Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a small heliostat cleaning device for cleaning the mirror surface of a small heliostat so as to keep the heliostat to fully absorb sunlight.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a small-size heliostat cleaning equipment, which comprises a base, a rolling device for letting the device remove, a slider for getting rid of heliostat surface dust, set up the brush on slider, a water pump unit for wasing remaining spot on the brush, an adjusting device for adjusting equipment height as required, a scraper means for will remaining outside the spot discharge apparatus, set up the computer lab on slider, set up the computer lab space inside the computer lab, set up the filter on scraper means, a self-lock device for preventing the filter from moving down in the brush cleaning process, a conveyer for inciting somebody to action grit impurity shifts to the equipment outside from the filter.
The adjusting device comprises a machine base space arranged in the machine base, a threaded pipe rotationally arranged on the upper end wall of the machine base space, a bevel gear ring arranged at the lower end of the threaded pipe, a threaded space arranged in the threaded pipe, a piston arranged in the threaded space, a straight rod arranged on the upper surface of the piston, a bevel gear arranged in the machine base space and matched with the bevel gear ring, a transmission shaft arranged on the left end surface of the bevel gear, a driving piece arranged on the left end surface of the machine base, a spline arranged on the upper surface of the machine base and a spline groove arranged on the outer surface of the straight rod and matched with the spline, wherein the left end of the transmission shaft penetrates through the left end wall of the machine base space and is in transmission connection with the driving piece; the driving part is started, the driving part drives the bevel gear to rotate, the bevel gear drives the bevel gear ring to rotate, the bevel gear ring drives the threaded pipe to rotate, and the rotation of the straight rod is limited through the matching of the spline and the spline groove, so that the straight rod can move up and down, the cleaning effect is prevented from being influenced by the fact that the height of the brush is too high or too low from the mirror surface, and the cleaning device is suitable for cleaning heliostats with different heights; the spline can let rotary motion become linear motion with the close fit in spline groove, and the every rotatory round of displacement of motor is short when driving the straight-bar through the rotation of screwed pipe and rising or descend, is fit for more accurate height-adjusting.
The sliding device comprises a shell fixedly connected to the upper surface of the straight rod, a shell space which is arranged in the shell and penetrates through the shell, a second driving part arranged on the right end wall of the shell space, a power shaft arranged on the left end surface of the second driving part, a first connecting rod fixedly connected to the left end of the power shaft, a second connecting rod hinged to the front end of the first connecting rod, a straight plate hinged to the front end of the second connecting rod, a brush plate fixedly connected to the lower surface of the straight plate, a first supporting plate fixedly connected to the left end wall of the shell space, a second supporting plate fixedly connected to the right end of the first supporting plate, and a through groove which is arranged on the front end surface of the brush plate and penetrates through the front and the back, wherein the second supporting plate slides in the through groove; the second driving piece is started, the second driving piece drives the power shaft to rotate, the power shaft drives the first connecting rod to rotate, the first connecting rod drives the second connecting rod to move, and the second connecting rod drives the brush plate to reciprocate back and forth, so that dust on the heliostat can be swept away by the brush at the front end of the brush plate and then automatically returns, and convenience is provided for cleaning the brush by using the water pump device in the next step; the cooperation of logical groove and second backup pad can make the brush slide on fixed route, can not lead to the clear not abundant on the heliostat because of sliding produces the deviation.
