Photovoltaic support and method for monitoring the state of connection

Abstract

The present application belongs to the technical field of mechanical vibration measurement based on monitoring the vibration condition of photovoltaic support, and particularly relates to a photovoltaic support and a connection state monitoring method. The vibration monitoring assembly of the photovoltaic support comprises a base, a cap, a transmission cylinder, an elastic collar and an elastic washer. The base is fixed on the top of the foundation pile and the axial flange at the upper end is provided with a plurality of arc-shaped arms. A sensor part capable of detecting the vibration condition of the arc-shaped arm is fixed on the arch surface of the arc-shaped arm, and the sensor part is connected with a control part. The lower part of the cap is fixedly connected with the base. The upper part of the cylinder body of the transmission cylinder is fixed on the cross bar, and a radial flange one is formed at the lower end and extends into the cap. The upper end of the arc-shaped arm is in contact with the upper part of the inner wall of the cylinder body. The inner and outer circumferential surfaces of the elastic collar are in contact with the outer circumferential surface of the cylinder body and the upper part of the inner wall of the cap, respectively. The elastic washer is arranged between the radial flange one and the opposite surface of the base. The present application can timely issue a warning when the photovoltaic support and the foundation pile are significantly loose.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic support, in particular to a photovoltaic support and a connection state monitoring method. BACKGROUND

[0002] After the photovoltaic panel is installed outdoors by the support, it will inevitably bear the impact of strong wind and airflow pressure frequently, and the load size, direction, duration, impact frequency and the like have variable characteristics. Therefore, the load conducted to the photovoltaic panel support from the photovoltaic panel also has alternating characteristics. When the photovoltaic support or photovoltaic panel installation support bears alternating load, the mechanical vibration frequency generated will change frequently, and when the vibration frequency generated due to bearing alternating load is close to or the same as the natural vibration frequency of the support, it will cause adverse effects on the connection firmness and reliability between the photovoltaic support and the pile. After long-term and frequent experience of resonance frequency effects, it is easy to cause the connection firmness between the photovoltaic support and the pile to loosen, which will pose a threat to the stable operation of the photovoltaic power station.

[0003] Since most of the distributed photovoltaic power stations are located in suburban open areas or high places, they are in a long-term unattended or inconveniently attended state. The connection loosening problem between the photovoltaic support and the pile is not easy to be detected by maintenance personnel in time, and there is also a lack of targeted monitoring means in the prior art. Therefore, when significant loosening problems occur between the photovoltaic support and the pile and are not discovered for a long time, it is easy to cause the photovoltaic panel to separate from the support part and the pile, and to cause major economic losses to the distributed photovoltaic power station. SUMMARY

[0004] In view of the problem that the prior art lacks monitoring means for the connection state between the photovoltaic support and the pile, the present application provides a photovoltaic support and a connection state monitoring method, which can monitor the connection firmness state between the photovoltaic support and the pile by monitoring the mechanical vibration state of the photovoltaic support, which helps to issue an early warning in time when significant loosening occurs between the photovoltaic support and the pile. In addition, by being connected to the Internet of Things, it can also provide remote supervision, maintenance guidance and the like, which helps to improve the informatization management level of the photovoltaic power plant, improve the maintenance operation efficiency, greatly inhibit the photovoltaic panel falling accidents, and can bring great economic benefits.

[0005] The technical solution adopted by the present application to solve the technical problems is: a photovoltaic support, comprising a hoop fixed on a pile, a pair of vertical arm rods, a pair of inclined arm rods, a plurality of connecting cross beams, and a vibration monitoring assembly.

[0006] Two vertical arm rods are arranged oppositely and are fixedly connected to the hoop at the lower part, and two inclined arm rods are also arranged oppositely and are also fixedly connected to the hoop at the lower part. The upper ends of the two vertical arm rods and the upper ends of the two inclined arm rods are fixedly connected to the connecting cross beam. A cross rod is arranged between the two vertical arm rods and above the pile, so that the cross rod is in contact with the top surface of the pile. Threaded holes are formed in the top surface of the pile.

[0007] The vibration monitoring assembly comprises a base, a cap, a transmission cylinder, an elastic sleeve and an elastic washer.

[0008] The base is fixed to the top of the pile. A sink is formed in the upper end surface of the base, and an axial flange extending vertically upward is formed in the bottom surface of the sink.

[0009] A plurality of arc-shaped arms are arranged in the circumferential direction on the axial flange and the arch surfaces of the arc-shaped arms are all directed to one side of the axial center line of the axial flange.

[0010] A sensor part capable of detecting the vibration amplitude and / or frequency of the arc-shaped arm is fixedly arranged on the arch surface of each arc-shaped arm, and each sensor part is connected to the control part. The control part can receive and analyze the sensing signals fed back by each sensor part.

[0011] The lower part of the cap is connected to the base. An annular flange extending radially inward is formed in the inner wall of the cap, and the annular flange is located above the base.

[0012] The transmission cylinder comprises a cylinder body, and the upper part of the cylinder body is fixedly connected to the cross rod.

[0013] A radial flange one extending radially outward is formed at the lower end of the cylinder body, the outer diameter of the radial flange one is greater than the inner diameter of the annular flange formed in the upper part of the cap, the outer diameter of the radial flange one is smaller than the inner diameter of the cap, and the lower end of the cylinder body can extend into the cap. The upper end of each arc-shaped arm is in contact with the upper part of the inner wall of the cylinder body.

