Control device for coal feeder anti-surge bin

Abstract

The application provides a control coal feeder anti-surge bin device, which comprises a gate plate arranged at a feeding port of a coal bin, a hydraulic rod connected with the gate plate through pin shaft or welding connection to control opening and closing of the gate plate, a hydraulic station connected with the hydraulic rod through an oil pipe control circuit, and a moisture detector arranged inside the coal bin close to a coal feeder discharge port. The control coal feeder anti-surge bin device has the advantages of simple structure, convenient installation and improved work efficiency. When lifting raw coal with high moisture, the opening and closing size of the gate plate can be flexibly reduced to effectively reduce the risk of surge bin. Workers do not need to spend a lot of time to clean the outflowing coal, and the main shaft coal lifting work will not be interrupted due to the surge bin, so that the smoothness of the main shaft coal lifting process is ensured, and the overall efficiency of coal mining and transportation is improved.

Description

Technical Field

[0001] This application relates to the field of coal mining technology, and in particular to a device for controlling the anti-surge bin of a coal feeder. Background Technology

[0002] In modern raw coal mining and transportation systems, the main shaft feeder, as a crucial hub connecting the raw coal mining site and the main shaft coal bunker, bears the core task of accurately and stably feeding the mined raw coal into the main shaft coal bunker. The main shaft coal bunker, as a vital transit and storage unit in the raw coal transportation process, relies on a stable supply to ensure efficient coal extraction from the main shaft. However, when the coal in the mining area has a high moisture content, the entire raw coal transportation process is prone to difficulties, with the most prominent problem being the frequent occurrence of coal bunker overflow accidents at the feeder.

[0003] Currently, the definition of a coal feeder overflow accident is both clear and complex. During the continuous operation of the coal feeder, when it encounters raw coal with excessively high moisture content, the physical properties of the coal change significantly. Under normal circumstances, raw coal with good flowability can pass smoothly and orderly through the conveying channel under the drive of the coal feeder, entering the main shaft coal bunker according to the preset rate and path. However, when the moisture content of the coal increases significantly, the moisture acts like "glue," greatly enhancing the cohesion between coal particles. The originally relatively loose and easy-to-flow coal body becomes abnormally viscous. At key locations such as the feeder's discharge port and internal conveying channels, this highly viscous coal begins to gradually accumulate. Initially, the accumulation may not be obvious, but as the coal feeder continues to operate, more and more coal accumulates here, eventually causing the accumulation to far exceed the normal conveying capacity designed for the coal feeder. A large amount of raw coal instantly accumulates and overflows at the coal feeder, unable to enter the coal bunker at the normal speed and method—this is a typical coal feeder overflow accident.

[0004] The high moisture content of the coal is undoubtedly the main reason. From a microscopic perspective, the large amount of moisture causes a thin water film to form on the surface of the coal particles. This water film not only increases the friction between the coal particles but also promotes their adhesion. As the moisture content further increases, the cohesion between the coal particles increases dramatically, and the fluidity of the coal deteriorates significantly. During the operation of the coal feeder, its internal mechanical structures, such as the conveyor belt and scrapers, although functioning normally, struggle to effectively and evenly push the coal to the coal bunker in the face of this significantly increased viscosity. During the conveying process, the coal is more likely to stagnate near the discharge port due to excessive resistance, gradually accumulating into lumps or clusters. Inside the conveying channel, due to the coal's adhesiveness, more and more coal adheres to the channel walls, continuously reducing the actual space available for coal passage, further exacerbating coal accumulation, and ultimately leading to a coal sluice gate overflow.

