CN109290235B - Self-cleaning device for reflecting mirror solar photo-thermal power generation system - Google Patents
Self-cleaning device for reflecting mirror solar photo-thermal power generation system Download PDFInfo
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- CN109290235B CN109290235B CN201710607675.6A CN201710607675A CN109290235B CN 109290235 B CN109290235 B CN 109290235B CN 201710607675 A CN201710607675 A CN 201710607675A CN 109290235 B CN109290235 B CN 109290235B
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- 238000004140 cleaning Methods 0.000 title claims abstract description 193
- 238000010248 power generation Methods 0.000 title claims abstract description 28
- 238000000429 assembly Methods 0.000 claims abstract description 26
- 230000000712 assembly Effects 0.000 claims abstract description 26
- 230000007246 mechanism Effects 0.000 claims description 24
- 238000001179 sorption measurement Methods 0.000 claims description 10
- 230000008859 change Effects 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 description 13
- 230000005484 gravity Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 244000089409 Erythrina poeppigiana Species 0.000 description 6
- 235000009776 Rathbunia alamosensis Nutrition 0.000 description 6
- 239000000696 magnetic material Substances 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000284 resting effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/12—Brushes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/20—Cleaning of moving articles, e.g. of moving webs or of objects on a conveyor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B11/00—Cleaning flexible or delicate articles by methods or apparatus specially adapted thereto
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
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- Cleaning In General (AREA)
Abstract
The invention belongs to the technical field of reflector cleaning, and particularly relates to a reflector self-cleaning device and a solar photo-thermal power generation system, wherein the reflector self-cleaning device is used for cleaning a swingable reflector and comprises two groups of moving assemblies and cleaning assemblies, two sides of each cleaning assembly are respectively connected with the two moving assemblies, each moving assembly comprises a fixed plate and a roller group rotatably arranged on the fixed plate, the two fixed plates are respectively positioned at two opposite sides of the reflector, and the two roller groups are in contact with the surface of the reflector; when the reflector swings, the two roller groups roll back and forth along the surface of the reflector respectively, and the two fixing plates drive the cleaning assembly to be attached to the upper surface of the reflector so as to clean the upper surface of the reflector. The rotating frame rotates to track the sun, the two moving assemblies utilize the height change at the two ends of the reflecting mirror, so that the two moving assemblies respectively move back and forth between the two ends along the edges of the two sides of the reflecting mirror, and then the cleaning assemblies are driven to clean the reflecting mirror without power consumption driving and cleaning, and the generating efficiency is high.
Description
Technical Field
The invention belongs to the technical field of reflector cleaning equipment, and particularly relates to a reflector self-cleaning device and a solar photo-thermal power generation system.
Background
In a solar photo-thermal power generation system, sunlight is reflected by a plurality of heliostat frames, a rotating frame for tracking the sun is arranged on the heliostat frames, and a plurality of reflecting mirrors are arranged on the rotating frame. The reflector is completely outdoors in the use process, and dust in the air is deposited on the reflector after long-term use, so that the reflection effect of the reflector is seriously reduced. The mirrors in the prior art are difficult to clean, and firstly, the number of the mirrors is large, so that the mirrors are difficult to clean and belong to high-altitude operation; in addition, the existing automatic cleaning device for the reflecting mirrors needs to be electrified for use, a plurality of reflecting mirrors accumulate, and a lot of electric energy needs to be consumed, so that the power generation efficiency of the solar photo-thermal power generation system is reduced.
Disclosure of Invention
The invention aims to provide a reflector self-cleaning device and a solar photo-thermal power generation system, and aims to solve the technical problems that in the prior art, a reflector is difficult to clean and the power generation efficiency is low due to the consumption of electric energy for cleaning the reflector.
In order to achieve the above purpose, the invention adopts the following technical scheme: the self-cleaning device for the reflector comprises two groups of moving assemblies and cleaning assemblies, wherein two sides of each cleaning assembly are respectively connected with the two moving assemblies, each moving assembly comprises a fixed plate and a roller group which is rotatably arranged on the fixed plate, the two fixed plates are respectively positioned on two opposite sides of the reflector, and each roller group is contacted with the surface of the reflector; when the reflector swings, the two roller assemblies roll back and forth along the surface of the reflector respectively, and the two fixing plates drive the cleaning assemblies to be attached to the upper surface of the reflector so as to clean the upper surface of the reflector.
Further, the reflector self-cleaning device further comprises two traction mechanisms, wherein the two traction mechanisms comprise a shell, a coil spring, a rotating shaft and a traction rope, the shell is connected with the reflector, the rotating shaft is rotatably arranged in the shell, one end of the traction rope is wound at one end of the rotating shaft, the other end of the traction rope is connected with the fixing plate, the coil spring is arranged at the other end of the rotating shaft to drive the rotating shaft to roll the traction rope, and traction is continuously output through the traction rope to pull the fixing plate to reset.
