Easy-to-replace coal chute structure
By using a nested connection structure of a split upper guide frame and a lower coal chute, combined with fixed supports and sealing gaskets, the problem of wear on the feed hopper of the belt conveyor is solved, and the coal chute can be easily disassembled and installed, improving the stability and efficiency of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HU ZHOU ZHI LI CHANG HE RE DIAN YOU XIAN GONG SI
- Filing Date
- 2025-09-11
- Publication Date
- 2026-07-31
AI Technical Summary
The feed hoppers of existing thermal power plants' belt conveyors are prone to wear under the impact of burning coal, resulting in uneven distribution of wear points. This increases the workload of operators and the difficulty of equipment replacement, and the structural strength decreases after frequent welding repairs.
The system adopts a split upper guide frame and lower coal chute structure, which is connected by inner and outer nesting and fastening. Combined with fixed brackets and sealing gaskets, it achieves independent support and sealing of the lower coal chute. The disassembly bolts and pressure plate structure facilitate disassembly and installation and avoid equipment collisions.
It improves the replacement efficiency and operational convenience of the coal chute, reduces equipment downtime and wear risk, and ensures the stability and sealing of the equipment.
Smart Images
Figure CN224577227U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a coal auxiliary conveying mechanism, and in particular to a coal chute structure that is easy to replace. Background Technology
[0002] Thermal power plants require two-stage crushing of coal during production. First, a primary crusher performs initial crushing, followed by a secondary crusher for finer crushing, resulting in coal fragments that meet the required specifications. To facilitate coal transfer, the coal exits from the bottom outlet of the primary crusher and falls vertically downwards through a sealed cover into the feed hopper of a belt conveyor. From there, the coal is lifted by the conveyor belt and fed into the secondary crusher through the top inlet.
[0003] The problem encountered during the implementation of this conveying method is that the significant impact force exerted on the feed hopper of the belt conveyor when coal falls from the primary crusher onto the belt conveyor causes frequent wear during daily use. Even the use of manganese steel as the material for the coal chute cannot completely solve this wear problem. To address this issue, the manufacturer currently installs an inspection door on one side of the sealed cover and regularly observes the wear condition of the inner wall of the feed hopper through this door. Once severe wear and a potential coal leakage hazard are detected, operators weld lining plates to the worn areas inside the feed hopper to ensure the structural stability of the feed hopper after long-term use.
[0004] However, this approach has several drawbacks. First, the worn areas of the feed hopper are distributed around its inner wall, preventing workers from repairing individual areas. Instead, all worn areas need repair, significantly increasing workload and causing prolonged equipment downtime. Second, repeated welding repairs to the feed hopper's inner wall reduce its overall structural strength and resistance to deformation, requiring the manufacturer to completely remove and replace the feed hopper from the conveyor belt and sealing cover. Existing feed hoppers, however, are limited by space constraints, making rapid disassembly and replacement difficult and increasing the risk of collisions with external equipment during replacement, thus increasing the likelihood of equipment damage.
[0005] Therefore, the feed hoppers of existing thermal power plant belt conveyors have the drawback of being inconvenient to replace. Utility Model Content
[0006] The purpose of this invention is to provide a coal chute structure that is easy to replace. It improves the efficiency and ease of operation for workers replacing the coal chute.
[0007] The technical solution of this utility model is as follows: a replaceable coal chute structure, including a feed hopper, the outside of which is connected to a coal conveyor via a fixed bracket, and a sealing cover connected to the top of the feed hopper. The feed hopper includes a split upper guide frame and a lower coal chute, which are nested and interlocked with each other. The top of the upper guide frame is connected to the sealing cover, and the outside of the lower coal chute is connected to the fixed bracket via an installation assembly. The installation assembly includes an installation plate fixed to the outer wall of the lower coal chute, and a support member is connected to the outside of the installation plate via a first bolt. The lower end of the support member is connected to the fixed bracket via a second bolt. The two ends of the support member are respectively provided with a first elongated hole for connecting the first bolt and a second elongated hole for connecting the second bolt.
[0008] In the aforementioned easily replaceable coal chute structure, the lower end of the upper guide frame forms an inwardly inclined inner positioning part, and the upper end of the lower coal chute forms an outer positioning part. The outer positioning part is sleeved on the outside of the inner positioning part and fits against the inner positioning part.
[0009] In the aforementioned easily replaceable coal chute structure, the inner wall of the outer positioning part is connected with a sealing gasket around its perimeter, and the outer side of the sealing gasket is fitted to the inner positioning part.
[0010] In the aforementioned easily replaceable coal chute structure, the fixed supports are symmetrically arranged on the left and right sides of the coal conveyor, the top of the fixed supports forms a crossbeam, and the middle of the crossbeam is connected to a support member.
[0011] In the aforementioned easily replaceable coal chute structure, the lower end of the crossbeam is detachably connected to an L-shaped pressure plate, and the upper end of the pressure plate extends above the crossbeam to form a vertical pressure surface.
