Photo-thermal backboard flatness detection device and detection method thereof

Abstract

The invention discloses a photo-thermal backboard flatness detection device and a detection method thereof, and belongs to the technical field of measuring equipment, the photo-thermal backboard flatness detection device comprises a photo-thermal backboard, a substrate and a frame, the frame comprises a rectangular ring frame, the ring frame is provided with two rib plates at the trisection positions of the left and right extending long edges, and the two rib plates are connected with the substrate. Connecting bases are installed in the middles of the rib plates, and first supporting plates extending horizontally are installed in the middles of the two rib plates correspondingly. Through the design of the photo-thermal back plate, the bearing seat, the flatness detection module and the tension bracket, the frame with high structural strength is provided for the photo-thermal back plate, and the flatness detection module detects the flatness of the frame by taking the support plate of the frame as a reference point before the substrate and the photovoltaic sheet are mounted, so that the flatness detection efficiency is improved. And the tension bracket is used for applying an acting force opposite to the bending direction to the bending position of the frame, so that immediate flattening is carried out.

Description

Technical Field

[0001] The present invention belongs to the technical field of measuring devices, and particularly relates to a device and method for detecting the flatness of a photothermal backplane. Background Art

[0002] The photothermal backplane is a component of a photovoltaic module and is installed on the outermost layer of the photovoltaic cells. It uses a substrate and a frame to provide protection for the internal photovoltaic cells and circuits. Specifically, in the production of photovoltaic modules, the surface flatness of the photovoltaic module is an important parameter and needs to meet a certain range to avoid affecting product quality.

[0003] The existing Chinese invention patent with the publication number CN115962738A discloses that by setting a sponge wheel, a receiver, a laser emitter, a controller, and an alarm, when the photovoltaic module is being conveyed, the front and back surfaces of the photovoltaic module will respectively come into contact with the outer surfaces of the two sponge wheels. When the outer surface of the photovoltaic module is curved, the outer surface of the photovoltaic module will squeeze and push the sponge wheel, thereby detecting the flatness of the photovoltaic panel; in actual production, the flatness of the photovoltaic module is mainly affected by the photothermal backplane. After potting and forming, flatness detection is carried out. Due to the hard and brittle characteristics of the photovoltaic module itself, flatness repair is relatively difficult. Even if the flatness is detected to be unqualified, there is no remedy, resulting in a low finished product pass rate and increased costs. In view of this, a device and method for detecting the flatness of a photothermal backplane are provided. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned disadvantages of the prior art and provide a device and method for detecting the flatness of a photothermal backplane.

[0005] The technical solution adopted to solve the above technical problem is as follows: A device for detecting the flatness of a photothermal backplane, comprising: A photothermal backplane, including a substrate and a frame. The frame includes a rectangular ring frame. Two rib plates are provided at the one-third points of the long sides extending left and right of the ring frame. A connecting seat is installed in the middle of the rib plates. Horizontally extending support plates one are respectively installed in the middle of the two rib plates. Horizontally arranged support plates two are installed at the joints between the ring frame and the ends of the rib plates. Horizontally arranged support plates three are respectively installed at the bent corners and the midpoints of the short sides extending front and back of the ring frame; A bearing seat, which includes a bottom block. A long guide rod is installed on the top surface of the bottom block. The connecting seat is lapped on the top of the bottom block. A jack is provided at the position of the connecting seat corresponding to the long guide rod. A compression nut is provided above the long guide rod where it is located on the connecting seat; Flatness detection module, the flatness detection module includes a distance sensor 1 that is at the same distance from the top surfaces of two support plates 1 respectively, a distance sensor 2 that is at the same distance from the top surfaces of four support plates 2 respectively, and a distance sensor 3 that is at the same distance from the top surfaces of six support plates 3 respectively; Tension frame, the tension frame is located at the corner position of the ring frame. The tension frame includes a group frame and a hanging frame. The protruding part at the upper end of the hanging frame is at the same height as the horizontal center line of the ring frame. The hanging frame connecting joint assembly can horizontally move and be clamped in the middle groove of the ring frame. A power assembly is fixedly installed at the lower end of the hanging frame. A pressure sensing module is installed between the end of the power assembly and the group frame. The power assembly drives the hanging frame to slide vertically along the group frame.

[0006] Furthermore, it includes a circulation pipe group and a power assembly. The power assembly includes a sleeve and a sliding rod. The hanging frame is fixedly connected to the sleeve. A piston is installed in the middle of the sliding rod. The sliding rod is fixedly connected to the group frame. The piston divides the sleeve into a first hydraulic chamber and a second hydraulic chamber. The circulation pipe group includes a pump. The outlet end of the pump is installed with an output pipe. The inlet end of the pump is installed with a return pipe. The output pipe is connected to a lower output branch pipe and an upper output branch pipe through a first reversing valve. The return pipe is connected to a lower return branch pipe and an upper return branch pipe through a second reversing valve. The lower output branch pipe and the lower return branch pipe are communicated with the bottom of the second hydraulic chamber. The upper output branch pipe and the upper return branch pipe are communicated with the top of the first hydraulic chamber.

[0007] Through the above technical solution, to assist the power assembly to drive the up and down sliding of the tension frame. When the hanging frame needs to move upward, the pump works. The first reversing valve conducts the output pipe and the upper output branch pipe, and the second reversing valve conducts the return pipe and the lower return branch pipe. The oil in the second hydraulic chamber is pumped out and pumped into the first hydraulic chamber. Then the sleeve can be pushed up by the oil pressure. The pump can use a simple one-way pump with simple maintenance and low use cost.

[0008] Furthermore, the piston is axially provided with communication holes that communicate the first hydraulic chamber and the second hydraulic chamber. There are two communication holes, and a first tapered rod and a second tapered rod are respectively slidably installed in the communication holes. The first tapered rod has a shape that is wider at the top and narrower at the bottom. The second tapered rod has a shape that is narrower at the top and wider at the bottom. The two communication holes are respectively adapted to the shapes of the first tapered rod and the second tapered rod. Elastic members are installed between the large-diameter ends of the first tapered rod and the second tapered rod and the inner wall of the communication holes. The small-diameter ends of the first tapered rod and the second tapered rod protrude a certain distance from the piston end face.

