Shrimp hyperbolic coal bunker mutual transmission device

Abstract

The utility model relates to the technical field of coal hopper material conveying, and discloses a shrimp hyperbolic coal bunker mutual conveying device which is arranged between two adjacent raw coal hoppers and comprises a transversely arranged belt conveyor and two shrimp hyperbolic coal bunker branches arranged at the top of the belt conveyor. The top ends of the two mitre hyperbolic coal bunker branches are connected and communicated with the side walls of the two adjacent raw coal buckets correspondingly, mitre hyperbolic coal bunker main roads are arranged at the bottom ends of the two adjacent raw coal buckets correspondingly, and the bottom ends of the mitre hyperbolic coal bunker main roads are connected with coal feeders. And the two ends of the bottom of the belt conveyor are respectively connected and communicated with the coal feeders at the bottom ends of the two shrimp hyperbolic coal bunker main paths. According to the utility model, main and branch paths of the shrimp hyperbolic coal bunker are fully utilized to reasonably distribute and blend coal, the resistance between the inner wall and raw coal is reduced, the smoothness is ensured, in addition, the coal interruption signal generator can drive the pneumatic rapping device to work, the coal flow is continuously kept smooth by rapping and blocking, the loosening efficiency is high, and the safety is better ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of coal bunker material transportation, and more specifically, to a mutual transmission device for a shrimp-shaped hyperbolic coal bunker. Background Art

[0002] With the rise of photovoltaic and wind power in China, the grid load will be greatly impacted by the grid connection of photovoltaic and wind power during the day. This requires thermal power plants to have the ability of wide-range peak regulation to meet the needs of the power market. The coal feeding system of power plants is an important system for boiler energy supply. It conveys raw coal to the raw coal bunker through a belt and then supplies it to the boiler for combustion through a coal dropping pipe and a coal feeder. The raw coal dug from the ground usually has a water content of 8%-16%. After being stored outdoors and exposed to rain many times, the surface moisture of the coal is relatively large. Therefore, it is very easy to occur arching, bridging, and coal blockage after entering the raw coal bunker. In addition, in Northeast China, the winter temperature can reach below -30°C. After the raw coal enters the coal bunker, it will form lumps due to frost thawing. If lumping often occurs in the coal bunker, it will cause arching and coal blockage. Generally, the arching position is at the junction of the raw coal bunker and the coal dropping pipe, resulting in more serious bridging and blockage problems.

[0003] Currently, the conventional technology for changing the diameter from a large-diameter coal inlet to a small-diameter coal outlet at home and abroad usually adopts an activated wedge-shaped coal bunker plus a vibrator or an inverted frustum-shaped coal bunker plus an air cannon technology. The wall of the activated wedge-shaped coal bunker is spliced by multiple flat plates, so there are multiple hard bends and variable-diameter gentle slopes at the joints, which directly affects the flow of raw coal with a large moisture content and cannot achieve the purpose of smooth dredging. Although the inverted frustum-shaped coal bunker solves the hard bends and variable-diameter gentle slopes of the coal bunker, due to the shape of the inverted frustum-shaped coal bunker being a uniform-diameter contraction, the focus of the contradiction is directly concentrated at the outlet of the coal bunker. Therefore, coal flow blockage often occurs at the outlet of the coal bunker.

[0004] The existing technology forms a certain obstruction to the coal dropping pipe of the raw coal bunker and the coal flow, resulting in ineffective circulation of blocked coal. At present, in major power stations and production enterprises in China, if material blockage occurs during the flow in the supply device, most of the reasons are due to the existence of friction dead corners during the process of the device diameter changing from large to small. After this situation occurs, the staff can only use an iron hammer to manually knock and a hollow cannon to loosen the blocked coal, but the loosening efficiency is low, resulting in the coal quantity entering the boiler not reaching the standard. In severe cases, it causes material interruption, thus resulting in production suspension accidents. Content of the Utility Model

[0005] To overcome the above defects, the utility model provides a mutual transmission device for a shrimp-shaped hyperbolic coal bunker, which can make the coal types mutually communicated and exchanged between adjacent coal bunkers, flexibly distribute coal, has a simple structure, is convenient to operate, can make the material flow resistance smaller, better ensure the unobstructed material flow, has a high loosening efficiency, and at the same time better ensure safety and is more practical.

