Anti-blocking electro-hydraulic coal pushing device for raw coal bunker

Abstract

The utility model relates to a kind of original coal bunker anti-blocking electro-hydraulic coal pusher. Including double-layer split coal hopper and hydraulic pressure clearing mechanism, double-layer split coal hopper includes raw coal bunker, clearing mechanism and cover plate, and hydraulic pressure clearing mechanism includes bolt A, adjustable connecting block, bolt B, guide rod, electro-hydraulic push rod, fixed seat A, fixed seat B, guide bush and diamond-shaped shovel;Raw coal bunker coal outlet is set in clearing mechanism inside, electro-hydraulic push rod is fixedly connected on the outer wall of clearing mechanism, and adjustable connecting block two ends are respectively with the piston rod of electro-hydraulic push rod and guide rod swing joint, and guide rod passes through guide bush and is fixedly connected with diamond-shaped shovel;Under the drive of electro-hydraulic push rod, diamond-shaped shovel moves up and down on the inner wall of clearing mechanism, pushes the coal material adhered to inner wall, and disturbs coal material arching place, reduces coal material internal friction resistance, realizes coal dredging.The utility model structure is simple, convenient to operate, and clearing effect is good.

Description

Technical Field

[0001] This utility model belongs to the field of coal feeding technology, specifically relating to an electro-hydraulic coal pusher that uses telescopic disturbance to clear blockages when there is coal blockage inside the raw coal bunker. Background Technology

[0002] In coal-fired power plants, fuel transportation is a crucial component of the entire power generation process. The raw coal bunker is an intermediate storage device for coal supplied to the boiler. In actual operation, raw coal is first transported to the bunker and then falls under gravity into subsequent equipment such as the coal mill. However, because the raw coal bunker structure is often cylindrical at the top and conical at the bottom, the surface area gradually decreases as the material flows downwards. Fine coal powder easily adheres to the inner wall of the bunker, continuously increasing the friction coefficient and creating a central flow pattern, leading to blockages that severely affect the normal operation of the equipment. The probability of blockage in the raw coal bunker increases dramatically, especially when the coal quality changes (increased moisture and enhanced agglomeration after co-firing coal slime). Once a blockage occurs in the raw coal bunker, the unit is forced to reduce output and reduce load, or experience large-scale oil injection due to unstable boiler combustion, which can lead to boiler shutdown and unplanned unit outages in severe cases.

[0003] Common methods for clearing blockages in raw coal bunkers include manual unblocking, wall vibration, blasting vibration, and air cannon arch breaking. However, these methods have the following drawbacks: (1) Manual unblocking involves pre-drilling several holes in the inclined wall of the coal bunker. Once the coal bunker arches, tools are inserted into the bunker to poke it or a sledgehammer is used to knock the coal arch down. This method is simple in design, but the labor intensity is high and the safety is difficult to guarantee. It will be ineffective when the bunker is severely blocked. (2) Blasting vibration is commonly used when the blockage is high above the bottom opening. This method is simple to operate and has a high success rate. However, it has poor safety and controllability and is easy to damage the silo body, so it has been banned from use; (3) The silo wall vibration method uses electric hammer vibration to replace manual vibration, which is effective for short-term coal blockage, but it is useless when the coal blockage time is long; (4) The air cannon arch breaking method is a commonly used method at present. An air cannon arch breaking device is installed at the bottom of the coal silo. The airflow generated by the sudden release of compressed air impacts and vibrates the material, causing the material to fall loosely. This method is simple to operate and effective for loose coal blockage, but the effective area is limited by the installation position, which can easily cause new blockage points at the bottom, so as to completely block the coal.