The rolling device comprises a movable plate fixedly connected to the lower surface of the base, four turnplates respectively rotatably arranged at four corners of the lower surface of the movable plate, two connecting plates respectively arranged at the lower surfaces of the four turnplates, four idler wheels respectively rotatably arranged at opposite surfaces of the two connecting plates, a vertical plate arranged at the front end of the upper surface of the movable plate, two support plates respectively fixedly arranged at the left side and the right side of the front end surface of the vertical plate, pulleys respectively rotatably arranged at opposite surfaces of the two turnplates, a heliostat fixedly arranged at the front side of the base, a support rod fixedly arranged below the heliostat, a positioning plate fixedly arranged at the rear end of the outer surface of the support rod, a gear plate fixedly arranged at the front end of the positioning plate, four joint plates respectively arranged at four corners of the lower surface of the movable plate, four electromagnetic shells respectively arranged at one surfaces of the four joint plates close to the symmetric center, electromagnetic spaces respectively arranged inside the four electromagnetic shells, The pulley is fixedly arranged between the first electromagnet and the second electromagnet, and can move in a clinging manner on the rear end face of the gear plate; when the device moves to a designated area, the electromagnet can be electrified, the first electromagnet and the second electromagnet are ejected out of the electromagnetic space by the principle that like poles repel each other, so that the second electromagnet is abutted against the two support plates, the direction of the roller cannot be changed, and the roller can only move forwards, so that a whole row of heliostat cleaning equipment can be used for cleaning a whole row of heliostat after the direction is designated once, the cost is saved, and the device can move more stably by the arrangement of the four rollers; sliding friction between the equipment and the gear plate can be changed into rolling friction through the pulley, so that friction force is reduced, the situation that the equipment is hindered from going forward due to overlarge friction between the heliostat and the equipment is prevented, and the stability of the equipment is enhanced.
The brush is fixedly arranged on the front end face of the brush plate and is made of wool or horsehair; the wool or horsehair material is softer, can not cause too big damage to the mirror surface of heliostat when clean dust and grit.
The water pump device comprises a first water pipe communicated with the right end wall of the shell space, a water pump communicated with the right end of the first water pipe, a second water pipe communicated with the right end of the water pump, a water filtering tank fixedly arranged on the upper end wall of the shell space, a water filtering space arranged in the water filtering tank, a plurality of filtering holes arranged on the lower end wall of the water filtering space, a water tank arranged on the lower end wall of the shell space, and the upper end of the second water pipe is communicated with the upper end wall of the water filtering space; can inhale the drainage space with the water in the water tank through the water pump in to the impact force through rivers whereabouts washes the brush, and the falling speed of rivers can also be slowed down through the setting of a plurality of filtration pores, can also increase the scope of washing of rivers, thereby makes washing of brush more abundant, so that next cleaning work.
The self-locking device comprises wind power equipment fixedly connected to the right side of the lower end wall of the space of the enclosure, an enclosure fixedly arranged on the right end wall of the space of the enclosure, an enclosure space arranged in the enclosure and provided with a left opening, a connecting pipe fixedly arranged on the rear end surface of the wind power equipment and the front end surface of the enclosure, a connecting shaft rotatably connected to the opposite surface of the space of the enclosure, an impeller fixedly sleeved on the outer surface of the connecting shaft, support shafts respectively arranged at four corners of the lower end wall of the space of the enclosure, third electromagnets respectively sleeved at the upper ends of the outer surfaces of the four support shafts, fourth electromagnets respectively fixedly sleeved at the lower ends of the outer surfaces of the four support shafts, and second springs respectively fixedly connected between the four third electromagnets and the four fourth electromagnets, wherein the filter plate penetrates through the upper ends of the four support shafts and is fixedly connected to the upper end surfaces of the four third electromagnets; the impeller is driven to rotate by the impact force of water flow generated by water suction of the water pump, so that mechanical energy generated by rotation of the impeller is converted into electric energy through the wind power equipment, the electromagnet is electrified through the electric energy, the third electromagnet is always far away from the fourth electromagnet through the principle that like poles repel, and the third electromagnet provides supporting force for the filter plate to enable the filter plate not to descend due to gravity, so that when the brush is cleaned by conveying water through the water pump, the filter plate cannot descend due to the impact force of the water, water cannot leak out of the device, and the device is more reasonable; the connecting pipe is customized by stainless steel, so that the influence on the normal operation of equipment caused by the conduction of related wires in the connecting pipe in water can be prevented.
The filter plate is arranged in the casing space, a stop block is fixedly arranged on the upper end wall of the casing space, a sealing plate is respectively arranged at the contact part of the stop block and the filter plate, and a plurality of sieve meshes which are communicated up and down are arranged on the upper surface of the filter plate; the sieve mesh can let water pass through and prevent grit dust impurity to pass through to can play the effect at clean water source, let water ability recycle moreover, can reach the effect of water economy resource.
The sealing plate is made of rubber, and the width of the sealing plate is slightly larger than that of the filtering plate; the sealing plate seals the gap between the filter plate and the end wall of the housing space so that grit dust does not bypass the filter plate to the lower end of the housing space, thereby enhancing the sealing of the device.
