Transmission equipment, photovoltaic glass tempering production line and tempering method

Abstract

The present invention belongs to the technical field of transmission equipment, and discloses a transmission equipment, a photovoltaic glass tempering production line and a tempering method. The transmission equipment includes a transmission device and a detection device, the transmission device is used to transport photovoltaic glass into the heating chamber of the heating device, the detection device is used to detect the number n and / or mass q of photovoltaic glass entering the heating device within a preset time period t, and the detection device signal is connected to the transmission device or the heating device, so that the number n and / or mass q of photovoltaic glass matches the actual temperature k1 in the heating chamber. According to the number n and / or mass q of photovoltaic glass entering the heating chamber within the preset time period t obtained by actual detection, and the actual temperature k1 in the heating chamber, at least one of the heating device and the transmission device is correspondingly adjusted, so that in the photovoltaic glass tempering production line, the actual temperature k1 in the heating chamber is the same as the process temperature k2, which can improve the tempering yield of photovoltaic glass and reduce white fog, warping and other phenomena.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission equipment, and in particular to a transmission equipment, a photovoltaic glass tempering production line and a tempering method. Background Art

[0002] Photovoltaic glass tempering is a process that treats ordinary glass through a specific tempering process to make it stronger and more durable. This process mainly includes two steps: rapid heating and rapid cooling, which forms a compressive stress layer on the surface of the glass and a tensile stress layer inside, thereby improving the mechanical properties and impact resistance of the glass.

[0003] However, after the existing tempering process, the flatness of photovoltaic glass often fails to reach the theoretical value, and white fog, warping and other phenomena will occur, resulting in a low yield rate of photovoltaic glass after tempering, and also increasing the production cost of photovoltaic glass.

[0004] Based on the above, there is an urgent need for a transmission device, a photovoltaic glass tempering production line and a tempering method to solve the above technical problems. Summary of the invention

[0005] The first object of the present invention is to provide a transmission device capable of improving the tempering yield of photovoltaic glass.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] Transmission equipment, including:

[0008] A transmission device, wherein the transmission device is capable of conveying the photovoltaic glass so that the photovoltaic glass passes through a heating device and a cooling device in sequence to achieve a tempering treatment;

[0009] A detection device, wherein the detection device is used to detect the quantity n and / or mass q of the photovoltaic glass input by the transmission device to the heating device within a preset time period t, and the detection device signal is connected to at least one of the transmission device and the heating device, so that the transmission device can adjust the actual temperature k1 of the heating device according to the quantity n and / or mass q of the photovoltaic glass transported within the preset time period t, or adjust the quantity n and / or mass q of the photovoltaic glass transported within the preset time period t according to the actual temperature k1 of the heating device.

[0010] Preferably, the detection device comprises at least one of a photoelectric sensor, a pressure sensor and a capacitive sensor, and the detection device is arranged upstream of the heating device or at the inlet of the heating device.

[0011] Preferably, the transmission device further comprises a spacing adjustment component, and the spacing adjustment component is used to adjust the spacing s between two adjacent photovoltaic glasses.

[0012] The beneficial effects of the present invention are as follows: through the transmission equipment, the number n and / or mass q of photovoltaic glasses entering the heating chamber within a preset time period t can be obtained, and in the tempering process, the heating power w of the heating device is adjusted according to the number n and / or mass q of photovoltaic glasses entering the heating chamber within the preset time period t, or the number n and / or mass q of photovoltaic glasses entering the heating chamber within the preset time period t is adjusted according to the actual temperature k1 in the heating chamber, so that the actual temperature k1 in the heating chamber can be kept consistent with the process temperature k2, and then the actual working conditions can be kept consistent with the theoretical working conditions, thereby greatly reducing the occurrence of white fog, warping and other phenomena, and ensuring the yield rate of the tempering process.

[0013] The second object of the present invention is to provide a photovoltaic glass tempering production line, which can improve the tempering yield of photovoltaic glass.

[0014] To achieve this object, the present invention adopts the following technical solutions:

[0015] A photovoltaic glass tempering production line includes a heating device, a cooling device and the above-mentioned transmission equipment, wherein the transmission device of the transmission equipment is arranged upstream of the heating device, and the heating device is arranged upstream of the cooling device. The detection device of the transmission equipment is used to detect the number n and / or quality q of the photovoltaic glass passing through the transmission device, and is connected to a signal of at least one of the heating device and the transmission device.

[0016] Preferably, a shaping device is provided between the heating device and the cooling device, and the shaping device can blow air to cool the heated photovoltaic glass to stabilize its shape.

[0017] Preferably, the heating device comprises a plurality of furnace wires, the furnace wires are used to respectively increase the actual temperature k1 at different positions in the heating device, the furnace wires are connected to solid-state relays, and the solid-state relays are connected to fuses;

[0018] The heating device further comprises a plurality of mutual inductors, wherein the mutual inductors are used to detect the current between each of the furnace wires and the corresponding solid-state relay, and / or the mutual inductors are used to detect the current between each of the solid-state relays and the corresponding fuse.

