Multi-stage snow sweeping device suitable for photovoltaic panel cleaning

Abstract

The invention relates to the technical field of new energy photovoltaic equipment, in particular to a multi-stage snow sweeping device. The snow sweeping device mainly comprises a plurality of fixed supporting plates which are sequentially arranged and connected to the photovoltaic cleaning robot, and each fixed supporting plate is correspondingly provided with a transmission wheel set and a snow sweeping toothed belt connected to the outer side of the transmission wheel set in a sleeving mode. The transmission wheel set comprises a driving wheel and a driven wheel; the projections of the adjacent snow sweeping toothed belts in the length direction of the photovoltaic cleaning robot have an overlapping interval. The device is combined with the existing photovoltaic cleaning robot, and the snow sweeping work can be completed by adopting a simple snow sweeping structure. The device has super-strong expansibility and is suitable for photovoltaic panel arrays with various width specifications; and the simple snow sweeping structure can meet the requirement for sweeping completeness, meanwhile, shielding on the surface of the photovoltaic panel is minimized, and the adverse effect of snow sweeping work on the light utilization rate of the photovoltaic panel array is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy photovoltaic equipment, and in particular to a multi-stage snow-clearing device. Background Art

[0002] With the deepening application of photovoltaic power generation technology in many application scenarios, how to achieve self-cleaning of photovoltaic panels has become a key research issue for technicians. In large-scale photovoltaic power stations, in order to increase power generation, multiple independent photovoltaic panels are arranged together to form a photovoltaic panel array. In an open-air photovoltaic power field, a large number of operation and maintenance personnel are required to clean the photovoltaic panel array to ensure that the panel surface is not blocked and obtain the highest solar energy utilization rate.

[0003] In order to reduce the waste of human resources and improve the cleaning efficiency of photovoltaic panel arrays, photovoltaic cleaning robots are used in the prior art to clean photovoltaic panel arrays. Traditional photovoltaic panel cleaning robots use an integrated roller brush to clean all types of deposited dirt on the panel surface, but because different dirt has different adhesion, and the shape and number of objects are also different, the integrated roller brush cannot be well applied to all types of dirt cleaning work. Especially in snowy scenes in northern winter, rapid snowfall will cause snow to quickly cover the entire panel surface of the photovoltaic panel array, causing the array to completely lose its photovoltaic power generation capacity. Therefore, researchers have invented a photovoltaic cleaning robot specifically for snow removal to perform operations.

[0004] For example, the Chinese patent document with the publication number CN107795074A discloses a multi-roller brush roof photovoltaic panel snow removal robot and a snow removal method, wherein the photovoltaic panel snow removal robot includes a walking body, a snow sweeping guide plate, a snow sweeping roller brush and a snow discharge conveyor belt; multiple snow sweeping roller brushes rotate along the traveling direction of the walking body, sweep the snow onto the snow sweeping guide plate, and finally place it on the snow discharge conveyor belt at the rear to discharge it, completing the snow removal work. In the above invention, the entire snow removal structure is relatively complex, with many parts, which makes the scalability of the device poor. One of the devices can only be applied to a photovoltaic panel array of a fixed width. If it is to be used on photovoltaic panel arrays of other specifications or sizes, the number of snow sweeping roller brushes, the extension length of the snow sweeping guide plate and the snow discharge conveyor belt must be completely changed, and the scope of application is narrow; and in the above invention, in order to ensure the completeness of snow removal, a plurality of snow sweeping roller brushes staggered along the forward direction are specially set, which causes a large shielding of the photovoltaic panel surface. In the long-term snow removal work, the utilization rate of the photovoltaic panel array to sunlight will be cumulatively reduced, resulting in energy waste. Summary of the invention

[0005] The purpose of the present invention is to provide a multi-stage snow-clearing device suitable for cleaning photovoltaic panels. The device is combined with an existing photovoltaic cleaning robot and can complete the snow-clearing work with a simple snow-clearing structure. It has super scalability and is suitable for photovoltaic panel arrays of various widths and specifications; and the simple snow-clearing structure can minimize the occlusion of the photovoltaic panel surface while ensuring the completeness of the cleaning, thereby avoiding the adverse effects of snow-clearing work on the light utilization rate of the photovoltaic panel array.

