Linear fresnel collector field mirror end angle control device

Abstract

The application relates to the technical field of heat collection field control devices, in particular to a linear Fresnel heat collection field mirror end angle control device, a mounting mechanism, which comprises a first mounting part for mounting a mirror, a second mounting part for mounting an end mirror element and a first connecting shaft for connecting the first mounting part and the second mounting part, the second mounting part can rotate relative to the first mounting part around the central axis of the first connecting shaft; a driving mechanism is fixed with the first mounting part and is used for driving the second mounting part to rotate relative to the first mounting part; and a distance measuring mechanism is used for testing the distance between one end of the mirror and the ground, and the testing end of the distance measuring mechanism is always vertically downward. The application realizes active and dynamic correction of the edge light by the universal distance measuring mechanism and independently adjusting the angle of the end mirror element of the mirror end, the reflected light deviated from the heat collection tube due to the change of the sun position is re-directed to the heat collection tube, so that the heat collection efficiency and energy output of the whole linear Fresnel heat collection system are improved.

Description

Technical Field

[0001] This invention relates to the field of thermal collector field control devices, and in particular to a linear Fresnel thermal collector field reflector end angle control device. Background Technology

[0002] Linear Fresnel reflector solar concentrators, as an important medium- and low-temperature solar thermal utilization technology, have been widely used due to their advantages such as easy-to-manufacture and low-cost mirrors, and low wind load and strong wind resistance due to their close proximity to the ground. This system typically consists of multiple rows of parallel strip-shaped reflectors and their corresponding support and transmission mechanisms. Its concentrating principle is as follows: by adjusting the pitch angle of each row of reflectors through a single-axis tracking mechanism, the incident sunlight is reflected and focused onto a fixed, high-level collector tube, achieving high-density solar energy collection. The fixed nature of the absorber (collector tube) simplifies the connection of high-temperature piping and reduces the complexity of operation and maintenance.

[0003] However, this classic structure has a significant technical flaw in actual operation: the "end-point loss" problem. Because the sun's altitude and azimuth angles change during its movement, in single-axis tracking (usually tracking only the solar altitude angle), the light reflected from the ends of the reflectors (especially the end furthest from the rotation axis) gradually deviates from the fixed collector tubes as the solar azimuth angle changes, failing to converge effectively. Specifically, in a north-south oriented mirror field in the Northern Hemisphere, the southern end of the collector tubes experiences light loss in the morning due to insufficient light received from the end mirrors; in the afternoon, the loss shifts to the northern end. This end-point loss, inevitably caused by geometric optics, results in considerable optical energy waste, severely limiting the overall optical efficiency and energy output of the mirror field. Summary of the Invention

[0004] To address at least one of the aforementioned technical problems, this invention proposes a linear Fresnel thermal field reflector end angle control device to solve the problem of energy loss at the reflector end in existing mirror fields.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A linear Fresnel thermal field reflector end angle control device includes: The mounting mechanism includes a first mounting part for mounting a reflector, a second mounting part for mounting an end mirror element, and a first connecting shaft for connecting the first mounting part and the second mounting part. The second mounting part is rotatable relative to the first mounting part about the central axis of the first connecting shaft. The first mounting part includes: A first mounting plate has a first mounting groove for mounting the reflector, the first mounting groove being formed on the side of the first mounting plate away from the first connecting shaft; The first sleeve is rotatably sleeved on the outside of the first connecting shaft. The first sleeve is fixed at intervals on the first mounting plate along the length direction of the first mounting plate and on the side opposite to the first mounting groove. The second mounting part includes: The second mounting plate has a second mounting groove for mounting the end mirror element, the second mounting groove being formed on the side of the second mounting plate away from the first connecting shaft; The second sleeve is fixedly sleeved on the outside of the first connecting shaft. The second sleeve is fixedly fixed to the second mounting plate along the length direction of the second mounting plate and inserted between adjacent first sleeves. The central axis of the second sleeve coincides with that of the first sleeve. A drive mechanism, fixed to the first mounting part, is used to drive the second mounting part to rotate relative to the first mounting part in order to adjust the angle of the end mirror element; A ranging mechanism is used to test the distance between one end of the reflector and the ground, and the test end of the ranging mechanism is always vertically downward.

