Photovoltaic module transmission system for photovoltaic module laminating machine and photovoltaic module laminating machine

Abstract

The utility model provides a photovoltaic module transmission system for a photovoltaic module laminating machine and the photovoltaic module laminating machine, aiming at overcoming the defect that the length of a transmission belt of the photovoltaic module laminating machine in the prior art needs to meet the requirement of increasing the length when a dragging beam assembly passes through a transmission shaft, so that the transmission belt is loosened and droops. Comprising a conveying belt and a conveying belt transmission system for the photovoltaic module laminating machine, the conveying belt transmission system for the photovoltaic module laminating machine comprises a conveying belt driving device and a conveying belt tension adjusting mechanism, and the conveying belt driving device comprises two parallel transmission chains, a chain transmission driving device, a driving side chain transmission device and a driven side chain transmission device. By adopting the photovoltaic module transmission system for the photovoltaic module laminating machine, the length of the transmission belt can be designed, so that the transmission belt can reach a tightened state, or the transmission belt cannot be contacted with the photovoltaic module of the laminating unit on the lower layer although the transmission belt is not tightened.

Description

TECHNICAL FIELD

[0001] The utility model belongs to photovoltaic module laminating equipment technical field, especially related to a photovoltaic module transmission system for photovoltaic module laminating machine and photovoltaic module laminating machine. BACKGROUND

[0002] The photovoltaic module laminator is a packaging device for photovoltaic modules, which usually includes a laminating section and a cooling section. The laminating section can adopt a one-cavity structure or a two-cavity structure. The laminating section with the one-cavity structure is provided with one laminating cavity, and the laminating and curing of the photovoltaic module are completed in the same laminating cavity. The laminating section with the two-cavity structure is provided with two laminating cavities, the laminating is completed in the first cavity, which is usually referred to as a laminating cavity, and the curing is completed in the second cavity, which is usually referred to as a curing cavity. A photovoltaic module transmission system is needed to transmit the photovoltaic module to the laminating section and the cooling section. One transmission system can be used to drive the photovoltaic module, or the laminating section and the cooling section can be respectively provided with a photovoltaic module transmission system. In the prior art, the photovoltaic module transmission system includes a chain transmission device, a transmission belt, and a drag beam assembly (hereinafter referred to as a drag beam) for dragging the transmission belt. The chain transmission device includes a main transmission shaft, a slave transmission shaft, a chain transmission shaft, and a transmission chain. The laminating section and the cooling section each include a workbench. The main transmission roller and the slave transmission shaft are respectively arranged at the front and rear ends of the workbench. Chain transmission shafts are fixedly arranged on both sides of the main transmission roller and the slave transmission roller. Sprockets are arranged on the chain transmission shafts. The transmission chain is sleeved on the sprockets. The transmission belt usually adopts high-temperature cloth and usually includes multiple pieces of high-temperature cloth. The pieces of high-temperature cloth are fixedly connected by the drag beam to form a ring structure. The end portions of the pieces of high-temperature cloth are arranged along the length direction of the drag beam and are fixedly connected with the drag beam. The two ends of the drag beam are respectively fixedly connected with the transmission chain on the corresponding side, so that the transmission belt is arranged around the main transmission shaft, the slave transmission shaft, and the workbench and runs around them. According to the conventional design theory, the design length of the transmission chain is equal to the sum of the distance between the center lines of the two chain transmission shafts and the diameter of the sprocket multiplied by a certain tension coefficient. The theoretical design length of the transmission belt is equal to the total length of the transmission chain plus the difference between the chain transmission shaft and the transmission roller circumference. However, since the drag beam itself has a certain thickness, when the drag beam passes through the transmission shaft, the transmission belt is separated from the transmission roller under the dragging action of the drag beam. Therefore, the transmission belt with the theoretical design length may be torn when passing through the transmission roller, which has a risk of tearing. Therefore, the length of the transmission belt is usually designed to be longer, which is equal to the theoretical design length of the transmission belt plus the distance between the joint line where the drag beam is connected with the transmission belt and the surface of the transmission roller. Moreover, the length of the transmission chain also changes correspondingly with the change of the transmission load. When the load increases, the transmission chain also increases correspondingly. At this time, the design length of the transmission belt needs to be increased. However, if the increased length is too long, it may cause the transmission belt to wrinkle in the process of laminating the photovoltaic module. This causes the transmission belt to sag when the drag beam does not pass through the transmission roller. Two pieces of high-temperature cloth are usually connected by two drag beams, and the lengths of the two pieces of high-temperature cloth are equal. In one transmission belt circulation process, the drag beam passes through the transmission roller twice. At other times, the transmission belt is in contact with the transmission roller and passes through the transmission roller. Therefore, the sagging of the transmission belt almost accompanies the entire laminating process.Since the transmission chain is correspondingly increased, when the drag beam does not pass through the transmission roller, the transmission chain needs to be tensioned through the chain tensioning wheel or other tensioning device, so that the torque of the chain transmission driving device increases, which can cause the transmission chain to break or the transmission shaft to break.