Further, the reflector self-cleaning device further comprises a fixing frame for fixing the shell, the fixing frame comprises a fixing portion and a mounting portion connected with the fixing portion, the fixing portion is clung to the end portion of the reflector and is fixedly connected with the end portion of the reflector, and the shell is fixed to the mounting portion.
Further, each roller group comprises two upper rollers and two lower rollers, the two upper rollers are fixed on the corresponding fixing plates and located on the upper surfaces of the reflectors, and the two lower rollers are fixed on the corresponding fixing plates and located on the lower surfaces of the reflectors.
Further, the upper end of the reflector is provided with an upper baffle for limiting the cleaning assembly to move towards the upper end of the reflector, and the lower end of the reflector is provided with a lower baffle for limiting the cleaning assembly to move towards the lower end of the reflector.
Further, a first magnetic attraction piece is arranged on the upper baffle plate, and a third magnetic attraction piece which is used for being in adsorption connection with the first magnetic attraction piece is arranged on one side, facing the upper baffle plate, of the cleaning assembly; the cleaning assembly comprises a lower baffle plate, wherein a first magnetic attraction piece is arranged on the lower baffle plate, and a second magnetic attraction piece is arranged on one side of the cleaning assembly, facing the lower baffle plate, and is used for being in attraction connection with the first magnetic attraction piece.
Further, the outer surface of the third magnetic attraction piece and the outer surface of the fourth magnetic attraction piece are both provided with buffer pads.
Further, the lower baffle is fixed to a lower surface of a lower end of the reflecting mirror, and the lower baffle extends outward of the reflecting mirror so that the cleaning assembly is partially or entirely moved outward of the reflecting mirror when the cleaning assembly abuts against the lower baffle.
Further, the cleaning assembly comprises a connecting rod and a cleaning brush, wherein two ends of the connecting rod are respectively connected with the two fixing plates, and the cleaning brush is fixed on the connecting rod and distributed along the length direction of the connecting rod so as to brush the reflecting mirror.
The invention has the beneficial effects that: in the reflector self-cleaning device provided by the invention, the rotating frame rotates to track the sun, the reflector swings around the rotating frame, when the reflector swings greatly, the heights of the two ends of the reflector are alternately changed, the two moving assemblies respectively move back and forth between the two ends along the edges of the two sides of the reflector by utilizing the height change of the two ends of the reflector, so that the cleaning assembly is driven to clean the upper surface of the reflector to move back and forth, and the cleaning assembly brushes the reflector; in the invention, the component force of the gravity of the cleaning group along the direction of the reflecting mirror and the component force of the gravity of the moving component along the direction of the reflecting mirror are utilized to move the moving component, thereby easily realizing the automatic cleaning of the reflecting mirror and having simple cleaning process; the solar photo-thermal power generation system does not need to be additionally powered to drive cleaning, and the power generation efficiency of the solar photo-thermal power generation system is improved.
The invention adopts another technical scheme that: a solar photo-thermal power generation system comprises the reflector self-cleaning device.
According to the solar photo-thermal power generation system, the self-cleaning device of the reflecting mirror is arranged, so that the self-cleaning device of the reflecting mirror can easily realize the automatic cleaning of the reflecting mirror, and the cleaning process is simple; the solar photo-thermal power generation system does not need to be additionally powered to drive cleaning, and the power generation efficiency of the solar photo-thermal power generation system is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, reference will be made to fig. 1 to 12, which are needed in the description of the embodiments or the prior art, and it is obvious that fig. 1 to 12 in the description below are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a self-cleaning device for a reflector at an up-stop point according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of a partial structure at A in FIG. 1;
FIG. 3 is a schematic diagram of a self-cleaning device for a reflector at a lower stop point according to an embodiment of the present invention;
FIG. 4 is an enlarged schematic view of a partial structure at B in FIG. 3;
FIG. 5 is a schematic cross-sectional view of a mirror self-cleaning device provided in an embodiment of the present invention at an up-stop position with a traction mechanism removed;
FIG. 6 is a schematic cross-sectional view of a mirror self-cleaning device provided in an embodiment of the present invention at a lower stop point with a traction mechanism removed;
FIG. 7 is a schematic diagram of a moving assembly and a cleaning assembly according to an embodiment of the present invention;
FIG. 8 is an enlarged schematic view of a partial structure at C in FIG. 7;
FIG. 9 is a schematic diagram showing the stress at the upper stop point when the mirror self-cleaning device provided by the embodiment of the invention has no magnetic adsorption effect;
FIG. 10 is a schematic diagram of stress at a lower stop point when the mirror self-cleaning device provided by the embodiment of the invention has no magnetic adsorption effect;
FIG. 11 is a schematic diagram of a reflector self-cleaning device according to an embodiment of the present invention with magnetic attraction at an upper stop point;
fig. 12 is a schematic diagram of stress at a lower stop point when the self-cleaning device for a reflector provided by the embodiment of the invention has a magnetic adsorption effect.
