Dust-proof coal conveying device for thermal power plants

Abstract

The present application provides a dust-proof coal conveying device for a thermal power plant, which belongs to the technical field of dust-proof conveying equipment. The dust-proof coal conveying device for a thermal power plant comprises a conveyor; a variable dust cover mechanism, which is movably arranged on the frames on both sides of the conveyor belt of the conveyor, the variable dust cover mechanism comprises a walking support assembly, a driving assembly, a driven support assembly, a variable support assembly and a pleated curtain cover, and the pleated curtain cover is arranged between every two of the variable support assemblies. The present application is convenient for being movably and detachably arranged and used on the coal yard conveyor of the thermal power plant, and is convenient for telescopic expansion on the belt conveyor, and the span on both sides can also be adaptively expanded. The same model can be applicable to conveyors of different models within a certain range, which is convenient for exposing and sealing the conveyor, significantly reducing the dust-proof cost of the coal conveyor of the thermal power plant, and is also convenient for maintenance.

Description

Technical Field

[0001] The present application relates to the technical field of dust-proof conveying equipment, and in particular to a dust-proof coal conveying device for a thermal power plant. Background Art

[0002] Coal is one of the most commonly used fuels in thermal power plants. Thermal power plants generally have special coal yards for stacking and unloading coal resources. Special conveying equipment is needed to transport coal from the coal yard to the coal hopper, and then send it to the coal mill through the coal hopper to be ground into coal powder. Then, hot air carries the coal powder through the exhaust fan and sends it into the furnace of the boiler for combustion to generate electricity. Dust will inevitably be generated during the transportation of coal. The main component of dust is coal dust, which is rich in combustible coal fine particles. Due to its small size and light weight, it can penetrate everywhere in the coal yard and enter machinery and equipment, reducing the service life of the equipment and visibility in the workplace. Its flammability will undoubtedly increase the risk factor of the operation. Therefore, it is a very necessary safety production measure to prevent and control the dust generated during the transportation of coal in the coal yard of thermal power plants.

[0003] At present, belt conveyors are mainly used to transport coal in coal yards of thermal power plants. Generally, conveyor sealing dust covers are used to protect the space above and around the movable conveyor belt of the conveyor, which can effectively prevent the spread of coal dust. However, the manufacturing cost is high and the model is relatively fixed. Different types of conveyors need to be specially designed and often need to be customized. Since the sealing dust covers of existing coal conveyors are mostly fixed structures, fixed installation methods are also mostly used. When the conveyor structure needs to be cleaned or maintained, it is also necessary to shut down and disassemble it. The operation is complicated and time-consuming, which not only seriously affects the continuity and efficiency of the transportation operation, but also makes it difficult to ensure the continuous and stable working state of the coal conveyor, and directly leads to high maintenance costs of the conveyor. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a dust-proof coal conveying device for a thermal power plant, which is easy to be moved and disassembled for use, can be retracted on the belt conveyor, and the spans on both sides can also be adaptively expanded. The same model can be applied to conveyors of different models within a certain range, significantly reducing the dust-proof cost of the coal conveyor of the thermal power plant and facilitating maintenance.

[0005] This application is implemented as follows:

[0006] The present application provides a dust-proof coal conveying device for a thermal power plant, comprising

[0007] Conveyors;

[0008] A variable dust cover mechanism, the variable dust cover mechanism includes a walking support assembly, a driving assembly, a driven support assembly, a variable support assembly and a pleated curtain cover, the two walking support assemblies are symmetrically arranged in parallel on the frames on both sides of the conveyor belt of the conveyor, the two groups of driving assemblies are symmetrically arranged at the two ends of the two walking support assemblies, a plurality of driven support assemblies are evenly symmetrically and movably arranged on the two walking support assemblies, one variable support assembly is arranged on every two corresponding driven support assemblies, one variable support assembly is also arranged on the two corresponding driving assemblies at the same end of the two walking support assemblies, and the pleated curtain cover is arranged between every two variable support assemblies.

[0009] In one embodiment of the present application, the walking support assembly includes a main rail and a secondary rail, the main rail is arranged on a frame outside the conveyor belt of the conveyor, and the secondary rail is arranged outside the main rail, the upper end of the secondary rail is flush with the upper end of the main rail, and the lower end of the secondary rail is shorter than the lower end of the main rail.

[0010] In one embodiment of the present application, a plurality of through holes and a plurality of slot holes are evenly and alternately formed on the main rail.