[0019] The beneficial effects of the present invention are as follows: through the photovoltaic glass tempering production line, the number n and / or mass q of photovoltaic glasses entering the heating chamber within a preset time period t can be obtained, and in the tempering process, the heating power w of the heating device is adjusted according to the number n and / or mass q of photovoltaic glasses entering the heating chamber within the preset time period t, or the number n and / or mass q of photovoltaic glasses entering the heating chamber within the preset time period t is adjusted according to the actual temperature k1 in the heating chamber, so that the actual temperature k1 in the heating chamber can be kept consistent with the process temperature k2, and then the actual working conditions can be kept consistent with the theoretical working conditions, thereby greatly reducing the occurrence of white fog, warping and the like, and ensuring the yield rate of the tempering process.

[0020] The third object of the present invention is to provide a photovoltaic glass tempering method, which can improve the tempering yield of photovoltaic glass.

[0021] To achieve this object, the present invention adopts the following technical solutions:

[0022] Photovoltaic glass tempering method, comprising:

[0023] Obtaining the actual temperature k1 in the heating chamber within a preset time period t and the number n and / or mass q of photovoltaic glass entering the heating chamber;

[0024] Adjusting the actual temperature k1 in the heating chamber according to the quantity n and / or mass q of the photovoltaic glass entering the heating chamber within a preset time period t, and / or adjusting the quantity n and / or mass q of the photovoltaic glass entering the heating chamber within a preset time period t according to the actual temperature k1 in the heating chamber;

[0025] The photovoltaic glass is input into the heating chamber for heating, and then subjected to cooling treatment to achieve tempering.

[0026] Preferably, the photovoltaic glass tempering method further comprises:

[0027] The distance between two adjacent photovoltaic glasses is adjusted, and / or the speed at which the photovoltaic glasses enter the heating chamber is adjusted.

[0028] Preferably, the photovoltaic glass tempering method further comprises:

[0029] When the photovoltaic glass leaves the heating chamber, the photovoltaic glass is subjected to shaping and cooling.

[0030] Preferably, the photovoltaic glass undergoes three stages in the heating chamber: initial heating stage, middle heating stage and late heating stage, and,

[0031] When the photovoltaic glass has defects such as low surface temperature or low stress, increasing the actual temperature k1 of the photovoltaic glass at the location during the late heating process; or

[0032] When the middle part of the photovoltaic glass has a white fog defect, the actual temperature k1 of the upper part of the photovoltaic glass at the initial stage of heating is increased, or the actual temperature k1 of the lower part of the photovoltaic glass at the initial stage of heating is decreased; or

[0033] When the edge of the photovoltaic glass has a white fog defect, the actual temperature k1 of the lower part of the photovoltaic glass at the initial heating process is increased, or the actual temperature k1 of the upper part of the photovoltaic glass at the initial heating process is decreased; or,

[0034] When the photovoltaic glass has an upward bending defect, the actual temperature k1 of the lower part of the heating chamber is increased, or the actual temperature k1 of the upper part of the heating chamber is decreased; or,

[0035] When the photovoltaic glass has a downward bending defect, the actual temperature k1 of the upper part of the heating chamber is increased, or the actual temperature k1 of the lower part of the heating chamber is decreased; or,

[0036] When the photovoltaic glass has a defect of excessive warping, at least the actual temperature k1 of the upper portion of the photovoltaic glass during the initial heating stage and the middle heating stage is reduced.

[0037] Preferably, the heating power w of the heating chamber is adjusted according to the number n and / or mass q of the photovoltaic glass, so as to correspondingly adjust the actual temperature k1 of the upper and / or lower part of the heating chamber.

[0038] The beneficial effect of the present invention is that through the above-mentioned photovoltaic glass tempering method, the actual temperature k1 can be ensured to be the same as the process temperature k2, so that the photovoltaic glass can be heated to the optimal temperature and then cooled, thereby achieving a tempering process with a higher yield rate and avoiding the occurrence of white fog, warping and other phenomena. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the photovoltaic glass tempering production line provided by the present invention;

[0040] Figure 2 It is a schematic diagram of the transmission device provided by the present invention.

[0041] In the figure:

[0042] 1. Heating device;

[0043] 2. Cooling device;

[0044] 3. Detection device;

[0045] 4. Shaping device;

[0046] 51. Conveying roller; 52. Loading platform. DETAILED DESCRIPTION

[0047] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0048] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0050] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0051] The following is based on the attached Figure 1 To Attachment Figure 2 The invention introduces the transmission equipment, photovoltaic glass tempering production line and tempering method provided by the invention.

[0052] Specifically, Figure 1As shown, in this embodiment, the photovoltaic glass tempering production line includes a heating device 1, a cooling device 2 and a transmission device, the transmission device includes a transmission device and a detection device 3, the transmission device, the heating device 1 and the cooling device 2 are connected and arranged in sequence, and the detection device 3 is arranged at the transmission device or the heating device 1. Among them, the heating device 1 includes a heating chamber and a heating component, the heating component can form a high temperature in the heating chamber, and when the photovoltaic glass enters the heating chamber, it can be quickly heated. The cooling device 2 can quickly cool the heated photovoltaic glass to achieve tempering.

[0053] The detection device 3 is arranged at the entrance of the heating chamber or upstream of the heating device 1, and is used to detect the number n of photovoltaic glasses entering the heating chamber through the transmission device within a preset time period t. In addition, the detection device 3 is connected to the heating device 1 by a signal, so that the control component in the heating device 1 controls the heating power w of the heating component according to the detected number n, thereby adjusting and maintaining the actual temperature k1 in the heating chamber.