[0003] In order to improve the laminating efficiency of the photovoltaic module laminator, a multi-layer photovoltaic module laminator appears, each layer laminator is completed by a laminating unit, and cooling is completed by a cooling unit, each laminating unit includes a workbench, a transmission roller and a transmission belt, the transmission roller is arranged on the front and rear sides of the workbench, the transmission belt is arranged around the transmission roller and the workbench, a sprocket is arranged on both sides of the transmission roller, a transmission chain is arranged around the sprocket, the width direction of the transmission belt is fixedly connected with the drag beam assembly, and the two ends of the drag beam assembly are fixedly connected with the corresponding transmission chains, so that the transmission chain can drive the transmission belt to circulate around the workbench and the transmission roller. When the drag beam does not pass through the transmission roller, the transmission belt runs around the transmission roller on both ends, and when the drag beam passes through the transmission roller, the transmission belt is in a half-coated state with the surface of the transmission roller. When the drag beam passes through the transmission roller, the end of the transmission belt is fixed by the drag beam, and a certain distance is required between the drag beam and the transmission roller, so that part of the transmission belt is away from the surface of the transmission roller under the action of the drag beam. Especially when the drag beam passes through the outermost surface of the transmission roller, the radius of the transmission belt around the transmission roller increases to the maximum, which causes the length of the transmission belt required to be inconsistent. When the drag beam passes through the transmission roller, the length of the transmission belt required is long, and when the drag beam does not pass through the transmission roller, the length of the transmission belt required is short. In order to make the drag beam assembly drag the transmission belt to pass through the transmission roller smoothly, the transmission belt needs to be made according to the length of the transmission belt required when the drag beam passes through the transmission roller, so that the transmission belt is more relaxed and droops when the drag beam does not pass through the transmission roller than when the drag beam passes through the transmission roller, or the transmission belt is more relaxed and droops when one drag beam passes through the transmission roller than when two drag beams pass through the transmission roller. Since the distance between the upper and lower layers of the multi-layer photovoltaic module is small, the transmission belt will meet and contact the photovoltaic module arranged on the workbench below and the transmission belt transporting the photovoltaic module, affecting the normal operation of the transmission belt, and also causing the adhesive agent adhered to the upper transmission belt to be wiped onto the surface of the photovoltaic module, resulting in defective products. In addition, the adhesive adhered to the transmission belt will be brought into the next work chamber and form dirt on the surface of the photovoltaic module in a plane shape, resulting in large labor intensity of manual cleaning, high operating cost and poor economic benefit. The transmission belt droops will also cause the photovoltaic module to shift during the process of closing the laminating chamber cover, resulting in dirty surface of the laminated photovoltaic module.In order to solve the sagging problem of the transmission belt and reduce the sagging amount of the transmission belt, the prior art has made attempts, for example, the transmission belt is set according to the length required when the dragging beam does not pass through the transmission roller, a spring or a high-temperature-resistant rubber belt is arranged at the tail end of the transmission belt, and the increase in the length of the transmission belt required when the dragging beam passes through the transmission roller is compensated by connecting the spring or the high-temperature-resistant rubber belt with the pull rod. However, due to the inconsistent pulling force of the multiple springs or high-temperature-resistant rubber belts, problems such as wrinkle and tearing of the high-temperature cloth occur. Since the transmission belt of the upper laminating unit is also the cover cloth of the lower transmission unit, when laminating the battery assembly, the transmission belt of the upper laminating unit covers the surface of the photovoltaic assembly. When the transmission belt is wrinkled, the wrinkles are likely to cause the photovoltaic assembly to explode during the laminating process. In order to solve this problem, the prior art also attempts to increase the opening height, the opening height is changed to 150mm or above, and the pad is added on the tower type support structure to reduce the reserved space at the top. However, these improvements will inevitably reduce the production efficiency and the space utilization rate, and will also lead to the increase of the distance between the opening and closing of the cover, the greater heat loss in the chamber, the increase of the energy consumption of the equipment, and the poor economic benefit. Practical new type content

[0004] The utility model discloses to the length of the transmission belt of the prior art photovoltaic assembly laminating machine needs to meet the need of increasing the length when the dragging beam assembly passes through the transmission shaft, and provides a photovoltaic assembly transmission system for photovoltaic assembly laminating machine and photovoltaic assembly laminating machine.

[0005] The technical scheme for solving the technical problem of the utility model is as follows:

[0006] A photovoltaic module transmission system for a photovoltaic module laminator, comprising a transmission belt, a transmission belt drive system for a photovoltaic module laminator, the transmission belt drive system for a photovoltaic module laminator comprising a transmission belt drive device and a transmission belt tension adjusting mechanism, the transmission belt drive device comprising two parallel transmission chains, a chain drive device, a driving side chain transmission device and a driven side chain transmission device, the driving side chain transmission device comprising a main transmission roller, a driving sprocket shaft concentrically fixed at both ends of the main transmission roller, and a driving sprocket fixed on the driving sprocket shaft, the main transmission roller being connected with the chain drive device, the driven side chain transmission device comprising a driven roller and a driven sprocket, the driven sprocket being arranged on both sides of the driven roller, the driven roller being arranged in parallel with the main transmission roller, and the two transmission chains being connected with the driving sprocket and the driven sprocket on the corresponding side, the driven roller being a driven sprocket shaft, the driven sprocket shaft being arranged in parallel with the driving sprocket shaft with a fixed distance, the driven sprocket being arranged on the driven sprocket shaft, the transmission belt tension adjusting mechanism comprising a tension adjusting actuating mechanism, a driven roller cylinder, and a driven roller cylinder fixing sleeve, the driven roller cylinder fixing sleeve being sleeved outside the driven sprocket shaft, both ends of the driven roller cylinder being rotatably arranged outside the driven roller cylinder fixing sleeve, the driven roller cylinder fixing sleeve and the driven sprocket shaft having a certain distance in the running direction of the transmission belt, one end of the driven roller cylinder fixing sleeve being located inside the driven roller cylinder, and the other end being located outside the driven roller cylinder, the driven roller cylinder fixing sleeve and the driven sprocket shaft being not connected, the output end of the tension adjusting actuating mechanism being fixedly connected with one end of the driven roller cylinder fixing sleeve located outside the driven roller cylinder through a push-pull arm, the driven roller cylinder and the driven roller cylinder fixing sleeve being supported by the push-pull arm, under the drive of the tension adjusting actuating mechanism, the push-pull arm reciprocates to drive the driven roller cylinder sleeve to reciprocate in the direction of the transmission belt running, thereby driving the driven roller cylinder to reciprocate in the direction of the transmission belt running, so as to adjust the distance between the driven roller cylinder and the main transmission roller to make them approach or move away from each other, the distance by which the driven roller cylinder and the main transmission roller approach or move away from each other being greater than or equal to the length of the transmission belt needed to be increased when the pull beam assembly passes around the transmission roller;

[0007] The driven sprocket shaft is a through shaft or two short shafts with a common center line, and / or the roller cylinder fixing sleeve is a long shaft sleeve or two short shaft sleeves arranged with a common center line; or the tension adjusting actuating mechanism is a servo drive mechanism, the servo drive mechanism being a servo motor, a servo hydraulic cylinder, a servo pneumatic cylinder or a servo electric cylinder; or one tension adjusting actuating mechanism is arranged on each side of the length of the driven roller cylinder and fixedly connected with the corresponding side of the driven roller cylinder fixing sleeve through a push-pull arm;

[0008] The outer diameters of the main transmission roller and the driven roller cylinder are equal or not equal, and the outer diameters of the driven sprocket shaft and the driving sprocket shaft are equal or not equal;

[0009] The length of the transmission belt is greater than or equal to the total length required when the transmission belt is wrapped around the two driving rollers, that is, the center line distance between the two driving rollers plus the sum of the radii of the two driving rollers, and is less than the total length of the transmission belt when the transmission belt sags to the maximum sag limit of the transmission belt; or the length of the transmission belt is the theoretical design length of the transmission belt, which is the center line distance between the main driving roller and the driven roller cylinder plus the sum of the radii of the driven roller cylinder and the main driving roller multiplied by a coefficient, the coefficient being greater than or equal to 1 and less than or equal to 1.01;

[0010] The tension control system further comprises a tension adjustment actuating mechanism, a drag beam assembly position detection device, and a control device. The output end of the control device is electrically connected to the tension adjustment actuating mechanism, and the input end of the control device is electrically connected to the drag beam assembly position detection device. When the drag beam assembly position detection device detects that the drag beam assembly is running around the driving roller, the control device controls the tension adjustment actuating mechanism to drive the driven roller cylinder to move to change the distance between the main driving roller and the driven roller cylinder, so that the transmission belt can smoothly pass through the main driving roller and / or the driven roller cylinder, and the sag length of the transmission belt is less than the maximum sag limit of the transmission belt.

[0011] When the drag beam assembly position detection device detects that the drag beam assembly moves from position X2 to position X3, the control device controls the tension adjustment actuating mechanism to drive the driven roller cylinder to move towards the main driving roller. When the drag beam assembly position detection device detects that the drag beam assembly moves from position X3 to position X2, the control device controls the tension adjustment actuating mechanism to drive the driven roller cylinder to move away from the main driving roller. The tension control device is a PLC. The transmission chain is a precision transmission roller chain.

[0012] When the drag beam assembly position detection device detects that the drag beam assembly moves from position X2 to position X3 and then to position X4, the control device controls the tension adjustment actuating mechanism to drive the driven roller cylinder to move towards or away from the main driving roller synchronously to keep the transmission belt at a constant tension.

[0013] The drag beam assembly position detection device is a position sensor, which is fixedly arranged at positions corresponding to the X2 and X3 points of the driving roller. The position sensor is a speed sensor, which is fixedly arranged at positions corresponding to the X2 and X3 points of the driving roller, and the position of the drag beam assembly is determined by sensing the speed change of the transmission belt. Alternatively, the position sensor is a torque sensor, which is used to detect the torque change of the output shaft of the driving motor of the chain transmission driving device. When the shaft torque of the chain transmission driving device is detected to decrease, the tension adjustment actuating mechanism is actuated to increase the distance between the driven roller cylinder and the main driving roller.

