CN206790426U - A kind of heliostat - Google Patents

Abstract

A heliostat is composed of a reflector (1), a reflector support (5), a column (2) and a transmission device (3), and the reflector (1) is formed by splicing a plurality of reflector units (11). The outline shape of the reflecting mirror (1) is circular or nearly circular. The reflector unit (11) is connected to the reflector bracket (5) to form an assembly, which can be rotated at least 180 degrees around the elevation angle rotation axis (55), so that the reflector (1) can be in an upside-down posture to reduce dust reflection accumulation on the surface.

Description

a heliostat

technical field

The utility model relates to a heliostat device for a tower type solar thermal power station.

Background technique

The heliostat is a concentrator device used in a tower solar thermal power station, which reflects sunlight and focuses it into a heat absorbing device fixed at a certain height on the tower. Heliostats generally consist of reflectors, support structures, transmissions and control systems. The cost of heliostats accounts for more than 40% of the total cost of tower-type solar thermal power generation systems. Therefore, in order to reduce system power generation costs and promote the commercialization of tower-type solar power generation systems, it is necessary to improve the field concentration efficiency of heliostats and reduce the Sunglass material cost, processing cost, transportation cost, assembly and debugging cost, and maintenance cost, etc. In order to achieve the purpose of reducing costs, domestic and foreign heliostats have carried out intensive research mainly on the material cost and processing cost of the supporting structure and achieved certain results, but the maintenance cost and improving the concentrating efficiency of the mirror field still need to be studied. At present, the widely used heliostats are T-type heliostats. When the heliostats do not need to work or are often in a protective posture in a windy environment, that is, the reflective surface of the heliostat is horizontal, so that dust is easy to accumulate on the surface of the reflector. , so that the reflectivity is greatly reduced and the light-gathering efficiency is affected, or the cleaning frequency of the reflector needs to be increased, thereby increasing the maintenance cost of the heliostat. In addition, the surface of the reflector is rectangular. When the mirror field is arranged, the adjacent front and rear heliostats are likely to block light and shadow at the four corners of the rectangle, thereby reducing the light-gathering efficiency of the mirror field.

Utility model content

The purpose of this utility model is to overcome the defects of the above-mentioned prior art, and provide a heliostat device supported by a single column that can be reversed in a nearly circular shape, thereby reducing the maintenance cost of the heliostat and improving the field light-gathering efficiency of the heliostat .

In order to achieve the above object, the utility model takes the following technical solutions:

The heliostat of the utility model is composed of a reflector, a reflector bracket, a column and a transmission device. The reflector unit is fixed on the reflector bracket, the transmission device is installed on the column, and both sides of the transmission device are fixedly connected with the beam of the reflector support.

The overall surface shape of the reflector is formed by splicing a plurality of reflector units, the overall outline shape of the reflector is circular or nearly circular, and the surface shape of the reflector units can be curved or flat. The bottom end surface of the transmission device is installed on the top of the column, and the end surfaces on both sides of the transmission device are connected with the middle part of the beam of the mirror support. Under the driving force of the transmission device, the reflector support and all the reflector units can rotate at least 180 degrees around the elevation angle output axis of the transmission device. The mirror bracket and the mirror are symmetrically arranged with respect to the column, and the mirror is provided with an opening at a position corresponding to the column, so that the mirror and the mirror bracket can be rotated to an upside-down posture, that is, one side of the reflective surface of the mirror faces ground.

The utility model has the following characteristics: First, the overall surface shape of the heliostat reflector adopts a circular or nearly circular arrangement, which can effectively solve the problem of light blocking or shadowing in the mirror field and improve the efficiency of the mirror field. Second, when the heliostat is not working, the reflector is parked in an inverted posture, which reduces the accumulation of dust on the reflective surface and reduces the cleaning frequency, thereby reducing the maintenance cost of the heliostat.

Description of drawings

Figure 1 is the front view of the structural diagram of the heliostat, in which: 1 reflector, 2 column, 3 transmission, 11 reflector unit, 55 degrees of rotation axis;

Figure 2 is a schematic diagram of the back structure of the heliostat. In the figure: 2 columns, 3 transmission devices, 5 reflector brackets, 11 reflector units, 51 beams, 55 altitude rotation axes, and 33 azimuth rotation axes;

Fig. 3 is a schematic diagram of the overall structure of the mirror bracket, in which: 51 beam, 52 bracket module, 53 horizontal axis rotation adjustment mechanism, 54 vertical axis rotation adjustment mechanism.

detailed description

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Embodiment one

The embodiment of the utility model is a nearly circular heliostat supported by a single column.