[0054] Exemplarily, in this embodiment, at least one of the transmission equipment and the photovoltaic glass tempering production line includes a PLC (programmable logic controller), which, as a control component, can receive the signal of the detection device 3 and control the heating power w of the heating component, or control the speed of the transmission equipment to transport the photovoltaic glass. In the conventional tempering process, the heating chamber is set to the most suitable temperature for heating according to the inherent properties of the photovoltaic glass, so as to obtain a better process effect (this temperature is defined as the process temperature k2 in the present invention). However, since the photovoltaic glass constantly enters and leaves the heating chamber, it will take away the heat in the heating chamber, which will cause the actual temperature k1 of the photovoltaic glass in the heating chamber to deviate from the process temperature k2 that it should be in, so that the actual temperature k1 is often less than the process temperature k2. This will result in a low yield rate of photovoltaic glass after tempering, and it is prone to white fog, warping and other phenomena.

[0055] Through the transmission equipment or photovoltaic glass tempering production line, the number n of photovoltaic glasses entering the heating chamber within the preset time period t can be obtained, and in the tempering process, the heating power w of the heating component is adjusted according to the number n of photovoltaic glasses entering the heating chamber within the preset time period t, or the number n of photovoltaic glasses entering the heating chamber within the preset time period t is adjusted according to the actual temperature k1 in the heating chamber. In this way, the actual temperature k1 in the heating chamber can be kept consistent with the process temperature k2, and the actual working conditions can be kept consistent with the theoretical working conditions, which greatly reduces the occurrence of white fog, warping and other phenomena and ensures the yield rate of the tempering process.

[0056] Of course, in some other embodiments, the detection device 3 can also be connected to the transmission device by signal, so that the transmission device adjusts the number n of photovoltaic glasses entering the heating chamber within a preset time period t by controlling the transmission speed, etc., so as to match the heating power w of the current heating component, so as to achieve the effect of keeping the actual temperature k1 in the heating chamber consistent with the process temperature k2. Exemplarily, the transmission device includes a transmission roller 51 and a loading platform 52, and the transmission roller 51 is used to transmit the photovoltaic glass to the heating chamber through the loading platform 52. The detection device 3 can be arranged at the transmission roller 51, which can detect the number n of photovoltaic glasses transmitted to the heating chamber through the transmission roller 51, and can also be connected to the drive motor of the transmission roller 51 by signal, so as to adjust the transmission speed of the transmission roller 51.

[0057] Optionally, in this embodiment, the detection device 3 includes at least one of a photoelectric sensor, a pressure sensor, and a capacitive sensor. Preferably, the detection device 3 includes a photoelectric sensor, which is arranged at the entrance of the heating chamber and can detect the number n of photovoltaic glasses entering the heating chamber within a preset time period t, so as to obtain the difference law between the actual temperature k1 and the process temperature k2 within the preset time period t by calculation or statistics (it should be noted that the difference law is also affected by the number n of photovoltaic glasses input within the preset time period t). The operator can adjust the number n according to the actual temperature k1 or adjust the actual temperature k1 according to the number n according to the difference law, so that the actual temperature k1 can be consistent with the process temperature k2.

[0058] Furthermore, the transmission device also includes a spacing adjustment component, and the spacing adjustment component signal is connected to the detection device 3. The spacing adjustment component includes a blocking cylinder, which can be extended to block the movement of the photovoltaic glass on the transmission roller 51, and can also be retracted to allow the blocked photovoltaic glass to continue to pass through the transmission roller 51. Through the spacing adjustment component, the spacing s between two adjacent photovoltaic glasses can be adjusted, so that the transmission device can make the actual temperature k1 in the heating chamber the same as the process temperature k2 by changing the number n of photovoltaic glasses entering the heating chamber within a preset time period t while the heating power w of the heating component remains unchanged, thereby improving the tempering yield of the photovoltaic glass and reducing white fog, warping and other phenomena.

[0059] Of course, the spacing s between two adjacent photovoltaic glasses can also be adjusted by the above-mentioned spacing adjustment component to ensure the uniformity and consistency of the spacing s, so that the actual temperature k1 in the heating chamber has a smaller fluctuation value, ensuring that the actual temperature k1 is the same as the process temperature k2.

[0060] Optionally, in some other embodiments, the mass q of the photovoltaic glass entering the heating chamber within a preset time period t can be detected, and the actual temperature k1 can be adjusted accordingly according to the mass q, or the mass q can be adjusted according to the actual temperature k1, so that the actual temperature k1 and the process temperature k2 can be kept consistent during the tempering process. Of course, in combination with the inherent parameters of photovoltaic glass such as specific heat capacity, the difference between the actual temperature k1 and the process temperature k2 within the preset time period t can also be calculated, or the difference between the actual temperature k1 and the process temperature k2 within the preset time period t can be obtained by statistics and fitting in combination with the measurement of the actual temperature k1 in the heating chamber. In this embodiment, the detection of the mass q can be obtained directly by a pressure sensor, or indirectly by other types of sensors combined with calculations, which is not specifically limited in the present invention.

