CN210954742U

CN210954742U - Sunlight tracking device of tower type solar power generation system

Info

Publication number: CN210954742U
Application number: CN201921649881.4U
Authority: CN
Inventors: 何开浩
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2020-07-07
Anticipated expiration: 2029-09-29

Abstract

The utility model relates to a sunlight tracking device of a tower-type solar power generation system, which comprises a heliostat, a column, a beam, a reference mirror assembly, a detection mirror assembly and a light detector, wherein the reference mirror assembly is arranged at the back of the heliostat and synchronously rotates along with the column, and is used for receiving laser beams irradiated towards the central direction of a heat collector and reflecting the laser beams; the light detector is used for detecting whether the laser ray reflected by the reference mirror assembly is consistent with the direction of the solar ray reflected by the detection mirror assembly and reflected by the heliostat. When the direction of the solar ray reflected by the heliostat is the same as that of the reference laser beam, the heliostat is proved to accurately reflect the solar ray, and when the deviation of the solar ray reflected by the heliostat and the direction of the reference laser beam is detected, the angle of the heliostat is adjusted, so that the heliostat can be accurately focused with the solar condenser all the time.

Description

Sunlight tracking device of tower type solar power generation system

Technical Field

The utility model relates to a solar energy power generation technical field specifically indicates a tower solar electric system's sunlight tracking means.

Background

Solar energy is an energy source with low distribution density and intermittent and spatial distribution which change all the time, and is greatly different from the conventional energy sources familiar to people in life, so that higher requirements are put on the collection and utilization of the solar energy. At present, the most widely used solar energy is a solar water heater, but the solar water heater can only meet the daily life requirements of people, has limited water heating degree and cannot meet the industrial requirements of high-temperature hot water and steam. In order to meet the higher requirements of people on solar heat utilization, a solar heat collector is required to absorb solar radiation energy more effectively.

Common solar power generation modes include a disc type, a tower type, a groove type and a linear Fresnel mode, wherein the tower type system has the advantages primarily shown by the characteristics of large scale, small heat loss, high temperature and the like. The tower type solar thermal power generation system mainly comprises a light condensation system, a heat absorption and exchange system, a heat storage system and a power generation system, wherein the light condensation system comprises a reflector, a supporting structure, a transmission device and a tracking control system. The reflector is used for collecting solar radiation energy and converging the solar radiation energy to the heat collector and comprises heliostats which are arranged in a certain mode and can track around double shafts, and each heliostat tracks the sun by rotating around a shaft and reflects the solar energy radiated to the surface of the heliostat to the heat collector at the top of the tower so as to fulfill the aim of light condensation. The tower type solar thermal power generation system adopts a light-heat-electricity conversion process route, namely, solar energy is converted into heat energy, and then the heat energy is converted into electric energy. The solar energy staged and segmented heating is adopted, a common solar heat collector is adopted to heat water at a low section, then the water is heated to a medium temperature by a light-gathering solar heat collector, and then the water is heated to a high temperature by a tracking light-gathering solar high-temperature heater. The high-temperature steam drives a turbine generator to generate electricity, and high-efficiency thermoelectric conversion is realized. The core part in a tower solar thermal power plant, whether from the point of view of the efficiency of the concentration system, the collection efficiency or the cost of the whole plant, is how to make the heliostats automatically track the sun rotation precisely and maximize the solar energy radiated to its surface.

The prior application CN200910155646.6 of the applicant, namely a light-gathering aiming device of a tower type solar thermal power generation system, discloses a structure, which comprises a laser beam generator, a light-taking projection mechanism and a projection driving mechanism; the laser beam generator is arranged at the moving center of the heliostat, namely at the rotating center of a reflecting mirror of the solar condenser, and sequentially emits laser beams aligned to the high-tower solar cooker, namely the center direction of the heat collector; the light-taking projection mechanism and the projection driving mechanism are arranged near the laser beam light path, the light-taking projection mechanism is a projection reflecting mirror or a refraction mirror, when the laser beam generator emits laser beams, the projection driving mechanism drives the light-taking projection mechanism to move to the light path of the laser beams, and the laser beams are reflected or refracted to the light detection screen through the light-taking projection mechanism. The structure takes the laser beam aligned with the focusing target as a standard, and the direction of the sunlight reflected light of each solar condenser is projected and compared with the direction of the laser beam in a time-sharing manner according to the movement of the sun so as to change the rotation angle of the solar condenser, so that the sunlight reflected light is consistent with the direction of the laser beam, and the accurate focusing is realized.

