COAL BLOCKAGE-PROOF FEEDING PIPE APPARATUS FOR COAL STORAGE EUROSILO

Abstract

A coal blockage-proof feeding pipe apparatus for a coal storage Eurosilo includes a central telescopic feeding pipe, a coal blockage-proof feeding pipe, and a feeding pipe mounting base connected. A middle part of a first section of round pipes of the central telescopic feeding pipe is of a conical pipe structure with a smaller upper part and a larger lower part; the first section of round pipes is connected to an upper end of the coal blockage-proof feeding pipe; a dust return plate is arranged inside the coal blockage-proof feeding pipe to guide dust-laden gas, generated at a coal falling point below and ascending along a pipe wall, downward, preventing the dust-laden gas from ascending along a cylinder wall into gaps among round pipe walls of the central 10 telescopic feeding pipe. The coal blockage-proof feeding pipe has an exhaust port to discharge the internal dust-laden gas to the outside.

Claims

1. A coal blockage-proof feeding pipe apparatus for a coal storage Eurosilo, comprising a central telescopic feeding pipe, a coal blockage-proof feeding pipe, and a feeding pipe mounting base connected in sequence, wherein a middle part of a first section of round pipes of the central telescopic feeding pipe is of a conical pipe structure with a smaller upper part and a larger lower part; the first section of round pipes is connected to an upper end of the coal blockage-proof feeding pipe; a dust return plate is arranged inside the coal blockage-proof feeding pipe to guide dust-laden gas, generated at a coal falling point below and ascending along a pipe wall, downward, preventing the dust-laden gas from ascending along a cylinder wall into gaps among round pipe walls of the central telescopic feeding pipe; and the coal blockage-proof feeding pipe is provided with an exhaust port to discharge the internal dust-laden gas to the outside of the coal blockage-proof feeding pipe.

2. The coal blockage-proof feeding pipe apparatus for a coal storage Eurosilo according to claim 1, wherein the coal blockage-proof feeding pipe comprises a flange interface, a straight section of the feeding pipe, an inclined section of the feeding pipe, and a triangular straight section of the feeding pipe connected in sequence, wherein the flange interface is connected to a lower port of the first section of round pipes, the dust return plate is arranged at a connection position of the straight section of the feeding pipe and the flange interface, and the exhaust port is opened on an upper end pipe wall of the straight section of the feeding pipe.

3. The coal blockage-proof feeding pipe apparatus for a coal storage Eurosilo according to claim 2, wherein a periphery of the exhaust port is provided with a gas collection ring for collecting the dust-laden gas, the gas collection ring is connected to a gas guide pipe, and the gas guide pipe is configured to guide the collected dust-laden gas to a coal accumulation area below.

4. The coal blockage-proof feeding pipe apparatus for a coal storage Eurosilo according to claim 3, wherein a dust removal device or an exhaust fan is installed at an outlet position of the gas guide pipe to accelerate the discharge of the dust-laden gas.

5. The coal blockage-proof feeding pipe apparatus for a coal storage Eurosilo according to claim 2, wherein a blockage sensor mounting base is arranged at a lower end of the straight section of the feeding pipe for installing and connecting a blockage sensor, the blockage sensor is configured to detect a coal accumulation state inside a feeding pipe apparatus, and a sensor shield is arranged on the blockage sensor mounting base to protect the blockage sensor from being impacted and damaged by falling coal.

6. The coal blockage-proof feeding pipe apparatus for a coal storage Eurosilo according to claim 2, wherein an inspection door that is capable of being opened and closed is opened on a wall surface of the inclined section of the feeding pipe to facilitate inspection and maintenance for a user.

7. The coal blockage-proof feeding pipe apparatus for a coal storage Eurosilo according to claim 2, wherein a lower end of the inclined section of the feeding pipe is provided with a horizontal reinforcement rib and a fixed mounting surface, the fixed mounting surface is connected to the feeding pipe mounting base through a rubber buffer and a guide rod.

8. The coal blockage-proof feeding pipe apparatus for a coal storage Eurosilo according to claim 2, wherein an upper end of the triangular straight section of the feeding pipe is provided with an arc-shaped baffle to form a triangular prism-shaped feeding pipe; two edges at a lower end of the triangular straight section of the feeding pipe directly abuts against two edges of a triangular shape on the feeding area plane of a coal discharge outlet; two sealing plates are arranged on both sides of a feeding opening on the feeding area plane; and through the sealing plates and the triangular straight section of feeding pipe, the feeding area plane and the coal discharge outlet are separated within a guide chute, ensuring that all the falling coal is concentrated onto a triangular inlet before being discharged to prevent the falling coal from accumulating on the feeding area plane.

