Bulk material conveying system for large sintering flue

Abstract

The utility model discloses a bulk material conveying system for a large sintering flue, and belongs to the field of bulk material conveying of large sintering flue. The large sintering flue bulk material conveying system comprises a plurality of sintering machine large flue bulk material bins which are transversely distributed, upper material conveying pipelines are arranged at the lower ends of the sintering machine large flue bulk material bins in a surrounding mode, and lower material conveying pipelines are arranged at the lower ends of the upper material conveying pipelines. The large flue bulk material collecting device solves the problems that an existing large flue bulk material collecting device of the 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. 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] This utility model relates to the field of bulk material conveying in sintering flue gas, specifically a bulk material conveying system for sintering flue gas. Background Technology

[0002] Iron ore sintering is an important production process in the modern steel industry, providing essential qualified raw materials for blast furnace ironmaking. Modern sintering production is a vacuum sintering process, in which iron ore powder, solvent, fuel and return ore are mixed in a certain proportion, with an appropriate amount of water added. After mixing and pelletizing, the mixture is spread on the trolley of a belt sintering machine and ignited under a certain negative pressure. The entire sintering process is carried out from top to bottom under negative pressure. Because the sintering machine is a negative pressure sintering process, a small amount of fine material will enter the flue and gradually accumulate. Therefore, it needs to be cleaned in time, otherwise it will block the flue and affect production.

[0003] Currently, the bulk material collection device for the sintering machine's main flue is a conveyor belt. In the case of a dual flue, the bulk material in the flue enters the bulk material silo, and the bulk material is discharged to the conveyor belt below through a double-layer ash discharge valve at regular intervals, and finally collected on the finished product conveyor belt. This process requires the installation of three bulk material conveyor belts. With the increasing environmental protection requirements, all three conveyor belts need to be fully sealed for dust removal, which requires the installation of a large number of dust removal pipelines and an increase in the processing capacity of the dust collectors. The system is relatively complex, requires a large layout space, and has a high investment cost. Utility Model Content

[0004] The purpose of this utility model is to provide a bulk material conveying system for sintering flue gas. By opening the ash discharge valve, a certain amount of bulk material is sent into the lower conveying pipe driven by a chain. After the bulk material is gathered in the gathering cavity inside the lower conveying pipe, the chain, driven by the transmission gear, drives the push plate to push the bulk material, so that the bulk material approaches the discharge pipe and falls from the discharge pipe position, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sintering machine flue bulk material conveying system, comprising several horizontally distributed sintering machine flue bulk material bins, an upper conveying pipe arranged around the lower end of each sintering machine flue bulk material bin, a lower conveying pipe arranged at the lower end of the upper conveying pipe, an ash discharge valve for restricting material discharge arranged on the side of the lower end of each sintering machine flue bulk material bin facing the upper conveying pipe, an inlet arranged at the lower end of the ash discharge valve, a movable rail arranged recessed along the upper conveying pipe inside the upper conveying pipe, and a chain arranged in the middle of the movable rail facing the upper end of the converging cavity.

[0006] Preferably, the chain forms a loop at the movable track position inside the upper conveying pipe.

[0007] Preferably, the lower conveying pipe has a converging cavity inside.

[0008] Preferably, the feed inlet and the converging cavity are sealed together by a connecting pipe, and a flow cavity is provided through the inside of the connecting pipe.

[0009] Preferably, the lower end of the chain has push disks evenly distributed along the chain's trajectory, and the push disks are located inside the converging cavity.

[0010] Preferably, the chain is positioned between the upper and lower conveying pipes, and a transmission gear is provided on one side inside the chain, with the outer side of the transmission gear meshing with the outer side of the chain.

[0011] Preferably, the upper end of the transmission gear is provided with a head steering mechanism, and the head steering mechanism is welded and fixed to the outer wall of the upper conveying pipe.

[0012] Preferably, a drive motor is provided at the upper end of the head steering mechanism, and the output shaft of the drive motor passes through the head steering mechanism and is welded and fixed to the transmission gear.

[0013] Preferably, the lower conveying pipe at the lower end of the head steering mechanism is provided with a discharge pipe, and the discharge pipe is sealed to the lower conveying pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This utility model relates to a bulk material hopper in a sintering machine's main flue. After the ash discharge valve is opened, the bulk material flows into the flow chamber inside the connecting pipe through the inlet. The bulk material then directly converges from the flow chamber and enters the convergence chamber inside the lower conveying pipe. The entire process is dust-free and leak-free, eliminating the need for additional dust removal devices and reducing equipment investment costs. Furthermore, multiple bulk material hoppers in the sintering machine's main flue are connected to the lower conveying pipe by corresponding connecting pipes, and the separate pipe connections enhance the convenience of maintenance. Attached Figure Description

[0016] Figure 1 This is a front view of the conveying system of this utility model;

[0017] Figure 2 This is a top view of the conveying system of this utility model;

[0018] Figure 3 This is a side view showing the positional relationship of the bulk material bin in the main flue of the sintering machine according to this utility model;

[0019] Figure 4 This is a schematic diagram of the external structure of the upper conveying pipe of this utility model;

[0020] Figure 5 This is a cross-sectional view of the chain drive structure of this utility model;

[0021] Figure 6 For the present utility model Figure 5 A partial structural plan view.

