A dust prevention device for coal conveying system of thermal power plant

Abstract

The present invention belongs to the technical field of power plant production, and in particular, relates to a dust prevention device for a coal transportation system in a thermal power plant, comprising a base, a U-shaped machine cover fixedly provided on the upper end of the base, a plurality of conveying rollers rotatably provided inside the U-shaped machine cover, the plurality of conveying rollers are connected together by a belt drive, both ends of the roller wall of each conveying roller are jointly connected by a chain, the outer side walls of the two chains are fixed with a plurality of connecting rods, the rod ends of the two connecting rods on the same side are jointly fixed with a top rod, and the rod wall of each top rod is fixed with a first magnetic block. The present invention can utilize chain synchronous transmission, cooperate with magnetic attraction, generate negative pressure, so that the coal dust inside the U-shaped machine cover can be adsorbed and collected, and then the coal dust generated when the subsequent coal material is discharged can be reduced, the dust prevention effect is good, and the phenomenon of limited adsorption coverage, high cost, and difficult overhaul and maintenance of traditional fans is changed, and the phenomenon of coal dust escaping from the feed port can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of power plant production, and in particular relates to a dust prevention device for a coal conveying system of a thermal power plant. Background Art

[0002] A thermal power plant is a power plant that converts some form of raw energy into electrical energy for fixed facilities or transportation. Common power plants use coal as fuel and generate electricity through thermal energy. When transporting fuel coal from the storage warehouse to the next process, conveyor belts are generally used to transport the coal.

[0003] Since the raw coal contains a large amount of dust, when the coal is transported, due to reasons such as transportation vibration, dust will continuously escape from the conveyor belt. In order to reduce the escape of dust, the general practice is to install a shell cover on the conveyor belt to form a relatively closed environment to transport the coal. However, it cannot fundamentally reduce the coal dust. Coal dust is still easy to be discharged along with the coal at the coal discharge port. A dust collection system is also added, but the conveyor belt is long and the coverage of the dust collection system is limited. The dust collection system with a large coverage is relatively expensive and difficult to maintain and repair on a daily basis. Summary of the invention

[0004] The object of the present invention is to provide a dust prevention device for a coal conveying system of a thermal power plant in view of the above problems.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a dust prevention device for a coal conveying system in a thermal power plant, comprising a base, a U-shaped machine cover is fixedly provided on the upper end of the base, a plurality of conveying rollers are rotatably provided inside the U-shaped machine cover, the plurality of conveying rollers are connected together by a belt transmission, both ends of the roller wall of each conveying roller are commonly connected by a chain, the outer side walls of the two chains are fixed with a plurality of connecting rods, the rod ends of the two connecting rods on the same side are commonly fixed with a push rod, the rod wall of each push rod is fixed with a first magnetic suction block, a plurality of sealing sleeves are fixedly provided on the upper end of the base, a piston is slidably provided inside each sealing sleeve, and each A top cover is provided above the piston, and a fixing rod is commonly fixed between each of the top covers and the piston on the same side, a second magnetic block is fixedly provided on the end surface of each of the top covers, and a first spring is commonly fixedly provided between the lower end of each of the top covers and the base, a plurality of groups of adsorption tubes are inserted through the end surface of the base, and the two adsorption tubes in the same group are connected to the sealing sleeve on the same side, a plurality of groups of adsorption channels are provided on the side wall of the U-shaped hood, and the two adsorption channels in the same group are connected to the adsorption tube on the same side, a first one-way valve is provided inside each of the adsorption tubes, and air outlet pipes are fixed on both sides of the lower end of the side wall of each of the sealing sleeves, and a second one-way valve is provided inside the two air outlet pipes.

[0006] Preferably, a feed hopper is fixedly connected to the upper end of the U-shaped hood, airbag covers are fixedly provided on both sides of the inner wall of the feed hopper, and the side walls of the two airbag covers on the opposite sides are arranged against each other, and the side walls of the feed hopper located inside the airbag cover are fixedly connected with an intake pipe and an exhaust pipe, and a third one-way valve is provided inside the intake pipe and the exhaust pipe, hollow plates are fixed to the ends of the two intake pipes, feed ports are opened on the side walls of the two hollow plates on the opposite sides, and discharge pipes are fixedly connected to the lower ends of the two hollow plates.