[0061] Furthermore, in order to reduce the deformation of the photovoltaic glass after it leaves the heating chamber, the present invention adds a shaping device 4 between the heating device 1 and the cooling device 2. The shaping device 4 is composed of an air jet pipe and an electromagnetic valve, and is controlled by a PLC for air jet cooling. The air jet pipe is arranged between the heating chamber and the wind grid of the heating device 1. When the photovoltaic glass is about to be moved out of the heating chamber, the PLC calculates the air jet time and air jet volume according to the time and length of the photovoltaic glass leaving the furnace, and realizes the air jet cooling operation by controlling the switch of the electromagnetic valve. In this way, the temperature of the photovoltaic glass can be quickly reduced to a value that is not easy to deform, ensuring that the photovoltaic glass is not easy to warp during transportation and cooling, thereby ensuring the yield and flatness of the photovoltaic glass.

[0062] Preferably, in this embodiment, the heating assembly includes a plurality of furnace wires, which can generate heat when current passes through the furnace wires, thereby respectively increasing the actual temperature k1 at different positions in the heating chamber. The furnace wires are connected to solid-state relays, and the solid-state relays are connected to fuses. The solid-state relay can accurately control the current on and off of the heating furnace wires. Compared with traditional mechanical relays, solid-state relays have higher switching speeds and longer service life, and there is no mechanical wear and arc generation, thereby improving the reliability and stability of the system. When a short circuit fault occurs in the heating assembly or circuit, the current flowing through the fuse will increase sharply, exceeding the rated current of the fuse, causing the fuse to melt quickly and cut off the circuit, thereby protecting the entire heating device 1 from damage.

[0063] In addition, a plurality of mutual inductors are also provided in the heating device 1, and the mutual inductors can detect the current between each furnace wire and the corresponding solid-state relay, or the current between each solid-state relay and the corresponding fuse. In other words, the mutual inductor can detect the current state of the heating component in real time, and once an abnormal current is found, such as no current, excessive current, continuous current, etc., the signal is immediately transmitted to the control component. The control component determines the fault type of the heating component based on the received signal, and displays the fault name and location on the operating table, and sends an alarm signal at the same time, so as to facilitate timely and accurate maintenance.

[0064] The present invention also provides a photovoltaic glass tempering method, which is applied to the photovoltaic glass tempering production line mentioned above. Specifically, the photovoltaic glass tempering method comprises:

[0065] S1. Obtaining the actual temperature k1 in the heating chamber within a preset time period t and the number n and / or mass q of photovoltaic glasses entering the heating chamber.

[0066] Specifically, in step S1, by setting a detection device 3 at the entrance of the heating chamber or setting a detection device 3 upstream of the heating device 1, using a photoelectric sensor, a pressure sensor, a capacitive sensor or other sensor, the quantity n or the quality q can be directly detected, or calculated with other measurable parameters such as specific heat capacity. The actual temperature k1 in the heating chamber can be directly measured by a thermocouple or the like.

[0067] S2. Adjust the actual temperature k1 in the heating chamber according to the quantity n and / or mass q of photovoltaic glasses entering the heating chamber within a preset time period t, and / or adjust the quantity n and / or mass q of photovoltaic glasses entering the heating chamber within a preset time period t according to the actual temperature k1 in the heating chamber.

[0068] In step S2, the heating power w of the heating component and the quantity n and / or quality q of photovoltaic glass that the transmission device can transport within the preset time period t can be selectively adjusted according to the difference between the actual temperature k1 and the process temperature k2 within the preset time period t.

[0069] Specifically, the difference between the actual temperature k1 and the process temperature k2 within the preset time period t can be obtained in a statistical manner. Exemplarily, the number n of photovoltaic glasses entering the heating chamber within the preset time period t is first set to a first preset value, and then the actual temperature k1 in the heating chamber at this time is measured, and compared with the process temperature k2 to obtain a first difference. Then, the number n of photovoltaic glasses entering the heating chamber within the preset time period t is set to a second preset value, and the actual temperature k1' in the heating chamber at this time is measured, and compared with the process temperature k2 to obtain a second difference. By continuously changing the number n of photovoltaic glasses entering the heating chamber within the preset time period t, the difference between the number n and the actual temperature k1 and the process temperature k2 can be statistically obtained.

[0070] For example, taking a 54-meter tempering furnace (i.e., the above-mentioned heating device 1) as an example, the current conventional photovoltaic glass length is 2272mm, and the minimum spacing is 100mm. A maximum of 22 photovoltaic glasses can be placed in the tempering furnace, which is a full-load state. According to the best tempering quality under this state, the difference between the actual temperature k1 and the process temperature k2 is obtained, and the main temperature table is compiled. Then, the distance between the glasses is increased, the number of glasses in the furnace is reduced, and the heating power w is adjusted. Under the best tempering quality state, the law of the difference between the actual temperature k1 and the process temperature k2 corresponding to the number n of 1-21 is obtained.

[0071] Of course, in some other embodiments, the law of the mass q of the photovoltaic glass entering the heating chamber within the preset time period t and the difference between the actual temperature k1 and the process temperature k2 can also be obtained in a similar manner, which will not be repeated in the present invention.

[0072] S3, inputting the photovoltaic glass into the heating chamber for heating, and cooling the glass after heating to achieve tempering.

[0073] After the number n and / or mass q of photovoltaic glass entering the heating chamber within the preset time period t and the actual temperature k1 in the heating chamber are matched, the heating treatment can be performed while the actual temperature k1 is the same as the process temperature k2. After the heating treatment, the cooling treatment is performed to complete the tempering treatment.