The light-gathering sighting device can project and sample the laser beam and the solar reflection light, so that the tower type solar thermal power generation system does not need to obtain the rotation angle of the solar light gathering device through mathematical calculation, and the large-scale application of the tower type solar thermal power generation system is promoted. However, since the mirror surface is inclined when the heliostat is operated, the heliostat affects the position in the vertical direction when adjusting the horizontal direction, and affects the position in the horizontal direction when adjusting the vertical direction. In order to avoid the influence, the light-gathering sighting device needs to be installed in front of the heliostat, the heliostat generally comprises dozens of mirror surfaces, the area of the heliostat reaches hundreds of square meters, the existing structure is adopted, the light-gathering sighting device is difficult to install, and unless a vertical rod for installing the light-gathering sighting device is installed in front of the heliostat, the cost is increased, and the light-gathering sighting device and the heliostat are inconvenient to operate.

Therefore, the sunlight tracking device of the current tower type solar power generation system is to be further improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to prior art's current situation, provide a tower solar electric system's sunlight tracking device convenient to installation and ability accurate focus.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a tower solar electric system's sunlight tracking means, includes heliostat, stand and crossbeam, the heliostat slope is arranged and the back is installed on the crossbeam, the crossbeam can be followed self axial and is located on the stand with rotating, stand vertical arrangement can be followed self axial and is located the holding surface with rotating on, its characterized in that: also comprises

The reference mirror assembly is arranged at the back of the heliostat, synchronously rotates along with the upright column, and is used for receiving and reflecting the laser beam irradiated to the center direction of the heat collector;

the detection mirror assembly is arranged on the front side of the heliostat and synchronously rotates along with the upright column, and is used for receiving and reflecting the solar rays reflected by the heliostat; and

and the photodetectors are arranged on the reference mirror assembly and the detection mirror assembly and are used for detecting whether the directions of the laser rays reflected by the reference mirror assembly and the solar rays reflected by the detection mirror assembly and reflected by the heliostat are consistent or not.

The reference mirror assembly comprises a horizontal reference mirror and a vertical reference mirror, the horizontal reference mirror is horizontally arranged at the back of the heliostat, and the vertical reference mirror is vertically arranged at the back of the heliostat and is arranged perpendicular to the heliostat; the detection mirror assembly comprises a horizontal detection mirror and a vertical detection mirror, the horizontal detection mirror is horizontally arranged on the front side of the heliostat, and the vertical detection mirror is vertically arranged on the front side of the heliostat and is arranged perpendicular to the heliostat. By adopting the structure, the horizontal reference mirror gives the horizontal detection mirror for comparison, and the vertical reference mirror gives the vertical detection mirror for comparison, so that whether the propagation directions of the sunlight reflected by the heliostat are the same as the propagation directions of the reference laser beams or not is measured, if the directions are the same, the tracking position of the heliostat to the sunlight is accurate, and if the directions are different, the tracking position of the heliostat to the sunlight is deviated, and the adjustment is needed, so that the tracking of the sunlight is more visual, the traditional calculation method is not relied on, and the method is more convenient.

In the above scheme, the horizontal reference mirror, the vertical reference mirror, the horizontal detection mirror and the vertical detection mirror have the same structure and respectively comprise a transparent glass plate, and a first reflective layer and a second reflective layer which are parallel to each other, the transparent glass plate is disc-shaped, the first reflective layer is arranged on the first wall surface of the transparent glass plate, the reflective surfaces of the first reflective layer are arranged inwards, and the holes of the horizontal reference mirror and the vertical reference mirror are positioned on the central axis extension line of the column. The second reflecting layer is arranged on the second wall surface of the transparent glass plate, the reflecting surface of the second reflecting layer faces the first reflecting layer, and a hole through which light can pass is formed in the middle of the first reflecting layer and/or the second reflecting layer; and in the assembled state, the horizontal reference mirror and the horizontal detection mirror have the same direction of the hole, and the vertical reference mirror and the vertical detection mirror have the same direction of the hole. By adopting the structure, the shooting direction of the light can be accurately fed back so as to accurately track the direction of the solar light.