[0007] Preferably, a plurality of groups of collecting cylinders are fixedly provided on the outer side wall of the U-shaped hood, and the side wall of each group of the collecting cylinders and the side wall of the adsorption channel on the same side are jointly provided with a discharge channel, and a separation net is fixedly provided on the lower side wall of each discharge channel, wherein a group of two collecting cylinders are connected to two discharge pipes on the same side.

[0008] Preferably, a second spring is fixedly provided between the inner wall of the feed hopper and the inner walls of the two airbag covers.

[0009] Preferably, dust filter covers are fixedly provided inside the two hollow plates at the positions of the two air inlet pipes.

[0010] Preferably, a discharge hopper is fixedly provided at the lower end of each collecting cylinder, and a sealing cover is threadedly connected to the lower end of the outer wall of each discharge hopper.

[0011] Compared with the existing technology, the advantages of a dust prevention device for the coal transportation system of a thermal power plant are:

[0012] 1. Through the cooperation of the provided base, U-shaped machine cover, multiple conveying rollers and belts, it can be used for coal transportation. Through the cooperation of the provided chain, connecting rod, top rod, first magnetic block, sealing sleeve, piston, top cover, fixed rod, second magnetic block, first spring, adsorption tube, adsorption channel and outlet pipe, the chain can be used for synchronous transmission and magnetic attraction to generate negative pressure, so that the coal dust inside the U-shaped machine cover can be adsorbed and collected, thereby reducing the coal dust generated during the subsequent coal discharge, with good dust prevention effect, and changing the phenomenon that the traditional fan has limited adsorption coverage, high cost and difficult maintenance.

[0013] 2. Through the cooperation of the feed hopper, air bag cover, air inlet pipe, exhaust pipe, hollow plate and discharge pipe, during feeding, the air bag cover can prevent the fallen coal dust from floating up and overflowing, and can generate negative pressure suction through extrusion, so that the coal dust at the feed hopper can be quickly adsorbed and collected, further improving the dust prevention effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a dust prevention device for a coal conveying system of a thermal power plant provided by the present invention;

[0015] Figure 2 It is a schematic diagram of the internal structure of a feed hopper of a dust prevention device for a coal conveying system of a thermal power plant provided by the present invention;

[0016] Figure 3 It is a structural enlarged diagram of part A of a dust prevention device for a coal conveying system of a thermal power plant provided by the present invention.

[0017] Description of reference numerals:

[0018] 1. Base; 2. U-shaped machine cover; 3. Conveyor roller; 4. Belt; 5. Chain; 6. Connecting rod; 7. Push rod; 8. First magnetic block; 9. Sealing sleeve; 10. Piston; 11. Top cover; 12. Fixing rod; 13. Second magnetic block; 14. First spring; 15. Adsorption tube; 16. Adsorption channel; 17. Exhaust pipe; 18. Feed hopper; 19. Airbag cover; 20. Inlet pipe; 21. Exhaust pipe; 22. Hollow plate; 23. Discharge pipe; 24. Collecting cylinder; 25. Discharge channel; 26. Separation net; 27. Second spring; 28. Dust filter cover; 29. ​​Discharge hopper. DETAILED DESCRIPTION

[0019] The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0020] like Figure 1-3As shown, a dust prevention device for a coal conveying system in a thermal power plant comprises a base 1, a U-shaped machine cover 2 is fixedly arranged on the upper end of the base 1, a plurality of conveying rollers 3 are rotatably arranged inside the U-shaped machine cover 2, the plurality of conveying rollers 3 are commonly connected by a belt 4, both ends of the roller wall of each conveying roller 3 are commonly connected by a chain 5, the outer side walls of the two chains 5 are fixed with a plurality of connecting rods 6, the rod ends of the two connecting rods 6 on the same side are commonly fixed with a push rod 7, the rod wall of each push rod 7 is fixed with a first magnetic block 8, a plurality of sealing sleeves 9 are fixedly arranged on the upper end of the base 1, a piston 10 is slidably arranged inside each sealing sleeve 9, a top cover 11 is arranged above each piston 10, a fixing rod 12 is commonly fixed between each top cover 11 and the piston 10 on the same side, a second magnetic block 13 is fixedly arranged on the end face of each top cover 11, and each top cover A first spring 14 is fixedly provided between the lower end of 11 and the base 1, a plurality of groups of adsorption tubes 15 are inserted into the end surface of the base 1, and the two adsorption tubes 15 in the same group are connected to the sealing sleeve 9 on the same side, a plurality of groups of adsorption channels 16 are provided on the side wall of the U-shaped hood 2, and the two adsorption channels 16 in the same group are connected to the adsorption tube 15 on the same side, a first one-way valve is provided inside each adsorption tube 15, an air outlet pipe 17 is fixed on both sides of the lower end of the side wall of each sealing sleeve 9, and a second one-way valve is provided inside the two air outlet pipes 17, wherein the side wall of the U-shaped hood 2 is provided with a driving member (not shown in the figure) for driving the transmission roller 3 to rotate, a sprocket (not shown in the figure) is provided on the transmission roller 3, and the sprocket can make the chain 5 form a wrap angle, and the chain 5 is driven by the sprocket for transmission, which are all existing mature technologies, so no further elaboration is made.