The self-locking device comprises two guide plates fixedly arranged on the left side and the right side of the upper surface of the filter plate, a scraper plate arranged between the two guide plates, soft cloth arranged between the right end surface of the scraper plate and the right end wall of the space of the machine shell, a third spring fixedly arranged between the right end surface of the scraper plate and the left end wall of the space of the machine shell, a box body arranged on the right end surface of the stop block, a box body space arranged in the box body and provided with a downward opening, a water baffle plate arranged on the lower surface of the filter plate, a vertical rod fixedly arranged on the left end surface of the water baffle plate, a rack fixedly arranged at the upper end of the vertical rod, a rotating shaft rotatably arranged on the front end surface of the space of the box body, a gear fixedly sleeved on the outer surface of the rotating shaft and meshed with the rack, a rope twisting wheel fixedly arranged at the rear end of the rotating shaft, a rope wound on the outer surface of the rope twisting wheel, an opening arranged on the left end wall of the space of the machine shell, a slope arranged on the lower end wall of the opening, and the right end of the rope penetrates through the left end wall of the space of the machine shell and is fixedly connected to the left end surface of the scraper plate, the rear end of the rotating shaft penetrates through the rear end wall of the box body space, and the gear and the rack are located in the box body space; when the gravel dust on the filter plate reaches a certain weight, the filter plate can fall below the stop block, meanwhile, the filter plate can drive the rack to fall, the rack drives the gear to rotate, the gear drives the rope twisting wheel to rotate, so that the rope is driven to move, the rope drives the scraper to move leftwards, so that the gravel on the filter plate is scraped onto a slope through the scraper, and then the gravel is discharged out of the equipment through the slope; after the gravel dust is removed, the device can be reset under the action of the third spring, so that the device can be recycled; the setting of soft cloth can prevent that the grit dust from dropping the right side of scraper blade and causing the interference to next time clean, makes the device more stable to the continuous use of equipment has been guaranteed.
In summary, the invention has the following advantages: this device simple structure can clean the small-size heliostat mirror surface in the desert to guarantee that small-size top heliostat can not influence the effect that absorbs solar energy because the mirror surface is covered by gravel dust.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
As shown in fig. 1-11, a small heliostat cleaning device comprises a base 1, a rolling device for moving the device, a sliding device for removing dust on the surface of the heliostat, a brush 50 arranged on the sliding device, a water pump device for washing away residual stains on the brush 50, an adjusting device for adjusting the height of the device according to needs, a scraper device for discharging the residual stains out of the device, a machine room arranged on the sliding device, a machine room space arranged inside the machine room, a filter plate 5 arranged on the scraper device, a self-locking device for preventing the filter plate 5 from moving downwards in the brush cleaning process, and a transportation device for transferring gravel impurities from the filter plate 5 to the outside of the device.
Has the advantages that: this device is simple to use, can clean the grit dust on the small-size heliostat mirror surface to prevent that the grit dust from producing when absorbing solar energy to small-size heliostat and interfering, can also wash the water pump for the brush of clean grit dust, clean grit dust that gets off from the brush can clear away equipment through scraper means, can once only clean a whole row of heliostat through slider, thereby reduced the cost of labor, improved work efficiency.
The adjusting device comprises a base space 14 arranged in the base 1, a threaded pipe 8 rotatably arranged on the upper end wall of the base space 14, a bevel gear ring 9 arranged at the lower end of the threaded pipe 8, a threaded space 10 arranged in the threaded pipe 8, a piston 11 arranged in the threaded space 10, a straight rod 12 arranged on the upper surface of the piston 11, a bevel gear 15 arranged in the base space 14 and matched with the bevel gear ring 9, a transmission shaft 16 arranged on the left end surface of the bevel gear 15, a driving part 17 arranged on the left end surface of the base 1, a spline 18 arranged on the upper surface of the base 1, and a spline groove 19 arranged on the outer surface of the straight rod 12 and matched with the spline 18, wherein the left end of the transmission shaft 16 penetrates through the left end wall of the base space 14 and is in transmission connection with the driving part 17; the driving part 17 is started, the driving part 17 drives the bevel gear 15 to rotate, the bevel gear 15 drives the bevel gear ring 9 to rotate, the bevel gear ring 9 drives the threaded pipe 8 to rotate, and the rotation of the straight rod 12 is limited through the matching of the spline 18 and the spline groove 19, so that the straight rod 12 can move up and down, a proper height can be selected according to the height of the mirror surface of the heliostat for cleaning, the cleaning effect is prevented from being influenced by the fact that the height of the brush 50 from the mirror surface is too high or too low, and the cleaning device is suitable for cleaning heliostats with different heights; the spline 18 and the spline groove 19 are tightly matched to change the rotary motion into linear motion, and the moving distance of each rotation of the motor is short when the straight rod is driven to ascend or descend by the rotation of the threaded pipe 8, so that the height adjusting device is suitable for more accurate height adjustment.
