Coal hopper for thermal power plant

Abstract

The application belongs to the technical field of coal hoppers, and particularly relates to a coal hopper for thermal power plants. The coal hopper comprises a hopper body, a lower hopper and an air cannon. The outer side wall of the hopper body is attached to the inner wall of the lower hopper. An extension support is arranged between the hopper body and the lower hopper. A material guiding ring is arranged in the hopper body. An annular pipe is arranged between the material guiding ring and the inner wall of the hopper body. A plurality of nozzles are arranged on the annular pipe. The nozzles are opposite to the discharge port of the lower hopper. The air cannon is connected to the annular pipe through a pipeline. Compressed air is sprayed out through the air cannon, and then sprayed out through the nozzles after passing through the annular pipe. The coal that blocks the lower hopper can be cleaned and smoothly discharged. The material guiding ring is inclined, which is conducive to the stability of the annular pipe and the nozzles, and does not hinder the discharge. The extension support is arranged between the hopper body and the lower hopper, which can effectively support the hopper body and the lower hopper, and separate the hopper body from the lower hopper through the extension of the extension support, so that the cleaning and maintenance are facilitated.

Description

Technical Field

[0001] This application belongs to the field of coal hopper technology, and in particular relates to a coal hopper for thermal power plants. Background Technology

[0002] In thermal power plants, coal hoppers are an important component of the coal conveying system, primarily functioning to store and transport coal. Coal hoppers are typically located within the raw coal bunker in the boiler room, receiving raw coal from the coal yard via conveying equipment and transporting it to the coal mill for further processing. Coal hoppers are usually constructed of steel or reinforced concrete, with a simple shape to facilitate coal dropping and ensure reasonable stress distribution.

[0003] In existing technologies, the flow of coal in a coal hopper is affected by gravity, and the coal flow velocity gradually decreases with increasing descent depth. Especially in the lower part of the coal hopper, the coal flow velocity decreases further due to the reduced cross-sectional area, leading to increased friction between coal particles and making blockages more likely. Moreover, the coal hopper is a single welded design, making subsequent cleaning and maintenance cumbersome. Therefore, we propose a coal hopper for thermal power plants to solve the above problems. Summary of the Invention

[0004] To address the aforementioned problems in the existing technology, this application provides a coal hopper for thermal power plants that is easy to maintain and clean and avoids clogging.

[0005] To achieve the above objectives, the technical solution provided in this application is as follows:

[0006] This application provides a coal hopper for a thermal power plant, including a hopper body, a feeding hopper, and an air cannon. The outer wall of the hopper body is fitted with the inner wall of the feeding hopper. A telescopic support is provided between the hopper body and the feeding hopper. A guide ring is provided inside the hopper body. An annular pipe is provided between the guide ring and the inner wall of the hopper body. A plurality of nozzles are provided on the annular pipe. The nozzles are opposite to the feeding port of the feeding hopper. The air cannon is connected to the annular pipe through a pipeline.

[0007] Optionally, a support ring is provided on the bucket body, a support ring is provided on the feeding hopper, and a telescopic support member is provided between the support ring and the support ring. Multiple telescopic support members are provided, and the multiple telescopic support members are evenly distributed along the bucket body.

[0008] Optionally, the telescopic support includes a telescopic cylinder, one end of which is connected to a support ring and the other end of which is connected to a support ring.

[0009] Optionally, the bucket body includes an upper bucket body and a lower bucket body, the bottom end of the upper bucket body is connected to the top wall of the lower bucket body by a sealing ring, and the upper bucket body and the lower bucket body are detachably fixed.

[0010] Optionally, the upper bucket body is provided with a first docking ring, and the lower bucket body is provided with a second docking ring. The first docking ring and the second docking ring are fixed together by multiple sets of bolts and nuts.

[0011] Optionally, a plurality of connecting plates are fixed on the outer wall of the upper bucket body, a collar is fixed at the bottom end of the outer wall of the upper bucket body, the bottom end of the connecting rod is connected to the collar, the inner wall of the collar is fitted with the outer wall of the lower bucket body, and the first docking ring is disposed on the collar.

[0012] Optionally, a sealing ring is provided between the hopper body and the discharge hopper.

[0013] Optionally, multiple support ribs are provided between the support ring and the hopper body, and between the supporting ring and the discharge hopper.

[0014] Optionally, the air cannon is mounted on a support ring.