9. The coal blockage-proof feeding pipe apparatus for a coal storage Eurosilo according to claim 2, wherein an upper port of the first section of round pipes is a sealing ring, which is configured to seal a gap between the first section of round pipes and a second section of round pipes at the upper port of the first section of round pipes, and to ensure an up and down sliding movement of the second section of round pipes relative to the first section of round pipes; the lower port of the first section of round pipes is a flange interface of the first section of round pipes, which is configured to connect and fix with a flange interface of the coal blockage-proof feeding pipe.

10. The coal blockage-proof feeding pipe apparatus for a coal storage Eurosilo according to claim 9, wherein the sealing ring is made of rubber or polyurethane materials.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0037] FIG. 1 is a schematic diagram of an overall structure of an Eurosilo;

[0038] FIG. 2 is a structural schematic diagram of an existing central telescopic feeding pipe;

[0039] FIG. 3 is a structural schematic diagram of a guide chute;

[0040] FIG. 4 is a schematic diagram of a connection between the existing central telescopic feeding pipe and a coal falling point;

[0041] FIG. 5 is a cross-sectional schematic diagram of the connection between the existing central telescopic feeding pipe and the coal falling point;

[0042] FIG. 6 is an installation schematic diagram of the present invention;

[0043] FIG. 7 is a cross-sectional schematic diagram of FIG. 6;

[0044] FIG. 8 is a schematic diagram of a coal blockage-proof feeding pipe in the present invention;

[0045] FIG. 9 is a schematic diagram of the central telescopic feeding pipe in the present invention;

[0046] FIG. 10 is a schematic diagram of a connection between a gas collection ring and a gas guide pipe in the present invention; and

[0047] FIG. 11 is an assembly schematic diagram of the coal blockage-proof feeding pipe in the present invention.

DESCRIPTION OF THE EMBODIMENTS

[0048] The present invention will be elaborated hereafter in conjunction with the accompanying drawings and specific embodiments.

Embodiments

[0049] As shown in FIG. 5, an existing central feeding pipe 6 of the Eurosilo is composed of several concentrically nested round pipes with different diameters. Two adjacent round pipes can drag each other, forming a telescopic feeding pipe apparatus with a group of round pipes. When coal adheres to pipe walls or gaps 15 among nested and overlapped pipe walls, the adhered coal hinders a normal sliding movement among the round pipes. Since lower ends of the group of overlapped round pipes are close to a coal falling point, and the coal falling point of the Eurosilo adopts a method of reducing an impact force of coal on a bearing surface through accumulated coal, it is easy to cause a lower end of the telescopic feeding pipe to directly contact the accumulated coal, leading to occurrence of various failures. In addition, a structure of the existing coal falling point of the Eurosilo makes it difficult for personnel to enter and handle the situation.

[0050] Once the central feeding pipe is blocked by coal, it cannot be stopped in time with feedback. These problems result in reduction of reliability, difficult personnel handling, high maintenance costs, and long maintenance time when the Eurosilo stores highly viscous coal.

[0051] To address this, the present solution improves the structure and mounting connection of the existing central telescopic feeding pipe of the Eurosilo (a first section of round pipes 6-1 of the central telescopic feeding pipe is directly connected to a mounting interface 17-1 of a feeding pipe mounting seat 17 on a guide chute 10), so as to solve various related problems and deficiencies that occur when the existing Eurosilo stores the highly viscous coal. As shown in FIG. 6 and FIG. 7, a coal blockage-proof feeding pipe apparatus for a coal storage Eurosilo is provided. After improvement, a coal blockage-proof feeding pipe 20 is added between the central telescopic feeding pipe 6 and the feeding pipe mounting base 17 on the guide chute 10. The coal blockage-proof feeding pipe 20 enables coal blockage detection, dust-laden gas discharge, and coal accumulation at the coal falling point, thereby addressing a telescopic jamming issue of the central telescopic feeding pipe 6 and enhancing adaptability of the Eurosilo to various types of coal. An upper end of the coal blockage-proof feeding pipe 20 is fixedly connected to a first section of round pipes 6-111 of the improved central telescopic feeding pipe 6 through a flange. A lower part of the coal blockage-proof feeding pipe 20 is connected to the feeding pipe mounting seat 17 via a fixed mounting surface 20-8, still adopting a connection manner of a rubber buffer 18 and a guide rod 19. This ensures that the entire central telescopic feeding pipe 6, coal blockage-proof feeding pipe 20, and the coal falling point do not transmit impact forces generated by coal entry to each other.