[0014] A photovoltaic module laminator includes a worktable and a photovoltaic module transmission system. The photovoltaic module transmission system adopts the photovoltaic module transmission system used in any of the aforementioned photovoltaic module laminators. The main drive roller and the driven roller are located at the front end and rear end of the worktable, respectively. The conveyor belt is arranged around the main drive roller, the driven roller, and the worktable. Alternatively, the laminator is a multi-layer laminator, each layer of which includes a laminator unit. Each laminator unit is arranged in upper and lower layers. Each laminator unit includes a worktable and a photovoltaic module transmission system. The photovoltaic module transmission system adopts the photovoltaic module transmission system used in any of the aforementioned photovoltaic module laminators. The main drive roller and the driven roller are located at the front end and rear end of the worktable, respectively. The conveyor belt is arranged around the main drive roller, the driven roller, and the worktable. The conveyor belt of the upper laminator unit serves as the photovoltaic module covering belt of the lower laminator unit.

[0015] The workbench is a heating plate or a cooling plate, or includes both a heating plate and a cooling plate, with the heating plate and cooling plate arranged in front of and behind each other.

[0016] The advantages and beneficial effects of this utility model are as follows:

[0017] The photovoltaic module transmission system used in the photovoltaic module laminator with the structure of this utility model has a unique feature: the driven roller is separately configured with a driven sprocket shaft and a driven roller. The driven roller can move towards or away from the driven sprocket shaft under the drive of the tension adjustment mechanism, thereby changing the distance between the driven roller and the main drive roller. This allows the tension adjustment mechanism to drive the driven roller towards or away from the main drive roller when the conveyor belt passes around the drive roller, thus changing the distance between the main drive roller and the driven roller to compensate for the increased transmission radius of the conveyor belt when the drag beam passes around the drive roller. Therefore, the length of the conveyor belt can be the designed length, allowing the conveyor belt to be taut, or even if not taut, it will not contact the photovoltaic modules of the lower lamination unit. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a layer laminating unit in a photovoltaic module laminating machine according to an embodiment of the present invention.

[0019] Figure 2 for Figure 1 Front view diagram;

[0020] Figure 3 for Figure 2 A magnified view of part A in the diagram;

[0021] Figure 4 for Figure 2 The enlarged schematic diagram of part C shows a structural schematic diagram of an embodiment of the conveyor belt tension adjustment mechanism;

[0022] Figure 5The utility model discloses photovoltaic module laminator embodiment structure schematic view.

[0023] Figure 6 is Figure 5 The top view schematic diagram.

[0024] Mark explanation

[0025] 1 - workbench 2 - active side chain transmission device 24 - active chain wheel, 25 - active chain wheel shaft, 27 - main transmission roller;

[0026] 3 - high temperature resistant conveying belt 4 - high temperature resistant conveying belt drag beam assembly, 5 - chain transmission driving device 6 - tension adjusting mechanism 61 - driven roller 62 - bearing 63 - driven roller fixed sleeve 64 - push-pull arm 65 - tension adjusting execution mechanism 67 - tension control system 7 - driven side chain transmission device 73 - driven chain wheel shaft 75 - driven chain wheel 8 - transmission chain Specific embodiments

[0027] The utility model makes further detailed below through specific embodiment, the following embodiment is only descriptive, is not limitative, can not be defined the protection scope of the utility model with this. For the convenience of description, the direction parallel with the conveying belt operation direction is called front and back, and the direction perpendicular to the conveying belt is called left and right sides. The length Lz that the conveying belt needs to increase when the drag beam encircles the single-side transmission roller is Lz=1 / 4*2piR=1 / 4*2pi (R1-R0). Wherein R0 is the radius of the conveying belt passing through the transmission roller, and R1 is the radius of the conveying belt and the fixed junction position of the drag beam passing through the horizontal center line of the transmission roller when the drag beam passes through the transmission roller. That is, Lz is equal to one fourth times 2pi (R1-R0). The above is the simplified design calculation formula of most engineering applications in the industry, and the calculation mode changes with the structure form and size of the drag beam itself. The maximum limit length of the sag of the conveying belt: when used for single-layer laminator, the maximum limit length of the sag of the conveying belt is the sag length that the conveying belt can completely and smoothly run, and when used for multi-layer laminator, it is the sag length when the conveying belt of the upper laminating unit just contacts the photovoltaic module of the lower laminating unit.

[0028] As Figures 1-6As shown, the photovoltaic module laminator of the utility model can be single-layer laminator or multi-layer laminator, when it is multi-layer laminator, laminating units of each layer are arranged in up-down stack, each laminating unit comprises workbench 1 and photovoltaic module transmission system, each photovoltaic module transmission system comprises high-temperature-resistant conveying belt 3 (hereinafter referred to as conveying belt), conveying belt transmission system for photovoltaic module laminator, conveying belt transmission system for photovoltaic module laminator comprises conveying belt driving device and conveying belt tension adjusting mechanism, conveying belt driving device comprises two parallel arranged transmission chains 8, chain transmission driving device 5, driving side chain transmission device 2 and driven side chain transmission device 7, driving side chain transmission device 2 comprises main transmission roller 27, driving sprocket shaft 25 is fixedly arranged concentrically at both ends of main transmission roller, driving sprocket 24 is fixedly arranged on driving sprocket shaft, main transmission roller 27 fixes driving sprocket shaft 25 on one side so as to drive driving sprocket 24, and plays the supporting and guiding role to conveying belt 3 on the other side, and main transmission roller is rotatably connected with rack through driving sprocket shaft.