[0006] In order to achieve the above object, the specific technical solutions adopted by the present invention are as follows: A multi-stage snow-clearing device suitable for cleaning photovoltaic panels, characterized in that it comprises a plurality of fixed support plates arranged in sequence and connected to a photovoltaic cleaning robot, each of the fixed support plates being provided with a corresponding set of transmission wheel groups and a snow-clearing toothed belt sleeved on the outer side of the transmission wheel group; the transmission wheel group comprises a driving wheel and a passive wheel; and there is an overlapping area between the projections of adjacent snow-clearing toothed belts in the length direction of the photovoltaic cleaning robot.

[0007] Therefore, the multi-stage snow-clearing device suitable for photovoltaic panel cleaning can be installed as a special snow-clearing module on a photovoltaic cleaning robot, driven by the photovoltaic cleaning robot, and performs horizontal snow-clearing operations on the photovoltaic panel array along the forward direction of the photovoltaic cleaning robot.

[0008] This device adopts a split modular design, with multiple fixed support plates arranged in sequence and installed on the photovoltaic cleaning robot through bolts and other fixings. Since the number and arrangement of photovoltaic panels contained in different photovoltaic arrays are different, the lateral width of the photovoltaic array is not uniform. The existing photovoltaic cleaning robot can adjust its width according to the lateral width of the photovoltaic array. This device realizes the multi-level and modularization of the snow removal device by increasing or decreasing the number of multiple fixed support plates arranged in sequence.

[0009] Specifically, each fixed support plate is provided with a transmission wheel set and a snow-sweeping toothed belt sleeved on the outside of the transmission wheel set. The function of the transmission wheel set is to drive the snow-sweeping toothed belt to rotate in a specified direction. The snow-sweeping toothed belt is made of elastic material and contacts the surface of the photovoltaic panel. A plurality of snow-sweeping strips are arranged on it at intervals. When the snow-sweeping strips rotate, they continuously move relative to the surface of the photovoltaic panel to remove the snow on the surface of the photovoltaic panel.

[0010] The transmission wheel group includes a driving wheel and a passive wheel. The driving wheel is driven by a power element such as a motor to provide power for the rotation of the snow-clearing toothed belt; the passive wheel has no power and mainly plays a supporting and tensioning role.

[0011] The projections of adjacent snow-clearing tooth belts in the length direction of the photovoltaic cleaning robot have overlapping areas, so that each snow-clearing tooth belt forms a partial superposition state of the cleaning range in the forward direction of the photovoltaic cleaning robot. At this time, the cleaning range of the entire device will form a continuous whole, and the range width is equal to the combined length of multiple fixed support plates, ensuring that no cleaning will be missed within this length.

[0012] In summary, in the present invention, by designing the fixed support plates arranged in sequence and connected to the photovoltaic cleaning robot and the transmission wheel group and snow-clearing toothed belt thereon, the number and snow-clearing range of multiple split modular snow-clearing units in the width direction of the photovoltaic panel array are combined and spliced; when facing photovoltaic panel arrays of different specifications or widths, flexible modification can be achieved by simply adding or reducing the number of fixed support plates, and the structure is simple, which greatly improves the applicability of the device. The snow-clearing toothed belts on the combined multiple fixed support plates can clean the snow on the photovoltaic panel array without leaving any omissions, and the device uses a simple snow-clearing toothed belt structure without introducing any large-volume roller brushes and conveyor belts. The device's snow-clearing robot has a smaller protruding position in the forward direction, which is beneficial to reducing the shielding area of ​​the photovoltaic array when the device is working, and improving the solar energy utilization rate of the photovoltaic array.

