Uniform discharging device for large mine silo

Abstract

The application discloses a large mine silo uniform discharging device, which comprises a silo, wherein the silo comprises a silo bottom and a silo shell which are connected together; the silo bottom comprises a first conical bottom plate and a second conical bottom plate; the first conical bottom plate is arranged on the outer side of the second conical bottom plate; the outer side of the first conical bottom plate is connected with the silo shell, and the inner side is correspondingly arranged with the edge of the second conical bottom plate; the first conical bottom plate and the second conical bottom plate are provided with a ring-shaped discharging port arranged at the close position; the side of the first conical bottom plate connected with the silo shell is higher than the side close to the second conical bottom plate; the height of the second conical bottom plate gradually decreases from the central position to the edge position; and the height of the edge position of the second conical bottom plate is lower than the height of the first conical bottom plate. The large mine silo uniform discharging device improves the uniformity of the discharging of the pellet in the silo, guarantees the stability of the silo and avoids the occurrence of the partial silo.

Description

Technical Field

[0001] This invention relates to the field of pellet feeding technology, and in particular to a large-scale mining silo uniform feeding device. Background Technology

[0002] Iron pellets are an indispensable raw material for blast furnace ironmaking and short-process steelmaking, and can increase the proportion of iron pellets fed into blast furnaces and promote short-process steelmaking. In the pellet industry, in order to reduce the problems caused by ground storage of iron pellets, such as material handling, increased operating costs, increased fugitive pollutant emissions, and large land occupation, large silo storage and loading / unloading technologies for iron pellets have been developed and applied.

[0003] Currently, domestically, pellet silos with a single storage capacity of up to 100,000 tons have been successfully applied. Compared with ground-level storage, these silos not only occupy less land but also enable organized discharge management. Due to the large diameter of the silos, existing technologies set up many discharge points at the bottom of the silos to facilitate the discharge of pellets. For example, a silo with a diameter of 56m has at least 30 discharge points at the bottom. Although there are many discharge points, the pellets accumulated around the bottom of the silo and between two discharge points cannot be discharged automatically, forming a "dead material zone" that accumulates year-round, greatly reducing the utilization rate of the silos. At the same time, to ensure the stability of the silos and prevent uneven storage, the two discharge points at corresponding positions must work synchronously, with the horizontal and vertical center lines of the silo as the axes of symmetry. This places high demands on the reliability of the discharge equipment and the real-time detection of material levels within the silos. Furthermore, the conveyor belts transporting pellets at the bottom of the silos must also be stable and reliable.

[0004] Besides storing ore pellets, silos are widely used in the country. Summary of the Invention

[0005] In view of this, the present invention provides a uniform feeding device for large mining silos, which improves the uniformity of feeding pellets in the silo, ensures the stability of the silo, and avoids the occurrence of silo imbalance.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A large mining silo uniform feeding device includes a silo, the silo including a silo bottom and a silo shell connected together, the silo bottom including a first conical bottom plate and a second conical bottom plate, the first conical bottom plate being arranged around the outside of the second conical bottom plate, the outside of the first conical bottom plate being connected to the silo shell, and the inside of the first conical bottom plate being arranged corresponding to the edge of the second conical bottom plate, and an annular discharge port being arranged at a position close to the first conical bottom plate and the second conical bottom plate;

[0008] The side of the first conical bottom plate that connects to the hopper shell is higher than the side of the first conical bottom plate that is closer to it. The height of the second conical bottom plate gradually decreases from its center position to its edge position, and the height of the edge position of the second conical bottom plate is lower than the height of the first conical bottom plate.

[0009] Optionally, the angle between the first conical base plate and the horizontal plane is 23-25°, and the angle between the second conical base plate and the horizontal plane is 23-25°.

[0010] The second conical bottom plate is fixedly installed at the center of the bottom of the bin.

[0011] Optionally, an annular discharge gate is provided between the first conical bottom plate and the second conical bottom plate. One end of the annular discharge gate is fixedly connected to the first conical bottom plate, and the other end contacts the edge of the second conical bottom plate.

