Bulk material conveying system and method for large sintering flue

Abstract

The invention discloses a large sintering flue bulk material conveying system and method, and belongs to the field of large sintering flue bulk material conveying. The device comprises a plurality of sintering machine large flue bulk bins which are transversely distributed, an upper conveying pipeline is arranged at the lower ends of the sintering machine large flue bulk bins in a surrounding mode, and a lower conveying pipeline is arranged at the lower end of the upper conveying pipeline. The problems that at present, a large flue bulk material collecting device of a sintering machine is an adhesive tape machine, under the condition of double flues, bulk materials are finally collected to a finished product adhesive tape machine, three bulk material adhesive tape machines need to be arranged in the process, all the three adhesive tape machines need to be subjected to full-sealing dust removal, and the process is relatively complex are solved. Quantitative bulk materials are fed into the lower conveying pipeline driven by the chain by opening the cinder valve, and after the bulk materials are gathered in the gathering cavity in the lower conveying pipeline, the chain can drive the pushing disc to push the bulk materials after being driven by the transmission gear.

Description

Technical Field

[0001] The present invention relates to the field of sintering large flue bulk material transportation, and specifically to a sintering large flue bulk material transportation system and method. Background Art

[0002] The iron ore powder sintering process is an important production process in the modern iron and steel industry, providing indispensable qualified raw materials for blast furnace ironmaking. Modern sintering production is a suction sintering process, that is, a mixture of iron ore powder, solvent, fuel and return ore is formed in a certain proportion, with an appropriate amount of water added. After mixing and pelletizing, it is spread on the trolley of the belt sintering machine and ignited under a certain negative pressure. The whole sintering process is carried out from top to bottom under negative pressure suction. Since the sintering machine is a negative pressure suction sintering, a small amount of fine materials will enter the flue and gradually deposit, so it needs to be cleaned in time, otherwise the flue will be blocked and production will be affected.

[0003] At present, the bulk material collection device for the large flue of the sintering machine is a belt conveyor. In the case of a double flue, the bulk material in the flue enters the bulk material bin, and the bulk material is discharged to the lower belt conveyor at regular intervals through a double-layer ash discharge valve, and finally converges to the finished product belt conveyor. This process requires the setting of three bulk material belt conveyors. With the improvement of environmental protection requirements, all three belt conveyors need to be fully sealed for dust removal, a large number of dust removal pipelines need to be arranged, and the processing capacity of the dust collector needs to be increased. The system is relatively complex, requires a large layout space, and the investment cost is also relatively high. Summary of the Invention

[0004] The purpose of the present invention is to provide a sintering large flue bulk material transportation system and method. By opening the ash discharge valve, a certain amount of bulk material is sent into the internal lower material transportation pipeline driven by a chain. After the bulk material converges in the converging cavity inside the lower material transportation pipeline, the chain drives the pushing plate to push the bulk material after being driven by the transmission gear, so that the bulk material approaches the discharge pipeline and falls from the discharge pipeline position, solving the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A sintering large flue bulk material transportation system includes a plurality of sintering machine large flue bulk material bins distributed horizontally. The lower end of the sintering machine large flue bulk material bin is surrounded by an upper material transportation pipeline. The lower end of the upper material transportation pipeline is provided with a lower material transportation pipeline. One side of the lower end of the sintering machine large flue bulk material bin facing the upper material transportation pipeline is provided with an ash discharge valve for restricting material discharge. The lower end of the ash discharge valve is provided with a feed inlet. An activity track is recessed along the upper material transportation pipeline inside the upper material transportation pipeline. A chain is arranged in the middle of the activity track facing the upper end of the converging cavity. The chain is stuck between the upper material transportation pipeline and the lower material transportation pipeline. One side inside the chain is provided with a transmission gear, and the outside of the transmission gear is meshed and connected with the outside of the chain.

[0006] Preferably, a head steering mechanism is provided at the upper end outside the transmission gear, and the head steering mechanism is fixedly welded to the outer wall of the upper feeding pipeline.

[0007] Preferably, the chain forms a loop at the movable rail position inside the upper feeding pipeline.

[0008] Preferably, a converging chamber is provided inside the lower feeding pipeline.

[0009] Preferably, the feeding port and the converging chamber are hermetically connected through a connecting pipe, and a flow chamber is provided through the inside of the connecting pipe.

[0010] Preferably, push plates are evenly distributed along the trajectory of the chain at the lower end of the chain, and the push plates are located inside the converging chamber.