In order to facilitate assembly, a first support frame used for mounting a horizontal reference mirror and a vertical reference mirror is arranged at the top of the upright column, the horizontal reference mirror is supported on the upright column through the first support frame and is horizontally arranged, and the edge of the vertical reference mirror is constrained on the first support frame and is vertically arranged at intervals with the horizontal reference mirror. The horizontal detection mirror and the vertical detection mirror are constrained on the first supporting rod at vertical intervals, the front end of the second supporting rod is connected with the first supporting rod, and the rear end of the second supporting rod penetrates through the heliostat to be connected with the stand column. The utility model discloses in adopted above-mentioned mounting means, in fact, the position of arranging about horizontal mirror and perpendicular mirror is unrestricted, its mounting means is also unrestricted.

Preferably, the heliostat is provided with a gap for the second supporting rod to pass through and allowing the heliostat to turn relative to the second supporting rod. The heliostat is formed by arranging a plurality of reflectors, a gap exists between every two adjacent reflectors, the gap meets the requirements, and the turnover of the heliostat is not influenced by mounting structures such as a second supporting rod.

In each of the above schemes, the sunlight tracking device further includes a standby reference mirror and a standby detection mirror having the same structures as the horizontal reference mirror, the vertical reference mirror, the horizontal detection mirror and the vertical detection mirror, the standby reference mirror is vertically disposed at the back of the heliostat and forms an included angle with the vertical reference mirror, and the hole of the standby reference mirror is located on an extension line of the central axis of the upright column. The spare detection mirror is vertically arranged on the front side of the heliostat and forms an included angle with the vertical detection mirror, and the spare reference mirror and the spare detection mirror are both provided with photodetectors capable of detecting the emission positions of the reflected light rays. Preferably, the included angles formed between the standby reference mirror and the vertical reference mirror and between the standby detection mirror and the vertical detection mirror are the same and are 10-20 degrees. Because the sunlight changes direction all the time during a day, and therefore, the vertical mirror completely vertical to the heliostat can not accurately feed back the light direction at some time possibly, the standby reference mirror and the standby detection mirror are arranged, so that the light can be tracked when the vertical reference mirror and the vertical detection mirror can not feed back the light direction, and the use is not influenced.

Preferably, the photodetectors are arranged along a circumferential direction of the horizontal reference mirror, the vertical reference mirror, the horizontal detection mirror, the vertical detection mirror, the standby reference mirror, and the standby detection mirror. By adopting the structure, the position of the reflected light rays at each position can be ensured to be detected, and the direction of the light rays can be accurately tracked.

Compared with the prior art, the utility model has the advantages of: the sun-tracking device comprises a heat collector, a light detector, a laser beam, a heliostat and a solar condenser, wherein the light collector is used for collecting sunlight reflected by the heliostat, the laser beam irradiates towards the center direction of the heat collector, the direction of the laser beam represents the direction of the solar condenser on a high tower, the sun light reflected by the heliostat can be accurately reflected, the laser beam is taken as a reference, when the light detector detects that the direction of the sun light reflected by the heliostat is the same as that of the laser beam, the heliostat is proved to accurately reflect the sun light, and if the light detector detects that the direction of the sun light reflected by the heliostat is deviated from that of the laser beam, the angle of the heliostat; and simultaneously, the utility model discloses simple structure, be convenient for install and use.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a side view of FIG. 1;

fig. 3 is a schematic structural diagram of a horizontal reference mirror/a vertical reference mirror/a horizontal detection mirror/a vertical detection mirror in an embodiment of the present invention;

FIG. 4 is a schematic diagram showing the structure of the reflection path of light in the horizontal reference mirror/vertical reference mirror/horizontal detection mirror/vertical detection mirror;

fig. 5 is a schematic diagram of a position relationship structure between the vertical reference mirror and the standby reference mirror according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 5, the sunlight tracking device of the tower-type solar power generation system according to the present embodiment includes a heliostat 1, a column 2, a beam 3, a reference mirror assembly 4, a detection mirror assembly 5, and a photodetector 6.

As shown in fig. 1, the heliostat 1 is arranged obliquely and the back of the heliostat is mounted on the cross beam 3, the edges of both sides of the heliostat 1 are mounted with brackets extending backwards, the brackets are fixed on the cross beam 3, the cross beam 3 can be arranged on the upright post 2 in a way of rotating along the self axial direction, and the cross beam 3 can be mounted at the upper end of the upright post 2 through structures such as an adapter. The upright post 2 is vertically arranged and can be arranged on the ground in a rotating mode along the axial direction of the upright post, a rotating sleeve can be arranged on the ground, and the upright post 2 can be rotatably inserted into the top of the rotating sleeve. And a driving mechanism capable of driving the beam 3 and the upright post 2 to rotate is arranged at the same time. The above structures are all the existing mature technologies and are not described herein.