[0012] The annular unloading gate is attached to the first conical bottom plate by a first lifting device. When the first lifting device is at its lowest position, the annular unloading gate contacts the edge of the second conical bottom plate. After the first lifting device rises a set distance, the unloading port is formed between the annular unloading gate and the edge of the second conical bottom plate.

[0013] Optionally, an annular material trough is provided at the position corresponding to the lower end of the discharge port. The annular material trough is a trough with a sealed bottom and an open top, and the opening of the annular material trough is provided corresponding to the discharge port.

[0014] The annular trough is fixedly connected to the annular belt conveyor, and the annular trough is used to transport materials to the discharge chute connected to the support platform.

[0015] Optionally, the bottom of the silo and the annular belt conveyor are fixedly disposed on the upper surface of the support platform, and the discharge chute is disposed on the lower surface of the support platform;

[0016] The top end of the discharge chute is set to correspond to the discharge opening on the support platform, and the bottom end is inserted into the guide chute of the first belt conveyor.

[0017] The material discharge opening is located at the lower end of the annular material trough.

[0018] Optionally, the support platform is provided with a baffle plate for blocking material. The baffle plate is raised and lowered at the top of the groove opening of the annular material trough by a second lifting device. The baffle plate is arranged corresponding to the cross-section of the groove cavity of the annular material trough. The baffle plate is arranged along the cross-sectional direction of the annular material trough and is located at the material discharge opening position.

[0019] In the first state, the baffle plate descends and inserts into the cavity of the annular material trough;

[0020] In the second state, the baffle plate is lifted and exits the cavity of the annular material trough.

[0021] Optionally, an annular cover is provided on the annular material trough, with the bottom end of the annular cover covering the annular material trough and the top end fitted onto the upper part of the discharge port, and the discharge port is located in the cavity formed by the annular material trough and the annular cover.

[0022] Optionally, the silo shell includes silo walls and silo roof connected together, and a feed inlet is provided on the silo roof;

[0023] A level gauge is installed on the surface of the silo top near the silo bottom, and the level gauge is communicatively connected to the controller; a second belt conveyor is installed on the top of the silo, and an unloading vehicle for feeding material into the silo is installed on the second belt conveyor.

[0024] Optionally, at least one settlement observation point is provided on the warehouse wall, and a settlement observation device is provided at the settlement observation point.

[0025] Optionally, wear-resistant plates are fixedly provided on the surfaces of the first and second conical bottom plates near the inner cavity of the silo, and the wear-resistant plates are cast stone plates;

[0026] Both the first and second conical bottom plates are fixedly mounted on the support platform by a support structure, and the hopper shell is fixedly and sealed to the edge of the first conical bottom plate;

[0027] The first and second cone-shaped bottom plates are made of concrete, and the silo walls are made of concrete or steel.

[0028] As can be seen from the above technical solution, the large-scale mining silo uniform feeding device provided by the present invention includes a first conical bottom plate and a second conical bottom plate at the bottom of the silo. The first conical bottom plate is arranged around the outside of the second conical bottom plate, that is, the bottom of the silo is set as a conical surface, thereby avoiding the formation of a dead material zone at the bottom of the silo and facilitating the automatic falling and discharge of pellets. The annular discharge port set between the first and second conical bottom plates ensures uniform feeding of pellets and avoids the accumulation of ore between the two discharge ports in the prior art. By setting the first conical bottom plate as a conical structure with a higher outer surface and a lower inner surface, it is convenient to guide the ore falling onto the first conical bottom plate to the discharge port. The second conical bottom plate is set with a gradually decreasing height from its center to its edge, which facilitates the guidance of the ore on the second conical bottom plate to the discharge port. The large-scale mining silo uniform feeding device of the present invention adopts the above-mentioned structural setting at the bottom of the silo, which improves the uniformity of pellet feeding in the silo, ensures the stability of the silo, avoids silo imbalance, and eliminates the dead material zone at the bottom of the silo. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A schematic diagram of the structure of the large mining silo uniform feeding device provided in an embodiment of the present invention from one angle;

[0031] Figure 2 This is a structural schematic diagram of the large mining silo uniform feeding device provided in an embodiment of the present invention from another angle.

