Annular discharge gate of large pellet silo

Abstract

The utility model provides an annular discharging gate of a large pellet silo, which aims at solving the technical problems that materials are stored at the bottom of the silo and the silo is unstable when the existing large pellet silo is used for discharging materials. The discharging gate comprises a silo wall, a silo bottom, a silo bottom gate plate, a lifting plate and a lifting assembly. The silo bottom comprises an upper conical bottom plate and a lower conical bottom plate, the top end of the upper conical bottom plate is fixedly connected with the bottom end of the silo wall, and the bottom end of the lower conical bottom plate is connected with the bottom end of the cylindrical silo bottom flashboard; the lifting plate comprises a vertical plate and a flat plate, the outer wall of the vertical plate is connected with the inner side of the bottom end of the upper conical bottom plate, the inner ring of the flat plate is fixedly connected with the bottom end of the vertical plate, and the lower surface of the flat plate is fixedly connected with the top end of the bin bottom flashboard. The two ends of the lifting assembly are connected with the upper conical bottom plate and the flat plate of the lifting plate correspondingly. According to the device, the advantages of high compressive strength and good fluidity of pellets are utilized, smooth discharging at the bottom of the silo is guaranteed, silo deviation is avoided, and the problems of dead material areas at the bottom of the silo are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pelletizing silo equipment technical field, especially relates to a large -scale pelletizing silo's annular unloading gate. BACKGROUND

[0002] Pellet as the indispensable high-quality furnace burden of blast furnace ironmaking and short process steelmaking, pellet belongs to round ball particle, and the particle size is between 8-16mm, in the pellet production process, due to its small angle of repose, the ground storage occupies large area, and the pellet particles are easy to be damaged and pulverized during the transportation. In order to reduce the problems such as material transportation, increased operation cost, increased unorganized particle emission and large occupation caused by ground storage of pellet, large silo storage, loading and unloading pellet technology is developed and applied. At present, a single seat storage capacity of 100,000 tons of large pellet silo has been successfully applied in China, and the particle emission is realized from unorganized emission to organized emission management.

[0003] Since the diameter of the silo is large, in order to successfully discharge the pellets in the silo, the prior art sets multiple discharge points at the bottom of the silo, for example, a silo with a diameter of 56m is provided with at least 30 discharge points. Although there are many discharge points, the pellets accumulated between the bottom circle and the two discharge points cannot be automatically discharged, forming a perennially accumulated "dead material area", which greatly reduces the utilization rate of the silo. At the same time, in order to ensure the stability of the silo and prevent the occurrence of silo deviation, the horizontal and vertical center lines of the silo are taken as the symmetry axes, and the two discharge points at the corresponding positions are required to work synchronously, which puts high requirements on the reliability of the discharge equipment and the real-time performance of the material level detection in the silo. SUMMARY

[0004] The utility model discloses a large -scale pelletizing silo's annular unloading gate for the technical problem of the storage of the bottom of the silo and the instability of the silo when the existing large -scale pelletizing silo discharges. The device takes advantage of the high compressive strength and good fluidity of the pellets to ensure smooth discharge of the silo bottom, avoid silo deviation and eliminate the "dead material area at the bottom of the silo".

[0005] A large -scale pelletizing silo's annular unloading gate, including silo wall, bottom, bottom gate, lifting plate and lifting assembly;

[0006] The bottom includes an upper conical bottom plate and a lower conical bottom plate, the upper conical bottom plate is a hollow inverted circular truncated cone, the top end of the upper conical bottom plate is fixedly connected with the bottom end of the silo wall, and the lower conical bottom plate is a circular cone, and the bottom end of the lower conical bottom plate is connected with the bottom end of the cylindrical bottom gate;The lifting plate includes a vertical plate and a flat plate, the vertical plate is cylindrical, the outer wall of the vertical plate is connected with the bottom end of the upper conical bottom plate, the flat plate is circular, the inner ring of the flat plate is fixedly connected with the bottom end of the vertical plate, and the lower surface of the flat plate is fixedly connected with the top end of the bottom gate;The two ends of the lifting assembly are connected with the upper conical bottom plate and the flat plate of the lifting plate respectively.

[0007] Further, the annular discharge gate of the large pellet cylinder silo, the lifting assembly is a plurality of hydraulic lifts evenly distributed on the inner ring of the lifting plate.

[0008] Further, the annular discharge gate of the large pellet cylinder silo, the inner diameter of the bottom gate is greater than the inner diameter of the inner ring of the lifting plate.

[0009] Further, the annular discharge gate of the large pellet cylinder silo, the lifting plate, the lifting plate, the lifting plate and the lifting plate are provided with a wear-resistant layer.

[0010] Further, the annular discharge gate of the large pellet cylinder silo, the bottom angle of the lower cone bottom plate is 22-25°, and the angle between the upper cone bottom plate and the horizontal is 22-25°.

[0011] Compared with the prior art, the advantages of the present application are:

[0012] 1、The annular discharge gate of the present application lifts the bottom gate as a whole through the lifting assembly, ensuring smooth discharge of the cylinder bottom, avoiding deviation of the cylinder and eliminating the problem of "dead material area at the bottom of the cylinder".