The reference mirror assembly 4 of the present embodiment is disposed at the back of the heliostat 1 and rotates synchronously with the upright post 2, and is configured to receive and reflect the laser beam irradiated toward the center of the heat collector. It should be noted that, in the prior application CN200910155646.6 "light-gathering sighting device of tower-type solar thermal power generation system", the laser beam emitter is disposed at the active center of the heliostat, whereas in the present embodiment, the laser beam emitter is not disposed on the heliostat, but disposed at the back side of the heliostat, which is at a larger distance from the heliostat, but still it is necessary to ensure that the reference laser beam emitted by the laser beam emitter is directed to the center of the heat collector on the tower, and the laser beam emitter is disposed at the back side of the heliostat to facilitate the emission of the laser beam to the reference mirror. The detection mirror assembly 5 is arranged on the front side of the heliostat 1, synchronously rotates along with the upright post 2, and is used for receiving and reflecting the solar rays reflected by the heliostat. The light detector 6 is arranged on the reference mirror assembly 4 and the detection mirror assembly 5 and is used for detecting whether the laser ray reflected by the reference mirror assembly 4 is consistent with the direction of the solar ray reflected by the detection mirror assembly 5 and reflected by the heliostat.

The reference mirror assembly 4 of the present embodiment includes a horizontal reference mirror 41 and a vertical reference mirror 42, the horizontal reference mirror 41 is horizontally disposed on the back of the heliostat 1, the vertical reference mirror 42 is vertically disposed on the back of the heliostat 1, and the vertical reference mirror 1 is disposed. The detection mirror assembly 5 of the present embodiment includes a horizontal detection mirror 51 and a vertical detection mirror 52, the horizontal detection mirror 51 is horizontally disposed on the front side of the heliostat 1, the vertical detection mirror 52 is vertically disposed on the front side of the heliostat 1, and the vertical detection mirror 1 is disposed. The horizontal reference mirror 41 is used for comparing with the horizontal detection mirror 51, and the vertical reference mirror 42 is used for comparing with the vertical detection mirror 52, so that whether the propagation directions of the sunlight reflected by the heliostat and the reference laser beam are the same or not is measured, if the propagation directions are the same, the tracking position of the heliostat 1 to the sunlight is accurate, and if the propagation directions are different, the tracking position of the heliostat 1 to the sunlight is deviated, and adjustment is needed, so that the tracking of the sunlight is more visual, the method is not dependent on the existing calculation method, and is more convenient.

As shown in fig. 3 and 4, the horizontal reference mirror 41, the vertical reference mirror 42, the horizontal detection mirror 51, and the vertical detection mirror 52 of the present embodiment have the same structure, and each of the horizontal reference mirror 41, the vertical reference mirror 42, the horizontal detection mirror 51, and the vertical detection mirror 52 includes a transparent glass plate 10, and a first reflective layer 101 and a second reflective layer 102 that are parallel to each other, the transparent glass plate 10 is in a thin cylindrical shape, the first reflective layer 101 is disposed on a first wall surface of the transparent glass plate 10, and the reflective surface is disposed inward, the second reflective layer 102 is disposed on a second wall surface of the transparent glass plate 10, and the reflective surface faces the first reflective layer 101, wherein a reflective hole 103 through which light can pass is formed at a central portion of each of the first reflective layer 101 and the second reflective layer 102 of the vertical reference mirror 42 and the vertical detection mirror 52, and the horizontal reference mirror 41 and the horizontal detection mirror 51 may be formed at a central portion of the corresponding first reflective layer 101 or second reflective layer 102 near a direction from which a laser beam comes, of course, the horizontal reference mirror 41 and the horizontal detection mirror 51 may have holes 103 on both the first reflective layer 101 and the second reflective layer 102. In the assembled state, the horizontal reference mirror 41 and the horizontal detection mirror 51 have the same orientation of the hole 103, and the vertical reference mirror 42 and the vertical detection mirror 52 have the same orientation of the hole 103.

The first and second

light reflecting layers

101 and 102 are metal reflecting films coated on the transparent glass plate 10, and may be, for example, mercury films. After entering between the first reflective layer 101 and the second reflective layer 102 through the hole 103, the light undergoes multiple reflections and finally exits at the sidewall of the transparent glass plate 10.