[0006] To achieve the above object, the utility model provides a mutual transmission device for a shrimp-shaped hyperbolic coal bunker, which is arranged between two adjacent raw coal bunkers. It includes a horizontally arranged belt conveyor and two shrimp-shaped hyperbolic coal bunker branch roads arranged on the top of the belt conveyor. The tops of the two shrimp-shaped hyperbolic coal bunker branch roads are respectively connected and communicated with the side walls of two adjacent raw coal bunkers. The bottoms of the two adjacent raw coal bunkers are both provided with shrimp-shaped hyperbolic coal bunker main roads. The bottom end of the shrimp-shaped hyperbolic coal bunker main road is connected to a coal feeder. The two ends at the bottom of the belt conveyor are respectively connected and communicated with the coal feeders at the bottom ends of the two shrimp-shaped hyperbolic coal bunker main roads.

[0007] Preferably, a coal discharging hole is arranged in the lower part of the side wall of the shrimp-shaped hyperbolic coal bunker branch road. The coal discharging hole is provided with a first cover plate, and a first transition guide plate connected to the first cover plate is arranged in the coal discharging hole. A coal poking pipe is arranged in the lower part of the side wall of the shrimp-shaped hyperbolic coal bunker branch road. The free end of the coal poking pipe is arranged to incline upward and is provided with a second cover plate, and a second transition guide plate connected to the second cover plate is arranged in the coal poking pipe.

[0008] Preferably, a pneumatic double-sided plug door is connected to the bottom end of the shrimp-shaped hyperbolic coal bunker branch road through a connecting flange. A double-sealing component is arranged inside the pneumatic double-sided plug door to prevent coal powder from leaking. Cylinders are arranged on both sides of the pneumatic double-sided plug door. The cylinders are telescopically connected with a plug plate, and the opening and closing of the pneumatic double-sided plug door are controlled by driving the plug plate with the cylinders at both ends.

[0009] Preferably, a coal break signal generator is arranged on the top of the coal feeder, and the coal break signal generator is electrically connected to a pneumatic vibrator.

[0010] Preferably, a coal discharging hole is arranged in the lower part of the side wall of the shrimp-shaped hyperbolic coal bunker main road. The coal discharging hole is provided with a first cover plate, and a first transition guide plate connected to the first cover plate is arranged in the coal discharging hole. A coal poking pipe is arranged in the lower part of the side wall of the shrimp-shaped hyperbolic coal bunker main road. The free end of the coal poking pipe is arranged to incline upward and is provided with a second cover plate, and a second transition guide plate connected to the second cover plate is arranged in the coal poking pipe.

[0011] Preferably, a pneumatic double-sided plug door is connected to the bottom end of the shrimp-shaped hyperbolic coal bunker main road through a connecting flange. A double-sealing component is arranged inside the pneumatic double-sided plug door to prevent coal powder from leaking. Cylinders are arranged on both sides of the pneumatic double-sided plug door. The cylinders are telescopically connected with a plug plate, and the opening and closing of the pneumatic double-sided plug door are controlled by driving the plug plate with the cylinders at both ends.

[0012] Preferably, a metal compensator is flange-connected to the bottom end of the pneumatic double-sided plug door. After the shrimp-shaped hyperbolic coal bunker main road is sequentially connected with the pneumatic double-sided plug door and the metal compensator, it is connected to the coal feeder. After the shrimp-shaped hyperbolic coal bunker branch road is sequentially connected with the pneumatic double-sided plug door and the metal compensator, it is connected to the belt conveyor.

