Droop corrector for photovoltaic main shaft connection part

Abstract

The utility model belongs to the technical field of photovoltaic equipment, and particularly relates to a droop corrector for a photovoltaic main shaft connection part, which comprises a hoop main body and a correcting piece, a photovoltaic main shaft installation area is formed between the hoop main body and the correcting piece, and the correcting piece is composed of a first horizontal supporting piece and two identical second horizontal supporting pieces. The two second horizontal supporting pieces are perpendicularly and fixedly arranged at the centers of the two side walls of the first horizontal supporting piece correspondingly, the first horizontal supporting piece and the two second horizontal supporting pieces form a cross-shaped structure, and the positions, close to the two ends, of the bottom of the first horizontal supporting piece are symmetrically and integrally connected with two supporting protruding blocks. The two supporting protruding blocks are arranged on the two sides of the two adjacent photovoltaic connecting positions respectively, mounting holes are formed in the tops of the second horizontal supporting pieces, and the two ends of the hoop body penetrate through the corresponding mounting holes respectively and are in threaded connection with locknuts. The inclined single-shaft support can be arranged in the east-west direction, and the motor rotates in the single direction to drive the inclined single-shaft support to rotate in the east-west direction.

Description

Technical Field

[0001] The utility model belongs to the technical field of photovoltaic equipment, and in particular relates to a sag corrector used at a connection of a photovoltaic main shaft. Background Art

[0002] At present, the connection between the photovoltaic main shafts on the photovoltaic tracking bracket is mainly achieved by the following method: the two main shafts are bolted together through the main shaft clamp, through holes are drilled on one side of the main shaft and on both sides of the clamp, the clamp holds the two main shafts together, and connects them through through bolts. The clamp is then self-locked by bolts to fix the two main shafts.

[0003] In the actual installation at the project site, after the main shaft clamp is installed, the clamp bolts do not reach the pre-tightening force, and there is a misalignment between the two main shafts, which often causes the connection between the clamp and the main shaft to be loose. Under the drive of the drive device, the main shafts rotate together. In the case of a large photovoltaic module array, multiple main shafts are bolted through the clamp, and the cumulative error increases accordingly, which can easily cause the misalignment between the main shafts to be further aggravated. At the same time, it makes the photovoltaic panels on the main shaft connection more likely to be misaligned, affecting the synchronization of the photovoltaic panels on both sides of the main shaft clamp connection. During the rotation of the photovoltaic module, there is friction and noise between the two main shafts and the clamp, and the zinc layer on the surface is damaged, which affects the anti-rust effect and creates corresponding safety hazards. At the same time, it affects the power generation efficiency of the tracking bracket photovoltaic module.

[0004] For example, a Chinese patent with patent publication number CN221921725U discloses a photovoltaic main shaft connection structure and a photovoltaic system, including a first main shaft and a second main shaft. The structure of the side where the first main shaft and the second main shaft are connected is the same. The end of the second main shaft connected to the first main shaft is formed after shrinking processing. The size of the connection part is smaller than the size of the first main shaft. A plurality of first connection holes are opened on the connection part. A plurality of second connection holes are opened on the end where the first main shaft and the second main shaft are connected. The first connection hole and the second connection hole are both set as rectangular holes. The first connection hole and the second connection hole are connected by T-bolts. When the first main shaft and the second main shaft are connected, the connection part on the second main shaft extends into the interior of the first main shaft and is fixed by T-bolts, effectively increasing the contact area between the outer wall of the connection part and the interior of the first main shaft, thereby further increasing the friction force, ensuring the connection strength, and improving the torsional resistance of the overall connection structure.

[0005] However, the above connection structure still has many shortcomings. Due to the long-term heavy weight load and complex and changeable environmental stresses such as wind load, snow load, thermal expansion and contraction stress caused by temperature changes, etc., over time, and the small size of the second main shaft connection, it is prone to stress concentration due to long-term gravity. The T-bolts will suffer fatigue damage due to long-term tension, which will deteriorate the fastening effect. In addition, the main shaft material will undergo plastic deformation due to the high pressure per unit area of ​​the connection part. The material deformation and loosening of the bolts will cause the connection structure to move and sag under gravity. This sagging deformation will not only cause the installation angle of the photovoltaic module to deviate, thereby significantly reducing the power generation efficiency of the photovoltaic module, but also seriously threaten the structural stability of the entire photovoltaic support system, increase safety risks, and shorten the service life of the photovoltaic equipment. Utility Model Content

[0006] The main technical problem to be solved by the utility model is to provide a sag corrector for the connection of the photovoltaic main shaft, which has a simple structure, is easy to operate, has a low manufacturing cost, can effectively correct the sag deformation of the photovoltaic main shaft, ensure the normal operation and structural stability of the photovoltaic equipment, improve the power generation efficiency and extend the service life.