[0011] Preferably, a driving motor is provided at the upper end of the head steering mechanism, and the output shaft of the driving motor passes through the head steering mechanism and is fixedly welded to the transmission gear.

[0012] Preferably, a discharge pipeline is provided on the lower feeding pipeline at the lower end position of the head steering mechanism, and the discharge pipeline is hermetically connected to the lower feeding pipeline.

[0013] The present invention provides another technical solution: a method for transporting sintered large flue duct bulk materials, which is realized based on a sintered large flue duct bulk material transportation system, and includes the following steps:

[0014] S1: Let the flue duct bulk materials fall into the sintering machine large flue duct bulk material bin, open the valve at the upper end of the ash discharge valve, close the valve at the lower end of the ash discharge valve, and the bulk materials enter the ash discharge valve.

[0015] S2: Close the valve at the upper end of the ash discharge valve, open the valve at the lower end of the ash discharge valve, so that the bulk materials enter the flow chamber inside the connecting pipe from the feeding port at the lower end of the ash discharge valve, and the bulk materials inside the flow chamber fall into the converging chamber inside the lower feeding pipeline by gravity.

[0016] S3: Start the driving motor, the output shaft of the driving motor drives the transmission gear to rotate, the rotation of the transmission gear drives the chain to move inside the movable rail, and further drives the push plate to move at the position of the converging chamber inside the lower feeding pipeline.

[0017] S4: The push plate pushes the bulk materials collected inside the converging chamber, so that the bulk materials move towards the discharge pipeline, and the bulk materials fall and are discharged after moving to the upper end of the discharge pipeline.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] After the ash discharge valve of the bulk material bin of the sintering machine of the present invention is opened, the bulk material flows into the flow cavity inside the connecting pipe from the feed port, and then the bulk material directly converges and enters the converging cavity inside the lower conveying pipeline. During the whole process, there will be no dust emission and material leakage, and no additional dust removal device is required, which reduces the equipment investment cost. On the other hand, multiple bulk material bins of the sintering machine flue are respectively connected to the lower conveying pipeline by corresponding connecting pipes. The separate pipeline connection enhances the convenience of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the front view of the conveying system of the present invention;

[0021] Figure 2 is the top view of the conveying system of the present invention;

[0022] Figure 3 is the side view of the positional relationship of the bulk material bin of the sintering machine flue of the present invention;

[0023] Figure 4 is the schematic diagram of the external structure of the upper conveying pipeline of the present invention;

[0024] Figure 5 is the cross-sectional view of the chain drive structure of the present invention;

[0025] Figure 6 is of the present invention Figure 5 partial structure plan view.

[0026] In the figure: 1, head steering mechanism; 2, upper conveying pipeline; 3, driving motor; 4, discharging pipeline; 5, bulk material bin of sintering machine flue; 6, chain; 7, ash discharge valve; 8, feed port; 9, connecting pipe; 10, transmission gear; 11, movable track; 12, pushing disk; 13, converging cavity; 14, flow cavity; 15, lower conveying pipeline. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The present invention will be further described below in conjunction with specific embodiments.

[0028] As Figure 1 and Figure 2 shown, a sintering flue bulk material conveying system in an embodiment of the present invention includes a plurality of bulk material bins 5 of sintering machine flues distributed horizontally. The lower ends of the plurality of bulk material bins 5 of sintering machine flues are surrounded by an upper conveying pipeline 2. The lower end of the upper conveying pipeline 2 is provided with a lower conveying pipeline 15. The bulk material discharged from the inside of the bulk material bin 5 of the sintering machine flue will be uniformly transported into the inside of the lower conveying pipeline 15. A converging cavity 13 is provided inside the lower conveying pipeline 15, and the bulk material entering the inside of the lower conveying pipeline 15 can enter the inside of the converging cavity 13; wherein, as Figure 3 and Figure 4As shown in the figure, a dust discharge valve 7 for restricting the discharge is provided on the side of the lower end of the bulk material bin 5 of the sintering machine's large flue facing the upper conveying pipeline 2. An inlet 8 is provided at the lower end of the dust discharge valve 7. The dust discharge valve 7 is an electric double-layer dust discharge valve to reduce the interference between the lower conveying pipeline 15 and the bulk material bin 5 of the sintering machine's large flue. The dust discharge valve 7 is divided into upper and lower layers, and valves are independently provided for the two layers of the dust discharge valve 7. After the upper valve of the dust discharge valve 7 is opened, the bulk materials inside the bulk material bin 5 of the sintering machine's large flue will enter the cavity of the dust discharge valve 7. After a certain amount of bulk materials are discharged, the upper valve of the dust discharge valve 7 is closed, and the valve of the lower layer of the dust discharge valve 7 is opened to discharge the internal bulk materials from the lower end of the dust discharge valve 7;

[0029] Specifically, the materials of the upper conveying pipeline 2 and the lower conveying pipeline 15 are both wear-resistant steel. In addition, the inlet 8 and the converging cavity 13 are hermetically connected through a connecting pipe 9. A flow cavity 14 is provided through the inside of the connecting pipe 9. The bulk materials discharged from the inlet 8 at the lower end of the dust discharge valve 7 will pass through the inside of the flow cavity 14 and finally converge inside the lower conveying pipeline 15.

