A solar heat collecting tube

Abstract

The present invention relates to the technical field of solar heat collecting tubes, and specifically to a solar heat collecting tube, comprising a bracket and a water storage bucket fixed on the upper end of the bracket, a heat collecting tube fixed inside the bracket, the upper end of the heat collecting tube extending through and fixed inside the water storage bucket, and the lower end fixed to the bracket, side frames are arranged on both sides of the heat collecting tube, the side frames are fixed to the bracket, a shielding mechanism is arranged between the side frames on both sides, and the heat collecting tube is located inside the shielding mechanism, and the present invention can automatically adjust to shield the heat collecting tube by designing the shielding mechanism to ensure normal heat conversion, thereby avoiding continuous exposure of the heat collecting tube and reducing damage to the heat collecting tube, and the shielding mechanism can also protect the heat collecting tube by designing the shielding mechanism, which can not only reduce the adhesion of dust and debris such as bird droppings to affect the heat conversion efficiency of the heat collecting tube, but also protect the heat collecting tube in rainy, snowy and hail weather.

Description

Technical Field

[0001] The invention relates to the technical field of solar heat collecting tubes, in particular to a solar heat collecting tube. Background Art

[0002] Solar water heaters are devices that use sunlight to heat water. Solar water heaters are divided into vacuum tube solar water heaters and flat plate solar water heaters. Vacuum tube solar water heaters occupy 95% of the domestic market share. Vacuum tube household solar water heaters are composed of heat collecting tubes, water storage tanks, brackets and other related parts. The conversion of solar energy into heat energy mainly relies on vacuum heat collecting tubes. The principle of hot water floating and cold water sinking is used to make water microcirculate to achieve the required hot water.

[0003] Existing solar collector tubes are prone to high-temperature evaporation and water shortage in the process of using sunlight to heat water, and the solar tubes may burst. This is especially true in the hot summer when the outdoor temperature is high and the tubes are exposed to high-temperature sunlight for a long time. Such situations often occur. At the same time, the cold water inside the collector tube can boil at high temperature in a short time under such high temperature conditions. If the tube is continuously exposed to high temperature, the water inside the collector tube will continue to boil. At this time, the collector tube will not only experience reduced water evaporation or the possibility of bursting, but the water inside will continue to boil, and a large amount of scale will form in the water, and a large number of scale nodules will appear inside the collector tube, affecting the heat conversion efficiency of the collector tube.

[0004] Therefore, a solar heat collecting tube is proposed. Summary of the invention

[0005] The object of the present invention is to provide a solar heat collecting tube to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a solar energy heat collecting tube, comprising a bracket and a water storage bucket fixed on the upper end of the bracket, a heat collecting tube fixed inside the bracket, the upper end of the heat collecting tube extends through and is fixed inside the water storage bucket, and the lower end is fixed to the bracket, side frames are arranged on both sides of the heat collecting tube, the side frames are fixed to the bracket, a shielding mechanism is arranged between the side frames on both sides, and the heat collecting tube is located inside the shielding mechanism, a driving motor is fixed at one end of the water storage bucket and at a position corresponding to one side of the side frame, the driving motor is connected with the shielding mechanism by transmission, and the shielding mechanism can be driven by the driving motor to adjust the shielding of the heat collecting tube, thereby reducing the probability of bursting and damage of the heat collecting tube.

[0007] Preferably, the shielding mechanism includes rotating grooves opened on adjacent surfaces of the side frames on both sides, the interior of the rotating groove is rotatably connected with a driving column, the output end of the driving motor passes through the side frame and extends to the interior of the rotating groove and is fixedly connected to the upper end of the driving column, the outer surfaces of the driving columns on both sides are wrapped with shielding belts, and the heat collecting tubes are located inside the shielding belts.

[0008] Preferably, the lower end of the rotating groove is open, the lower end of the side frame is bolted to a sealing plate, the sealing plate closes the lower end opening of the rotating groove, and a cleaning assembly is also provided inside the side frame.