Wherein, each reference sign in the figure:
1-mirror 10-moving assembly 11-fixed plate
12- -upper roller 13- -lower roller 14- -connecting plate
141- -connecting hole 20- -cleaning component 21- -connecting rod
22-third magnetic attraction piece 23-fourth magnetic attraction piece 24-cleaning brush
30- -traction mechanism 31- -housing 32- -traction rope
40- -fixing frame 41- -fixing portion 42- -mounting portion
51- -upper flap 512- -upper connection 513- -upper gear portion
52-lower baffle 522-lower connecting portion 523-lower gear portion
511-first magnetic attraction member 521-second magnetic attraction member 53-cushion pad.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate an azimuth or a positional relationship based on that shown in the drawings, it is used merely for convenience in describing the invention and to simplify the description and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; it may be a mechanical connection that is made, or may be an electrical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that, the upper end and the lower end of a certain component mentioned below refer to the relatively higher end and the relatively lower end of the component.
As shown in fig. 1 to 12, the embodiment of the invention provides a self-cleaning device for a reflecting mirror, which is applied to a solar photo-thermal power generation system and used for automatically cleaning the reflecting mirror 1, wherein in the solar photo-thermal power generation system, sunlight is reflected through a heliostat frame, the reflecting mirror 1 is arranged on a rotating frame on the heliostat frame, and the reflecting mirror 1 swings along with the rotation of the rotating frame. The self-cleaning device for the reflector is used for cleaning the swingable reflector 1, and comprises two groups of moving assemblies 10 and cleaning assemblies 20, wherein two sides of each cleaning assembly 20 are respectively connected with the two moving assemblies 10, each moving assembly 10 comprises a fixed plate 11 and a roller group rotatably arranged on the fixed plate, the two fixed plates 11 are respectively positioned at two opposite sides of the reflector 1, and the two roller groups are in contact with the surface of the reflector 1; when the reflector 1 swings, the two roller sets roll back and forth along the surface of the reflector 1 along with the angle change of the reflector 1 and the horizontal plane, and the two fixing plates 11 drive the cleaning assembly 20 to be attached to the upper surface of the reflector 1 so as to clean the upper surface of the reflector 1. On the heliostat frame, the rotating frame rotates to track the sun, the reflecting mirror 1 swings along with the rotation of the rotating frame around the rotating shaft, when the reflecting mirror 1 swings greatly, the heights of the two ends of the reflecting mirror 1 change alternately, the two moving assemblies 10 utilize the height changes of the two ends of the reflecting mirror 1 to enable the two moving assemblies 10 to move back and forth between the two ends along the edges of the two sides of the reflecting mirror 1 respectively, so that the cleaning assembly 20 is driven to clean and move back and forth on the upper surface of the reflecting mirror 1, and the cleaning assembly 20 brushes the reflecting mirror 10. In the embodiment, the component force of the gravity of the cleaning group along the direction of the reflector 1 and the component force of the gravity of the moving assembly 10 along the direction of the reflector 1 are utilized to move the moving assembly 10, so that the automatic cleaning of the reflector 1 is easily realized, and the cleaning process is simple; the solar photo-thermal power generation system does not need to be additionally powered to drive and clean, and the power generation efficiency of the solar photo-thermal power generation system is improved.
In this embodiment, the two sides of the cleaning assembly 20 refer to the side of the cleaning assembly 20 adjacent to one of the moving assemblies 10 and the other side of the cleaning assembly adjacent to the other moving assembly, respectively. When the two ends of the cleaning assembly 20 in the length direction respectively span the two moving assemblies 10, the two sides of the cleaning assembly 20 are the two ends of the cleaning assembly 20.
Further, the rotating angle ranges of the rotating frames on the heliostat frames at different positions are different, the swinging ranges of the reflecting mirrors 1 are different, the angles formed by the reflecting mirrors 1 and the horizontal plane are also different, one end of each reflecting mirror 1 on part of the heliostat frames is always kept high, the other end of each reflecting mirror 1 is kept low, namely, the angle a formed by the reflecting mirrors 1 and the horizontal plane is in the range of 0-90 degrees, and at the moment, the reflecting mirrors 1 on the part of the heliostat frames cannot realize automatic reciprocating cleaning by utilizing gravity. In order to ensure that all the reflectors 1 can be automatically cleaned, the rotating frame can be actively controlled to rotate, so that the heights of the two ends of the reflectors 1 are alternately changed, thereby realizing the automatic cleaning of all the reflectors 1, and the angle range between the reflectors 1 which can be cleaned by the reflector self-cleaning device and the horizontal plane is 90 degrees to-90 degrees.
