CN104259121A - Ash removing device for photovoltaic module - Google Patents

Abstract

A cleaning device for a photovoltaic module, comprising an upper bracket, a lower bracket, a left support rod and a right support rod; the upper bracket, the left support rod, the lower bracket and the right support rod are sequentially fixedly connected to form a rectangular frame; the left support rod and the right There is a cleaning brush parallel to it between the support rods; a cleaning brush motor for driving the cleaning brush to rotate axially is provided on the lower bracket; an upper driving driving wheel and a lower driving wheel are respectively arranged under the horizontal plane of the upper bracket and the lower bracket. Travel driving wheel, and the upper traveling motor that drives the upper traveling driving wheel to rotate and the lower traveling motor that drives the lower traveling driving wheel to rotate; a solar panel is arranged above the upper bracket, and the solar panel is used to provide power for the cleaning brush motor, Upper travel motor and lower travel motor. The solar panel is used to provide power to all the motors, so that the dust removal device rotates the dust removal brush while moving along the side frame of the photovoltaic module to achieve a green and environmentally friendly dust removal effect.

Description

Dedusting device for photovoltaic modules

technical field

The invention relates to a dust removal device, in particular to a dust removal device for a photovoltaic module. the

the

Background technique

Photovoltaic power generation is based on the principle of photovoltaic effect, using solar cells to directly convert sunlight into electrical energy. The key component of this technology is solar cells. Multiple solar cells are packaged and protected in series to form large-area solar cells. Modules, but the solar cell modules used in photovoltaic power plants are installed obliquely and exposed to the air for a long time, which is very easy to cause dust on the surface of the modules, which has seriously affected the power generation efficiency of the modules. When the amount of ash accumulation reaches a certain level, the power generation efficiency drops by even more than 8%. For a 100MWp large-scale ground photovoltaic power station, which is expected to generate 600,000 kWh per day, it will lose 48,000 kWh/day due to ash accumulation. If the approved on-grid electricity price is 1 The daily loss of the power station will be 48,000 yuan. the

In response to this problem, the current photovoltaic power station operating unit adopts various methods to clean up the dust on the surface of the module. Mainly as follows:

1. Manual cleaning. Due to the shortage of land resources in developed coastal areas and the concentration of areas with good lighting conditions in Northwest China provinces and cities, current large-scale photovoltaic power plants are often built in sparsely populated barren slopes, deserts, and Gobi. Large quantities of manpower are not readily available in such areas. For a 100MWp photovoltaic power station, more than 400,000 pieces of 250Wp photovoltaic modules need to be installed; considering that a pair of brackets is equipped with multiple modules, the plane area is large, and there is a certain inclination during installation. The height of the top is often higher than 2.5 meters, and the dust on the top is not easy to manually Clean up; the surface of the module is not cleaned uniformly, and the hot spot effect caused by it will cause greater damage to the photovoltaic cells.

2. Water flushing: large water consumption; access to clean water is limited (the drought in Northwest China is severe, and access to groundwater is restricted by national policies); tap water costs are high. In the cold season, the method of washing with water is used. The ice formed on the surface of the module is not only difficult to melt in a short time, but also the interference of the ice on the light will reduce the use of solar energy by the module. The remaining ice may even form spots on the surface of the photovoltaic module, which is also easy to produce hot spot effect. Spraying water on the surface of components has high requirements on the waterproof level of electrical equipment installed on site. There is a one-time installation fee and maintenance fee for laying water pipes; there is the same site limitation problem for transporting water by car and the following "cleaning dust on vehicle machinery and equipment"

3. Cleaning of vehicle-mounted machinery and equipment: equipment costs are high, and ordinary vehicles cannot pass through desert and hillside conditions; sites that can be barely transported have certain requirements for the size of the road and the strength of the roadbed; if there are vegetation, sprinkler irrigation systems, underground Directly buried cables, cable bridges laid in the air, overhead lines, and incoming and outgoing vehicles will all affect them; water on the road after rain and hard snow on the road will make it difficult for vehicles to pass. The distance between the moving vehicle and the components on the bracket needs to be precisely controlled. For the same photovoltaic power station, the distance between the two is likely to be erratic due to the undulations of the terrain, and the quality of dust removal cannot be guaranteed.