The overall structure of the utility model is shown in Figure 1 and Figure 2. Fig. 1 is a front view of the structural schematic diagram of the heliostat, and Fig. 2 is a rear view of the structure. The heliostat structure includes a mirror 1 , a column 2 , a transmission device 3 and a mirror bracket 5 . The reflector 1 is formed by splicing several reflector units 11 in a linear array or a circular array, and the shape of the assembled reflector 1 is circular or nearly circular, that is, no reflector units are arranged at the four corners of the reflector 1 . When several rows of such heliostats form a heliostat field, the solar shading and shadow phenomenon can be reduced between the adjacent front and back rows of heliostats, so that the row spacing of heliostats can be reduced, and the light concentration of the mirror field can be improved. efficiency and reduce the mirror field footprint. The surface type of the mirror unit 11 may be a plane or a curved surface. The reflector unit 11 is fixed on the reflector support 5 , and the reflector support 5 is connected to the transmission device 3 through both ends of the middle part of the beam 51 . The output shaft of the transmission device 3 coincides with the center of rotation of the crossbeam 51 to form an elevation angle rotation axis 55 . All the reflector units 11 and the reflector bracket 5 form a whole, and under the action of the driving force of the transmission device 3, they can rotate around the rotation axis 55 in elevation angle, so as to realize the tracking of the sun in the elevation angle direction. The height angle of the heliostat of the utility model is greater than 180 degrees, so that the reflective surface of the reflector 1 faces the ground, that is, an upside-down attitude, and effectively prevents dust from accumulating on the reflective surface. The lower end surface of the transmission device 3 is fixed on the top of the column 2 , and the azimuth rotation axis 33 of the transmission device 3 coincides with the axis of the column 2 and is orthogonal to the elevation rotation axis 55 . The reflector 1, the reflector bracket 5 and the transmission device 3 are taken as a whole, and under the action of the driving force of the transmission device 3, they rotate around the azimuth rotation axis 33 to realize tracking of the sun in the azimuth direction.

FIG. 3 is a schematic structural view of the mirror bracket 5, which is composed of a beam 51, a number of bracket modules 52, a number of horizontal axis rotation adjustment mechanisms 53 and a number of vertical axis rotation adjustment mechanisms 54. The bracket module 52 is connected to the beam 51 through a vertical axis rotation adjustment mechanism 54, and can rotate around the vertical axis at a certain angle. The horizontal axis rotation adjustment mechanism 53 is connected with the bracket module 52 and can rotate around the horizontal axis. The angle rotation adjustment mechanisms 53 and 54 in these two directions can complete the light spot adjustment of the mirror unit 11 quickly and accurately.

Claims (2)

1. a kind of heliostat, including speculum (1), mirror support (5), column (2) and transmission device (3)；Mirror unit It is fixed on mirror support, transmission device is arranged on column, and the both sides of transmission device and the crossbeam of mirror support are connected, It is characterized in that：Described speculum (1) is spliced by multiple mirror units (11), speculum (1) overall profile shape For circular or subcircular, the face type of mirror unit (11) is curved surface or plane；Multiple described mirror unit (11) connections On mirror support (5)；Transmission device (3) bottom end face is arranged on the top of column (2), transmission device (3) both sides end face It is connected with the middle part of the crossbeam (51) of mirror support (5)；Under the driving force effect of transmission device (3), mirror support (5) and Elevation angle rotation axis (55) rotation at least 180 degree of the mirror unit (11) around transmission device (3)；Mirror support (5) And speculum (1) is arranged symmetrically relative to column (2), and speculum (1) is provided with opening position corresponding with column (2) and opened Mouthful, speculum (1) and mirror support (5) is rotated to the reflecting surface side direction ground of back-off posture, i.e. speculum (1) Face.

2. according to the heliostat described in claim 1, it is characterised in that：Described mirror support (5) is by crossbeam (51), some Rack module (52), some horizontal axis directions rotation regulating mechanism (53) and some vertical axis directions rotation regulating mechanism (54) form；Rack module (52) is connected by vertical axis direction rotation regulating mechanism (54) with crossbeam (51), can be around perpendicular Straight axis turns an angle；Horizontal axis direction rotation regulating mechanism (53) is connected with rack module (52), can be around level Axis rotates.