[0029] The driven side chain transmission device 7 comprises a driven roller and a driven sprocket 75, and the driven sprocket is arranged on both sides of the driven roller. The driven roller is arranged in parallel with the main drive roller at the other end of the workbench, so that the workbench has a drive roller at each end. The transmission chain 8 is connected to the driving sprocket and the driven sprocket on the corresponding side, so that the workbench has a transmission chain on each side. The transmission belt is usually made of Teflon high-temperature-resistant cloth. The same laminating unit has at least two high-temperature-resistant transmission belts. The transmission belts of the same laminating unit are fixedly connected through the high-temperature-resistant transmission belt pulling beam assembly (hereinafter referred to as the pulling beam assembly) 4. That is, the length direction of the pulling beam assembly is fixedly connected with the width direction of the end of the transmission belt. In general, a core rod sleeve is arranged at each end of the high-temperature-resistant cloth. The core rod sleeve is arranged along the width of the transmission belt. The core rod sleeve of the pulling beam assembly is arranged in the core rod sleeve, so as to connect the width direction of the transmission belt with the length direction of the pulling beam, and fix them through the pulling beam assembly. The fixing of the pulling beam assembly and the transmission belt is a prior art and will not be described in detail. The transmission belt forms a loop under the connection and fixation of the pulling beam assembly. The two ends of the pulling beam assembly 4 are fixedly connected with the transmission chain 8 on the corresponding side. The length direction of the pulling beam assembly is perpendicular to the running direction of the transmission belt. The transmission belt 3 is arranged around the main drive roller 53, the workbench 1 and the driven roller. In the present application, the tension adjusting mechanism 6 is further arranged to adjust the tension of the transmission belt. The driven roller adopts the following structure. The driven sprocket shaft 73 is arranged in parallel with the driving sprocket shaft and has a fixed spacing. The driven sprocket shaft can be a through shaft structure. It extends from one side of the workbench to the other side of the workbench. The two ends of the driven sprocket shaft are provided with driven sprockets. The driven sprocket shaft can also be a shaft head structure. The workbench has a driven sprocket shaft on each side. The driven sprocket is fixedly arranged at the end of the driven sprocket shaft. The transmission belt tension adjusting mechanism comprises a driven roller cylinder 61, a driven roller cylinder fixing sleeve 63 and a tension adjusting execution mechanism 65. When the driven sprocket shaft is a through shaft, a driven roller cylinder fixing sleeve 63 is arranged on the inner side of the driven sprocket at the two ends of the driven sprocket shaft. The outer side of the driven roller cylinder is rotatably connected to the driven roller cylinder fixing sleeve through a bearing 62. One end of the driven roller cylinder fixing sleeve is located on the inner side of the driven roller cylinder, and the other end is located on the outer side of the driven roller cylinder.The driven roller sleeve is not fixedly connected with the driven sprocket shaft, and the driven roller sleeve and the driven sprocket shaft have a reciprocating moving distance a in the running direction of the transmission belt, the distance a is greater than or equal to the tensioning moving distance of the driven roller, and greater than or equal to the length required to increase the transmission belt when the dragging beam assembly passes through the transmission roller. One end of the push-pull arm 64 is fixedly connected with the output end of the tension adjustment actuator 65, and the other end of the push-pull arm is fixedly connected with the outer circumferences of one end of the driven roller sleeve located outside the driven roller. Under the driving of the tension adjustment actuator, the push-pull arm reciprocates to drive the driven roller sleeve to move along the running direction of the transmission belt, thereby driving the driven roller to reciprocate along the running direction of the transmission belt, so as to adjust the distance between the driven roller and the main transmission roller to allow the length required to increase the transmission belt when the dragging beam passes through the roller. The push-pull arm supports the driven roller sleeve. The driven roller and the driven sprocket shaft form a transmission roller. The tension adjustment actuator drives the push-pull arm, thereby driving the driven roller. The tension adjustment actuators on both sides move synchronously. Since the driven roller sleeve is supported and fixed by the corresponding push-pull arm, and the two ends of the driven roller are rotatably connected with the driven roller sleeve through bearings, when the driven roller sleeve reciprocates, the driven roller can also reciprocate. In this structure, the driven roller serves as a support component when the transmission belt is wrapped around, and the driven sprocket shaft only serves to support the driven sprocket. The distance between the driven sprocket shaft and the main transmission roller is fixed and unchangeable. Therefore, by driving the driven roller sleeve to reciprocate, the distance between the driven roller for supporting the transmission belt and the main transmission roller can be changed, so that when the dragging beam assembly passes through the main transmission roller and / or the driven roller, the distance between the two is reduced by the corresponding adjustment of the actuator, so that the transmission belt does not become tight due to the increase in the wrapping radius of the transmission belt when the dragging beam passes through the roller, and the dragging beam can smoothly pass through the main transmission roller and / or the driven roller. When the dragging beam does not pass through the transmission roller, the actuator drives the driven roller to move away from the main transmission roller to increase the distance between the two, thereby accommodating the length of the transmission belt that is "left over" due to the decrease in the wrapping diameter of the transmission belt, so that the transmission belt is not slack and does not sag to meet the photovoltaic module below, thereby avoiding the transmission belt from meeting the photovoltaic module or other moving components below, such as the dragging beam arranged above and below, during operation. Preferably, the radius of the main transmission roller is equal to the radius of the driven roller, and the diameter of the driving sprocket shaft is equal to the diameter of the driven sprocket shaft, so that the transmission belt can move in the horizontal plane.Of course, the radius of the main drive roller and the radius of the driven roller can be different, and can be larger or smaller. For example, when the diameter of the driven roller is large, its rotation speed will be slower than that of the main drive roller because it is a driven wheel, and vice versa. Similarly, the diameter of the drive sprocket shaft and the diameter of the driven sprocket shaft can also be different. For example, the diameter of the drive sprocket shaft can be larger than that of the driven sprocket shaft. Since the driven sprocket shaft is a driven shaft, its rotation speed will be slightly slower, and vice versa.

