阅读说明：本技术 焦点固定型二次反射碟式太阳能集热器 (Fixed focus type secondary reflection dish solar heat collector ) 是由 许诚 李少奎 许宏宇 刘文毅 杨勇平 于 2020-02-24 设计创作，主要内容包括：本发明公开了属于太阳能热利用领域的焦点固定型二次反射碟式太阳能集热器。该集热器主要由回转台部件、抛物碟滑轨部件、光学镜面部件及辅助设备构成。该集热器的回转基台导轨水平固定于地面,回转基台安装在回转基台导轨上,集热器固定在支撑平台上,回转基台沿回转基台导轨水平转动以带动集热器及光学镜面部件追踪太阳方位角,再由抛物碟滑轨部件带动抛物碟绕集热器支架横梁水平中轴线转动追踪太阳高度角,旋转双曲面二次反射镜上焦点与下焦点连线垂直地面,上焦点与抛物碟聚集太阳光的焦点重合,最终实现焦点固定的二次反射式光路效果。该集热器结构简单、聚光比高、光斑固定且光线垂直向下等特点,可为多种高温太阳能热化学反应器提供光源。(The invention discloses a focal point fixed secondary reflection disc type solar heat collector, belonging to the field of solar heat utilization. The heat collector mainly comprises a rotary table part, a parabolic dish slide rail part, an optical mirror part and auxiliary equipment. A rotary base table guide rail of the heat collector is horizontally fixed on the ground, the rotary base table is installed on the rotary base table guide rail, the heat collector is fixed on a supporting platform, the rotary base table horizontally rotates along the rotary base table guide rail to drive the heat collector and an optical mirror surface component to track a solar azimuth angle, then a parabolic dish is driven by a parabolic dish sliding rail component to rotate around a horizontal central axis of a cross beam of a heat collector support to track a solar altitude angle, an upper focal point and a lower focal point of a rotating hyperboloid secondary reflector are connected to be vertical to the ground, the upper focal point is coincident with a focal point of sunlight collected by the parabolic dish, and finally. The heat collector has the characteristics of simple structure, high light condensation ratio, fixed light spots, vertical downward light and the like, and can provide light sources for various high-temperature solar thermochemical reactors.)

1. A focus fixed type secondary reflection disc type solar heat collector mainly comprises a rotary table part, a parabolic disc slide rail part, an optical mirror part and auxiliary equipment; the heat absorber is characterized in that a guide rail (1) of a rotary base platform is horizontally fixed on the ground, the rotary base platform (2) is arranged on the guide rail (1) of the rotary base platform, a supporting platform (3) is fixed on the ground, and a heat absorber (4) is placed on the supporting platform (3); the I # parabolic dish supporting rail (5), the II # parabolic dish supporting rail (6), the I # heat collector support (7) and the II # heat collector support (8) are fixed on the rotary base platform (2) in parallel in the vertical direction, and the I # heat collector support (7) and the II # heat collector support (8) are respectively arranged on the outer sides of the I # parabolic dish supporting rail (5) and the II # parabolic dish supporting rail (6); a heat collector support cross beam (9) is fixed at the upper ends of a No. I heat collector support (7) and a No. II heat collector support (8); the rotating hyperboloid secondary reflector (10) is fixed on a heat collector support beam (9); the I # parabolic dish sliding rail (11) and the II # parabolic dish sliding rail (17) are respectively placed on the I # parabolic dish supporting rail (5) and the II # parabolic dish supporting rail (6) and driven by the motor (19) to slide along the parabolic dish supporting rail, and the rotary parabolic dish (12) is fixed on the I # parabolic dish sliding rail (11) and the II # parabolic dish sliding rail (17) and moves along with the I # parabolic dish sliding rail (11) and the II # parabolic dish sliding rail (17); the I # bearing rod (13) is hinged to the rear end of the I # parabolic dish sliding rail (11) and the heat collector support cross beam (9), the II # bearing rod (14) is hinged to the rear end of the II # parabolic dish sliding rail (17) and the heat collector support cross beam (9), the III # bearing rod (15) is hinged to the front end of the I # parabolic dish sliding rail (11) and the heat collector support cross beam (9), and the IV # bearing rod (16) is hinged to the front end of the II # parabolic dish sliding rail (17) and the heat collector support cross beam (9); a gear of the rotary motor (18) is meshed with a rack of the rotary base platform (2), and a gear of the motor (19) is meshed with a rack of the I # parabolic dish slide rail (11).