[0014] The elastic sleeve is sleeved on the lower part of the cylinder body and above the radial flange one, and the inner and outer circumferential surfaces of the elastic sleeve are in contact with the outer circumferential surface of the cylinder body and the inner circumferential surface of the annular flange, respectively.

[0015] The elastic washer is fixedly arranged on the upper end surface of the base, and the upper and lower end surfaces of the elastic washer are in contact with the lower end surface of the radial flange one and the upper end surface of the base, respectively.

[0016] Optionally, the cross rod is made of fiber composite material. The cross rod comprises a first cross rod and a second cross rod, and the first cross rod and the second cross rod are fixedly arranged between the two vertical arm rods in front of and behind each other. The threaded holes arranged on the top surface of the pile are located between the opposite surfaces of the two cross rods.

[0017] Optionally, the first horizontal rod and the second horizontal rod are both L-shaped, and the vertical arm rod is located between the vertical plate part of the first horizontal rod and the vertical plate part of the second horizontal rod and is fixedly connected by bolts, and the flat plate part of the first horizontal rod and the flat plate part of the second horizontal rod are both in contact with the top surface of the foundation pile.

[0018] Optionally, the transmission cylinder further comprises a pair of rim plates formed on the upper part of the cylinder body and arranged opposite to each other in the front-rear direction.

[0019] The two rim plates correspond to the vertical plate parts of the first horizontal rod and the second horizontal rod respectively, and the two rim plates clamp the two vertical plate parts in the middle and are fixedly connected by bolts.

[0020] Optionally, the transmission cylinder further comprises a top wall formed on the upper end of the cylinder body. The two rim plates are fixedly formed on the front side and the rear side of the top wall.

[0021] Optionally, the transmission cylinder further comprises a top wall formed on the upper end of the cylinder body and a pair of rim plates formed on the front side and the rear side of the top wall. The cylinder body and the top wall can be integrally formed, or can be fixedly connected as a whole by one or more of welding, bonding, riveting and the like.

[0022] In the scheme in which the first horizontal rod and the second horizontal rod are not distinguished, and the scheme in which the structure of the horizontal rod is not limited, the transmission cylinder, or the cylinder body, is fixedly connected with one or two horizontal rods by a pair of rim plates arranged on the upper part thereof. In the scheme in which the horizontal rod is distinguished as the first horizontal rod and the second horizontal rod both in L-shaped structure, the transmission cylinder, or the cylinder body, is fixedly connected between the vertical plate part of the first horizontal rod and the vertical plate part of the second horizontal rod by a pair of rim plates arranged on the upper part thereof. At this time, the two rim plates correspond to the vertical plate parts of the two horizontal rods respectively, and the upper part of the transmission cylinder is tightly clamped between the two vertical plate parts. Finally, after the rim plates, or the upper part of the transmission cylinder, and the vertical plate parts of the two horizontal rods are fixed together by a bolt assembly, a stable and reliable fixed connection relationship is formed between the transmission cylinder and the two horizontal rods, which is conducive to the conduction of mechanical vibration and helps to make the monitoring result more accurate and reliable.

[0023] Optionally, a plurality of annular flanges are arranged on the inner side of the rim plate and distributed along the length direction of the rim plate.

[0024] The annular flanges on the two rim plates correspond to each other in the front-rear direction, and a rubber end cap is sleeved on the end part of each annular flange.

[0025] The free end face of the rubber end cap is in extrusion contact with the front side or the back side of the vertical plate part after the two edge plates sandwich the two vertical plate parts. Or the free end face of the rubber end cap is in extrusion contact with the inner side or the outer side of the vertical plate part after the two edge plates sandwich the two vertical plate parts.

[0026] The extension length of the annular flange in the front-back direction does not need to be too large, as long as it can stably set the fixed rubber end cap. The relative extension length of the free end face of the rubber end cap to the front or to the back of the end part of the annular flange is controlled within 5 mm, preferably 2-3 mm.

[0027] Optionally, the abutment is annular and the outer diameter is consistent with the inner diameter of the cap. An annular groove is formed at the lower part of the outer circumferential surface of the abutment.

[0028] An annular protrusion is formed at the lower part of the inner wall of the cap, and an annular elastic deformation thin wall area is formed at the lower part of the outer wall of the cap. The elastic deformation thin wall area can elastically deform when the annular protrusion bears radial force, so as to cause the lower port of the cap to expand, so that the annular protrusion and the annular groove establish a clamping matching relationship, and the cap and the abutment are fixedly connected.

[0029] The annular protrusion and the annular groove are in a profile contact matching relationship.

[0030] Optionally, an annular groove is formed at the lower part of the outer circumferential surface of the barrel body and above the radial flange one. After the elastic sleeve ring is sleeved on the barrel body, the inner circumferential surface of the elastic sleeve ring is in contact with the bottom surface of the annular groove. Preferably, the bottom surface of the annular groove is inclined and inclined from bottom to top towards the direction close to the axial line of the barrel body. Correspondingly, the inner circumferential surface of the elastic sleeve ring is formed as a conical surface, and the conical surface can be in full contact with the bottom surface of the annular groove.

[0031] Optionally, an annular cavity is formed on the wall of the elastic sleeve ring. The upper end of the annular cavity is a closed end, the lower end is an open end, and the lower port of the annular cavity extends to the lower end surface of the elastic sleeve ring. An annular groove is formed at the upper end surface of the elastic sleeve ring and directly above the annular cavity. The radial cross section of the annular groove is V-shaped.