[0015] Optionally, the bucket body is provided with a reinforcing ring, and multiple reinforcing ribs are evenly arranged between the reinforcing ring and the outer wall of the bucket body.

[0016] Compared with the prior art, this application has at least the following beneficial effects:

[0017] This application utilizes an air cannon to spray compressed air, which is then ejected through a ring pipe and nozzle to clear coal blockages in the hopper, ensuring smooth material discharge. An inclined guide ring stabilizes the ring pipe and nozzle without obstructing discharge. A telescopic support between the hopper body and the hopper allows for effective support and also enables separation of the hopper body from the hopper by extension, facilitating cleaning and maintenance.

[0018] The detachable connection between the upper and lower buckets facilitates cleaning and maintenance of the equipment; a double seal is achieved through the use of collars and sealing rings. This application offers high stability and significantly improved flexibility, simplifying equipment maintenance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of a coal hopper for a thermal power plant proposed in this utility model.

[0021] Figure 2 This is a schematic cross-sectional view of a coal hopper for a thermal power plant proposed in this utility model.

[0022] Figure 3 for Figure 2 A magnified structural diagram of part A in the diagram;

[0023] Figure 4 for Figure 2 A magnified structural diagram of part B in the diagram;

[0024] Explanation of reference numerals in the attached drawings: 1. Upper bucket body; 11. Connecting plate; 12. Collar ring; 13. First docking ring; 14. Connecting ring; 15. Reinforcing rib; 16. Reinforcing ring; 2. Lower bucket body; 21. Second docking ring; 22. Bolt; 23. Nut; 3. Discharge hopper; 4. Air cannon; 5. Telescopic support component; 6. Guide ring; 61. Annular tube; 62. Nozzle; 7. Assembly sealing ring; 8. Support ring; 9. Supporting ring; 10. Support rib plate. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use.

[0026] Example 1

[0027] like Figure 1-4 As shown, a coal hopper for a thermal power plant includes a hopper body, a feeding hopper 3, and an air cannon 4. The outer wall of the hopper body is fitted to the inner wall of the feeding hopper 3. A telescopic support 5 is provided between the hopper body and the feeding hopper 3. A guide ring 6 is provided inside the hopper body. An annular pipe 61 is provided between the guide ring 6 and the inner wall of the hopper body. Several nozzles 62 are provided on the annular pipe 61 and are evenly arranged along the annular pipe 61. The nozzles 62 are opposite to the feeding port of the feeding hopper 3. The air cannon 4 is connected to the annular pipe 61 through a pipeline. In this embodiment, the angle between the guide ring 6 and the vertical direction is 10-30°.

[0028] Compressed air is ejected by air cannon 4, and after passing through annular pipe 61, it is ejected from nozzle 62, which can clear the coal blockage in hopper 3 and ensure smooth material discharge. The inclined guide ring 6 is designed to stabilize annular pipe 61 and nozzle 62 without obstructing material discharge. The telescopic support 5 is installed between the hopper body and hopper 3, which can effectively support the hopper body and separate the hopper body from hopper 3 by extending the telescopic support 5, making cleaning and maintenance convenient.

[0029] Example 2

[0030] The difference between this embodiment and embodiment 1 is that the bucket body includes an upper bucket body 1 and a lower bucket body 2. The bottom end of the upper bucket body 1 is connected to the top wall of the lower bucket body 2 by a sealing ring 7. The upper bucket body 1 and the lower bucket body 2 are detachably fixed. The outer side wall of the lower bucket body 2 is fitted with the inner side wall of the feeding hopper 3.

[0031] In this embodiment, a connecting ring 14 and several connecting plates 11 are fixed on the outer wall of the upper bucket body 1. The connecting plates 11 are evenly arranged along the outer wall of the upper bucket body 1. A collar 12 is fixed at the bottom of the outer wall of the upper bucket body 1. The top of the connecting plate 11 is connected to the connecting ring 14, and the bottom of the connecting plate 11 is connected to the collar 12. The inner wall of the collar 12 fits against the outer wall of the lower bucket body 2, which can achieve secondary sealing. A first docking ring 13 perpendicular to the collar 12 is fixed on the collar 12. A second docking ring 21 is provided on the lower bucket body 2. The first docking ring 13 and the second docking ring 21 are arranged in parallel, and the first docking ring 13 and the second docking ring 21 are fixed together by multiple sets of bolts 22 and nuts 23. By removing the bolts 22 and nuts 23, the locking of the first docking ring 13 and the second docking ring 21 can be released, and the upper bucket body 1 can be disassembled.