[0074] Through the above-mentioned photovoltaic glass tempering method, it can be ensured that the actual temperature k1 is the same as the process temperature k2, so that the photovoltaic glass can be heated to the optimal temperature and then cooled, thereby achieving a tempering process with a higher yield rate and avoiding the occurrence of white fog, warping and other phenomena.

[0075] Optionally, in this embodiment, the spacing s between two adjacent photovoltaic glasses can also be adjusted by the spacing adjustment component, thereby adjusting the number n of photovoltaic glasses that the transmission device can transport within a preset time period t. Of course, the spacing adjustment component can also ensure the uniformity and consistency of the spacing s, so that the actual temperature k1 in the heating chamber has a smaller fluctuation value, ensuring that the actual temperature k1 is the same as the process temperature k2. Figure 2 As shown, the transmission device includes three transmission rollers 51, and the speeds of the three transmission rollers 51 can be set to a constant value, and the spacing s after the photovoltaic glass is gathered on the loading platform 52 can be adjusted by a spacing adjustment component.

[0076] Of course, in some other embodiments, similar technical effects can be achieved by adjusting the moving speed of the photovoltaic glass.

[0077] Furthermore, in order to reduce the deformation of the photovoltaic glass after it leaves the heating chamber, the photovoltaic glass is subjected to shaping and cooling when it leaves the heating chamber, and the shaping and cooling is achieved by the above-mentioned shaping device 4. When the photovoltaic glass is about to be moved out of the heating chamber, the PLC calculates the jet time and jet volume according to the time and length of the photovoltaic glass, and realizes the jet cooling operation by controlling the switch of the solenoid valve. In this way, the temperature of the photovoltaic glass can be quickly reduced to a value that is not easy to deform, ensuring that the photovoltaic glass is not easy to warp during transportation and cooling, thereby ensuring the yield and flatness of the photovoltaic glass.

[0078] Next, a more specific example is used to introduce how to summarize the difference between the actual temperature k1 and the process temperature k2 within the preset time period t. It should be noted that in the existing tempering process, the photovoltaic glass in the heating chamber of the heating device 1 sequentially undergoes three different stages: initial heating, middle heating and late heating. In each stage, the photovoltaic glass moves to a different position (also called a zone, partition, etc.) in the heating device 1.

[0079] Exemplarily, in this embodiment, the heating device 1 includes 9 partitions, each of which is provided with a heating chamber and a heating assembly, which can respectively achieve different temperatures, so that the photovoltaic glass undergoes a "climbing type" temperature curve, a heating process from low to high temperature, and realizes the treatment of heating-softening-insulation. Among them, the 1st to 3rd partitions belong to the initial heating stage, the 4th to 6th partitions belong to the middle heating stage, and the 7th to 9th partitions belong to the late heating stage, and for each stage or partition, the photovoltaic glass has a different process temperature k2. Therefore, for each partition, it is possible to summarize the difference law between the actual temperature k1 and the process temperature k2 within the preset time period t.

[0080] When the photovoltaic glass is in the initial stage of heating, if the actual temperature k1 is lower than the process temperature k2, the deformation state of the photovoltaic glass is that the two sides are warped (separated from the ceramic roller used to transport the photovoltaic glass in the heating device 1), and the middle part of the photovoltaic glass is close to the surface of the ceramic roller, which makes it easy to produce white fog defects in the middle part. If the actual temperature k1 is higher than the process temperature k2, the temperature of the photovoltaic glass will rise unevenly along the conveying direction, causing the head of the photovoltaic glass to curl easily, which will make it difficult to flatten the photovoltaic glass in the subsequent stage, resulting in warping.

[0081] When the photovoltaic glass is in the middle of heating, if the actual temperature k1 is lower than the process temperature k2, the stress of the photovoltaic glass will relax, resulting in a low stress defect. If the actual temperature k1 is higher than the process temperature k2, the photovoltaic glass will be easily deformed, and the warping generated in the 1st to 3rd partitions will be further enlarged.

[0082] When the photovoltaic glass is in the late stage of heating, it is in the heat preservation stage and the heat absorption of the photovoltaic glass is small. If the actual temperature k1 is lower than the process temperature k2, the surface temperature of the photovoltaic glass will be lower when it comes out of the furnace, resulting in low four-point bending strength and further low stress. If the actual temperature k1 is higher than the process temperature k2, the photovoltaic glass will continue to absorb heat and strain, resulting in a large degree of warping at the edge after it comes out of the furnace, and the size of the glass will be larger.

[0083] Moreover, in any of the above-mentioned partitions, due to the setting mode of the heating assembly, there will be certain differences in the heating effect in the vertical direction in each partition. Exemplarily, the heating mode of the upper part of the partition is mainly radiation, and the lower part is mainly conduction. The heating assembly also includes a radiation plate, and the radiation plate and the ceramic roller are both arranged above the furnace wire, resulting in a higher actual temperature k1 in the upper part of the partition, and the upper surface of the photovoltaic glass that mainly receives the heat from the upper part of the partition has a faster heating rate, while the lower surface has a slower heating rate. In other words, in each partition, for the upper and lower parts of the partition, the difference between the actual temperature k1 and the process temperature k2 in the preset time period t can also be summarized and formed. Based on the consideration of symmetrical and balanced heating of photovoltaic glass from top to bottom, it is necessary to reasonably set the position of the furnace wire in each partition, and control the heating power of the furnace wires at different positions respectively, so as to set the temperature of the lower part to be slightly higher than that of the upper part.

