Distributed photovoltaic panel mounting and fixing support

Abstract

The invention discloses a distributed photovoltaic panel mounting and fixing support, and relates to the technical field of photovoltaic panel mounting, the distributed photovoltaic panel mounting and fixing support comprises a support body, the support body is provided with a processing mechanism, the processing mechanism comprises two mounting seats, a placement hole, a first gear and a rectangular hole, and the interior of the placement hole is rotatably connected with a round rod through a first bearing. According to the distributed photovoltaic panel mounting and fixing support, by arranging the processing mechanism, the distributed photovoltaic panel mounting and fixing support can have the function of processing dust accumulated on the surface of a photovoltaic panel, and therefore the situation that particulate matter such as dust falling on the surface of the photovoltaic panel disturbs the transmission path of solar rays is reduced, and the transmission efficiency of the solar rays is improved. The distributed photovoltaic panel mounting and fixing support solves the problem that part of light cannot normally enter a photovoltaic panel for photovoltaic conversion, so that the power generation efficiency of the photovoltaic panel is reduced, the use effect of the distributed photovoltaic panel mounting and fixing support is improved, and meanwhile the use efficiency of the distributed photovoltaic panel mounting and fixing support is also improved.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic panel installation, and in particular to a distributed photovoltaic panel installation and fixing bracket. Background Art

[0002] Distributed photovoltaic panels refer to photovoltaic conversion facilities used in distributed power grids, which can convert solar energy into electricity to meet local needs. Since photovoltaic panels are usually installed in outdoor environments, they are easily affected by external forces such as wind. In order to prevent the photovoltaic panels from being blown down or shifted, which may cause damage to them, people generally use fixed brackets to firmly install the photovoltaic panels on the roof of a building, the ground or other structures.

[0003] When in use, the existing distributed photovoltaic panel mounting and fixing bracket can allow the photovoltaic panel to track the horizontal position of the sun in real time and rotate, so that the photovoltaic panel can receive sunlight to the greatest extent throughout the day, thereby improving the power generation efficiency of the photovoltaic panel. However, it does not have the function of processing dust accumulated on the surface of the photovoltaic panel. That is, since photovoltaic panels are usually installed outdoors, and the outdoor atmosphere contains particles such as dust and sand, these particles will gradually fall on the surface of the photovoltaic panel during the natural sedimentation process. At this time, the dust and other particles falling on the surface of the photovoltaic panel will disrupt the propagation path of sunlight, so that some light cannot normally enter the photovoltaic panel for photoelectric conversion, thereby reducing the power generation efficiency of the photovoltaic panel. As the dust accumulation time increases and the thickness increases, this impact will become more and more serious, which not only reduces the use effect of the distributed photovoltaic panel mounting and fixing bracket, but also reduces the use efficiency of the distributed photovoltaic panel mounting and fixing bracket.

[0004] Therefore, we propose a distributed photovoltaic panel installation and fixing bracket to solve the problems raised in the above background technology. Summary of the Invention

[0005] The purpose of the present invention is to provide a distributed photovoltaic panel mounting and fixing bracket to solve the problem that the existing distributed photovoltaic panel mounting and fixing bracket does not have the function of processing dust accumulated on the surface of the photovoltaic panel. That is, since photovoltaic panels are usually installed outdoors, and the outdoor atmosphere contains particles such as dust and sand, these particles will gradually fall on the surface of the photovoltaic panel during natural sedimentation. At this time, the dust and other particles falling on the surface of the photovoltaic panel will disrupt the propagation path of sunlight, so that some light cannot normally enter the photovoltaic panel for photoelectric conversion, thereby reducing the power generation efficiency of the photovoltaic panel. As the dust accumulation time increases and the thickness increases, this impact will become more and more serious, which not only reduces the use effect of the distributed photovoltaic panel mounting and fixing bracket, but also reduces the use efficiency of the distributed photovoltaic panel mounting and fixing bracket.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a distributed photovoltaic panel mounting and fixing bracket, comprising a bracket body, wherein the bracket body is provided with a processing mechanism; The processing mechanism includes two mounting seats, a placement hole, a first gear and a rectangular hole. A shell is fixed between the outer surfaces of the two mounting seats. A round rod is rotatably connected to the inside of the placement hole through a first bearing. A second gear is fixedly sleeved on the outer surface of the round rod. Both air inlet ends of the shell are equipped with one-way valves, the top of the round rod is equipped with fan blades, the top of the shell is equipped with a shell cover, the inside of the rectangular hole is fixed with a nozzle, and the air outlet end of the shell cover is equipped with a hose.