[0009] Through the above technical solution, to achieve the rapid leveling of the ring frame, when the corners of the ring frame are upturned, the power components at the corresponding positions apply a downward pressure to the ring frame. When the casing descends close to the lower dead center, the second taper rod is extruded downward to open the communication hole, and the oil fluid inside the second hydraulic chamber flows back into the first hydraulic chamber to make the casing ascend until the second taper rod disengages from the inner wall of the top of the casing and seals the communication hole again. The ascending casing will immediately stop ascending and resume descending. During the process of the changing direction of the casing travel, due to inertia, the casing will impact the ring frame, eliminating the internal stress of the ring frame and quickly repairing the flatness of the ring frame.

[0010] Further, it includes a joint component. The joint component includes a horizontal rod and a swing plate. A frustum portion is provided in the middle of the horizontal rod. A pressing block is installed at the position of the swing plate facing the frustum portion. When the swing plate drives the pressing block to press down the frustum portion, it can push the horizontal rod to translate. When the horizontal rod translates, it can drive the hanging bracket to be clamped in the middle groove.

[0011] Through the above technical solution, to achieve the horizontal sliding drive of the hanging bracket, the tension bracket has a bottom frame. The bottom frame is in the same straight line as the horizontal rod. The frustum portion narrows at the end close to the ring frame. When the pressing block presses down, it pushes the horizontal rod away from the ring frame by squeezing the frustum portion. The group frame is directly connected to the horizontal rod. When the group frame is driven by the horizontal rod to slide, the clamping of the hanging bracket and the ring frame can be completed.

[0012] Further, the joint component includes a first guide seat and a second guide seat. The first guide seat is hinged and assembled with the swing plate. An opening-downward clamping plate is installed at the position of the swing plate facing the second guide seat. The second guide seat is provided with a cylindrical part that cooperates with the clamping plate. A handle is fixedly installed on the top surface of the end of the swing plate away from the first guide seat.

[0013] Through the above technical solution, to ensure the stable clamping of the hanging bracket and the ring frame during the test, a clamping plate is installed at the free end of the swing plate. A horizontally protruding cylindrical part is provided on the upper part of the second guide seat. The clamping plate can be clamped outside the cylindrical part when it is pressed down. The pressing block stays at the position of pressing the frustum portion, ensuring that the hanging bracket can only slide up and down and cannot slide horizontally and fall off.

[0014] Further, the pump is a one-way piston pump. The pump is installed at the end of the swing plate close to the first guide seat. A pressure rod is hinged and installed above the swing plate. The pressure rod is hinged and assembled with the pump.

[0015] Through the above technical solution, to achieve the stable pumping of the oil fluid, the pump can be a mechanical pump. One end of the pressure rod is rotatably connected to the swing plate, driving the plunger in the vertically installed pump to reciprocate, completing manual one-way pumping.

[0016] Further, an installation cavity for arranging a power assembly is provided in the middle of the group frame, a scale is provided on the vertical side wall of the hanging frame, and an indicating mark is provided on one side of the group frame corresponding to the scale.

[0017] Through the above technical solution, to prevent the detection accuracy caused by the damage of the electronic equipment of the flatness detection module, when the hanging frame is clamped at the corner position of the ring frame, the hanging frame will have an initial position, which can be indicated by the indicating mark in combination with the scale. After the protruding part is inserted into the middle groove, if the hanging frame slides up and down, the sliding distance of the hanging frame is the initial flatness deviation value at the corner position.

[0018] Further, the bearing seat includes an intermediate plate and a top plate. The intermediate plate and the top plate are respectively fixed to the top and bottom ends of the connecting seat. A screw rod is fixedly installed on the top surface of the intermediate plate. The screw rod penetrates through the connecting seat and the top plate and is screwed with a self-locking nut above the top plate.

[0019] Through the above technical solution, to facilitate the hoisting of the frame of the solar heat backplane, an intermediate plate is installed at the bottom of the connecting seat, and the screw rod passes through the connecting seat and is connected to the top plate above. The top plate is used to connect with the steel cable of the hoisting equipment, and the hoisting position and the stress position are not directly set on the frame.

[0020] Further, a short guide rod is installed at the bottom of the intermediate plate, a vertical hole matching the short guide rod is provided on the top surface of the bottom block, a resisting seat is provided at the position of the screw rod corresponding to the top plate, the resisting seat is inserted through the screw rod, the upper convex part of the resisting seat is in sliding contact with the vertical side wall of the connecting seat, and a lifting rod is provided at the top of the resisting seat.

[0021] Through the above technical solution, to improve the hoisting accuracy of the frame of the solar heat backplane, when the intermediate plate descends, the short guide rod will be inserted into the vertical hole, and it can be directly lowered to the top of the bottom block to complete the centered horizontal overhead installation. During hoisting, the lifting rod extends obliquely, providing sufficient operating space for the steel cable to be tied, and the resisting seat on the opposite side of the lifting rod will press against the vertical side wall of the connecting seat.