[0030] In order to push the bulk materials converged inside the lower conveying pipeline 15 and discharge them uniformly, a movable track 11 is recessed along the inside of the upper conveying pipeline 2. A chain 6 is provided in the middle of the movable track 11 inside the upper conveying pipeline 2 facing the upper end of the converging cavity 13. The overall track of the chain 6 overlaps with the tracks of the movable track 11 and the upper conveying pipeline 2. The chain 6 forms a loop at the position of the movable track 11 inside the upper conveying pipeline 2, and the transmission of the chain 6 can slide within the movable track 11; among them, a plurality of pushing disks 12 are evenly distributed along the track of the chain 6 at the lower end of the chain 6, and the pushing disks 12 are located inside the converging cavity 13. After the chain 6 is pushed, it can move along the movable track 11. During the movement, it will pull the pushing disks 12 to move inside the converging cavity 13, and the movement of the pushing disks 12 will push the bulk materials collected inside the converging cavity 13, facilitating uniform discharge;

[0031] In addition, as Figure 5 and Figure 6 shown, the chain 6 is stuck between the upper conveying pipeline 2 and the lower conveying pipeline 15. A transmission gear 10 is provided on one side inside the chain 6, and the outside of the transmission gear 10 is meshed and connected with the outside of the chain 6. Through the rotation of the transmission gear 10 of the chain 6 and the restriction of the chain 6 by the upper conveying pipeline 2 and the lower conveying pipeline 15, the chain 6 can drive the pushing disks 12 to continuously transmit along the converging cavity 13 inside the lower conveying pipeline 15;

[0032] For the convenience of transmitting the transmission gear 10, a head steering mechanism 1 is provided at the upper end outside the transmission gear 10, and the head steering mechanism 1 is fixedly welded to the outer wall of the upper feeding pipeline 2. Through the head steering mechanism 1, one side of both the upper feeding pipeline 2 and the lower feeding pipeline 15 can be fixedly welded. Through the head steering mechanism 1, the upper feeding pipeline 2 and the lower feeding pipeline 15 can be connected and supported, facilitating the erection and use of the entire structure. Among them, a driving motor 3 is provided at the upper end of the head steering mechanism 1. The output shaft of the driving motor 3 passes through the head steering mechanism 1 and is fixedly welded to the transmission gear 10. Through the output of the driving motor 3, the transmission gear 10 can be driven to rotate, and the chain 6 driven by the transmission gear 10 can be driven to transmit within the movable rail 11:

[0033] In order to facilitate the unified discharge of the bulk materials inside the lower feeding pipeline 15, a discharge pipeline 4 is provided on the lower feeding pipeline 15 at the lower end position of the head steering mechanism 1, and the discharge pipeline 4 is hermetically connected to the lower feeding pipeline 15. After the push plate 12 is transmitted within the converging cavity 13, the push plate 12 will push the bulk materials close to the discharge pipeline 4 and discharge them from the position of the discharge pipeline 4. Among them, the head steering mechanism 1, the driving motor 3, the discharge pipeline 4, and the transmission gear 10 can be arranged according to the actual situation with high flexibility.

[0034] In order to further better explain and illustrate the above embodiments, when the present invention uses the sintering large flue gas bulk material conveying system to uniformly convey the bulk materials, a sintering large flue gas bulk material conveying method is also provided, including the following steps:

[0035] S1: Let the sintering large flue gas bulk materials fall into the sintering machine large flue gas bulk material bin 5. Open the valve at the upper end of the ash discharge valve 7 and close the valve at the lower end of the ash discharge valve 7. The bulk materials enter the inside of the ash discharge valve 7;

[0036] S2: Close the valve at the upper end of the ash discharge valve 7 and open the valve at the lower end of the ash discharge valve 7, so that the bulk materials enter the flow cavity 14 inside the connecting pipe 9 from the lower end feed port 8 of the ash discharge valve 7. The bulk materials inside the flow cavity 14 finally fall into the converging cavity 13 inside the lower feeding pipeline 15 due to gravity;