4. Do not clean, wait for the rainy and snowy weather, and clean the surface of the module naturally: the weather conditions are unpredictable, and the rainfall in the northwest region itself is small. For example, in the Zhongwei area of Ningxia, where the light conditions are good, the average rainfall for many years is only 120mm; the snow season is more concentrated In winter, the ash accumulation of the other 3 seasons cannot be swept away by snow. the

Contents of the invention

The technical problem to be solved by the present invention is to provide a dust-cleaning device for a photovoltaic module powered by solar energy in view of the above-mentioned deficiencies in the prior art. the

In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is: a kind of cleaning device, comprising upper support, lower support, left support rod and right support rod; upper support, left support rod, lower support and right support rod fixedly connected to form a rectangular frame;

A cleaning brush parallel to the left support rod and the right support rod is provided, and the two ends of the cleaning brush are respectively connected with the upper bracket and the lower bracket;

The lower bracket is provided with a cleaning brush motor for driving the cleaning brush to rotate axially;

An upper traveling driving wheel and a lower traveling driving wheel are respectively arranged under the horizontal plane of the upper bracket and the lower supporting bracket, and an upper traveling motor driving the rotation of the upper traveling driving wheel and a lower traveling motor driving the rotation of the lower traveling driving wheel;

On the lower facade of the upper bracket and the lower bracket, there are respectively an upper traveling driving wheel and a lower traveling driving wheel, and the upper traveling driving wheel and the lower traveling driving wheel respectively drive the upper traveling driving wheel and the lower traveling driving wheel synchronously through the synchronous belt. Rotate to drive the dust removal device to move in a direction perpendicular to the axis of the dust removal brush;

A solar panel is arranged above the upper bracket, and the solar panel is arranged in parallel with the dust cleaning brush. One end of the solar panel is connected with the upper bracket, and support wheels are installed on the lower surface of the solar panel, and the solar panel is used to provide power for cleaning Ash brush motor, upper travel motor, lower travel motor, electric control box, vacuum cleaner and hoist motor. The solar panel is used to provide power to all the motors, so that the dust removal device rotates the dust removal brush while moving along the frame of the photovoltaic module to achieve a green and environmentally friendly dust removal effect.

As a further improved technical solution of the present invention, the upper bracket and the lower bracket are also provided with an electric control box, the solar panel provides power to the electric control box, and the electric control box is used to control the cleaning brush motor, the upper The start and stop, rotation direction and speed of the traveling motor and the lower traveling motor, as well as the start and stop of the vacuum cleaner, the start and stop of the lifting motor, forward and reverse. The effect of automatic control of dust removal is achieved. the

As a further improved technical solution of the present invention, an upper pressure wheel that is in contact with the surface of the photovoltaic module is provided on the side of the upper facade of the upper bracket facing the lower bracket, and a side of the upper facade of the lower bracket facing the upper bracket is provided with a The lower pressure roller in contact with the surface of the photovoltaic module. The upper and lower pressure wheels leave a certain height between the dust removal device and the surface of the photovoltaic module, so that the dust removal brush has free rotation space. the

As a further improved technical solution of the present invention, the number of the upper pressure rollers is at least 4, and the number of the lower pressure rollers is at least 4. The weight of the cleaning device can be evenly distributed on the frame of the photovoltaic module. the

As a further improved technical solution of the present invention, the upper pressure wheel and the lower pressure wheel use elastic rubber wheels. Protect photovoltaic modules. the

As a further improved technical solution of the present invention, the number of the upper traveling driving wheels is at least 4, and the number of the lower traveling driving wheels is at least 4. The driving force of the cleaning device can be evenly distributed. the

As a further improved technical solution of the present invention, the upper traveling driving wheel and the lower traveling driving wheel adopt elastic rubber wheels to protect the photovoltaic module. the

As a further improved technical solution of the present invention, a spring pressure regulator is provided on the lower facade of the upper bracket and the outer side of the lower bracket lower facade, and the spring pressure regulator passes through the lower facade of the upper bracket and the inner side of the lower bracket lower facade. The springs are respectively connected with the upper traveling driving wheel 2 and the lower traveling driving wheel located at both ends of the lower facade of the upper support, and the spring pressure regulator adjusts the pressure of the upper traveling driving wheel 2 and the lower traveling driving wheel on the side frame of the photovoltaic module through the spring. When the dust cleaning device crosses different components, the upper and lower driving wheel surfaces are always pressed against the side of the photovoltaic module, which will not cause the basic driving force to be lost due to the suspension of the driving wheel during the movement of the dust cleaning equipment, and has certain site adaptability . the