[0032] The port width of the annular groove can be not greater than the radial width of the upper part / top of the annular cavity.

[0033] Preferably, the radial width of the annular cavity gradually increases from the lower port to the inner bottom surface.

[0034] The present application relates to a kind of photovoltaic support connection state monitoring method, based on the photovoltaic support described above, including the following steps:

[0035] I, sensor part real-time monitoring and the mechanical vibration condition of the respective matching arc-shaped arm, sends corresponding sensing signal;

[0036] II. The control part receives and processes the sensing signals fed back by each sensor part in real time to obtain the mechanical vibration amplitude value and the mechanical vibration frequency value of the photovoltaic support at each arc-shaped arm position;

[0037] III. The control part compares the real-time obtained mechanical vibration amplitude value and / or the real-time obtained mechanical vibration frequency value with the preset amplitude warning threshold and the preset vibration frequency warning threshold respectively, and makes a warning judgment according to the comparison result.

[0038] When the mechanical vibration amplitude value fed back by the photovoltaic support at at least one position exceeds the preset amplitude warning threshold, the control part sends an alarm instruction, at this time, through the remote monitoring platform connected with the control part through the Internet of Things, the alarm prompt can be given on the display screen through the flashing light;

[0039] When the mechanical vibration amplitude values fed back by the photovoltaic support at multiple positions all exceed the preset amplitude warning threshold, the control part sends an urgent alarm instruction, at this time, through the remote monitoring platform connected with the control part through the Internet of Things, the alarm prompt can be given on the display screen through the high-frequency flashing light and / or the buzzer alarm.

[0040] When the mechanical vibration frequency value fed back by the photovoltaic support at at least one position exceeds the preset vibration frequency warning threshold, the control part sends an alarm instruction;

[0041] When the mechanical vibration frequency values fed back by the photovoltaic support at multiple positions all exceed the preset vibration frequency warning threshold, the control part sends an urgent alarm instruction.

[0042] The control part comprises a calculation processing module, a noise reduction module, a communication module, a power module and the like.

[0043] The beneficial effects of the present application are: the present application can monitor the connection firmness between the photovoltaic support and the pile by monitoring the mechanical vibration state of the photovoltaic support, which helps to send a warning signal in time before significant loosening occurs between the photovoltaic support and the pile, accurately and timely guides the repair work, significantly improves the repair work efficiency, and reduces the economic loss of the power station.

[0044] The present application monitors the installation state of the photovoltaic panel by monitoring whether the connection structure between the photovoltaic support and the upper part of the pile is loose. After connecting with the remote management system through wired communication and / or wireless communication, it is helpful to accurately monitor and manage the connection and fixing state of each photovoltaic panel in the power plant, accurately find the loosening connection position, reduce the troubleshooting difficulty, and improve the repair efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 It is a front view structural schematic diagram of the existing photovoltaic support.

[0046] Figure 2 This is a top view of the photovoltaic support structure of the present invention (the inclined arm, connection, base, etc. are not shown).

[0047] Figure 3 This is a cross-sectional structural diagram of the vibration monitoring assembly in the photovoltaic support of the present invention.

[0048] Figure 4 This is a schematic diagram of the split structure of the vibration monitoring assembly in the photovoltaic bracket of the present invention.

[0049] Figure 5 This is a top view of the ring bracket structure.

[0050] Figure 6 This is a schematic diagram of the main structure of the transmission cylinder.

[0051] Figure 7 This is a top view of the transmission cylinder.

[0052] Figure 8 This is a schematic diagram of the improved structure of the cap.

[0053] Figure 9 This is a top view schematic diagram of an improved design for the elastic collar.

[0054] Figure 10 This is a cross-sectional structural diagram of the improved scheme two for the elastic collar.

[0055] Figure 11 for Figure 10 A magnified schematic diagram of the structure at point A in the middle.

[0056] In the diagram: 10 Foundation pile, 11 Threaded hole, 20 Clamp 1, 30 Clamp 2, 40 Vertical boom, 41 Horizontal bar, 411 First horizontal bar, 412 Second horizontal bar, 413 Bolt assembly, 50 Diagonal boom, 60 Connecting beam; 70 Base, 71 Through hole structure, 72 Axial flange, 721 Countersunk hole, 722 Slot, 73 Arc arm, 731 Column, 74 Strain sensor, 75 Rubber gasket, 76 Annular groove, 77 Annular bracket, 771 Insert arm, 772 Radial flange arm; 80 cap, 81 hole one, 82 hole two, 83 annular protrusion, 84 elastically deformable thin-walled area, 85 slot; 90 transmission cylinder, 91 cylinder body, 911 radial flange one, 912 annular groove, 913 straight groove, 914 radial flange two, 92 top wall, 93 strip flange plate, 931 annular flange, 932 top plate; 100 elastic collar, 101 conical surface, 102 locking block, 103 annular cavity, 104 annular recess; 200 elastic washer. Detailed Implementation

[0057] The structure, proportion, size, etc. shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification, to be understood and read by those skilled in the art, and do not have technical significance to limit the conditions that the application can be implemented. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effect and purpose that the application can produce, should still fall within the scope of the technology disclosed by the application.