[0004] Therefore, there is a lack of a new type of coal pusher that can be used to prevent and clear blockages inside the raw coal bunker, so that the coal can be output evenly and meet the requirements of simple structure, convenient operation, safety and reliability. Summary of the Invention

[0005] To overcome the shortcomings of the existing technology, this utility model provides an anti-clogging electro-hydraulic coal pusher for raw coal bunkers. A clearing chamber is nested outside the coal outlet of the raw coal bunker, and a hydraulic clearing mechanism is installed. An electro-hydraulic pusher drives a diamond-shaped shovel adapted to the arc surface of the bunker wall to move up and down, pushing the coal adhering to the inner wall of the clearing chamber and clearing the blockage. This solves the problems of poor cleaning effect, complex operation, and high safety risks of traditional clearing equipment. When used in conjunction with a coal shortage monitoring sensor, the anti-clogging electro-hydraulic coal pusher can automatically identify coal blockage signals and promptly push coal to clear the blockage, ensuring smooth coal discharge from the bunker and preventing accidents such as forced load reduction and unplanned shutdowns caused by coal bunker blockages.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: an anti-clogging electro-hydraulic coal pusher for raw coal bunkers, comprising a double-layer split coal hopper and a hydraulic unblocking mechanism installed on the double-layer split coal hopper;

[0007] The double-layer split coal hopper includes a raw coal bin, a clearing bin, and a cover plate. The coal outlet of the raw coal bin is located inside the coal inlet of the clearing bin. The cover plate is annular, and its inner and outer edges are movably connected to the raw coal bin and the clearing bin by bolts, respectively.

[0008] The hydraulic unblocking mechanism includes bolt A, adjustable connecting block, bolt B, guide rod, electro-hydraulic push rod, fixed seat A, fixed seat B, guide bushing and diamond-shaped shovel;

[0009] The electro-hydraulic actuator is provided with a fixed seat A and a fixed seat B, and is fixedly connected to the outer wall of the unclogging chamber through the fixed seat A and the fixed seat B;

[0010] The piston rod of the electro-hydraulic actuator is movably connected to one end of the adjustable connecting block via bolt B, and the other end of the adjustable connecting block is movably connected to the guide rod via bolt A.

[0011] The guide rod passes through the guide bushing and is fixedly connected to the diamond shovel. The guide bushing is located between the raw coal bunker and the unblocking bunker and is fixedly connected to the inner wall of the unblocking bunker.

[0012] The diamond-shaped shovel has an arc-shaped side that fits against the inner wall of the unblocking chamber. Driven by the electro-hydraulic push rod and guide rod, it moves up and down along the inner wall of the unblocking chamber to push the coal material adhering to the inner wall and disturb the coal material at the arching point, thereby reducing the internal friction resistance of the coal material and realizing the unblocking of the coal blockage.

[0013] The driving force of the electro-hydraulic actuator is not less than 100kN, and the piston rod stroke is not less than 1100mm.

[0014] The electro-hydraulic actuator is arranged parallel to the wall of the unclogging chamber, and the guide rod is also arranged parallel to the wall of the unclogging chamber.

[0015] The coal inlet and outlet of the unblocking bin are both larger than the coal outlet of the raw coal bin.

[0016] The adjustable connecting block is adjustable from 0 to 100 mm, and the distance between the outer wall of the raw coal bunker and the inner wall of the unblocking bunker is 150 mm.

[0017] By adopting the above technical solution, the beneficial effects obtained by this utility model are:

[0018] This utility model provides a simple structure for an anti-clogging electro-hydraulic coal pusher for raw coal bunkers. An electro-hydraulic push rod drives a diamond-shaped shovel to move up and down within the unclogging chamber, disturbing the coal at the point of bridging, reducing internal frictional resistance, and achieving high-efficiency unblocking. The diamond-shaped shovel conforms to the curved surface of the unclogging chamber's inner wall, maximizing the effective working area. The guide sleeve ensures that the guide rod and the electro-hydraulic push rod remain parallel, guaranteeing that the diamond-shaped shovel stays in contact with the chamber wall during movement. The adjustable connecting block has a 100mm adjustment range, ensuring that the distance between the guide rod and the electro-hydraulic push rod can be adjusted according to the actual site conditions during installation. This utility model innovatively adds an unclogging chamber at the raw coal bunker outlet, placing the unclogging mechanism on the outer wall of the raw coal bunker. Installation and maintenance are simple. When the coal flow is normal, the diamond-shaped shovel can retract into the gap between the raw coal bunker and the unclogging chamber, without affecting the flowability of the raw coal, and also preventing coal jamming in mechanical parts.