[0009] Preferably, the shielding belt is composed of a reflective sunshade film and a transparent rubber layer, which are connected and fixed by Velcro, and the two have the same volume size, wherein a heat insulation layer is glued and fixed to the lower end surface of the reflective sunshade film, the heat insulation layer is composed of graphene modified rubber, and a bubble-like capsule is arranged inside the heat insulation layer.

[0010] Preferably, the cleaning component includes a liquid storage tank which is symmetrically opened up and down with the rotating groove as the center, the liquid storage tank is fully loaded with cleaning liquid, and a cleaning cotton board is slidably connected to one end of the liquid storage tank, one end of the cleaning cotton board is T-shaped and matches the liquid storage tank, and the other end is designed in an arc structure to fit on the shielding belt wrapped around the outer surface of the driving column.

[0011] Preferably, the cleaning assembly further comprises cleaning paddles symmetrically mounted at the opening of the rotating groove, and the two cleaning paddles are relatively inclined and distributed with adjacent ends abutting against the shielding belt.

[0012] Preferably, a transmission structure is provided at the upper ends of the two side frames, and an oscillation mechanism is provided in the middle of the transmission structure.

[0013] Preferably, the transmission structure includes a transmission wheel fixed to the extended portion of the upper end of the driving column inside the two side frames, and the two transmission wheels are connected by a belt winding transmission.

[0014] Preferably, the oscillation mechanism includes a driving wheel rotatably connected to the middle part of the front end surface of the water storage barrel via a rotating shaft, the front end of the driving wheel is fixedly connected to a rotating disk, the front end surface of the rotating disk is designed with a conical structure, and symmetrically provided with sliding grooves, the interior of the sliding groove is slidably connected to a slider, a spring is arranged between the lower side of the slider and the bottom of the sliding groove, the front end surfaces of the sliders are rotatably connected to rotating shafts, and the two rotating shafts are both located inside the shielding belt.

[0015] Preferably, the slider and the slide groove are in a T-shaped structure and match each other and cannot be separated, and the rotating shaft is made of ceramic material.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention can automatically adjust the shielding of the heat collecting tubes by designing a shielding mechanism to ensure normal heat conversion, thereby avoiding continuous exposure of the heat collecting tubes and reducing damage to the heat collecting tubes. The shielding mechanism can also protect the heat collecting tubes, which can not only reduce the adhesion of dust and debris such as bird droppings that affect the heat conversion efficiency of the heat collecting tubes, but also protect the heat collecting tubes in rain, snow and hail weather. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is the overall structural view of the present invention;

[0020] Figure 2 It is a left side view of the overall structure of the present invention;

[0021] Figure 3 For the present invention Figure 1 Sectional view at AA;

[0022] Figure 4 It is a schematic diagram of the combination of the reflective sunshade film and the transparent rubber layer of the present invention;

[0023] Figure 5 For the present invention Figure 3 The enlarged schematic diagram of point B in the middle;

[0024] Figure 6 is a cross-sectional view of a side frame of the present invention;

[0025] Figure 7 For the present invention Figure 3 Cross-section at mid-CC;

[0026] Figure 8 It is a flow chart of the control system of the present invention.

[0027] Description of reference numerals:

[0028] 1. Bracket; 2. Water storage tank; 3. Heat collecting tube; 4. Side frame; 5. Belt; 51. Driving motor;

[0029] 6. Oscillating mechanism; 61. Rotating plate; 62. Driving wheel; 63. Sliding block; 64. Rotating shaft; 65. Spring; 66. Sliding groove;

[0030] 7. shielding mechanism; 71. driving column; 72. rotating groove; 73. sealing plate; 74. shielding belt; 75. cleaning assembly;

[0031] 741, reflective sunshade film; 742, transparent rubber layer; 743, heat insulation layer; 744, capsule;

[0032] 751. Clean the paddles; 752. Clean the cotton board; 753. Liquid storage tank. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figures 1 to 8 , the present invention provides a technical solution:

[0035] A solar heat collecting tube comprises a bracket 1 and a water storage barrel 2 fixed on the upper end of the bracket 1, a heat collecting tube 3 is fixed inside the bracket 1, the upper end of the heat collecting tube 3 extends through and is fixed inside the water storage barrel 2, and the lower end is fixed to the bracket 1, side frames 4 are arranged on both sides of the heat collecting tube 3, the side frames 4 are fixed to the bracket 1, a shielding mechanism 7 is arranged between the side frames 4 on both sides, and the heat collecting tube 3 is located inside the shielding mechanism 7, a driving motor 51 is fixed at one end of the water storage barrel 2 and at a position corresponding to one side of the side frame 4, the driving motor 51 is connected to the shielding mechanism 7 by transmission, and the shielding mechanism 7 can be driven by the driving motor 51 to adjust the shielding of the heat collecting tube 3, thereby reducing the probability of bursting and damage of the heat collecting tube 3.

[0036] By adopting the above technical scheme, the present invention can automatically adjust the shielding of the heat collecting tube 3 by designing a shielding mechanism 7, so as to ensure normal heat conversion, thereby avoiding continuous exposure of the heat collecting tube 3 and reducing damage to the heat collecting tube 3. In addition, the shielding mechanism 7 can also protect the heat collecting tube 3, which can not only reduce the adhesion of dust and debris such as bird droppings that affect the heat conversion efficiency of the heat collecting tube 3, but also protect the heat collecting tube 3 in rainy, snowy and hail weather.

[0037] As an embodiment of the present invention, Figure 1 and Figure 3As shown, the shielding mechanism 7 includes a rotating groove 72 opened on adjacent surfaces of the side frames 4 on both sides, and the rotating groove 72 is internally rotatably connected with a driving column 71, and the output end of the driving motor 51 passes through the side frame 4 and extends to the inside of the rotating groove 72 and is fixedly connected to the upper end of the driving column 71, and the outer surface of the driving column 71 on both sides is wrapped with a shielding belt 74, and the heat collecting tube 3 is located inside the shielding belt 74, and the lower end of the rotating groove 72 is open, and the lower end of the side frame 4 is bolted with a sealing plate 73, and the sealing plate 73 closes the lower end opening of the rotating groove 72, and a cleaning component 75 is also provided inside the side frame 4, and the shielding belt 74 is composed of a reflective sunshade film 741 and a transparent rubber layer 742, and the connection between the two is fixed by Velcro, and the two consist of the same volume, wherein the lower end surface of the reflective sunshade film 741 is glued and fixed with a heat insulation layer 743, and the heat insulation layer 743 is composed of graphene modified rubber, and a bubble-shaped capsule 744 is provided inside the heat insulation layer 743.

[0038] By adopting the above technical solution, when working, the heat collecting tube 3 heats the water inside under the irradiation of sunlight. Once the sunlight continues to irradiate the heat collecting tube 3, the water temperature inside it rises and boils, and the pressure inside the heat collecting tube 3 and the water storage tank 2 increases and is monitored in real time by the pressure sensor. Once the pressure exceeds the preset range inside the controller, the controller controls the driving motor 51 to rotate, and the driving motor 51 drives the driving column 71 to rotate, and the driving column 71 further drives the shielding belt 74 wrapped on its outer surface to rotate, so as to shield the heat collecting tube 3 located inside the shielding belt 74. Since the shielding belt 74 is composed of two parts, a transparent rubber layer 742 and a reflective sunshade film 741, when the controller After the controller controls the driving motor 51 to rotate a certain number of times, the driving column 71 rotates to drive the reflective sunshade film 741 in the shielding belt 74 to be just above the heat collecting tube 3, completely shielding the heat collecting tube 3 inside, blocking the sunlight from irradiating the heat collecting tube 3, thereby preventing the heat collecting tube 3 from bursting due to long-term continuous exposure to the sun and the formation of a large amount of internal scale. Once the pressure sensor detects a pressure lower than the normal set range, similarly, the driving column 71 is rotated to make the transparent rubber layer 742 located just above the heat collecting tube 3, and the sunlight shines through the transparent rubber layer 742 to irradiate the heat collecting tube 3 for normal energy conversion. The two are attached with Velcro for easy disassembly, replacement and maintenance.