[0058] As shown in Figures 1 to 4 A photovoltaic support includes a pair of clamps, a pair of vertical arm rods, a pair of inclined arm rods, a plurality of connecting beams, and a vibration monitoring assembly. The clamps include clamp one 20 and clamp two 30, and the clamp one 20 and the clamp two 30 are arranged opposite to each other in an up-down manner and are fixed to the upper part of the pile 10. The clamp two 30 is located above the clamp one 20, and the clamp two 30 is spaced apart from the top surface of the pile 10 by a vertical distance.

[0059] The two vertical arm rods 40 are arranged opposite to each other in a left-right manner and extend in a vertical direction, and the lower ends of the vertical arm rods 40 are fixedly connected to the clamp one 20 and the middle-lower parts are fixedly connected to the clamp two 30.

[0060] The two inclined arm rods 50 are also arranged opposite to each other in a left-right manner and extend obliquely upward to the left and right, respectively, and the lower ends of the inclined arm rods 50 are fixedly connected to the clamp one 20.

[0061] The two vertical arm rods 40 are located between the two inclined arm rods 50, and finally the left vertical arm rod 40 and the left inclined arm rod 50 are symmetric about the axis of the pile 10 with respect to the right vertical arm rod 40 and the right inclined arm rod 50.

[0062] The connecting beams 60 are fixedly connected to the upper ends of the vertical arm rods 40 and the upper ends of the inclined arm rods 50.

[0063] A cross rod 41 is arranged between the two vertical arm rods 40 and above the pile 10, and the cross rod 41 is in contact with the top surface of the pile 10 to limit the installation height of the photovoltaic support with respect to the pile 10.

[0064] At least the crossbar 41 can be made of a fiber composite material. The fiber composite material, also known as a composite fiber material, is within the scope of the prior art and will not be described in detail. The crossbar 41 made of the fiber composite material can significantly improve its toughness and strength and is not prone to breakage.

[0065] One or more of the upright arm 40, the inclined arm plate 50 and the connecting crossbeam 60 can also be made of a fiber composite material. This can improve the corrosion resistance, toughness and strength of the photovoltaic support and prevent breakage.

[0066] The crossbar 41 includes a first crossbar 411 and a second crossbar 412. The first crossbar 411 and the second crossbar 412 are fixed between the two upright arms 40. Threaded holes 11 are formed on the top surface of the pile 10. The threaded holes 11 are located between the opposite surfaces of the first crossbar 411 and the second crossbar 412.

[0067] The first crossbar 411 and the second crossbar 412 are both L-shaped. The upright plate part of the crossbar 41 is fixedly connected to the upright arm 40 by a bolt. The flat plate part of the crossbar 41 is in contact with the top surface of the pile 10.

[0068] As shown in Figures 3 to 7 The vibration monitoring assembly includes a base 70, a cap 80, a transmission cylinder 90, an elastic collar 100 and an elastic washer 200.

[0069] A through hole structure 71 is formed at the center of the base 70. A bolt is matched with the through hole structure 71. The bolt is matched with the threaded hole 11 on the pile 10. The base 70 is fixed on the top surface of the pile 10. A sink is formed on the upper end surface of the base 70. An axial flange 72 is formed on the bottom surface of the sink. A rubber washer 75 is fixed on the lower end surface of the base 70 and located at the periphery of the through hole structure 71. The rubber washer 75 protrudes outward relative to the lower end surface of the base 70. When the base 70 is fixed on the top surface of the pile 10, the rubber washer 75 is deformed by being pressed. This can improve the firmness and reliability of the connection between the base 70 and the pile 10.

[0070] Four arc-shaped arms 73 are evenly distributed around the circumference of the axial flange 72. The arch surfaces of the arc-shaped arms 73 are all directed to the side of the axial center line of the axial flange 72.

[0071] A sensor part (i.e. strain sensor 74) capable of detecting the vibration amplitude and frequency of the arc-shaped arm 73 is fixed on the arch surface of each arc-shaped arm 73, and each sensor part is connected with a control part (not shown in the figure). The control part can receive and analyze the sensor signals fed back by each sensor part.

[0072] The arc-shaped arm 73 is made of elastic material, which can be elastic composite fiber material or metal material. When made of metal material, an insulating coating needs to be provided on the surface.

[0073] A counterbore 721 is formed on the upper end of the axial flange 72, and a plurality of insertion slots 722 are distributed on the inner circumferential surface of the counterbore 721. Correspondingly, an annular bracket 77 (see Figure 5 ) is arranged on the upper part of the axial flange 72, and the annular bracket 77 is sunk in the lower part of the counterbore 721. A plurality of radially outwardly extending insertion arms 771 are arranged on the annular bracket 77. The insertion arms 771 are matched with the insertion slots 722 one by one, so that the annular bracket 77 is suspended in the middle part of the axial flange 72. A plurality of radial rim arms 772 are arranged on the inner circumferential surface of the annular bracket 77, and are arranged alternately in the circumferential direction. The housing of the control part can be clamped on the radial rim arms 772, so that the control part is suspended and fixed in the middle or lower part of the inner cavity of the axial flange 72.

[0074] The lower part of the cap 80 is connected with the base 70 in a plug-in manner.

[0075] The base 70 is annular, and its outer diameter is consistent with the inner diameter of the cap 80 (i.e. the inner diameter of the hole part two 82). An annular groove 76 is formed on the lower part of the outer circumferential surface of the base 70.

