Device for solving influence of excessive slack coal under sieve on production
By setting a scraper device and a drive arm on the conveyor belt, the problem of excessive coal under the screen affecting production is solved, and the stable operation and efficient transportation of the system are achieved.
Patent Information
- Application Number
- CN202422112350.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-28
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-08-28
AI Technical Summary
The excess coal under the screen affects production, resulting in a forced reduction in the system load and unable to meet normal demand.
The first scraper and the second scraper device are used, combined with the drive arm and the coal conveying chute, and the scraper is closely fitted with the conveyor belt, so that the excess coal is unloaded to the coal conveying chute, preventing entry into the system and ensuring stable operation of the system.
Effectively deal with excess coal, ensure the safe and stable operation of the system at full load, and avoid the accumulation of coal from affecting production.
Smart Images
Figure CN223188528U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of undersize coal diversion, in particular to a device for solving the problem of production affected by excess undersize coal. Background Art
[0002] The coal storage capacity of silos 1# to 6# for gasification coal is 60,000 cubic meters; the storage capacity of silo 7# for boiler coal is 10,000 cubic meters; the total storage capacity is 70,000 cubic meters, the raw coal conveying system has a conveying capacity of 1,200 tons / hour, the gasification coal conveying system has a conveying capacity of 1,100 tons / hour, and the boiler coal conveying system has a conveying capacity of 410 tons / hour. The raw coal produced by the upstream coal mine is transported by belt to silos 1# to 6# of the coal preparation device, and then to the coal bunker of the screening building through a ring coal feeder and a belt. The screening building is equipped with 3 relaxation screens and 1 mechanical vibrating screen for screening, and the raw coal on the screen is conveyed by belt. It is sent to the front of the furnace for screening and then screened again before entering the furnace. The lumpy coal on the screen enters the coal bunker of the gasifier, and the fine coal is transported to the coal yard by car. The fine coal screened by the screening equipment in the screening building is sent to the boiler coal bunker via a belt. When the raw coal is insufficient, it can be supplemented by purchased coal. After the purchased raw coal enters the factory, it is stored in the coal yard and loaded into the bunker by a loader through the coal receiving pit. When the fuel coal is insufficient, the fuel coal can be supplied to the 7# silo from the upstream coal mine and transported to the boiler coal bunker via a ring coal feeder and a belt. When the fine coal in the silo is insufficient, the fine coal in the coal yard can also be loaded into the boiler coal receiving pit.
[0003] The coal from the upstream coal mine is conveyed to the silo for storage via a belt conveyor, and then conveyed to the coal bunker of the screening building via a ring coal feeder and a belt conveyor. After being buffered in the coal bunker of the screening building, it is fed by an activated coal feeder and screened by a screener. The lumpy coal on the screen is conveyed to the coal bunker of the gasifier via a belt conveyor, and the fine coal under the screen is conveyed to the coal bunker of the thermal power boiler via conveyor belts 4A / B, 5A / B, 6A / B and 7A / B. When the chemical system is started or stopped or under abnormal circumstances, the fine coal under the screen cannot meet the coal demand of the thermal power boiler. The fine coal stored in the 7# silo can be used to replenish the coal to the coal bunker of the thermal power boiler via conveyor belt B ring coal feeder, conveyor belt 1B, conveyor belt 2B, conveyor 3B, conveyor 6B and conveyor 7B, or the fine coal stored in the temporary coal yard can be used via conveyor belt conveyor 4A / B, conveyor belt 5A / B, conveyor belt 6A / B and conveyor belt 7A / B. Coal is replenished through reciprocating coal feeder A / B, transmission 2A / B, transmission 3A / B, transmission 6A / B, and transmission 7A / B belts. During normal production, the thermal power boiler produces 1,200 tons of steam per hour and consumes 222 tons of fuel coal. Compared with the original design, the steam production is reduced by 652 tons per hour, and the fuel coal consumption is reduced by 16 tons per hour. In addition, the raw coal from the upstream coal mine has poor particle size and low calorific value at the receiving base, resulting in an excess of 46 tons of fine coal per hour. The fine coal can only be put into the boiler coal bunker. If the chemical system load is high, the amount of fine coal consumed by the boiler is limited, and the excess fine coal has nowhere to be stored. The system load can only be forced to drop to 83% to reduce the amount of fine coal produced, so as to maintain the balance of the entire system. Utility Model Content
[0004] The utility model aims to provide a device for solving the problem of excess fine coal under the screen affecting production, and solve the above-mentioned problems existing in the prior art.