[0021] The upper end of the U-shaped hood 2 is fixedly connected with a feed hopper 18, and airbag covers 19 are fixedly provided on both sides of the inner wall of the feed hopper 18, and the side walls of the two airbag covers 19 facing each other are arranged in abutment with each other, and the side walls of the feed hopper 18 located inside the airbag cover 19 are fixedly connected with an intake pipe 20 and an exhaust pipe 21, and the intake pipe 20 and the exhaust pipe 21 are provided with a third one-way valve, and the ends of the two intake pipes 20 are fixed with hollow plates 22, and the side walls of the two hollow plates 22 facing each other are provided with feed ports, and the lower ends of the two hollow plates 22 are provided with a third one-way valve. A discharge pipe 23 is fixedly connected to each end, and the two airbag covers 19 are arranged in contact with each other. When coal is fed, the two airbag covers 19 will be squeezed due to gravity. At this time, the air inside the two airbag covers 19 is discharged through the exhaust pipe 21. After the coal is fed in, the two airbag covers 19 rebound and recover and contact again, so that the feed hopper 18 can be sealed to prevent coal dust from floating up and escaping. When the airbag cover 19 rebounds, the hollow plate 22 can generate negative pressure suction through the air inlet pipe 20, so that the coal dust generated during feeding can be sucked in.

[0022] A plurality of groups of collecting tubes 24 are fixedly provided on the outer side wall of the U-shaped hood 2. The side wall of each group of collecting tubes 24 and the side wall of the adsorption channel 16 on the same side are jointly provided with a discharge channel 25. A separation net 26 is fixedly provided on the lower side wall of each discharge channel 25. A group of two collecting tubes 24 are connected to two discharge pipes 23 on the same side. This arrangement facilitates the collection of the adsorbed coal dust and facilitates subsequent centralized discharge.

[0023] A second spring 27 is fixedly disposed between the inner wall of the feed hopper 18 and the inner walls of the two airbag covers 19 . This arrangement can assist the airbag covers 19 to rebound and recover quickly.

[0024] Dust filter covers 28 are fixedly provided at the positions of the two air inlet pipes 20 inside the two hollow plates 22. This arrangement can prevent coal dust from entering the airbag cover 19.

[0025] A discharge hopper 29 is fixedly provided at the lower end of each collecting barrel 24, and a sealing cover is threadedly connected to the lower end of the outer wall of each discharge hopper 29. This arrangement allows the collection barrel 24 to easily discharge coal dust.

[0026] The operating principle of the present invention is now described as follows: when the coal is transmitted through the belt 4, the two chains 5 are driven synchronously with the belt 4, so that multiple groups of connecting rods 6 can be used to drive multiple push rods 7 to move, and then when the first magnetic block 8 on the push rod 7 moves to the position of the second magnetic block 13, magnetic adsorption is used to cooperate with the fixed rod 12 to pull the piston 10 on the same side to move upward, so that negative pressure suction can be generated at the two adsorption channels 16 on the same side through the adsorption tube 15, so that the coal dust on this side can be adsorbed and collected, and thus the dust generated when the subsequent coal is discharged can be reduced. When the first magnetic block 8 moves away from the second magnetic block 13 on this side, under the action of the first spring 14, the top cover 11 on the same side can be pulled back to make the piston 10 move down and reset, and the air inside the sealing sleeve 9 is discharged through the exhaust pipe 17. When the next first magnetic block 8 moves to this point, negative pressure suction is generated again, and the use effect is good.