Further, as shown in fig. 1 and 3, the self-cleaning device for a reflector further includes two traction mechanisms 30, where the two traction mechanisms 30 include a housing 31, a traction rope 32, a coil spring (not labeled in the drawing) and a rotating shaft (not labeled in the drawing), the housing 31 is connected with the reflector 1, the rotating shaft is rotatably disposed in the housing 31, one end of the traction rope 32 is wound around one end of the rotating shaft, the other end of the traction rope 32 is connected with the two fixing plates 11, the coil spring is disposed at the other end of the rotating shaft to drive the rotating shaft to wind the traction rope 32, and the traction mechanism 30 continuously outputs traction force through the traction rope 32 to pull the fixing plates 11 for resetting. Specifically, the traction mechanism 30 is a spring balancer.
When the angle range formed by the reflecting mirror 1 and the horizontal plane is 0-90 degrees, the relatively higher end is the upper end, the upper end is provided with an upper stop point, the relatively lower end is the lower end, and the lower end is provided with a lower stop point. The moving assembly 10 moves back and forth between two ends of the reflector 1, that is, the moving assembly 10 moves back and forth between an upper stop point and a lower stop point, the reflector self-cleaning device can move from the upper stop point to the lower stop point by utilizing self gravity, and the traction mechanism 30 can traction the reflector self-cleaning device to move from the lower stop point to the upper stop point, and the specific process is as follows:
when the angle a of the mirror 1 relative to the horizontal plane 1 When smaller, the mirror self-cleaning device is in the initial position, i.e. resting at the upper stop point, at which time:
G*sina 1 <F p1 +F r wherein G is the gravity of the self-cleaning device of the reflector, F p1 F for traction at the upper stop point of the traction mechanism 30 r To clean the friction between the assembly 20 and the mirror 1.
As the turret rotates, the angle of the mirror 1 with respect to the horizontal becomes larger and reaches a certain value a as shown in fig. 9 2 When (1):
G*sina 2 ≥F p1 +F r wherein G is the gravity of the self-cleaning device of the reflector, F p1 F for traction at the upper stop point of the traction mechanism 30 r To clean the friction between the assembly 20 and the mirror 1.
At this time, the moving assembly 10 starts to move away from the upper stop point and moves toward the lower stop point, and the cleaning assembly 20 cleans the mirror 1 during the movement.
After the moving assembly 10 moves to the lower stop point, the mirror self-cleaning device is completed to clean the mirror 1 from top to bottom. As shown in fig. 10, the angle between the mirror 1 and the horizontal plane becomes smaller gradually when the angle reaches a certain value a after the angle reaches the maximum value as the turret rotates 3 When (1):
G*sina 3 +F r ≤F p2 wherein G is the gravity of the self-cleaning device of the reflector, F p2 F for traction of the traction mechanism 30 at the lower stop point r To clean the friction between the assembly 20 and the mirror 1.
At this time, the moving assembly 10 starts to be separated from the lower stop point, returns upward to the upper stop point, and during the moving process, the cleaning assembly 20 cleans the mirror 1 again, so far, the mirror self-cleaning device completes one reciprocating cleaning under the traction of the traction mechanism 30.
In the present embodiment, the mirror 1 is equal to or greater than a in the horizontal plane 2 When the angle is formed, the gravity of the reflector self-cleaning device is utilized to drive the reflector self-cleaning device to move to the lower stopping point, and when the surface of the reflector 1 and the horizontal plane is smaller than or equal to a 3 At this angle, the mirror self-cleaning device is driven to move to the upper stop point by the traction of the traction mechanism 30. By the traction of the traction mechanism 30, even if one end of the reflector 1 is always kept high and the other end is kept low, the reflector self-cleaning device can be automatically reset, the reflector self-cleaning device continuously and reciprocally cleans the reflector 1, the swinging angle range of the reflector 1 cleaned by the reflector self-cleaning device is increased, and electric energy is not required to be consumed to rotate the rotating frame.
In particular, traction mechanism 30 may also be a pushrod requiring electrical input, or a spring balancer that does not require electrical input. The preferred spring balancer of this embodiment is that the hauling cable 32 of the spring balancer is a wire rope through which the moving assembly 10 is connected. The heliostat frame is originally used for generating electricity, the spring balancer does not need to consume power, traction force can be continuously provided, and the generating efficiency is improved.