[0005] The technical problem to be solved by the utility model is to provide a device for solving the problem of excess under-screen coal affecting production.
[0006] The technical solution of the utility model to solve the above technical problems is as follows:
[0007] A device for solving the problem of excess under-screen coal affecting production includes a first scraper, a second scraper, a coal chute and a drive arm. The first scraper and the second scraper are arranged above a conveyor belt. The coal chute is arranged on both sides of the conveyor belt with the same inclination direction as the conveyor belt. The drive arm is provided on the first scraper.
[0008] The beneficial effects of the present invention are as follows: during use, when the thermal power coal bunker reaches the controlled high level, the coal transport vehicle stops below the coal chute, and a manual start button or remote control of the central control unloader is performed. When the drive arm is pushed forward and reaches the limit, the first scraper drops, tightly fitting the first scraper with the conveyor belt, unloading the fine coal on the belt into the coal chutes on both sides of the belt, and then flowing into the coal transport vehicle through the coal chute. When the coal transport vehicle is full or the thermal power coal bunker level is low, a manual press of the button or remote control of the central control unloader is performed, the drive arm is pulled back, the first scraper is raised, and the drive arm automatically stops when it reaches the limit height. The fine coal passes from under the first and second scrapers to the thermal power coal bunker. Because the second scraper remains stationary, any fine coal that exceeds the feed amount will be scraped by the second scraper to the coal chute to be transferred by the coal transport vehicle, thereby preventing excess fine coal from entering the system and ensuring the safe and stable operation of the entire system at full load.
[0009] On the basis of the above technical solution, the present invention can also be improved as follows.
[0010] Furthermore, a bracket is provided at the front of the conveyor belt, and the second scraper is hoisted on the bracket, and a certain distance is maintained between the second scraper and the conveyor belt.
[0011] Furthermore, a plurality of symmetrical mounting holes are provided on both sides of the bracket, and the second scraper is mounted on the bracket through the mounting holes.
[0012] Furthermore, the first scraper and the second scraper have the same structure and are both V-shaped. The tips of the first scraper and the second scraper are facing the conveying direction of the conveyor belt. Cross beams are provided in the open ends of the first scraper and the second scraper. The span of the first scraper and the second scraper is greater than the width of the conveyor belt.
[0013] Furthermore, the telescopic end of the driving arm is hinged to the crossbeam of the first scraper, and the fixed end of the driving arm is fixedly connected to the bracket arranged above the conveyor belt. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the setting principle of the utility model;
[0015] Figure 2 This is a schematic diagram of the structure of a device for solving the problem of excess under-screen coal affecting production;
[0016] Figure 3 This is a schematic diagram of the left side structure of a device for solving the problem of excess under-screen coal affecting production.
[0017] In the accompanying drawings, the components represented by the reference numerals are as follows:
[0018] 1. Conveyor belt, 2. Driving arm, 3. Coal chute, 4. First scraper, 5. Second scraper, 6. Crossbeam, 7. Bracket. DETAILED DESCRIPTION
[0019] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.
[0020] like Figures 2 to 3 As shown, Example 1 of the utility model is a device for solving the problem of excess under-screen coal affecting production, comprising a first scraper 4, a second scraper 5, a coal chute 3 and a driving arm 2. The first scraper 4 and the second scraper 5 are arranged above the conveyor belt 1, and coal chutes 3 with the same inclination direction as the conveyor belt 1 are arranged on both sides of the conveyor belt 1. The driving arm 2 is provided on the first scraper 4.
[0021] During operation, when the thermal power coal bunker reaches the controlled high level, the coal transport vehicle stops beneath the coal chute 3. A button is manually activated or the central control remotely controls the unloader. When the drive arm 2 reaches the limit, the first scraper 4 drops, tightly engaging the conveyor belt 1 and unloading the fine coal from the belt into the coal chutes 3 on either side. From there, the fine coal flows into the coal transport vehicle. When the coal transport vehicle is full or the thermal power coal bunker level is low, a button is manually pressed or the central control remotely controls the unloader, pulling the drive arm 2 back and raising the first scraper 4. Once the drive arm 2 reaches the limit, it automatically stops, and the fine coal passes beneath the first and second scrapers 4, 5, and is transported to the thermal power coal bunker. Because the second scraper 5 remains stationary, any fine coal exceeding the intake rate is scraped by the second scraper 5 into the coal chute 3 for transport by the coal transport vehicle. This prevents excess fine coal from entering the system, ensuring safe and stable operation at full capacity.