[0084] It should be noted that, in some embodiments, the heating device 1 may be composed of a plurality of furnace bodies connected, each furnace body is formed with a heating cavity, and a heating component is respectively provided, and the heating component can at least heat the upper and lower parts of each heating cavity separately. In some embodiments, the heating device 1 may also include only one furnace body, in which a plurality of heating cavities are formed, and a plurality of heating components are provided, and each heating component can heat the upper and lower parts of each heating cavity separately. Alternatively, in some other embodiments, the heating device 1 may also include only one furnace body, in which a heating cavity is formed, and different positions of the heating cavity can be heated by different heating components, thereby forming a plurality of heating areas, and the upper and lower parts of each heating area can be heated separately. In other words, the present invention does not specifically limit the number of partitions and how to form a plurality of partitions, as long as the photovoltaic glass can be made to go through the three stages of initial heating, intermediate heating and late heating in one or more heating cavities, and can be guided by the type of defects after tempering to summarize the difference between the actual temperature k1 and the process temperature k2 in the preset time period t, it belongs to the scope to be protected by the present invention.

[0085] Specifically, in the actual production process, as the photovoltaic glass constantly enters and leaves each partition, it will take away the heat in each partition, which will cause a deviation between the actual temperature k1 of the photovoltaic glass in each partition and the process temperature k2 it should be in, making the actual temperature k1 often lower than the process temperature k2. This will lead to a low yield rate of photovoltaic glass after tempering, and corresponding defects such as white fog and warping. According to the specific defects of the photovoltaic glass, it can be judged in which of the three stages above the photovoltaic glass has the phenomenon that the actual temperature k1 is lower than the process temperature k2, so as to adjust the actual temperature k1 of each partition accordingly, and summarize the difference between the actual temperature k1 and the process temperature k2 of the corresponding partition (including the upper or lower part of the partition).

[0086] For example, when the surface temperature and stress of the furnace are low, it means that the actual temperature k1 in the 8-9 partition is much lower than the process temperature k2 due to the high rate of heat removal by the photovoltaic glass. At this time, it is necessary to increase the overall heating power in the 8-9 partition, or reduce the number n or mass q of photovoltaic glass input within the preset time t. In other words, in the current 8-9 partition, the actual temperature k1 is much lower than the process temperature k2, and the operator can correct the difference between the actual temperature k1 and the process temperature k2 in the 8-9 partition accordingly.

[0087] When the middle part of the photovoltaic glass has a white fog defect, it means that the actual temperature k1 of the upper part of the 1 to 3 partitions is low, and the actual temperature k1 of the lower part is high. At this time, it is necessary to increase the heating power w in the upper part of the 1 to 3 partitions and reduce the heating power w in the lower part of the 1 to 3 partitions. In other words, in the current 1 to 3 partitions, the actual temperature k1 of the upper part of the partition is lower than the process temperature k2, and the actual temperature k1 of the lower part of the partition is higher than the process temperature k2. The operator can correct the difference between the actual temperature k1 and the process temperature k2 in the upper and lower parts of the 1 to 3 partitions respectively.

[0088] When the edge of the photovoltaic glass has a white fog defect, it means that the actual temperature k1 of the lower part of the 1 to 3 partitions is low, and the actual temperature k1 of the upper part is high. At this time, it is necessary to increase the heating power w in the lower part of the 1 to 3 partitions and reduce the heating power w in the upper part of the 1 to 3 partitions. In other words, in the current 1 to 3 partitions, the actual temperature k1 of the lower part of the partition is lower than the process temperature k2, and the actual temperature k1 of the upper part of the partition is higher than the process temperature k2. The operator can correct the difference between the actual temperature k1 and the process temperature k2 in the upper and lower parts of the 1 to 3 partitions respectively.

[0089] When the photovoltaic glass has the defect of bending upward, it means that the actual temperature k1 of the lower part of each partition is relatively low, resulting in a large temperature difference between the actual temperature k1 of the upper and lower parts. Therefore, it is necessary to increase the heating power w in the lower part or reduce the heating power w in the upper part. On the contrary, when the photovoltaic glass has the defect of bending downward, it means that the actual temperature k1 of the upper part of each partition is relatively low. Therefore, it is necessary to increase the heating power w in the upper part or reduce the heating power w in the lower part. The operator can modify the difference between the actual temperature k1 and the process temperature k2 of the upper and lower parts of each partition according to whether the defect is bending upward or bending downward. By way of example, in this embodiment, every 2°C adjustment can control a 1mm bending change.

[0090] When the defect of excessive warping occurs, it means that the actual temperature k1 in the upper part of the 1 to 4 partitions is high, or the actual temperature k1 in the upper part of the 1 to 9 partitions is high. At this time, the defect can be solved by reducing the heating power w in the upper part of the 1 to 4 partitions, or reducing the heating power w in the upper part of the 1 to 9 partitions. It should be noted that at the beginning of heating, the temperature of the surface and center layer of photovoltaic glass is low, the heat absorption is large, and the temperature fluctuation range is also large. Due to the certain thickness difference of the glass plate surface, the thin points absorb less heat and the thick points absorb more heat, which leads to large deformation and warping of the glass. After passing through the 4th partition, it is basically formed and basically difficult to correct. Therefore, it is preferred to adjust the actual temperature k1 in the upper part of the 1 to 4 partitions.

