CN105353498A - Anti-hail heliostat - Google Patents

Abstract

A hailproof type heliostat, a biaxial tracking transmission box (2) is installed on the upper part of the heliostat column (1), and a heliostat main beam ( 3), an inner plane truss (4) and an outer plane truss (5) are installed on each side of the heliostat main beam (3), and an inner plane truss (4) and an outer plane truss (5) are installed with Two outer beams (6) and one inner beam (7) perpendicular to the inner plane truss (4) and outer plane truss (4), on which units are mounted mirror (8), the glass reflector (9) of the unit mirror (8) constitutes the reflective surface of the heliostat, and the anti-hail net (11) is installed on the heliostat structure at the back (100) of the glass reflector (9) . During non-working hours of the heliostat, the reflective surface of the heliostat is reversed, and the anti-hail net (11) is located on the upper part of the glass reflector (9). When there is hail falling, the anti-hail net (11) can block the damage to the glass reflector hail.

Description

A Hailproof Heliostat

technical field

The invention relates to a heliostat for solar energy utilization.

Background technique

The heliostat is the concentrating device of the tower solar thermal system. The reflective surface of the heliostat tracks the sun, reflects and gathers the sunlight to a fixed target. At present, the reflective surface of heliostats generally adopts silver-coated glass reflectors, which have the advantages of high reflectivity and long service life. The reflective surface of the heliostat is generally assembled from glass reflectors in a plurality of unit mirrors. The glass reflector in the unit mirror is formed by cold drawing the flat glass reflector into the required micro-arc surface, and is formed by the unit mirror bracket maintain its micro-arc shape. However, the glass reflector of the heliostat unit mirror is a brittle material, which is easily damaged under the impact of large hail, so that the heliostat cannot work.

In order to improve the anti-hail performance of some heliostats, of course, mainly to improve the anti-hail performance of the glass reflector, a layer of tempered glass is arranged on the back of the silver-plated glass reflector, and a clip is provided between the silver-plated mirror and the tempered glass. glue layer. Although the toughened glass and the interlayer increase the strength of the reflector for the heliostat, the disadvantage is that the cost of the reflector is greatly increased, and the cost of the heliostat is also significantly increased.

Contents of the invention

The object of the present invention is to overcome the disadvantages of the prior art and provide a relatively low-cost hailproof heliostat.

The technical scheme that the present invention solves technical problem adopts is:

A dual-axis tracking transmission box composed of a pitch rotation mechanism and a horizontal rotation mechanism is installed on the upper part of the heliostat column, and the heliostat main beam is respectively installed on both sides of the pitch rotation mechanism of the dual-axis tracking transmission box. An inner plane truss and an outer plane truss are installed on the side heliostat main beam, the inner plane truss and the outer plane truss are parallel to each other and perpendicular to the heliostat main beam; the inner plane truss on each side of the heliostat main beam Two outer beams and one inner beam are installed on the outer plane truss, and the outer beam and inner beam are perpendicular to the inner plane truss and the outer plane truss; the outer beam is connected to the inner plane truss and the outer plane truss, and the inner beam is also connected to the The inner plane truss and the outer plane truss are connected; the two outer beams and the inner beams are arranged equidistantly along the length of the inner plane truss and the outer plane truss, the inner beam is located in the middle, and the two outer beams are respectively located on both sides. The above constitute the main support structure of the heliostat. Multiple unit mirrors are installed on two outer beams and one inner beam; the glass reflectors of all unit mirrors form the reflective surface of the heliostat. The reflective surface of the heliostat is an open or semi-open structure. During non-working hours, the main girder of the heliostat can rotate around the horizontal axis of the pitching and rotating mechanism, so that the reflective surface of the heliostat is reversed. On the heliostat structure on the back of the glass reflector, a hail-proof net is installed parallel to the reflective surface of the heliostat. There is a gap between the anti-hail net and the glass reflector to prevent the elastic deformation of the anti-hail net from impacting the glass reflector when it is impacted by hail. When the heliostat is not working, the reflective surface of the heliostat is turned upside down. At this time, the anti-hail net is located on the upper part of the glass reflector. When there is hail falling, the anti-hail net can block the hail that damages the glass reflector.

There are two specific solutions:

1. The anti-hail net is installed on the unit mirror bracket:

The back side of the glass reflector of the unit mirror is bonded with a glass reflector support; the glass reflector is located on the top of the unit mirror support, the reflective surface of the glass reflector is upward, and the back of the glass reflector is supported by the glass reflector The parts are connected with the unit mirror bracket; the anti-hail net can be fixed on the lower part of the unit mirror bracket parallel to the glass reflector.

2. The anti-hail net is installed on the main support structure of the heliostat column:

The anti-hail net is fixed on the two outer beams and one inner beam of the heliostat main support structure on the back of the heliostat reflector.

The anti-hail net is composed of wire mesh and metal frame, and the wire mesh is connected with the metal frame by welding.