[0013] As a preferred embodiment of the present invention, the fixed support plate includes a main board for providing a mounting position for the transmission wheel set and a sub-board connected to one side of the main board for connecting the main board to the photovoltaic cleaning robot.

[0014] Therefore, the main board is used to provide an installation position for the transmission wheel group, and multiple main boards are connected head to tail in the length direction; the sub-board can be connected to the main board vertically or at an angle, and the sub-board is connected to the side of the photovoltaic cleaning robot in the forward direction using a surface fixing method.

[0015] As a preferred embodiment of the present invention, the passive wheel includes two supporting wheels, a plurality of fixed tensioning wheels and a plurality of movable tensioning wheels installed between the supporting wheels.

[0016] Therefore, the two supporting wheels are mainly arranged at the two end positions in the length direction of the main board, and are used to support the entire snow-clearing toothed belt so that the snow-clearing toothed belt will not fall off during operation; a plurality of fixed tensioning wheels are arranged between the two supporting wheels, which are mainly used to tighten the snow-clearing toothed belt so that it has a stronger driving force when sweeping snow; a plurality of movable tensioning wheels are also arranged, which have a certain movable space and can appropriately help adjust the tension of the snow-clearing toothed belt to avoid the snow-clearing toothed belt from falling off or breaking due to the strong snow sweeping force when the device encounters mixed ice and snow snow blocks.

[0017] As a preferred embodiment of the present invention, the snow-clearing toothed belt supports the fixed tensioning wheel on one side to form a first snow-clearing surface; the snow-clearing toothed belt supports the movable tensioning wheel on one side to form a second snow-clearing surface; there is a functional gap between the first snow-clearing surface and the second snow-clearing surface.

[0018] In this way, the entire snow-clearing toothed belt can have two snow-clearing surfaces in the forward direction of the photovoltaic cleaning robot, and there is a functional gap between the first snow-clearing surface and the second snow-clearing surface, which can not only avoid the collision and entanglement of the front and rear belt bodies, but also add an extra snow-clearing action for cleaner cleaning.

[0019] As a preferred embodiment of the present invention, the two support wheels are respectively installed at both ends of the main board along the length direction; and one of the support wheels in the transmission wheel set on the main board at a non-head position is installed on an adjacent main board.

[0020] Therefore, one of the support wheels in the transmission wheel group on the main board at a non-head position is installed on an adjacent main board, so that the projections of adjacent snow-clearing tooth belts in the length direction of the photovoltaic cleaning robot can have overlapping areas, thereby ensuring that there are no snow-clearing blind spots or missed gaps in the forward direction of the photovoltaic cleaning robot, and it can be cleaned up in one go.

[0021] As a preferred embodiment of the present invention, the connection angle between the main board and the sub-board is less than 90°.

[0022] Therefore, because the auxiliary panel surface is fixed to the side of the photovoltaic cleaning robot's forward direction, the connection angle between the main board and the auxiliary panel is less than 90°, which can create an angle between the main board and the photovoltaic panel surface, allowing the snow-clearing toothed belt to better contact the photovoltaic panel surface, and a snow-removing space can be left between the main board and the auxiliary panel, which also facilitates the operation of sensors and mechanical travel devices when the photovoltaic cleaning robot moves forward.

[0023] As a preferred embodiment of the present invention, a movable groove for installing the movable tension wheel is opened on the main board; and an elastic part is arranged between the movable tension wheel and the sub-board.

[0024] Therefore, the movable tension wheel is installed in the movable groove and can perform axial displacement activities to a certain extent, and an elastic part is provided between the movable tension wheel and the sub-plate, which can help the movable tension wheel to move and also give it the ability of self-recovery.

[0025] As a preferred embodiment of the present invention, the elastic part is one or more of a metal spring, an air spring or a rubber elastic block.