[0011] In one embodiment of the present application, the driving assembly includes a shell, a roller, a servo motor and a sprocket chain group, the two rollers are arranged in parallel to rotate inside the shell, the servo motor is arranged on the outside of the outer end of the shell, and the servo motor is connected to one of the rollers through the sprocket chain group; the roller is rotatably arranged in the main rail, and the outer end of the wheel axle of one of the rollers rotates and passes through the outside of the shell.

[0012] In one embodiment of the present application, an electromagnetic lock is disposed inside the shell at one end away from the servo motor; a first limiting wheel group is disposed outside the shell, and the first limiting wheel group is movably clamped on the auxiliary rail.

[0013] In one embodiment of the present application, a plugging plate is provided at one end of the shell away from the servo motor, a brush plate is provided on the outside of the plugging plate, a brush head is provided at the end of the brush plate, and the brush head is attached to the bottom side of the main rail.

[0014] In one embodiment of the present application, the driven support assembly includes a rolling platform and a second limiting wheel group, the rolling platform is movably arranged on the main rail, two second limiting wheel groups are symmetrically arranged on the outside of the rolling platform, and the second limiting wheel group can also be movably clamped on the auxiliary rail.

[0015] In one embodiment of the present application, the variable support assembly includes two first keels, two second keels and two electric push rods, and the two first keels, two second keels and two electric push rods are symmetrically arranged, the lower end of the first keel is rotatably connected to the upper side of the brush plate and the upper side of the rolling platform, the lower end of the electric push rod is rotatably connected to the outer side of the brush plate and the outer side of the rolling platform, the upper end of the output end of the electric push rod is rotatably connected to the outer side of the first keel, the lower end of the second keel is rotatably connected to the upper end of the first keel, and the upper end of one second keel is rotatably connected to the upper end of another second keel.

[0016] In one embodiment of the present application, a synchronization component is also arranged between the main rail and the auxiliary rail, and the synchronization component includes a rack and a gear, the rack is fixedly arranged on the outside of the main rail, the gear is arranged on the outer end of the wheel axle of one of the rollers, and the two gears on one of the racks are respectively meshed with one of the racks.

[0017] In one embodiment of the present application, the dust-proof coal conveying device for a thermal power plant further includes:

[0018] The variable spray dust suppression mechanism is movably arranged under the two second keels.

[0019] In one embodiment of the present application, the variable spray dust suppression mechanism includes a variable bracket, an electric slip ring, an input assembly, a third connecting ring and a nozzle, the two ends of the variable bracket are respectively rotatably connected to the lower sides of the two second keels, the electric slip ring and the third connecting ring are respectively arranged on the upper and lower sides of the lower movable end of the variable bracket, the upper end of the nozzle rotates and passes through the middle of the third connecting ring, the upper end of the input assembly rotates and passes through the upper movable end of the variable bracket, and the lower end of the input assembly passes through the middle of the electric slip ring and is respectively transmission-connected to the electric slip ring and the nozzle.

[0020] In one embodiment of the present application, the variable bracket includes two first links, two second links, a first connecting ring and a second connecting ring. The two first links are symmetrically arranged, the first connecting ring is arranged between the lower ends of the two first links, and the upper end and lower end of the first link are respectively rotatably connected to the lower side of the second keel and the one side of the first connecting ring; the two second links are also symmetrically arranged, the second connecting ring is arranged between the upper ends of the two second links, and the upper end and lower end of the second link are respectively rotatably connected to the one side of the second connecting ring and the upper side of the first link.

[0021] In one embodiment of the present application, the electric slip ring and the third connecting ring are respectively arranged on the upper side and the lower side of the first connecting ring, and a plurality of first sliding keys are evenly arranged on the inner circumference of the rotor of the electric slip ring.

[0022] In one embodiment of the present application, the input component includes a straight tube, a connecting column and a second sliding key. The straight tube is fixedly inserted into the connecting column. A plurality of first key grooves are evenly arranged on the circumference of the connecting column. The first sliding key is slidably arranged in the first key grooves. A plurality of second sliding keys are evenly arranged on the lower side of the connecting column. A sealing ring is arranged on the outer edge of the lower end of the straight tube, and the lower end of the straight tube slides through the interior of the nozzle.