As shown in fig. 1, in order to facilitate assembly, the top of the upright 2 of the present embodiment is provided with a first support frame 21 for mounting a horizontal reference mirror 41 and a vertical reference mirror 42, the first support frame 21 includes two support rods vertically arranged on the top of the upright 2 and having equal heights, the horizontal reference mirror 41 is horizontally supported on the top of the first support frame 21, the vertical reference mirror 42 is located below the horizontal reference mirror 41 and fixed on the first support frame 21 at the edge, and a gap is provided between the upper end of the vertical reference mirror 42 and the lower wall surface of the horizontal reference mirror 41 for allowing laser rays to enter the hole 103 of the horizontal reference mirror 41. The holes of the horizontal reference mirror and the vertical reference mirror are positioned on the extension line of the central axis of the upright post. The horizontal detection mirror 51 and the vertical detection mirror 52 are mounted on the front side of the heliostat 1 through the second support frame 22, the second support frame 22 comprises a first support rod 221 and a second support rod 222, the rear edge of the horizontal detection mirror 51 is fixed on the lower end of the first support rod 221, the front edge of the vertical detection mirror 222 is fixed on the upper end of the first support rod 221, the front end of the second support rod 222 is connected with the middle part of the first support rod 221, and the rear end of the second support rod 222 penetrates through the heliostat 1 and is connected with the front side of the upright post 2. The heliostat 1 has a gap 11 through which the second support bar 222 passes and which allows the heliostat 1 to turn relative to the second support bar 222. The heliostat 1 is formed by arranging a plurality of reflectors 12, a gap 11 exists between adjacent reflectors 12, and the gap 11 meets the above requirement, so that the turnover of the heliostat 1 is not influenced by the installation structures such as the second support rod 222.

As shown in fig. 1, 2, and 5, the sunlight tracking apparatus of this embodiment further includes a standby reference mirror 43 and a standby detection mirror 53 having the same structures as the horizontal reference mirror 41, the vertical reference mirror 42, the horizontal detection mirror 51, and the vertical detection mirror 52, wherein the standby reference mirror 43 is vertically disposed above the horizontal reference mirror 41, and an included angle a of 10 to 20 degrees is formed between the standby reference mirror 43 and the vertical reference mirror 42. The holes of the standby reference mirror are positioned on the extension line of the central axis of the upright post. The standby detection mirror 53 is vertically arranged above the vertical detection mirror 52, and an included angle b of 10-20 degrees is formed between the standby detection mirror 53 and the vertical detection mirror 52. The spare reference mirror 43 and the spare detection mirror 53 are each provided with a photodetector 6 capable of detecting the position from which the reflected light is emitted. Since the sunlight changes direction at any time during the day, there may be some times when the vertical reference mirror 42 and the vertical detection mirror 52 of the heliostat 1 cannot accurately feed back the light direction, and the standby reference mirror 43 and the standby detection mirror 53 are provided to track the light when the vertical reference mirror 42 and the vertical detection mirror 52 cannot feed back the light direction, so that the use is not affected.

The photodetectors 6 are arranged along the circumferential direction of the horizontal reference mirror 41, the vertical reference mirror 42, the horizontal detection mirror 51, the vertical detection mirror 52, the auxiliary reference mirror 43, and the auxiliary detection mirror 54 to ensure that the positions of the reflected light rays at various positions can be detected and the light ray direction can be accurately tracked. The light detector 6 in this embodiment is formed by arraying photosensitive devices disposed on the periphery of each transparent glass plate 10.

The tracking method of the sunlight tracking device of the tower type solar power generation system comprises the following steps:

(1) two laser beams irradiating towards the center direction of the heat collector, wherein the first laser beam penetrates through a hole 103 in the middle of the horizontal reference mirror 41, is reflected for multiple times between a first reflecting layer 101 and a second reflecting layer 102 of the horizontal reference mirror and then is emitted from the edge of the transparent glass plate 10, the second laser beam penetrates through a hole 103 in the middle of the vertical reference mirror 42, is reflected for multiple times between the first reflecting layer 101 and the second reflecting layer 102 of the vertical reference mirror and then is emitted from the edge of the transparent glass plate 10, and the emission positions of the reflected light beams are respectively detected by a light detector 6;

the sun rays reflected by the heliostat pass through the hole 103 in the middle of the horizontal detection mirror 51, are reflected for multiple times between the first reflecting layer 101 and the second reflecting layer 102, and then are emitted from the edge of the transparent glass plate 10, the sun rays reflected by the heliostat simultaneously pass through the hole 103 in the middle of the vertical detection mirror 51, are reflected for multiple times between the first reflecting layer 101 and the second reflecting layer 102, and then are emitted from the edge of the transparent glass plate 10, and the emission positions of the reflected rays are respectively detected by the light detector 6;

