Photovoltaic support strength detection device

Abstract

The present invention belongs to the technical field of photovoltaic brackets, and specifically discloses a photovoltaic bracket strength detection device, including a fixed base, two horizontal edges of the middle part of the fixed base are symmetrically fixed with struts, a square frame is provided between the struts, the lower sides of the two horizontal beams distributed in the longitudinal direction of the square frame are both vertically arrayed and fixed with the same number of first limit columns, the lower sides of the middle parts of the two longitudinal beams distributed in the transverse direction of the square frame are both vertically fixed with second limit columns, and the lower sides of the square frame are respectively provided with a second pressure-bearing beam and a first pressure-bearing beam parallel to the square frame from top to bottom, the lower sides of the first pressure-bearing beam and the second pressure-bearing beam are both connected with an adaptive deformation dynamic pressure mechanism, the adaptive deformation dynamic pressure mechanism is provided with a follow-up vertical displacement detection mechanism, and an angle adjustment mechanism is provided at one of the connections between the square frame and the struts. The present invention can independently apply force and displacement measurements for multiple measurement nodes, and simulate the loading of non-uniform loads that change with deformation under actual force conditions.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic brackets, and specifically refers to a photovoltaic bracket strength detection device. Background Art

[0002] Photovoltaic power generation, as a clean energy technology, has developed rapidly in recent years and has been widely used. As the basic structure of the photovoltaic system, the photovoltaic bracket is used to fix the photovoltaic modules at a specific angle and spacing, and bear various loads, such as wind load, snow load, deadweight, etc. The strength and stability of the photovoltaic bracket are directly related to the safety and service life of the entire photovoltaic system. Strength testing of photovoltaic brackets can timely discover the defects and weak links of the bracket structure, evaluate its bearing capacity, and provide protection for the safe operation of the photovoltaic system.

[0003] Photovoltaic brackets are usually composed of foundations, columns, main beams and purlins. Among them, purlins are usually metal components installed horizontally on the main beams, which are used to support and fix photovoltaic modules. Since the purlins are directly connected to the photovoltaic modules and bear the wind load and snow load transmitted from the photovoltaic modules, they are the key parts of the strength test of photovoltaic brackets. There are usually multiple purlins on each set of photovoltaic brackets, and multiple photovoltaic modules are installed on each purlin. Due to the distribution and installation method of photovoltaic modules, it is necessary to apply pressure to multiple purlins and multiple parts of each purlin, that is, to set up multiple measurement nodes, in order to comprehensively evaluate the strength of the photovoltaic bracket.

[0004] Due to the large number of measurement nodes, some simple test methods use a power mechanism (such as a hydraulic cylinder) to drive a force-applying structure to perform pressure detection on the force-bearing points of multiple purlins at the same time. Since the stroke of the hydraulic cylinder is a linear motion, the driven force-applying structure also moves in a straight line. Since the force-applying structure is rigid, the displacement of each node is the same. In this case, the displacement of the position in contact with the purlin is also the same, and the displacement difference caused by the strength difference at different positions cannot be reflected, resulting in inaccurate measurement results.

[0005] In order to measure more accurately, some devices use independent pressure on each stress node and measure it simultaneously. However, this method usually defaults to applying equal loads, that is, the detection pressure at each point is the same, because the photovoltaic components will evenly distribute the pressure. But in actual situations, when the photovoltaic bracket is subjected to wind pressure or snow pressure, if a weak node of the purlin is greatly deformed under pressure, it will collapse due to the damage and deformation, causing the snow or wind to act more concentratedly on this position, causing it to be subjected to greater pressure. For example, the surrounding snow will move closer to the depression under the action of gravity, causing the pressure on the node to increase, forming a vicious cycle and accelerating the destruction of the weak position. Traditional uniform force measurement cannot simulate this non-uniform actual stress condition that changes with deformation, resulting in deviations between the test results and the actual situation, and this type of measurement result conceals potential risks. The harm caused by this test error will be greater. Summary of the invention

[0006] In view of the above situation, the present invention provides a photovoltaic bracket strength detection device, which can perform independent force and displacement measurement on multiple measurement nodes, and simulate the loading of non-uniform loads that change with deformation under actual stress conditions. It can more realistically reflect the actual stress conditions and effectively avoid the safety hazards caused by the defects of traditional testing methods.