[0032] Figure 3 This is a structural schematic diagram of one angle of the first conical base plate provided in an embodiment of the present invention;

[0033] Figure 4 This is a structural schematic diagram of the first conical base plate from another angle provided in an embodiment of the present invention;

[0034] Figure 5 A cross-sectional view of the first conical base plate provided in an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the structure of the second conical base plate provided in an embodiment of the present invention;

[0036] Figure 7 This is a cross-sectional view of the second conical base plate provided in an embodiment of the present invention;

[0037] Figure 8 This is a structural schematic diagram of an annular unloading gate provided in an embodiment of the present invention at one angle;

[0038] Figure 9 This is a schematic diagram of the annular unloading gate provided in an embodiment of the present invention from another angle;

[0039] Figure 10 A cross-sectional view of the annular unloading gate provided in an embodiment of the present invention;

[0040] Figure 11 This is a schematic diagram of the structure of the annular cover provided in an embodiment of the present invention;

[0041] Figure 12 A cross-sectional view of the annular cover provided in an embodiment of the present invention;

[0042] Figure 13A schematic diagram of a state in which the first conical bottom plate, the second conical bottom plate, and the annular unloading gate are assembled according to an embodiment of the present invention;

[0043] Figure 14 A schematic diagram of another state of the first conical bottom plate, the second conical bottom plate, and the annular unloading gate provided in an embodiment of the present invention;

[0044] Figure 15 This is a cross-sectional view of a baffle plate extending into the cavity of an annular material trough to block material unloading, as provided in an embodiment of the present invention.

[0045] in:

[0046] 1. Unloading vehicle; 2. First cone base plate; 201. Conical surface; 202. Cylindrical surface; 3. Second cone base plate; 4. Annular unloading gate; 401. Connecting ring edge; 402. Stop; 5. Annular trough; 6. Annular belt conveyor; 7. Annular track; 8. Drive device; 9. Annular cover; 10. Discharge chute; 11. First belt conveyor; 12. Level gauge; 13. Settlement observation device; 14. Silo shell; 15. First lifting device; 16. Support platform; 1601. Discharge opening; 17. Second belt conveyor; 18. Discharge port; 19. Baffle plate. Detailed Implementation

[0047] This invention discloses a uniform feeding device for large mining silos, which improves the uniformity of feeding pellets into the silo, ensures the stability of the silo, and avoids the occurrence of silo imbalance.

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] See Figures 1 to 14The present invention discloses a large-scale mining silo uniform feeding device, comprising a silo, wherein the silo includes a silo bottom and a silo shell 14 connected together. The silo bottom includes a first conical bottom plate 2 and a second conical bottom plate 3. The first conical bottom plate 2 is arranged around the outside of the second conical bottom plate 3, and the outside of the first conical bottom plate 2 is connected to the silo shell 14. The inside of the first conical bottom plate 2 is correspondingly arranged with the edge of the second conical bottom plate 3. An annular discharge port 18 is provided at a position close to the first conical bottom plate 2 and the second conical bottom plate 3. The side of the first conical bottom plate 2 connected to the silo shell 14 is higher than the side close to the second conical bottom plate 3. The height of the second conical bottom plate 3 gradually decreases from its center position to its edge position. The second conical bottom plate 3 is located at the center position of the silo bottom, and the center position of the second conical bottom plate 3 coincides with the center position of the silo bottom. The height of the edge position of the second conical bottom plate 3 is lower than the height of the first conical bottom plate 2, that is, the height of the edge position of the second conical bottom plate 3 is lower than the height of the lowest position of the first conical bottom plate 2, thereby facilitating the flow of pellets to the opening position of the discharge port 18.