[0012] In the aforementioned easily replaceable coal chute structure, a gap is formed between the mounting plate and the crossbeam to allow the lower coal chute to detach from the upper guide frame.
[0013] In the aforementioned easily replaceable coal chute structure, the pressure plate has a through hole in the middle, and a disassembly bolt is slidably connected in the through hole. One end of the disassembly bolt passes through the pressure plate and is threadedly connected to the support.
[0014] Compared with the prior art, this utility model has the following characteristics: (1) This utility model uses the structure of the upper guide frame and the lower coal chute to connect them by interlocking. The lower coal chute bears the impact force from the burning coal, while the fixed bracket provides separate support for the lower coal chute to ensure the installation stability of the lower coal chute. When the lower coal chute is damaged, the operator can remove the support and move the lower coal chute downward to separate it from the upper guide frame. Then, the hoisting equipment can lift it horizontally. During the loading and unloading process, there is no need to operate the connection structure between the upper guide frame and the sealing cover, and there will be no collision with the sealing cover, the upper guide frame and other external facilities, which effectively improves the loading and unloading efficiency and the ease of operation. (2) By setting the sealing gasket on the inner wall of the outer positioning part, the upper guide frame and the lower coal chute can be completely fitted together and sealed, thereby preventing dust from overflowing from the feed hopper; on this basis, by coordinating the support and fixed bracket, the lower coal chute can also be provided with an upward pushing force by the horizontal extrusion support during installation, so that the lower coal chute can slowly move upward under the action of the pushing force until it is completely fitted with the upper guide frame, thus ensuring the sealing effect of the sealing gasket and preventing the two from being deformed by force at the connection. (3) Through the structural cooperation of the pressure plate and the disassembly bolt, the operator can drive the support to move outward by screwing in the disassembly bolt during disassembly, thereby realizing the disassembly of the support and effectively preventing the lower coal chute from falling directly during the disassembly process, thus ensuring the safety of the disassembly work. Therefore, this utility model can improve the efficiency and ease of operation for operators in replacing coal chutes. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 A magnified view from direction A; Figure 3 yes Figure 1 View from direction B; Figure 4 This is a schematic diagram of the connection between the upper guide frame and the lower coal chute.
[0016] The labels in the attached diagram are as follows: 1-feed hopper, 2-fixed bracket, 3-coal conveyor, 4-sealing cover, 5-upper guide frame, 6-lower coal chute, 7-mounting plate, 8-first bolt, 9-support component, 10-second bolt, 11-sealing gasket, 12-pressure plate, 13-removal bolt, 201-crossbeam, 501-inner positioning part, 601-outer positioning part. Detailed Implementation
[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.
[0018] Example. An easily replaceable coal chute structure, configured as follows: Figure 1 As shown, it includes a feed hopper 1, and the outside of the feed hopper 1 is connected to a coal conveyor 3 via a fixed bracket 2. The coal conveyor 3 is a belt conveyor or a hoist. The fixed brackets 2 are connected to the two side frames of the coal conveyor 3, and a sealing cover 4 is connected to the top of the feed hopper 1. The feed hopper 1 includes a split upper guide frame 5 and a lower coal chute 6. The upper guide frame 5 and the lower coal chute 6 are nested together and interlocked. The top of the upper guide frame 5 is connected to a sealing cover 4 by flange bolts. A sealing gasket 11 is provided at the flange connection between the upper guide frame 5 and the sealing cover 4 for sealing. The lower coal chute 6 is connected to a fixed bracket 2 via an installation assembly. The installation assembly includes an installation plate 7 fixed to the outer wall of the lower coal chute 6. A support member 9 is connected to the outside of the installation plate 7 by a first bolt 8. The lower end of the support member 9 is connected to the fixed bracket 2 by a second bolt 10. The two ends of the support member 9 are respectively provided with a first elongated hole for connecting the first bolt 8 and a second elongated hole for connecting the second bolt 10.
[0019] The top of the lower coal chute 6 is equipped with lifting rings around its perimeter for hoisting.
[0020] The lower end of the upper guide frame 5 forms an inwardly inclined inner positioning part 501, and the upper end of the lower coal chute 6 forms an outer positioning part 601. The outer positioning part 601 is sleeved on the outside of the inner positioning part 501 and fits against the inner positioning part 501.
[0021] The inner wall of the outer positioning part 601 is connected with a flexible sealing gasket 11, and the outer side of the sealing gasket 11 is attached to the inner positioning part 501.
[0022] The fixed brackets 2 are symmetrically arranged on the left and right sides of the coal conveyor 3. The top of the fixed brackets 2 forms a crossbeam 201. The middle part of the crossbeam 201 is connected to the support member 9. The crossbeams 201 on both sides of the support member 9 are provided with L-shaped guide rails for guiding the support member 9 in the horizontal direction. The two ends of the support member 9 are fastened and connected in the L-shaped guide rails.