[0007] The technical solution adopted by the present invention is as follows: The present invention proposes a photovoltaic bracket strength detection device, including a fixed base, a bracket body is detachably fixed on the upper side of the fixed base, support rods are symmetrically fixed on the two horizontal edges of the middle part of the fixed base, a square frame is provided between the support rods, and the two horizontal sides of the middle part of the square frame are rotatably connected to the upper end of the support rod, the lower sides of the two horizontal beams distributed in the longitudinal direction of the frame are vertically arrayed and fixed with the same number of first limit columns, and the lower sides of the two longitudinal beams distributed in the transverse direction of the frame are vertically fixed with second limit columns, and the lower sides of the middle parts of the two longitudinal beams distributed in the transverse direction of the frame are vertically fixed with second limit columns, and the lower part of the frame is respectively provided with a second pressure-bearing beam and a first pressure-bearing beam parallel to the frame from top to bottom, and the two ends of the second pressure-bearing beam are respectively vertically slid through by the second limit columns, the first pressure-bearing beam is arranged along the transverse array, and the two ends of the first pressure-bearing beam are respectively vertically slid through by two first limit columns located opposite to each other in the longitudinal direction, and the lower sides of the first pressure-bearing beam and the second pressure-bearing beam are connected with an adaptive deformation dynamic pressure mechanism, and the adaptive deformation dynamic pressure mechanism is provided with a follow-up vertical displacement detection mechanism, and an angle adjustment mechanism is provided at one of the connections between the square frame and the support rod.

[0008] Furthermore, the adaptive deformation dynamic pressure mechanism includes a first mounting block and a second mounting block, the first mounting block is vertically fixed on the two edges of the lower sides of the first pressure-bearing beam and the second pressure-bearing beam, the second mounting block array is fixedly arranged at the middle position of the lower sides of the first pressure-bearing beam and the second pressure-bearing beam, the second mounting block is penetrated by a through groove along the length direction, a slider is tightly slidably arranged in the through groove, the second mounting block is connected to a bar hole on the lower side of the through groove, a groove is arranged on the lower side of the slider, a first connecting shaft is vertically fixed on the slider in the groove, and the first mounting block and the adjacent second A group of first and second connecting rods are provided between the two mounting blocks and between every two adjacent second mounting blocks. One end of the first connecting rod of each group and one end of the second connecting rod are rotatably connected to the second connecting shaft. The other end of the first connecting rod of each group is rotatably connected to the corresponding first mounting block and the first connecting shaft. The first and second connecting rods of each group are symmetrically arranged on both sides of the second connecting shaft. The upper angle between the first and second connecting rods of each group is less than 180 degrees. Rollers are symmetrically fixed at both ends of the second connecting shaft. The first and second connecting rods on each slider pass through corresponding strip holes.

[0009] Furthermore, the follow-up vertical displacement detection mechanism includes a fixed shaft, which is respectively vertically fixed on the same side of the first connecting rod and the second connecting rod of each group, the two fixed shafts of each group are symmetrically arranged on both sides of the second connecting shaft, and the third connecting rod is rotatably arranged on the two fixed shafts of each group and symmetrically arranged on both sides of the second connecting shaft. The adjacent ends of the third connecting rod of each group are rotatably provided with a lifting plate, and the lifting plate is located above the roller. A bidirectional laser rangefinder is vertically penetrated and fixedly provided at the center of the lifting plate to realize bidirectional ranging, and the lower end of the bidirectional laser rangefinder vertically points to the roller on one side, and the upper end of the bidirectional laser rangefinder vertically points to the first pressure beam and the second pressure beam.

[0010] Furthermore, the angle adjustment mechanism includes a rotating shaft and a support rod. The rotating shaft is fixed on one side of the square frame. The rotating shaft passes through one of the support rods and is coaxially fixed with a worm gear. The support rod is vertically fixed in pairs on the outside of one of the support rods. A worm is rotatably provided on the support rod. The worm is meshingly connected with the worm wheel. A rocker is fixed at one end of the worm, and the worm is rotated by the rocker to achieve rotation adjustment and self-locking of the worm wheel.