[0076] An annular protrusion 83 is formed on the lower part of the inner wall of the cap 80, and an annular elastic deformation thin wall area 84 is formed on the lower part of the outer wall of the cap 80. The elastic deformation thin wall area 84 can be elastically deformed when the annular protrusion 83 is subjected to a radial compression force, so as to cause the inner diameter of the lower end of the cap 80 to expand, and the annular protrusion 83 and the annular groove 76 are matched in a clamping manner, so as to realize the fixed connection between the cap 80 and the base 70.

[0077] The annular protrusion 83 and the annular groove 76 are in a profile contact matching relationship.

[0078] In other embodiments, the cap 80 and the base 70 can be fixedly connected through a flange structure, and can also be fixedly connected through a plurality of bolts or screws arranged alternately in the circumferential direction.

[0079] The inner wall of the cap 80 is formed with a ring-shaped flange extending radially inward. After the cap 80 is fixedly inserted on the upper portion of the base 70, the ring-shaped flange is located above the base 70.

[0080] The transmission cylinder 90 includes a cylinder body 91, a top wall 92 formed on the upper end of the cylinder body 91, and a pair of strip-shaped flanges 93 formed on the front side and the rear side of the top wall 92.

[0081] The cylinder body 91 and the top wall 92 can be integrally formed; or can be fixedly connected as a whole by one or more of welding, bonding, riveting, etc. Similarly, the top wall 92 and the strip-shaped flanges 93 can be integrally formed; or can be fixedly connected as a whole by one or more of welding, bonding, riveting, etc.

[0082] The upper end of the two strip-shaped flanges 93 is formed with a top plate 932 extending through the entire length direction of the strip-shaped flanges 93, so as to cover the upper portions of the two strip-shaped flanges 93 and cover the main body portion of the vibration monitoring assembly, thereby preventing rainwater from entering and wetting the main body portion of the vibration monitoring assembly.

[0083] The left and right ends of the top plate 932 are also formed with downwardly extending shielding plates, which extend into the space between the two vertical plate portions. The lower end of the shielding plate and the top surface of the base 10 are vertically spaced apart, and the front and rear sides of the shielding plate and the inner sides of the two vertical plate portions are also spaced apart.

[0084] The lower end of the cylinder body 91 is formed with a radial flange 911 extending radially outward, so that the outer diameter of the radial flange 911 is greater than the inner diameter of the ring-shaped flange formed on the upper portion of the cap 80 (i.e. greater than the inner diameter of the illustrated hole portion 81), and the outer diameter of the radial flange 911 is less than the inner diameter of the cap 80 (i.e. less than the inner diameter of the illustrated hole portion 82), so that the lower end of the cylinder body 91 can extend into the cap 80, and the cylinder body 91 and the cap 80 are not easily separated when the transmission cylinder 90 moves upward.

[0085] The upper end of each arc-shaped arm 73 is in contact with the upper portion of the inner wall of the cylinder body 91. In the illustrated embodiment, four straight grooves 913 are formed in the upper portion of the inner wall of the cylinder body 91 and are distributed at intervals around the circumference. The upper end of each arc-shaped arm 73 is inserted into the straight groove 913 and is in contact with the bottom wall of the straight groove 913. When the arc-shaped arm 73 is subjected to mechanical vibration due to the compression of the cylinder body 91, the upper end of the arc-shaped arm 73 can slide in the vertical direction or in the axial direction relative to the straight groove 913, so that the arc-shaped arm 73 is elastically deformed and the strain sensor 74 fixed to the arc-shaped arm 73 emits a strain sensing signal.

[0086] To reduce the frictional resistance between the arc-shaped arm 73 and the inner wall of the cylinder body 91 and to prevent the arc-shaped arm 73 from being stuck relative to the inner wall of the cylinder body 91 during sliding, which would affect the conduction authenticity of mechanical vibration and cause adverse effects on the monitoring results, a cylindrical body 731 or a spherical body is formed at the upper end of the arc-shaped arm 73. The curved surface / side wall of the cylindrical body 731 or the curved surface of the spherical body is in tangential contact with the inner wall of the cylinder body 91 or with the bottom wall of the straight groove 913.

[0087] To prevent the upper end of the arc-shaped arm 73 from easily sliding out of the lower end of the straight groove 913, a radial flange 914 is formed in the middle portion of the inner wall of the cylinder body 91 and below the straight groove 913. The radial cross-section of the radial flange 914 is in the shape of a right-angled triangle and the hypotenuse extends obliquely from the lower end to the upper end and towards the side close to the axis of the cylinder body 91.

[0088] The transmission cylinder 90 is fixedly connected to the first cross bar 411 and the second cross bar 412 through a pair of strip-shaped flange plates 93 arranged at the upper portion of the transmission cylinder 90, so that the transmission cylinder 90 (through the two vertical arm rods 40) is fixedly connected to the main body of the photovoltaic support. As shown in Figure 2 the strip-shaped flange plates 93 are fixedly connected to the first cross bar 411 and the second cross bar 412 through the bolt assembly 413. The side surface of the strip-shaped flange plate 93 is in contact with the side surface of the vertical plate portion of the cross bar 41.