[0007] In order to solve the above technical problems, the present invention provides a technical solution as follows:

[0008] A sag corrector for a photovoltaic main shaft connection comprises a clamp body and a correction piece, wherein an installation area for the photovoltaic main shaft is formed between the clamp body and the correction piece, and the correction piece consists of a first horizontal support piece and two identical second horizontal support pieces, wherein the two second horizontal support pieces are respectively vertically fixed at the centers of the two side walls of the first horizontal support piece, and the first horizontal support piece and the two second horizontal support pieces form a cross-shaped structure, wherein two supporting protrusions are symmetrically connected to the bottom of the first horizontal support piece near its two ends, and the two supporting protrusions are respectively arranged on both sides of two adjacent photovoltaic connections, and mounting holes are respectively provided on the top of the second horizontal support piece, and the two ends of the clamp body respectively pass through the corresponding mounting holes and are threadedly connected with anti-loosening nuts.

[0009] The following is a further optimization of the above technical solution by the present invention:

[0010] A U-shaped groove with an opening facing downward is provided in each of the first horizontal supporting member and the second horizontal supporting member.

[0011] Further optimization: an avoidance portion is formed between the two supporting protrusions, and the avoidance portion is in a groove shape.

[0012] Further optimization: the length of the avoidance portion is greater than the length of the connection between two adjacent photovoltaic main axes.

[0013] Further optimization: the corners of the first horizontal support member are arc transition structures, and the edges of the first horizontal support member are chamfered.

[0014] Further optimization: the corners of the second horizontal support member are arc transition structures, and the edges of the second horizontal support member are chamfered.

[0015] Further optimization: the clamp body is formed by bending a single steel pipe multiple times, and the bending part is an arc transition structure.

[0016] Further optimization: a section of the bottom end of the clamp body supporting the photovoltaic main axis matches the shape of the photovoltaic main axis, and the shape of the section of the bottom end of the clamp body supporting the photovoltaic main axis is determined by the shape of the photovoltaic main axis.

[0017] Further optimization: a threaded structure is provided at the upper end of the clamp body, and the threaded structure passes through the mounting hole on the second horizontal support member and is threadedly connected to the anti-loosening nut.

[0018] Further optimization: a gasket is provided between the mounting hole on the second horizontal support member and the anti-loosening nut, and the diameter of the gasket is larger than the diameter of the mounting hole.

[0019] By adopting the above technical solution, the utility model has a simple structure, convenient operation, low manufacturing cost, can effectively correct the sagging deformation of the photovoltaic main shaft, ensure the normal operation and structural stability of the photovoltaic equipment, improve the power generation efficiency and extend the service life.

[0020] The utility model is provided by coordinating the clamp body and the correction piece, and the cross-shaped structure of the correction piece can provide good supporting force in all directions, can remain stable when responding to different external forces, prevent itself from deformation and displacement, and ensure the reliability of the correction function. The cross-shaped structure of the correction piece has multi-directional correction capabilities, which can comprehensively and effectively correct the sagging problem.

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 A schematic diagram of the overall structure of an embodiment of the present utility model;

[0024] Figure 2 This is a front view of an embodiment of the utility model;

[0025] Figure 3 A side view of an embodiment of the present utility model;

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure in the use state of the embodiment of the utility model.

[0027] In the figure: 1-clamp body; 2-correction member; 21-first horizontal support member; 22-second horizontal support member; 23-locking nut; 24-support protrusion; 25-avoidance portion; 3-installation area; 4-gasket. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] like Figure 1-4 As shown, a sag corrector for a photovoltaic main shaft connection comprises a clamp body 1 and a correction piece 2, wherein an installation area 3 of the photovoltaic main shaft is formed between the clamp body 1 and the correction piece 2, and the correction piece 2 is composed of a first horizontal support member 21 and two identical second horizontal support members 22, wherein the two second horizontal support members 22 are respectively vertically fixed at the centers of the two side walls of the first horizontal support member 21, and the first horizontal support member 21 and the two second horizontal support members 22 form a cross structure, and two supporting protrusions 24 are symmetrically connected to the bottom of the first horizontal support member 21 near its two ends, and the two supporting protrusions 24 are respectively arranged on both sides of two adjacent photovoltaic connections, and mounting holes are opened on the top of the second horizontal support member 22, and the two ends of the clamp body 1 pass through the corresponding mounting holes and are threadedly connected with anti-loosening nuts 23.