[0011] Furthermore, a cross beam is fixedly provided inside the square frame, a hydraulic cylinder is fixedly provided at the center of the lower side of the cross beam, and the downward pressure-applying end of the hydraulic cylinder is directly facing the middle part of the second pressure-bearing beam to achieve pressure on the second pressure-bearing beam.

[0012] Furthermore, a one-way laser rangefinder is fixedly provided on the lower side of the cross beam near the hydraulic cylinder, and the lower end of the one-way laser rangefinder is vertically pointed to the second pressure beam for measuring the displacement of the second pressure beam.

[0013] Furthermore, a nut is threadedly connected to the lower end of the first limiting column, which is close to and vertically penetrates the first pressure-bearing beam and is used to fix the first pressure-bearing beam on the first limiting column when no measurement is performed.

[0014] Furthermore, the support body includes purlins installed at equal intervals laterally, and when the square frame is parallel to the diagonal support plane of the support body, the second pressure beam is parallel to the purlin and the first pressure beam is perpendicular to the purlin, and when the square frame is parallel to the diagonal support plane of the support body, all rollers on the first pressure beam can correspond one-to-one with the measured nodes of the purlin, and all rollers on the second pressure beam can correspond one-to-one with the first pressure beam on the upper side of the first pressure beam, so that the pressure output by the hydraulic cylinder can be transmitted to all measured nodes of the purlin.

[0015] Furthermore, the first pressure-bearing beam and the second pressure-bearing beam are made of high-strength and high-rigidity materials, so that the disturbance deformation of the first pressure-bearing beam and the second pressure-bearing beam when subjected to concentrated force can be ignored.

[0016] The beneficial effects achieved by the present invention using the above structure are as follows:

[0017] (1) The core of the adaptive deformation dynamic pressure mechanism is to use the connecting rod mechanism to convert the vertical displacement of the roller into the horizontal displacement of the slider. When the roller moves down due to the deformation of the purlin, the connecting rod mechanism connecting the roller will drive the slider to move to one side, thereby changing the geometric shape of the connecting rod mechanism and then changing the pressure applied to the roller. This ingenious mechanism design enables each roller to automatically adjust the applied pressure according to the deformation of its position, thereby realizing dynamic pressure that changes with deformation. This non-uniform load loading method that changes with deformation can more realistically simulate the stress conditions of the photovoltaic bracket during actual use, thereby more accurately evaluating the strength and stability of the bracket and effectively avoiding safety hazards caused by the defects of traditional testing methods.

[0018] (2) A symmetrically distributed third link is provided on both sides of each roller. The third link is connected to the lifting plate so that the lifting plate always moves with the roller. A bidirectional laser rangefinder is installed on the lifting plate to measure the distance between the roller and the corresponding pressure beam. Combined with the unidirectional laser rangefinder, the absolute displacement of the roller can be calculated, and then the displacement of the corresponding measurement node can be obtained, thereby realizing independent and accurate displacement measurement of each measurement node, providing a more comprehensive and reliable data basis for evaluating the strength of the bracket.

[0019] (3) The present invention does not adopt the traditional method of equipping each measuring node with an independent force-applying device. Instead, the pressure of a hydraulic cylinder is dynamically distributed to each measuring node through an ingenious design of a pressure beam and a roller. The hydraulic cylinder pushes the second pressure beam downward, and the roller on the second pressure beam transfers the pressure to the first pressure beam in contact with it, and then to each measuring node. This greatly simplifies the device structure, reduces manufacturing and maintenance costs, improves detection efficiency, and shortens the detection cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a first three-dimensional structural schematic diagram of a photovoltaic support strength detection device proposed by the present invention.

[0021] Figure 2 This is a second three-dimensional structural schematic diagram of a photovoltaic support strength detection device proposed by the present invention.

[0022] Figure 3 This is a side view of a photovoltaic support strength detection device proposed by the present invention.

[0023] Figure 4 This is a schematic diagram of the explosion structure of a photovoltaic support strength detection device proposed by the present invention.