[0023] In one embodiment of the present application, a plurality of nozzles are evenly arranged on the outside of the nozzle, a plurality of second key grooves are evenly opened around the nozzle, the second sliding key is slidably arranged in the second key groove, and a limiting head is arranged on the outside of the lower end of the second sliding key; the upper end of the straight tube rotates through the inside of the second connecting ring through a bearing; a rotary joint is arranged on the upper end of the straight tube, one side of the input end of the rotary joint is fixedly connected to the upper side of the second connecting ring, and the output end of the rotary joint is connected to the upper end of the straight tube.

[0024] The beneficial effects of the present application are as follows: the dust-proof coal conveying device for thermal power plants obtained by the present application through the above-mentioned design, when in use, the variable dust cover mechanism is movably arranged on the walking support assembly of the frames on both sides of the conveyor belt of the conveyor to seal and protect the conveyor belt, and driving assemblies are arranged at both ends thereof, which can realize the free movement, retraction and extension of the pleated curtain cover above the conveyor belt in cooperation with the driven support assembly, and can seal and expose the conveyor structure at any time, facilitate maintenance and significantly reduce costs; the width of both sides of the variable support assembly can also be adaptively expanded within a certain conveyor belt width range, so that one type of dust cover can be suitable for multiple types of conveyors without customization, thereby reducing manufacturing and use costs, and facilitating the distributed arrangement of the spray dust reduction system, so as to achieve the purpose of dust-proof coal conveying in thermal power plants at a relatively low cost, reduce the production cost of thermal power plants, and improve economic and environmental benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of a dust-proof coal conveying device for a thermal power plant provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of the structure of a variable dust cover mechanism and a variable spray dust suppression mechanism provided in an embodiment of the present application;

[0028] Figure 3 A schematic diagram of the structure of the walking support assembly provided in the embodiment of the present application;

[0029] Figure 4 A schematic diagram of the structure of a walking support assembly, a driving assembly, a driven support assembly, a variable support assembly, a pleated curtain cover, a synchronization assembly and a variable spray dust suppression mechanism provided in an embodiment of the present application;

[0030] Figure 5 A schematic diagram of the structure of a variable dust cover mechanism provided in an embodiment of the present application;

[0031] Figure 6 A schematic diagram of the structure of a drive assembly, a variable support assembly and a synchronization assembly provided in an embodiment of the present application;

[0032] Figure 7 A schematic diagram of the structure of a drive assembly and a variable support assembly provided in an embodiment of the present application;

[0033] Figure 8 A schematic diagram of the structure of a drive assembly provided in an embodiment of the present application;

[0034] Fig. 9 A schematic diagram of the structure of a driven support assembly provided in an embodiment of the present application;

[0035] Fig.10 A schematic diagram of the structure of a variable spray dust suppression mechanism provided in an embodiment of the present application;

[0036] Fig.11 A schematic diagram of the input assembly, the third connecting ring and the nozzle structure provided in the embodiment of the present application;

[0037] Fig.12 A schematic diagram of the structure of an electric slip ring and a first sliding key provided in an embodiment of the present application;

[0038] Fig.13 A schematic diagram of the input assembly and nozzle structure provided for the embodiment of the present application;

[0039] Fig.14 This is a schematic diagram of the third connecting ring and nozzle structure provided in an embodiment of the present application.

[0040] In the figure: 10, conveyor; 20, variable dust cover mechanism; 21, walking support assembly; 211, main rail; 212, auxiliary rail; 213, through hole; 214, slot hole; 22, drive assembly; 221, shell; 2211, plug plate; 2212, brush plate; 2213, brush head; 222, roller; 223, servo motor; 224, sprocket chain group; 225, electromagnetic lock; 226, first limit wheel group; 23, driven support assembly; 231, rolling platform; 232, second limit wheel group; 24, variable support assembly; 241, first keel; 242, second keel; 243, electric push Rod; 25, pleated curtain cover; 26, synchronization component; 261, rack; 262, gear; 30, variable spray dust suppression mechanism; 31, variable bracket; 311, first connecting rod; 312, second connecting rod; 313, first connecting ring; 314, second connecting ring; 32, electric slip ring; 321, first sliding key; 33, input component; 331, straight pipe; 332, connecting column; 3321, first keyway; 333, second sliding key; 3331, limit head; 334, sealing ring; 34, third connecting ring; 35, nozzle; 351, nozzle; 352, second keyway; 36, bearing; 37, rotary joint. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0042] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] Example

[0044] like Figure 1 As shown, according to the embodiment of the present application, the anti-dust coal conveying device for a thermal power plant includes a conveyor 10, a variable dust cover mechanism 20 and a variable spray dust suppression mechanism 30. The variable dust cover mechanism 20 is movably arranged on the frames on both sides of the conveyor belt of the conveyor 10, which is convenient for expansion and retraction, and can conveniently cover and expose the conveyor 10. It has strong adaptability and multiple uses, which significantly reduces the cost of dust prevention for coal transportation in thermal power plants and is also convenient for maintenance of the conveyor 10; the variable spray dust suppression mechanism 30 is movably arranged under the two second keels 242, and can adaptively change the spray volume as the size of the cover space of the variable dust cover mechanism 20 changes, thereby improving the spray dust suppression efficiency and saving water and cost.