[0037] S3: Start the driving motor 3. The output shaft of the driving motor 3 drives the transmission gear 10 to rotate. The rotation of the transmission gear 10 drives the chain 6 to move within the movable rail 11. The movement of the chain 6 will drive the push plate 12 to move at the position of the converging cavity 13 inside the lower feeding pipeline 15;

[0038] S4: The push plate 12 pushes the bulk materials collected inside the converging cavity 13, so that the bulk materials move towards the discharge pipeline 4. The bulk materials fall and are discharged after moving to the upper end of the discharge pipeline 4.

[0039] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0040] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A sintering large flue bulk material conveying system, comprising a plurality of sintering machine large flue bulk material bins (5) distributed laterally, wherein an upper material conveying pipeline (2) is arranged around the lower end of the sintering machine large flue bulk material bin (5), characterized in that: A lower material conveying pipeline (15) is arranged at the lower end of the upper material conveying pipeline (2); a discharge ash valve (7) for limiting material discharge is arranged on a side of the lower end of the sintering machine large flue bulk bin (5) facing the upper material conveying pipeline (2); a feed port (8) is arranged at the lower end of the discharge ash valve (7); a movable rail (11) is arranged inside the upper material conveying pipeline (2) in a depression extending along the upper material conveying pipeline (2); a chain (6) is arranged inside the movable rail (11) in the middle of the upper end of the convergence chamber (13); the chain (6) is stuck between the upper material conveying pipeline (2) and the lower material conveying pipeline (15); a transmission gear (10) is arranged on one side inside the chain (6); the transmission gear (10) is meshed with the chain (6); a head steering mechanism (1) is arranged at the upper end of the outer portion of the transmission gear (10); the head steering mechanism (1) is welded and fixed to the outer wall of the upper material conveying pipeline (2).

2. A sintering large flue bulk material conveying system according to claim 1, characterized in that: The chain (6) forms a loop at the position of the movable rail (11) inside the upper material conveying pipeline (2).

3. A sintering large flue bulk material conveying system according to claim 1, characterized in that: A convergence chamber (13) is provided inside the lower material conveying pipeline (15).

4. A sintering large flue bulk material conveying system according to claim 1, characterized in that: The feed port (8) and the convergence chamber (13) are sealedly connected via a connecting pipe (9), and a flow chamber (14) is provided inside the connecting pipe (9).

5. The sintering large flue bulk material conveying system according to claim 2, characterized in that: The lower end of the chain (6) is evenly distributed with push disks (12) along the trajectory of the chain (6), and the push disks (12) are located inside the convergence cavity (13).

6. The sintering large flue bulk material conveying system according to claim 1, characterized in that: A drive motor (3) is provided at the upper end of the head steering mechanism (1), and an output shaft of the drive motor (3) passes through the head steering mechanism (1) and is welded and fixed to the transmission gear (10).

7. A sintering large flue bulk material conveying system according to claim 6, characterized in that: The lower material delivery pipeline (15) at the lower end of the head steering mechanism (1) is provided with a discharge pipeline (4), and the discharge pipeline (4) is sealedly connected to the lower material delivery pipeline (15).

8. A method for conveying bulk materials in a sintering flue, which is implemented based on the sintering flue bulk material conveying system according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: dropping the flue bulk material into the interior of the large flue bulk material bin (5) of the sintering machine, opening the valve at the upper end of the ash discharge valve (7), closing the valve at the lower end of the ash discharge valve (7), and allowing the bulk material to enter the interior of the ash discharge valve (7); S2: closing the valve at the upper end of the ash discharge valve (7) and opening the valve at the lower end of the ash discharge valve (7), so that the bulk material enters the flow cavity (14) inside the connecting pipe (9) from the feed port (8) at the lower end of the ash discharge valve (7), and the bulk material inside the flow cavity (14) falls into the convergence cavity (13) inside the lower conveying pipe (15) by gravity; S3: starting the drive motor (3), the output shaft of the drive motor (3) drives the transmission gear (10) to rotate, the rotation of the transmission gear (10) drives the chain (6) to move in the movable rail (11), and then drives the push plate (12) to move in the convergence chamber (13) inside the lower conveying pipe (15); S4: The push disk (12) pushes the bulk material collected in the converging chamber (13) so that the bulk material moves toward the discharge pipe (4). After moving to the upper end of the discharge pipe (4), the bulk material falls and is discharged.

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