[0022] In the diagram: 1. Head steering mechanism; 2. Upper conveying pipe; 3. Drive motor; 4. Discharge pipe; 5. Sintering machine main flue bulk material bin; 6. Chain; 7. Ash discharge valve; 8. Feed inlet; 9. Connecting pipe; 10. Transmission gear; 11. Movable rail; 12. Push plate; 13. Converging chamber; 14. Flow chamber; 15. Lower conveying pipe. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments.

[0024] like Figure 1 and Figure 2 As shown, a sintering flue bulk material conveying system of this embodiment includes several sintering machine flue bulk material bins 5 arranged laterally. An upper conveying pipe 2 is arranged around the lower end of the several sintering machine flue bulk material bins 5. A lower conveying pipe 15 is arranged at the lower end of the upper conveying pipe 2. The bulk material discharged from the sintering machine flue bulk material bins 5 will be uniformly transferred to the lower conveying pipe 15. A collecting cavity 13 is arranged inside the lower conveying pipe 15. The bulk material can enter the collecting cavity 13 after entering the lower conveying pipe 15.

[0025] Among them, such as Figure 3 and Figure 4 As shown, the lower end of the bulk material bin 5 of the sintering machine's main flue is equipped with a discharge valve 7 that restricts material discharge on the side facing the upper conveying pipe 2. The lower end of the discharge valve 7 is equipped with a feed inlet 8. The discharge valve 7 is an electric double-layer discharge valve to reduce the interference between the lower conveying pipe 15 and the bulk material bin 5 of the sintering machine's main flue. The discharge valve 7 is divided into upper and lower layers, and the two layers of discharge valve 7 are independently equipped with valves. After the upper valve of the discharge valve 7 is opened, the bulk material inside the bulk material bin 5 of the sintering machine's main flue will enter the cavity of the discharge valve 7. After a certain amount of bulk material is discharged, the upper valve of the discharge valve 7 is closed, and the lower valve of the discharge valve 7 is opened to discharge the bulk material from the lower end of the discharge valve 7.

[0026] Both the upper conveying pipe 2 and the lower conveying pipe 15 are made of wear-resistant steel.

[0027] In addition, the feed inlet 8 and the collection chamber 13 are sealed together by a connecting pipe 9. A flow chamber 14 is provided inside the connecting pipe 9. The loose material discharged from the feed inlet 8 at the lower end of the ash discharge valve 7 will pass through the flow chamber 14 and finally converge in the lower conveying pipe 15.

[0028] In order to push and discharge the bulk material gathered inside the lower conveying pipe 15, a movable rail 11 is provided inside the upper conveying pipe 2 along the recess of the upper conveying pipe 2. A chain 6 is provided in the middle of the upper end of the converging cavity 13 inside the movable rail 11. The overall trajectory of the chain 6 overlaps with the trajectory of the movable rail 11 and the upper conveying pipe 2. The chain 6 forms a loop at the position of the movable rail 11 inside the upper conveying pipe 2. The transmission of the chain 6 can slide within the movable rail 11.

[0029] Among them, the lower end of the chain 6 is evenly distributed with push disks 12 along the track of the chain 6, and the push disks 12 are located inside the collection cavity 13. After the chain 6 is pushed, it can move along the movable track 11. During the movement, it will pull the push disks 12 to move in the collection cavity 13. The movement of the push disks 12 will push the loose material collected inside the collection cavity 13, which is convenient for unified discharge.

[0030] In addition, such as Figure 5 and Figure 6 As shown, the chain 6 is locked between the upper conveying pipe 2 and the lower conveying pipe 15. A transmission gear 10 is provided on one side inside the chain 6, and the outside of the transmission gear 10 is meshed with the outside of the chain 6. By rotating the transmission gear 10 of the chain 6, combined with the restriction of the chain 6 by the conveying pipe 2 and the lower conveying pipe 15, the chain 6 can drive the pusher 12 to continuously transmit along the converging cavity 13 inside the lower conveying pipe 15.