[0005] Following the coal spill, a large amount of coal was scattered around the coal feeder and the work area, requiring workers to dedicate significant time and effort to cleanup. Because the coal feeder could not supply coal to the main shaft bunker normally, the coal storage level in the main shaft bunker could not be maintained at normal levels, directly disrupting the continuity of the entire coal hoisting process. The main shaft hoisting equipment might frequently idle due to coal shortages in the bunker, or be forced to reduce its hoisting speed, resulting in a significant decrease in coal mining and transportation efficiency. Utility Model Content

[0006] This application provides a device for controlling the anti-surge bin of a coal feeder, which solves the problem in the prior art that when the coal has a high moisture content, a surge accident is likely to occur at the coal feeder during feeding in the main shaft of the raw coal system.

[0007] This application provides a device for controlling the anti-surge bin of a coal feeder, comprising:

[0008] A gate is provided at the feed inlet of the coal bunker; wherein the coal feed rate of the coal feeder is adjusted by adjusting the opening and closing angle of the gate.

[0009] A hydraulic rod is connected to the gate valve via a pin or by welding to control the opening and closing of the gate valve.

[0010] A hydraulic station is connected to the hydraulic rod via an oil pipe control line; wherein, the oil pipe control line includes an upper oil pipe control line and a lower oil pipe control line; one end of the upper oil pipe control line is connected to the oil outlet of the hydraulic station, and the other end is connected to the oil inlet of the upper cavity of the hydraulic rod; one end of the lower oil pipe control line is connected to the oil outlet of the hydraulic station, and the other end is connected to the oil inlet of the lower cavity of the hydraulic rod.

[0011] A moisture detector is installed inside the coal bunker near the outlet of the coal feeder.

[0012] In some possible implementations, the hydraulic rod is further provided with an adjustment stroke mechanism, and an external thread is machined at the end of the hydraulic rod. The adjustment stroke mechanism is a threaded adjustment sleeve or a hydraulic throttle valve.

[0013] In some possible implementations, the bottom shape of the gate is arc-shaped or serrated.

[0014] In some possible implementations, a rubber sealing gasket is provided at the contact point between the gate and the feed port.

[0015] In some possible implementations, a coal quantity monitoring sensor is installed below the feed port or gate of the coal feeder.

[0016] As described above, this application provides a device for controlling the anti-surge bin of a coal feeder, comprising: a gate plate located at the feed inlet of the coal bunker; a hydraulic rod connected to the gate plate by a pin or weld to control the opening and closing of the gate plate; a hydraulic station connected to the hydraulic rod via an oil pipe control line; and a moisture detector located inside the coal bunker near the feeder outlet. This device for controlling the anti-surge bin of a coal feeder has the advantages of simple structure, convenient installation, and improved work efficiency. When lifting raw coal with high moisture content, the risk of surge can be effectively reduced by flexibly decreasing the opening and closing size of the gate plate. Workers do not need to spend a lot of time cleaning up the surging coal, and the main shaft coal lifting operation will not be interrupted due to surge, thus ensuring the smooth operation of the main shaft coal lifting process and improving the overall efficiency of coal mining and transportation. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the anti-surge device for the coal feeder provided in the embodiments of this application.

[0019] Diagram description: 1-gate; 2-hydraulic station; 3-hydraulic rod; 4-upper oil pipe control line; 5-lower oil pipe control line; 6-coal bunker; 7-moisture detector. Detailed Implementation

[0020] The embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described below do not represent all embodiments consistent with this application. They are merely examples of systems and methods consistent with some aspects of this application as detailed in the claims.

[0021] In modern raw coal mining and transportation systems, the main shaft feeder, as a crucial hub connecting the raw coal mining site and the main shaft coal bunker, bears the core task of accurately and stably feeding the mined raw coal into the main shaft coal bunker. The main shaft coal bunker, as a vital transit and storage unit in the raw coal transportation process, relies on a stable supply to ensure efficient coal extraction from the main shaft. However, when the coal in the mining area has a high moisture content, the entire raw coal transportation process is prone to difficulties, with the most prominent problem being the frequent occurrence of coal bunker overflow accidents at the feeder.