[0022] A method for detecting the flatness of a solar heat backplane includes the following steps: When placing the frame of the solar heat backplane, install an intermediate plate at the bottom end of the connecting seat. The intermediate plate installs a top plate at the top end of the connecting seat through a screw rod. The lifting rod of the top plate is connected to the hoisting steel cable. The frame is lifted by a hoisting device and horizontally centered and placed on the top of the bottom block under the guidance of the long guide rod and the short guide rod; When detecting the static flatness of the frame, one of the two distance sensors irradiates the center position of the top surface of the first support plate and ensures the same distance. At the same time, the distance between the second distance sensor and the top surfaces of the four second support plates is the same, and the distance between the third distance sensor and the top surfaces of the six third support plates is the same. In the static state, by collecting the height data of the corners of the ring frame, the three equal division points of the long side of the ring frame, the midpoint of the short side of the ring frame, and the midpoint of the rib plate, the flatness of the solar heat backplane is calculated; When detecting the dynamic flatness of the frame, the pressing block squeezes the frustum part to make the horizontal rod slide away from the center of the circular frame corner, thereby driving the hanging bracket to be stuck into the middle groove of the circular frame. During the torsional resistance test, the pump sends out the oil in hydraulic chamber one through the upper return branch pipe and the return pipe, and conveys it into hydraulic chamber two through the output pipe and the lower output branch pipe, so that the sleeve drives the hanging bracket to move downward to apply a downward pressure on the circular frame corner position. Similarly, the pump sends out the oil in hydraulic chamber two through the lower return branch pipe and the return pipe, and conveys it into hydraulic chamber one through the output pipe and the upper output branch pipe, so that the sleeve drives the hanging bracket to move upward to apply an upward pressure on the circular frame corner position, and the pressure sensing module detects the magnitude of the applied pressure. After the torsional resistance test of the frame, repair the static flatness deviation of the frame. The tension frame applies a reverse pressure in the deviation direction of the frame. When the sleeve reaches the limit position, the first or second taper rod will contact the sleeve and slide under pressure, making the blocked communication hole conductive, so that the sleeve releases pressure and resets until the first or second taper rod blocks the communication hole again. Shake the frame reciprocally to eliminate stress and quickly complete the flatness repair.

[0023] The beneficial effects of the present invention are as follows: Through the design of the photothermal backplane, the bearing seat, the flatness detection module and the tension frame, the present invention provides a frame with relatively high structural strength for the photothermal backplane. Before installing the substrate and the photovoltaic cells, the flatness detection module uses the support plate of the frame as a reference point to detect the flatness of the frame, and uses the tension frame to apply a force opposite to the bending direction on the bent position of the frame for immediate flattening. Through the design of the circulation pipe group and the power assembly, when flattening the bent frame, the circulation pipe group is used to control the flow direction of the oil, so that the sleeve of the power assembly drives the hanging bracket to move in the opposite direction to the frame bend to flatten the frame, and the intermittent opening of the communication hole by the taper rod at the limit position of the sleeve enables the sleeve to quickly reciprocate within a small range, eliminating the internal stress of the circular frame and reducing the springback after the circular frame is flattened. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the structural schematic diagram of the present invention; Figure 2 is the top view schematic diagram of the present invention; Figure 3 is the front view of the present invention; Figure 4 is the exploded schematic diagram of the middle part of the bearing seat and the photothermal backplane of the present invention; Figure 5 is the assembled schematic diagram of the middle part of the bearing seat and the photothermal backplane of the present invention; Figure 6 is the state schematic diagram among the tension frame, the circulation pipe group and the power assembly of the present invention Figure 1 ; Figure 7 It is a schematic diagram of the state among the tension frame, the circulation pipe group and the power assembly of the present invention Figure 2 ; Figure 8 It is a sectional view of the tension frame, the circulation pipe group and the power assembly of the present invention; Figure 9 It is a structural diagram of the circulation pipe group and the power assembly of the present invention; Figure 10 It is a sectional view of the circulation pipe group and the power assembly of the present invention; Figure 11 It is a schematic diagram of the state when the power assembly runs to the top dead center and the bottom dead center positions of the present invention; Figure 12 It is Figure 11 a structural diagram at position a in

[0025] Reference numerals: 1, bed frame; 2, bearing seat; 21, bottom block; 22, intermediate plate; 23, top plate; 24, screw rod; 25, long guide rod; 26, short guide rod; 27, lifting rod; 28, abutting seat; 3, solar heat back plate; 31, ring frame; 32, rib plate; 33, connecting seat; 34, first support plate; 35, second support plate; 36, third support plate; 37, middle groove; 4, flatness detection module; 41, first distance sensor; 42, second distance sensor; 43, third distance sensor; 5, joining component; 51, first guide seat; 52, second guide seat; 53, horizontal rod; 54, swing plate; 55, clamping plate; 56, handle; 57, frustum part; 58, pressing block; 6, circulation pipe group; 61, pump; 62, output pipe; 63, return pipe; 64, first reversing valve; 65, second reversing valve; 66, lower output branch pipe; 67, upper output branch pipe; 68, lower return branch pipe; 69, upper return branch pipe; 7, power assembly; 71, sleeve; 72, sliding rod; 73, piston; 74, first hydraulic cavity; 75, second hydraulic cavity; 76, first tapered rod; 77, second tapered rod; 78, communication hole; 79, elastic member; 8, tension frame; 81, bottom frame; 82, group frame; 83, installation cavity; 84, hanging frame; 85, scale; 9, pressure sensing module. Detailed implementation manners