Further, as shown in fig. 2 and 4, the self-cleaning device for a reflecting mirror further includes a fixing frame 40 for fixing the housing 31, the fixing frame 40 includes a fixing portion 41 and a mounting portion 42 connected to the fixing portion 41, the fixing portion 41 is tightly attached to an end of the reflecting mirror 1 and fixedly connected to the end of the reflecting mirror 1, and the housing 31 is fixed to the mounting portion 42. Specifically, the fixing portion 41 is vertically connected to the mounting portion 42, and the housing 31 is fixedly mounted to one side of the mounting portion 42.
Further, the two moving assemblies 10 further comprise a connecting plate 14, the connecting plate 14 is arranged at the lower part of the fixed plate 11 and is perpendicular to the fixed plate, a connecting hole 141 is formed in the connecting plate 14, and the hauling rope 32 is arranged on the connecting hole 141 in a penetrating mode and is fixedly connected with the connecting plate 14 through the connecting hole 141. Specifically, the connection plate 141 and the fixing plate 11 are an integral structure formed of sheet metal.
Further, in the moving assembly 10, the fixed plate 11 moves with the roller group. Specifically, the fixing plate 11 is disposed perpendicular to the reflecting mirror 1, and the roller set is disposed on a side surface of the fixing plate 11, which is close to the reflecting mirror 1.
Further, as shown in fig. 5 and 6, each of the two roller sets includes two upper rollers 12 and two lower rollers 13, the two upper rollers 12 are fixed on the corresponding fixing plates 11 and located on the upper surface of the reflecting mirror 1, and the two lower rollers 13 are fixed on the corresponding fixing plates 11 and located on the lower surface of the reflecting mirror 1. The two upper rollers 12 roll along the edge of the mirror 1, while the two lower rollers 13 serve to limit the position of the mirror 1 to the cleaning assembly 20, maintaining the cleaning assembly 20 in effective contact with the mirror 1, ensuring that the cleaning assembly 20 can effectively clean the mirror 1 when the moving assembly 10 moves.
In this embodiment, the roller set may further include two upper rollers 12 and a limiting slider (not shown in the figure), by which the position of the mirror 1 is limited.
In this embodiment, the moving component 10 may also be a sliding block (not shown in the figure) that moves along the edge of the reflecting mirror 1, two ends of the cleaning component 20 are respectively connected with the two sliding blocks, the sliding block is provided with a sliding groove, the sliding groove is sleeved on the edge of the reflecting mirror 1, and the moving component 10 is realized to move along the edge of the reflecting mirror 1 by matching the sliding groove with the edge of the reflecting mirror 1.
Further, as shown in fig. 5 and 6, the upper end of the mirror 1 is provided with an upper baffle plate 51, the upper baffle plate 51 is used for limiting the movement of the cleaning assembly 20 to the upper end of the mirror 1, so that the mirror self-cleaning device stops at an upper stop point, the lower end of the mirror 1 is provided with a lower baffle plate 52, and the lower baffle plate 52 is used for limiting the movement of the cleaning assembly 20 to the lower end of the mirror 1, so that the mirror self-cleaning device stops at a lower stop point. More specifically, the upper end of the reflecting mirror 1 is provided with two upper blocking pieces 51, the two upper blocking pieces 51 are positioned at the uppermost end of the moving path of the cleaning assembly 20, the lower end of the reflecting mirror 1 is provided with two lower blocking pieces 52, and the two lower blocking pieces 52 are positioned at the lowermost end of the moving path of the cleaning assembly 20. The upper end and the lower end of the reflector 1 are limited in distance, and the upper baffle plate 51 and the lower baffle plate 52 limit the moving range of the reflector self-cleaning device, so that the reflector self-cleaning device is prevented from moving out of the reflector 1.
Further, as shown in fig. 5 and 6, the two upper baffle plates 51 are respectively provided with a first magnetic attraction piece 511 for attracting the cleaning assembly 20 when the self-cleaning device of the reflecting mirror moves to the upper stop point, and the two lower baffle plates 52 are respectively provided with a second magnetic attraction piece 521 for attracting the cleaning assembly 20 when the self-cleaning device of the reflecting mirror moves to the lower stop point. Specifically, the first and second magnetic attraction pieces 511 and 521 are respectively attached to the connecting rod 21 in the following cleaning assembly 20 by suction, and the connecting rod 21 is made of iron.