The mesh size of the wire mesh shall be determined according to the following principles: hail that may cause damage to the glass reflector shall not pass through the anti-hail mesh.

The present invention only adds a layer of anti-hail net to the heliostat structure on the back of the glass reflector in the unit mirror of the heliostat. The cost of the anti-hail net is relatively low, and adding the anti-hail net will not significantly increase the cost of the heliostat.

Description of drawings

Fig. 1 is the schematic diagram when the heliostat of the embodiment of the present invention works;

Fig. 2 is a schematic diagram of when the reflective surface of the heliostat in the embodiment of the present invention is turned upside down in the non-working state;

Fig. 3 is the structure schematic diagram of the anti-hail net of the embodiment of the present invention;

4 is a schematic diagram of the connection between the glass reflector of the unit mirror and the glass reflector support in the embodiment of the present invention;

5 is a schematic diagram of the relative positions of the glass reflector and the unit mirror bracket of the unit mirror according to the embodiment of the present invention;

6 is a schematic diagram of the connection of the glass reflector of the unit mirror to the unit mirror support through the glass reflector support in the embodiment of the present invention;

Fig. 7 is a schematic diagram of a heliostat according to an embodiment of the present invention, with its anti-hail net installed on the bracket of the unit mirror;

Fig. 8 is a schematic diagram of a heliostat according to an embodiment of the present invention, and its anti-hail net installed on the inner beam and the outer beam;

Fig. 9 is a view in direction B of Fig. 8, which is a schematic diagram of fixing the anti-hail net on the inner beam and the outer beam;

Fig. 10 is a view from A-A direction of Fig. 8, which is a schematic diagram of fixing the hailproof net on the inner beam and the outer beam;

Fig. 11 is a schematic diagram of a hailproof type heliostat with a semi-open reflecting surface.

detailed description

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

As shown in Figures 1 and 2, a dual-axis tracking transmission box 2 composed of a pitch rotation mechanism and a horizontal rotation mechanism is installed on the top of the heliostat column 1 . Heliostat main beams 3 are respectively installed on both sides of the pitch rotation mechanism of the biaxial tracking transmission 2 . An inner plane truss 4 and an outer plane truss 5 are installed on each side of the heliostat main beam 3 , the inner plane truss 4 and the outer plane truss 5 are parallel to each other and perpendicular to the heliostat main beam 3 . Two outer beams 6 and one inner beam 7 are installed on the inner plane truss 4 and the outer plane truss 5 on the heliostat main beam 3 on each side, and the outer beam 6 and the inner beam 7 are connected with the inner plane truss 4 and the outer plane truss 5 is vertical, the outer beam 6 is connected with the inner plane truss 4 and the outer plane truss 5 at the same time, and the inner beam 7 is also connected with the inner plane truss 4 and the outer plane truss 5 at the same time; the two outer beams 6 and the inner beam 7 are connected along the inner plane truss 4 and the length of the outer plane truss 5 are arranged equidistantly, the inner beam 7 is located in the middle, and the outer beam 6 is located on both sides. The above components constitute the main support structure of the heliostat. Four unit mirrors 8 are installed on two outer beams 6 and one inner beam 7 on a heliostat main beam 3; the glass mirrors 9 of the eight unit mirrors 8 form the reflecting surface of the heliostat, and the heliostat The surface is an open structure. During non-working hours, the main beam 3 of the heliostat can rotate around the horizontal axis 10 of the pitching and rotating mechanism to reverse the reflective surface of the heliostat.

As shown in FIG. 3 , the anti-hail net 11 is composed of a metal frame 13 and a wire mesh 12 , the metal frame 13 surrounds the wire mesh 12 , and the wire mesh 12 is connected to the metal frame 13 by welding. The size of the mesh of the wire mesh 12 should ensure that the hail that damages the glass reflector 9 cannot pass through.

There are two options for installing the anti-hail net on the heliostat.

Option 1: The anti-hail net is installed on the unit mirror bracket.

As shown in FIG. 4 , the back surface 100 of the glass reflector 9 is bonded with a glass reflector support 14 ; as shown in FIG. 5 , the glass reflector 9 is located on the upper part of the unit mirror support 15 , and the reflective surface 200 of the glass reflector faces upward. As shown in FIG. 6 , the glass reflector back 100 is connected to the unit mirror support 15 through the glass reflector support 14 , and the glass reflector 9 is parallel to the lower surface 300 of the unit mirror support 15 . As shown in FIG. 7 , the anti-hail net 11 is parallel to the glass mirror 9 and fixed on the lower surface 400 of the unit mirror bracket. As shown in FIG. 2 , when the unit mirror 8 is installed on the heliostat, the anti-hail net 11 is located on the upper part of the glass mirror 9 because the reflective surface of the heliostat is reversed during non-working hours of the heliostat. When there is hail falling, the anti-hail net 11 can block the hail that damages the glass reflector 9 . The distance between the anti-hail net 11 and the glass reflector 9 can be determined by the gap h between the glass reflector 9 and the upper surface 300 of the unit mirror support and the height H of the unit mirror support 15, so as to ensure that the anti-hail net 11 is elastically impacted by hail The glass reflector 9 will not be impacted during deformation.