[0006] Preferably, the first mounting part further includes: The clamping components are arranged at intervals along the length of the first mounting plate to clamp the reflector into the first mounting groove.

[0007] Preferably, the second mounting portion further includes clamping components arranged at intervals along the length direction of the second mounting plate for pressing the end mirror element into the second mounting groove, and limiting members disposed on the second sleeve for restricting the rotation of the second sleeve relative to the first connecting shaft.

[0008] Preferably, the limiting member is a screw, and the second sleeve is provided with a screw hole adapted to the screw, and the screw is embedded and fixed in the screw hole.

[0009] Preferably, the clamping assembly includes: A clamping bolt is spaced along the first connecting shaft at corresponding positions in the first mounting groove and the second mounting groove. The first mounting groove and the second mounting groove are spaced apart and have bolt holes corresponding to the clamping bolt. A clamping plate is disposed in the first mounting groove and the second mounting groove, and the clamping plate is rotatably connected to the end of the adjacent clamping bolt; An elastic pad is disposed on the side of the clamping plate away from the clamping bolt.

[0010] Preferably, the drive mechanism includes: The mounting platform is fixed to the end of the first mounting plate away from the ranging mechanism. The motor is fixedly mounted on the mounting platform, and the output shaft of the motor is coaxially and fixedly connected to the first connecting shaft.

[0011] Preferably, the ranging mechanism includes: The second connecting shaft is coaxially connected to the end of the first connecting shaft that is away from the driving mechanism. A first rotating part is rotatably sleeved outside the second connecting shaft, and the central axis of the first rotating part coincides with the central axis of the second connecting shaft and / or the central axis of the first connecting shaft. The second rotating part is rotatably disposed below the first rotating part, and the central axis of the second rotating part is perpendicular to the central axis of the first rotating part. A rangefinder, used to measure the distance between one end of the reflector and the ground, is fixedly installed at the lower part of the second rotating part. The rangefinder is kept vertically downward by the freely rotating first and second rotating parts.

[0012] Preferably, it further includes a rotating bearing, which is fixedly sleeved on both ends of the second connecting shaft, and the first rotating part is sleeved and fixed outside the rotating bearing.

[0013] Preferably, the lower part of the first rotating part is provided with a receiving cavity for the second mounting part to be installed and rotated.

[0014] Preferably, the rangefinder is a laser rangefinder, and the second connecting shaft is connected to the first connecting shaft via a threaded structure.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention provides a second mounting part that rotates relative to a first mounting part. Based on the distance between one end of the reflector and the ground measured by the ranging mechanism, and combined with the installation height of the reflector, the tilt angle of the reflector surface is calculated. Based on the tilt angle of the reflector, the first connecting shaft is driven by the driving mechanism to rotate the second mounting part, thereby adjusting the end mirror element to an appropriate angle and dynamically correcting the end light. This allows sunlight at the end of the reflector to be focused onto the heat collection tube after being reflected by the end mirror element, reducing energy loss at the end and improving light utilization and mirror field efficiency.

[0016] 2. The staggered nesting layout of the mounting mechanism in this invention shortens the axial dimension, making the structure compact and naturally forming multiple span support points, thus enhancing the bending stiffness of the shaft system. Multiple sleeves are arranged at intervals along the length direction, effectively providing multiple support points for the connecting shaft, reducing shaft deflection and ensuring the uniformity and consistency of the rotation angle along the entire lens width.