[0013] 2、The annular discharge gate of the present application can flexibly adjust the diameter, height and number of lifting assemblies of the cylinder according to the required storage capacity, and has the advantages of strong adaptability, environmental friendliness, uniform discharge, safety and stability. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 , the structure diagram of the discharge gate of the present application.

[0015] Among them, 1, large cylinder, 2, pellet, 3, lower cone bottom plate, 4, upper cone bottom plate, 5, lifting assembly, 6, flat plate, 7, bottom gate, 8, transport belt, 9, vertical plate. DETAILED DESCRIPTION

[0016] EMBODIMENT

[0017] An annular discharge gate of a large pellet cylinder silo, comprising a cylinder wall, a bottom, a bottom gate, a lifting plate and a lifting assembly;

[0018] The bottom of the silo comprises an upper conical bottom plate and a lower conical bottom plate, the upper conical bottom plate is a hollow inverted circular truncated cone, the top end of the upper conical bottom plate is fixedly connected with the bottom end of the silo wall, the lower conical bottom plate is a circular cone, the bottom end of the lower conical bottom plate is connected with the bottom end of the cylindrical bottom gate, the lifting plate comprises a vertical plate and a flat plate, the vertical plate is cylindrical, the outer wall of the vertical plate is connected with the inner side of the bottom end of the upper conical bottom plate, the flat plate is a circular ring, the inner ring of the flat plate is fixedly connected with the bottom end of the vertical plate, and the lower surface of the flat plate is fixedly connected with the top end of the bottom gate, the inner diameter of the bottom gate is larger than the inner diameter of the inner ring of the flat plate of the lifting plate, the lifting assembly is connected with the upper conical bottom plate and the flat plate of the lifting plate at two ends, the lifting assembly comprises a plurality of hydraulic lifts which are uniformly distributed around the flat plate of the lifting plate, and eight hydraulic lifts are adopted in the embodiment, and the bottom angle of the lower conical bottom plate is 22-25°, and the angle between the upper conical bottom plate and the horizontal plane is 22-25°.

[0019] The upper conical bottom plate, the lower conical bottom plate, the bottom gate and the vertical plate of the lifting plate are all provided with wear-resistant layers.

[0020] The annular discharge gate of the large-scale pellet silo is used as follows:

[0021] The finished pellet 2 has a particle size of 8-16 mm, is discharged into the silo through the top of the silo and is naturally stacked in the silo, when the silo is discharged, eight hydraulic lifts work synchronously, the lifting plate is lifted to a specified height, the bottom gate is lifted by the lifting plate, a gap is formed between the bottom gate and the lower conical bottom plate, the pellet is freely dropped into the conveying belt 8 through the gravity effect, the pellet on the lower conical bottom plate is continuously discharged to form a gap, the pellet on the upper conical bottom plate is continuously supplemented by the gravity effect, and finally the material surface in the silo is continuously and uniformly lowered to form continuous discharge of the pellet from the bottom.

[0022] When the pellet silo needs to stop discharging, eight hydraulic lifts work synchronously, the lifting plate is lowered to the original height, the bottom gate is lowered at the same time, and the bottom gate and the lower conical bottom plate are closed, and the discharging is completed.

[0023] The pellet has the characteristics of high compressive strength and good fluidity, so that the discharge of the bottom of the silo is smooth, deviation of the silo is avoided, and the problem of the dead material area of the bottom of the silo is solved. The diameter, height and number of the silo can be flexibly adjusted according to the required storage capacity, and the silo has the advantages of strong adaptability, environmental friendliness, uniform discharge, safety and stability.

Claims

1. A ring-shaped unloading gate for a large pellet silo, characterized in that, Includes silo walls, silo floor, silo floor gate, lifting platform, and lifting assembly; The silo bottom includes an upper conical bottom plate and a lower conical bottom plate. The upper conical bottom plate is a hollow inverted frustum shape, and its top end is fixedly connected to the bottom end of the silo wall. The lower conical bottom plate is conical, and its bottom end is connected to the bottom end of a cylindrical silo bottom gate. The lifting plate includes a vertical plate and a flat plate. The vertical plate is cylindrical, and its outer wall is connected to the inner side of the bottom end of the upper conical bottom plate. The flat plate is annular, and its inner ring is fixedly connected to the bottom end of the vertical plate. The lower surface of the flat plate is fixedly connected to the top end of the silo bottom gate. The two ends of the lifting assembly are respectively connected to the upper conical bottom plate and the flat plate of the lifting plate.

2. The annular unloading gate of the large pellet silo according to claim 1, characterized in that, The lifting assembly consists of several hydraulic lifts evenly distributed around the perimeter of the lifting plate.

3. The annular unloading gate of the large pellet silo according to claim 1, characterized in that, The inner diameter of the bottom gate is larger than the inner diameter of the inner ring of the lifting plate.

4. The annular unloading gate of the large pellet silo according to claim 1, characterized in that, The upper conical bottom plate, lower conical bottom plate, bottom gate plate, and lifting plate all have wear-resistant layers on their uprights.

5. The annular unloading gate of the large pellet silo according to claim 1, characterized in that, The bottom angle of the lower conical base plate is 22~25°, and the angle between the upper conical base plate and the horizontal is 22~25°.

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