[0045] According to some embodiments of the present application, Figure 1-Figure 9 As shown, the variable dust cover mechanism 20 is movably arranged on the racks on both sides of the conveyor belt of the conveyor 10; the variable dust cover mechanism 20 includes a walking support assembly 21, a driving assembly 22, a driven support assembly 23, a variable support assembly 24 and a pleated curtain cover 25, two walking support assemblies 21 are symmetrically arranged in parallel on the racks on both sides of the conveyor belt of the conveyor 10, two groups of driving assemblies 22 are symmetrically arranged at both ends of the two walking support assemblies 21, a plurality of driven support assemblies 23 are evenly symmetrically and movably arranged on the two walking support assemblies 21, a variable support assembly 24 is arranged on every two corresponding driven support assemblies 23, and a variable support assembly 24 is also arranged on the two corresponding driving assemblies 22 at the same end of the two walking support assemblies 21. A variable support assembly 24 is provided, and a pleated curtain cover 25 is provided between every two variable support assemblies 24. The walking support assembly 21 includes a main rail 211 and an auxiliary rail 212. The main rail 211 is arranged on the frame outside the conveyor belt of the conveyor 10, and the auxiliary rail 212 is arranged on the outside of the main rail 211. The upper end of the auxiliary rail 212 is flush with the upper end of the main rail 211, and the lower end of the auxiliary rail 212 is shorter than the lower end of the main rail 211. The main rail 211 is used to carry and support the variable dust cover mechanism 20 and the variable spray dust reduction mechanism 30, and the auxiliary rail 212 is used for limiting and clamping to ensure the convenient movement of the variable dust cover mechanism 20 and maintain stability without slipping; the lower end of the auxiliary rail 212 is shorter than the lower end of the main rail 211 in order to leave enough space for loading at the lower end of the conveyor 10.

[0046] In a specific embodiment, the driving assembly 22 includes a housing 221, a roller 222, a servo motor 223 and a sprocket chain set 224. The two rollers 222 are arranged to rotate in parallel inside the housing 221. The servo motor 223 is arranged on the outside of the outer end of the housing 221. The servo motor 223 is connected to one roller 222 through the sprocket chain set 224. The roller 222 is rotatably arranged in the main rail 211. The outer end of the wheel axle of one roller 222 rotates and passes through the outside of the housing 221. An electromagnetic lock 225 is arranged inside the end of the housing 221 away from the servo motor 223. A first limit wheel set 226 is arranged on the outside of the housing 221. The first limit The positioning wheel group 226 is movably connected to the auxiliary rail 212 to ensure the smooth running and limiting of the driving component 22 to prevent it from falling off; a plug plate 2211 is provided at one end of the housing 221 away from the servo motor 223, a brush plate 2212 is provided on the outer side of the plug plate 2211, and a brush head 2213 is provided at the end of the brush plate 2212. The brush head 2213 is attached to the bottom side of the inner part of the main rail 211. A plurality of through holes 213 and a plurality of slots 214 are evenly and staggeredly provided on the main rail 211. The regular distribution of the through holes 213 is conducive to locking the driving component 22 when it runs to a suitable position through the movable pin of the electromagnetic lock 225, and the slot 214 is convenient for the brush head 22 13 When the driving assembly 22 is running, the accumulated coal dust and other sundries are synchronously swept from the main rail 211 to ensure the cleanliness of the main rail 211; the driven support assembly 23 includes a rolling platform 231 and a second limiting wheel group 232, the rolling platform 231 is movably arranged on the main rail 211, and the two second limiting wheel groups 232 are symmetrically arranged on the outer side of the rolling platform 231, and the second limiting wheel group 232 can also be movably connected to the auxiliary rail 212 to ensure the smooth running and limiting of the rolling platform 231 and prevent it from falling off the frame of the conveyor 10; the rolling platform 231 is provided with damping, and the servo motor 223 is started to drive the sprocket chain group 224 A roller 222 drives the shell 221 to drive the head-end variable support assembly 24 to move, and pushes and pulls the rolling platform 231 in turn to change the position and spacing of a series of evenly distributed rolling platforms 231, and expands or contracts the pleated curtain cover 25 through the evenly distributed variable support assembly 24, thereby achieving the purpose of freely moving and expanding the sealing range and position of the pleated curtain cover 25, which is convenient for sealing and also for exposing the conveyor 10, and is easy to clean, maintain and maintain, avoiding the disadvantage of poor expansibility of the traditional fixed-type dedicated conveyor 10 sealing cover, and can achieve a one-type multi-purpose conveyor 10 sealing structure, significantly reducing the manufacturing and use costs.