[0039] As an embodiment of the present invention, Figure 3 and Figure 5As shown, the cleaning component 75 includes a liquid storage tank 753 which is symmetrically opened up and down with the rotating groove 72 as the center. The liquid storage tank 753 is fully loaded with cleaning liquid. One end of the liquid storage tank 753 is slidably connected to a cleaning cotton plate 752. One end of the cleaning cotton plate 752 is T-shaped and matched with the liquid storage tank 753, and the other end is arc-shaped and designed to fit on the shielding belt 74 wrapped around the outer surface of the driving column 71. The cleaning component 75 also includes cleaning paddles 751 symmetrically installed at the opening of the rotating groove 72. The two cleaning paddles 751 are relatively inclined and distributed, and the adjacent ends are in contact with the shielding belt 74.

[0040] By adopting the above technical solution and based on the above embodiment, the cleaning component 75 also operates during this process. Under normal weather, dust will still adhere to the surface of the shielding belt 74 after long-term use. Therefore, during the rotation of the driving column 71, the cleaning cotton plate 752 can be used to absorb the cleaning liquid inside the liquid storage tank 753 and then wipe the shielding belt 74 passing through the surface of the driving column 71. The function of the cleaning paddle 751 is to prevent larger debris on the surface, such as tree branches, from entering the rotating groove 72 and affecting the normal driving of the internal components. The same cleaning liquid can be replenished. If it is aimed at the above-mentioned rainy and snowy weather, antifreeze cleaning liquid can be added to the liquid storage tank 753. This not only can clean the shielding belt 74, but also can prevent the surface of the shielding belt 74 from ice and frost.

[0041] As an embodiment of the present invention, Figure 1 and Figure 3 as well as Figure 7 As shown, a transmission structure is provided at the upper ends of the two side frames 4, and an oscillation mechanism 6 is provided in the middle of the transmission structure. The transmission structure includes a transmission wheel fixed to the upper extension portion of the internal driving column 71 of the side frames 4 on both sides, and the two transmission wheels are connected by a belt 5 wrapped around the transmission.

[0042] By adopting the above technical solution, it is worth noting that only by rotating the driving column 71 on one side to drive the shielding belt 74 to rotate, and then driving the driving column 71 on the other side to rotate, the shielding belt 74 is easily damaged by stress and pulling for a long time. Therefore, the transmission structure designed at the upper end of the driving columns 71 on both sides uses the belt 5 to cooperate with the transmission wheel on one side of the driving motor 51 to achieve better power transmission, so that the driving motor 51 directly controls the rotation of the driving columns 71 on both sides, and then controls the displacement of the shielding belt 74.

[0043] As an embodiment of the present invention, Figure 1 and Figure 3 , Figure 7As shown, the oscillation mechanism 6 includes a driving wheel 62 rotatably connected to the middle part of the front end surface of the water storage barrel 2 through a rotating shaft, and a rotating disk 61 is fixedly connected to the front end of the driving wheel 62. The front end surface of the rotating disk 61 is designed with a conical structure and symmetrically provided with slide grooves 66. A slider 63 is slidably connected inside the slide groove 66. A spring 65 is provided between the lower side of the slider 63 and the bottom of the slide groove 66. The front end surfaces of the sliders 63 are rotatably connected to rotating shafts 64. The two rotating shafts 64 are both located inside the shielding belt 74. The slider 63 and the slide groove 66 are T-shaped structures that match each other and cannot be separated, and the rotating shaft 64 is made of ceramic material.