[0019] The present invention will now be described in detail with reference to the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the overall structure of an anti-clogging electro-hydraulic actuator for raw coal bunkers according to this utility model.

[0021] Figure 2 This is a side view of the overall structure of an anti-clogging electro-hydraulic actuator for raw coal bunkers according to this utility model.

[0022] In the diagram: 1-Raw coal bunker, 2-Bolt A, 3-Adjustable connecting block, 4-Bolt B, 5-Guide rod, 6-Electro-hydraulic actuator, 7-Cover plate, 8-Fixed seat A, 9-Guide bushing, 10-Rhomboid shovel, 11-Fixed seat B, 12-Clearing bin. Detailed Implementation

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0024] like Figure 1 As shown, the present invention provides an anti-clogging electro-hydraulic push rod for raw coal bunkers, comprising a double-layered split coal hopper and a hydraulic unclogging mechanism installed on the double-layered split coal hopper.

[0025] like Figure 1 As shown, the double-layer split coal hopper includes a raw coal bin 1, a clearing bin 12, and a cover plate 7. The coal outlet of the raw coal bin 1 is located inside the coal inlet of the clearing bin 12. The cover plate 7 is annular, and its inner and outer edges are movably connected to the raw coal bin 1 and the clearing bin 12 by bolts, respectively, to ensure the overall stability and tightness of the bin structure. The cover plate 7 can be disassembled during maintenance.

[0026] like Figure 1 As shown, the hydraulic unblocking mechanism includes bolt A2, adjustable connecting block 3, bolt B4, guide rod 5, electro-hydraulic push rod 6, fixed seat A8, fixed seat B11, guide bushing 9, and diamond shovel 10.

[0027] like Figure 1 As shown, the electro-hydraulic actuator 6 is provided with a fixed seat A8 and a fixed seat B11, and is fixedly connected to the outer wall of the unblocking chamber 12 through the fixed seat A8 and the fixed seat B11.

[0028] like Figure 1 As shown, the piston rod of the electro-hydraulic actuator 6 is movably connected to one end of the adjustable connecting block 3 via bolt B4, and the other end of the adjustable connecting block 3 is movably connected to the guide rod 5 via bolt A2. By adjusting the relative positions of bolt A2 and bolt B4, the distance between the guide rod 5 and the electro-hydraulic actuator 6 can be adjusted.

[0029] like Figure 1 As shown, the guide rod 5 passes through the guide sleeve 9 and is fixedly connected to the diamond shovel 10. The guide sleeve 9 is located between the raw coal bunker 1 and the unblocking chamber 12 and is fixedly connected to the inner wall of the unblocking chamber 12. When there is no coal blockage, the diamond shovel 10 can be retracted into the gap between the raw coal bunker 1 and the unblocking chamber 12, which does not affect the flowability of the raw coal and also avoids the mechanical parts from getting stuck.

[0030] In one embodiment of this utility model, the driving force of the electro-hydraulic push rod 6 is not less than 100kN and the piston rod stroke is not less than 1100mm. Even in the case of severe coal blockage, the electro-hydraulic push rod 6 can drive the diamond shovel 10 to effectively clear the blockage.

[0031] In one embodiment of this utility model, the electro-hydraulic push rod 6 is arranged parallel to the wall of the unblocking chamber 12, and the guide rod 5 is arranged parallel to the wall of the unblocking chamber 12, so that the rhomboid shovel 10 is always in contact with the inner wall of the unblocking chamber 12.

[0032] In one embodiment of this utility model, the coal inlet and coal outlet of the unblocking chamber 12 are both larger than the coal outlet of the raw coal chamber 1.

[0033] In one embodiment of this utility model, the rhomboid shovel 10 has an arc-shaped side that fits against the inner wall of the unblocking chamber 12, maximizing the effective working area. Driven by the electro-hydraulic push rod 6 and the guide rod 5, the rhomboid shovel 10 moves up and down along the inner wall of the unblocking chamber 12, disturbing the coal material at the arched point, reducing the internal frictional resistance of the coal material, and thus clearing the coal blockage.