[0017] 3. In this invention, the first and second rotating parts together constitute a two-degree-of-freedom universal joint with a counterweight self-balancing structure. Specifically, the first rotating part allows the entire rangefinding mechanism to rotate freely around the first connecting axis as the primary reflector rotates. The second rotating part is hinged to the first rotating part, allowing the rangefinder to rotate freely in a plane containing the axis of the first connecting axis and the ground normal. Under the combined action of the two rotating parts, the rangefinder itself is "decoupled" from the dynamic mirror coordinate system. Gravity becomes its sole orientation reference, keeping it vertically downward in inertial space (relative to the ground). This is equivalent to establishing a stable measurement reference that always points to the ground at the end of the moving mirror body. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of a linear Fresnel thermal field reflector end angle control device; Figure 2 A side view of a linear Fresnel thermal field reflector end angle control device; Figure 3 An exploded view of an end angle control device for a linear Fresnel thermal field reflector; Figure 4 This is a schematic diagram of the installation mechanism in this invention; Figure 5 This is a schematic diagram of the clamping assembly structure in this invention; Figure 6 This is a schematic diagram of the ranging mechanism in this invention.

[0019] In the diagram: 10. Mounting mechanism; 101. First mounting part; 1011. First mounting plate; 10111. First mounting groove; 1012. First sleeve; 102. Second mounting part; 1021. Second mounting plate; 10211. Second mounting groove; 1022. Second sleeve; 1023. Limiting component; 103. First connecting shaft; 104. Clamping assembly; 1041. Clamping bolt; 1042. Clamping plate; 20. Drive mechanism; 201. Mounting platform; 202. Motor; 30. Distance measuring mechanism; 301. Second connecting shaft; 302. First rotating part; 3021. Receiving cavity; 303. Second rotating part; 304. Distance measuring instrument; 305. Rotating bearing; 40. End-effector; 50. Reflector. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments of the present invention.

[0021] Please refer to Figures 1-6 As shown, a linear Fresnel thermal field reflector 50 end angle control device includes: Mounting mechanism 10 includes a first mounting part 101 for mounting a reflector 50, a second mounting part 102 for mounting an end mirror element 40, and a first connecting shaft 103 for connecting the first mounting part 101 and the second mounting part 102. The second mounting part 102 is rotatable relative to the first mounting part 101 about the central axis of the first connecting shaft 103. The drive mechanism 20 is fixed to the first mounting part 101 and is used to drive the second mounting part 102 to rotate relative to the first mounting part 101 in order to adjust the angle of the end mirror element 40. The distance measuring mechanism 30 is used to test the distance between one end of the reflector 50 and the ground. The test end of the distance measuring mechanism 30 is always vertically downward.

[0022] In this embodiment, a second mounting part 102 that rotates relative to the first mounting part 101 is provided. Based on the distance between one end of the reflector 50 and the ground measured by the ranging mechanism 30 and the mounting height of the reflector 50, the tilt angle of the reflector 50 is calculated. Based on the tilt angle of the reflector 50, the first connecting shaft 103 is driven by the driving mechanism 20 to rotate the second mounting part 102, thereby adjusting the end mirror element 40 to an appropriate angle and dynamically correcting the end light. This allows the sunlight at the end of the reflector 50 to be reflected by the end mirror element 40 and focused onto the heat collection tube, reducing energy loss at the end and improving light utilization and mirror field efficiency.

[0023] It should be noted that the sun's position varies throughout the day (elevation angle, azimuth angle), causing the light path to deviate. To improve the overall utilization of light, when the mirror field tracks the sun, the reflector 50 tilts and adjusts according to the sun's position, resulting in a change in the tilt angle of the reflector 50. The ranging mechanism 30 continuously monitors this altitude change, providing the drive mechanism 20 with real-time and direct adjustment data.

[0024] Please refer to Figures 1-4 As shown, in a preferred embodiment, the first mounting portion 101 includes: The first mounting plate 1011 has a first mounting groove 10111 for mounting the reflector 50, the first mounting groove 10111 being formed on the side of the first mounting plate 1011 away from the first connecting shaft 103; The first sleeve 1012 is rotatably sleeved on the outside of the first connecting shaft 103. The first sleeve 1012 is fixed at intervals on the first mounting plate 1011 along the length direction of the first mounting plate 1011 and on the side opposite to the first mounting groove 10111. The clamping assembly 104 is arranged at intervals along the length of the first mounting plate 1011 to clamp the reflector 50 into the first mounting groove 10111.