[0007] Preferably, the top end of the round rod movably passes through the bottom of the shell, the fan blades are located inside the shell, the air inlet end of the nozzle is installed with the air outlet end of the hose, and the teeth of the first gear are meshed with the teeth of the second gear.

[0008] Preferably, the bracket body includes a mounting frame, a cylindrical hole is formed on the top of the mounting frame, and a connecting rod is rotatably connected to the inside of the cylindrical hole through a second bearing.

[0009] Preferably, a motor is mounted on the lower side of the mounting frame, and a rectangular plate is fixed to the top end of the connecting rod.

[0010] Preferably, a T-shaped groove is provided on one side of the rectangular plate, a drainage hole is provided on the inner wall of the T-shaped groove, a controller is installed on the lower side of the mounting frame, and a cylindrical block is fixed on one side of the rectangular plate.

[0011] Preferably, the outer surface of the cylindrical block is rotatably connected to a rotating plate via a third bearing, a hand-tightened bolt is threaded through one side of the rotating plate, and a rectangular block is fixed to the surface of the rectangular plate.

[0012] Preferably, a sun position sensor is installed on the surface of the rectangular block, the output end of the motor is installed with the bottom end of the connecting rod, and the motor is electrically connected to the controller.

[0013] Preferably, the threaded end of the hand-tightening bolt is threadedly connected to one side of the rectangular plate, the sun position sensor is electrically connected to the controller, and the placement hole is opened at the top of the mounting frame.

[0014] Preferably, the bottoms of the two mounting seats are mounted on the top of the mounting bracket, the rectangular hole is opened on the inner wall of the T-shaped slot, and the first gear is fixedly sleeved on the outer surface of the connecting rod.

[0015] Preferably, the interior of the T-shaped groove is slidably connected to a photovoltaic panel body, and one side of the photovoltaic panel body is in contact with the other side of the rotating plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a processing mechanism to enable the distributed photovoltaic panel mounting and fixing bracket to have the function of processing dust accumulated on the surface of the photovoltaic panel, thereby reducing the occurrence of dust and other particulate matter falling on the surface of the photovoltaic panel that disrupts the propagation path of sunlight, making some light unable to normally enter the photovoltaic panel for photoelectric conversion, thereby reducing the power generation efficiency of the photovoltaic panel. It not only improves the use effect of the distributed photovoltaic panel mounting and fixing bracket, but also improves the use efficiency of the distributed photovoltaic panel mounting and fixing bracket. Through the cooperation of the two mounting seats, the shell and the mounting frame can be fixed together, and through the cooperation of the rotating first gear, the second gear and the first bearing, the round rod can be driven to rotate inside the placement hole.

[0017] 2. The present invention allows the photovoltaic panel to track the horizontal position of the sun in real time and rotate by setting a bracket body, so that the photovoltaic panel can receive sunlight to the maximum extent throughout the day, thereby improving the power generation efficiency of the photovoltaic panel. With the cooperation of the controller, the motor and the second bearing, the connecting rod can be driven to rotate inside the cylindrical hole, and the water accumulated between the T-shaped slot and the photovoltaic panel body can be drained away through the action of the drainage hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of a fixed bracket for mounting a distributed photovoltaic panel according to the present invention; Figure 2 A three-dimensional view of a distributed photovoltaic panel mounting bracket according to the present invention from another angle; Figure 3 This is a structural schematic diagram of a distributed photovoltaic panel installation and fixing bracket according to the present invention; Figure 4 A partial perspective view of a distributed photovoltaic panel mounting bracket according to the present invention; Figure 5 This is a partially cutaway perspective view of a distributed photovoltaic panel mounting bracket according to the present invention; Figure 6 This is another partial perspective view of a distributed photovoltaic panel mounting and fixing bracket according to the present invention; Figure 7 This is a partial three-dimensional diagram of a processing mechanism for a distributed photovoltaic panel installation and fixing bracket according to the present invention; Figure 8 This is a partially cutaway perspective view of a processing mechanism for a distributed photovoltaic panel mounting and fixing bracket according to the present invention; Figure 9 A distributed photovoltaic panel mounting bracket according to the present invention Figure 5 Enlarged stereogram of point A in the middle.