[0013] Preferably, the upper opening of the main path of the shrimp-shaped hyperbolic coal bunker abuts against the outer wall of the lower opening of the raw coal bunker, and is used to completely cover the lower opening of the raw coal bunker.

[0014] Preferably, a plurality of pneumatic vibrators are provided on the side wall of the main path of the shrimp-shaped hyperbolic coal bunker, and the plurality of pneumatic vibrators are connected with an energy accumulator.

[0015] It can be seen from the above technical solutions that, compared with the prior art, the shrimp-shaped hyperbolic coal bunker mutual transmission device disclosed by the present invention, in accordance with the principle of equal cross-sectional area contraction, has no dead angle when the coal flow circulates in the coal dropping pipe, the flow resistance is uniformly reduced, the resistance between the inner wall and the raw coal is reduced, ensuring unobstructed flow. Even when a coal flow blockage occurs, the coal break signal generator can also drive the pneumatic vibrator to work, vibrating and unblocking to keep the coal flow unobstructed, with high loosening efficiency, better ensuring safety, enabling the material to achieve effective circulation, and making full use of the main and branch paths of the shrimp-shaped hyperbolic coal bunker for reasonable coal distribution and coal blending work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0017] Figure 1 It is a structural schematic diagram of the shrimp-shaped hyperbolic coal bunker mutual transmission device of the present invention.

[0018] Figure 2 It is a structural schematic diagram after the shrimp-shaped hyperbolic coal bunker mutual transmission device of the present invention is installed with a coal feeder.

[0019] In the figure, 1, raw coal bunker; 2, main path of the shrimp-shaped hyperbolic coal bunker; 3, pneumatic vibrator; 4, energy accumulator; 5, coal discharge hole; 6, coal poking pipe; 7, connecting flange; 8, pneumatic two-way flap gate; 9, metal compensator; 10, coal feeder; 11, branch path of the shrimp-shaped hyperbolic coal bunker; 12, coal break signal generator; 13, belt conveyor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to the attached Figure 1-2 , which is a mutual transmission device for a shrimp-shaped hyperbolic coal bunker disclosed by the present utility model.

[0022] The mutual transmission device for a shrimp-shaped hyperbolic coal bunker provided by the present utility model is arranged between two adjacent raw coal hoppers 1, and includes a horizontally arranged belt conveyor 13 and two shrimp-shaped hyperbolic coal bunker branch paths 11 arranged on the top of the belt conveyor 13. The tops of the two shrimp-shaped hyperbolic coal bunker branch paths 11 are respectively connected to the side walls of the two adjacent raw coal hoppers 1. The bottoms of the two adjacent raw coal hoppers 1 are both provided with a shrimp-shaped hyperbolic coal bunker main path 2. The bottom end of the shrimp-shaped hyperbolic coal bunker main path 2 is connected to a coal feeder 10. The two ends of the bottom of the belt conveyor 13 are respectively connected to the coal feeders 10 at the bottom ends of the two shrimp-shaped hyperbolic coal bunker main paths 2.

[0023] It should be noted that the shrimp-shaped hyperbolic coal bunker main path 2 and the shrimp-shaped hyperbolic coal bunker branch path 11 are cylindrical bodies with upper and lower openings. The cylindrical body is a gradually shrinking curve with an equal circular cross-sectional area. The streamline of the entire cylindrical body is smoothly transitioned without dead ends, which can achieve effective fluidity and avoid scraping and hanging phenomena. The size of the feeding port is determined according to the structure of the raw coal bunker, and the characteristics of the discharging port and the structure of the feeding pipe are determined according to the coal feeder. The lower opening diameter of the mutual transmission device (main and branch paths) of the shrimp-shaped hyperbolic coal bunker is between 600 - 900 mm. The upper opening of the shrimp-shaped hyperbolic coal bunker main path 2 is covered on the outer side wall of the lower opening of the raw coal hopper 1, and the upper end of the shrimp-shaped hyperbolic coal bunker main path 2 abuts against the lower outer wall of the raw coal hopper 1, so as to provide a complete overall covering function for the shrimp-shaped hyperbolic coal bunker main path 2 and effectively avoid the scattering of materials.