(2) if the light detector 6 detects that the position of the first beam of laser emitted from the edge of the horizontal reference mirror 41 corresponds to the position of the sun light reflected by the heliostat and emitted from the edge of the horizontal detection mirror 51 in the circumferential direction, that is, the first beam of laser emitted from the edge of the horizontal reference mirror 41 and the sun light reflected by the heliostat are parallel to each other after emitted from the edge of the horizontal detection mirror 51, the axial position of the heliostat 1 relative to the upright post 2 does not need to be adjusted;

if the light detector 6 detects that the position of the second beam of laser emitted from the edge of the vertical reference mirror 42 corresponds to the position of the sun light reflected by the heliostat emitted from the edge of the vertical detection mirror 52 in the circumferential direction, that is, the position of the heliostat 1 relative to the axial direction of the beam 3 does not need to be adjusted after the second beam of laser emitted from the edge of the vertical reference mirror 42 and the position of the sun light reflected by the heliostat are parallel to each other after the sun light emitted from the edge of the vertical detection mirror 52;

(3) if the light detector 6 detects that the position of the first beam of laser emitted from the edge of the horizontal reference mirror 41 and the position of the sun light reflected by the heliostat and emitted from the edge of the horizontal detection mirror 51 are deviated in the circumferential direction, namely the first beam of laser emitted from the edge of the horizontal reference mirror 41 is not parallel to the position of the sun light reflected by the heliostat and emitted from the edge of the horizontal detection mirror 51, the upright column 2 rotates along the self axial direction and simultaneously drives the heliostat 1 to turn over until the light detector 6 detects that the position of the first beam of laser emitted from the edge of the horizontal reference mirror 41 and the position of the sun light reflected by the heliostat and emitted from the edge of the horizontal detection mirror 51 correspond in the circumferential direction;

if the light detector 6 detects that the position of the second beam of laser emitted from the edge of the vertical reference mirror 42 and the position of the solar ray reflected by the heliostat emitted from the edge of the vertical detection mirror 52 are deviated in the circumferential direction, namely the second beam of laser emitted from the edge of the vertical reference mirror 42 is not parallel to the position of the solar ray reflected by the heliostat emitted from the edge of the vertical detection mirror 52, the beam 3 rotates around the self axial direction and simultaneously drives the heliostat 1 to turn over until the light detector 6 detects that the position of the second beam of laser emitted from the edge of the vertical reference mirror 42 and the position of the solar ray reflected by the heliostat emitted from the edge of the vertical detection mirror 52 correspond to each other in the circumferential direction;

in the above adjustment process, the reference mirror assembly 4, the detection mirror assembly 5, and the photodetector 6 are kept stationary with respect to the column 2.

Claims

1. The utility model provides a tower solar electric system's sunlight tracking means, includes heliostat (1), stand (2) and crossbeam (3), heliostat (1) slope is arranged and back is installed on crossbeam (3), crossbeam (3) can be followed self axial and locate on stand (2) with rotating, on stand (2) vertical arrangement can be followed self axial and locate the holding surface with rotating, its characterized in that: also comprises

The reference mirror assembly (4) is arranged at the back of the heliostat (1), synchronously rotates along with the upright post (2), and is used for receiving the laser beam irradiated to the center direction of the heat collector and reflecting the laser beam out;

the detection mirror assembly (5) is arranged on the front side of the heliostat (1), synchronously rotates along with the upright post (2), and is used for receiving and reflecting the sunlight; and

and the light detector (6) is arranged on the reference mirror assembly (4) and the detection mirror assembly (5) and is used for detecting whether the directions of the laser rays reflected by the reference mirror assembly (4) and the solar rays reflected by the detection mirror assembly (5) are consistent or not.