[0022] In specific implementation, Figure 1 As shown, this device is installed on conveyor belt 6A. The specific installation location and dimensions must be determined based on actual site conditions. For example, the selection and specific dimensions of the first and second scrapers 4 and 5 are determined by belt width, belt speed, undersize, and space available. The high material level control in the thermal power coal bunker is determined based on the condition of the transfer vehicle.
[0023] This embodiment 2 is a device for solving the problem of excessive fine coal under the screen affecting production. On the basis of embodiment 1, a bracket 7 is provided at the front of the conveyor belt 1, and the second scraper 5 is hoisted on the bracket 7. A certain distance is maintained between the second scraper 5 and the conveyor belt 1, and the excess fine coal is scraped to the coal chute 3 through the second scraper 5.
[0024] This embodiment 3 is a device for solving the problem of excess fine coal under the screen affecting production. On the basis of embodiment 2, a number of symmetrical mounting holes are opened on both sides of the bracket, and the second scraper 5 is installed on the bracket 7 through the mounting holes. By installing the second scraper 5 in the mounting holes at different heights, the distance between the second scraper 5 and the conveyor belt 1 is adjusted, thereby adjusting the amount of fine coal on the conveyor belt 1.
[0025] This embodiment 4 is a device for solving the problem of excess under-screen coal affecting production. On the basis of embodiment 1, the first scraper 4 and the second scraper 5 have the same structure, both are V-shaped, and the tips of the first scraper 4 and the second scraper 5 are facing the conveying direction of the conveyor belt 1. The open ends of the first scraper 4 and the second scraper 5 are both provided with crossbeams 6. The span of the first scraper 4 and the second scraper 5 is greater than the width of the conveyor belt 1. When the fine coal is blocked by the first scraper 4 or the second scraper 5, it enters its V-shaped mouth, and then will be scraped out of the conveyor belt 1 along the V-shaped arm and enter the coal chute 3.
[0026] This embodiment 5 is a device for solving the problem of excess fine coal under the screen affecting production. On the basis of either embodiment 2 or 3, the telescopic end of the driving arm 2 is hinged to the crossbeam 6 of the first scraper 4, and the fixed end of the driving arm 2 is fixedly connected to the bracket 7 arranged above the conveyor belt 1. The driving arm 2 is driven by hydraulic pressure to drive the first scraper 4 to move.
[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A device for solving the problem of excess under-screen coal affecting production, characterized in that: The invention comprises a first scraper (4), a second scraper (5), a coal conveying chute (3) and a driving arm (2); the first scraper (4) and the second scraper (5) are arranged above the conveyor belt (1); the coal conveying chute (3) with the same inclination direction as the conveyor belt (1) is arranged on both sides of the conveyor belt (1); and the driving arm (2) is arranged on the first scraper (4).
2. The device for solving the problem of excess undersize coal affecting production according to claim 1, characterized in that: A bracket (7) is provided at the front of the conveyor belt (1), and the second scraper (5) is hoisted on the bracket (7), with a certain distance being maintained between the second scraper (5) and the conveyor belt (1).
3. The device for solving the problem of excess undersize coal affecting production according to claim 2, characterized in that: A plurality of symmetrical mounting holes are provided on both sides of the bracket, and the second scraper (5) is mounted on the bracket (7) through the mounting holes.
4. The device for solving the problem of excess undersize coal affecting production according to claim 1, characterized in that: The first scraper (4) and the second scraper (5) have the same structure and are both V-shaped. The tips of the first scraper (4) and the second scraper (5) are oriented toward the conveying direction of the conveyor belt (1). A crossbeam (6) is provided in the open ends of the first scraper (4) and the second scraper (5). The span of the first scraper (4) and the second scraper (5) is greater than the width of the conveyor belt (1).
5. A device for solving the problem of excess undersize coal affecting production according to any one of claims 2 or 3, characterized in that: The telescopic end of the driving arm (2) is hinged to the crossbeam (6) of the first scraper (4), and the fixed end of the driving arm (2) is fixedly connected to the bracket (7) arranged above the conveyor belt (1).