[0030] The working process and principle of this utility model are as follows: Figure 5 As shown, when the towing beam assembly circles the drive roller, specifically from position X2 (where the vertical center line of the drive roller intersects with its outer circumference) to position X3 (where the horizontal center line of the drive roller intersects with its outer circumference), the conveyor belt is supported by the towing beam assembly. At this time, a portion of the conveyor belt detaches from the upper surface of the drive roller and the worktable, thus increasing the radius of its circle around the drive roller, creating a distance 'a' between it and the drive roller. During the towing beam's movement from position X2 to position X3 along the circumference, a high point will appear on this quarter-circle. This high point will vary depending on the structure and dimensions of the towing beam itself. At this point, the distance 'a' between the conveyor belt and the drive roller reaches its maximum value. When moving downwards from point X3... As the X2 point moves, this distance gradually decreases until it reaches the X2 point again, at which point the conveyor belt is once again at an angle to the transmission roller. To prevent the conveyor belt from being torn and the transmission chain from breaking when the drag beam assembly drives the conveyor belt through the X2 point, X3 point, to the next vertical center line and the outer circumference of the transmission roller at the X4 point, the tension adjustment mechanism is activated, driving the push-pull arm to move so that the driven roller moves towards the main transmission roller, reducing the distance between the driven roller and the main transmission roller. The maximum moving distance of the push-pull arm is greater than or equal to the product of the distance between the conveyor belt and the driven roller when the drag beam passes the high point position to the X3 point, Lz=1 / 4×2πR=1 / 4×2π(R1-R0) and the number of drag beams passing the transmission roller. The maximum moving distance of the driven roller fixing sleeve is calculated as follows: During the 1 / 4 circumferential motion of the high-temperature conveyor belt driven by the high-temperature conveyor belt drag beam assembly 4 from position X2 to position X3, to ensure that the conveyor belt moves within this distance range when passing the roller, the actuator drives the driven roller fixing sleeve to prevent the conveyor belt from tearing at the highest position. R1 can be calculated or measured as follows: R1 is the radius of the conveyor belt when the fixed intersection position of the drag beam and the drive beam passes the horizontal center line of the drive roller. In this invention, the actuator pushes the driven roller fixing sleeve to move towards or away from the drive roller, adaptively increasing or decreasing the distance between the driven roller and the main drive roller, thereby compensating for the change in conveyor belt length requirements caused by the drag beam passing the drive roller.

[0031] In this invention, the length of the conveyor belt can be determined according to its theoretical design length, and the length of the transmission chain can be determined according to its theoretical design length. The theoretical design length of the conveyor belt is the sum of the distance between the center lines of the main drive roller and the driven roller and the radius of the driven roller and the main drive roller, multiplied by a coefficient. Typically, this coefficient is greater than or equal to 1 and less than or equal to 1.01. This coefficient is empirical data. Appropriate adjustments can be made based on the structure of the drag beam. Currently, the drag beam structure used is a tie rod plus mandrel type, with the mandrel fitted into a bushing at the end of the conveyor belt.