2. The sunlight tracking apparatus of a tower-type solar power generation system according to claim 1, wherein: the reference mirror assembly (4) comprises a horizontal reference mirror (41) and a vertical reference mirror (42), the horizontal reference mirror (41) is horizontally arranged at the back of the heliostat (1), the vertical reference mirror (42) is vertically arranged at the back of the heliostat (1) and is arranged perpendicular to the heliostat (1); the detection mirror assembly (5) comprises a horizontal detection mirror (51) and a vertical detection mirror (52), the horizontal detection mirror (51) is horizontally arranged on the front side of the heliostat (1), and the vertical detection mirror (52) is vertically arranged on the front side of the heliostat (1) and is perpendicular to the heliostat (1).

3. The sunlight tracking apparatus of a tower-type solar power generation system according to claim 2, wherein: the horizontal reference mirror (41), the vertical reference mirror (42), the horizontal detection mirror (51) and the vertical detection mirror (52) are of the same structure and respectively comprise a transparent glass plate (10), and a first reflecting layer (101) and a second reflecting layer (102) which are parallel to each other, the transparent glass plate (10) is disc-shaped, the first reflecting layer (101) is arranged on a first wall surface of the transparent glass plate (10) and the reflecting surfaces are arranged inwards, the second reflecting layer (102) is arranged on a second wall surface of the transparent glass plate (10) and the reflecting surfaces are arranged towards the first reflecting layer (101), and holes (103) capable of allowing light rays to pass through are formed in the middle parts of the first reflecting layer (101) and/or the second reflecting layer (102);

in the assembled state, the horizontal reference mirror (41) and the horizontal detection mirror (51) have the same direction of the hole (103), and the vertical reference mirror (42) and the vertical detection mirror (52) have the same direction of the hole (103).

4. The sunlight tracking apparatus of a tower-type solar power generation system according to claim 3, wherein: the top of the upright post (2) is provided with a first support frame (21) for mounting a horizontal reference mirror (41) and a vertical reference mirror (42), the horizontal reference mirror (41) is supported on the upright post (2) through the first support frame (21) and is horizontally arranged, and the edge of the vertical reference mirror (42) is constrained on the first support frame (21) and is vertically arranged with the horizontal reference mirror (41) at intervals; the holes of the horizontal reference mirror and the vertical reference mirror are positioned on the extension line of the central axis of the upright post.

5. The sunlight tracking apparatus of a tower-type solar power generation system according to claim 3, wherein: the horizontal detection mirror (51) and the vertical detection mirror (52) are mounted on the second support frame (22), the second support frame (22) at least comprises a first support rod (221) and a second support rod (222), the horizontal detection mirror (51) and the vertical detection mirror (52) are vertically constrained on the first support rod (221) at intervals, the front end of the second support rod (222) is connected with the first support rod (221), and the rear end of the second support rod (222) penetrates through the heliostat (1) and is connected with the upright column (2).

6. The sunlight tracking apparatus of a tower-type solar power generation system according to claim 5, wherein: the heliostat (1) is provided with a gap (11) for the second support rod (222) to pass through and allowing the heliostat (1) to turn relative to the second support rod (222).

7. The sunlight tracking apparatus for a tower-type solar power generation system according to any one of claims 3 to 6, wherein: the heliostat also comprises a standby reference mirror (43) and a standby detection mirror (53), wherein the standby reference mirror (43) and the standby detection mirror (53) have the same structures as the horizontal reference mirror (41), the vertical reference mirror (42), the horizontal detection mirror (51) and the vertical detection mirror (52), the standby reference mirror (43) is vertically arranged at the back of the heliostat (1) and forms an included angle a with the vertical reference mirror (42), and a hole of the standby reference mirror is positioned on an extension line of a central axis of the upright column;

the spare detecting mirror (53) is vertically arranged on the front side of the heliostat (1) and forms an included angle b with the vertical detecting mirror (52), and the spare reference mirror (43) and the spare detecting mirror (53) are both provided with a light detector (6) capable of detecting the emitting position of the reflected light.

8. The sunlight tracking apparatus of a tower-type solar power generation system according to claim 7, wherein: the included angles formed between the standby reference mirror (43) and the vertical reference mirror (42) and between the standby detection mirror (53) and the vertical detection mirror (52) are the same and are 10-20 degrees.

9. The sunlight tracking apparatus of a tower-type solar power generation system according to claim 7, wherein: the light detector (6) is arranged along the circumferential direction of the horizontal reference mirror (41), the vertical reference mirror (42), the horizontal detection mirror (51), the vertical detection mirror (52), the standby reference mirror (43) and the standby detection mirror (53).