[0025] The second installation unit 102 includes: The second mounting plate 1021 has a second mounting groove 10211 for mounting the end mirror element 40. The second mounting groove 10211 is opened on the side of the second mounting plate 1021 away from the first connecting shaft 103. The second sleeve 1022 is fixedly sleeved on the outside of the first connecting shaft 103. The second sleeve 1022 is fixedly fixed on the second mounting plate 1021 at intervals along the length direction of the second mounting plate 1021 and inserted between adjacent first sleeves 1012. The central axis of the second sleeve 1022 coincides with that of the first sleeve 1012. The clamping assembly 104 is arranged at intervals along the length of the second mounting plate 1021 and is used to clamp the end mirror element 40 into the second mounting groove 10211. The limiting member 1023 is disposed on the second sleeve 1022 and is used to limit the rotation of the second sleeve 1022 relative to the first connecting shaft 103.

[0026] It should be noted that the overall structure of the first mounting part 101 and the second mounting part 102 in this embodiment is roughly the same. The difference is that the second sleeve 1022 is fixedly sleeved with the first connecting shaft 103, while the first sleeve 1012 is rotatably sleeved with the first connecting shaft 103. Through the nesting and cooperation of the first sleeve 1012 and the second sleeve 1022, a rotating pair is formed. The second sleeve 1022 is inserted between the first sleeves 1012, so that under the action of the driving mechanism 20, the second mounting plate 1021 can rotate smoothly relative to the first mounting plate 1011.

[0027] In this embodiment, the staggered nested layout of the mounting mechanism 10 shortens the axial dimension, making the structure compact and naturally forming multiple span support points, thereby enhancing the bending stiffness of the shaft system. The multiple sleeves are arranged at intervals along the length direction, effectively providing multiple support points for the connecting shaft, reducing shaft deflection and ensuring the uniformity and consistency of the rotation angle along the entire lens width.

[0028] Meanwhile, the modular design (primary lens module, end lens element 40 module) and standardized interface (coaxial sleeve) facilitate on-site installation, debugging, and maintenance. The kinematic pairs are simple (rotary joints), key connections are reliable (screw locking), and there are no easily damaged complex mechanisms, making it suitable for long-term use in harsh outdoor environments.

[0029] Please refer to Figure 4 As shown, in a preferred embodiment, the limiting member 1023 is a screw, and the second sleeve 1022 is provided with a screw hole that matches the screw, and the screw is embedded and fixed in the screw hole.

[0030] Specifically, the axial preload generated when the screw is screwed in creates a significant static friction between the screw tip (or flat end) and the cylindrical surface of the first connecting shaft 103, preventing relative rotation between them. Compared to keyed or interference-fit connections, this method facilitates installation and subsequent maintenance. Specifically, during initial installation and commissioning, the screw can be slightly loosened to fine-tune the "zero position" or initial angle of the end mirror element 40 before tightening it again. During later maintenance, if the drive motor 202 or connecting shaft needs replacement, it can be easily disassembled. This adjustability and maintainability are crucial for power plants that are installed on-site and operate long-term.

[0031] Meanwhile, the screw-embedded installation does not add any additional radial or axial dimensions, effectively preventing the exposed part of the screw from contacting the first mounting plate 1011 during the rotation of the second mounting plate 1021, thus blocking relative rotation and preventing the angle adjustment of the end mirror element 40 from failing to meet the requirements.

[0032] Please refer to Figure 4 and Figure 5 As shown, the clamping assembly 104 includes: The clamping bolt 1041 is spaced along the first connecting shaft 103 at corresponding positions of the first mounting groove 10111 and the second mounting groove 10211. The first mounting groove 10111 and the second mounting groove 10211 are spaced apart with bolt holes corresponding to the clamping bolt 1041. A clamping plate 1042 is disposed in the first mounting groove 10111 and the second mounting groove 10211, and the clamping plate 1042 is rotatably connected to the end of the adjacent clamping bolt 1041. An elastic pad is provided on the side of the clamping plate 1042 away from the clamping bolt 1041.