[0022] When the moisture content of coal increases significantly, the moisture acts like glue, greatly enhancing the cohesion between coal particles. The originally relatively loose and easily flowing coal mass becomes abnormally viscous. At key locations such as the feeder's outlet and internal conveying channels, this highly viscous coal begins to accumulate. Initially, the accumulation may not be obvious, but as the feeder continues to operate, more and more coal accumulates there, eventually causing the accumulation to far exceed the feeder's designed normal conveying capacity. A large amount of raw coal instantly accumulates and overflows at the feeder, unable to enter the coal bunker at the normal speed and method—this is a typical coal feeder overflow accident.

[0023] Following the coal spill, a large amount of coal was scattered around the coal feeder and the work area, requiring workers to dedicate significant time and effort to cleanup. Because the coal feeder could not supply coal to the main shaft bunker normally, the coal storage level in the main shaft bunker could not be maintained at normal levels, directly disrupting the continuity of the entire coal hoisting process. The main shaft hoisting equipment might frequently idle due to coal shortages in the bunker, or be forced to reduce its hoisting speed, resulting in a significant decrease in coal mining and transportation efficiency.

[0024] Based on this, in order to address the frequent occurrence of coal feeder surge accidents in related technologies, such as Figure 1 As shown, this application provides a device for controlling the anti-surge bin of a coal feeder, comprising:

[0025] Gate 1 is provided at the feed port of coal bunker 6; wherein the coal feed rate of the coal feeder is adjusted by adjusting the opening and closing angle of the gate 1.

[0026] The gate valve 1 can be made of a special wear-resistant and corrosion-resistant alloy material, such as alloy steel containing chromium and molybdenum. During the raw coal transportation process, coal lumps will frequently rub and collide with the gate valve 1. The wear-resistant material can extend the service life of the gate valve and reduce the problem of inaccurate coal feed control caused by wear. At the same time, if the raw coal contains corrosive components, the corrosion-resistant material can prevent the gate valve 1 from being corroded, ensuring the reliability of the device.

[0027] Hydraulic rod 3 is connected to the gate 1 by a pin or by welding to control the opening and closing of the gate 1.

[0028] Hydraulic station 2 is connected to hydraulic rod 3 via oil pipe control lines. The oil pipe control lines include an upper oil pipe control line 4 and a lower oil pipe control line 5. One end of the upper oil pipe control line 4 is connected to the oil outlet of hydraulic station 2, and the other end is connected to the upper cavity oil inlet of hydraulic rod 3. One end of the lower oil pipe control line 5 is connected to the oil outlet of hydraulic station 2, and the other end is connected to the lower cavity oil inlet of hydraulic rod 3. Hydraulic station 2 is electrically connected to a controller in a control box near the coal feeder to receive control commands from the controller.

[0029] The main function of the upper oil pipe control line 4 and the lower oil pipe control line 5 is to transmit hydraulic oil to control the extension and retraction of the hydraulic rod 3, thereby achieving precise control over the opening and closing of the gate 1. When the hydraulic station 2 injects hydraulic oil into the upper chamber of the hydraulic rod 3 through the upper oil pipe control line 4, the hydraulic oil pushes the piston downward, the hydraulic rod 3 retracts, and the gate 1 closes, reducing the coal feed rate. Conversely, when the hydraulic station 2 injects hydraulic oil into the lower chamber of the hydraulic rod 3 through the lower oil pipe control line 5, the hydraulic oil pushes the piston upward, the hydraulic rod 3 extends, and the gate 1 opens, increasing the coal feed rate. By adjusting the flow rate and pressure of the hydraulic oil in the upper oil pipe control line 4 and the lower oil pipe control line 5, precise control over the opening and closing degree of the gate 1 can be achieved. This allows for flexible adjustment of the coal feed rate according to the coal quality and actual production needs, effectively preventing coal spillage accidents.

[0030] Moisture detector 7 is located inside the coal bunker 6 near the coal feeder outlet.