[0050] The large-scale mining silo uniform feeding device of the present invention includes a silo bottom comprising a first conical bottom plate 2 and a second conical bottom plate 3. The first conical bottom plate 2 is arranged around the outside of the second conical bottom plate 3, i.e., the silo bottom is set as a conical surface, thereby avoiding the formation of a dead material zone at the bottom of the silo and facilitating the automatic falling and discharge of pellets. A circular discharge port 18 is provided between the first conical bottom plate 2 and the second conical bottom plate 3, ensuring uniform feeding of pellets and avoiding the accumulation of ore between the two discharge ports as in the prior art. By setting the first conical bottom plate 2 as a conical structure with a higher outer surface and a lower inner surface, it is convenient to guide the ore falling onto the first conical bottom plate 2 to the discharge port 18. The second conical bottom plate 3 is set with a gradually decreasing height from its center to its edge, facilitating the guiding of the ore on the second conical bottom plate 3 to the discharge port 18. The bottom of the large mining silo uniform feeding device of the present invention adopts the above-described structure, which improves the uniformity of feeding pellets in the silo, ensures the stability of the silo, avoids silo deviation, and eliminates the dead material zone at the bottom of the silo.

[0051] To facilitate the free unloading of the pellets under their own weight, the first conical bottom plate 2 and the second conical bottom plate 3 are both at an angle of 23-25° to the horizontal plane. By setting the cone angles of the first and second conical bottom plates 2 and 3 to 23-25°, their cone angles are made consistent with the angle of repose of the pellets, facilitating the free unloading of the pellets under their own weight. The second conical bottom plate 3 is fixedly positioned at the center of the silo bottom, resulting in a more uniform flow of pellets from the second conical bottom plate 3 to the discharge port 18, which helps improve the stability of the silo.

[0052] Furthermore, an annular discharge gate 4 is provided between the first conical base plate 2 and the second conical base plate 3. One end of the annular discharge gate 4 is fixedly connected to the first conical base plate 2, and the other end contacts the edge of the second conical base plate 3. The annular discharge gate 4 is hung on the first conical base plate 2 through a first lifting device 15, and the annular discharge gate 4 is used to control the opening and closing of the discharge port 18. When the first lifting device 15 is in the lowest position, the annular discharge gate 4 contacts the edge of the second conical base plate 3. After the first lifting device 15 rises a set distance, a material drop gap is formed between the annular discharge gate 4 and the edge of the second conical base plate, i.e., the discharge port 18. The set distance here is determined by the actual structural conditions, i.e., the overlap length of the edges of the annular discharge gate 4 and the second conical base plate 3.

[0053] In one embodiment, reference is made to Figures 3 to 5 The first conical base plate 2 includes a conical surface portion 201 and a cylindrical surface portion 202, which are connected together or integrally formed. The cylindrical surface portion 202 is fixedly disposed at the bottom of the conical surface portion 201 near the second conical base plate 3. The cylindrical surface portion 202 is a hollow cylinder. (Refer to...) Figure 6 and Figure 7 The second conical bottom plate 3 is conical, and its apex coincides with the center of the silo bottom. The first conical bottom plate 2 and the second conical bottom plate 3 are fixedly mounted on the support platform 16. (Refer to...) Figures 8 to 10 The annular discharge gate 4 includes a connecting ring edge 401 and a stop portion 402. The stop portion 402 is an annular cylindrical wall. The connecting ring edge 401 and the stop portion 402 are connected together, or the two are integrally formed. Figure 13 and Figure 14 As shown, the first conical base plate 2 and the second conical base plate 3 are fixedly mounted on the support platform 16. A stop portion 402 is sleeved on the outer side of the second conical base plate 3 and the cylindrical portion 202, with the inner side of the stop portion 402 contacting the edge of the second conical base plate 3 and the outer side of the cylindrical portion 202. A connecting ring 401 is hooked onto the conical portion 201 of the first conical base plate 2 via a first lifting device 15. Specifically, the first lifting device 15 is a hydraulic cylinder, which controls the lifting height of the annular unloading gate 4, thereby creating a gap between the unloading gate 4 and the second conical base plate 3. This gap is the unloading port 18. The pellets are freely discharged from the unloading port 18 by their own gravity. The size of the gap in the unloading port 18 is determined by the amount of material discharged; the greater the required discharge amount, the greater the lifting height.