[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 substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A dust prevention device for a coal transportation system in a thermal power plant, characterized in that: The invention comprises a base (1), wherein a U-shaped machine cover (2) is fixedly provided at the upper end of the base (1), a plurality of conveying rollers (3) are rotatably provided inside the U-shaped machine cover (2), the plurality of conveying rollers (3) are commonly connected by a belt (4), both ends of the roller wall of each conveying roller (3) are commonly connected by a chain (5), the outer side walls of the two chains (5) are fixedly provided with a plurality of connecting rods (6), the rod ends of the two connecting rods (6) on the same side are commonly fixedly provided with a push rod (7), the rod wall of each push rod (7) is fixedly provided with a first magnetic block (8), the upper end of the base (1) is fixedly provided with a plurality of sealing sleeves (9), the interior of each sealing sleeve (9) is slidably provided with a piston (10), and the upper end of each piston (10) is provided with a plurality of sealing sleeves (9). Each side is provided with a top cover (11), a fixing rod (12) is fixedly provided between each of the top covers (11) and the piston (10) on the same side, a second magnetic block (13) is fixedly provided on the end surface of each of the top covers (11), a first spring (14) is fixedly provided between the lower end of each of the top covers (11) and the base (1), a plurality of groups of adsorption tubes (15) are inserted through the end surface of the base (1), and the two adsorption tubes (15) in the same group are connected to the sealing sleeve (9) on the same side, a plurality of groups of adsorption channels (16) are provided on the side wall of the U-shaped hood (2), and the two adsorption channels (16) in the same group are connected to the adsorption tube (15) on the same side, and an air outlet pipe (17) is fixedly provided on both sides of the lower end of the side wall of each of the sealing sleeves (9).

2. A dust prevention device for a coal handling system in a thermal power plant according to claim 1, characterized in that: A first one-way valve is provided inside each of the adsorption tubes (15), and a second one-way valve is provided inside each of the two air outlet pipes (17).

3. A dust prevention device for a coal handling system in a thermal power plant according to claim 2, characterized in that: A feed hopper (18) is fixedly connected to the upper end of the U-shaped hood (2), and airbag covers (19) are fixedly provided on both sides of the inner wall of the feed hopper (18), and the side walls of the two airbag covers (19) facing each other are arranged in abutment with each other. An intake pipe (20) and an exhaust pipe (21) are fixedly connected to the side walls of the feed hopper (18) located inside the airbag cover (19), and hollow plates (22) are fixed to the ends of the two intake pipes (20), and feed ports are provided on the side walls of the two hollow plates (22) facing each other, and discharge pipes (23) are fixedly connected to the lower ends of the two hollow plates (22).

4. A dust prevention device for a coal handling system in a thermal power plant according to claim 3, characterized in that: A third one-way valve is provided inside the air inlet pipe (20) and the air outlet pipe (21).

5. A dust prevention device for a coal transportation system in a thermal power plant according to claim 3, characterized in that: A second spring (27) is fixedly disposed between the inner wall of the feed hopper (18) and the inner walls of the two airbag covers (19).

6. A dust prevention device for a coal handling system in a thermal power plant according to claim 3, characterized in that: Dust filter covers (28) are fixedly provided inside the two hollow plates (22) at the positions of the two air inlet pipes (20).

7. A dust prevention device for a coal handling system in a thermal power plant according to claim 3, characterized in that: A plurality of groups of collecting tubes (24) are fixedly provided on the outer side wall of the U-shaped hood (2), and the side wall of each group of the collecting tubes (24) and the side wall of the adsorption channel (16) on the same side are provided with a discharge channel (25), wherein a group of two collecting tubes (24) are connected to two discharge pipes (23) on the same side.

8. A dust prevention device for a coal handling system in a thermal power plant according to claim 7, characterized in that: A separation net (26) is fixedly provided on the lower side wall of each of the discharge channels (25).

9. A dust prevention device for a coal handling system in a thermal power plant according to claim 7, characterized in that: A discharge hopper (29) is fixedly provided at the lower end of each collecting cylinder (24).

10. A dust prevention device for a coal handling system in a thermal power plant according to claim 9, characterized in that: The lower end of the outer wall of each discharge hopper (29) is threadedly connected with a sealing cover.

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