[0024] Figure 5 This is a structural schematic diagram of the positional relationship between an adaptive deformation dynamic pressure mechanism and a follow-up vertical displacement detection mechanism of a photovoltaic support strength detection device proposed by the present invention.

[0025] Figure 6 for Figure 5 Enlarged view of part A.

[0026] Figure 7 This is a schematic diagram of the exploded structure of the position relationship between the second mounting block and the slider of a photovoltaic support strength detection device proposed by the present invention.

[0027] Figure 8 for Figure 4 Enlarged view of part B.

[0028] Fig. 9 for Figure 1 Enlarged view of part C.

[0029] Fig.10 for Figure 1 Enlarged view of part D in the middle.

[0030] Fig.11 This is a motion decomposition diagram of the adaptive deformation dynamic pressure mechanism of the photovoltaic support strength detection device proposed by the present invention.

[0031] Fig.12 It is a schematic diagram of the connection between the bracket body and the photovoltaic module.

[0032] Among them, 1. fixed base, 2. support rod, 3. square frame, 31. cross beam, 32. first limit column, 33. second limit column, 34. hydraulic cylinder, 35. one-way laser rangefinder, 36. nut, 4. first pressure beam, 5. second pressure beam, 6. adaptive deformation dynamic pressure mechanism, 61. first mounting block, 62. second mounting block, 621. through groove, 622. bar hole, 63. slider, 631. groove, 632. first connecting shaft, 64. first connecting rod, 65. second connecting rod, 66. second connecting shaft, 67. roller, 7. follow-up vertical displacement detection mechanism, 71. fixed shaft, 72. third connecting rod, 73. lifting plate, 74. two-way laser rangefinder, 8. bracket body, 81. purlin, 9. angle adjustment mechanism, 91. rotating shaft, 92. worm gear, 93. worm, 94. rocker, 95. support rod.

[0033] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0036] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12As shown, the present invention proposes a photovoltaic support strength detection device, including a fixed base 1, a support body 8 is detachably fixed on the upper side of the fixed base 1, support rods 2 are symmetrically fixed on the two horizontal edges of the middle part of the fixed base 1, a square frame 3 is provided between the support rods 2, and both horizontal sides of the middle part of the frame 3 are rotatably connected to the upper end of the support rod 2, the lower sides of the two longitudinal beams distributed in the frame 3 are vertically fixed with the same number of first limiting columns 32, the lower sides of the two longitudinal beams distributed in the frame 3 are vertically fixed with second limiting columns 33, and the lower side of the frame 3 is divided from top to bottom. A second pressure-bearing beam 5 and a first pressure-bearing beam 4 are separately provided which are parallel to the square frame 3. The two ends of the second pressure-bearing beam 5 are respectively penetrated vertically by the second limit columns 33 for vertical sliding. The first pressure-bearing beam 4 is arranged along a transverse array. The two ends of the first pressure-bearing beam 4 are respectively penetrated vertically by two first limit columns 32 which are located opposite to each other in the longitudinal direction. The lower sides of the first pressure-bearing beam 4 and the second pressure-bearing beam 5 are both connected with an adaptive deformation dynamic pressure mechanism 6. The adaptive deformation dynamic pressure mechanism 6 is provided with a follow-up vertical displacement detection mechanism 7. An angle adjustment mechanism 9 is provided at one of the connections between the square frame 3 and the support rod 2.

[0037] The adaptive deformation dynamic pressure mechanism 6 includes a first mounting block 61 and a second mounting block 62. The first mounting block 61 is vertically fixed on the two edges of the lower sides of the first pressure-bearing beam 4 and the second pressure-bearing beam 5. The second mounting block 62 is fixed in an array at the middle position of the lower sides of the first pressure-bearing beam 4 and the second pressure-bearing beam 5. The second mounting block 62 is provided with a through groove 621 running through the length direction. A slider 63 is provided in the through groove 621 to slide tightly. The second mounting block 62 is connected to a bar hole 622 on the lower side of the through groove 621. A groove 631 is provided on the lower side of the slider 63. A first connecting shaft 632 is vertically fixed in the groove 631 of the slider 63. The first mounting block 61 and the adjacent second mounting block 62 are connected by a through groove 621. A group of first connecting rods 64 and second connecting rods 65 are provided between every two adjacent second mounting blocks 62, one end of the first connecting rod 64 and one end of the second connecting rod 65 of each group are rotatably connected to the second connecting shaft 66, the other end of the first connecting rod 64 and the other end of the second connecting rod 65 of each group are rotatably connected to the corresponding first mounting block 61 and the first connecting shaft 632, the first connecting rod 64 and the second connecting rod 65 of each group are symmetrically arranged along both sides of the second connecting shaft 66, the upper side angle of the first connecting rod 64 and the second connecting rod 65 of each group is less than 180 degrees, rollers 67 are symmetrically fixed at both ends of the second connecting shaft 66, and the first connecting rod 64 and the second connecting rod 65 on each slider 63 pass through the corresponding bar hole 622.