[0089] Two said strip-shaped edge plates 93 are respectively matched with the vertical plate parts of the first horizontal rod 411 and the second horizontal rod 412, so that the upper part of the transmission cylinder 90 is tightly clamped between the two vertical plate parts, and finally the upper part of the transmission cylinder 90 or the strip-shaped edge plate 93 is fixed with the vertical plate parts of the first horizontal rod 411 and the second horizontal rod 412 by the bolt assembly 413, so that a stable and reliable fixed connection relationship is formed between the transmission cylinder 90 and the horizontal rod 41, which is beneficial to the conduction of mechanical vibration and helps to make the monitoring result more accurate and reliable. It should be emphasized that the so-called tightly clamping the upper part of the transmission cylinder 90 between the two vertical plate parts can be understood as the implementation condition that the two strip-shaped edge plates 93 are clamped between the two vertical plate parts, or the implementation condition that the two vertical plate parts are clamped in the middle by the two strip-shaped edge plates 93, or the implementation condition that one strip-shaped edge plate 93 is between the two vertical plate parts and the other strip-shaped edge plate 93 is outside one vertical plate part, etc.

[0090] Figures 2 to 7 The implementation condition that the two vertical plate parts are clamped in the middle by the two strip-shaped edge plates 93 is shown. A plurality of annular flanges 931 are arranged on the strip-shaped edge plate 93 and distributed along the length direction of the strip-shaped edge plate 93. The annular flanges 931 extend in the front-rear direction and have through holes formed at the bottom of the annular flanges 931. A rubber sleeve cap is sleeved on the annular flanges 931. The rubber sleeve cap has hole parts through which bolt rods pass. The bolt rods in the bolt assembly 413 can pass through the two annular flanges 931 arranged on the two vertical plate parts and opposite to each other, and the through hole arranged on the vertical arm rod 40 (the vertical arm rod 40 is located between the two vertical plate parts opposite to each other), so as to fixedly connect the strip-shaped edge plate 93, the first horizontal rod 411, the second horizontal rod 412 and the vertical arm rod 40 into a whole. At this time, the free end face of the rubber sleeve cap is in contact (extrusion contact) with the outer side face of the vertical plate part, has the ability of buffering and absorbing vibration, can inhibit the connection structure between the transmission cylinder 90 and the horizontal rod 41 from being easily loosened, and can form a stable and reliable fixed connection structure between the strip-shaped edge plate 93 and the vertical plate part.

[0091] The elastic sleeve ring 100 is sleeved on the lower part of the cylinder body 91 and is located above the radial flange one 911, and the inner and outer circumferential surfaces of the elastic sleeve ring 100 are in contact with the outer circumferential surface of the cylinder body 91 and the inner circumferential surface of the annular flange, respectively.

[0092] The elastic gasket 200 is fixedly arranged on the upper end face of the base 70, and the upper and lower end faces of the elastic gasket 200 are in contact with the lower end face of the radial flange one 911 and the upper end face of the base 70, respectively.

[0093] The main part of the vibration monitoring assembly extends between the opposite faces of the first cross bar 411 and the second cross bar 412, i.e. between the two front and back vertical plate parts. Only the upper part of the transmission cylinder 90, i.e. the top wall 92 and part or all of the strip-shaped flange plate 93, is exposed outside the vertical plate parts. A radial spacing is formed between the outer circumferential surface of the cap 80 and the inner side surface of the vertical plate parts to prevent the main part of the vibration monitoring assembly from colliding with the cross bars 41, i.e. the vertical plate parts, and adversely affecting the monitoring effect on the mechanical vibration of the photovoltaic support.

[0094] In the above scheme, the transmission cylinder 90 is fixedly connected with the first cross bar 411 and the second cross bar 412 through the two strip-shaped flange plates 93, so that the transmission cylinder 90 is fixedly connected with the main body of the photovoltaic support, and the mechanical vibration of the photovoltaic support can be fully transmitted to the transmission cylinder 90. The base 70 is fixedly connected with the base pile 10, and the upper free end of the arc-shaped arm 73 fixedly connected with the base 70 is in contact with the inner wall of the cylinder body 91 of the transmission cylinder 90. Meanwhile, the elastic sleeve ring 100 is arranged between the cap 80 and the cylinder body 91 to give the cylinder body 91 or the transmission cylinder 90 a radial moving space, and the elastic washer 200 is arranged between the lower end of the cylinder body 91 and the upper end of the base 70 to give the cylinder body 91 or the transmission cylinder 90 an axial moving space. Finally, the mechanical vibration of the photovoltaic support can be converted into the mechanical vibration of each arc-shaped arm 73 by the transmission cylinder 90, and the mechanical vibration is detected by the sensor part arranged on the arc-shaped arm 73 and fed back to the control part. After analysis and processing by the control part, the mechanical vibration of the photovoltaic support, including but not limited to the vibration amplitude and frequency of the photovoltaic support in different directions, can be obtained.

[0095] To increase the connection firmness between the elastic sleeve ring 100 and the cylinder body 91 and prevent the elastic sleeve ring 100 from moving up and down relative to the cylinder body 91 and being separated from the cylinder body 91 and the hole part 81, as shown in Figs. 9 and 10, an annular groove 912 is formed on the outer circumferential surface of the cylinder body 91 below and above the radial flange 911. After the elastic sleeve ring 100 is sleeved on the cylinder body 91, the inner circumferential surface of the elastic sleeve ring 100 can be in full contact with the bottom surface of the annular groove 912. Figure 3 、 Figure 4 To increase the connection firmness between the elastic sleeve ring 100 and the cylinder body 91 and prevent the elastic sleeve ring 100 from moving up and down relative to the cylinder body 91 and being separated from the cylinder body 91 and the hole part 81, as shown in Figs. 9 and 10, an annular groove 912 is formed on the outer circumferential surface of the cylinder body 91 below and above the radial flange 911. After the elastic sleeve ring 100 is sleeved on the cylinder body 91, the inner circumferential surface of the elastic sleeve ring 100 can be in full contact with the bottom surface of the annular groove 912.