As a further improved technical solution of the present invention, the synchronous belt that drives the upper bracket drive wheel and the lower bracket drive wheel to rotate synchronously, and the timing belt tension adjustment wheel pass through the inner side of the upper bracket lower facade and the lower bracket lower facade. The spring is connected with the lower surface of the upper bracket and the outer side of the lower bracket with a spring pressure regulator; on the synchronous belt that drives the driving wheel of the upper bracket and the driving wheel of the upper bracket to rotate synchronously and drives the driving wheel of the lower bracket and the driving wheel of the lower bracket Synchronously rotating synchronous belts are provided with synchronous belt anti-slip devices. The synchronous belt is pressed tightly by the synchronous belt tension adjustment wheel, so that when the upper and lower driving wheels are displaced, the synchronous belt connected to it is not easy to slip, and it is also the compensation for the tension of the synchronous belt. The synchronous belt anti-slip device is to prevent the synchronous belt from slipping from the connected synchronous wheel when it is working. the

As a further improved technical solution of the present invention, a positioning arm is provided at both ends of the upper bracket and the lower bracket, the positioning arm is composed of a positioning arm branch one and a positioning arm branch two, and the positioning arm branch one and the positioning arm branch two are connected to each other. Set vertically, the positioning arm branch 1 and the positioning arm branch 2 are respectively connected to the bracket 1 and the bracket 2, and the bracket 1 is provided with the positioning wheel 1 and the lifting motor 1 that pulls the positioning wheel 1 and moves up and down along the direction perpendicular to the surface of the photovoltaic module , the bracket 2 is provided with the positioning wheel 2 and the lifting motor 2 that pulls the positioning wheel 2 to move up and down along the vertical direction with the side of the photovoltaic module, the solar cell provides power to the lifting motor 1 and the lifting motor 2, and the electric control box is used for Control the start-stop, positive and negative rotation of the first lifting motor and the second lifting motor, a belt is provided on the inner side of the second branch of the positioning arm, and belt support wheels are arranged at both ends of the belt. The design of the positioning arm achieves the effect that the cleaning device can smoothly cross the adjacent brackets with large height or angle differences when it is moving, so as to clean the next group of photovoltaic modules, and it is suitable for a wide range of sites. the

As a further improved technical solution of the present invention, a balance bar is provided on the lower facade of the upper bracket, and the other end of the balance bar is a free end. It is not only convenient for the staff to move the dust removal device during maintenance, but also makes the dust removal device more firmly pressed on the surface of the photovoltaic module by controlling the weight of the installation on the balance bar. the

As a further improved technical solution of the present invention, a vacuum cleaner is installed on the balance bar, and the vacuum cleaner is connected to the dust collection cover covering the surface of the cleaning brush through a suction pipe, and the electric control box is used to control the start and stop of the vacuum cleaner . The dust on the cleaning brush is sucked away by the vacuum cleaner, and the dust cover also prevents the cleaning brush from being excessively eroded by rainwater. the

As a further improved technical solution of the present invention, the dust-cleaning brush includes a dust-cleaning brush rod and a dust-cleaning brush bristle. The effect that the cleaning brush is convenient for disassembly and maintenance is achieved. the

Compared with the prior art, the ash removal device for photovoltaic modules of the present invention is not limited to the site, manpower supply conditions, water source, and ambient temperature, and uses solar energy to provide power to clean the surface of photovoltaic modules. the

the

Description of drawings

Figure 1 Schematic diagram of the cleaning device. the

Figure 2 Schematic diagram of the structure of the cleaning device. the

Figure 3 is a schematic diagram of the structure of the upper bracket in the cleaning device. the

Figure 4 Schematic diagram of the connection between the upper travel drive wheel, the synchronous belt and the upper travel drive wheel in the upper bracket. the

Figure 5 is a schematic diagram of the structure of the lower bracket in the cleaning device. the

Figure 6 Schematic diagram of the connection between the lower driving wheel, the lower synchronous belt and the lower driving wheel in the lower bracket. the

Figure 7 Schematic diagram of the contact between the upper pressure wheel and the surface of the photovoltaic module. the

Figure 8 is a schematic diagram of the upper travel drive wheel with springs in the upper bracket. the

Figure 9 is a schematic diagram of the lower traveling drive wheel with springs in the lower bracket. the

Figure 10 Schematic diagram of the synchronous belt tensioning adjustment wheel on the synchronous belt in the upper and lower brackets. the

Figure 11 is a schematic diagram of the synchronous belt tension adjustment wheel in Figure 9 and the upper travel drive wheel in Figure 7. the

Figure 12 The synchronous belt anti-slip device on the synchronous belt in the upper and lower brackets. the

Figure 13 is a sectional view of the upper travel drive wheel in Figure 7 and the synchronous belt tension adjustment wheel in Figure 9 and the synchronous belt anti-skid device in Figure 11. the

Figure 14 Schematic diagram of the lift arm structure. the

Figure 15 Schematic diagram of the contact between the lifting arm and the photovoltaic module. the