[0038] The follow-up vertical displacement detection mechanism 7 includes a fixed shaft 71, which is respectively and vertically fixed on the same side of the first connecting rod 64 and the second connecting rod 65 of each group. The two fixed shafts 71 of each group are symmetrically arranged along the two sides of the second connecting shaft 66. The two fixed shafts 71 of each group are rotatably provided with a third connecting rod 72 and are symmetrically arranged along the two sides of the second connecting shaft 66. The adjacent ends of the third connecting rod 72 of each group are rotatably provided with a lifting plate 73. The lifting plate 73 is located above the roller 67. A bidirectional laser rangefinder 74 is vertically penetrated and fixedly provided at the center of the lifting plate 73. The lower end of the bidirectional laser rangefinder 74 vertically points to the roller 67 on one side. The upper end of the laser rangefinder 74 is vertically pointed to the first pressure beam 4 and the second pressure beam 5. The angle adjustment mechanism 9 includes a rotating shaft 91 and a support rod 95. The rotating shaft 91 is fixed on one side of the frame 3. The rotating shaft 91 passes through one of the support rods 2 and is coaxially fixed with a worm gear 92. The support rods 95 are vertically fixed in pairs on the outside of one of the support rods 2. A worm 93 is rotatably provided on the support rod 95. The worm 93 is meshed with the worm gear 92. A rocker 94 is fixed at one end of the worm 93. A cross beam 31 is fixed on the inner side of the frame 3. A hydraulic cylinder 34 is fixed at the center of the lower side of the cross beam 31. The downward pressure-applying end of the hydraulic cylinder 34 faces the middle of the second pressure beam 5.

[0039] Among them, a one-way laser rangefinder 35 is fixedly provided on the lower side of the cross beam 31 near the hydraulic cylinder 34, and the lower end of the one-way laser rangefinder 35 vertically points to the second pressure beam 5. The lower end of the first limit column 32 is close to and vertically penetrates the first pressure beam 4 and is threadedly connected with a nut 36. The bracket body 8 includes purlins 81 installed at equal intervals in the horizontal direction. When the square frame 3 is parallel to the diagonal support plane of the bracket body 8, the second pressure beam 5 is parallel to the purlin 81 and the first pressure beam 4 is perpendicular to the purlin 81. When the square frame 3 is parallel to the diagonal support plane of the bracket body 8, all rollers 67 on the first pressure beam 4 can correspond one-to-one with the measured nodes of the purlin 81, and all rollers 67 on the second pressure beam 5 can correspond one-to-one with the first pressure beam 4 on the upper side of the first pressure beam 4.