[0054] To facilitate the transport of the unloaded pellets, an annular trough 5 is provided at the lower end of the discharge port 18, such as... Figure 1 and Figure 2As shown. The annular trough 5 is a trough with a sealed bottom and an open top. The opening of the annular trough 5 corresponds to the discharge port 18, so that the material falling from the discharge port 18 can fall into the annular trough 5. The annular trough 5 is fixedly connected to the annular belt conveyor 6. Driven by the annular belt conveyor 6, the annular trough 5 transports the pellets to the discharge chute 10 connected to the support platform 16. The discharge chute 10 is fixedly set on the lower surface of the support platform 16. The top of the discharge chute 10 corresponds to the discharge opening 1601 on the support platform 16, and the bottom is inserted into the guide chute of the first belt conveyor 11 to guide the pellets onto the first belt conveyor 11. It can be understood that the discharge opening 1601 is set at the lower end of the annular trough 5 so that the pellets falling from the annular trough 5 can fall into the discharge chute 10 through the discharge opening 1601.

[0055] To facilitate unloading, a baffle plate 19 is provided on the support platform 16 for blocking material. The baffle plate 19 is raised and lowered at the top of the opening of the annular material trough 5 via a second lifting device. The baffle plate 19 is configured to correspond to the cross-section of the cavity of the annular material trough 5. Figure 15 As shown, the width of the baffle plate 19 is set along the width of the cavity of the annular material trough 5. The width of the baffle plate 19 is slightly smaller than the width of the cavity of the annular material trough 5. When the baffle plate 19 descends to its lowest position, this position is the unloading position. The bottom end of the baffle plate 19 does not contact the bottom surface of the annular material trough 5 to avoid affecting the movement of the annular material trough 5 with the annular belt conveyor 6 when the baffle plate 19 blocks the material. The second lifting device is a hydraulic cylinder. The annular belt conveyor 6 is installed on the annular track 7, which is fixed on the support platform 16. The annular belt conveyor 6 moves under the drive of the drive device 8, which is a motor and is fixedly installed on the support platform 16. It can be understood that the baffle plate 19 is set at the unloading opening 1601. Specifically, the baffle plate 19 is suspended above the center position of the unloading opening 1601. In the first state, the baffle plate 19 descends and inserts into the cavity of the annular material trough 5, which is the unloading position. In the second state, the baffle plate 19 is lifted and exits the cavity of the annular material trough 5. This position is not the unloading position.

[0056] To prevent dust generation during material discharge, an annular cover 9 is provided on the annular trough 5. The bottom end of the annular cover 9 covers the annular trough 5 and is slidably connected to the top end of the annular trough 5 to prevent the annular cover 9 from affecting the movement of the annular trough 5. The top end of the annular cover 9 is fitted onto the outer side of the stop portion 402 of the annular discharge gate 4. The discharge port 18 is located in the cavity formed by the annular trough 5 and the annular cover 9. To prevent the annular cover 9 from affecting the lifting and lowering of the baffle plate 19, the annular cover 9 is provided with an opening for the baffle plate 19 to pass through. A cover plate can be provided at the opening position to close the opening. When the baffle plate 19 needs to pass through, the cover plate can be opened.