The sliding device comprises a machine shell 20 fixedly connected to the upper surface of the straight rod 12, a machine shell space 21 arranged in the machine shell 20 and penetrating forwards and backwards, a second driving piece 22 arranged on the right end wall of the machine shell space 21, a power shaft 23 arranged on the left end surface of the second driving piece 22, a first connecting rod 24 fixedly connected to the left end of the power shaft 23, a second connecting rod 25 hinged to the front end of the first connecting rod 24, a straight plate 26 hinged to the front end of the second connecting rod 25, a brush plate 27 fixedly connected to the lower surface of the straight plate 26, a first supporting plate 28 fixedly connected to the left end wall of the machine shell space 21, a second supporting plate 29 fixedly connected to the right end of the first supporting plate 28, and a through groove 30 arranged on the front end surface of the brush plate 27 and penetrating forwards and backwards, wherein the second supporting plate 29 slides in the through groove 30; the second driving part 22 is started, the second driving part 22 drives the power shaft 23 to rotate, the power shaft 23 drives the first connecting rod 24 to rotate, the first connecting rod 24 drives the second connecting rod 25 to move, and the second connecting rod 25 drives the brush plate 27 to reciprocate back and forth, so that dust on the heliostat can be swept away by the brush 50 at the front end of the brush plate 27 and then automatically returns, and convenience is provided for cleaning the brush 50 by using a water pump device in the next step; the cooperation of the through slot 30 with the second support plate 29 allows the brush 50 to slide on a fixed path without creating a deviation from sliding that would result in insufficient cleaning on the heliostat.
The rolling device comprises a moving plate 31 fixedly connected to the lower surface of the base 1, four rotating discs respectively rotatably arranged at four corners of the lower surface of the moving plate 31, two connecting plates 32 respectively arranged at the lower surfaces of the four rotating discs, four rollers 33 respectively rotatably arranged at opposite surfaces of the two connecting plates 32, a vertical plate 34 arranged at the front end of the upper surface of the moving plate 31, two support plates 44 respectively fixedly arranged at the left and right sides of the front end surface of the vertical plate 34, pulleys 35 respectively rotatably arranged at opposite surfaces of the two support plates 44, a heliostat 36 fixedly arranged at the front side of the base 1, a support rod 37 fixedly arranged below the heliostat 36, a positioning plate 38 fixedly arranged at the rear end of the outer surface of the support rod 37, a gear plate 39 fixedly arranged at the front end of the positioning plate 38, four joint plates 40 respectively arranged at four corners of the lower surface of the moving plate 31, four electromagnetic shells 41 respectively arranged at one surfaces of the four joint plates 40 close to the symmetric center, The four electromagnetic housings 41 are respectively provided with electromagnetic spaces 42 inside the four electromagnetic housings 41, first electromagnets 44 respectively arranged on the end wall of one end of each electromagnetic space 42 far away from the symmetry center, second electromagnets 45 respectively arranged in the electromagnetic spaces 42, and first springs 46 fixedly arranged between the first electromagnets 44 and the second electromagnets 45, wherein the pulleys 35 can be tightly attached to and move on the rear end face of the gear plate 39; when the device moves to a designated area, the electromagnet can be electrified, the first electromagnet 44 and the second electromagnet 45 are ejected out of the electromagnetic space 42 through the principle that like poles repel each other, so that the second electromagnet 45 props against the two support plates 44, the roller 33 cannot change the direction and only can move forwards straightly, and a whole row of heliostat can be cleaned by using one small heliostat cleaning device after the direction is designated once, so that the cost is saved, and the device can move more stably by arranging the four rollers 33; the sliding friction between the equipment and the gear plate 39 can be changed into rolling friction through the pulley 35, so that the friction force is reduced, the situation that the advance of the equipment is hindered due to the overlarge friction between the heliostat and the equipment is prevented, and the stability of the equipment is enhanced.