[0040] During specific use, it is necessary to assemble the bracket body 8 to be measured this time. Before assembly, it is necessary to adjust the angle of the frame 3 so that the frame 3 can be parallel to the diagonal support plane of the bracket body 8 measured this time, and turn the rocker 94 to drive the worm 93 to rotate, thereby driving the worm wheel 92 to rotate with the rotating shaft 91 as the axis, thereby driving the frame 3 to rotate to a preset angle, and then due to the self-locking function of the worm wheel 92 and the worm 93, the angle of the frame 3 is fixed, and then a group of bracket bodies 8 are assembled under the first pressure beam 4. The base of the bracket body 8 is fixedly connected to the fixed base 1 by bolts, and the assembly position is reasonably adjusted so that after the assembly is completed, all rollers 67 on the first pressure beam 4 can be aligned with the purlin 8 1 corresponds to the measured nodes on the frame 3. Since the frame 3 is parallel to the diagonal support plane at this time, the first limiting column 32 and the second limiting column 33 which are perpendicular to the frame 3 are both perpendicular to the diagonal support plane, so that when the nut 36 is screwed off, the first pressure-bearing beam 4 which has lost its support will be close to the purlin 81 under the limitation of the first limiting column 32, so that the rollers 67 on all the first pressure-bearing beams 4 are connected to the nodes of the purlin 81 measured this time, and the second pressure-bearing beams 5 slide down under the limitation of the second limiting column 33, so that all the rollers 67 on the second pressure-bearing beams 5 can contact the middle part of each first pressure-bearing beam 4 on the upper side of the first pressure-bearing beam 4, and then the pressure end of the hydraulic cylinder 34 is adjusted to press against the middle part of the second pressure-bearing beam 5.

[0041] The hydraulic cylinder 34 is started to apply pressure, driving the second pressure beam 5 to move perpendicularly to the diagonal support plane, driving the roller 67 on the second pressure beam 5 to start evenly pressing down all the first pressure beams 4. Since the first pressure beams 4 are perpendicular to the purlins 81 and distributed in the length direction of the purlins 81, each purlin 81 will produce deflection deformation. The pressure positions of the multiple purlins 81 pressed down by the first pressure beam 4 located in the middle are all located in the middle of the purlin 81, and the pressure positions of the multiple purlins 81 pressed down by the first pressure beam 4 located at the edge are all located at the edge of the purlin 81. Under the deflection deformation, the displacement in the middle is greater than the displacement at the edge, so that theoretically the downward displacement of the first pressure-bearing beam 4 located in the middle is greater than that of the first pressure-bearing beam 4 located at the edge. Since the roller 67 is always in close contact with the first pressure-bearing beam 4, the angle between the first connecting rod 64 and the upper side of the second connecting rod 65 on both sides of the roller 67 with a larger downward movement becomes smaller, so that the slider 63 connected to the second connecting rod 65 moves to this side, so that the first connecting rod 64 on the other side of the slider 63 is driven, so that the angle between the driven first connecting rod 64 and the upper side of the connected second connecting rod 65 becomes larger. The corresponding rollers 67 will move upward relatively, so different rollers 67 will have different displacements, and can adapt to the first pressure-bearing beam 4 under pressure according to the deformation situation. The final result is that the middle first pressure-bearing beam 4 moves down more, and the first pressure-bearing beams 4 on both sides move down less. When the pressure is transmitted to a certain first pressure-bearing beam 4, the rollers 67 on the first pressure-bearing beam 4 will press down different purlins 81. Since the relative positions of the pressing points on different purlins 81 are the same, that is, the lengths from the edges of the purlins 81 are the same, the same first pressure-bearing beam 4 will move down more. After the pressure of the pressure beam 4 is evenly distributed by the roller 67, the deformation of the pressure points of the purlin 81 is the same. However, due to the material strength problem, the weak purlin 81 will produce a larger deformation. Therefore, the roller 67 on the same first pressure beam 4 will start to adaptively displace according to the above-mentioned movement law to always stick to different measurement nodes. Finally, the weak purlin 81 node will produce a larger deformation. Since the deformation of the purlin 81 is actually very small, it is ensured that the roller 67 can always apply pressure on the first pressure beam 4 and the purlin 81 without falling off.

[0042] When the roller 67 is adaptively deformed and finally stabilized, the slider 63 is also stable. According to the force analysis, the horizontal components of the first connecting rod 64 and the second connecting rod 65 on both sides of the slider 63 are equal. In the force triangle analysis, the larger the angle between the oblique line and the equal-length horizontal line, the longer the oblique line is, and the corresponding force is greater. The larger the angle is, the greater the distance the roller 67 moves downward, and therefore the greater the deformation is. According to the above force analysis, the force applied to the deformed part will be increased. In practice, when the snow load is distributed on the purlin 81, the deflection deformation in the middle of the same purlin 81 is greater, causing the snow to begin to move toward the middle, thereby generating greater pressure. This is the same as the pressure applied by different rollers 67 on the second pressure beam 5. When the same position of different purlins 81 is subjected to snow pressure, the snow will move toward the weak position with a larger collapse, resulting in greater pressure. This is the same as the pressure applied by different rollers 67 on the first pressure beam 4.