[0026] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0027] As Figures 1 - 12As shown in the figure, this embodiment provides a device for detecting the flatness of a photothermal backplane. The photothermal backplane 3 is an important part of a photovoltaic module. Its main function is to be located on the outermost layer of the module, directly in contact with the external environment, playing a role in protecting internal components such as solar cells and EVA films, and being used for fixing to a photovoltaic support. Regarding the photothermal backplane 3, it consists of a substrate and a frame. Referring to Figure 1 and Figure 2 , a glass plate or other opaque plate is embedded in the frame as the substrate. Solar cells, EVA films and other materials are arranged on the upper surface of the substrate and then encapsulated with glue to form an integral photovoltaic panel; However, the substrate made of glass has high requirements for the flatness of the frame. If the flatness of the ring frame 31 is insufficient, the substrate will twist after installation, affecting the flatness of the entire photovoltaic panel, and may even cause excessive torsion of the substrate and stress breakage. Therefore, to ensure the flatness of the photothermal backplane 3, it is necessary to detect the flatness of the frame of the photothermal backplane 3 before manufacturing the photothermal backplane 3. When the flatness of the frame meets the requirements, the substrate and photovoltaic cells can be assembled, which can ensure the flatness of the finished product. If the flatness is detected after the photovoltaic cells are fixed with glue as a whole, it will be very difficult to correct the flatness defects, resulting in a decrease in the yield rate and an increase in cost. Therefore, a specific frame is designed, which includes a hollow ring frame 31. The corners of the rectangular ring frame 31 are set as rounded corners to increase the structural strength at the corner positions. Two rib plates 32 are provided at the one-third points of the long sides of the ring frame 31 extending left and right. The rib plates 32 play an effect of strengthening the middle section of the ring frame 31. In addition, it can provide an installation position for the connecting seat 33, and the connecting seat 33 is used to connect the photothermal backplane 3 to the photovoltaic support; At the same time, referring to Figure 2 and Figure 3 , horizontally extending first support plates 34 are respectively installed in the middle parts of the two rib plates 32. Horizontally arranged second support plates 35 are installed at the joints between the ring frame 31 and the ends of the rib plates 32. Horizontally arranged third support plates 36 are respectively installed at the bent corners and the midpoints of the short sides of the ring frame 31 extending front and back. These support plates (the first support plates 34, the second support plates 35 and the third support plates 36) are arranged at the corners of the ring frame 31, the one-third points of the long sides of the ring frame 31, the midpoints of the short sides of the ring frame 31 and the midpoints of the rib plates 32, are evenly distributed and have the same height as the ring frame 31 at that place, which is convenient for later drilling and installing the photovoltaic panel, and can also be used as a reference point for flatness detection; Regarding the bearing seat 2, referring to Figure 3 and Figure 4, the bearing seat 2 includes a bottom block 21 which is fixed on the top surface of the bed frame 1. Among them, long guide rods 25 are installed on the top surface of the bottom block 21. There are two long guide rods 25 which are vertically arranged. The connecting seat 33 is lapped on the top of the bottom block 21, so that the ring frame 31 can be horizontally erected on the top surface of the bed frame 1 for subsequent flatness detection. At the same time, jacks are provided at the positions of the connecting seat 33 corresponding to the long guide rods 25 for vertical guiding. And, a compression nut is provided above the connecting seat 33 on the long guide rod 25, so that the ring frame 31 can be firmly installed on the bed frame 1, so that the ring frame 31 will not be displaced during the subsequent detection process, resulting in a reduction in test accuracy; Regarding the flatness detection module 4, refer to Figure 1 , Figure 2 and Figure 3 , the flatness detection module 4 includes a distance sensor 41 which is at the same distance from the top surfaces of two first support plates 34 respectively, a distance sensor 42 which is at the same distance from the top surfaces of four second support plates 35 respectively, and a distance sensor 43 which is at the same distance from the top surfaces of six third support plates 36 respectively. The distance sensor 41, the distance sensor 42 and the distance sensor 43 adopt a laser rangefinder or an infrared distance sensor, and can be installed at the same horizontal height. Taking the center of the top surface of these support plates (the first support plate 34, the second support plate 35 and the third support plate 36) as the base point, the height data of the corners of the ring frame 31, the trisection points of the long sides, the midpoints of the short sides and the midpoints of the rib plates 32 are collected, so that the flatness data of the ring frame 31 can be quickly determined; Regarding the tension frame 8, refer to Figure 2 and Figure 6 , when the flatness of the ring frame 31 does not meet the specified range, the tension frame 8 is located at the corner position of the ring frame 31. And, the tension frame 8 includes a group frame 82 and a hanging frame 84. At the same time, the protruding part at the upper end of the hanging frame 84 is at the same height as the horizontal center line of the ring frame 31. The hanging frame 84 is connected to the engaging component 5 and can be horizontally moved and clamped in the middle groove 37 of the ring frame 31, so that the hanging frame 84 and the corner position of the ring frame 31 can be connected. After that, a power component 7 is fixedly installed at the lower end of the hanging frame 84. When the power component 7 is started, the power component 7 drives the hanging frame 84 to slide vertically along the group frame 82, so that the ring frame 31 can be repaired by applying forces in the opposite bending directions to the ring frame 31. For example, if the left side of the ring frame 31 sinks, the left side of the ring frame 31 can be pushed up and bent by using the two tension frames 8 on the left side. Because the ring frame 31 is made of a bendable and plastic material such as aluminum alloy, this reverse bending makes the ring frame 31 deform upward and return to flatness. At the same time, a pressure sensing module 9 is installed between the end of the power component 7 and the group frame 82. The reference value of the bending force required for different bending amplitudes can be preset. When the bending force detected by the pressure sensing module 9 reaches the repair force required for the sinking degree of the bend, the upward push can be stopped. By accumulating data during use and experiments, the ring frame 31 in different states can be repaired faster and more accurately.

[0028] The working principle of this embodiment is as follows: Lift the frame of the photothermal backplane 3, let the connecting seat 33 overlap and be guided down on the top of the bottom block 21, and then lock it with a compression nut to horizontally support the ring frame 31 on the top surface of the bed frame 1; Adjust the distance sensor one 41, the distance sensor two 42, and the distance sensor three 43 to the height where the horizontal center line of the ring frame 31 should be. Align the probes of the two distance sensors one 41 with the center points of the top surfaces of the two support plates one 34, align the probes of the four distance sensors two 42 with the center points of the top surfaces of the four support plates two 35, and align the probes of the six distance sensors three 43 with the center points of the top surfaces of the six support plates three 36 respectively to collect the height data of the corners, the trisection points of the long sides, the midpoints of the short sides, and the midpoints of the rib plates 32 of the ring frame 31, and compare the data with the height where the horizontal center line should be to obtain the flatness data; For the sunken position of the ring frame 31, snap the hanging bracket 84 at the corner of the sunken position of the ring frame 31, and the power assembly 7 pushes up the ring frame 31 through the hanging bracket 84 to bend and shape the ring frame 31. After shaping, continue to detect the height data of the ring frame 31 at this place until the ring frame 31 meets the flatness requirements.