[0057] Specifically, the silo shell 14 includes silo walls and a silo roof connected together, with a feed inlet on the silo roof. A level gauge 12 is installed on the surface of the silo roof near the silo bottom, and the level gauge 12 is communicatively connected to a controller. A second belt conveyor 17 is installed on the top of the silo, and a discharge car 1 for feeding material into the silo is installed on the second belt conveyor 17. The second belt conveyor 17 is positioned corresponding to the feed inlet. The level gauge 12 is used to detect the level of the pellets in the silo. To monitor the settlement of the silo, at least one settlement observation point is installed on the silo wall, and each settlement observation point is equipped with a settlement observation device 13. The settlement observation device 13 is a commonly used tank settlement monitoring device in the prior art, which will not be described in detail here.

[0058] To improve wear resistance, wear-resistant plates, which are cast stone plates, are fixedly installed on the surfaces of the first conical bottom plate 2 and the second conical bottom plate 3 near the inner cavity of the silo. The wear-resistant plates are fixedly installed on the surfaces of the first conical bottom plate 2 and the second conical bottom plate 3. Both the first conical bottom plate 2 and the second conical bottom plate 3 are fixedly installed on the support platform 16 via a support structure, and the silo shell 14 is fixedly and sealingly connected to the edge of the first conical bottom plate 2.

[0059] In one embodiment, the first conical bottom plate 2 and the second conical bottom plate 3 are concrete plates, the walls of the silo shell 14 are concrete plates or steel plates, and the top of the silo is a steel plate.

[0060] The diameter of the silos in the large mining silo uniform feeding device of the present invention is between 10 and 60 m, and the diameter and the height of the straight section are determined according to the required storage capacity of a single silo. After the volume of a single silo is determined, if the total storage capacity is still relatively large, the number of silos can be increased according to storage needs and the available land area, and they can be arranged in parallel. The top of the silo is fed by a mobile unloading car 1 on the second belt conveyor 17.

[0061] The working process of the large-scale mining silo uniform feeding device of the present invention is as follows: Finished pellets with a particle size between 8 and 16 mm are unloaded into the silo via the unloading car 1 on the second belt conveyor 17 at the top of the silo. The pellets unloaded from the top of the silo fall onto the first conical bottom plate 2 and the second conical bottom plate 3. As the second belt conveyor 17 continuously unloads, feeding in the silo stops when the level gauge 12 shows a high level, or the bottom unloading and top feeding work simultaneously. When the silo needs to unload, the annular belt conveyor 6 and the first belt conveyor 11 are started first. The controller controls the first lifting device 15 to lift and open the annular unloading gate 4. Utilizing the good fluidity of the pellets, the pellets fall freely from the second conical bottom plate 3 into the annular trough 5, and the pellets on the first conical bottom plate 2 fall freely onto the second conical bottom plate 3. As unloading continues, the material level in the silo decreases, and the top of the silo is continuously replenished by the second belt conveyor 17 to achieve continuous unloading. An annular trough 5 is installed on an annular belt conveyor 6. Driven by the drive device 8, the annular belt conveyor 6 operates on the annular track 7, and the pellets falling into the annular trough 5 move accordingly. An annular cover 9 is used to seal the dust generated when the pellets fall freely into the annular trough 5. The annular cover 9 is connected to the external dust removal facility by a pipe. During unloading, a negative pressure is formed to prevent dust from overflowing and to ensure a good working environment. The discharge chute 10 is installed below the support platform 16 of the annular track 7. Two or four chutes can be set, and the specific number can be set by those skilled in the art according to actual needs. Under the obstruction of the baffle plate 19, the pellets in the annular trough 5 overflow through the trough opening at the top of the annular trough 5 and fall onto the corresponding discharge chute 10 through the discharge opening 1601. The pellets on the discharge chute 10 fall freely into the first belt conveyor 11. The pellets that fall into the first belt conveyor 11 are transported to the next process. When the pellets are used as furnace feed, they can go to the blast furnace or be directly reduced. When the pellets are sold as commodities, they can go to the loading station or the dock.

[0062] In the description of this solution, it should be understood that the terms "upper", "lower", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this solution.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this solution, "multiple" means two or more, unless otherwise explicitly specified.