[0023] The lower end of the crossbeam 201 is detachably connected to an L-shaped pressure plate 12, and the upper end of the pressure plate 12 extends above the crossbeam 201 to form a vertical pressure surface.
[0024] A gap is formed between the mounting plate 7 and the crossbeam 201 to allow the lower coal chute 6 to disengage from the upper guide frame 5.
[0025] The pressure plate 12 has a through hole in the middle, and a disassembly bolt 13 is slidably connected in the through hole. One end of the disassembly bolt 13 passes through the pressure plate 12 and is threadedly connected to the support member 9.
[0026] The working principle of this utility model is as follows: The feed hopper 1 is divided into an upper guide frame 5 and a lower coal chute 6. This allows the impact force of falling coal to be directly applied to the lower coal chute 6, while the upper guide frame 5 remains largely unaffected. This allows operators to repair or replace the lower coal chute 6 independently. When the lower coal chute 6 shows severe wear and needs replacement, operators can first hoist the top of the lower coal chute 6, then remove the first bolt 8 and the second bolt 10 on both sides of the support member 9, thus releasing the fixing bracket 2 from the lower coal chute 6. Then, the disassembly bolts 13 on both sides of the lower coal chute 6 are screwed in. After being screwed in, the disassembly bolts 13 can move the support member 9 outwards. Simultaneously, the lower coal chute 6 is supported by the support member 9 and hoisted by the top lifting device, allowing it to gradually descend with the lateral movement of the support member 9 until it separates from the upper guide frame 5. This effectively prevents the lower coal chute 6 from shaking or falling rapidly during disassembly. After the support component 9 is separated from the lower coal chute 6, it can be directly removed. Then, the workers can use hoisting equipment to lift the lower coal chute 6 horizontally, thus achieving the disassembly function of the lower coal chute 6. Based on this, the workers can then repair or replace the lower coal chute 6 directly, ensuring the stability of the lower coal chute 6 in subsequent use.
[0027] When installing the lower coal chute 6, the operators first hoist the lower coal chute 6 to the underside of the upper guide frame 5 in the same manner, separating the two. Then, the support member 9 is placed between the crossbeam 201 and the mounting plate 7, and a hydraulic jack is used to apply inward pressure to the mounting plate 7 based on the pressure plate 12. This causes the mounting plate 7 to move inward, which in turn drives the lower coal chute 6 to slowly rise until the lower coal chute 6 is completely in contact with the upper guide frame 5. After the lower coal chute 6 is in place, the operators then fix the first bolt 8 and the second bolt 10 to the support member 9, thereby securing the support member 9 and the lower coal chute 6.
Claims
1. A replaceable coal chute structure, comprising a feed hopper (1), the outside of which is connected to a coal conveyor (3) via a fixed bracket (2), and a sealing cover (4) connected to the top of the feed hopper (1), characterized in that: The feed hopper (1) includes a split upper guide frame (5) and a lower coal chute (6). The upper guide frame (5) and the lower coal chute (6) are nested together and interlocked. The lower coal chute (6) is connected to a fixed bracket (2) via an installation assembly. The installation assembly includes an installation plate (7) fixed on the outer wall of the lower coal chute (6). The installation plate (7) is connected to a support member (9) via a first bolt (8). The lower end of the support member (9) is connected to the fixed bracket (2) via a second bolt (10). The two ends of the support member (9) are respectively provided with a first elongated hole for connecting the first bolt (8) and a second elongated hole for connecting the second bolt (10).
2. The easily replaceable coal chute structure according to claim 1, characterized in that: The lower end of the upper guide frame (5) forms an inwardly inclined inner positioning part (501), and the upper end of the lower coal chute (6) forms an outer positioning part (601). The outer positioning part (601) is sleeved on the outside of the inner positioning part (501) and fits against the inner positioning part (501).
3. The easily replaceable coal chute structure according to claim 2, characterized in that: The outer positioning part (601) has a sealing gasket (11) connected around its inner wall, and the outer side of the sealing gasket (11) is attached to the inner positioning part (501).
4. The easily replaceable coal chute structure according to claim 1, wherein: The fixed bracket (2) is symmetrically arranged on the left and right sides of the coal conveyor (3). A crossbeam (201) is formed at the top of the fixed bracket (2), and a support member (9) is connected in the middle of the crossbeam (201).
5. The easily replaceable coal chute structure according to claim 4, wherein: The lower end of the crossbeam (201) is detachably connected to an L-shaped pressure plate (12), the upper end of which extends above the crossbeam (201) and forms a vertical pressure surface.
6. The easily replaceable coal chute structure according to claim 4, wherein: A gap is formed between the mounting plate (7) and the crossbeam (201) to allow the lower coal chute (6) to disengage from the upper guide frame (5).
7. The easily replaceable coal chute structure according to claim 5, characterized in that: The pressure plate (12) has a through hole in the middle, and a disassembly bolt (13) is slidably connected in the through hole. One end of the disassembly bolt (13) passes through the pressure plate (12) and is threadedly connected to the support member (9).