2. The fixed-focus secondary reflection dish solar collector according to claim 1, wherein the rotary base guide rail (1) is a circular rail, and the rotary base (2) is driven by a rotary motor (18) rotating according to the solar azimuth angle to horizontally rotate along the rotary base guide rail (1) so as to drive the collector and an optical mirror component comprising a rotary parabolic dish (12) and a rotary hyperboloid secondary reflector (10) to track the solar azimuth angle.

3. The fixed-focus secondary reflection dish type solar collector according to claim 1, wherein a bearing rod I (13), a bearing rod II (14), a bearing rod III (15) and a bearing rod IV (16) hinged to a cross beam (9) of the collector support can rotate around a horizontal central axis of the cross beam (9) of the collector support, and a motor (19) drives a parabolic dish sliding rail I (11) and a parabolic dish sliding rail II (17) to slide along a parabolic dish supporting rail I (5) and a parabolic dish supporting rail II (6).

4. The fixed-focus secondary reflection dish type solar collector according to claim 1, wherein the I # parabolic dish support rail (5) and the II # parabolic dish support rail (6) are circular arc rails with the circle centers located on the horizontal central axis of the collector support beam (9), the radii are equal, the arc lengths are the same, and the circular arc rails are vertically fixed on the rotary base (2), and the I # parabolic dish slide rail (11) and the II # parabolic dish slide rail (17) are respectively placed on the I # parabolic dish support rail (5) and the II # parabolic dish support rail (6) and driven by the motor (19) to slide along the support rails.

5. The focal point fixed secondary reflection dish type solar collector according to claim 1, wherein the rotating hyperboloid secondary reflector (10) is fixed on the collector support beam (9), the upper focal point of the rotating hyperboloid secondary reflector (10) coincides with the focal point of the rotating parabolic dish (12), the connecting line of the upper focal point and the lower focal point of the rotating hyperboloid secondary reflector (10) is perpendicular to the ground, the lower focal point is fixed on the light-absorbing unit light-hole entrance plane, the rotating hyperboloid secondary reflector (10) is taken from a part of a complete rotating hyperboloid, and the specific shape of the rotating hyperboloid secondary reflector is a part irradiated by simulating the whole rotating hyperboloid scanned by light rays in the process of the collector from the lowest solar altitude angle to the highest solar altitude angle.

6. The fixed-focus secondary reflecting dish solar collector according to claim 1, wherein the rotating parabolic dish (12) is a part of a complete paraboloid of revolution, and is specifically shaped by firstly cutting off a shadow part caused by the rotating hyperboloid secondary reflecting mirror (10) by taking the rotating center of the rotating paraboloid as a circle center and then removing a part of the rotating paraboloid which collides with the supporting platform (3) in the operation process of the collector; the rotary parabolic dish (12) rotates around the horizontal central axis of a cross beam (9) of the heat collector support to track the solar altitude angle together with an I # parabolic dish sliding rail (11) and an II # parabolic dish sliding rail (17) driven by a motor (19) rotating according to the solar altitude angle, so that the focal spot of the rotary parabolic dish (12) is fixed in the operation process of the heat collector, and the method is the basis for realizing the secondary reflection type light path effect with a fixed focus.

7. The fixed-focus secondary reflection dish solar collector according to claim 1, wherein the support platform is fixed on the ground to keep the collector stationary with respect to the ground during operation, and the height of the support platform is adjusted to make the entrance plane of the optical aperture of the heat absorber always located at the lower focus of the hyperboloid secondary reflector.