[0052] As shown in FIG. 8, the coal blockage-proof feeding pipe 20 is mainly consisted of components such as a flange interface 20-1. an exhaust port 20-2, a straight section of feeding pipe 20-3, an inclined section of feeding pipe 20-4, a horizontal reinforcing rib plate 20-5, a triangular straight section of feeding pipe 20-6, an arc baffle 20-7, a fixed mounting surface 20-8, a fastening bolt 20-9, an inspection door 20-10, a coal blockage sensor mounting base 20-11.

[0053] The upper port of the coal blockage-proof feeding pipe 20 is the flange interface 20-1, which is connected to the lower port of the improved central telescopic feeding pipe 6 through the flange. The lower port of the coal blockage-proof feeding pipe is the fixed mounting surface 20-8, which can be connected to the feeding pipe mounting seat 17 on the existing guide chute 10. A connection manner is the same as that of the first section of round pipes 6-1 of the existing central telescopic feeding pipe 6, and it is also connected through the rubber buffer 18 and the guide rod 19.

[0054] As shown in FIG. 9, an upper port of the first section of round pipes 6-111 of the improved central telescopic feeding pipe 6 is a sealing ring 6-111-2, which seals a gap between the first section of round pipes 6-111 and the second section of round pipes 6-2 at the upper port of the first section of round pipes 6-111, ensuring that the second section of round pipes 6-2 can slide up and down relative to the first section of round pipes 6-111. The sealing ring 6-111-2 can be made of rubber or polyurethane and other polymer compounds. The lower port is a flange interface 6-111-1 of the first section of round pipes, which can be connected and fixed to the flange interface 20-1 of the coal blockage-proof feeding pipe 20. A middle part of the first section of round pipes 6-111 is of a conical pipe with a smaller upper part and a larger lower part, so as to increase space between it and the second section of round pipes 6-2, preventing coal from adhering between it and the second section of round pipes.

[0055] To collect the dust-laden gas discharged from the exhaust port 20-2 of the coal blockage-proof feeding pipe 20, a gas collection ring 21-1 and a gas guide pipe 21-2 are further configured on the coal blockage-proof feeding pipe 20 (as shown in FIG. 10), and an assembly effect is shown in FIG. 11.

[0056] In a practical application, first, the position of overlapped round pipes of the unextended portion of the central telescopic feeding pipe 6 is raised, and a coal blockage-proof feeding pipe 20 is placed between it and the feeding pipe mounting base 17 (if applied to the modification of the existing Eurosilo central feeding pipe, when the Eurosilo is full and a screw conveyor 9 and a screw platform 14 are at their highest positions, it is necessary to pre-confirm an upper stroke margin of the telescopic feeding pipe 6 during retraction or appropriately reduce a coal storage volume of the Eurosilo before installing the coal blockage-proof feeding pipe 20. If applied to a newly designed Eurosilo, the modification and installation can be carried out directly). The upper port of the coal blockage-proof feeding pipe 20 is fixedly connected to the first section of round pipes 6-111 of the central telescopic feeding pipe 6 via a flange, and the middle fixed mounting surface 20-8 is connected to the feeding pipe mounting base 17. Inside the coal blockage-proof feeding pipe 20, a dust return plate 20-12 is arranged to guide the dust-laden gas, generated at the coal falling point below and ascending along the pipe wall, downward, preventing the dust-laden gas from ascending along the cylinder wall into the gaps 15 among the round pipe walls of the central telescopic feeding pipe. Simultaneously, a certain number of exhaust ports 20-2 are opened on the circumference of the pipe wall at this position to discharge part of the dust-laden gas outside the coal blockage-proof feeding pipe 20, and an annular gas collection ring 21-1 and a gas guide pipe 21-2 are arranged around the exhaust port 20-2 to collect the dust-laden gas discharged from the exhaust port 20-2 into the gas collection ring 21-1. The collected gas is then guided to a coal accumulation area below through the gas guide pipe 21-2. Furthermore, a dust removal device can be installed at the outlet of the gas guide pipe 21-2 to purify the dust-laden gas or an exhaust fan can be installed to accelerate discharge of the dust-laden gas. This method effectively prevents the dust-laden gas from climbing upward along the pipe wall of the central telescopic feeding pipe and entering the gap 15 between the pipe walls, thereby reducing adhered coal on the pipe walls and improving the reliability of the sliding movement among the round pipes of the central telescopic feeding pipe.