[0043] Since the first connecting rod 64 and the second connecting rod 65 on both sides of the roller 67 always move symmetrically, and the third connecting rod 72 on both sides of the roller 67 is symmetrically distributed, when the roller 67 is displaced, the lifting plate 73 will always follow the roller 67 in the horizontal direction, so that the lower end of the two-way laser rangefinder 74 will always be vertically oriented towards the roller 67, and the upper end of the two-way laser rangefinder 74 will always be vertically oriented towards the second pressure beam 5 and the first pressure beam 4. The sum of the values ​​measured in the two directions by the two-way laser rangefinder 74 will be able to infer the relative displacement of the roller 67 and the second pressure beam 5 and the first pressure beam 4. When it is necessary to measure the displacement of the target force node of a certain purlin 81, the unidirectional laser rangefinder 35 first measures the downward movement distance of the second pressure beam 5, and the two-way laser rangefinder 74 corresponding to a certain roller 67 on the second pressure beam 5 measures the relative displacement of the roller 67 and the second pressure beam 5 Displacement, the unidirectional laser rangefinder 35 emits laser from one end to measure the displacement in that direction, and the bidirectional laser rangefinder 74 emits laser from both ends to measure the displacement in both directions. This is an existing conventional technical means, so its structural principle is not repeated here. The absolute displacement of the roller 67 is calculated by addition and subtraction, and then the absolute displacement of the first pressure beam 4 pressed down by the roller 67 is obtained. The bidirectional laser rangefinder 74 corresponding to a roller 67 on the first pressure beam 4 measures the relative displacement of the roller 67 and the first pressure beam 4, and finally calculates the absolute displacement of the target roller 67, that is, the target measurement node, so as to detect the precise displacement of each measurement node, and comprehensively obtain the weak position distribution of the purlin 81, and can assist in measuring the actual force by installing pressure sensors on the first connecting rod 64 and the second connecting rod 65, so as to perform further data analysis.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

[0046] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A photovoltaic support strength detection device, comprising a fixed base (1), characterized in that: A bracket body (8) is detachably fixed on the upper side of the fixed base (1); support rods (2) are symmetrically fixed on two transverse edges of the middle part of the fixed base (1); a frame (3) is provided between the support rods (2); both transverse sides of the middle part of the frame (3) are rotatably connected to the upper ends of the support rods (2); the lower sides of two transverse beams distributed longitudinally of the frame (3) are vertically fixed with the same number of first limiting columns (32); the lower sides of two longitudinal beams distributed transversely of the frame (3) are vertically fixed with second limiting columns (33); and second pressure-bearing beams parallel to the frame (3) are respectively provided below the frame (3) from top to bottom. (5) and a first pressure-bearing beam (4), the two ends of the second pressure-bearing beam (5) are respectively penetrated vertically by second limit columns (33), the first pressure-bearing beam (4) is arranged along a transverse array, the two ends of the first pressure-bearing beam (4) are respectively penetrated vertically by two first limit columns (32) located opposite to each other in the longitudinal direction, the lower sides of the first pressure-bearing beam (4) and the second pressure-bearing beam (5) are both connected to an adaptive deformation dynamic pressure mechanism (6), the adaptive deformation dynamic pressure mechanism (6) is provided with a follow-up vertical displacement detection mechanism (7), and an angle adjustment mechanism (9) is provided at one of the connections between the frame (3) and the support rod (2); The adaptive deformation dynamic pressure mechanism (6) comprises a first mounting block (61) and a second mounting block (62), wherein the first mounting block (61) is vertically fixed on the two edges of the lower sides of the first pressure-bearing beam (4) and the second pressure-bearing beam (5), and the second mounting blocks (62) are array-fixed at the middle position of the lower sides of the first pressure-bearing beam (4) and the second pressure-bearing beam (5). The second mounting block (62) is provided with a through groove (621) running through it along the length direction, and a slider (63) is tightly slidably provided in the through groove (621). The second mounting block (62) is provided with a bar hole (622) on the lower side of the through groove (621), and a groove (631) is provided on the lower side of the slider (63). The slider (63) is vertically fixed with a first connecting shaft (632) in the groove (631). The first mounting block (61) and the adjacent second mounting block (61) are connected to each other. A group of first connecting rods (64) and second connecting rods (65) are provided between the mounting blocks (62) and between each two adjacent second mounting blocks (62); one end of the first connecting rod (64) and one end of the second connecting rod (65) of each group are rotatably connected to a second connecting shaft (66); the other end of the first connecting rod (64) and the other end of the second connecting rod (65) of each group are rotatably connected to the corresponding first mounting block (61) and the first connecting shaft (632); the first connecting rod (64) and the second connecting rod (65) of each group are symmetrically arranged along both sides of the second connecting shaft (66); the upper side angle of the first connecting rod (64) and the second connecting rod (65) of each group is less than 180 degrees; rollers (67) are symmetrically fixed at both ends of the second connecting shaft (66); and the first connecting rod (64) and the second connecting rod (65) on each slider (63) pass through the corresponding bar hole (622); The follow-up vertical displacement detection mechanism (7) comprises a fixed shaft (71), the fixed shaft (71) being respectively and vertically fixedly arranged on the same side of the first connecting rod (64) and the second connecting rod (65) of each group, the two fixed shafts (71) of each group being symmetrically arranged along the two sides of the second connecting shaft (66), the third connecting rod (72) being rotatably arranged on the two fixed shafts (71) of each group and being symmetrically arranged along the two sides of the second connecting shaft (66), the adjacent ends of the third connecting rod (72) of each group being rotatably arranged with a lifting plate (73), the lifting plate (73) being located above the roller (67), the center of the lifting plate (73) being vertically penetrated and fixedly provided with a bidirectional laser rangefinder (74), the lower end of the bidirectional laser rangefinder (74) being vertically pointed to the roller (67) on one side, and the upper end of the bidirectional laser rangefinder (74) being vertically pointed to the first pressure beam (4) and the second pressure beam (5).