[0096] To further enhance the axial restriction capability of the annular groove 912 to the elastic collar 100. Preferably, the bottom surface of the annular groove 912 is inclined and inclined from bottom to top towards the direction close to the axial centerline of the barrel body 91. Correspondingly, the inner circumferential surface of the elastic collar 100 is formed as a conical surface 101, and the conical surface 101 can be in full contact with the bottom surface of the annular groove 912.

[0097] To prevent the elastic collar 100 from rotating relative to the cap 80, and at the same time can play a role in inhibiting the elastic collar 100 from moving along the vertical direction relative to the cap 80. As shown in Figure 8 、 Figure 9 A plurality of clamping grooves 85 are arranged at the upper end of the cap 80, that is, the clamping grooves 85 are formed at the upper end of the hole part 81. Correspondingly, a plurality of clamping blocks 102 are arranged on the outer circumferential surface of the elastic collar 100. The clamping grooves 85 and the clamping blocks 102 are one-to-one corresponding and matched, and are formed in a profile contact matching relationship. Preferably, the clamping grooves 85 are dovetail grooves, and correspondingly, the clamping blocks 102 are formed as dovetail blocks.

[0098] To improve the radial elastic deformation capability of the elastic collar 100, especially to improve the radial elastic deformation capability of the upper part of the elastic collar 100. As shown in Figure 10 and Figure 11 An annular cavity 103 is formed on the wall of the elastic collar 100. The upper end of the annular cavity 103 is a closed end, the lower end is an open end, and the lower end extends to the lower end surface of the elastic collar 100. At the same time, a ring-shaped depression 104 is formed on the upper end surface of the elastic collar 100 and directly above the annular cavity 103. The cross section of the ring-shaped depression 104 is V-shaped. The port width of the ring-shaped depression 104 is not greater than the radial width of the upper / top part of the annular cavity 103. Preferably, the radial width of the annular cavity 103 gradually increases from the lower port to the inner bottom surface.

[0099] The elastic collar 100 and the elastic gasket 200 are made of elastic material, so that their wall thickness itself has a certain elastic deformation capability. By providing the annular cavity 103 on the wall of the elastic collar 100 and the annular depression 104 on the top surface / upper end surface, not only can the elastic deformation capability of the elastic collar 100 be improved, the energy required to cause the elastic deformation of the elastic collar 100 can be reduced, the sensitivity and accuracy of monitoring the mechanical vibration condition of the (photovoltaic support) can be improved, but also helps to reduce the radial wall thickness of the elastic collar 100, so that the radial size of the cap 80 and the barrel body 91 can be relatively reduced.

[0100] Similarly, to improve the deformation ability of the elastic gasket 200, a ring-shaped groove structure can be arranged on the upper end surface and / or the lower end surface of the elastic gasket 200.

[0101] As shown in the scheme, Figure 3 , Figure 4 As shown in the scheme, an axially extending ring-shaped flange portion is formed on the lower end of the elastic gasket 200. A counterbore 721 is formed on the upper end of the axial flange 72. The ring-shaped flange portion on the elastic gasket 200 can be inserted into the counterbore 721. A gasket made of elastic material can also be arranged between the upper end surface of the radial flange 911 and the lower end surface of the ring-shaped flange of the cover plate 80, and the gasket is preferably a ring-shaped gasket.

[0102] The above embodiments are only illustrative of the principles and effects of the present application, and are not intended to limit the present application. The present application can be modified or changed in many aspects without departing from the general idea, and those skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical idea of the present application should be covered by the claims of the present application.

Claims

1. A photovoltaic support structure, comprising a clamp fixed to a foundation pile (10), a pair of vertical booms (40), a pair of diagonal booms (50), and a connecting beam (60); the two vertical booms (40) and the two diagonal booms (50) are arranged opposite each other on the left and right sides and their lower parts are fixedly connected to the clamp; the connecting beam (60) is fixedly connected to the upper end of the vertical booms (40) and the upper end of the diagonal booms (50), respectively; a crossbar (41) is fixedly provided between the two vertical booms (40) and above the foundation pile (10); characterized in that: It also includes a vibration monitoring assembly; the vibration monitoring assembly includes a base (70), an annular cap (80), a transmission cylinder (90), an elastic collar (100), and an elastic washer (200). The base (70) is fixed to the top of the pile (10); an axial flange (72) extending vertically upward is formed on the upper end face of the base (70); multiple arc-shaped arms (73) are arranged alternately around the circumference on the axial flange (72) and the arch surface of each arc-shaped arm (73) faces the axis of the axial flange (72); a sensor part capable of detecting the vibration status of the corresponding arc-shaped arm (73) is fixed on the arch surface of each arc-shaped arm (73) and each sensor part is connected to the control part; the control part can receive and analyze the sensing signals fed back by each sensor part; The lower part of the cap (80) is fixedly connected to the base (70); the upper part of the inner wall of the cap (80) has an annular flange extending radially inward, and the annular flange is positioned above the base (70); The transmission cylinder (90) includes a cylinder body (91) and the upper part of the cylinder body (91) is fixedly connected to the crossbar (41); a radial flange (911) extending radially outward is formed at the lower end of the cylinder body (91), such that the outer diameter of the radial flange (911) is larger than the inner diameter of the annular flange and smaller than the inner diameter of the cap (80); the lower end of the cylinder body (91) extends into the cap (80); the upper ends of the arc-shaped arms (73) are in contact with the upper part of the inner wall of the cylinder body (91); The elastic collar (100) is sleeved on the lower part of the cylindrical body (91) and located above the radial flange (911), and the inner and outer peripheral surfaces of the elastic collar (100) are in contact with the outer peripheral surface of the cylindrical body (91) and the inner peripheral surface of the annular flange, respectively. The elastic washer (200) is fixed on the upper end face of the base (70) and the upper and lower end faces of the elastic washer (200) are in contact with the lower end face of the radial flange (911) and the upper end face of the base (70), respectively.