[0057] An inspection door 20-10 is provided on the coal blockage-proof feeding pipe 20. The inspection door 20-10 is normally closed and can be opened when handling of personnel is needed, which facilitates personnel to deal with the abnormal conditions at the coal falling point and ensures the safety of personnel.

[0058] A coal blockage sensor 22 is arranged on the coal blockage-proof feeding pipe 20, for which a coal blockage sensor mounting base 20-11 needs to be provided, and the coal blockage sensor 22 is protected from damage caused by falling coal through a sensor shield 20-11-1. The coal blockage sensor 22 is configured to detect coal accumulation inside the coal blockage-proof feeding pipe 20. When the height of the coal pile reaches a certain position, it sends a signal, which can be used to control the reduction or cessation of coal feeding. Once the coal blockage is cleared, coal feeding resumes. This avoids coal accumulation at the falling point from contacting the central feeding pipe wall, thereby reducing jamming faults during the telescopic movement of the telescopic feeding pipe and preventing safety issues in the Eurosilo caused by coal blockage in the central feeding pipe accumulating to the top.

[0059] A circular pipe wall is adopted for the upper part of the coal blockage-proof feeding pipe 20, i.e., the straight section 20-3 of the feeding pipe, and the inclined section 20-4 of the feeding pipe is adopted for the lower part of the coal blockage-proof feeding pipe 20. The inclined section is designed to match the size of the triangular inlet 16-2 of the coal discharge outlet 16 at the coal falling point. The lower part is composed of the triangular straight section 20-6 of feeding pipe and the arc baffle 20-7 to form the triangular prismatic feeding pipe. The two sides of the lower end of the feeding pipe directly abuts against the two sides of the triangle on the plane 14-1 of the coal falling area of the coal discharge outlet 16. Two sealing plates 23 are arranged on both sides of the coal discharge outlet on the plane 14-1 of the coal falling area. Through the sealing plates 23 and the triangular straight section 20-6 of feeding pipe of the coal blockage-proof feeding pipe 20, the feeding area plane 14-1 and the coal discharge outlet 16 are separated within a guide chute 10, ensuring that all the falling coal is concentrated onto a triangular inlet 16-2 before being discharged, thereby preventing the falling coal from accumulating on the feeding area plane 14-1 and eliminating accumulated coal on the plane 14-1 of the coal falling area. Using the coal blockage-proof feeding pipe 20 designed in this scheme, coal entering from the central telescopic feeding pipe of the Eurosilo to the bottom coal falling area would not accumulate on the plane 14-1 of coal falling area but directly fall onto the coal discharge outlet 16 and then enter the Eurosilo through this outlet. Through the special structure of the coal blockage-proof feeding pipe 20 (the inclined section 20-4 of the coal feeding pipe, the triangular straight-section 20-6 of feeding pipe, and the arc baffle 20-7 feature smooth surfaces, and an angle between the inclined surface and the horizontal plane greater than) 70, even for highly viscous coal, it cannot accumulate in the bottom guide chute 10 of the central telescopic feeding pipe 6 of the Eurosilo, effectively improving the capacity of the Eurosilo to handle viscous coal. In practical applications, the triangular straight section 20-6 of feeding pipe and the inclined section 20-4 of feeding pipe can be designed using wear-resistant materials or internally equipped with wear-resistant support plates (such as ceramics or wear-resistant steel plates) to further enhance a service life of the coal blockage-proof feeding pipe 20.

[0060] In summary, the present scheme can reduce various jamming and coal blockage failures of the central telescopic feeding pipe 6 caused by wet and sticky coal, minimizing severe consequences resulting from the inability of the Eurosilo to store coal normally. It also integrates functions of coal blockage detection, dust-laden gas exhaust, and prevention of coal accumulation at the coal falling point.

[0061] It will be apparent to those skilled in the art that various modifications and variations can be made to the disclosed embodiments without departing from the scope or spirit of the disclosure. In view of the foregoing, it is intended that the disclosure covers modifications and variations provided that they fall within the scope of the following claims and their equivalents.