[0024] Analyze the reasons for material bridging and blockage. The material particle size, surface temperature, type of the feeder 10, structure type of the bunker, specific position of material bridging and blockage. Generally, the bridging and blockage positions are at the junction of the bunker and the feeding pipe. Here, the flow area is the smallest, the material is subjected to the greatest extrusion pressure, and there is the greatest friction and strong adhesion between the materials. After the materials are extruded, they stick together to form an arch and caking phenomenon. Another is that due to the slow freezing of materials in winter, the materials agglomerate above the feeder, making the belt of the feeder 10 unable to carry the materials away, resulting in jamming. Therefore, the structural shapes of the shrimp-shaped hyperbolic coal bunker main path 2 and the shrimp-shaped hyperbolic coal bunker branch path 11 are similar to the shape of a shrimp segment, and each circular segment forms a shrimp-shaped curve coal hopper. This kind of structure evidences and increases the material flow, avoiding material bridging and blockage.

[0025] On the side wall of the main road 2 of the described shrimp hyperbolic coal bunker, several pneumatic vibrators 3 are provided, and the pneumatic vibrators 3 are connected to an energy storage device 4. On the lower parts of the side walls of the main road 2 of the described shrimp hyperbolic coal bunker and the branch road 11 of the shrimp hyperbolic coal bunker, coal discharge holes 5 are provided. The coal discharge holes 5 are provided with first covers, and first transition guides connected to the first covers are arranged inside the coal discharge holes 5. On the lower parts of the side walls of the main road 2 of the shrimp hyperbolic coal bunker and the branch road 11 of the shrimp hyperbolic coal bunker, coal poking pipes 6 are provided. The free ends of the coal poking pipes 6 are inclined upward and are provided with second covers, and second transition guides connected to the second covers are arranged inside the coal poking pipes 6.

[0026] It should be noted that the energy storage device 4 is connected to multiple pneumatic vibrators 3 to store energy. The energy storage device 4 is connected to a high-pressure air source through a compressed air main pipe to distribute high-pressure gas to each pneumatic vibrator through the energy storage device. The first cover of the coal discharge hole 5 can be quickly opened and closed. The first transition guide inside the coal discharge hole 5 is connected to the first cover, which is convenient for timely coal discharge and provides a further manual dredging function, and can provide a further supplement for circuit failure. The second cover of the coal poking pipe 6 can also be quickly opened and closed. The second transition guide is arranged inside the coal poking pipe 6 and is connected to the second cover, which is convenient for timely coal poking and provides a further manual dredging function, and can provide a further supplement for circuit failure.

[0027] At the bottom ends of the main road 2 of the shrimp hyperbolic coal bunker and the branch road 11 of the shrimp hyperbolic coal bunker, pneumatic double-sided plug valves 8 are respectively connected through connecting flanges 7, which play the function of controlling the closing and opening of the coal hopper at any time. A double-sealing component is arranged inside the pneumatic double-sided plug valve 8 to prevent coal powder from leaking. Cylinders are arranged on both sides of the pneumatic double-sided plug valve 8, and the cylinders are telescopically connected to a plug plate, and the opening and closing of the pneumatic double-sided plug valve 8 are controlled by driving the plug plate through the cylinders at both ends.