[0029] In a further embodiment, to assist the power assembly 7 to realize the up and down sliding drive of the tension frame 8, refer to Figure 6 and design the circulation pipe group 6 and the power assembly 7. Among them, refer to Figure 9 and Figure 10 The power assembly 7 includes a sleeve 71 and a sliding rod 72. A piston 73 is installed in the middle of the sliding rod 72. The piston 73 divides the sleeve 71 into a first hydraulic chamber 74 and a second hydraulic chamber 75. And, refer to Figure 8 The lower end of the hanging bracket 84 is fixedly connected to the circumferential outer wall of the sleeve 71, and the sliding rod 72 is fixedly connected to the group frame 82; The circulation pipe group 6 includes a pump 61. The outlet end of the pump 61 is equipped with an output pipe 62, and the inlet end of the pump 61 is equipped with a return pipe 63. The pump 61 can push the hydraulic oil to flow between the output pipe 62, the return pipe 63, the first hydraulic chamber 74, and the second hydraulic chamber 75. Specifically, refer to Figure 8 and Figure 9 and Figure 10 The output pipe 62 is connected with a lower output branch pipe 66 and an upper output branch pipe 67 through a first reversing valve 64. The return pipe 63 is connected with a lower return branch pipe 68 and an upper return branch pipe 69 through a second reversing valve 65. The lower output branch pipe 66 and the lower return branch pipe 68 are communicated with the bottom of the second hydraulic chamber 75, and the upper output branch pipe 67 and the upper return branch pipe 69 are communicated with the top of the first hydraulic chamber 74; Among them, refer to Figure 11, when the hanger 84 needs to move upward, the pump 61 works. The first reversing valve 64 conducts the output pipe 62 and the upper output branch pipe 67, and the second reversing valve 65 conducts the return pipe 63 and the lower return branch pipe 68. The oil in the second hydraulic chamber 75 is pumped out and sent to the first hydraulic chamber 74, so that the casing 71 can be pushed upward by the oil pressure. Similarly, when the hanger 84 needs to move downward, the first reversing valve 64 conducts the output pipe 62 and the lower output branch pipe 66, and the second reversing valve 65 conducts the return pipe 63 and the upper return branch pipe 69. The oil in the first hydraulic chamber 74 is pumped out and sent to the second hydraulic chamber 75, so that the casing 71 can be pressed downward by the oil pressure. The pump 61 can use a simple one-way pump, which is simple to maintain and has a low use cost.

[0030] In a further embodiment, to quickly level the ring frame 31, when the bending amplitude of the ring frame 31 is large, referring to Figure 11 and Figure 12 , the piston 73 is axially provided with communication holes 78 that communicate the first hydraulic chamber 74 and the second hydraulic chamber 75. There are two communication holes 78, and a first tapered rod 76 and a second tapered rod 77 are respectively slidably installed. The first tapered rod 76 has a shape that is thick at the top and narrow at the bottom, and the second tapered rod 77 has a shape that is narrow at the top and thick at the bottom. The two communication holes 78 are respectively adapted to the shapes of the first tapered rod 76 and the second tapered rod 77. That is, the inner diameter of the communication hole 78 corresponding to the first tapered rod 76 is also thick at the top and narrow at the bottom, and the inner diameter of the communication hole 78 corresponding to the second tapered rod 77 is also narrow at the top and thick at the bottom. Elastic members 79 are installed between the large-diameter ends of the first tapered rod 76 and the second tapered rod 77 and the inner wall of the communication hole 78. The small-diameter ends of the first tapered rod 76 and the second tapered rod 77 protrude from the end face of the piston 73 by a certain distance. The elastic member 79 can be a straight spring, providing a pre-tightening pressure to ensure that the communication hole 78 is in a blocked state before the first tapered rod 76 and the second tapered rod 77 press against the inner wall of the casing 71; During use, referring to Figure 9 and Figure 11 the right half part, when the corner of the ring frame 31 warps upward, the power assembly 7 at the corresponding position applies a downward pressure to the ring frame 31. The second hydraulic chamber 75 is filled with oil to press down the casing 71 together with the hanger 84, so that the ring frame 31 can be pressed and corrected. When the casing 71 descends close to the lower dead center, the second tapered rod 77 is squeezed downward to open the communication hole 78, and the first hydraulic chamber 74 and the second hydraulic chamber 75 are communicated. The oil inside the second hydraulic chamber 75 flows back to the first hydraulic chamber 74 to make the casing 71 ascend until the second tapered rod 77 disengages from the inner wall of the top of the casing 71 to block the communication hole 78 again. Because oil is continuously input into the second hydraulic chamber 75, the ascending casing 71 will immediately stop ascending and resume descending. During the process of the casing 71 changing its traveling direction, due to inertia, the casing 71 will generate an intermittent impact force on the ring frame 31. With the continuous downward pressure, the ring frame 31 with a large bending amplitude can be quickly leveled. Moreover, the internal stress of the ring frame 31 is eliminated, the springback after the shaping of the ring frame 31 is reduced, and the flatness of the ring frame 31 is quickly restored. Similarly, referring toFigure 9 and Figure 11 For the left half part, when the corner of the ring frame 31 collapses, the power component 7 at the corresponding position applies an upward force to the ring frame 31, and the reverse repair of the ring frame 31 can be completed.

[0031] In a further embodiment, to realize the horizontal sliding drive of the hanger 84, a specific configuration is provided. Refer to Figure 7 , which includes an engaging component 5. The engaging component 5 includes a horizontal rod 53 and a swing plate 54. A frustum portion 57 is provided in the middle of the horizontal rod 53. A pressing block 58 is installed at the position of the swing plate 54 facing the frustum portion 57. One end of the frustum portion 57 close to the ring frame 31 is narrower, and the end far from the ring frame 31 is wider. When the pressing block 58 is pressed down, the horizontal rod 53 can be pushed away from the ring frame 31 by squeezing the circumferential inclined surface of the frustum portion 57. The frame 82 is directly connected to the horizontal rod 53. Therefore, when the swing plate 54 drives the pressing block 58 to press down the frustum portion 57, it can push the horizontal rod 53 to translate. When the horizontal rod 53 translates, it can drive the hanger 84 to be clamped in the middle groove 37. Among them, the tension frame 8 has a bottom frame 81, and the bottom frame 81 is on the same straight line as the horizontal rod 53. A dovetail head is provided at the lower part of the frame 82, and the dovetail head can slide in the bottom frame 81. Refer to Figure 2 , the extension line of the horizontal rod 53 passes through the center of the fillet of the ring frame 31, ensuring that the frame 82 will slide along the radius of the fillet of the ring frame 31. And the lower part of the hanger 84 is slidably installed at the installation cavity 83 in the middle of the frame 82. When the frame 82 is driven by the horizontal rod 53 to slide, the hanger 84 can be synchronously slid and clamped into the middle groove 37 to complete the clamping of the hanger 84 and the ring frame 31. On the contrary, when it is necessary to release the ring frame 31, lift the pressing block 58 to disengage from the frustum portion 57, and the hanger 84 can slide freely to quickly complete the unlocking.