[0031] Moisture detector 7 is installed inside the coal bunker near the feeder outlet to detect the moisture content of the coal about to enter the feeder. Since the moisture distribution of coal may change within the bunker, detection near the outlet provides a more accurate reflection of the actual moisture content of the coal during the feeding process. Furthermore, the detection results at this location can be directly used to control the feeder's operation, adjusting the feeding strategy in real time based on the moisture content. This ensures stable operation of the feeder under different coal quality conditions and effectively prevents the impact of bunker overflow accidents on the feeder and subsequent production processes.

[0032] The moisture detector 7 employs microwave detection, utilizing the principle of interaction between microwaves and moisture in coal. A microwave transmitter emits microwaves of a specific frequency into the coal; moisture absorbs this energy, causing changes in the microwave's reflection and transmission characteristics. The moisture detector 7 receives the reflected or transmitted microwave signals and analyzes changes in parameters such as intensity and phase to calculate the moisture content of the coal. This method offers fast detection speed, enables non-contact measurement, does not interfere with the coal transportation process, is suitable for continuous online monitoring within coal bunkers, and provides real-time coal moisture data, meeting the timeliness requirements for moisture monitoring during production.

[0033] Moisture detector 7 is electrically connected to the controller in the control box near the coal feeder. Moisture detector 7 detects the moisture content of the coal at the discharge port in real time and sends the results to the controller. This controller, installed in a dedicated control box near the coal feeder, has the advantages of short signal transmission distance and strong anti-interference capability. Due to its proximity to the coal feeder, the controller can receive signals from the coal quantity monitoring sensor, moisture detector, and other devices more quickly, and promptly issue control commands to the hydraulic station, hydraulic rods, and other actuators, improving the system's response speed and control accuracy.

[0034] In some embodiments, the hydraulic rod 3 is further provided with an adjustment stroke mechanism, and an external thread is machined at the end of the hydraulic rod 3. The adjustment stroke mechanism is a threaded adjustment sleeve or a hydraulic throttle valve.

[0035] An adjustable stroke mechanism, such as a threaded adjusting sleeve or a hydraulic throttle valve, is installed on the hydraulic rod 3. An external thread is machined at the end or a specific position of the hydraulic rod 3, and a matching internal thread is machined on the adjustable stroke mechanism (such as an adjusting nut or adjusting sleeve). By rotating the adjusting nut or sleeve, it moves along the thread of the hydraulic rod 3, thereby changing the effective stroke of the hydraulic rod. The stroke adjustment amount can be precisely controlled by rotating the nut a certain number of times.

[0036] By adjusting the stroke of the hydraulic rod 3, the opening and closing degree of the gate 1 can be controlled more precisely to meet the needs of different coal qualities and feed rates. For example, when the coal has an extremely high moisture content, the opening range of the gate 1 can be further reduced to lower the risk of coal spillage.

[0037] In some embodiments, the bottom of the gate 1 is arc-shaped or serrated.

[0038] The gate 1 is designed with a special shape, such as an arc or serrated bottom. An arc-shaped bottom allows coal to slide more smoothly when passing through the gate 1, reducing coal accumulation at the gate 1; a serrated shape increases the friction between the gate 1 and the coal, allowing for more precise control when adjusting the coal feed rate, especially for highly viscous coal, effectively preventing sudden coal slippage that could cause a surge in coal volume.

[0039] In some embodiments, a rubber sealing gasket is provided at the contact point between the gate 1 and the feed port.

[0040] A sealing structure, such as a rubber gasket, is added at the contact point between the gate 1 and the feed inlet. This prevents coal from leaking out of the gap between the gate 1 and the feed inlet, ensuring the accuracy of coal feed control, and preventing leaked coal from polluting surrounding equipment and the environment.

[0041] In some embodiments, a coal quantity monitoring sensor is installed below the feed port of the coal feeder or below the gate 1.