2. The photovoltaic support according to claim 1, characterized in that: The crossbar (41) is made of fiber composite material; the crossbar (41) includes a first crossbar (411) and a second crossbar (412), so that the first crossbar (411) and the second crossbar (412) are fixed between the two vertical arm bars (40) alternately. The upper part of the cylinder body (91) is located between the first crossbar (411) and the second crossbar (412), and is fixedly connected to the first crossbar (411) and the second crossbar (412).

3. The photovoltaic support according to claim 2, characterized in that: Both the first horizontal bar (411) and the second horizontal bar (412) are L-shaped, so that the vertical arm (40) is located between the vertical plate part of the first horizontal bar (411) and the vertical plate part of the second horizontal bar (412) and is fixedly connected by bolts, so that the flat plate part of the first horizontal bar (411) and the flat plate part of the second horizontal bar (412) are in contact with the top surface of the foundation pile (10).

4. The photovoltaic support according to claim 3, characterized in that: The transmission cylinder (90) also includes a pair of flanges formed on the upper part of the cylinder body (91) and the two flanges are arranged opposite each other front to back; The two edge plates correspond to the upright plate portion of the first crossbar (411) and the upright plate portion of the second crossbar (412), respectively, and the two edge plates clamp the two upright plate portions in the middle and are fixedly connected with bolts.

5. The photovoltaic support according to claim 4, characterized in that: The transmission cylinder (90) also includes a top wall (92) formed at the upper port of the cylinder body (91); two flanges are fixedly formed on the top wall (92); A top plate (932) is formed at the upper end of the rim plate, extending through the entire length of the rim plate.

6. The photovoltaic support according to claim 3 or 4, characterized in that: Multiple annular flanges (931) are provided alternately on the inner side of the flange and along the length of the flange; the annular flanges (931) extend in the front-back direction and have through holes for bolts to pass through on the bottom surface of the annular flanges (931); The annular flanges (931) on the two flange plates are positioned one to one and opposite to each other, and each annular flange (931) is fitted with a rubber end cap at its end; the rubber end cap has a hole for the bolt to pass through. After the two edge plates sandwich the two upright plates in the middle, the free end face of the rubber end cap is pressed into contact with the front or rear side of the upright plate.

7. The photovoltaic support according to claim 1, characterized in that: The base (70) is annular and its outer diameter is the same as the inner diameter of the cap (80); an annular groove (76) is formed on the lower part of the outer peripheral surface of the base (70). An annular protrusion (83) is formed on the lower part of the inner wall of the cap (80), and an annular elastic deformation thin-walled region (84) is formed on the lower part of the outer wall of the cap (80). The elastic deformation thin-walled region (84) can undergo elastic deformation when the annular protrusion (83) is subjected to radial force, so as to cause the lower end of the cap (80) to expand, so that the annular protrusion (83) and the annular groove (76) can be engaged and matched.

8. The photovoltaic support according to claim 1, characterized in that: An annular groove (912) is formed on the lower part of the outer peripheral surface of the cylindrical body (91) and above the radial flange (911); after the elastic collar (100) is fitted onto the cylindrical body (91), the inner peripheral surface of the elastic collar (100) can contact the bottom surface of the annular groove (912).

9. The photovoltaic support according to claim 1 or 8, characterized in that: An annular cavity (103) is formed on the wall of the elastic collar (100); the upper end of the annular cavity (103) is a closed end, the lower end is an open end, and the lower port of the annular cavity (103) extends to the lower end face of the elastic collar (100). An annular groove (104) is formed on the upper end face of the elastic collar (100) and directly above the annular cavity (103).

10. A method for monitoring the connection status of a photovoltaic support based on the photovoltaic support structure described in any one of claims 1 to 8, characterized in that, Includes the following steps: Ⅰ. The sensor unit monitors the mechanical vibration of its respective matched arc arm (73) in real time and sends out corresponding sensing signals; II. The control unit receives and processes the sensing signals fed back from each sensor unit in real time to obtain the mechanical vibration amplitude and mechanical vibration frequency values ​​of the photovoltaic bracket at the positions of each arc arm (73). III. The control unit compares the real-time mechanical vibration amplitude value and / or the real-time mechanical vibration frequency value with the preset amplitude warning threshold and the preset vibration frequency warning threshold, respectively, and makes a warning judgment based on the comparison results.

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