Option 2: The anti-hail net is installed on the main support structure of the heliostat.

As shown in Fig. 8, Fig. 9 and Fig. 10, the anti-hail nets 16, 17 are fixed on the two outer beams 6 and one inner beam 7 on the back of the glass reflector 9 of the unit mirror 8 through the anti-hail net supports 18. During non-working hours of the heliostat, the anti-hail nets 16 and 17 are located on the upper part of the glass reflector 9 because the reflective surface of the heliostat is inverted. When there is hail falling, the anti-hail nets 16, 17 can block the hail that damages the glass reflector 9. As shown in Figure 8, the distance between the hailproof net 16,17 and the glass reflector 9 can be determined by the gap h between the glass reflector 9 and the unit mirror support upper surface 300, the height H of the unit mirror support 15, the height of the outer beam 6 The height d and the height D of the anti-hail net support member 18 are determined to ensure that the anti-hail nets 16 and 17 will not impact the glass mirror 9 when they are elastically deformed by the impact of hail, and the height of the inner beam 7 and the outer beam 6 is equal.

The technical solution of the invention is also applicable to the heliostat whose reflective surface is half-open.

As shown in FIG. 11 , the reflective surface 20 of the heliostat is a semi-open structure, and the semi-open reflective surface 20 can be rotated in the direction of the arrow 19 to be reversed. Install the anti-hail net on the heliostat structure on the back of the reflective surface 20. When the reflective surface 20 is turned upside down, the anti-hail net is located on the upper part of the reflective surface 20, and the anti-hail net can block the reflective surface 20 from hail that causes damage to the reflective surface 20. .

Claims (5)

1. A hailproof type heliostat, on the upper part of the heliostat column (1) is installed a two-axis tracking transmission box (2) composed of a pitch rotation mechanism and a horizontal rotation mechanism, and on the two-axis tracking transmission box (2 ) are respectively installed on both sides of the heliostat main beam (3), and an inner plane truss (4) and an outer plane truss (5) are installed on each side of the heliostat main beam (3), and the inner plane truss ( 4) parallel to the outer plane trusses (5) and perpendicular to the heliostat main beam (3); on the inner plane trusses (4) and outer plane trusses (5) on each side of the heliostat main beam (3) Two outer beams and one inner beam are installed, and both the outer beam and the inner beam are connected with the inner plane truss (4) and the outer plane truss (5) at the same time, and are perpendicular to the inner plane truss (4) and the outer plane truss (5) ; The two outer beams and the inner beams are equidistantly arranged along the length of the inner plane truss and the outer plane truss, the inner beam is located in the middle, and the two outer beams are respectively located on both sides; two heliostat main beams (3) on each side A plurality of unit mirrors (8) are installed on an outer beam and an inner beam; the glass reflectors (9) of all unit mirrors (8) constitute the reflective surface of the heliostat; the reflective surface of the heliostat is open or semi-open Structure; the main beam of the heliostat (3) can rotate around the horizontal axis (10) of the pitching and rotating mechanism during non-working hours, so that the reflecting surface of the heliostat is reversed, and it is characterized in that: the heliostat on the back of the reflecting surface of the heliostat On the mirror structure, a hailproof net (11) is installed parallel to the reflecting surface of the heliostat, and there is a gap between the hailproof net (11) and the glass reflector (9); during the non-working hours of the heliostat, the heliostat The reflective surface is reversed, and at this moment, the anti-hail net (11) was positioned at the top of the glass reflector (9), and when hail was landed, the anti-hail net (11) blocked the hail that damaged the glass reflector (9). 2. The anti-hail type heliostat as claimed in claim 1, characterized in that: the anti-hail net (11) consists of a wire mesh (12) and a metal frame surrounding the wire mesh (12) ( 13) Composition. 3. The anti-hail heliostat according to claim 1 or 2, characterized in that: the mesh size of the wire mesh (12) should ensure that the hail that damages the glass reflector (9) cannot pass through. 4. The anti-hail type heliostat according to claim 1, characterized in that: a glass reflector support (14) is bonded to the back (100) of the glass reflector (9); Reflector (9) is positioned at the top of unit mirror support (15), and glass reflector (9) reflective surface (200) is upward, and the back side (100) of glass reflector (9) passes glass reflector support (14) and The unit mirror support (15) is connected, and the anti-hail net (11) is fixed on the lower surface (400) of the unit mirror support parallel to the glass reflector (9). 5. The anti-hail type heliostat according to claim 1, characterized in that: the anti-hail net is fixed on the back side (100) of the glass reflector (9) by a support member (18) for the anti-hail net ) on two outer beams (6) and one inner beam (7).