[0042] A coal feed rate monitoring sensor, such as an ultrasonic sensor or a gravity sensor, is installed at the feed inlet of the coal feeder or below gate 1. The sensor can monitor the coal feed rate in real time and feed the data back to the control system. When the coal feed rate approaches the threshold that may cause a coal sluice box to overflow, the control system automatically adjusts the gate opening or issues an alarm to remind the staff to take timely action.

[0043] The working principle of the anti-surge device for the coal feeder provided in this application is that the controller in the control box near the coal feeder receives the results sent by the coal quantity monitoring sensor and the moisture detector 7 in real time. When the moisture content of the coal exceeds the standard and / or the coal feed rate is close to the threshold that may cause the surge, the hydraulic station 2 injects hydraulic oil into the upper chamber of the hydraulic rod 3 through the upper oil pipe control line 4. The hydraulic oil pushes the piston to move downward, the hydraulic rod 3 contracts, and drives the gate 1 to close, reducing the coal feeder's coal feed rate.

[0044] As can be seen from the above embodiments, this application provides a device for controlling the anti-surge bin of a coal feeder, comprising: a gate plate, the gate plate being disposed at the feed inlet of the coal bunker; a hydraulic rod, the hydraulic rod being pin-connected or welded to the gate plate to control the opening and closing of the gate plate; a hydraulic station, connected to the hydraulic rod via an oil pipe control line; and a moisture detector, the moisture detector being disposed inside the coal bunker near the discharge outlet of the coal feeder. The anti-surge bin device for a coal feeder provided by this application has the advantages of simple structure, convenient installation, and improved work efficiency. When lifting raw coal with high moisture content, the risk of surge can be effectively reduced by flexibly reducing the opening and closing size of the gate plate. Workers do not need to spend a lot of time cleaning up the surging coal, and the main shaft coal lifting operation will not be interrupted due to surge, thereby ensuring the smooth operation of the main shaft coal lifting process and improving the overall efficiency of coal mining and transportation.

[0045] Similar parts between the embodiments provided in this application can be referred to mutually. The specific implementation methods provided above are only a few examples under the overall concept of this application and do not constitute a limitation on the scope of protection of this application. For those skilled in the art, any other implementation methods extended from the solution of this application without creative effort shall fall within the scope of protection of this application.

Claims

1. A device for controlling the anti-surge bin of a coal feeder, characterized in that, include: Gate (1), the gate (1) is provided at the feed port of the coal bunker (6); The coal feed rate of the coal feeder is adjusted by adjusting the opening and closing angle of the gate (1); Hydraulic rod (3), which is connected to the gate (1) by a pin or by welding, to control the opening and closing of the gate (1); The hydraulic station (2) is connected to the hydraulic rod (3) via an oil pipe control line; wherein the oil pipe control line includes an upper oil pipe control line (4) and a lower oil pipe control line (5); one end of the upper oil pipe control line (4) is connected to the oil outlet of the hydraulic station (2), and the other end is connected to the upper cavity oil inlet of the hydraulic rod (3); one end of the lower oil pipe control line (5) is connected to the oil outlet of the hydraulic station (2), and the other end is connected to the lower cavity oil inlet of the hydraulic rod (3); Moisture detector (7) is located inside the coal bunker (6) near the outlet of the coal feeder.

2. The anti-surge device for the coal feeder according to claim 1, characterized in that, The hydraulic rod (3) is also provided with an adjustment stroke mechanism. An external thread is machined at the end of the hydraulic rod (3). The adjustment stroke mechanism is a threaded adjustment sleeve or a hydraulic throttle valve.

3. The anti-surge device for the coal feeder according to claim 1, characterized in that, The bottom of the gate (1) is arc-shaped or sawtooth-shaped.

4. The anti-surge device for the coal feeder according to claim 1, characterized in that, A rubber sealing gasket is provided at the contact point between the gate (1) and the feed port.

5. The anti-surge device for the coal feeder according to claim 1, characterized in that, A coal quantity monitoring sensor is installed below the feed port or gate (1) of the coal feeder.

Images