[0044] By adopting the above technical solution, the belt 5 is used to cooperate with the transmission wheel on one side of the drive motor 51 to achieve better power transmission, so that the drive motor 51 can directly control the rotation of the drive columns 71 on both sides, and then control the displacement of the shielding belt 74, and the oscillation mechanism 6 in the middle of the transmission structure that cooperates with the shielding belt 74 can cooperate with the shaking of the shielding belt 74 in the rotating state to clean the dust or fallen debris on its surface. Especially for heavy snow weather, the snow layer accumulates on the surface of the shielding belt 74, affecting the heat conversion of the heat collecting tube 3 and thus affecting the efficiency of the equipment. Therefore, when the drive motor 51 drives the shielding belt 74 to rotate, the belt 5 in the transmission structure will also drive the drive wheel 62 to rotate and then drive the rotating disk 61 to rotate. At this time, the rotating shaft 64 symmetrically distributed on the front end of the rotating disk 61 will continuously contact the shielding belt 74 when it is symmetrically distributed up and down, and then be hindered by the stress of the shielding belt 74, and the slider 6 at one end of the rotating shaft 64 will 3, in the slide groove 66 provided on the conical surface of the front end surface of the rotating disk 61, the springs 65 located in the slide groove 66 are located in the opposite direction and squeezed toward the center. Since the front end surface of the rotating disk 61 is designed with a conical structure, the slide groove 66 is an inclined structure. Therefore, during the displacement of the slider 63, the contact area between the outer surface of the rotating shaft 64 and the shielding belt 74 gradually decreases until the rotating shaft 64 is completely separated from the shielding belt 74. Due to the elastic characteristics of the transparent rubber layer 742 in the shielding belt 74, a momentary jitter will be generated. After the rotating shaft 64 is separated from the obstruction of the shielding belt 74, it is reset under the action of the spring 65. At this time, the rotating shaft 64 is symmetrical in the left and right directions under the rotation of the rotating disk 61. Through the above-mentioned action, the shielding belt 74 is repeatedly stretched and separated from the shielding belt 74, and the shielding belt 74 vibrates, thereby clearing the snow on the outer surface of the shielding belt 74. The snow will slide down at the inclined angle of the shielding belt 74, achieving a better cleaning effect.

[0045] Working principle: A solar power generation component (including photovoltaic panels, batteries and inverters) is installed on the upper end surface of the water storage barrel 2, a controller is installed on one side of the drive motor 51, and a pressure sensor is installed inside the water storage barrel 2. The controller has an Internet module connected to the Internet and updates the weather conditions in real time. The solar power generation component is electrically connected to the pressure sensor, the drive motor 51 and the controller. The controller, the drive motor 51 and the pressure sensor are also connected to the household circuit. When working, the heat collecting tube 3 heats the water inside under the irradiation of sunlight. Once the sunlight continues to irradiate the heat collecting tube 3, the water temperature inside it rises and boils. The pressure inside the heat collecting tube 3 and the water storage barrel 2 increases and is monitored in real time by the pressure sensor. Once the pressure exceeds the preset range value inside the controller, the controller controls the drive motor 51 to rotate, and the drive motor 51 drives the drive column 71 to rotate, and the drive The moving column 71 further drives the shielding belt 74 wrapped on its outer surface to rotate, so as to shield the heat collecting tube 3 located inside the shielding belt 74. Since the shielding belt 74 is composed of two parts, namely, a transparent rubber layer 742 and a reflective sunshade film 741, when the controller controls the driving motor 51 to rotate a certain number of times, the driving column 71 rotates to drive the reflective sunshade film 741 in the shielding belt 74 to be exactly above the heat collecting tube 3, so as to completely shield the heat collecting tube 3 located inside, block the sunlight from irradiating the heat collecting tube 3, and thus prevent the heat collecting tube 3 from bursting due to long-term continuous exposure to the sun and the formation of a large amount of internal scale. Once the pressure sensor detects a pressure lower than the normal setting range, similarly, the driving column 71 rotates so that the transparent rubber layer 742 is located just above the heat collecting tube 3, and the sunlight shines on the heat collecting tube 3 through the transparent rubber layer 742 to perform normal energy conversion.