[0032] The length of the transmission belt can also be determined according to the length of the transmission belt when the transmission belt is clamped on the transmission roller, so that the sag of the transmission belt can be avoided. The length of the transmission belt when the transmission belt is clamped on the transmission roller is multiplied by a certain coefficient, so that the sag length of the transmission belt when the drag beam passes through the roller is appropriate, and the transmission process does not meet the workpiece located in the lower layer. Normally, the driven roller is coaxial with the driven chain shaft, and when the drag beam passes through the transmission roller, the tension adjusting actuator drives the driven roller to move towards the main transmission roller, thereby leaving the length of the transmission belt that needs to be increased when the drag beam passes through the roller. The position information of the drag beam can be used to drive the tension adjusting actuator to move, and the driven roller fixed sleeve is driven. When the drag beam reaches the X2 point position, the tension adjusting actuator is started, and the driven roller is moved. At this time, a position sensor needs to be set to detect the position of the drag beam. The change of the torque of the chain drive driving device driving motor shaft can also be used to start the tension adjusting actuator. A torque sensor is arranged on the motor shaft, and when the chain drive driving device shaft torque is detected to increase, the tension adjusting actuator is actuated to reduce the distance between the driven roller and the main transmission roller. When the chain drive driving device shaft torque is detected to decrease, the tension adjusting actuator is actuated to increase the distance between the driven roller and the main transmission roller. The tension adjusting actuator adopts a servo driving mechanism, such as a servo motor, a servo hydraulic cylinder, a servo air cylinder, a servo electric cylinder, etc. A torque sensor is arranged on the motor shaft and connected with the servo driving mechanism. A transmission belt tension control device is arranged, which generally adopts PLC or MCU (single-chip microcomputer). The input end of the transmission belt tension control device is connected with the detection device, and the output end is connected with the tension adjusting actuator. When the drag beam reaches the X2 point X3 point and moves, the driven roller is driven to move towards the main transmission roller. When the drag beam moves from the X3 point to the X2 point, the driven roller moves away from the main transmission roller. In order to make the mechanism coordinated and easy to control, two drag beam assemblies are usually used, and the lengths of the transmission belts on both sides of the two drag beam assemblies are equal. Therefore, when one side of the drag beam passes through the transmission roller, the other side of the drag beam passes through the transmission roller in the opposite direction synchronously. The position of the drag beam can also be obtained by detecting the change of the linear speed of the drag beam, and the actuator adjusts the moving distance and direction of the driven roller fixed sleeve according to the change of the linear speed of the drag beam.The movement speed V0 of the transmission chain is constant, the movement direction of the high-temperature-resistant transmission belt dragging beam assembly 4 is parallel to the movement direction of the transmission chain, and the running speeds of the two are equal because they are fixedly connected, that is, V1=V0, wherein V1 is the movement speed of the high-temperature-resistant transmission belt dragging beam assembly 4; when the high-temperature-resistant transmission belt dragging beam assembly moves from the position X2 to the horizontal radial position X3 of the transmission shaft, the movement is 1 / 4 circumferential movement, the movement speed of the transmission chain remains constant V1, at this time, the movement speed V2 of the high-temperature-resistant transmission belt dragging beam assembly 4 is (R1 / R0) V1, wherein V2 is the speed of the high-temperature-resistant transmission belt dragging beam assembly 4, R0 is the radius of the transmission belt passing through the transmission roller, and R1 is the radius of the transmission belt and the dragging beam fixed intersection position passing through the horizontal center line of the transmission roller when the dragging beam passes through the transmission roller, and it can be known that V2 becomes fast. Therefore, the position of the dragging beam can also be known by detecting the change of the linear speed of the dragging beam, so that the actuator drives the driven roller cylinder fixing sleeve to move a corresponding distance. Constant tension can be achieved. The transmission chain is preferably a precision transmission roller chain, which can improve the transmission accuracy, improve the accuracy of the movement distance of the driven roller cylinder fixing sleeve, and improve the adjustment effect of the transmission belt. The tension control device can also be used to adjust the speed and direction of the movement of the driven roller driven by the adjustment actuator, so that the dragging beam assembly runs synchronously around the transmission roller, and the transmission belt reaches constant tension. The transmission system of the utility model has the transmission belt tension adjustment mechanism and the control device, so that the adjustment can be performed by measuring the change of the torque, thereby preventing the excessive increase of the torque of the motor and preventing the transmission chain from being broken or the transmission belt from being torn.

Claims

1. A photovoltaic module transmission system for a photovoltaic module laminator, comprising a transmission belt, a transmission belt drive system for a photovoltaic module laminator, the transmission belt drive system for a photovoltaic module laminator comprising a transmission belt drive device and a transmission belt tension adjusting mechanism, the transmission belt drive device comprising two parallel transmission chains, a chain drive drive device, a driving side chain transmission device and a driven side chain transmission device, the driving side chain transmission device comprising a main drive roller, a driving sprocket shaft being fixedly arranged in a concentric manner at both ends of the main drive roller, a driving sprocket being fixedly arranged on the driving sprocket shaft, the main drive roller being connected with the chain drive drive device, characterized in that, The driven side chain transmission device comprises a driven roller and driven sprocket, the driven sprocket is arranged on both sides of the driven roller, the driven roller is arranged in parallel with the main drive roller, two transmission chains are respectively connected with the driving sprocket and the driven sprocket on the corresponding side, the driven roller shaft is parallel to the driving sprocket shaft and is arranged with a fixed spacing, the driven sprocket is arranged on the driven sprocket shaft, the transmission belt tension adjusting mechanism comprises a tension adjusting actuator, a driven roller cylinder, a driven roller cylinder fixing sleeve, the driven roller cylinder fixing sleeve is sleeved outside the driven sprocket shaft, both ends of the driven roller cylinder are rotatably arranged outside the driven roller cylinder fixing sleeve, the driven roller cylinder fixing sleeve and the driven sprocket shaft have a distance in the running direction of the transmission belt, one end of the driven roller cylinder fixing sleeve is located inside the driven roller cylinder, and the other end is located outside the driven roller cylinder, the driven roller cylinder fixing sleeve is not connected with the driven sprocket shaft, the output end of the tension adjusting actuator is fixedly connected with one end of the driven roller cylinder fixing sleeve outside the driven roller cylinder through a push-pull arm, and the driven roller cylinder and the driven roller cylinder fixing sleeve are supported by the push-pull arm; under the drive of the tension adjusting actuator, the push-pull arm reciprocates to drive the driven roller cylinder sleeve to reciprocate along the running direction of the transmission belt, so that the driven roller cylinder reciprocates along the running direction of the transmission belt, and the distance between the driven roller cylinder and the main drive roller is adjusted to make the distance between them approach or move away from each other, and the distance by which the driven roller cylinder and the main drive roller approach or move away from each other is greater than or equal to the length that needs to be increased by the transmission belt when the drag beam assembly passes around the drive roller.