[0034] In one embodiment of this utility model, the adjustable connecting block 3 is adjustable from 0-100mm, and the distance between the outer wall of the raw coal bunker 1 and the inner wall of the unblocking chamber 12 is 150mm. The adjustable connecting block 3 ensures that during the installation of this utility model, the distance between the guide rod 5 and the electro-hydraulic push rod 6 can be adjusted according to the actual site conditions.

[0035] In one embodiment of this utility model, the raw coal bunker anti-blockage electro-hydraulic coal pusher is used in conjunction with a coal shortage monitoring sensor.

[0036] In summary, the electro-hydraulic coal pusher for preventing blockage in raw coal bunkers of this utility model has the following advantages: simple structure, convenient operation, good unblocking effect, large working area, strong controllability, and safe and reliable operation. It eliminates the need for manual coal clearing, reduces labor intensity, reduces potential hazards in the coal conveying system, and ensures the safe and stable operation of the unit.

[0037] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A raw coal bunker anti-clogging electro-hydraulic coal pusher, characterized in that... It includes a double-layer split coal hopper and a hydraulic unblocking mechanism installed on the double-layer split coal hopper; The double-layer split coal hopper includes a raw coal bin (1), a blockage clearing bin (12), and a cover plate (7). The coal outlet of the raw coal bin (1) is located inside the coal inlet of the blockage clearing bin (12). The cover plate (7) is annular, and its inner and outer edges are movably connected to the raw coal bin (1) and the blockage clearing bin (12) by bolts, respectively. The hydraulic unblocking mechanism includes bolt A (2), adjustable connecting block (3), bolt B (4), guide rod (5), electro-hydraulic push rod (6), fixed seat A (8), fixed seat B (11), guide bushing (9), and diamond shovel (10). The electro-hydraulic push rod (6) is provided with a fixed seat A (8) and a fixed seat B (11), and is fixedly connected to the outer wall of the unblocking chamber (12) through the fixed seat A (8) and the fixed seat B (11); The piston rod of the electro-hydraulic actuator (6) is movably connected to one end of the adjustable connecting block (3) via bolt B (4), and the other end of the adjustable connecting block (3) is movably connected to the guide rod (5) via bolt A (2). The guide rod (5) passes through the guide bushing (9) and is fixedly connected to the diamond shovel (10). The guide bushing (9) is set between the raw coal bunker (1) and the unblocking bunker (12) and is fixedly connected to the inner wall of the unblocking bunker (12). The diamond-shaped shovel (10) has an arc-shaped side that fits against the inner wall of the unblocking chamber (12) and moves up and down along the inner wall of the unblocking chamber (12) under the drive of the electro-hydraulic push rod (6) and the guide rod (5).

2. The anti-clogging electro-hydraulic coal pusher for raw coal bunkers according to claim 1, characterized in that... The driving force of the electro-hydraulic actuator (6) is not less than 100kN, and the piston rod stroke is not less than 1100mm.

3. The anti-clogging electro-hydraulic coal pusher for raw coal bunkers according to claim 1, characterized in that... The electro-hydraulic actuator (6) is arranged parallel to the wall of the unblocking chamber (12), and the guide rod (5) is arranged parallel to the wall of the unblocking chamber (12).

4. The anti-clogging electro-hydraulic coal pusher for raw coal bunkers according to claim 1, characterized in that... The coal inlet and outlet of the unblocking bin (12) are both larger than the coal outlet of the raw coal bin (1).

5. The anti-clogging electro-hydraulic coal pusher for raw coal bunkers according to claim 1, characterized in that... The adjustable connecting block (3) is adjustable from 0 to 100 mm, and the distance between the outer wall of the raw coal bunker (1) and the inner wall of the unblocking bunker (12) is 150 mm.

6. The anti-clogging electro-hydraulic coal pusher for raw coal bunkers according to claim 1, characterized in that... The aforementioned anti-clogging electro-hydraulic coal pusher for raw coal bunkers is used in conjunction with a coal shortage monitoring sensor.

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