[0032] In a further embodiment, to ensure the stable clamping of the hanger 84 and the ring frame 31 during the test, refer to Figure 6 , Figure 7 and Figure 8The engaging assembly 5 comprises a guide seat 1 51 and a guide seat 2 52. The guide seat 1 51 is hingedly assembled with the swing plate 54. A card plate 55 with an opening downward is installed on the swing plate 54 opposite to the guide seat 2 52. The guide seat 2 52 is provided with a cylindrical member cooperating with the card plate 55. A card plate 55 is installed on the free end of the swing plate 54. A cylindrical member protruding in the horizontal direction is provided on the upper part of the guide seat 2 52. The card plate 55 can be pressed down to be stuck on the outer side of the cylindrical member to lock the free end of the swing plate 54. A handle 56 is fixedly installed on the top surface of the end of the swing plate 54 away from the guide seat 1 51. In this way, pressing down the handle 56 can ensure that the pressure block 58 is stationary in the position of the pressing cone portion 57, so that the position of the assembly frame 82 is fixed, so that the hanger 84 can only slide up and down but cannot slide horizontally to cause falling off, thereby ensuring the stability of the tension frame 8 in subsequent use. By lifting the handle 56 and manually pushing the tension frame 8 away from the ring frame 31, the unlocking can be completed, which is convenient to use.

[0033] In a further embodiment, a specific configuration is provided to achieve the pumping of oil, referring to Figure 6 , Figure 7 and Figure 8 The pumping device 61 adopts a mechanical one-way piston pumping device. The pumping device 61 is installed on the end of the swing plate 54 near the guide seat 51. The swing plate 54 is located above the pumping device 61 and is hingedly installed with a pressure rod. The pressure rod is hingedly assembled with the pumping device 61. One end of the pressure rod is rotatably connected to the swing plate 54. The free end of the pressure rod is manually pushed and pulled up and down, driving the plunger in the vertically installed pumping device 61 to slide back and forth, and continuously transporting the oil in the return pipe 63 to the output pipe 62 to complete manual one-way pumping.

[0034] In a further embodiment, in order to prevent the flatness detection module 4 from being damaged and causing the detection accuracy to decrease, refer to Figure 6 , Figure 7 and Figure 9 A mounting cavity 83 for arranging the power assembly 7 is provided in the middle of the assembly frame 82, and a scale 85 is opened on the vertical side wall of the bracket 84. An indicator mark is provided on one side of the assembly frame 82 corresponding to the scale 85. When the bracket 84 is clamped at the corner position of the ring frame 31, the bracket 84 will have an initial position, and this initial position can be indicated by the indicator mark and the scale 85. The sampling is performed by human eye observation or mechanical photography. Because the protrusion at the upper end of the bracket 84 is at the same height as the horizontal center line of the ring frame 31, if the bracket 84 slides up and down after the protrusion is clamped into the middle groove 37, the sliding distance of the bracket 84 is the initial flatness deviation value of the corner position. The redundant design of this test structure can be used as the reference data of the flatness detection module 4 to increase fault tolerance.

[0035] In a further embodiment, in order to facilitate the hoisting of the photothermal backplane 3, refer to Figure 5, the carrier base 2 includes an intermediate plate 22 and a top plate 23. The intermediate plate 22 and the top plate 23 are respectively fixed to the top and bottom ends of the connecting base 33, sandwiching the connecting base 33 between them. A screw rod 24 is fixedly installed on the top surface of the intermediate plate 22. The screw rod 24 passes through the connecting base 33 and the top plate 23 and is threadedly connected with a self-locking nut above the top plate 23, which can connect the connecting base 33, the intermediate plate 22 and the top plate 23 into a whole. The intermediate plate 22 is installed at the bottom of the connecting base 33, and is connected to the upper top plate 23 through the screw rod 24 passing through the connecting base 33. The top plate 23 is used to provide an installation position and is connected to the steel cable of the hoisting equipment. The intermediate plate 22 is padded at the bottom of the connecting base 33 for contacting the ground or the bottom block 21. The hoisting position and the stress position are not directly set on the solar heat backplane 3, which can reduce the wear or scratch of the solar heat backplane 3 caused by the disassembly and assembly of the steel cable during hoisting.

[0036] In a further embodiment, to improve the hoisting accuracy of the solar heat backplane 3, referring to Figure 4 and Figure 5 , a short guide rod 26 is installed at the bottom of the intermediate plate 22, and a vertical hole matching the short guide rod 26 is opened on the top surface of the bottom block 21. When the intermediate plate 22 descends, the short guide rod 26 will be inserted into the vertical hole, and it can be directly lowered to the top of the bottom block 21 to complete the centered horizontal overhead installation. Cooperating with the long guide rod 25 can increase the contact points between the bottom block 21 and the intermediate plate 22. And, a resisting seat 28 is provided at the position of the screw rod 24 corresponding to the top plate 23. The resisting seat 28 is inserted through the screw rod 24. The upper protrusion of the resisting seat 28 is in sliding contact with the vertical side wall of the connecting base 33. A lifting rod 27 is provided at the top of the resisting seat 28. During hoisting, the lifting rod 27 extends obliquely, providing sufficient operating space for the steel cable to be tied. The steel cable is installed at the position of the lifting rod 27 and lifted. The resisting seat 28 on the opposite side of the lifting rod 27 will press against the vertical side wall of the connecting base 33, offsetting the torsional component force in the horizontal direction when the lifting rod 27 is lifted, and ensuring the vertical direction of the force on the connecting base 33.