[0026] As a preferred embodiment of the present invention, the snow-clearing toothed belt comprises a belt body sleeved on the transmission wheel set and a plurality of snow-clearing strips arranged at intervals and arranged on the belt body.

[0027] As a preferred embodiment of the present invention, the snow-clearing toothed belt is made of a deformable material, and the deformable material is a silicone rubber material, a polyurethane material, a polyester material, or a polyvinyl chloride material.

[0028] In the present invention, the snow-clearing toothed belt is made of a deformable material, and is preferably made of a material that retains a high degree of elasticity in a low-temperature environment. For example, silicone rubber has good low-temperature resistance and can generally still work at -37°C. Through special formulations, such as the introduction of phenyl, its low-temperature resistance can be further improved to -55°C.

[0029] In summary, the present invention has the following beneficial effects: 1. By designing the fixed support plates that are sequentially arranged and connected to the photovoltaic cleaning robot, as well as the transmission wheel set and snow-clearing toothed belt thereon, the number and snow-clearing range of multiple split modular snow-clearing units in the width direction of the photovoltaic panel array are combined and spliced; when facing photovoltaic panel arrays of different specifications or widths, flexible modification can be achieved by simply adding or reducing the number of fixed support plates. The structure is simple, which greatly improves the applicability of the device.

[0030] 2. The snow-clearing toothed belts on the combined multiple fixed support plates can clear the snow on the photovoltaic panel array without leaving any snow behind.

[0031] 3. The device uses a simple snow-clearing toothed belt structure without any large-volume roller brushes and conveyor belts, so that the snow-clearing robot of the device has a smaller protrusion in the forward direction, which is beneficial to reducing the shielding area of ​​the photovoltaic array when the device is working and improving the solar energy utilization rate of the photovoltaic array. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the combination of the multi-stage snow-clearing device and the photovoltaic cleaning robot; Figure 2 A is a schematic diagram of the bottom structure of the multi-stage snow-clearing device; Figure 3 b is a schematic diagram of the bottom structure of the multi-stage snow-clearing device; Figure 4 This is a schematic diagram of the multi-stage snow-clearing device from a perspective along the length direction.

[0033] In the figure: a fixed support plate 1, a main plate 11, a sub-plate 12, a transmission wheel group 2, a driving wheel 21, a passive wheel 22, a support wheel 221, a fixed tensioning wheel 222, a movable tensioning wheel 223, a snow-clearing toothed belt 3, a belt body 31, a snow-clearing strip 32, and an elastic part 4. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Anyone can implement the present disclosure in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0035] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" means that the two are connected to each other and the relative position relationship after the connection remains unchanged. It should be understood that when component A is fixedly connected to component C through component B, changes in the relative position relationship caused by the deformation of component A, component B and component C itself are allowed. "Rotational connection" means that they are connected to each other and can rotate relative to each other after the connection. "Sliding connection" means that they are connected to each other and can slide relative to each other after the connection. Among them, the two components are obtained by an integrated structure through an integrated molding process, which means that in the process of forming one of the two components, the component is connected to the other component, and there is no need to connect the two components together through reprocessing (such as bonding, welding, snap connection, screw connection).

[0036] like Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, four fixed support plates 1 are arranged in sequence, and each fixed support plate 1 includes a main board 11 for providing an installation position for the transmission wheel set 2 and a sub-board 12 connected to one side of the main board 11 for connecting the main board 11 to the photovoltaic cleaning robot. Figure 4 As shown, the connection angle between the main board 11 and the auxiliary board 12 is less than 90°. Because the auxiliary board 12 is fixed to the side of the photovoltaic cleaning robot's forward direction, the connection angle between the main board 11 and the auxiliary board 12 is less than 90°, which can make an angle between the main board 11 and the photovoltaic panel surface, so that the snow-clearing toothed belt 3 can better contact the photovoltaic panel surface, and a snow-removing space can be left between the main board 11 and the auxiliary board 12, which is also convenient for the operation of the sensor and the mechanical travel device when the photovoltaic cleaning robot moves forward.