The structure diagram of Fig. 16 dust suction hood and cleaning brush. the

Figure 17 is a cross-sectional view of the dust hood. the

The structural representation of Fig. 18 cleaning brush. the

the

The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

the

Detailed ways

Example 1

Referring to Figures 1 to 6, in this embodiment, a cleaning device includes an upper bracket 1, a lower bracket 2, a left support rod 3 and a right support rod 4; an upper bracket 1, a left support rod 3, and a lower bracket 2 and the right support rod 4 are sequentially fixedly connected to form a rectangular frame;

Between the left support rod 3 and the right support rod 4, there is a cleaning brush 5 parallel to it, and the two ends of the cleaning brush 5 are respectively connected with the upper support 1 and the lower support 2;

The lower bracket 2 is provided with a cleaning brush motor 6 for driving the cleaning brush 5 to rotate axially;

Under the upper bracket horizontal plane 02 and the lower bracket horizontal plane 04, there are respectively an upper travel driving wheel 31 and a lower travel driving wheel 17, and an upper travel motor 28 that drives the upper travel driving wheel 31 to rotate and a lower travel that drives the lower travel driving wheel 17 to rotate. Motor 10;

On the upper bracket lower facade 03 and the lower bracket lower facade 06, an upper travel driving wheel 32 and a lower travel driving wheel 18 are respectively arranged, and the upper travel driving wheel 31 and the lower travel driving wheel 17 respectively drive the upper travel drive through the synchronous belt 52. The wheel 32 and the lower driving wheel 18 rotate synchronously to drive the cleaning device to move in a direction perpendicular to the axis of the cleaning brush 5;

Above the upper support is provided with a solar panel 12, the solar panel 12 is arranged in parallel with the cleaning brush 5, and one end of the solar panel 5 is connected with the upper support 1, and the lower surface of the solar panel 12 is equipped with a supporting wheel 13, and the solar panel The plate 12 is used to provide power to the cleaning brush motor 6 , the upper travel motor 28 , and the lower travel motor 10 .

Install the dust removal device on the surface of the photovoltaic module: the upper bracket 1 and the lower bracket 2 of the dust removal device are respectively in contact with the upper and lower frames of the photovoltaic module, the support wheel 13 is in contact with the surface of the photovoltaic module, the upper driving wheel 32, the lower walking The drive wheel 18 is in contact with the side frame of the photovoltaic module. Under sufficient sunlight, the 24~30V DC voltage generated by the upper bracket solar panel 12 provides power to the cleaning brush motor 6, the upper travel motor 28, and the lower travel motor 10. , the cleaning brush motor 6 drives the cleaning brush 5 to rotate, and the upper traveling motor 28 and the lower traveling motor 10 drive the upper traveling driving wheel 31 and the lower traveling driving wheel 17 to rotate respectively, and the upper traveling driving wheel 31 and the lower traveling driving wheel 17 pass through respectively The synchronous belt 52 drives the upper travel driving wheel 32 and the lower travel driving wheel 18 to rotate and advance, so that the dust removal device travels along the frame of the photovoltaic module, that is, perpendicular to the axis of the dust removal brush, and is formed by two dust removal brushes. It moves in the direction parallel to the plane, while turning to clean the dust, achieving the effect of green and environmental protection. the

As shown in Figure 6, an electric control box 9 is also provided on the upper support 1 and the lower support 2, and the electric control box 9 is used to control the start and stop of the cleaning brush motor 6, the upper travel motor 28 and the lower travel motor 10. , direction of rotation and speed of rotation. Automatically control the dust cleaning device in different working states, the motor load is used alternately, and the power supply of the same power drives multiple loads. The surface of the electric control box 9 is equipped with forward, reverse, and stop three-position switches of all motors, and the interior is equipped with up and down travel motors and dust cleaning brush motor speed control boards to adjust the speed of the motors, and the PLC controller completes the automatic control function. The control of the motor can be conveniently selected by manual or automatic mode; the cleaning brush motor drives the two cleaning brushes to rotate in opposite directions. This design reduces the resistance of the cleaning device when it moves forward on the surface of the photovoltaic module, and at the same time, the cleaning efficiency is higher. high. the

On the side of the upper bracket upper facade 01 facing the lower bracket 2, an upper pressure wheel 27 that is in contact with the surface of the photovoltaic module is provided. The lower pressure roller 16. The upper and lower pressure wheels leave a certain height between the dust removal device and the surface of the photovoltaic module, so that the dust removal brush has free space to rotate. the