[0032] The lower bucket body 2 is provided with a support ring 8, the feeding bucket 3 is provided with a support ring 9, and the telescopic support member 5 is arranged between the support ring 8 and the support ring 9. There are multiple telescopic support members 5, and the multiple telescopic support members 5 are evenly distributed along the bucket body.

[0033] In this embodiment, the telescopic support 5 includes a telescopic cylinder. One end of the telescopic cylinder is connected to the support ring 8, and the other end is connected to the support ring 9. The telescopic cylinder can improve the stability of the lower bucket 2 and enable the lower bucket 2 to be tightly connected to the feeding hopper 3. When the telescopic cylinder extends, the feeding hopper 3 and the lower bucket 2 can be separated.

[0034] To further improve the sealing effect, a sealing ring is installed between the lower hopper 2 and the feeding hopper 3.

[0035] Multiple support ribs 10 are provided between the support ring 8 and the lower bucket body 2, and between the support ring 9 and the feeding hopper 3; the upper bucket body 1 is provided with a reinforcing ring 16, and multiple reinforcing ribs 15 are evenly arranged between the reinforcing ring 16 and the outer wall of the upper bucket body 1, thereby improving the overall strength of the structure.

[0036] In this embodiment, the air cannon 4 is mounted on the support ring 9.

[0037] This embodiment detachably connects the upper bucket 1 and the lower bucket 2, facilitating cleaning and maintenance of the equipment; a double seal is achieved through the collar 12 and the sealing ring. This application offers strong stability and significantly improved flexibility, simplifying equipment maintenance.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A coal hopper for a thermal power plant, characterized in that, The device includes a bucket body, a feeding hopper, and an air cannon. The outer wall of the bucket body is fitted to the inner wall of the feeding hopper. A telescopic support is provided between the bucket body and the feeding hopper. A guide ring is provided inside the bucket body. An annular pipe is provided between the guide ring and the inner wall of the bucket body. Several nozzles are provided on the annular pipe. The outlet of the nozzles is opposite to the feeding port of the feeding hopper. The air cannon is connected to the annular pipe through a pipeline.

2. The coal hopper for a thermal power plant according to claim 1, characterized in that, The bucket body is provided with a support ring, the feeding hopper is provided with a support ring, and the telescopic support is provided between the support ring and the support ring. Multiple telescopic support members are provided and are evenly distributed along the bucket body.

3. The coal hopper for a thermal power plant according to claim 2, characterized in that, The telescopic support includes a telescopic cylinder, one end of which is connected to a support ring and the other end of which is connected to a support ring.

4. The coal hopper for a thermal power plant according to claim 1, characterized in that, The bucket body includes an upper bucket body and a lower bucket body. The bottom end of the upper bucket body is connected to the top wall of the lower bucket body by a sealing ring. The upper bucket body and the lower bucket body are detachably fixed together.

5. The coal hopper for a thermal power plant according to claim 4, characterized in that, The upper bucket body is provided with a first docking ring, and the lower bucket body is provided with a second docking ring. The first docking ring and the second docking ring are fixed together by multiple sets of bolts and nuts.

6. The coal hopper for a thermal power plant according to claim 5, characterized in that, Several connecting plates are fixed on the outer wall of the upper bucket body, and a collar is fixed at the bottom of the outer wall of the upper bucket body. The bottom end of the connecting rod is connected to the collar. The inner wall of the collar fits against the outer wall of the lower bucket body, and the first docking ring is set on the collar.

7. The coal hopper for a thermal power plant according to claim 1, characterized in that, A sealing ring is provided between the hopper body and the feeding hopper.

8. The coal hopper for a thermal power plant according to claim 2, characterized in that, Multiple support ribs are provided between the support ring and the hopper body, and between the support ring and the discharge hopper.

9. The coal hopper for a thermal power plant according to claim 1, characterized in that, The air cannon is mounted on the support ring.

10. The coal hopper for a thermal power plant according to claim 1, characterized in that, The bucket body is equipped with a reinforcing ring, and multiple reinforcing ribs are evenly arranged between the reinforcing ring and the outer wall of the bucket body.

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