[0037] A method for detecting the flatness of a solar heat backplane includes the following steps: When placing the frame of the solar heat backplane 3, the intermediate plate 22 is installed at the bottom end of the connecting base 33, the intermediate plate 22 installs the top plate 23 at the top end of the connecting base 33 through the screw rod 24. The lifting rod 27 of the top plate 23 is connected to the hoisting steel cable. The frame of the solar heat backplane 3 is lifted by the hoisting equipment and horizontally centered and placed on the top of the bottom block 21 under the guidance of the long guide rod 25 and the short guide rod 26; When detecting the static flatness of the frame of the solar heat backplane 3, two distance sensors one 41 respectively irradiate the center position of the top surface of the support plate one 34 and ensure the same distance. At the same time, the distance between the distance sensor two 42 and the top surfaces of the four support plates two 35 is the same, and the distance between the distance sensor three 43 and the top surfaces of the six support plates three 36 is the same. In the static state, by collecting the height data of the corners of the ring frame 31, the three equal division points of the long side of the ring frame 31, the midpoint of the short side of the ring frame 31, and the midpoint of the rib plate 32, the flatness of the frame is calculated; When detecting the dynamic flatness of the frame of the photothermal backplane 3, the pressing block 58 squeezes the frustum 57 to make the horizontal rod 53 slide in the direction away from the center of the corner of the ring frame 31, thereby driving the hanger 84 to be stuck in the middle groove 37 of the ring frame 31. During the torsion test, the pumping device 61 is connected to the return pipe 63 through the upper return branch pipe 69 to extract the oil in the hydraulic chamber 1 74, and transports it to the hydraulic chamber 2 75 through the output pipe 62 and the lower output branch pipe 66, so that the sleeve 71 drives the hanger 84 to move downward to apply downward pressure on the corner position of the ring frame 31. Similarly, the pumping device 61 is connected to the return pipe 63 through the lower return branch pipe 68 to extract the oil in the hydraulic chamber 2 75, and transports it to the hydraulic chamber 1 74 through the output pipe 62 and the upper output branch pipe 67, so that the sleeve 71 drives the hanger 84 to move upward to apply upward pressure on the corner position of the ring frame 31, and the pressure sensor module 9 detects the size of the applied pressure; After the torsion test of the frame of the solar thermal backplane 3, the static flatness deviation of the frame is repaired, and the tension frame 8 applies pressure in the opposite direction of the frame deviation. When the sleeve 71 reaches the limit position, the cone rod 1 76 or the cone rod 2 77 will contact the sleeve 71 and slide under pressure, so that the blocked connecting hole 78 is connected, and the sleeve 71 is depressurized and reset until the cone rod 1 76 or the cone rod 2 77 blocks the connecting hole 78 again. The frame is shaken back and forth to eliminate stress and quickly complete the flatness repair.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention.

Claims

1. A photothermal backplane flatness detection device, characterized in that: include: A solar thermal backplane (3) comprises a substrate and a frame, wherein the frame comprises an annular frame (31), wherein the annular frame (31) is provided with two ribs (32) at the locations where the long side is divided into three equal parts, wherein a connecting seat (33) is installed in the middle of the ribs (32), wherein a first support plate (34) is installed in the middle of the two ribs (32), wherein a second support plate (35) is installed at the connection between the annular frame (31) and the ends of the ribs (32), and wherein a third support plate (36) is installed at the short side corner and at the locations where the annular frame (31) is divided into two equal parts; A bearing seat (2), the bearing seat (2) comprising a bottom block (21), a long guide rod (25) being mounted on the top surface of the bottom block (21), a plug hole being provided at a position of the connecting seat (33) corresponding to the long guide rod (25), and a clamping nut being provided at the top of the connecting seat (33); A flatness detection module (4), the flatness detection module (4) comprising a distance sensor 1 (41) having a consistent distance from the top surface of the two support plates 1 (34), a distance sensor 2 (42) having a consistent distance from the top surface of the four support plates 2 (35), and a distance sensor 3 (43) having a consistent distance from the top surface of the six support plates 3 (36); A tension frame (8), the tension frame (8) comprising a group frame (82) and a hanging frame (84), the protrusion at the upper end of the hanging frame (84) being at the same height as the horizontal center line of the ring frame (31); The coupling assembly (5) is connected to a hanging bracket (84) which can be horizontally moved and clamped in a middle groove (37) of the ring frame (31). A power assembly (7) is fixedly mounted on the lower end of the hanging bracket (84). The power assembly (7) drives the hanging bracket (84) to slide vertically along the assembly frame (82).

2. The photothermal backplane flatness detection device according to claim 1, characterized in that: The power assembly (7) comprises a sleeve (71) and a slide rod (72); a hanger (84) is fixedly connected to the sleeve (71); a piston (73) is installed in the middle of the slide rod (72); the slide rod (72) is fixedly connected to the assembly frame (82); and the piston (73) divides the sleeve (71) into a hydraulic chamber 1 (74) and a hydraulic chamber 2 (75).

3. The photothermal backplane flatness detection device according to claim 2, characterized in that: The invention also comprises a circulation pipe group (6), wherein the circulation pipe group (6) comprises a pump (61), an output pipe (62) being installed at the outlet end of the pump (61), a return pipe (63) being installed at the inlet end of the pump (61), the output pipe (62) being connected to a lower output branch pipe (66) and an upper output branch pipe (67) via a first reversing valve (64), the return pipe (63) being connected to a lower return branch pipe (68) and an upper return branch pipe (69) via a second reversing valve (65), the lower output branch pipe (66) and the lower return branch pipe (68) being in communication with the bottom of a second hydraulic chamber (75), and the upper output branch pipe (67) and the upper return branch pipe (69) being in communication with the top of a first hydraulic chamber (74).

