heating box 5, the conveying mechanism 1 drives the holding basket frame 3 to enter the heating box 5, and the scrap steel in the holding basket frame 3 is heated, due to the existence of the intermittent rotating mechanism 2, the holding basket frame 3 rotates intermittently, so that the scrap steel is fully heated; after heating is completed, the conveying mechanism 1 drives the holding basket frame 3 to move out of the heating box 5, and the staff can take down the holding basket frame 3.

[0051] The above-described embodiments are only used to describe the preferred modes of the present application, and do not limit the scope of the present application, and various modifications and improvements to the technical solutions of the present application made by those skilled in the art without departing from the design spirit of the present application shall fall within the protection scope determined by the claims of the present application.

Claims

1. A scrap preheating device for roasting, characterized by: The utility model provides a waste steel heating device, which comprises a heating box (5) and a conveying mechanism (1) for conveying waste steel into the heating box (5), a heating mechanism is arranged in the heating box (5) and above the conveying mechanism (1), a plurality of containing baskets (3) for containing waste steel are detachably arranged on the conveying mechanism (1), and an intermittent rotating mechanism (2) for driving the containing baskets (3) to intermittently turn over is arranged on the conveying mechanism (1) and at the front and back sides of the containing baskets (3).

2. Scrap preheating device according to claim 1, characterized in that: The conveying mechanism (1) comprises a rack (101), drive rollers (102) are arranged on the left and right sides of the rack (101), one of the drive rollers (102) is connected with a conveying drive motor (104), two conveying belts (103) are arranged between the left and right drive rollers (102), and the two conveying belts (103) are arranged side by side.

3. Scrap preheating device according to claim 2, characterized in that: The intermittent rotating mechanism (2) comprises a fixed seat (201), the fixed seat (201) is arranged on the top surface of the rack (101), a plurality of rack gears (202) are arranged on the fixed seat (201) at equal intervals, a moving seat (204) is connected to the conveying belt (103) through a connecting frame (207), a rotating shaft (208) is arranged through the moving seat (204), a gear (203) is arranged on the outer end of the rotating shaft (208) and engaged with the rack gear (202), and the inner end of the rotating shaft (208) is connected with the containing basket (3) through a butt joint mechanism (4).

4. Scrap preheating device according to claim 3, characterized in that: The fixed seat (201) is provided with a sliding groove (205), and the moving seat (204) is provided with a sliding block (206) matched with the sliding groove (205).

5. Scrap preheating device according to claim 4, characterized in that: The sliding groove (205) and the sliding block (206) are both arranged in a trapezoidal shape.

6. A scrap reheat preheating device according to claim 3, characterized in that: The containing basket (3) comprises a basket body (301), a basket cover (302) is arranged on the feeding port of the basket body (301) through a lock buckle (303), connecting shafts (304) are arranged on the front and back sides of the basket body (301), and a handle (305) is arranged on the outer side of the basket body (301).

7. Scrap preheating device according to claim 6, characterized in that: The butt joint mechanism (4) comprises a first butt joint seat (401) and a second butt joint seat (402), the first butt joint seat (401) is connected with the rotating shaft (208), the second butt joint seat (402) is connected with the connecting shaft (304), and the first butt joint seat (401) and the second butt joint seat (402) are connected through a connecting seat (403).

8. Scrap preheating device according to claim 7, characterized in that: The connecting seat (403) is provided with a first butt joint block (40301) extending in a first direction on one side end face thereof facing the first butt joint seat (401), and is provided with a second butt joint block (40302) extending in a second direction on one side end face thereof facing the second butt joint seat (402), the first direction and the second direction intersecting; the first butt joint seat (401) is provided with a first butt joint groove (40101) matched with the first butt joint block (40301), and the second butt joint seat (402) is provided with a second butt joint groove (40201) matched with the second butt joint block (40302).

9. The scrap reheat preheating device of claim 1, wherein: The heating mechanism comprises a heating pipe (8) arranged in a gas heating cavity (501), a gas inlet cavity is arranged on the rear side of the gas heating cavity (501), an air inlet pipe (7) is arranged on the gas inlet cavity, a filter box (6) is arranged on the air inlet end of the air inlet pipe (7), a conveying cavity (502) is arranged on the left side of the gas heating cavity (501), a conveying fan (9) is arranged in the conveying cavity (502), an uniform flow box (10) is arranged below the conveying fan (9), a uniform flow plate (11) is arranged below the uniform flow box (10), a bottom plate (12) is arranged below the uniform flow plate (11), and the basket (3) moves to between the uniform flow plate (11) and the bottom plate (12) to heat the scrap steel.

10. Scrap roasting preheating device according to claim 9, characterized in that: The top of the uniform flow box (10) is provided with an air inlet, the air inlet is located below the air outlet of the conveying fan (9), the cross-sectional dimension of the air inlet is smaller than the bottom surface dimension of the uniform flow box (10), and the bottom surface of the uniform flow box (10) is provided with a plurality of air outlet openings.

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