2. A photovoltaic support strength detection device according to claim 1, characterized in that: The angle adjustment mechanism (9) comprises a rotating shaft (91) and a support rod (95); the rotating shaft (91) is fixedly arranged on one side of the frame (3); the rotating shaft (91) passes through one of the support rods (2) and is coaxially fixedly provided with a worm wheel (92); the support rods (95) are vertically fixed in pairs and are arranged outside one of the support rods (2); a worm gear (93) is rotatably provided on the support rod (95); the worm gear (93) is meshingly connected with the worm wheel (92); and a rocker (94) is fixedly provided at one end of the worm gear (93).

3. A photovoltaic support strength detection device according to claim 2, characterized in that: A cross beam (31) is fixedly provided inside the square frame (3), a hydraulic cylinder (34) is fixedly provided at the center of the lower side of the cross beam (31), and the downward pressure-applying end of the hydraulic cylinder (34) faces the middle of the second pressure-bearing beam (5).

4. A photovoltaic support strength detection device according to claim 3, characterized in that: A one-way laser rangefinder (35) is fixedly provided on the lower side of the cross beam (31) near the hydraulic cylinder (34), and the lower end of the one-way laser rangefinder (35) points vertically towards the second pressure-bearing beam (5).

5. A photovoltaic support strength detection device according to claim 4, characterized in that: The lower end of the first limiting column (32) is closely attached to and vertically penetrates the first pressure-bearing beam (4) and is then threadedly connected to a nut (36).

6. A photovoltaic support strength detection device according to claim 5, characterized in that: The support body (8) comprises purlins (81) installed at equal intervals in the transverse direction; when the square frame (3) is parallel to the diagonal support plane of the support body (8), the second pressure beam (5) is parallel to the purlin (81) and the first pressure beam (4) is perpendicular to the purlin (81); when the square frame (3) is parallel to the diagonal support plane of the support body (8), all rollers (67) on the first pressure beam (4) can correspond one-to-one with the measured nodes of the purlin (81); and all rollers (67) on the second pressure beam (5) can correspond one-to-one with the first pressure beam (4) on the upper side of the first pressure beam (4).

Images