4. The photothermal backplane flatness detection device according to claim 3, characterized in that: The piston (73) is provided with a connecting hole (78) connecting the hydraulic chamber 1 (74) and the hydraulic chamber 2 (75) along the axial direction. The connecting holes (78) are provided with two conical rods 1 (76) and 2 (77) are slidably mounted thereon respectively. The conical rod 1 (76) is thick at the top and narrow at the bottom, and the conical rod 2 (77) is narrow at the top and thick at the bottom. The two connecting holes (78) are respectively adapted to the shapes of the conical rod 1 (76) and the conical rod 2 (77). An elastic member (79) is mounted between the large diameter ends of the conical rod 1 (76) and the conical rod 2 (77) and the inner wall of the connecting hole (78). The small diameter ends of the conical rod 1 (76) and the conical rod 2 (77) protrude a certain distance from the end surface of the piston (73).

5. The photothermal backplane flatness detection device according to claim 4, characterized in that: The coupling assembly (5) comprises a horizontal rod (53) and a swing plate (54); a cone portion (57) is provided in the middle of the horizontal rod (53); a pressure block (58) is installed on the swing plate (54) opposite to the cone portion (57); the swing plate (54) drives the pressure block (58) to press the cone portion (57) downward, thereby pushing the horizontal rod (53) to translate; when the horizontal rod (53) translates, the hanging bracket (84) is driven to be clamped in the middle groove (37).

6. The photothermal backplane flatness detection device according to claim 5, characterized in that: The joint assembly (5) further comprises a guide seat 1 (51) and a guide seat 2 (52); the guide seat 1 (51) is hingedly assembled with a swing plate (54); a clamping plate (55) with an opening facing downward is installed on the swing plate (54) opposite to the guide seat 2 (52); the guide seat 2 (52) is provided with a cylindrical member cooperating with the clamping plate (55); a handle (56) is fixedly installed on the top surface of one end of the swing plate (54) away from the guide seat 1 (51).

7. The photothermal backplane flatness detection device according to claim 6, characterized in that: The pump (61) is a one-way piston pump. The pump (61) is mounted on the end of the swing plate (54) close to the guide seat (51). The swing plate (54) is hingedly mounted with a pressure rod above the pump (61). The pressure rod is hingedly assembled with the pump (61).

8. The photothermal backplane flatness detection device according to claim 6, characterized in that: The bearing seat (2) comprises an intermediate plate (22) and a top plate (23), wherein the intermediate plate (22) and the top plate (23) are respectively fixed to the top and bottom ends of the connecting seat (33), and a screw rod (24) is fixedly mounted on the top surface of the intermediate plate (22). The screw rod (24) passes through the connecting seat (33) and the top plate (23) and is screwed with a self-locking nut on the top of the top plate (23).

9. The photothermal backplane flatness detection device according to claim 1, characterized in that: The bearing seat (2) comprises an intermediate plate (22) and a top plate (23), wherein the intermediate plate (22) and the top plate (23) are respectively fixed to the top and bottom ends of the connecting seat (33), a screw rod (24) is fixedly mounted on the top surface of the intermediate plate (22), the screw rod (24) passes through the connecting seat (33) and the top plate (23) and a self-locking nut is screwed and mounted above the top plate (23), a short guide rod (26) is mounted on the bottom of the intermediate plate (22), a vertical hole matching the short guide rod (26) is opened on the top surface of the bottom block (21), a stop seat (28) is provided at a position of the top plate (23) corresponding to the screw rod (24), the stop seat (28) is inserted through the screw rod (24), a protrusion on the upper part of the stop seat (28) is in sliding contact with a vertical side wall of the connecting seat (33), and a lifting rod (27) is provided on the top of the stop seat (28).

10. A method for detecting the flatness of a photothermal backplane, according to the device for detecting the flatness of a photothermal backplane according to claim 6, characterized in that: The following steps are involved: A frame for placing the solar thermal backplane (3) is provided, and an intermediate plate (22) is installed at the bottom end of the connecting seat (33). The intermediate plate (22) is installed at the top end of the connecting seat (33) via a screw rod (24). The lifting rod (27) of the top plate (23) is connected to a lifting steel cable and is horizontally centered on the top of the bottom block (21) under the guidance of a long guide rod (25) and a short guide rod (26); To detect the static flatness of the frame, two distance sensors 1 (41) are respectively irradiated at the center position of the top surface of the support plate 1 (34) and ensure that the distance is consistent. At the same time, the distance sensor 2 (42) is consistent with the top surface of the four support plates 2 (35), and the distance sensor 3 (43) is consistent with the top surface of the six support plates 3 (36). The height data of the corners of the ring frame (31), the points dividing the long side of the ring frame (31) into three equal parts, the midpoint of the short side of the ring frame (31), and the midpoint of the rib plate (32) are collected; To detect the dynamic flatness of the frame, the bracket (84) is inserted into the middle groove (37) of the ring frame (31). During the torsion test, the pump (61) pumps out the oil in the hydraulic chamber 1 (74) through the upper return branch pipe (69) and the return pipe (63), and delivers it to the hydraulic chamber 2 (75) through the output pipe (62) and the lower output branch pipe (66), so that the sleeve (71) drives the bracket (84) to move downward to the corner of the ring frame (31). Similarly, the pump (61) pumps out the oil in the second hydraulic chamber (75) through the lower return branch pipe (68) and the return pipe (63), and delivers it to the first hydraulic chamber (74) through the output pipe (62) and the upper output branch pipe (67), so that the sleeve (71) drives the hanger (84) to move upward to apply upward pressure to the corner position of the ring frame (31), and the external pressure data is detected by the pressure sensor module (9); To repair the static flatness deviation of the frame, the tension frame (8) applies pressure in the opposite direction of the frame deviation. When the sleeve (71) reaches the limit position, the first cone rod (76) or the second cone rod (77) contacts the inner wall of the end of the sleeve (71) and slides under pressure, so that the blocked connecting hole (78) is connected, and the sleeve (71) is depressurized and reset until the first cone rod (76) or the second cone rod (77) blocks the connecting hole (78) again. The frame is shaken back and forth to eliminate stress and quickly complete the flatness repair.

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