[0037] Each fixed support plate 1 is provided with a transmission wheel set 2 and a snow-sweeping toothed belt 3 sleeved on the outside of the transmission wheel set 2. The function of the transmission wheel set 2 is to drive the snow-sweeping toothed belt 3 to rotate in a specified direction. The snow-sweeping toothed belt 3 is made of elastic material and contacts the surface of the photovoltaic panel. A plurality of snow-sweeping strips are arranged on the snow-sweeping toothed belt 3 at intervals. When the snow-sweeping strips rotate, the snow-sweeping strips continuously move relative to the surface of the photovoltaic panel to remove the snow on the surface of the photovoltaic panel.

[0038] A set of transmission wheel group 2 includes a driving wheel 21 and multiple passive wheels 22. The driving wheel 21 is driven by a motor to provide power for the snow-clearing toothed belt 3 to rotate; the passive wheel 22 is unpowered and mainly plays a supporting and tensioning role. Figure 2 and Figure 3 As shown, the passive wheel 22 includes two supporting wheels 221, three fixed tensioning wheels 222 installed between the supporting wheels 221, and one movable tensioning wheel 223. The snow-sweeping toothed belt 3 is supported on one side of the fixed tensioning wheel 222 to form a first snow-sweeping surface; the snow-sweeping toothed belt 3 is supported on one side of the movable tensioning wheel 223 to form a second snow-sweeping surface; there is a functional gap between the first snow-sweeping surface and the second snow-sweeping surface. The entire snow-sweeping toothed belt 3 can have two snow-sweeping surfaces in the forward direction of the photovoltaic cleaning robot, and there is a functional gap between the first snow-sweeping surface and the second snow-sweeping surface, which can avoid collision and entanglement of the front and rear belt bodies, and can also add an extra snow-sweeping action to make the cleaning cleaner.

[0039] Two support wheels 221 are respectively installed at both ends of the main board 11 along the length direction; one of the support wheels 221 in a set of transmission wheel groups 2 on any main board 11 in a non-primary position is installed on an adjacent main board 11. One of the support wheels 221 in a set of transmission wheel groups 2 on any main board 11 in a non-primary position is installed on an adjacent main board 11, so that the projections of adjacent snow-sweeping toothed belts 3 in the length direction of the photovoltaic cleaning robot have overlapping areas, thereby ensuring that there is no snow-sweeping blind area or missed sweeping gap in the forward direction of the photovoltaic cleaning robot, and it can be cleaned at one time.

[0040] The main board 11 is provided with an active groove for installing the active tension wheel 223; the active tension wheel 223 is installed in the active groove and can move the axis to a certain extent, and an elastic part 4 is provided between the active tension wheel 223 and the sub-board 12, which can help the active tension wheel 223 to move and also give it the ability to self-recover. The elastic part 4 is one or more of a metal spring, an air spring or a rubber elastic block. In this embodiment, the elastic part 4 is a metal spring, When the device is working, the multiple snow-clearing strips on the snow-clearing toothed belt 3 contact and press against the surface of the photovoltaic panel, and the driving wheels 21 in the transmission wheel group 2 rotate under the drive of the motor, thereby driving the supporting wheels 221, the fixed tensioning wheels 222 and the movable tensioning wheels 223 to rotate. When it moves along the cleaning direction of the photovoltaic panel surface, the snow-clearing toothed belt 3 continuously knocks off the snow on the panel surface. Because the snow-clearing toothed belts 3 on each fixed support plate 1 have overlapping cleaning surfaces, the snow can be cleaned without omission. When it is necessary to clean photovoltaic panels of different widths, it is only necessary to increase the number of fixed support plates 1, transmission wheel groups 2 and snow-clearing toothed belts 3, and splice and install them. The operation is simple and the cost is low.