The number of the upper pressing rollers 27 is at least four, and the number of the lower pressing rollers 16 is at least four. The weight of the cleaning device can be evenly distributed on the frame of the photovoltaic module. The outer diameter of the wheel is selected to be greater than a certain size of the gap between the component and the component sheet, and the thickness of the wheel is selected so that the device will not fall off from the frame of the component when it moves obliquely upward or downward. the

The upper pressing wheel 27 and the lower pressing wheel 16 adopt elastic rubber wheels to protect the surface of the photovoltaic module. the

The number of the upper traveling driving wheels 32 is at least four, and the number of the lower traveling driving wheels 18 is at least four. The driving force of the cleaning device can be evenly distributed. The upper travel motor and the lower travel motor respectively drive the upper bracket drive wheel and the lower bracket drive wheel to rotate along the side frame of the photovoltaic module, and drive the cleaning device to travel along the surface of the photovoltaic module. Using a synchronous belt, a single motor can drive more The driving wheel can reduce the load on the solar panel 12 and also reduce the unnecessary weight of the device. The selection of the diameter of the drive wheel is greater than a certain size of the gap between the component and the component sheet, and the thickness of the wheel is suitable for not falling off the side frame of the component when the device is up and down. the

The upper traveling driving wheel 32 and the lower traveling driving wheel 18 adopt elastic rubber wheels to protect the surface of the photovoltaic module. the

As shown in Figure 7 and Figure 8, a spring pressure regulator 38 is provided outside the lower facade 03 of the upper bracket and the lower facade 06 of the lower bracket, and the spring pressure regulator 38 passes through the lower facade 03 of the upper bracket and the lower surface of the lower bracket. The spring 36 provided on the inner side of the facade 06 is respectively connected with the upper travel driving wheel 32 and the lower travel driving wheel 18 located at both ends of the lower facade 03 of the upper bracket, and the spring pressure regulator 38 is pre-adjusted by the spring 36 and is located on the lower facade 03 of the upper bracket. The pressure of the upper traveling driving wheel 32 and the lower traveling driving wheel 18 at both ends on the side frame of the photovoltaic module. The spring pressure regulator 38 pre-regulates the pressure of the upper traveling driving wheel 32 and the lower traveling driving wheel 18 located at both ends of the lower facade 03 of the upper support through the spring 36 when contacting the photovoltaic module. The components installed on the same group of brackets have height deviations, and the height and inclination angle of adjacent brackets have deviations. The wheel surface will not be suspended in the air and cannot touch the side of the photovoltaic module, which ensures that the wheel surface of a sufficient number of upper and lower driving wheels is always pressed against the side of the photovoltaic module, and will not cause the cleaning equipment to lose its basic driving force. Site adaptability. In short, it is to consider the installation deviation of components on the same bracket and different brackets. Through spring adjustment, too many wheels will not fall into the air and the device will not stay in place, which is also an adaptation to the installation deviation. the

On the synchronous belt 52 that drives the upper support drive wheel 32 and the lower support drive wheel 18 to rotate synchronously, a synchronous belt tension adjustment wheel 39 is provided, and the synchronous belt tension adjustment wheel 39 passes through the upper support lower facade 03 and the lower The spring 36 provided on the inner side of the lower bracket 06 is connected with the spring pressure regulator 38 on the lower side of the upper bracket 03 and the outer side of the lower bracket 06; driving the upper bracket driving wheel 31 and the upper bracket driving wheel 32 to rotate synchronously Synchronous belt anti-skid device 53 is all provided with on the synchronous belt 52 of drive lower support driving wheel 17 and the synchronous belt 52 of lower support driving wheel 18 synchronous rotations. When the springs of the upper and lower driving wheels with springs are deformed, the synchronous belts connected to them become loose and easily slip off, and the synchronous belts are compressed by the tension adjustment wheel, and the tension of the synchronous belts is also compensated. The synchronous belt anti-slip device 53 is to prevent the synchronous belt from slipping off from the synchronous wheel when it is working. the