[0047] The variable support assembly 24 includes two first keels 241, two second keels 242 and two electric push rods 243. The two first keels 241, the two second keels 242 and the two electric push rods 243 are symmetrically arranged. The lower end of the first keel 241 is rotatably connected to the upper side of the brush plate 2212 and the upper side of the rolling platform 231. The lower end of the electric push rod 243 is rotatably connected to the outer side of the brush plate 2212 and the outer side of the rolling platform 231. The upper end of the output end of the electric push rod 243 is rotatably connected to the outer side of the first keel 241, and the lower end of the second keel 242 is rotatably connected to the outer side of the first keel 241. It is rotatably connected to the upper end of the first keel 241, and the upper end of a second keel 242 is rotatably connected to the upper end of another second keel 242. When the coal conveying volume is small, the electric push rods 243 on both sides will shrink at the same time, which will synchronously pull the first keels 241 on both sides outward, thereby lowering the top of the enclosed space formed by the two second keels 242, thereby shrinking the enclosed space and reducing the spray volume; when the coal conveying volume is large, the reverse operation is performed, the top of the enclosed space rises, the conveying space is increased, the spray volume is increased, the dust prevention effect is improved and water is saved.

[0048] Among them, a synchronization component 26 is also arranged between the main rail 211 and the auxiliary rail 212. The synchronization component 26 includes a rack 261 and a gear 262. The rack 261 is fixedly arranged on the outside of the main rail 211, and the gear 262 is arranged on the outer end of the axle of a roller 222. The two gears 262 on a rack 261 are respectively engaged with a rack 261. When the servo motor 223 drives the roller 222 to rotate through the sprocket chain group 224, the gear 262 is driven to roll on the rack 261 at the same time, so as to achieve the effect of anti-slip and synchronous movement, thereby ensuring the accurate stroke and position of the driving component 22.