[0019] In the figure: 1. Bracket body; 101. Mounting frame; 102. Cylindrical hole; 103. Connecting rod; 104. Motor; 105. Rectangular plate; 106. T-slot; 107. Drain hole; 108. Controller; 109. Cylindrical block; 110. Turn plate; 111. Tightening bolt; 112. Rectangular block; 113. Sun position sensor; 2. Processing mechanism; 201. Mounting seat; 202. Shell; 203. Placement hole; 204. First gear; 205. Round rod; 206. Second gear; 207. One-way valve; 208. Fan blade; 209. Shell cover; 210. Rectangular hole; 211. Nozzle; 212. Hose; 3. Photovoltaic panel body. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] See also Figures 1-9 As shown, the present invention provides a technical solution: a distributed photovoltaic panel installation and fixing bracket, comprising a bracket body 1, on which a processing mechanism 2 is provided; The processing mechanism 2 includes two mounting seats 201, a placement hole 203, a first gear 204 and a rectangular hole 210. A shell 202 is fixed between the outer surfaces of the two mounting seats 201. The inside of the placement hole 203 is rotatably connected to a round rod 205 through a first bearing. The outer surface of the round rod 205 is fixedly sleeved with a second gear 206. Both air inlet ends of the shell 202 are equipped with a one-way valve 207, the top of the round rod 205 is equipped with a fan blade 208, the top of the shell 202 is equipped with a shell cover 209, the inside of the rectangular hole 210 is fixed with a nozzle 211, and the air outlet end of the shell cover 209 is equipped with a hose 212.

[0022] according to Figure 2 、 Figure 3 、 Figure 5 and Figure 7-Figure 9 As shown, the top end of the round rod 205 is movable through the bottom of the shell 202, the fan blades 208 are inside the shell 202, the air inlet end of the nozzle 211 is installed with the air outlet end of the hose 212, and the teeth of the first gear 204 are engaged with the teeth of the second gear 206, so that the fan blades 208 can be driven to rotate with the cooperation of the rotating second gear 206, the first bearing, the placement hole 203 and the round rod 205.

[0023] according to Figure 1-Figure 4As shown, the bracket body 1 includes a mounting frame 101, and a cylindrical hole 102 is opened on the top of the mounting frame 101. The interior of the cylindrical hole 102 is rotatably connected to a connecting rod 103 through a second bearing. The connecting rod 103 can be driven to rotate under the cooperation of the started motor 104, the cylindrical hole 102 and the second bearing.

[0024] according to Figures 1-6 and Figure 9 As shown, a motor 104 is installed on the lower side of the mounting frame 101, and a rectangular plate 105 is fixed to the top of the connecting rod 103, so that the sun position sensor 113 can be driven to rotate with the cooperation of the rotating connecting rod 103, the rectangular block 112 and the rectangular plate 105.

[0025] according to Figures 1-6 and Figure 9 As shown, a T-shaped slot 106 is provided on one side of the rectangular plate 105, a drainage hole 107 is provided on the inner wall of the T-shaped slot 106, a controller 108 is installed on the lower side of the mounting frame 101, and a cylindrical block 109 is fixed on one side of the rectangular plate 105. The photovoltaic panel body 3 can be fixed inside the T-shaped slot 106 with the cooperation of the cylindrical block 109, the third bearing, the rotating plate 110, the rectangular plate 105 and the hand-tightening bolts 111.