As shown in Figure 14, positioning arm 14 is arranged at both ends of described upper support 1 and lower support 2, and positioning arm 14 is made up of positioning arm branch one 110 and positioning arm branch two 111, positioning arm branch one 110 and positioning arm branch one 110 and positioning arm branch two 111. Two arm branches 111 are mutually vertically arranged, and positioning arm branch one 110 is connected with support one 112 and support two 113 with positioning arm branch two 111 respectively, is provided with positioning wheel one 45 on support one 112 and pulls positioning wheel one 45 along with The lifting motor 1 47 that moves up and down in the direction perpendicular to the surface of the photovoltaic module, the positioning wheel 2 46 on the bracket 113 and the lifting motor 2 48 that pulls the positioning wheel 46 and moves up and down in the direction perpendicular to the side of the photovoltaic module. The battery 12 provides power to the first lifting motor 47 and the second lifting motor 48, and the electric control box 9 is used to control the start and stop, forward and reverse rotation of the lifting motor one 47 and the second lifting motor 48. In the positioning arm branch two 111 A belt 49 is provided on the side facing the photovoltaic module, and belt support wheels 50 are provided at both ends of the belt 49 . The first positioning wheel is in contact with the front surface of the photovoltaic module, and the second positioning wheel is in contact with the side frame of the photovoltaic module. The lifting motor pulls the positioning wheel through the ball screw to move up and down or away from the side frame of the module. The design of the positioning arm achieves the effect that the cleaning device can smoothly cross the adjacent brackets with large height or angle differences when it is moving, so as to clean the next group of photovoltaic modules, and it is suitable for a wide range of sites. A belt 49 is provided on the inner side of the two 111 branches of the positioning arm, and belt bracket wheels 50 are arranged at both ends of the belt 49 to reduce the impact force of the component metal frame and the positioning arm. the

The installation of photovoltaic power station components, according to the national standard GB50794 5.3.2: the installation tilt angle of photovoltaic modules is allowed to be ±1°, the edge height difference between adjacent photovoltaic modules is ≤2mm, and the edge height difference between the same group of photovoltaic modules is ≤5mm. However, this article is not a mandatory specification, and it is often not followed during the construction process. At the same time, the photovoltaic power station covers a large area (a 100MWp large-scale ground photovoltaic power station covers an area of nearly 4,000 mu, and more than 10,000 sets of supports are designed), and the installation of modules often changes according to the flatness of the terrain. Of course, most power stations have "big deviations in inclination angle and height" which account for only 10% of the total. The function of the positioning arm is to overcome the 10% deviation, improve the utilization rate of the device as much as possible, and minimize the workload of the operating personnel during the automatic dust removal process. Even in the case of a large deviation, it is not a big workload to group the photovoltaic modules cleaned by the cleaning device reasonably, or to adjust the installation deviation of the module brackets, so that the photovoltaic factory area is suitable for the application of automation equipment. the

Self-cleaning of the cleaning brush and automatic stop of the device after work: the PLC device installed in the electric control box 9 judges whether the cleaning device is crossing two sets of supports according to the signal transmitted by the proximity switch on the lifting arm 14; the cumulative number of pieces cleaned According to this quantity, it is judged which self-cleaning method is required for the cleaning brush, and the control of the cleaning device is completed;

When crossing the adjacent brackets, judge whether to start the lifting motor according to the signal transmitted by the proximity switch on the lifting arm: if the deviation of the height or inclination angle of the adjacent two groups of brackets is within the normal range, the lifting motor will not start, and the travel motor and cleaning brush motor will Continuous operation; if the value transmitted by a proximity switch to the PLC is less than the set value, the lifting motor is started, and the lifting motor drives the positioning wheel in branch 1 of the positioning arm that is in contact with the surface of the photovoltaic module through the ball screw to continuously approach the surface of the module and support it. The positioning wheel, which is in contact with the side of the photovoltaic module on the surface of the module or in the branch of the positioning arm 2, is close to the side frame of the module and supported on the side frame, and then raises the lifting arm to drive the upper bracket or the lower bracket to lift to a smooth crossing height; When the lifting motor is working, the dust cleaning brush motor, the up and down travel motor, and the vacuum cleaner all stop; after the lifting motor drives the upper and lower brackets to a suitable height, the lifting motor stops, and the walking motor starts, driving the dust cleaning device to span to the adjacent bracket. The proximity switch judging device on the lower bracket is completed, the traveling motor stops, the lifting motor reverses, and the positioning wheel is brought back to the initial position. After the positioning wheel returns to the initial position, the lifting motor stops, the travel motor and the cleaning brush motor start, and continue to clean the photovoltaic modules on the next set of brackets.

The spanning process of the device is as follows: when the cleaning device is working, if the positioning arm is close to the switch, the distance is small, the cleaning brush and the walking motor stop, and the lifting motor on the corresponding positioning arm is started (in principle, it is first judged that the branch of the positioning arm is approaching) Switching distance, after judging the positioning arm branch 2 is close to the switching distance), during this process, the positioning wheel is supported on the surface or side of the component, and the upper and lower brackets are lifted to a suitable position through the positioning arm. After the position is adjusted, the hoist is stopped. The walking motor starts, and the proximity switch on the bracket judges that the crossing is successful. After the crossing is successful, the traveling motor and the cleaning brush motor stop, and the hoist reverses to bring the positioning wheel to the initial position. After the positioning wheel reaches the initial position, the hoist stops, the travel motor and the cleaning brush motor start, and continue to clean the next set of bracket components; if the positioning arm proximity switch does not have a small distance, then directly continue to clean the next set of bracket components. the