[0046] It is worth noting that only by rotating the driving column 71 on one side to drive the shielding belt 74 to rotate, and then drive the driving column 71 on the other side to rotate, the shielding belt 74 is easily damaged by being subjected to stress and pulling for a long time. Therefore, the transmission structure designed at the upper ends of the driving columns 71 on both sides uses the belt 5 to cooperate with the transmission wheel on one side of the driving motor 51 to achieve better power transmission, so that the driving motor 51 directly controls the rotation of the driving columns 71 on both sides, and then controls the displacement of the shielding belt 74, and the oscillation mechanism 6 in the middle part of the transmission structure that cooperates with the shielding belt 74 can cooperate with the shaking of the shielding belt 74 in the rotating state to prevent dust or falling on its surface Debris cleaning, especially in heavy snow weather, snow accumulates on the surface of the shielding belt 74, affecting the heat conversion of the heat collecting tube 3, and thus affecting the efficiency of the equipment. Therefore, when the driving motor 51 drives the shielding belt 74 to rotate, the belt 5 in the transmission structure will also drive the driving wheel 62 to rotate and then drive the rotating disk 61 to rotate. At this time, the rotating shaft 64 symmetrically distributed on the front end of the rotating disk 61 will continuously contact the shielding belt 74 when it is symmetrically distributed up and down, and then be hindered by the stress of the shielding belt 74, and the slider 63 at one end of the rotating shaft 64 will face each other in the slide groove 66 opened on the conical surface of the front end of the rotating disk 61. The spring 65 located in the slide groove 66 is squeezed toward the center. Since the front end surface of the rotating disk 61 is designed with a conical structure, the slide groove 66 is an inclined structure. Therefore, during the displacement of the slider 63, the contact surface between the outer surface of the rotating shaft 64 and the shielding belt 74 gradually decreases until the rotating shaft 64 is completely separated from the shielding belt 74. Due to the elastic characteristics of the transparent rubber layer 742 in the shielding belt 74, a momentary jitter will be generated. After the rotating shaft 64 is separated from the obstruction of the shielding belt 74, it is reset under the action of the spring 65. At this time, the rotating shaft 64 is symmetrical in the left and right directions under the rotation of the rotating disk 61. The above action is repeated The shielding belt 74 is stretched and separated, and the shielding belt 74 vibrates, thereby cleaning the snow on the outer surface of the shielding belt 74. The snow will slide down at the inclined angle of the shielding belt 74, achieving a better cleaning effect. At the same time, in hail weather, hail may directly fall and damage the heat collecting tube 3, so the shielding belt 74 can protect it and prevent the hail from damaging the shielding belt 74. Secondly, the reflective sunshade film 741 can be rotated to be located directly above the heat collecting tube 3. The sac-shaped bubbles inside the heat insulation layer 743 can buffer the impact force of hail and greatly improve the heat insulation effect.