[0026] according to Figure 1-Figure 3 、 Figure 5 、 Figure 6 and Figure 9 As shown, the outer surface of the cylindrical block 109 is rotatably connected to a rotating plate 110 through a third bearing, and a hand-tightened bolt 111 is threaded through one side of the rotating plate 110. A rectangular block 112 is fixed to the surface of the rectangular plate 105, which can provide an installation position for the sun position sensor 113 under the action of the rectangular block 112.

[0027] according to Figure 1-Figure 3 As shown, a sun position sensor 113 is installed on the surface of the rectangular block 112, the output end of the motor 104 is installed with the bottom end of the connecting rod 103, and the motor 104 is electrically connected to the controller 108. With the cooperation of the controller 108, the second bearing and the motor 104, the connecting rod 103 can be driven to rotate inside the cylindrical hole 102.

[0028] according to Figures 1-6 and Figure 9 As shown, the threaded end of the hand-tightening bolt 111 is threadedly connected to one side of the rectangular plate 105, the sun position sensor 113 is electrically connected to the controller 108, and the placement hole 203 is opened at the top of the mounting frame 101, which is convenient for providing an installation position for the motor 104 under the action of the mounting frame 101.

[0029] according to Figure 1-Figure 4 、 Figure 6 、 Figure 7 and Figure 9 As shown, the bottoms of the two mounting seats 201 are mounted on the top of the mounting frame 101, the rectangular hole 210 is opened on the inner wall of the T-shaped slot 106, and the first gear 204 is fixedly sleeved on the outer surface of the connecting rod 103. The round rod 205 can be driven to rotate with the cooperation of the rotating connecting rod 103, the second gear 206, the placement hole 203, the first bearing and the first gear 204.

[0030] according to Figure 1-Figure 3 、 Figure 5 、 Figure 6 and Figure 9 As shown, the photovoltaic panel body 3 is slidably connected inside the T-slot 106, and one side of the photovoltaic panel body 3 is in contact with the other side of the rotating plate 110, so that the photovoltaic panel body 3 can be prevented from automatically moving out of the inside of the T-slot 106 with the cooperation of the rotating plate 110, the hand-tightening bolt 111, the third bearing, the rectangular plate 105 and the cylindrical block 109.

[0031] The effect achieved by the entire mechanism is as follows: when it is necessary to use the distributed photovoltaic panel, all components are first moved to the appropriate position of the building by using the cooperation of the mounting frame 101, and then the mounting frame 101 is installed with the building, and then the controller 108 is connected to the external power supply, and then the hand-tightening bolt 111 is removed, and then the cylindrical block 109 is used as the rotation axis to rotate the rotating plate 110 90 degrees. When the rotating plate 110 completes the rotation operation, the photovoltaic panel body 3 is first moved to the inside of the T-shaped slot 106 until it can no longer move, and then the rotating plate 110 is reset to the shifted position, and then the hand-tightening bolt 111 is reset to the shifted position. When the photovoltaic panel body 3 completes the installation operation (such as Figure 1In the state shown, and the detection end of the sun position sensor 113 is facing the sun), the controller 108 is first used to start the sun position sensor 113. The started sun position sensor 113 will continuously detect the change of the sun's position (solar azimuth) and transmit the detected position change information to the controller 108 in the form of an electrical signal. The controller 108 will then use the received sun position change information to start the motor 104. The started motor 104 will then drive the connecting rod 103 to rotate inside the cylindrical hole 102 under the cooperation of the second bearing, and the rotating connecting rod 103 will drive the rectangular plate 105 and the first gear 204 to rotate together. At the same time, the rotating first gear 204 will rotate on the second gear 206. , the placement hole 203, the first bearing and the round rod 205 cooperate to drive the fan blade 208 to rotate (at this time, the rotation speed of the fan blade 208 is slow and its ventilation capacity is weak), and the rotating rectangular plate 105 will drive the sun position sensor 113 to rotate with the cooperation of the rectangular block 112. At the same time, the rotating rectangular plate 105 will also drive the photovoltaic panel body 3 to rotate with the cooperation of the T-slot 106, the cylindrical block 109, the third bearing, the rotating plate 110 and the hand-tightening bolt 111, so that the surface of the photovoltaic panel body 3 can always face the sun, thereby improving the power generation efficiency of the photovoltaic panel body 3. When the sun sets, the controller 108 will turn off the motor 104 and the sun position sensor 113. At this time, the turned-off motor 104 will With the cooperation of the above-mentioned components, the photovoltaic panel body 3 stops rotating. When the sun rises, the controller 108 will first start the motor 104. At this time, the started motor 104 will drive the connecting rod 103 to reset and rotate in cooperation with the second bearing and the cylindrical hole 102. At this time, the connecting rod 103 that is performing reset rotation will drive the first gear 204 and the rectangular plate 105 to reset and rotate together. The reset rotating rectangular plate 105 will drive the photovoltaic panel body 3 and the sun position sensor 113 to reset and rotate together with the cooperation of the above-mentioned components. At the same time, the rotating first gear 204 will drive the second gear 206 to rotate, and the rotating second gear 206 will drive the round rod 205 to rotate in cooperation with the placement hole 203 and the first bearing. The rotating round rod 205 will drive the fan blades 208 to rotate. At this time, the rotating fan blades 208 will, with the cooperation of the two one-way valves 207, suck the air in the environment into the interior of the shell 202, and then, with the cooperation of the shell cover 209 and the hose 212, transport it to the interior of the nozzle 211, and then, with the cooperation of the nozzle 211 and the rectangular hole 210, be sprayed onto the surface of the photovoltaic panel body 3, so that the dust falling on the surface of the photovoltaic panel body 3 can be blown away, thereby improving the subsequent power generation efficiency of the photovoltaic panel body 3. When the photovoltaic panel body 3 is reset to its original position, the controller 108 will directly turn off the motor 104, and then the controller 108 will start the sun position sensor 113, and then the above-mentioned operation steps can be followed.The surface of the photovoltaic panel body 3 is always facing the sun, thereby improving the power generation efficiency of the photovoltaic panel body 3.