[0028] The bottom end flange of the pneumatic double-sided plug valve 8 is connected to a metal compensator 9. Among them, the metal compensator 9 can be a layer-inserted metal compensator or a corrugated metal compensator, which can compensate for the length compensation of the coal hopper size caused by temperature changes at any time. The main road 2 of the shrimp hyperbolic coal bunker is connected to a coal feeder after connecting the pneumatic double-sided plug valve 8 and the metal compensator 9 in sequence. The branch road 11 of the shrimp hyperbolic coal bunker is connected to a belt conveyor 13 after connecting the pneumatic double-sided plug valve 8 and the metal compensator 9 in sequence. It can not only play a role in auxiliary dredging of the branch road when a fault occurs in the main road 2 of the shrimp hyperbolic coal bunker, reduce the material pressure of the main road, and make the main road unobstructed; but also replace the main road output when the main road fails, and can also play a role in flexible ratio between adjacent two groups of coal hoppers.

[0029] A coal break signal generator 12 is arranged on the top of the coal feeder 10, and the coal break signal generator 12 is electrically connected to the pneumatic vibrator 3.

[0030] It should be noted that a plurality of pneumatic vibrators 3 for vibrating and hitting the main road 2 of the shrimp hyperbolic coal bunker are provided at the outer side of the middle part of the main road 2 of the shrimp hyperbolic coal bunker, and are arranged at intervals up and down and staggered. A coal break signal generator 12 is installed in the feed pipe of the coal feeder 10. The coal break signal generator 12 is electrically connected to the pneumatic vibrator 3. The coal break signal generator 12 provides a coal break signal to control the pneumatic vibrator 3 to vibrate and dredge. The specific principle is as follows: when the coal break signal generator 12 sends out a coal break signal, the pneumatic vibrator 3 vibrates until the coal flow is smooth, and then the coal break signal returns to normal and the vibration stops. If the coal break signal does not recover, the pneumatic vibrator 3 continues to work reciprocally until the coal break signal returns to normal. The branch road 11 of the shrimp hyperbolic coal bunker can not only help to dredge the material in the main road when a fault occurs in the main road 2 of the shrimp hyperbolic coal bunker, reduce the material pressure in the main road and realize the smoothness of the main road, but also replace the main road output when the main road fails, and can also play a role in flexible ratio between adjacent two groups of coal hoppers. The above functions are also possessed by the branch road 11 of the shrimp hyperbolic coal bunker. At the same time, the branch road 11 of the shrimp hyperbolic coal bunker is connected to the upper interface of the belt conveyor 13 through the same pneumatic two-way plug door 8 and metal compensator 9. The lower outlet of the belt conveyor 13 is connected to the bypass inlet of the coal feeder 10 of the adjacent coal hopper. Similarly, the bypasses of the adjacent coal hoppers are also connected to the coal feeder 10 of this equipment in the same way to realize the intercommunication and mutual use between the two groups of coal hoppers.

[0031] In summary, the cylinder of the mutual transmission device of the shrimp hyperbolic coal bunker of the present utility model is reasonably designed, with a linear and smooth flow without dead corners, small resistance to coal flow, and can timely feedback and issue a cleaning instruction in the case of coal flow interruption, quickly restore the coal flow supply, and the restoration rate is above 99%. It has a wide range of applications and can effectively circulate various materials, with very high practicality.

[0032] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A shrimp hyperbolic coal bunker mutual transmission device, arranged between two adjacent raw coal hoppers (1), characterized in that: It comprises a horizontally placed belt conveyor (13) and two shrimp hyperbolic coal bunker branches (11) arranged on the top of the belt conveyor (13), the tops of the two shrimp hyperbolic coal bunker branches (11) are respectively connected to and communicated with the side walls of two adjacent raw coal hoppers (1), the bottoms of the two adjacent raw coal hoppers (1) are both provided with shrimp hyperbolic coal bunker main roads (2), the bottoms of the shrimp hyperbolic coal bunker main roads (2) are connected to a coal feeder (10), and the two ends of the bottom of the belt conveyor (13) are respectively connected to and communicated with the coal feeders (10) at the bottoms of the two shrimp hyperbolic coal bunker main roads (2).