[0091] The operator can comprehensively consider whether there are defects such as warpage, white fog, bending, etc., and selectively adjust the heating power w in the upper part of the 1 to 4 partitions or the 1 to 9 partitions, and then correct the difference between the actual temperature k1 and the process temperature k2 in the upper part of the 1 to 4 partitions, or the difference between the actual temperature k1 and the process temperature k2 in the upper part of the 1 to 9 partitions. For example, in this embodiment, every 5°C-10°C adjustment can reduce the warpage by 0.1mm.

[0092] When the defects of downward bending and warping occur at the same time, it is preferred to solve the defect of downward bending only by controlling the actual temperature k1. At this time, the defect of warping can be corrected by jet cooling in the subsequent shaping cooling.

[0093] It should be noted that the main way to increase the actual temperature k1 is to increase the set temperature of each partition, thereby increasing the heating power w of the heating component at a specific position. For example, when the actual temperature k1 of the upper part of the first partition needs to be increased, by modifying the set temperature value of the upper part of the first partition in the tempering equipment to increase it, the heating power w of part of the furnace wire can be correspondingly increased, thereby increasing the actual temperature k1 of the upper part of the first partition. Conversely, when the actual temperature k1 needs to be reduced, the set temperature value of the upper part of the first partition in the tempering equipment can also be modified to reduce it.

[0094] More specifically, taking the tempering of photovoltaic glass with a thickness of 1.6mm as an example, the upper set temperature of the first partition (the higher the set temperature, the greater the heating power w; the lower the set temperature, the smaller the heating power w) is 520~550℃, and the lower set temperature is 530~560℃; the upper and lower set temperatures of the second partition are both 565~595℃; the upper set temperature of the third partition is 600~630℃, and the lower set temperature is 605~635℃; the upper set temperature of the fourth partition is 635~655℃, and the lower set temperature is 6 The upper temperature of the 5th partition is set at 660~670℃, and the lower temperature is set at 660~680℃; the upper temperature of the 6th partition is set at 670~680℃, and the lower temperature is set at 680~690℃; the upper temperature of the 7th partition is set at 680~685℃, and the lower temperature is set at 690~700℃; the upper temperature of the 8th partition is set at 685℃, and the lower temperature is set at 700℃; the upper temperature of the 9th partition is set at 685~675℃, and the lower temperature is 690~700℃.

[0095] For photovoltaic glass with a thickness of 2.0 mm, due to the increase in mass q, more heat is absorbed within the same preset time t, so the set temperature at the same position is higher than the set temperature when heating 1.6 mm photovoltaic glass. For example, for photovoltaic glass with a thickness of 2.0 mm, the set temperature of the upper part of the first partition is 540~570°C, and the set temperature of the lower part is 550~580°C; the set temperature of the upper part of the second partition is 575~605°C, and the set temperature of the lower part is 585~615°C; the set temperature of the upper part of the third partition is 610~640°C, and the set temperature of the lower part is 620~650°C. Please see Table 1 for more detailed temperature settings, which will not be explained in detail in the present invention.

[0096]

[0097] Table 1. Set temperature of each partition at different thicknesses

[0098] It should be noted that in the tempering process, the thinner the glass thickness, the lower the set heating temperature, the shorter the heating time, and the faster the glass advances. This means that the quantity n or quality q of the photovoltaic glass input within the above-mentioned preset time t has a lower limit value corresponding to the glass thickness. Therefore, when the quantity n or quality q of the photovoltaic glass input within the preset time t is close to the lower limit value, the operator can only adjust the set temperature of each partition. Of course, this lower limit value will also be affected by the production rhythm of upstream and downstream equipment, the production planning of tempering equipment, etc. in actual production. Therefore, the present invention does not make a specific limitation on this lower limit value, as long as high-quality tempering of photovoltaic glass can be achieved.

[0099] That is to say, according to the type and magnitude of tempering defects, it is possible to summarize the impact of the quantity n or mass q of photovoltaic glass input within the same preset time period t on the difference between the actual temperature k1 and the process temperature k2 in different partitions, thereby guiding the operator to adjust the set temperature in different partitions (including the upper and lower parts of the partition) accordingly according to the change in the quantity n or mass q of photovoltaic glass input within the preset time period t, thereby changing the heating power w for different partitions, and then changing the actual temperature k1 of different partitions to make them the same or close to the corresponding process temperature k2, thereby avoiding tempering defects such as white fog, bending, and warping.

[0100] Of course, on the other hand, when there are certain restrictions on the heating power w based on factors such as the optimal energy consumption ratio, the quantity n or mass q of the photovoltaic glass input within the preset time period t can also be changed accordingly, so that the actual temperature k1 in different partitions is the same or similar to the corresponding process temperature k2, and the occurrence of tempering defects such as white fog, bending, and warping can be avoided.