As shown in the figure, a balance bar 15 is also provided on the lower facade of the upper bracket, and the other end of the balance bar 15 is a free end. The vacuum cleaner 11 is installed on the balance bar 15, and the vacuum cleaner 11 is connected with the dust collection cover 25 wrapping the surface of the cleaning brush 5 through a suction pipe, and the electric control box 9 is used to control the start and stop of the vacuum cleaner 11. the

The purpose of setting the balance bar is: First, the height of the installation of the components is relatively high, and maintenance personnel cannot touch the upper bracket without tools. When the dust removal device breaks down, one of the two maintenance personnel moves the lower bracket, and the other uses the balance bar, and the two maintenance personnel can easily move the dust removal device. Secondly, the vacuum cleaner installed on the balance pole has a certain weight, which can press the cleaning device more firmly on the surface of the photovoltaic module. Relying on the gravity of the dust removal device, the dust removal device will not jump when the dust removal brush is working. the

As shown in the figure, the dust removal brush 5 includes a dust removal brush rod 51 and a dust removal brush bristle 52, and the bristles have a zipper structure for easy installation and disassembly. the

Self-cleaning of the cleaning brush: After brushing a certain number of components, the cleaning brush will accumulate a certain amount of dust. In order to improve the efficiency of the dust removal brush, the self-cleaning of the dust removal brush is fully considered in the design of the device: if it is slightly dirty, the dust removal device is in the neutral position of the two sets of brackets, the travel motor stops, and the dust removal brush motor drives the dust removal brush to run idly After a certain number of turns, the dust will be shaken off; if it is severely dirty, the traveling motor and the lifting motor will stop at the gap between the two sets of brackets, and the dust cleaning brush motor will keep rotating, start the vacuum cleaner, and suck the dust online. The running time of the vacuum cleaner is set in the PLC device. When the running time is up, the vacuum cleaner stops working, the walking motor starts, and the cleaning brush motor keeps rotating to continue cleaning the dust on the surface of the photovoltaic module. When it is too dirty to continue to use, the bristles of the cleaning brush are fixed on the inner lining of the cleaning brush through a zipper, which can be easily disassembled. The bristles are made of materials that can be reused after cleaning, so as to achieve the environmental protection of materials. the

The invention can provide power to all the motors through the solar panels, achieving the effect of cleaning dust in an environment-friendly way; and is equipped with an electric control box to control the start and stop, rotation direction and speed of the motor, achieving the cleaning effect of automatic control; For the unavoidable height and angle deviation of photovoltaic modules on the same bracket or different brackets, through the deflection of the support rod of the device, the driving wheel with spring or the lifting arm, different photovoltaic modules can be successfully spanned, and the site applicability is strong. the

Claims (10)