[0047] During this process, the cleaning component 75 is also running. Under normal weather conditions, dust will still adhere to the surface of the shielding belt 74 after long-term use. Therefore, during the rotation of the driving column 71, the cleaning cotton plate 752 can be used to absorb the cleaning liquid inside the liquid storage tank 753 and then wipe the shielding belt 74 passing the surface of the driving column 71. The function of the cleaning paddle 751 is to prevent larger debris on the surface, such as tree branches, from entering the rotating groove 72 and affecting the normal driving of the internal components. The same cleaning liquid can be replenished. If it is for the above-mentioned rainy and snowy weather, antifreeze cleaning liquid can be added to the liquid storage tank 753. This not only can clean the shielding belt 74, but also can prevent the surface of the shielding belt 74 from ice and frost.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A solar heat collecting tube, comprising a bracket (1) and a water storage bucket (2) fixed to the upper end of the bracket (1), a heat collecting tube (3) fixed inside the bracket (1), the upper end of the heat collecting tube (3) extending through and into the water storage bucket (2) and fixed therein, and the lower end of the heat collecting tube (3) being fixed to the bracket (1), characterized in that: Side frames (4) are provided on both sides of the heat collecting tube (3), the side frames (4) are fixed to the bracket (1), a shielding mechanism (7) is provided between the side frames (4) on both sides, and the heat collecting tube (3) is located inside the shielding mechanism (7), a driving motor (51) is fixed at one end of the water storage bucket (2) and at a position corresponding to one side of the side frame (4), the driving motor (51) is connected to the shielding mechanism (7) in a transmission manner, and the shielding mechanism (7) can be driven by the driving motor (51) to adjust the shielding of the heat collecting tube (3), thereby reducing the probability of burst damage to the heat collecting tube (3); The shielding mechanism (7) comprises a rotation groove (72) provided on adjacent surfaces of the side frames (4) on both sides; the interior of the rotation groove (72) is rotatably connected to a driving column (71); the output end of the driving motor (51) passes through the side frame (4) and extends to the interior of the rotation groove (72) and is fixedly connected to the upper end of the driving column (71); the outer surfaces of the driving columns (71) on both sides are wrapped with shielding belts (74); and the heat collecting tube (3) is located inside the shielding belts (74); The lower end of the rotating groove (72) is open, and the lower end of the side frame (4) is bolted to a sealing plate (73), the sealing plate (73) closes the lower end opening of the rotating groove (72), and a cleaning assembly (75) is also provided inside the side frame (4); The shielding strip (74) is composed of a reflective sunshade film (741) and a transparent rubber layer (742), the connection between the two being fixed by Velcro, and the two having the same volume, wherein a heat insulation layer (743) is glued and fixed to the lower end surface of the reflective sunshade film (741), the heat insulation layer (743) is composed of graphene-modified rubber, and a bubble-shaped capsule (744) is arranged inside the heat insulation layer (743); The cleaning assembly (75) comprises a liquid storage tank (753) symmetrically opened with the rotating tank (72) as the center, the liquid storage tank (753) is filled with cleaning liquid, one end of the liquid storage tank (753) is slidably connected to a cleaning cotton plate (752), one end of the cleaning cotton plate (752) is in a T-shaped structure matching the liquid storage tank (753), and the other end is in an arc-shaped structure designed to fit on the shielding belt (74) wrapped around the outer surface of the driving column (71); The cleaning assembly (75) further comprises cleaning paddles (751) symmetrically mounted at the opening of the rotating groove (72), wherein the two cleaning paddles (751) are arranged obliquely relative to each other and the adjacent ends thereof are in contact with the shielding belt (74).

2. A solar heat collecting tube according to claim 1, characterized in that: A transmission structure is arranged at the upper ends of the two side frames (4), and an oscillation mechanism (6) is arranged in the middle of the transmission structure.

3. A solar heat collecting tube according to claim 2, characterized in that: The transmission structure comprises a transmission wheel fixed to the upper extension portion of the driving column (71) inside the two side frames (4), and the two transmission wheels are connected by a belt (5) wound around them.

4. A solar heat collecting tube according to claim 2, characterized in that: The oscillating mechanism (6) comprises a driving wheel (62) rotatably connected to the middle part of the front end face of the water storage barrel (2) via a rotating shaft, the front end of the driving wheel (62) is fixedly connected to a rotating disk (61), the front end face of the rotating disk (61) is designed with a conical structure, and is symmetrically provided with sliding grooves (66), the interior of the sliding groove (66) is slidably connected to a slider (63), a spring (65) is provided between the lower side of the slider (63) and the bottom of the sliding groove (66), the front end faces of the sliders (63) are both rotatably connected to rotating shafts (64), and the two rotating shafts (64) are both located inside the shielding belt (74).

5. A solar heat collecting tube according to claim 4, characterized in that: The slider (63) and the slide groove (66) are in a T-shaped structure and match each other and cannot be separated, and the rotating shaft (64) is made of ceramic material.

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