[0030] With this design, firstly, the cross-shaped structure of the correction member 2 can provide good supporting force in all directions, remain stable when responding to different external forces, prevent itself from deformation and displacement, and ensure the reliability of the correction function.

[0031] Secondly, the two supporting protrusions 24 at the bottom of the first horizontal support member 21 increase the supporting points of the connection part, disperse the pressure, improve the stability of the connection with the photovoltaic main axis, and enhance the ability to resist external forces.

[0032] Thirdly, the second horizontal support member 22 is provided with a mounting hole to facilitate the installation of the clamp body 1, which is easy to operate and improves the installation efficiency. Moreover, each component can be naturally and accurately positioned, reducing the trouble of position adjustment.

[0033] In addition, the cross-shaped structure has multi-directional correction capabilities, which can comprehensively and effectively correct the sagging problem. The threaded connection of the anti-loosening nut 23 mounting hole can be finely adjusted to achieve accurate correction.

[0034] Finally, the first horizontal support member 21 and the support protrusion 24 are integrally connected to enhance the structural strength and durability, and the overall structure is convenient for maintenance and inspection, which is conducive to timely discovery and handling of problems and ensures continuous and reliable operation.

[0035] A U-shaped groove with the opening facing downward is formed in each of the first horizontal support member 21 and the second horizontal support member 22 .

[0036] This design can first remove some materials to reduce the weight of the corrector, reduce the additional load on related structures such as the photovoltaic main axis, and help maintain the structural stability of the photovoltaic system.

[0037] Secondly, the water that enters can be discharged through the slot to avoid rust and corrosion of components caused by water accumulation, thereby extending the service life of the corrector and reducing maintenance and replacement costs.

[0038] Thirdly, it can accommodate differences in spindle size and shape, improving correction accuracy and effect.

[0039] An escape portion 25 is formed between the two supporting protrusions 24 , and the escape portion 25 is in a groove shape.

[0040] This design, first of all, can avoid the auxiliary structures on the main shaft, so that the corrector and the main shaft are more closely connected, avoiding interference and ensuring accurate installation to play a correction role.

[0041] Secondly, it can adapt to the differences between spindles of different specifications, provide accommodation space for special parts, and enhance the versatility of the corrector.

[0042] The length of the avoidance portion 25 is greater than the length of the connection between two adjacent photovoltaic main shafts.

[0043] This design can maintain the stable state of the connection between the corrector and the main shaft when subjected to external forces for a long time, avoid situations such as squeezing and collision caused by insufficient space that affect the stability of the connection, extend the service life of the corrector, and facilitate subsequent maintenance personnel to fully inspect and contact the connection parts, so as to facilitate the timely discovery and resolution of potential problems and ensure the stable operation of the photovoltaic system.

[0044] The corners of the first horizontal support member 21 are arc transition structures, and the edges of the first horizontal support member 21 are chamfered.

[0045] This design, first of all, when the corrector is subjected to external loads, effectively avoids stress mutation and concentration at the corners, makes the stress transition smoothly, reduces the stress impact caused by external loads, and improves the load-bearing capacity of the corrector.

[0046] Secondly, when the corrector is under load, the right-angled edges are prone to cause stress concentration and peaks. The rounded corners can allow the stress to transition evenly along the corners, avoiding sudden changes and concentration, thereby reducing the risk of fatigue damage caused by long-term repeated loading, and thus ensuring that the corrector continues to work stably when subjected to dynamic loads such as wind and vibration.

[0047] The corners of the second horizontal support member 22 are arc transition structures, and the edges of the second horizontal support member 22 are chamfered.

[0048] This design, first of all, when the corrector is subjected to external loads, effectively avoids stress mutation and concentration at the corners, makes the stress transition smoothly, reduces the stress impact caused by external loads, and improves the load-bearing capacity of the corrector.

[0049] Secondly, when the corrector is under load, the right-angled edges are prone to cause stress concentration and peaks. The rounded corners can allow the stress to transition evenly along the corners, avoiding sudden changes and concentration, thereby reducing the risk of fatigue damage caused by long-term repeated loading, and thus ensuring that the corrector continues to work stably when subjected to dynamic loads such as wind and vibration.