8. The heat collecting method of the fixed-focus secondary reflection dish type solar heat collector in claim 1 is characterized in that a rotary base (2) installed on a guide rail (1) of the rotary base is driven by a rotary motor (18) rotating according to the solar azimuth angle, the rotary base (2) horizontally rotates along the guide rail (1) of the rotary base to drive an optical mirror part comprising a rotary hyperboloid secondary reflector (10) and a rotary parabolic dish (12) fixed on the rotary base (2) to track the solar azimuth angle, wherein the heat collector (4) is fixed on the ground due to the support platform (3) when in operation, and therefore, the heat collector is kept fixed relative to the ground; an electric motor (19) rotating according to the solar altitude angle drives an I # parabolic dish sliding rail (11), an II # parabolic dish sliding rail (17) slides along an I # parabolic dish supporting rail (5) and an II # parabolic dish supporting rail (6) to drive a rotary parabolic dish (12) to track the solar altitude angle, and a bearing rod is used for keeping the I # parabolic dish sliding rail (11), the II # parabolic dish sliding rail (17) not to deviate from a track in the sliding process of the I # parabolic dish supporting rail (5) and the II # parabolic dish supporting rail (6), so that the focus of the rotary parabolic dish (12) is fixed on the horizontal central axis of a heat collector supporting beam (9) in the moving process of the rotary parabolic dish (12) along the parabolic dish sliding rail; the rotary parabolic dish (12) is fixed on an I # parabolic dish sliding rail (11) and an II # parabolic dish sliding rail (17) and rotates around a horizontal central axis of a heat collector support beam (9) along with the I # parabolic dish sliding rail (11) and the II # parabolic dish sliding rail (17) to track the solar altitude angle, a focal point is fixed on the horizontal central axis of the heat collector support beam (9) in the movement process of the rotary parabolic dish (12), a rotary hyperboloid secondary reflector (10) is fixed on the heat collector support beam (9), an upper focal point of the rotary hyperboloid secondary reflector (10) is superposed with the focal point of the rotary parabolic dish (12), a connecting line of the upper focal point and a lower focal point of the rotary hyperboloid secondary reflector (10) is vertical to the ground, and the lower focal point is fixed on a light hole inlet plane of a heat absorption unit, and due to the optical characteristics of the rotary hyperboloid reflector, light rays emitted to the upper focal point of the rotary hyperboloid reflector are reflected to the lower focal point of, in the heat collector, sunlight collected by the rotary parabolic dish (12) is emitted to the upper focal point of the rotary hyperboloid secondary reflector (10) and then is reflected to the lower focal point of the rotary hyperboloid secondary reflector (10), so that the secondary reflection type light path effect with a fixed focal point is realized.

Technical Field

The invention belongs to the field of solar heat utilization, and particularly relates to a focal point fixed secondary reflection disc type solar heat collector.

Background

With the rapid increase of global energy demand, environmental problems such as greenhouse effect and air pollution and energy safety problems caused by the massive use of traditional fossil energy are increasingly prominent, clean energy needs to be developed to partially or completely replace the existing fossil energy, and solar energy is favored as renewable energy with abundant reserves due to the advantages of cleanness, inexhaustibility and the like.

In the process of solar photo-thermal utilization, the solar thermal collector is used as a core component of a photo-thermal conversion system and occupies an important position in the solar thermal utilization system, and the quality of the heat collecting effect directly influences the efficiency and the economy of the solar thermal utilization system. The existing heat collectors are roughly divided into a groove type heat collector, a tower type heat collector, a disc type heat collector and a linear Fresnel type heat collector, wherein the tower type heat collector and the disc type heat collector with higher light condensation ratio have the following problems: the tower type heat collector needs to place heavy heat absorption equipment on a relatively high heat collection tower, which is not beneficial to equipment operation and maintenance; the light spot of the dish-type heat collector can change position along with the movement of the sun, which is not beneficial to placing a large-scale heat absorption device at the focal spot. It is highly desirable to develop a new collector that can be placed near the ground without having to move the location.

Disclosure of Invention

The invention aims to provide a focus fixed type secondary reflection disc type solar heat collector which mainly comprises a rotary table part, a parabolic disc sliding rail part, an optical mirror part and auxiliary equipment; the heat absorber is characterized in that a guide rail of a rotary base platform is horizontally fixed on the ground, the rotary base platform is arranged on the guide rail of the rotary base platform, a supporting platform is fixed on the ground, and the heat absorber is placed on the supporting platform; the I # parabolic dish supporting rail, the II # parabolic dish supporting rail, the I # heat collector support and the II # heat collector support are fixed on the rotary base platform in parallel in the vertical direction, and the I # heat collector support and the II # heat collector support are respectively arranged on the outer sides of the I # parabolic dish supporting rail and the II # parabolic dish supporting rail; the cross beam of the heat collector support is fixed at the upper ends of the I # heat collector support and the II # heat collector support; the rotating hyperboloid secondary reflector is fixed on a cross beam of the heat collector bracket; the I # parabolic dish sliding rail and the II # parabolic dish sliding rail are respectively arranged on the I # parabolic dish supporting rail and the II # parabolic dish supporting rail and driven by the motor to slide along the parabolic dish supporting rail, and the rotary parabolic dishes are fixed on the I # parabolic dish sliding rail and the II # parabolic dish sliding rail and move along with the I # parabolic dish sliding rail and the II # parabolic dish sliding rail; the I # bearing rod is hinged to the rear end of the I # parabolic dish sliding rail and the heat collector support beam, the II # bearing rod is hinged to the rear end of the II # parabolic dish sliding rail and the heat collector support beam, the III # bearing rod is hinged to the front end of the I # parabolic dish sliding rail and the heat collector support beam, and the IV # bearing rod is hinged to the front end of the II # parabolic dish sliding rail and the heat collector support beam. The gear of the rotary motor is meshed with the rack of the rotary base platform, and the gear of the motor is meshed with the rack of the I # parabolic dish slide rail.