Alternatively, as shown in fig. 5 and 6, the cleaning assembly 20 is provided with a third magnetic attraction piece 22 and a fourth magnetic attraction piece 23 on both sides, specifically, the cleaning assembly 20 is provided with the third magnetic attraction piece 22 for being in attraction connection with the first magnetic attraction piece 511 on the side facing the upper baffle plate 51, and the cleaning assembly is provided with the fourth magnetic attraction piece 23 for being in attraction connection with the second magnetic attraction piece 521 on the side facing the lower baffle plate 52. The third magnetic attraction piece 22 is used for being in attraction connection with the first magnetic attraction piece 511 when the reflector self-cleaning device moves to the upper stop point, and the fourth magnetic attraction piece 23 is used for being in attraction connection with the second magnetic attraction piece 521 when the reflector self-cleaning device moves to the lower stop point. While the cleaning assembly 20 may be manufactured from a non-magnetic material, hereinafter the connecting rod 21 is manufactured from a non-magnetic material.
Both the upper baffle 51 and the lower baffle 52 are magnetically attached to the cleaning assembly 20, and the cleaning assembly 20 can more quickly clean the mirror 1. The specific process is as follows:
at the upper stop point, when the angle a of the reflector 1 relative to the horizontal plane 4 When smaller, the mirror self-cleaning device is in the initial position, i.e. resting at the upper stop point, at which time:
G*sina 4 <F p1 +F r +F m1 wherein G is the gravity of the self-cleaning device of the reflector, F p1 F for traction at the upper stop point of the traction mechanism 30 m1 F is the magnetic adsorption force applied to the self-cleaning device of the upper stop point reflector r To clean the friction between the assembly 20 and the mirror 1.
As shown in fig. 11, as the turret rotates, the angle of the mirror 1 with respect to the horizontal plane becomes larger and reaches a certain value a 5 When (1):
G*sina 5 ≥F p1 +F r +F m1 wherein G is the gravity of the self-cleaning device of the reflector, F p1 F for traction at the upper stop point of the traction mechanism 30 m1 F is the magnetic adsorption force applied to the self-cleaning device of the upper stop point reflector r To clean the friction between the assembly 20 and the mirror 1.
At this time, the moving assembly 10 starts to be separated from the upper stop point, the magnetic attraction force is rapidly reduced to 0 along with the downward movement of the moving assembly 10, the mirror self-cleaning device accelerates to the lower stop point, and the cleaning assembly 20 cleans the mirror 1 during the movement.
After the moving assembly 10 moves to the lower stop point, the mirror self-cleaning device is completed to clean the mirror 1 from top to bottom. As shown in fig. 12, the angle between the mirror 1 and the horizontal plane becomes smaller gradually when the angle reaches a certain value a after the angle reaches the maximum value as the turret rotates 6 When (1):
G*sina 6 +F r +F m2 ≤F p2 wherein G is the gravity of the self-cleaning device of the reflector, F p2 F for traction of the traction mechanism 30 at the lower stop point m2 F is the magnetic adsorption force of the lower stop point reflector self-cleaning device r To clean the friction between the assembly 20 and the mirror 1Wiping force.
At this time, the moving assembly 10 starts to separate from the lower stop point, the magnetic attraction force is rapidly reduced to 0 along with the upward movement of the moving assembly 10, the mirror self-cleaning device is accelerated to return to the upper stop point, and the cleaning assembly 20 cleans the mirror 1 again during the movement, so that the mirror self-cleaning device completes one-time reciprocating cleaning under the traction of the traction mechanism 30.
In this embodiment, the first magnetic attraction piece 511 and the second magnetic attraction piece 521 are added, or the first magnetic attraction piece 511, the second magnetic attraction piece 521, the third magnetic attraction piece 22 and the fourth magnetic attraction piece 23 are added, and the mirror self-cleaning device moves back and forth while being under the traction and magnetic attraction force of the traction mechanism 30. When the moving component 10 is far away from the upper baffle plate 51 and the lower baffle plate 52, the stress of the reflector self-cleaning device is unbalanced due to the rapid reduction of the magnetic adsorption force, and the reflector self-cleaning device has larger acceleration in the reciprocating movement process, so that the cleaning component 20 can rapidly sweep the reflector 1, the residence time of the cleaning component 20 in the middle of the reflector 1 is reduced, and the influence of the cleaning component 20 on light reflection is avoided; the first magnetic attraction member 511 can firmly attract the cleaning assembly 20 when cleaning of the mirror 1 is not required, preventing the moving assembly 10 from moving at will.