[0032] Among them, the first bearing, the second bearing and the third bearing are all common parts in real life.

[0033] The photovoltaic panel body 3 is a distributed photovoltaic panel, and is generally composed of the following parts: Photovoltaic cells: The core components of photovoltaic panels, their function is to convert sunlight energy directly into electrical energy. Common photovoltaic cells include monocrystalline silicon, polycrystalline silicon and thin-film cells. Monocrystalline silicon photovoltaic cells have a higher conversion efficiency. Their silicon wafers are cut from monocrystalline silicon rods, and the cell surface color is darker and more uniform. Polycrystalline silicon photovoltaic cells have a slightly lower conversion efficiency. They are composed of multiple silicon grains, and the cell surface is light blue and mottled. Thin-film cells include cadmium telluride, copper indium gallium selenide, etc., which are very thin and have a lower conversion efficiency.

[0034] Packaging materials: The main function is to protect photovoltaic cells from the influence of the external environment, such as moisture, oxygen, mechanical impact, etc. Commonly used packaging materials are ethylene-vinyl acetate copolymer and polyvinyl fluoride. Ethylene-vinyl acetate copolymer has good adhesion and light transmittance, and can tightly bond photovoltaic cells to the glass cover and backplane; polyvinyl fluoride is mainly used for the backplane of photovoltaic panels. It has excellent weather resistance and anti-aging properties, and can effectively prevent the back of the photovoltaic panel from being eroded.

[0035] Glass cover: Located on the outermost layer of the photovoltaic panel, its function is to protect the internal photovoltaic cells and packaging materials while allowing as much sunlight as possible to pass through. Low-iron tempered glass is generally used.

[0036] Backsheet: Located on the back of the photovoltaic panel, its main function is to prevent water vapor from entering the interior of the photovoltaic panel, while providing certain electrical insulation and mechanical support. There are many options for backsheet materials, such as polyvinyl fluoride, polyvinylidene fluoride and other composite materials.

[0037] Frame: Used to fix and protect the edge of the photovoltaic panel. The frame material is generally aluminum alloy.

[0038] Junction box: It is the connection hub between the internal circuit of the photovoltaic panel and the external circuit.