[0033] It is understandable that by having the clamping plate 1042 and the elastic pad contact the surfaces of the reflector 50 and the end mirror element 40, the contact area of ​​the clamping is increased, avoiding direct contact between the bolt head and the glass surface. However, a small contact area can easily cause local stress concentration, resulting in damage to the reflector 50 and the end mirror element 40.

[0034] The elastic pad absorbs minor impacts and vibrations, preventing hard collisions or friction between the lens and the rigid metal mounting plate. Simultaneously, it compensates for lens thickness tolerances, mounting groove machining tolerances, and potential unevenness on the lens back, ensuring uniform distribution of clamping force and preventing lens distortion (surface shape distortion) after installation. Maintaining the precise optical shape of the lens is fundamental to the efficient operation of the focusing system.

[0035] Meanwhile, the clamping plate 1042 corresponds to two clamping nuts, so that the clamping plate 1042 will not rotate with the twisting of the clamping bolt 1041 during installation, which facilitates quick and continuous adjustment of the clamping force.

[0036] Please refer to Figure 1 and Figure 3 As shown, in a preferred embodiment, the drive mechanism 20 includes: Mounting platform 201 is fixed to the end of first mounting plate 1011 away from ranging mechanism 30; Motor 202 is fixedly mounted on mounting platform 201, and the output shaft of motor 202 is fixedly connected to the first connecting shaft 103 along the same axis.

[0037] Specifically, the mounting platform 201 is fixed to the first mounting plate 1011, making the motor housing 202 rigidly connected to the first mounting plate 1011. This forms a rigid rotor system consisting of the motor 202 rotor, output shaft, first connecting shaft 103, and second sleeve 1022. This effectively resists the additional torque generated by external disturbances such as wind loads on the shaft system, maintains the stability of the end mirror element at the 40° angle, and avoids mirror surface vibration due to structural flexibility.

[0038] Meanwhile, the output shaft of motor 202 is directly connected to the first connecting shaft 103, eliminating the intermediate connecting mechanism, reducing the number of structural components, improving mechanical transmission efficiency, and reducing the failure rate of drive mechanism 20. It should be noted that the output shaft of motor 202 and the first connecting shaft 103 can be connected by a thread, which facilitates disassembly, assembly, and subsequent maintenance.

[0039] Please refer to Figure 1 , Figure 3 and Figure 6 As shown, in a preferred embodiment, the ranging mechanism 30 includes: The second connecting shaft 301 is coaxially connected to the end of the first connecting shaft 103 that is away from the drive mechanism 20; The first rotating part 302 is rotatably sleeved outside the second connecting shaft 301, and the central axis of the first rotating part 302 coincides with the central axis of the second connecting shaft 301 and / or the first connecting shaft 103. The second rotating part 303 is rotatably disposed below the first rotating part 302, and the central axis of the second rotating part 303 is perpendicular to the central axis of the first rotating part 302. The rangefinder 304 is used to test the distance between one end of the reflector 50 and the ground. It is fixedly installed at the lower part of the second rotating part 303. Through the free rotation of the first rotating part 302 and the second rotating part 303, the rangefinder 304 is kept vertically downward.

[0040] It should be noted that in this embodiment, the first rotating part 302 and the second rotating part 303 together constitute a two-degree-of-freedom universal joint with a counterweight self-balancing structure. Specifically, the first rotating part 302 allows the entire ranging mechanism 30 to rotate freely around the first connecting shaft 103 as the main reflecting mirror 50 rotates. The second rotating part 303 is hinged to the first rotating part 302, allowing the rangefinder 304 to rotate freely in a plane containing the axis of the first connecting shaft 103 and the ground normal. Under the combined action of the two rotating parts, the rangefinder 304 itself is "decoupled" from the dynamic mirror coordinate system. Gravity becomes its only orientation reference, keeping it vertically downward in inertial space (relative to the ground). This is equivalent to establishing a stable measurement reference that always points to the ground at the end of the moving mirror body.