[0049] According to some embodiments of the present application, Figure 4 and Figure 10-Figure 14As shown, when the weather is relatively dry and the particle size of the transported coal is small, it is still difficult to prevent the escape of coal dust even if the variable dust cover mechanism 20 is used for sealing and protection. At present, spray dust reduction is generally used to further improve the dust prevention effect of coal transportation in thermal power plants. Similarly, due to the fixed structure of the existing conveyor 10 dust cover, the spray device in the commonly used conveyor 10 protective cover is also mostly fixed, and the spray amount is generally relatively fixed, which is difficult to adapt to the different amounts of dust generated by different conveying volumes, thereby affecting the spray dust reduction effect. It is also difficult to adjust the water spray amount according to the different coal conveying volumes to maintain a reasonable coal dryness and wetness, which is not conducive to reducing the occurrence of excessive water spraying. Therefore, it is extremely unfavorable to save water resources, causes unnecessary waste of resources, and increases production costs. The variable spray dust suppression mechanism 30 is movably arranged under the two second keels 242. The variable spray dust suppression mechanism 30 includes a variable bracket 31, an electric slip ring 32, an input assembly 33, a third connecting ring 34 and a nozzle 35. The two ends of the variable bracket 31 are rotatably connected to the lower sides of the two second keels 242 respectively. The electric slip ring 32 and the third connecting ring 34 are respectively arranged on the upper side and the lower side of the lower movable end of the variable bracket 31. The upper end of the nozzle 35 rotates and penetrates the middle part of the third connecting ring 34. The upper end of the input assembly 33 rotates and penetrates the upper movable end of the variable bracket 31. The lower end of the input assembly 33 passes through the middle of the electric slip ring 32 and is respectively connected to the electric slip ring 32 and the nozzle 35. The variable bracket 31 includes two first connecting rods 311, two second connecting rods 312, a first connecting ring 313 and a second connecting ring 314. The two first connecting rods 311 are symmetrically arranged. The first connecting ring 313 is arranged between the lower ends of the two first connecting rods 311. The upper end and the lower end of the first connecting rod 311 are respectively rotatably connected to the lower side of the second keel 242 and one side of the first connecting ring 313; the two second connecting rods 312 are also symmetrically arranged. The ring 314 is arranged between the upper ends of the two second connecting rods 312. The upper end and the lower end of the second connecting rod 312 are rotatably connected to one side of the second connecting ring 314 and the upper side of the first connecting rod 311 respectively. The electric slip ring 32 and the third connecting ring 34 are arranged on the upper side and the lower side of the first connecting ring 313 respectively. The inner circumference of the rotor of the electric slip ring 32 is evenly provided with a plurality of first sliding keys 321. The input assembly 33 includes a straight tube 331, a connecting column 332 and a second sliding key 333. The straight tube 331 is fixedly passed through the connecting column 332. The connecting column 332 is evenly provided with a plurality of first sliding keys 321. A plurality of first key grooves 3321, in which the first sliding key 321 is slidably disposed; a plurality of second sliding keys 333 are evenly disposed on the lower side of the connecting column 332; a sealing ring 334 is disposed on the outer edge of the lower end of the straight tube 331, and the lower end of the straight tube 331 slides through the inside of the nozzle 35, and a plurality of nozzles 351 are evenly arranged on the outer side of the nozzle 35, and a plurality of second key grooves 352 are evenly opened on the periphery of the nozzle 35, and the second sliding key 333 is slidably disposed in the second key groove 352, and a limit head 3331 is disposed on the outer side of the lower end of the second sliding key 333;The upper end of the straight tube 331 rotates through the second connecting ring 314 through the bearing 36; the upper end of the straight tube 331 is provided with a rotating joint 37, and one side of the input end of the rotating joint 37 is fixedly connected to the upper side of the second connecting ring 314, and the output end of the rotating joint 37 is connected to the upper end of the straight tube 331. When the coal conveying volume is small, the electric push rods 243 on both sides shrink at the same time, which will synchronously pull the first keels 241 on both sides outward, thereby lowering the top of the enclosed space formed by the two second keels 242. While reducing the enclosed space, the two second keels 242 pull the two first connecting rods 311, and then drive the two second connecting rods 312. The distance between the first connecting ring 313 and the second connecting ring 314 is shortened, and the distance that the lower end of the straight tube 331 slides into the interior of the nozzle 35 increases, and the number of connected nozzles 351 decreases, and the spray When the amount of coal transported is reduced, the cover space of the variable dust cover mechanism 20 becomes smaller, which does not affect the dust suppression effect of the spray; on the contrary, when the coal transport volume is large, the reverse operation is performed, and the electric push rods 243 on both sides push at the same time, which will synchronously push the first keels 241 on both sides to approach the conveyor belt, thereby further arching the two second keels 242, and the top of the cover space formed rises. While increasing the cover space, the two second keels 242 push the two first connecting rods 311, and then also drive the two second connecting rods 312, the distance between the first connecting ring 313 and the second connecting ring 314 increases, the distance that the lower end of the straight pipe 331 slides out of the nozzle 35 increases, the number of connections of the nozzle 351 increases, the spray volume increases, and the top of the variable dust cover mechanism 20 rises, increasing the transport space while increasing the spray volume, further improving the dust prevention effect. The spray volume adjustment of the nozzle 351 and the increase and decrease of the cover space are all performed synchronously, adapted to each other and coordinated by the electric push rods 243, without the need for manual or corresponding control elements to adjust and judge. While adjusting the spray volume by increasing or decreasing the transport space according to the different coal transporting volumes of the conveyor 10, as the distance between the first connecting ring 313 and the second connecting ring 314 changes, the first sliding key 321 slides in the first key slot 3321, and the second sliding key 333 slides in the second key slot 352. At the same time, the electric slip ring 32 drives the connecting column 332 and the straight pipe 331 to slide through the first sliding key 321, and then the connecting column 332 drives the nozzle 35 to rotate through the second sliding key 333, thereby increasing the coverage, uniformity and quality of the spray, ensuring a better further spray dust reduction effect, and effectively saving water resources. The limit head 3331 can prevent the input component 33 and the nozzle 35 from being separated, which can effectively avoid unnecessary waste of resources, reduce resource consumption and production costs, and bring higher economic and environmental benefits. ;