The brush 50 is fixedly installed on the front end surface of the brush plate 27 and is made of wool or horsehair; the wool or horsehair material is softer, can not cause too big damage to the mirror surface of heliostat when clean dust and grit.
The water pump device comprises a first water pipe 52 communicated with the right end wall of the shell space 21, a water pump 53 communicated with the right end of the first water pipe, a second water pipe 54 communicated with the right end of the water pump 53, a water filtering tank 55 fixedly arranged on the upper end wall of the shell space 21, a water filtering space 56 arranged in the water filtering tank 55, a plurality of filtering holes 57 arranged on the lower end wall of the water filtering space 56, a water tank arranged on the lower end wall of the shell space 21, and the upper end of the second water pipe 54 is communicated with the upper end wall of the water filtering space 56; can inhale the water in the water tank through water pump 53 in the drainage space 56 to through the impact force washing brush 50 of rivers whereabouts, the whereabouts speed of rivers can be slowed down through the setting of a plurality of filtration pores, can also increase the scope of washing of rivers, thereby make washing of brush more abundant, so that next cleaning work.
The self-locking device comprises a wind power device 80 fixedly connected to the right side of the lower end wall of the cabinet space 21, a cabinet fixedly arranged on the right end wall of the cabinet space 21, a cabinet space with a left opening arranged in the cabinet, a connecting pipe 60 fixedly arranged on the rear end surface of the wind power device 80 and the front end surface of the cabinet, a connecting shaft 81 rotatably connected to the opposite surface of the cabinet space, an impeller 61 fixedly sleeved on the outer surface of the connecting shaft 81, support shafts 62 respectively arranged at four corners of the lower end wall of the cabinet space 21, third electromagnets 63 respectively sleeved on the upper ends of the outer surfaces of the four support shafts 62, fourth electromagnets 64 respectively fixedly sleeved on the lower ends of the outer surfaces of the four support shafts 62, and second springs 610 respectively fixedly connected between the four third electromagnets 63 and the four fourth electromagnets 64, the filter plate 5 penetrates through the upper ends of the four support shafts 62 and is fixedly connected to the upper end surfaces of the four third electromagnets 63; the impeller is driven to rotate by the impact force of water flow generated by water suction of the water pump, so that mechanical energy generated by rotation of the impeller is converted into electric energy through the wind power equipment 80, the electromagnet is electrified through the electric energy, the third electromagnet 63 is always far away from the fourth electromagnet 64 through the principle that like poles repel, so that the third electromagnet 63 provides supporting force for the filter plate 5, the filter plate 5 cannot descend due to gravity, and the filter plate 5 cannot descend due to the impact force of water when the brush 50 is cleaned by water conveyed by the water pump, so that water cannot leak out of the device, and the device is more reasonable; the connection pipe 60 is made of stainless steel, so that the related wires in the connection pipe 60 can be prevented from conducting electricity in water to influence the normal operation of the device.
The filter plate 5 is arranged in the casing space 21, the upper end wall of the casing space 21 is fixedly provided with a stop block 70, three end walls of the casing space 21 and a contact part of the stop block 70 and the filter plate 5 are respectively provided with a sealing plate 65, and the upper surface of the filter plate 5 is provided with a plurality of sieve holes 620 which are communicated up and down; sieve pore 620 can let water pass through and prevent grit dust impurity to pass through to can play the effect of clean water source, let water ability recycle moreover, can reach the effect of water economy resource.
The sealing plate 65 is made of rubber, and the width of the sealing plate is slightly larger than that of the filter plate 5; the sealing plate 65 seals the gap between the filter plate 5 and the end wall of the cabinet space 21 so that the grit dust does not bypass the filter plate to the lower end of the cabinet space 21, thereby enhancing the sealing of the device.