[0041] In addition, directly measuring height changes avoids the cumulative and calibration errors caused by data fusion using multiple sensors (such as a dual-axis inclinometer). In this embodiment, the rangefinder 304 is a laser rangefinder 304. The absolute distance measured by laser ranging is less affected by environmental factors such as temperature and humidity, thus improving the accuracy of the final angle adjustment of the end mirror element 40.

[0042] In a preferred embodiment, to prevent the rangefinder 304 from oscillating for an extended period during gusts of wind or when the mirror is started and stopped, appropriate mechanical damping (such as an oil damper) is added to the first rotating part 302 and the second rotating part 303 to enable it to stabilize quickly.

[0043] Please refer to Figure 6 As shown, in this embodiment, the rotation of the first rotating part 302 and the second rotating part 303 can both be achieved by the rotating bearing 305. Specifically, the rotating bearing 305 is fixedly sleeved on both ends of the second connecting shaft 301, and the first rotating part 302 is sleeved and fixed on the outside of the rotating bearing 305.

[0044] Meanwhile, to facilitate the installation and rotation of the second mounting part 102, a receiving cavity 3021 is provided at the lower part of the first rotating part 302 in this embodiment. Specifically, the receiving cavity 3021 can prevent the second rotating part 303 from colliding with the first mounting part 101 when it rotates and is adjusted, thus ensuring that the multi-motion system can work in a coordinated and reliable manner within a limited space.

[0045] This invention achieves active and dynamic correction of edge light by independently adjusting the angle of the end mirror element 40 at the end of the reflector 50. This redirects reflected light that has deviated from the collector tube due to changes in the sun's position back to the collector tube, thereby improving the heat collection efficiency and energy output of the entire linear Fresnel solar collector system. Using a gimbal-type ranging mechanism 30, the attitude change (tilt angle) of the reflector 50 is converted into a vertical distance signal in real time. This signal is directly related to the optical path deviation caused by changes in the sun's position, providing a simple and effective input parameter for controlling the angle of the end mirror element 40.

[0046] This device uses modular and standardized components and an easy-to-assemble and adjust structure, which reduces manufacturing costs and maintenance difficulty.

[0047] The above description is a specific implementation of the embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A device for controlling the end angle of a linear Fresnel thermal field reflector, characterized in that, include: The mounting mechanism (10) includes a first mounting part (101) for mounting a reflector (50), a second mounting part (102) for mounting an end mirror element (40), and a first connecting shaft (103) for connecting the first mounting part (101) and the second mounting part (102). The second mounting part (102) is rotatable relative to the first mounting part (101) about the central axis of the first connecting shaft (103). The first mounting part (101) includes: The first mounting plate (1011) has a first mounting groove (10111) for mounting the reflector (50), the first mounting groove (10111) being formed on the side of the first mounting plate (1011) away from the first connecting shaft (103); The first sleeve (1012) is rotatably sleeved on the outside of the first connecting shaft (103). The first sleeve (1012) is fixed at intervals on the first mounting plate (1011) along the length direction of the first mounting plate (1011) and on the side opposite to the first mounting groove (10111). The second mounting part (102) includes: The second mounting plate (1021) has a second mounting groove (10211) for mounting the end mirror element (40), the second mounting groove (10211) being formed on the side of the second mounting plate (1021) away from the first connecting shaft (103); The second sleeve (1022) is fixedly sleeved on the outside of the first connecting shaft (103). The second sleeve (1022) is fixedly fixed on the second mounting plate (1021) at intervals along the length direction of the second mounting plate (1021) and inserted between adjacent first sleeves (1012). The central axis of the second sleeve (1022) coincides with that of the first sleeve (1012). The driving mechanism (20) is fixed to the first mounting part (101) and is used to drive the second mounting part (102) to rotate relative to the first mounting part (101) to adjust the angle of the end mirror element (40) and reflect the reflected light at the end of the reflector (50) to the heat collection tube. The distance measuring mechanism (30) is used to test the distance between one end of the reflector (50) and the ground. The test end of the distance measuring mechanism (30) is always vertically downward.