Further, in order to avoid the first magnetic attraction piece 511 and the third magnetic attraction piece 22 from being broken due to collision and to avoid the second magnetic attraction piece 521 and the fourth magnetic attraction piece 23 from being broken due to collision, in this embodiment, the first magnetic attraction piece 511 and the second magnetic attraction piece 521 are both soft magnets; alternatively, the third magnetic attraction piece 22 and the fourth magnetic attraction piece 23 are both soft magnets; alternatively, the first magnetic attraction piece 511, the second magnetic attraction piece 521, the third magnetic attraction piece 22, and the fourth magnetic attraction piece 23 are all soft magnets.
Further, in order to buffer the collision of the magnetic attraction pieces and to slow down the vibration of the self-cleaning device of the reflecting mirror, in this embodiment, the outer surfaces of the first magnetic attraction piece 511 and the second magnetic attraction piece 521 are both provided with a buffer pad 53; alternatively, the outer surfaces of the third magnetic attraction piece 22 and the fourth magnetic attraction piece 23 are respectively provided with a buffer pad 53; alternatively, the outer surfaces of the first magnetic attraction piece 511, the second magnetic attraction piece 521, the third magnetic attraction piece 22 and the fourth magnetic attraction piece 23 are provided with the cushion pad 53.
Alternatively, in other embodiments of the upper and lower blocking plates 51 and 52, two upper blocking plates 51 are used to limit the upper stop point of the moving assembly 10, two lower blocking plates 52 are used to limit the lower stop point of the moving assembly 10, and two upper blocking plates 51 and two lower blocking plates 52 of the reflecting mirror 1 are respectively opposite to the two moving assemblies 10. The two upper baffle plates 51 are respectively provided with a first magnetic attraction piece 511, the two lower baffle plates 52 are respectively provided with a second magnetic attraction piece 521, the first magnetic attraction piece 511 and the second magnetic attraction piece 521 are respectively in adsorption connection with the fixed plate 11 in the moving assembly 10, and the fixed plate 11 is made of magnetic materials; or the moving assembly 10 is provided with a third magnetic attraction piece 22 and a fourth magnetic attraction piece 23 at two ends respectively, a second magnetic attraction piece 521 which is in attraction connection with the first magnetic attraction piece 511 is arranged on the moving assembly, at this time, the moving assembly 10 may be manufactured of a non-magnetic material, i.e., the fixing plate 11 is manufactured of a non-magnetic material.
Further, as shown in fig. 7 and 8, the cleaning assembly 20 includes a connection rod 21 and cleaning brushes 24 distributed along the length direction of the connection rod 21 for brushing the reflecting mirror 1, and both ends of the connection rod 21 are respectively connected with the fixing plates 11 of the two moving assemblies 10. The cleaning brush 24 is fixed by the connecting rod 21, and the cleaning brush 24 sweeps the reflecting mirror 1 to clean the reflecting mirror 1.
Further, as shown in fig. 6, the fixing plate 11 is disposed along the edge of the reflecting mirror 1, the roller set is disposed at the upper end of the fixing plate 11, the cleaning assembly 20 is connected to the lower end of the fixing plate 11, the upper blocking piece 51 includes an upper connection portion 512 and an upper blocking portion 513, and the lower blocking piece 52 includes a lower connection portion 522 and a lower blocking portion 523. One end of the lower connecting portion 522 is fixed to the lower surface of the lower end of the mirror 1, and the other end of the lower connecting portion 501 extends outward of the mirror 1, and the lower gear portion 523 is provided at the end of the lower connecting portion 522; the upper connecting portion 512 is closely attached to the upper surface of the reflecting mirror 1, and the upper gear portion 513 is provided at one end of the upper connecting portion 512 near the middle of the reflecting mirror 1. When the lower connecting portion 522 extends out of the mirror 1 and the cleaning assembly 20 abuts against the lower gear portion 523, the cleaning assembly 20 is partially or entirely located outside the mirror 1, and the cleaning brush 24 is partially or entirely swept outside the mirror, so that dust accumulated by the cleaning brush 24 can naturally drop, especially when the cleaning brush 24 sweeps out of the mirror, the bristles on the cleaning brush 24 are thrown out of the mirror 1 from the edge of the mirror 1, and the dust can be effectively thrown out. By setting the length of the lower connecting portion 522, the cleaning brush 24 can be completely swept out of the mirror 1 when the mirror self-cleaning device moves to the lower stop point, so as to completely throw off dust on the cleaning brush 24 everywhere.