2. The shrimp hyperbolic coal bunker mutual transmission device according to claim 1 is characterized in that: A coal discharge hole (5) is provided at the lower part of the side wall of the shrimp hyperbolic coal bunker branch (11), the coal discharge hole (5) is provided with a first cover plate, and a first transition guide plate connected to the first cover plate is provided in the coal discharge hole (5); A coal-poking pipe (6) is provided at the lower part of the side wall of the shrimp hyperbolic coal bunker branch (11), the free end of the coal-poking pipe (6) is arranged to be inclined upward and is provided with a second cover plate, and a second transition guide plate connected to the second cover plate is provided inside the coal-poking pipe (6).

3. The shrimp hyperbolic coal bunker mutual transmission device according to claim 1 is characterized in that: The bottom end of the shrimp hyperbolic coal bin branch (11) is connected to a pneumatic two-way gate (8) via a connecting flange (7). A double sealing assembly is provided inside the pneumatic two-way gate (8) to prevent coal powder from leaking out. Cylinders are provided on both sides of the pneumatic two-way gate (8). The cylinders are telescopically connected to gates, and the gates are driven by the cylinders at both ends to control the opening and closing of the pneumatic two-way gate (8).

4. The shrimp hyperbolic coal bunker mutual transmission device according to claim 1 is characterized in that: A coal cut-off signal generator (12) is provided on the top of the coal feeder (10), and the coal cut-off signal generator (12) is electrically connected to the pneumatic rapper (3).

5. The shrimp hyperbolic coal bunker mutual transmission device according to claim 1 is characterized in that: A coal discharge hole (5) is provided at the lower part of the side wall of the main road (2) of the shrimp hyperbolic coal bunker, the coal discharge hole (5) is provided with a first cover plate, and a first transition guide plate connected to the first cover plate is provided in the coal discharge hole (5); A coal-poking pipe (6) is provided at the lower part of the side wall of the main road (2) of the shrimp hyperbolic coal bunker, the free end of the coal-poking pipe (6) is arranged to be inclined upward and is provided with a second cover plate, and a second transition guide plate connected to the second cover plate is provided inside the coal-poking pipe (6).

6. The shrimp hyperbolic coal bunker mutual transmission device according to claim 1 is characterized in that: The bottom end of the main road (2) of the shrimp hyperbolic coal bunker is connected to a pneumatic two-way gate (8) via a connecting flange (7). A double sealing assembly is provided inside the pneumatic two-way gate (8) to prevent coal powder from leaking out. Cylinders are provided on both sides of the pneumatic two-way gate (8). The cylinders are telescopically connected to gates, and the gates are driven by the cylinders at both ends to control the opening and closing of the pneumatic two-way gate (8).

7. The shrimp hyperbolic coal bunker mutual transmission device according to claim 3 or 6, characterized in that: The bottom flange of the pneumatic two-way gate (8) is connected to a metal compensator (9); the main path (2) of the Shrimp Hyperbolic Coal Bunker is connected to the pneumatic two-way gate (8) and the metal compensator (9) in sequence and then connected to a coal feeder (10); the branch path (11) of the Shrimp Hyperbolic Coal Bunker is connected to the pneumatic two-way gate (8) and the metal compensator (9) in sequence and then connected to a belt conveyor (13).

8. The shrimp hyperbolic coal bunker mutual transmission device according to claim 1 is characterized in that: The upper opening of the shrimp hyperbolic coal bunker main road (2) is against the outer wall of the lower opening of the raw coal hopper (1), so as to completely cover the lower opening of the raw coal hopper (1).

9. The shrimp hyperbolic coal bunker mutual transmission device according to claim 1 is characterized in that: The side walls of the shrimp hyperbolic coal bunker main road (2) are provided with a plurality of pneumatic rappers (3), and the plurality of pneumatic rappers (3) are connected to energy storage devices (4).

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