2. The linear Fresnel thermal field reflector end angle control device according to claim 1, characterized in that, The first mounting part (101) further includes: The clamping assembly (104) is arranged at intervals along the length of the first mounting plate (1011) to clamp the reflector (50) into the first mounting groove (10111).

3. The linear Fresnel thermal field reflector end angle control device according to claim 2, characterized in that, The second mounting part (102) further includes clamping components (104) arranged at intervals along the length direction of the second mounting plate (1021) for pressing the end mirror element (40) into the second mounting groove (10211) and limiting members (1023) disposed on the second sleeve (1022) for restricting the rotation of the second sleeve (1022) relative to the first connecting shaft (103).

4. The linear Fresnel thermal field reflector end angle control device according to claim 3, characterized in that, The limiting member (1023) is a screw, and the second sleeve (1022) is provided with a screw hole adapted to the screw, and the screw is embedded and fixed in the screw hole.

5. The linear Fresnel thermal field reflector end angle control device according to claim 3, characterized in that, The clamping assembly (104) includes: A clamping bolt (1041) is provided at intervals along the first connecting shaft (103) at corresponding positions of the first mounting groove (10111) and the second mounting groove (10211). The first mounting groove (10111) and the second mounting groove (10211) are provided at intervals with bolt holes corresponding to the clamping bolt (1041). A clamping plate (1042) is disposed in the first mounting groove (10111) and the second mounting groove (10211), and the clamping plate (1042) is rotatably connected to the end of the adjacent clamping bolt (1041); An elastic pad is disposed on the side of the clamping plate (1042) away from the clamping bolt (1041).

6. The linear Fresnel thermal field reflector end angle control device according to claim 2, characterized in that, The drive mechanism (20) includes: The mounting platform (201) is fixed to the end of the first mounting plate (1011) away from the ranging mechanism (30); The motor (202) is fixedly mounted on the mounting platform (201), and the output shaft of the motor (202) is fixedly connected to the first connecting shaft (103) along the same axis.

7. The linear Fresnel thermal field reflector end angle control device according to claim 1, characterized in that, The ranging mechanism (30) includes: The second connecting shaft (301) is coaxially connected to the end of the first connecting shaft (103) away from the drive mechanism (20); The first rotating part (302) is rotatably sleeved outside the second connecting shaft (301), and the central axis of the first rotating part (302) coincides with the central axis of the second connecting shaft (301) and / or the first connecting shaft (103); The second rotating part (303) is rotatably disposed below the first rotating part (302), and the central axis of the second rotating part (303) is perpendicular to the central axis of the first rotating part (302); The rangefinder (304) is used to test the distance between one end of the reflector (50) and the ground. It is fixedly installed at the lower part of the second rotating part (303). The rangefinder (304) is kept vertically downward by the free-rotating first rotating part (302) and the second rotating part (303).

8. The linear Fresnel thermal field reflector end angle control device according to claim 7, characterized in that, It also includes a rotating bearing (305), which is fixedly sleeved on both ends of the second connecting shaft (301), and the first rotating part (302) is sleeved and fixed on the outside of the rotating bearing (305).

9. The linear Fresnel thermal field reflector end angle control device according to claim 8, characterized in that, The lower part of the first rotating part (302) is provided with a receiving cavity (3021) for the second mounting part (102) to be mounted and rotated.

10. The linear Fresnel thermal field reflector end angle control device according to claim 7, characterized in that, The rangefinder (304) is a laser rangefinder (304), and the second connecting shaft (301) is connected to the first connecting shaft (103) by a threaded structure.

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