[0050] Specifically, the working principle of the dust-proof coal conveying device for thermal power plants is as follows: when in use, the variable dust cover mechanism 20 is movably arranged on the main rail 211 and the auxiliary rail 212 of the frames on both sides of the conveyor belt of the conveyor 10, and a driving assembly 22 is arranged at both ends thereof, and the servo motor 223 is started to drive a roller 222 through the sprocket chain group 224, and then the housing 221 drives the head end variable support assembly 24 to move, and at the same time drives the gear 262 to roll on the rack 261 to achieve the effect of anti-skid and synchronous movement, so as to ensure the accurate stroke and position of the driving assembly 22, and the movable pin of the electromagnetic lock 225 is used to move the driving assembly 22 to the appropriate position. The rolling platform 231 is pushed and pulled in sequence to change the position and spacing of a series of evenly distributed rolling platforms 231, and the pleated curtain cover 25 is expanded or contracted by the evenly distributed variable support components 24, so as to achieve the purpose of freely moving and expanding the sealing range and position of the pleated curtain cover 25, which is convenient for sealing and also convenient for exposing the conveyor 10, and convenient for cleaning, maintenance and maintenance, avoiding the disadvantage of poor expansibility of the traditional fixed special conveyor 10 sealing cover, and can achieve a one-type multi-purpose conveyor 10 sealing structure, significantly reducing the manufacturing and use costs; when the coal conveying volume is small, the electric push rods 243 on both sides are simultaneously The contraction will synchronously pull the first keels 241 on both sides outward and thereby reduce the top of the enclosed space formed by the two second keels 242. While reducing the enclosed space, the two second keels 242 pull the two first connecting rods 311 and then drive the two second connecting rods 312, the distance between the first connecting ring 313 and the second connecting ring 314 is close, the distance for the lower end of the straight pipe 331 to slide into the inside of the nozzle 35 increases, the number of connections of the nozzle 351 decreases, the spray volume decreases, and the enclosed space of the variable dust cover mechanism 20 becomes smaller, which does not affect the dust reduction effect of the spray. On the contrary, when the coal conveying volume is large, the reverse operation is performed, and the electric push rods 243 on both sides are At the same time, the jacking will synchronously push the first keels 241 on both sides closer to the conveyor belt and further arch the two second keels 242, and the top of the enclosed space will rise. While increasing the enclosed space, the two second keels 242 will push the two first connecting rods 311, and then drive the two second connecting rods 312, the distance between the first connecting ring 313 and the second connecting ring 314 will increase, the distance between the lower end of the straight tube 331 sliding out of the nozzle 35 will increase, the number of connections of the nozzle 351 will increase, the spray volume will increase, and the top of the variable dust cover mechanism 20 will rise. While increasing the conveying space, the spray volume will increase, thereby further improving the dust prevention effect.While adjusting the spray volume by increasing or decreasing the transfer space according to the different coal conveying volumes of the conveyor 10, as the distance between the first connecting ring 313 and the second connecting ring 314 changes, the first sliding key 321 slides in the first key slot 3321, and the second sliding key 333 slides in the second key slot 352. At the same time, the electric slip ring 32 drives the connecting column 332 and the straight pipe 331 to slide through the first sliding key 321, and then the connecting column 332 drives the nozzle 35 to rotate through the second sliding key 333, thereby increasing the coverage, uniformity and quality of the spray, ensuring a better further spray dust reduction effect, and effectively saving water resources. The limit head 3331 can prevent the input component 33 and the nozzle 35 from detaching. This can effectively avoid unnecessary waste of resources, reduce resource consumption and production costs, and bring higher economic and environmental benefits; the variable dust cover mechanism 20 can be freely moved, telescopic and expanded above the conveyor belt, and can seal and expose the conveyor 10 structure at any time, which is convenient for maintenance and significantly reduces costs; the width of both sides of the variable dust cover mechanism 20 can also be adaptively expanded within a certain conveyor belt width range, so that one type of dust cover can be suitable for multiple types of conveyors 10 without customization, reducing manufacturing and use costs, and facilitating the distributed setting of spray dust reduction systems, so as to achieve the purpose of preventing dust from transporting coal in thermal power plants at a lower cost, reduce the production costs of thermal power plants, and improve economic and environmental benefits.