The heat collection method of the fixed-focus secondary reflection disc type solar heat collector is characterized in that in a revolving platform part, a revolving base table guide rail is horizontally fixed on the ground, the revolving base table is arranged on the revolving base table guide rail, the revolving base table is driven by a revolving motor rotating according to the solar azimuth angle to horizontally rotate along the revolving base table guide rail so as to drive an optical mirror part of the heat collector to track the solar azimuth angle, a supporting platform is fixed on the ground, and the heat collector is kept to be fixed relative to the ground when in operation;

in the parabolic dish slide rail component, an I # parabolic dish slide rail and an II # parabolic dish slide rail are supported by an I # parabolic dish support rail and an II # parabolic dish support rail and driven by a motor rotating according to the solar altitude angle to slide along the I # parabolic dish support rail and the II # parabolic dish support rail so as to drive a rotating parabolic dish to track the solar altitude angle, and a bearing rod is used for keeping the I # parabolic dish slide rail and the II # parabolic dish slide rail not to deviate from the rails in the sliding process along the I # parabolic dish support rail and the II # parabolic dish support rail so as to ensure that the focus of the rotating parabolic dish is fixed on the horizontal central axis of a heat collector support beam in the moving process along the parabolic dish slide rail;

in the optical mirror surface part, a rotary parabolic dish is fixed on an I # parabolic dish slide rail and an II # parabolic dish slide rail and is driven by a motor rotating according to the solar altitude to rotate around the horizontal central axis of a heat collector support beam along with the I # parabolic dish slide rail and the II # parabolic dish slide rail so as to track the solar altitude, a focal point is fixed on the horizontal central axis of a heat collector support beam in the movement process of the rotary parabolic dish, a rotary hyperboloid secondary reflector is fixed on the heat collector support beam, an upper focal point of the rotary hyperboloid secondary reflector is superposed with the focal point of the rotary parabolic dish, the connecting line of the upper focal point and a lower focal point of the rotary hyperboloid secondary reflector is vertical to the ground, and the lower focal point is positioned on an optical absorption unit light hole inlet plane, and due to the optical characteristics of the rotary hyperboloid reflector, light rays emitted to the upper focal point of the rotary hyperboloid reflector can be, in the heat collector, sunlight collected by the rotating parabolic dish is emitted to the upper focal point of the rotating hyperboloid secondary reflector and then reflected to the lower focal point by the rotating hyperboloid secondary reflector, so that the effect of a secondary reflection type light path with a fixed focal point is realized.

The heat collector main body is placed on a rotary base platform guide rail which is a circular rail, the rotary base platform is driven by a rotary motor rotating according to the solar azimuth angle to horizontally rotate along the rotary base platform guide rail so as to drive an optical mirror part of the heat collector to track the solar azimuth angle, an I # parabolic dish support rail and a II # parabolic dish support rail are arc-shaped rails with the circle centers positioned on the horizontal central axis of a cross beam of a heat collector support, the radii are equal, the arc lengths are the same and are vertically fixed on the rotary base platform, the I # parabolic dish slide rail and the II # parabolic dish slide rail are respectively placed on the I # parabolic dish support rail and the II # parabolic dish support rail and can slide along the support rails, rotary parabolic dishes are fixed on the I # parabolic dish slide rail and the II # parabolic dish slide rail and rotate around the horizontal central axis of the cross beam of the heat collector support along with the I, the double-shaft tracking method realizes that the focal spot of the rotating parabolic dish is fixed in the operation process of the heat collector, and is the basis for realizing the effect of a secondary reflection type light path with a fixed focal point.