[0101] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A transmission device, characterized in that include: A transmission device, wherein the transmission device is capable of conveying photovoltaic glass so that the photovoltaic glass passes through a heating device (1) and a cooling device (2) of a photovoltaic glass tempering production line in sequence to achieve tempering treatment, and in the photovoltaic glass tempering production line, a shaping device (4) is further provided between the heating device (1) and the cooling device (2), and the shaping device (4) is capable of blowing air to cool the heated photovoltaic glass so as to stabilize its shape; A detection device (3), the detection device (3) being used to detect the quantity n and / or quality q of the photovoltaic glass input by the transmission device to the heating device (1) within a preset time period t, and the detection device (3) is signal-connected to at least one of the transmission device and the heating device (1); A control component is used to receive the signal of the detection device (3), and control the heating power w of the heating device (1), or control the speed of the transmission device for conveying the photovoltaic glass, and obtain the difference between the actual temperature k1 and the process temperature k2 corresponding to the quantity n and / or mass q of the photovoltaic glass input into the heating device (1) within a preset time period t in a statistical manner, so that the control component can adjust the heating power w of the heating device (1) according to the quantity n and / or mass q of the photovoltaic glass conveyed within the preset time period t, and the heating power w of the heating device (1) can adjust the actual temperature k1, or adjust the quantity n and / or mass q of the photovoltaic glass conveyed within the preset time period t according to the heating power w of the heating device (1), so that the actual temperature k1 and the process temperature k2 remain consistent.

2. The transmission device according to claim 1, characterized in that: The detection device (3) comprises at least one of a photoelectric sensor, a pressure sensor and a capacitive sensor, and the detection device (3) is arranged upstream of the heating device (1) or at the entrance of the heating device (1).

3. The transmission device according to claim 1, characterized in that: The transmission device also includes a spacing adjustment component, which is used to adjust the spacing s between two adjacent photovoltaic glasses.

4. Photovoltaic glass tempering production line, characterized in that: It comprises a heating device (1), a cooling device (2) and a transmission device as described in any one of claims 1 to 3, wherein the transmission device of the transmission device is arranged upstream of the heating device (1), the heating device (1) is arranged upstream of the cooling device (2), and the detection device (3) of the transmission device is used to detect the number n and / or quality q of the photovoltaic glass passing through the transmission device, and is connected to a signal of at least one of the heating device (1) and the transmission device.

5. The photovoltaic glass tempering production line according to claim 4, characterized in that: The heating device (1) comprises a plurality of furnace wires, the furnace wires being used to respectively increase the actual temperature k1 at different positions in the heating device (1), the furnace wires being connected to solid-state relays, and the solid-state relays being connected to fuses; The heating device (1) further comprises a plurality of mutual inductors, wherein the mutual inductors are used to detect the current between each of the furnace wires and the corresponding solid-state relay, and / or the mutual inductors are used to detect the current between each of the solid-state relays and the corresponding fuse.

6. A photovoltaic glass tempering method, applied to the photovoltaic glass tempering production line as claimed in claim 4 or 5, characterized in that: include: Obtaining the actual temperature k1 in the heating chamber within a preset time period t and the number n and / or mass q of photovoltaic glass entering the heating chamber; Adjusting the actual temperature k1 in the heating chamber according to the quantity n and / or mass q of the photovoltaic glass entering the heating chamber within a preset time period t, and / or adjusting the quantity n and / or mass q of the photovoltaic glass entering the heating chamber within a preset time period t according to the actual temperature k1 in the heating chamber; The photovoltaic glass is input into the heating chamber for heating, and is cooled after heating to achieve tempering. Furthermore, when the photovoltaic glass leaves the heating chamber, the photovoltaic glass is cooled to set its shape.

7. The photovoltaic glass tempering method according to claim 6, characterized in that: Also includes: The distance between two adjacent photovoltaic glasses is adjusted, and / or the speed at which the photovoltaic glasses enter the heating chamber is adjusted.

8. The photovoltaic glass tempering method according to claim 6, characterized in that: The photovoltaic glass undergoes three stages in the heating chamber: an initial heating stage, a middle heating stage and a late heating stage, and, When the photovoltaic glass has defects such as low surface temperature or low stress, increasing the actual temperature k1 of the photovoltaic glass at the location during the late heating process; or When the middle part of the photovoltaic glass has a white fog defect, the actual temperature k1 of the upper part of the photovoltaic glass at the initial stage of heating is increased, or the actual temperature k1 of the lower part of the photovoltaic glass at the initial stage of heating is decreased; or When the edge of the photovoltaic glass has a white fog defect, the actual temperature k1 of the lower part of the photovoltaic glass at the initial heating process is increased, or the actual temperature k1 of the upper part of the photovoltaic glass at the initial heating process is decreased; or, When the photovoltaic glass has an upward bending defect, the actual temperature k1 of the lower part of the heating chamber is increased, or the actual temperature k1 of the upper part of the heating chamber is decreased; or, When the photovoltaic glass has a downward bending defect, the actual temperature k1 of the upper part of the heating chamber is increased, or the actual temperature k1 of the lower part of the heating chamber is decreased; or, When the photovoltaic glass has a defect of excessive warping, at least the actual temperature k1 of the upper portion of the photovoltaic glass during the initial heating stage and the middle heating stage is reduced.

9. The photovoltaic glass tempering method according to claim 8, characterized in that: The heating power w of the heating chamber is adjusted according to the number n and / or the mass q of the photovoltaic glass, so as to correspondingly adjust the actual temperature k1 of the upper and / or lower part of the heating chamber.

Images