[0031] In order to facilitate the transmission of the transmission gear 10, a head steering mechanism 1 is provided at the upper end of the transmission gear 10. The head steering mechanism 1 is welded and fixed to the outer wall of the upper conveying pipe 2. The head steering mechanism 1 can weld and fix one side of both the upper conveying pipe 2 and the lower conveying pipe 15. The head steering mechanism 1 can connect and support the upper conveying pipe 2 and the lower conveying pipe 15, which facilitates the erection and use of the entire structure.

[0032] The head steering mechanism 1 is equipped with a drive motor 3 at its upper end. The output shaft of the drive motor 3 passes through the head steering mechanism 1 and is welded and fixed to the transmission gear 10. The output of the drive motor 3 can drive the transmission gear 10 to rotate, which can drive the chain 6 driven by the transmission gear 10 to move within the movable rail 11 for transmission.

[0033] In order to facilitate the unified discharge of bulk materials inside the lower conveying pipe 15, the lower conveying pipe 15 at the lower end of the head steering mechanism 1 is provided with a discharge pipe 4, and the discharge pipe 4 is sealed to the lower conveying pipe 15. After being transmitted in the gathering cavity 13 by the push plate 12, the push plate 12 will push the bulk materials close to the discharge pipe 4 and discharge them from the position of the discharge pipe 4.

[0034] Among them, the head steering mechanism 1, drive motor 3, unloading pipe 4 and transmission gear 10 can be arranged according to actual conditions, with high flexibility.

[0035] Working principle: The bulk material is uniformly transported using the sintering flue bulk material conveying system. The sintering flue gas falls into the bulk material bin 5 of the sintering machine flue. The valve at the upper end of the ash discharge valve 7 is opened, and the valve at the lower end of the ash discharge valve 7 is closed, allowing the bulk material to enter the ash discharge valve 7. The valve at the upper end of the ash discharge valve 7 is closed, and the valve at the lower end of the ash discharge valve 7 is opened, allowing the bulk material to enter the flow chamber 14 inside the connecting pipe 9 from the feed inlet 8 at the lower end of the ash discharge valve 7. The bulk material inside the flow chamber 14 eventually falls due to gravity. The material enters the collecting cavity 13 inside the lower conveying pipe 15. The drive motor 3 is started. 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. The movement of the chain 6 will drive the push plate 12 to move in the collecting cavity 13 inside the lower conveying pipe 15. The push plate 12 will push the loose material collected in the collecting cavity 13, so that the loose material moves towards the discharge pipe 4. After moving to the upper end of the discharge pipe 4, the loose material falls down and is discharged.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A sintering machine flue bulk material conveying system, comprising a plurality of sintering machine flue bulk material silos (5) arranged laterally, wherein an upper conveying pipe (2) is arranged around the lower end of each sintering machine flue bulk material silo (5), characterized in that, The lower end of the upper conveying pipe (2) is provided with a lower conveying pipe (15). The lower end of the sintering machine flue bulk material bin (5) facing the upper conveying pipe (2) is provided with a discharge valve (7) to restrict material discharge. The lower end of the discharge valve (7) is provided with a feed inlet (8). The interior of the upper conveying pipe (2) is recessed along the upper conveying pipe (2) and a movable rail (11) is provided. The interior of the movable rail (11) is provided with a chain (6) facing the middle of the upper end of the converging cavity (13).

2. The sintering 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 conveying pipe (2).

3. The sintering flue bulk material conveying system according to claim 1, characterized in that, The lower conveying pipe (15) is provided with a converging cavity (13).

4. The sintering flue bulk material conveying system according to claim 1, characterized in that, The feed inlet (8) and the converging chamber (13) are sealed together by a connecting pipe (9), and a flow chamber (14) is provided inside the connecting pipe (9).

5. A sintering 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 converging cavity (13).

6. A sintering flue bulk material conveying system according to claim 5, characterized in that, The chain (6) is positioned between the upper conveying pipe (2) and the lower conveying pipe (15). A transmission gear (10) is provided on one side inside the chain (6), and the outside of the transmission gear (10) is meshed with the outside of the chain (6).

7. A sintering flue bulk material conveying system according to claim 6, characterized in that, The upper end of the transmission gear (10) is provided with a head steering mechanism (1), and the head steering mechanism (1) is welded and fixed to the outer wall of the upper conveying pipe (2).

8. A sintering flue bulk material conveying system according to claim 7, characterized in that, The head steering mechanism (1) is equipped with a drive motor (3) at its upper end. The output shaft of the drive motor (3) passes through the head steering mechanism (1) and is welded and fixed to the transmission gear (10).

9. A sintering flue bulk material conveying system according to claim 8, characterized in that, The lower conveying pipe (15) at the lower end of the head steering mechanism (1) is provided with a discharge pipe (4), and the discharge pipe (4) is sealed to the lower conveying pipe (15).

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