[0064] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0065] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A large-scale mining silo uniform feeding device, comprising a silo, characterized in that, The silo includes a silo bottom and a silo shell connected together. The silo bottom includes a first conical bottom plate and a second conical bottom plate. The first conical bottom plate is arranged around the outside of the second conical bottom plate. The outside of the first conical bottom plate is connected to the silo shell, and the inside of the first conical bottom plate is arranged corresponding to the edge of the second conical bottom plate. A ring-shaped discharge port is provided at a position close to the first conical bottom plate and the second conical bottom plate. The side of the first conical bottom plate that connects to the hopper shell is higher than the side of the first conical bottom plate that is closer to the second conical bottom plate. The height of the second conical bottom plate gradually decreases from its center position to its edge position, and the height of the edge position of the second conical bottom plate is lower than the height of the first conical bottom plate. The angle between the first conical base plate and the horizontal plane is 23-25°; An annular unloading gate is provided between the first conical bottom plate and the second conical bottom plate. One end of the annular unloading gate is connected to the first conical bottom plate, and the other end is in contact with the edge of the second conical bottom plate. The annular unloading gate is hung on the first conical bottom plate by the first lifting device. When the first lifting device is at its lowest position, the annular unloading gate contacts the edge of the second conical bottom plate. After the first lifting device rises a set distance, the unloading port is formed between the annular unloading gate and the edge of the second conical bottom plate. An annular material trough is provided at the lower end of the discharge port. The annular material trough is a trough with a sealed bottom and an open top. The opening of the annular material trough is provided corresponding to the discharge port. The annular trough is fixedly connected to the annular belt conveyor, and the annular trough is used to convey materials to the discharge chute connected to the support platform; The bottom of the silo and the annular belt conveyor are fixedly installed on the upper surface of the support platform, and the discharge chute is installed on the lower surface of the support platform. The top end of the discharge chute is set to correspond to the discharge opening on the support platform, and the bottom end is inserted into the guide chute of the first belt conveyor. The material discharge opening is located at the lower end of the annular material trough; The support platform is provided with a baffle plate for blocking material. The baffle plate is raised and lowered at the top of the groove opening of the annular material trough by a second lifting device. The baffle plate is arranged corresponding to the cross-section of the groove cavity of the annular material trough. The baffle plate is arranged along the cross-sectional direction of the annular material trough and is located at the material discharge opening. In the first state, the baffle plate descends and inserts into the cavity of the annular material trough; In the second state, the baffle plate is lifted and exits the cavity of the annular material trough.

2. The large-scale mining silo uniform feeding device according to claim 1, characterized in that, The angle between the second conical base plate and the horizontal plane is 23-25°; The second conical bottom plate is fixedly installed at the center of the bottom of the bin.

3. The large-scale mining silo uniform feeding device according to claim 1, characterized in that, The annular material trough is covered by an annular cover, the bottom end of which covers the annular material trough and the top end of which is fitted onto the upper part of the discharge port. The discharge port is located in the cavity formed by the annular material trough and the annular cover.

4. The large-scale mining silo uniform feeding device according to claim 1, characterized in that, The silo shell includes silo walls and silo top connected together, and a feed inlet is provided on the silo top; A level gauge is installed on the surface of the silo top near the silo bottom, and the level gauge is communicatively connected to the controller; a second belt conveyor is installed on the top of the silo, and an unloading vehicle for feeding material into the silo is installed on the second belt conveyor.

5. The large-scale mining silo uniform feeding device according to claim 4, characterized in that, At least one settlement observation point is provided on the warehouse wall, and a settlement observation device is provided at the settlement observation point.

6. The large-scale mining silo uniform feeding device according to claim 1, characterized in that, Wear-resistant plates, which are cast stone plates, are fixedly provided on the surfaces of the first and second conical bottom plates near the inner cavity of the silo. Both the first and second conical bottom plates are fixedly mounted on the support platform by a support structure, and the hopper shell is fixedly and sealed to the edge of the first conical bottom plate; The first and second cone-shaped bottom plates are made of concrete, and the silo walls are made of concrete or steel.

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