The scraper device comprises two guide plates 66 fixedly arranged on the left and right sides of the upper surface of the filter plate 5, a scraper 67 arranged between the two guide plates 66, a soft cloth 68 arranged between the right end surface of the scraper 67 and the right end wall of the machine case space 21, a third spring 69 fixedly arranged between the right end surface of the scraper 67 and the left end wall of the machine case space 21, a box body 71 arranged on the right end surface of a stop block 70, a box body space 72 with a downward opening arranged inside the box body 71, a water baffle 73 arranged on the lower surface of the filter plate 5, a vertical rod 74 fixedly arranged on the left end surface of the water baffle 73, a rack 75 fixedly arranged on the upper end of the vertical rod 74, a rotating shaft 84 rotatably arranged on the front end surface of the box body space 72, a gear 90 fixedly arranged on the outer surface of the rotating shaft 84 and meshed with the rack 75, a twisted rope wheel 76 fixedly arranged on the rear end of the rotating shaft 84, a rope 77 wound on the outer surface of the twisted rope wheel 76, An opening 78 provided in the left end wall of the housing space 21, a slope 79 provided in the lower end wall of the opening 78, and a right end of the rope 77 passing through the left end wall of the housing space 21 and fixedly connected to the left end face of the scraper 67, a rear end of the rotary shaft 84 passing through the rear end wall of the box space 72, the gear 90 and the rack 75 being located in the box space 72; when the gravel dust on the filter plate 5 reaches a certain weight, the filter plate 5 can be descended below the stop block 70, meanwhile, the filter plate 5 can drive the rack 75 to descend, the rack 75 drives the gear 90 to rotate, the gear 79 drives the rope twisting wheel 76 to rotate, so that the rope 77 is driven to move, the rope 77 drives the scraping plate 67 to move leftwards, so that the gravel on the filter plate 5 is scraped to the slope 79 through the scraping plate 67 and then is discharged out of the equipment through the slope 79; when the gravel dust is removed, the device can be reset under the action of the third spring 69, so that the device can be recycled; the soft cloth 68 prevents the gravel dust from falling to the right side of the scraper 67 to interfere with the next cleaning, making the device more stable, thereby ensuring the continuous use of the apparatus.
The working principle is as follows: the driving part 17 is started, the driving part 17 drives the bevel gear 15 to rotate, the bevel gear 15 drives the bevel gear ring 9 to rotate, the bevel gear ring 9 drives the threaded pipe 8 to rotate, the rotation of the straight rod 12 is limited through the matching of the spline 18 and the spline groove 19, so that the straight rod 12 can move up and down, a proper height can be selected according to the mirror surface height of the heliostat for cleaning, the second driving part 22 is started, the second driving part 22 drives the power shaft 23 to rotate, the power shaft 23 drives the first connecting rod 24 to rotate, the first connecting rod 24 drives the second connecting rod 25 to move, the second connecting rod 25 drives the brush plate 27 to reciprocate back and forth, so that dust on the heliostat can be swept away through the brush 50 at the front end of the brush plate 27 and then automatically returns back, when the device moves to a designated area, the electromagnet can be electrified, and the second electromagnet can be ejected out of the electromagnetic space through the principle that like poles repel each other, thereby abutting against the two support plates, the roller cannot change direction and only can move forwards, a whole row of heliostat can be cleaned by using a small heliostat cleaning device after the direction is appointed once, water in the water tank can be sucked into the water filtering space through the water pump, thereby washing the brush by the impact force of the falling of the water flow, slowing down the falling speed of the water flow and enlarging the washing range of the water flow by arranging a plurality of filter holes, thereby the brush is more fully washed, when the gravel dust on the filter plate reaches a certain weight, the filter plate can fall below the stop block, meanwhile, the filter plate can drive the rack to descend, the rack drives the gear to rotate, the gear drives the rope twisting wheel to rotate, thereby driving the rope to move, and the rope drives the scraper to move leftwards, so that the gravel on the filter plate is scraped to the slope through the scraper and then is discharged out of the equipment through the slope; when the gravel dust is removed, the device can be reset under the action of the third spring, so that the device can be recycled.
The first driving member and the second driving member are not only a motor, but also a device for driving the rotation of the driving members 23 and 16, and also a manual driving.
Has the advantages that: this device simple structure can clean the small-size heliostat mirror surface in the desert to guarantee that small-size top heliostat can not influence the effect that absorbs solar energy because the mirror surface is covered by gravel dust.
It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.