1. A dust removal device for photovoltaic modules, characterized in that: Including upper support (1), lower support (2), left support bar (3) and right support bar (4); upper support (1), left support bar (3), lower support (2) and right support bar ( 4) Fixed and connected in turn to form a rectangular frame; Between the left support rod (3) and the right support rod (4), there is a cleaning brush (5) parallel to it, and the two ends of the cleaning brush (5) are connected with the upper bracket (1) and the lower bracket (2) respectively. connect; The lower bracket (2) is provided with a cleaning brush motor (6) for driving the cleaning brush (3) to rotate axially; Under the horizontal plane of the upper bracket (02) and the horizontal plane of the lower bracket (04), there are respectively an upper traveling driving wheel (31) and a lower traveling driving wheel (17), and an upper traveling motor (28) for driving the upper traveling driving wheel (31) to rotate ) and the lower traveling motor (10) that drives the lower traveling driving wheel (17) to rotate; On the lower surface of the upper bracket (03) and the lower surface of the lower bracket (06), there are respectively an upper travel drive wheel (32) and a lower travel drive wheel (18), an upper travel driving wheel (31) and a lower travel driving wheel (17) Drive the upper driving wheel (32) and the lower driving wheel (18) to rotate synchronously through the synchronous belt (52), so as to drive the dust removal device to move in a direction perpendicular to the axial direction of the dust removal brush (5); A solar panel (12) is arranged above the upper bracket (1), and the solar panel (12) is arranged in parallel with the cleaning brush (5). One end of the solar panel (12) is connected with the upper bracket (1), and the solar panel Support wheels (13) are installed on the lower surface of the plate (12), and the solar panel (12) is used to provide power to the cleaning brush motor (6), the upper travel motor (28), and the lower travel motor (10). 2. The dust cleaning device for photovoltaic modules according to claim 1, characterized in that: an electric control box (9) is also provided on the upper support (1) and the lower support (2), and the solar energy The battery board (12) provides power to the electric control box (9), and the electric control box (9) is used to control the start, stop and rotation of the cleaning brush motor (6), the upper travel motor (28), and the lower travel motor (10) direction and speed of rotation. 3. The dust cleaning device for photovoltaic modules according to claim 1 or 2, characterized in that: on the side of the upper support facade (01) facing the lower support (2), there is an upper The pressure wheel (27), the lower pressure wheel (16) in contact with the surface of the photovoltaic module is provided on the side of the upper support (1) of the lower bracket upper facade (04). 4. The dust cleaning device for photovoltaic modules according to claim 3, characterized in that: the number of the upper pressure rollers (27) is at least 4, the number of the lower pressure rollers (16) is at least 4, and the number of the The upper pinch wheel (27) and the lower pinch wheel (16) adopt elastic rubber wheels. 5. The dust cleaning device for photovoltaic modules according to claim 1 or 2, characterized in that: the number of the upper driving wheels (32) is at least 4, and the number of the lower driving wheels (18) is at least 4 , the described upper travel drive wheel (32) and the lower travel drive wheel (18) adopt elastic rubber wheels. 6. The dust cleaning device for photovoltaic modules according to claim 5, characterized in that spring pressure regulators (38) are provided on the outer sides of the upper support lower facade (03) and the lower support lower facade (06), The spring pressure regulator (38) passes through the upper support lower facade (03) and the spring (36) provided on the inner side of the lower support lower facade (06) respectively and the upper travel drive located at the two ends of the upper support lower facade (03) The wheel (32) is connected with the lower travel drive wheel (18), and the spring pressure regulator (38) adjusts the upper travel drive wheel (32) and the lower travel drive wheel at both ends of the lower facade (03) of the upper bracket through the spring (36). (18) Pressure on the side frame of the photovoltaic module. 7. The dust cleaning device for photovoltaic modules according to claim 1 or 6, characterized in that: the synchronous belt (52) that drives the upper bracket drive wheel (32) and the lower bracket drive wheel (18) to rotate synchronously Timing belt tensioning adjustment wheel (39) is arranged on the top, the synchronous belt tensioning adjustment wheel (39) is provided with the spring (36) and The lower surface of the upper bracket (03) and the outer side of the lower bracket (06) are connected by a spring pressure regulator (38); when driving the upper bracket driving wheel (31) and the upper bracket driving wheel (32) to rotate synchronously, A synchronous belt anti-slip device (53) is provided on the belt (52) and on the synchronous belt (52) that drives the lower support driving wheel (17) and the lower support drive wheel (18) to rotate synchronously. 8. The cleaning device for photovoltaic modules according to claim 2, characterized in that: positioning arms (14) are provided at both ends of the upper support (1) and the lower support (2), and the positioning arms (14 ) is composed of positioning arm branch 1 (110) and positioning arm branch 2 (111). The positioning arm branch 1 (110) and positioning arm branch 2 (111) are arranged perpendicular to each other. (111) are respectively connected with bracket one (112) and bracket two (113), on bracket one (112) there is positioning wheel one (45) and pulling positioning wheel one (45) along the direction perpendicular to the surface of the photovoltaic module The first lifting motor (47) that moves up and down, the second positioning wheel (46) on the bracket two (113) and the lifting motor (48) that pulls the second positioning wheel (46) and moves up and down along the vertical direction to the side of the photovoltaic module, The solar battery (12) provides power to the lifting motor one (47) and the lifting motor two (48), and the electric control box (9) is used to control the start and stop of the lifting motor one (47) and the lifting motor two (48), For forward and reverse rotation, a belt (49) is provided on the side of the positioning arm branch two (111) facing the photovoltaic module, and belt bracket wheels (50) are provided at both ends of the belt (49). 9. The cleaning device for photovoltaic modules according to claim 1 or 2, characterized in that: a balance bar (15) is provided on the lower facade (03) of the upper bracket, and the other end of the balance bar (15) is a free end , a vacuum cleaner (11) is installed on the balance bar (15), and the vacuum cleaner (11) is connected with the dust suction cover (25) wrapping the surface of the cleaning brush (5) through a suction pipe (26), and the The electric control box (9) is used to control the start and stop of the vacuum cleaner (11). 10. The dust removal device for photovoltaic modules according to claim 1 or 2, characterized in that the dust removal brush (5) comprises a dust removal brush rod (51) and dust removal brush bristles (52).