2. A photovoltaic module drive system for use in a photovoltaic module laminator as defined in claim 1, wherein: The driven sprocket shaft is a through shaft or two short shafts with a common center line, and / or the roller cylinder fixing sleeve is a long shaft sleeve or two short shaft sleeves arranged with a common center line; or the tension adjusting actuator is a servo drive mechanism, the servo drive mechanism is a servo motor, a servo hydraulic cylinder, a servo pneumatic cylinder or a servo electric cylinder; or one tension adjusting actuator is arranged on the length of the driven roller cylinder on both sides and is fixedly connected with the driven roller cylinder fixing sleeve on the corresponding side through a push-pull arm.

3. A photovoltaic module drive system for use in a photovoltaic module laminator as defined in claim 1, wherein, The outer diameters of the main drive roller and the driven roller cylinder are equal or unequal, and the outer diameters of the driven sprocket shaft and the driving sprocket shaft are equal or unequal.

4. A photovoltaic module drive system for use in a photovoltaic module laminator as defined in claim 1 or 3, wherein, The length of the transmission belt is greater than or equal to the total length required when the transmission belt is wrapped around the two drive rollers, that is, the center line distance between the two drive rollers and the sum of the radii of the two drive rollers, and is less than the total length of the transmission belt when the transmission belt is sagged to the maximum limit of the sag of the transmission belt; or the length of the transmission belt is the theoretical design length of the transmission belt, and the theoretical design length of the transmission belt is the center line distance between the main drive roller and the driven roller cylinder and the sum of the radii of the driven roller cylinder and the main drive roller multiplied by a coefficient, the coefficient is greater than or equal to 1 and less than or equal to 1.

01.

5. A photovoltaic module drive system for use in a photovoltaic module laminator as defined in claim 1, wherein, The tension control system comprises a pulling beam assembly position detection device and a control device, an output end of the control device is electrically connected with a tension adjustment actuating mechanism, and an input end of the control device is electrically connected with the pulling beam assembly position detection device.

6. A photovoltaic module drive system for use in a photovoltaic module laminator as defined in claim 5, wherein, When the pulling beam assembly position detection device detects that the pulling beam assembly moves from position X2 to position X3, the control device controls the tension adjustment actuating mechanism to drive the driven roller to move towards the main driving roller; when the pulling beam assembly position detection device detects that the pulling beam assembly moves from position X3 to position X2, the control device controls the tension adjustment actuating mechanism to drive the driven roller to move away from the main driving roller; or the control device is a PLC; or the transmission chain is a precision transmission roller chain.

7. A photovoltaic module drive system for use in a photovoltaic module laminator as defined in claim 6, wherein, When the pulling beam assembly position detection device detects that the pulling beam assembly moves from position X2 to position X3 and then to position X4, the control device controls the tension adjustment actuating mechanism to drive the driven roller to synchronously move towards or away from the main driving roller, so that the transmission belt maintains constant tension.

8. A photovoltaic module drive system for use in a photovoltaic module laminator as defined in claim 6, wherein, The pulling beam assembly position detection device is a position sensor, and the position sensor is fixedly arranged at positions corresponding to the X2 and X3 points of the driving roller; or the position sensor is a speed sensor, and the speed sensor is fixedly arranged at positions corresponding to the X2 and X3 points of the driving roller, and the position of the pulling beam assembly is determined by sensing the speed change of the transmission belt; or the position sensor is a torque sensor, and the torque sensor is used for detecting the torque change of an output shaft of a driving motor of the chain transmission driving device, and when the shaft torque of the chain transmission driving device is detected to decrease, the tension adjustment actuating mechanism is actuated to increase the distance between the driven roller and the main driving roller.

9. A photovoltaic module laminator comprising a worktable and a photovoltaic module transport system, characterized in that, The photovoltaic module transmission system adopts the photovoltaic module transmission system of the photovoltaic module laminator in any one of claims 1 to 8, the main driving roller and the driven roller are respectively located at the front end and the rear end of the workbench, and the transmission belt is arranged around the main driving roller, the driven roller and the workbench; or the laminator is a multi-layer laminator, each layer of the laminator comprises a laminating unit, the laminating units are arranged in layers, each laminating unit comprises a workbench and a photovoltaic module transmission system, the photovoltaic module transmission system adopts the photovoltaic module transmission system of the photovoltaic module laminator in any one of claims 1 to 8, the main driving roller and the driven roller are respectively located at the front end and the rear end of the workbench, and the transmission belt is arranged around the main driving roller, the driven roller and the workbench, and the transmission belt of the upper laminating unit covers the photovoltaic module of the lower laminating unit.

10. A photovoltaic module laminator as defined in claim 9, wherein, The workbench is a heating plate or a cooling table, or simultaneously comprises a heating plate and a cooling plate, and the heating plate and the cooling plate are arranged in front of and behind each other.

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