The rotating hyperboloid secondary reflector is fixed on a cross beam of the heat collector support, an upper focal point of the rotating hyperboloid secondary reflector coincides with a focal point of the rotating parabolic dish, a connecting line of the upper focal point and a lower focal point of the rotating hyperboloid secondary reflector is perpendicular to the ground, the lower focal point is always located on a light hole inlet plane of the heat absorption unit, the rotating hyperboloid secondary reflector is taken from one part of a complete rotating hyperboloid, and the specific shape of the rotating hyperboloid secondary reflector is a part obtained by simulating the light scanning of the complete rotating hyperboloid in the process of the heat collector from the lowest solar altitude angle to the highest solar altitude angle.

The rotary parabolic dish is a part of a complete rotary paraboloid, and the specific shape is that firstly a shadow part caused by a rotary hyperboloid secondary reflector is cut off by taking the rotary center of the rotary paraboloid as a circle center, and then the part of the rotary paraboloid which can collide with a supporting platform in the running process of the heat collector is removed.

The supporting platform is fixed on the ground, the heat collector is kept to be fixed relative to the ground during operation, the heat absorption unit is placed on the supporting platform, and the height of the supporting platform is adjusted to enable the light hole inlet plane of the heat absorption unit to be located at the lower focal point of the rotating hyperboloid secondary reflector, so that the heat collector is suitable for different heat absorption units.

The invention has the following advantages and beneficial effects: through the designed double-shaft tracking method, the high-power point focusing disc type heat collector and the rotating hyperboloid secondary reflector are combined, the light path effect that light spots with high condensing ratio are fixed and light rays are reflected vertically downwards by secondary reflection is achieved, and the heat collector has the following characteristics:

(1) a newly designed double-shaft tracking method is adopted, namely, the rotary table rotates to drive the mirror surface part to track the solar azimuth angle, and the rotary parabolic dish rotates around the horizontal central axis of the cross beam of the heat collector support along with the parabolic dish sliding rail to track the solar altitude angle, so that the focal spot of the rotary parabolic dish is fixed in the operation process of the heat collector, and a favorable basis is provided for the subsequent light secondary reflection process.

(2) The sunlight gathered by the rotating parabolic dish is reflected by the rotating hyperboloid secondary reflector, the light emitted to the upper focal point of the rotating hyperboloid is reflected to the lower focal point right below, and the light spot is fixed and the light path effect that the light spot is fixed and the light secondary reflection is vertically downward is realized by combining the fixation of the focal spot of the rotating parabolic dish in the operation process of the heat collector.

(3) By utilizing the advantage of high light-gathering ratio of the rotary parabolic dish, the light-gathering ratio of the light spot vertically downward in secondary reflection is relatively high.

(4) The mode that the heat absorption unit is placed on the supporting platform is adopted, and the height of the supporting platform is adjusted to enable the unthreaded hole inlet plane of the heat absorption unit to be located at the lower focal point of the rotating hyperboloid secondary reflector, so that the heat collector is suitable for different heat absorption units.

Drawings

Fig. 1 is a perspective view of a fixed-focus secondary reflection dish solar collector.

In fig. 1: the heat collector comprises a 1-rotary base table guide rail, a 2-rotary base table, a 3-supporting platform, a 4-heat absorption unit, a 5-I # parabolic dish supporting rail, a 6-II # parabolic dish supporting rail, a 7-I # heat collector support, an 8-II # heat collector support, a 9-heat collector support cross beam, a 10-rotating hyperboloid secondary reflector, an 11-I # parabolic dish slide rail, a 12-rotating parabolic dish, a 13-I # bearing rod, a 14-II # bearing rod, a 15-III # bearing rod, a 16-IV # bearing rod and a 17-II # parabolic dish slide rail. 18-slewing motor, 19-motor.

Fig. 2 is a schematic diagram of the tracking principle of the heat collector.

Fig. 3 is a sectional view of a hyperboloid of revolution secondary mirror.

Fig. 4 is an isometric view of a rotating parabolic dish.

Detailed Description

The invention provides a focus fixed type secondary reflection disc type solar heat collector, which is described below by combining with the accompanying drawings.