[0051] It should be noted that the specific models and specifications of the conveyor 10, servo motor 223, sprocket chain set 224, electromagnetic lock 225, electric push rod 243, pleated curtain cover 25, rack 261, gear 262, electric slip ring 32, sealing ring 334, bearing 36 and rotary joint 37 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0052] The power supply and principles of the conveyor 10, the servo motor 223, the electromagnetic lock 225, the electric push rod 243 and the electric slip ring 32 are clear to those skilled in the art and will not be described in detail here.

[0053] The above description is only the preferred implementation mode of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A dust-proof coal conveying device for a thermal power plant, characterized in that: include Conveyor (10); A variable dust cover mechanism (20), the variable dust cover mechanism (20) comprising a walking support assembly (21), a driving assembly (22), a driven support assembly (23), a variable support assembly (24) and a pleated curtain cover (25), two walking support assemblies (21) are symmetrically arranged in parallel on the racks on both sides of the conveyor belt of the conveyor (10), two groups of driving assemblies (22) are symmetrically arranged at the two ends of the two walking support assemblies (21), a plurality of driven support assemblies (23) are evenly symmetrically and movably arranged on the two walking support assemblies (21), and one variable support assembly (24) is arranged on every two corresponding driven support assemblies (23). The variable support assembly (24) is also provided on two corresponding drive assemblies (22) at the same end of the two walking support assemblies (21), and the pleated curtain cover (25) is provided between each two variable support assemblies (24); the walking support assembly (21) comprises a main rail (211) and a secondary rail (212), the main rail (211) is provided on a frame outside the conveyor belt of the conveyor (10), the secondary rail (212) is provided outside the main rail (211), the upper end of the secondary rail (212) is flush with the upper end of the main rail (211), and the lower end of the secondary rail (212) is shorter than the main rail (211). ); the driving assembly (22) comprises a housing (221), a roller (222), a servo motor (223) and a sprocket chain set (224); the two rollers (222) are rotatably arranged in parallel inside the housing (221); the servo motor (223) is arranged outside the outer end of the housing (221); the servo motor (223) is connected to one of the rollers (222) through the sprocket chain set (224); the rollers (222) are rotatably arranged inside the main rail (211); the outer end of the wheel shaft of one of the rollers (222) rotatably penetrates the outer side of the housing (221); the housing (221) is away from the servo motor A plugging plate (2211) is provided at one end of the motor (223), a brush plate (2212) is provided on the outside of the plugging plate (2211), a brush head (2213) is provided at the end of the brush plate (2212), and the brush head (2213) is attached to the inner bottom side of the main rail (211); the driven support assembly (23) comprises a rolling platform (231) and a second limiting wheel group (232), the rolling platform (231) is movably arranged on the main rail (211), two second limiting wheel groups (232) are symmetrically arranged on the outside of the rolling platform (231), and the second limiting wheel group (232) is movably clamped on the auxiliary rail (212);The variable support assembly (24) comprises two first keels (241), two second keels (242) and two electric push rods (243); the two first keels (241), the two second keels (242) and the two electric push rods (243) are symmetrically arranged; the lower end of the first keel (241) is rotatably connected to the upper side of the brush plate (2212) and the upper side of the rolling platform (231); the lower end of the electric push rod (243) is rotatably connected to the outer side of the brush plate (2212) and the outer side of the rolling platform (231); the upper end of the output end of the electric push rod (243) is rotatably connected to the outer side of the first keel (241); the lower end of the second keel (242) is rotatably connected to the upper end of the first keel (241); and the upper end of one second keel (242) is rotatably connected to the upper end of another second keel (242). ; 2. The dust-proof coal conveying device for a thermal power plant according to claim 1, characterized in that: The main rail (211) is provided with a plurality of through holes (213) and a plurality of slot holes (214) in a uniform and staggered manner.

3. The dust-proof coal conveying device for a thermal power plant according to claim 1, characterized in that: An electromagnetic lock (225) is disposed inside the housing (221) at one end away from the servo motor (223); a first limiting wheel set (226) is disposed outside the housing (221), and the first limiting wheel set (226) is movably clamped on the auxiliary rail (212).

4. The dust-proof coal conveying device for a thermal power plant according to claim 1, characterized in that: A synchronization component (26) is also provided between the main rail (211) and the auxiliary rail (212), the synchronization component (26) comprising a rack (261) and a gear (262), the rack (261) being fixedly provided on the outside of the main rail (211), the gear (262) being provided on the outer end of the axle of one of the rollers (222), and the two gears (262) on one of the racks (261) respectively meshing with one of the racks (261).

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