[0041] In another possible embodiment, the elastic portion 4 may be an air spring or a rubber elastic block; and the snow-clearing toothed belt 3 is made of a deformable material, including but not limited to silicone rubber, polyurethane, polyester, and polyvinyl chloride.

[0042] The above description is only a specific implementation method of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or replacements within the technical scope disclosed in the present application, which should be included in the protection scope of the present application; in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. The structural member materials, sizes, shapes, etc. mentioned in the embodiments of the present application are all schematic descriptions and do not constitute strict or absolute limitations. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A multi-stage snow removal device suitable for cleaning photovoltaic panels, characterized in that: The invention comprises a plurality of fixed support plates (1) arranged in sequence and connected to a photovoltaic cleaning robot, each of the fixed support plates (1) being provided with a set of transmission wheel groups (2) and a snow-clearing toothed belt (3) sleeved on the outside of the transmission wheel groups (2); the transmission wheel groups (2) comprising a driving wheel (21) and a driven wheel (22); and the projections of adjacent snow-clearing toothed belts (3) in the length direction of the photovoltaic cleaning robot have overlapping sections.

2. A multi-stage snow-clearing device suitable for cleaning photovoltaic panels according to claim 1, characterized in that: The fixed support plate (1) comprises a main plate (11) for providing a mounting position for the transmission wheel set (2) and a sub-plate (12) connected to one side of the main plate (11) and used for connecting the main plate (11) to the photovoltaic cleaning robot.

3. A multi-stage snow-clearing device suitable for cleaning photovoltaic panels according to claim 2, characterized in that: The passive wheel (22) comprises two supporting wheels (221), a plurality of fixed tensioning wheels (222) installed between the supporting wheels (221), and a plurality of movable tensioning wheels (223).

4. A multi-stage snow-clearing device suitable for cleaning photovoltaic panels according to claim 3, characterized in that: The snow-clearing toothed belt (3) is supported on one side of the fixed tension wheel (222) to form a first snow-clearing surface; the snow-clearing toothed belt (3) is supported on one side of the movable tension wheel (223) to form a second snow-clearing surface; and a functional gap exists between the first snow-clearing surface and the second snow-clearing surface.

5. A multi-stage snow-clearing device suitable for cleaning photovoltaic panels according to claim 4, characterized in that: The two support wheels (221) are respectively mounted at two ends of the main board (11) along the length direction; one of the support wheels (221) in the transmission wheel set (2) on the main board (11) at a non-head position is mounted on an adjacent main board (11).

6. A multi-stage snow-clearing device suitable for cleaning photovoltaic panels according to claim 2, characterized in that: The connection angle between the main board (11) and the auxiliary board (12) is less than 90°.

7. A multi-stage snow-clearing device suitable for cleaning photovoltaic panels according to claim 5, characterized in that: The main plate (11) is provided with a movable groove for mounting the movable tension wheel (223); an elastic portion (4) is provided between the movable tension wheel (223) and the auxiliary plate (12).

8. A multi-stage snow-clearing device suitable for cleaning photovoltaic panels according to claim 7, characterized in that: The elastic part (4) is one or more of a metal spring, an air spring or a rubber elastic block.

9. A multi-stage snow-clearing device suitable for cleaning photovoltaic panels according to claim 1, characterized in that: The snow-clearing toothed belt (3) comprises a belt body (31) sleeved on the driving wheel set (2) and a plurality of snow-clearing strips (32) arranged at intervals and arranged on the belt body (31).

10. A multi-stage snow-clearing device suitable for cleaning photovoltaic panels according to any one of claims 1 to 9, characterized in that: The snow-sweeping toothed belt (3) is made of a deformable material, and the deformable material is a silicone rubber material, a polyurethane material, a polyester material, or a polyvinyl chloride material.

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