[0039] The working principle of the sun position sensor 113 is as follows: it usually divides a circular or square photosensitive element (such as a photoresistor or photocell) into four quadrants. When the sun's rays shine vertically, the light energy received by the four quadrants is basically the same. When the sun's position shifts, the light energy received by different quadrants will be different. The direction and angle of the sun's shift are determined by comparing the light energy difference of the four quadrants.

[0040] Among them, the controller 108 (PLC controller), the sun position sensor 113 and the motor 104 are all existing technologies, and their working principles are all public technologies. Their models can be selected according to actual conditions and will not be explained in detail here.

[0041] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A distributed photovoltaic panel mounting bracket, characterized by: It comprises a bracket body (1), wherein a processing mechanism (2) is provided on the bracket body (1); The processing mechanism (2) comprises two mounting seats (201), a placement hole (203), a first gear (204) and a rectangular hole (210); a shell (202) is fixed between the outer surfaces of the two mounting seats (201); a round rod (205) is rotatably connected to the interior of the placement hole (203) via a first bearing; a second gear (206) is fixedly sleeved on the outer surface of the round rod (205); one-way valves (207) are installed at both air inlet ends of the shell (202); a fan blade (208) is installed at the top end of the round rod (205); a shell cover (209) is installed at the top of the shell (202); a nozzle (211) is fixed inside the rectangular hole (210); and a hose (212) is installed at the air outlet end of the shell cover (209).

2. The distributed photovoltaic panel mounting bracket according to claim 1, characterized in that: The top end of the round rod (205) is movable through the bottom of the shell (202), the fan blade (208) is located inside the shell (202), the air inlet end of the nozzle (211) is installed with the air outlet end of the hose (212), and the teeth of the first gear (204) are meshed with the teeth of the second gear (206).

3. The distributed photovoltaic panel mounting bracket according to claim 1, characterized in that: The bracket body (1) comprises a mounting frame (101), a cylindrical hole (102) is provided at the top of the mounting frame (101), and a connecting rod (103) is rotatably connected to the inside of the cylindrical hole (102) via a second bearing.

4. The distributed photovoltaic panel mounting bracket according to claim 3, characterized in that: A motor (104) is installed on the lower side of the mounting frame (101), and a rectangular plate (105) is fixed to the top end of the connecting rod (103).

5. The distributed photovoltaic panel mounting and fixing bracket according to claim 4, characterized in that: A T-shaped slot (106) is provided on one side of the rectangular plate (105), a drainage hole (107) is provided on the inner wall of the T-shaped slot (106), a controller (108) is installed on the lower side of the mounting frame (101), and a cylindrical block (109) is fixed on one side of the rectangular plate (105).

6. The distributed photovoltaic panel mounting and fixing bracket according to claim 5, characterized in that: The outer surface of the cylindrical block (109) is rotatably connected to a rotating plate (110) via a third bearing. A hand-tightened bolt (111) is threaded through one side of the rotating plate (110). A rectangular block (112) is fixed to the surface of the rectangular plate (105).

7. The distributed photovoltaic panel mounting and fixing bracket according to claim 6, characterized in that: A sun position sensor (113) is installed on the surface of the rectangular block (112), the output end of the motor (104) is installed with the bottom end of the connecting rod (103), and the motor (104) is electrically connected to the controller (108).

8. The distributed photovoltaic panel mounting and fixing bracket according to claim 7, characterized in that: The threaded end of the hand-tightening bolt (111) is threadedly connected to one side of the rectangular plate (105), the sun position sensor (113) is electrically connected to the controller (108), and the placement hole (203) is opened on the top of the mounting frame (101).

9. The distributed photovoltaic panel mounting and fixing bracket according to claim 4, characterized in that: The bottoms of the two mounting seats (201) are mounted on the top of the mounting frame (101), the rectangular hole (210) is opened on the inner wall of the T-shaped slot (106), and the first gear (204) is fixedly sleeved on the outer surface of the connecting rod (103).

10. The distributed photovoltaic panel mounting and fixing bracket according to claim 6, characterized in that: The inside of the T-shaped groove (106) is slidably connected to a photovoltaic panel body (3), and one side of the photovoltaic panel body (3) is in contact with the other side of the rotating plate (110).

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