The fixed-focus secondary reflection disc type solar heat collector shown in fig. 1 mainly comprises a rotary table part, a parabolic disc sliding rail part, an optical mirror part and power auxiliary equipment; the guide rail 1 of the rotary base platform is horizontally fixed on the ground, the rotary base platform 2 is arranged on the guide rail of the rotary base platform, the rotary base platform 2 is driven by a rotary motor 18 which rotates according to the azimuth angle of the sun to horizontally rotate along the guide rail 1 of the rotary base platform, the supporting platform 3 is fixed on the ground, and the heat absorption unit 4 is placed on the supporting platform 3; the I # parabolic dish supporting rail 5, the II # parabolic dish supporting rail 6, the I # heat collector support 7 and the II # heat collector support 8 are fixed on the rotary base platform 2 in parallel in the vertical direction, and the heat collector support cross beam 9 is fixed at the upper ends of the I # heat collector support 7 and the heat collector support II 8; the connecting line of the upper and lower focuses of the rotating hyperboloid secondary reflector 10 is vertically fixed on a cross beam 9 of the heat collector bracket; the I # parabolic dish slide rail 11 and the II # parabolic dish slide rail 17 are respectively arranged on the I # parabolic dish support rail 5 and the II # parabolic dish support rail 6 and driven by the motor 19 rotating according to the solar altitude angle to slide along the support rails, and the rotary parabolic dish 12 is fixed on the I # parabolic dish slide rail 11 and the II # parabolic dish slide rail 17 and moves along with the I # parabolic dish slide rail 11 and the II # parabolic dish slide rail 17; i # bearing rod 13 is hinged to the rear end of I # parabolic dish slide rail 11 and collector support beam 9, II # bearing rod 14 is hinged to the rear end of II # parabolic dish slide rail 17 and collector support beam 9, III # bearing rod 15 is hinged to the front end of I # parabolic dish slide rail 11 and collector support beam 9, and IV # bearing rod 16 is hinged to the front end of II # parabolic dish slide rail 17 and collector support beam 9.

As shown in fig. 2, the principle of the secondary reflection that the focus of the heat collector is fixed is realized, a rotating parabolic dish 12 is fixed on an I # parabolic dish sliding rail 11 and an II # parabolic dish sliding rail 17 and is driven by a motor 19 rotating according to the solar altitude angle to rotate around the horizontal central axis of a heat collector support beam 9 along with the I # parabolic dish sliding rail 11 and the II # parabolic dish sliding rail 17 so as to track the solar altitude angle, the focus of the rotating parabolic dish 12 is fixed on the horizontal central axis of the heat collector support beam 9 during the movement process, a rotating hyperboloid secondary reflector 10 is fixed on the heat collector support beam 9, the upper focus of the rotating hyperboloid secondary reflector 10 coincides with the focus of the rotating parabolic dish 12, the upper focus and the lower focus of the rotating parabolic dish 10 are connected to be perpendicular to the ground, and the lower focus is always located on the light inlet plane of the heat absorption unit, due to the optical characteristics, the light emitted to the upper focus of the rotating hyperboloid reflector is reflected to the lower focus of the rotating hyperboloid reflector, namely, in the heat collector, sunlight collected by the rotating parabolic dish 12 is emitted to the upper focus of the rotating hyperboloid secondary reflector 10 and is reflected to the lower focus of the rotating hyperboloid secondary reflector 10, and the secondary reflection light path effect with fixed focus is realized.

As shown in fig. 3, which is a sectional view of a hyperboloid-of-revolution secondary mirror, the hyperboloid-of-revolution secondary mirror 10 is taken from a part of a full hyperboloid of revolution, and is shaped to simulate an irradiated portion obtained by scanning the full hyperboloid of revolution with a light ray during a heat collector from a lowest solar altitude to a highest solar altitude.

As shown in the perspective view of the parabolic dish of fig. 4, the parabolic dish of revolution 12 is a part of a complete paraboloid of revolution, and the specific shape is that the shadow part caused by the secondary reflector 10 of the hyperboloid of revolution is cut off by taking the center of revolution of the paraboloid of revolution as the center of circle, and then the part of the paraboloid of revolution which collides with the supporting platform 3 during the operation of the heat collector is removed.

The above-mentioned contents are only for illustrating the concept of the present invention, and the protection scope of the present invention is not limited thereby, and all the concepts proposed by the present invention or the corresponding changes made on the basis of the technical solutions are considered as the protection scope of the present invention.