The embodiment also provides a solar photo-thermal power generation system, which comprises a plurality of heliostat frames, a receiver and a reflector self-cleaning device, wherein each heliostat frame is used for fixedly installing the reflector 1 and is distributed around the receiver, the receiver is used for receiving sunlight reflected by each reflector, and the reflector self-cleaning device is used for automatically cleaning the reflector. The solar photo-thermal power generation system provided by the invention has the advantages that the self-cleaning device for the reflecting mirror is arranged, so that the automatic cleaning of the reflecting mirror 1 can be easily realized, and the cleaning process is simple; the solar photo-thermal power generation system does not need to be additionally powered to drive cleaning, and the power generation efficiency of the solar photo-thermal power generation system is improved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (8)
1. A self-cleaning device for a mirror for cleaning a swingable mirror, characterized in that: the reflector self-cleaning device comprises two groups of moving assemblies and cleaning assemblies, wherein two sides of each cleaning assembly are respectively connected with the two moving assemblies, each moving assembly comprises a fixed plate and a roller group which is rotatably arranged on the fixed plate, the two fixed plates are respectively positioned on two opposite sides of the reflector, and each roller group is contacted with the surface of the reflector; when the reflector swings, the two roller assemblies roll back and forth along the surface of the reflector respectively, the two fixing plates drive the cleaning assembly to be attached to the upper surface of the reflector so as to clean the upper surface of the reflector, the reflector self-cleaning device further comprises two traction mechanisms, the two traction mechanisms comprise a shell, a coil spring, a rotating shaft and a traction rope, the shell is connected with the reflector, the rotating shaft is rotatably arranged in the shell, one end of the traction rope is wound at one end of the rotating shaft, the other end of the traction rope is connected with the fixing plate, the coil spring is arranged at the other end of the rotating shaft so as to drive the rotating shaft to wind the traction rope, the traction rope continuously outputs traction force so as to pull the fixing plate to reset, each roller assembly comprises two upper rollers and two lower rollers, the two upper rollers are fixed on the corresponding fixing plates and are located on the upper surface of the reflector, and the two lower rollers are fixed on the corresponding fixing plates and are located on the lower surface of the reflector.
2. A mirror self-cleaning device according to claim 1, characterized in that: the reflector self-cleaning device further comprises a fixing frame used for fixing the shell, the fixing frame comprises a fixing portion and a mounting portion connected with the fixing portion, the fixing portion is clung to the end portion of the reflector and is fixedly connected with the end portion of the reflector, and the shell is fixed to the mounting portion.
3. A mirror self-cleaning device according to any one of claims 1 to 2, characterized in that: the upper end of the reflector is provided with an upper baffle for limiting the cleaning assembly to move towards the upper end of the reflector, and the lower end of the reflector is provided with a lower baffle for limiting the cleaning assembly to move towards the lower end of the reflector.
4. A mirror self-cleaning device according to claim 3, characterized in that: the cleaning assembly comprises an upper baffle plate, a cleaning assembly and a cleaning assembly, wherein the upper baffle plate is provided with a first magnetic attraction piece, and a third magnetic attraction piece which is used for being in adsorption connection with the first magnetic attraction piece is arranged on one side of the cleaning assembly, facing the upper baffle plate; the cleaning assembly comprises a lower baffle plate, wherein a first magnetic attraction piece is arranged on the lower baffle plate, and a second magnetic attraction piece is arranged on one side of the cleaning assembly, facing the lower baffle plate, and is used for being in attraction connection with the first magnetic attraction piece.
5. A mirror self-cleaning device according to claim 4, characterized in that: the outer surface of the third magnetic attraction piece and the outer surface of the fourth magnetic attraction piece are both provided with buffer pads.
6. A mirror self-cleaning device according to claim 3, characterized in that: the lower baffle is fixed on the lower surface of the lower end of the reflector, and the lower baffle extends outwards of the reflector so that the cleaning assembly partially or completely moves out of the reflector when the cleaning assembly is abutted with the lower baffle.
7. A mirror self-cleaning device according to any one of claims 1 to 2, characterized in that: the cleaning assembly comprises a connecting rod and cleaning brushes, two ends of the connecting rod are connected with the two fixing plates respectively, and the cleaning brushes are fixed on the connecting rod and distributed along the length direction of the connecting rod so as to brush the reflecting mirror.
8. A solar photo-thermal power generation system, characterized in that it comprises a mirror self-cleaning device according to any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710607675.6A CN109290235B (en) | 2017-07-24 | 2017-07-24 | Self-cleaning device for reflecting mirror solar photo-thermal power generation system |
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| CN201710607675.6A CN109290235B (en) | 2017-07-24 | 2017-07-24 | Self-cleaning device for reflecting mirror solar photo-thermal power generation system |
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| CN109290235B true CN109290235B (en) | 2023-10-10 |
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| TW201117310A (en) * | 2009-11-06 | 2011-05-16 | Hon Hai Prec Ind Co Ltd | Solar panel cleaning system |
| JP2011194275A (en) * | 2010-03-17 | 2011-10-06 | Konica Minolta Opto Inc | Mirror surface cleaning device |
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