[0050] In this embodiment, the groove of the avoidance portion 25 is rectangular in shape and extends along the length direction of the first horizontal support member 21 .

[0051] With this design, the avoidance portion 25 extends along the length direction of the first horizontal support member 21. When it is subjected to vertical loads (such as the downward pressure of the photovoltaic main shaft, wind force, etc.), the stress is evenly transmitted along the avoidance portion 25 and the surrounding area by changing the material distribution, thereby effectively avoiding stress concentration, reducing the risk of local material yield or fracture, and improving the structural strength and stability of the first horizontal support member 21, thereby improving the overall structural strength and stability of the corrector; and it can enhance the bending resistance and reduce the deflection of the first horizontal support member 21 when it is subjected to lateral loads.

[0052] The avoidance portion 25 is located in the middle of the first horizontal support member 21 in the longitudinal direction.

[0053] With this design, first, the avoidance portion 25 is located in the middle in the length direction, so that the stress under the vertical load is evenly distributed in the middle of the first horizontal support member 21 and transmitted symmetrically to both sides, avoiding stress concentration at one end. The entire support member structure can be fully utilized to withstand the vertical force, just like a reasonably designed shoulder pole with reduced weight in the middle can better carry heavy objects and improve the carrying capacity.

[0054] The corners of the avoidance portion 25 are arc transition structures, and the edges of the avoidance portion 25 are chamfered.

[0055] This design, first of all, when the corrector is subjected to external loads, effectively avoids stress mutation and concentration at the corners, makes the stress transition smoothly, reduces the stress impact caused by external loads, and improves the load-bearing capacity of the corrector.

[0056] Secondly, when the corrector is loaded, the right-angled edge easily causes stress concentration to produce peaks. The rounded corners can allow the stress to transition evenly along the rounded corners, avoiding sudden changes and concentration, thereby reducing the risk of fatigue damage caused by long-term repeated loading. Furthermore, when subjected to dynamic loads such as wind and vibration, the rounded edge of the avoidance portion 25 can extend the fatigue life of the structure and ensure the continuous and stable operation of the corrector.

[0057] In this embodiment, the length of the avoidance portion 25 is 2 / 3 to 3 / 4 of the length of the first horizontal support member 21 , and the height of the avoidance portion 25 is 1 / 4 to 1 / 3 of the height of the first horizontal support member 21 .

[0058] In this embodiment, the first horizontal support member 21 and the second horizontal support member 22 are made of Q345B low-alloy high-strength structural steel.

[0059] In this embodiment, the surfaces of the first horizontal support member 21 and the second horizontal support member 22 are hot-dip galvanized.

[0060] The clamp body 1 is formed by bending a single steel pipe multiple times, and the bending parts are arc transition structures.

[0061] With this design, stress will be distributed within the structure when subjected to external forces. The arc transition allows the stress to be smoothly distributed along the curve, avoiding stress concentration and reducing weak points. It can also improve the fatigue resistance of the clamp when subjected to external forces such as wind, snow, and tightening force for a long time, allowing it to work stably for a long time in a complex stress environment.

[0062] The section of the photovoltaic main axis supported by the bottom end of the clamp body 1 matches the shape of the photovoltaic main axis, and the shape of the section of the photovoltaic main axis supported by the bottom end of the clamp body 1 is determined by the shape of the photovoltaic main axis.

[0063] This design, firstly, makes the clamp body 1 in close contact with the photovoltaic main shaft, increases the contact area between the clamp body 1 and the photovoltaic main shaft, and effectively prevents the clamp body 1 from sliding sideways on the photovoltaic main shaft.

[0064] Secondly, since the bottom end of the clamp body 1 supports a section of the photovoltaic main shaft and is adapted to the shape of the photovoltaic main shaft, the clamp body 1 supports a section of the photovoltaic main shaft through the bottom end and the force applied to the photovoltaic main shaft can be evenly distributed on the surface of the photovoltaic main shaft. This fitting method can better adapt to the shape of the photovoltaic main shaft and avoid damage to the surface of the photovoltaic main shaft caused by excessive local pressure.

[0065] In this embodiment, the photovoltaic main shaft is an octagonal tube, and the section at the bottom end of the clamp body 1 that supports the photovoltaic main shaft is trapezoidal.

[0066] In addition to this embodiment, when the photovoltaic main shaft is a round tube, the section of the bottom end of the clamp body 1 that supports the photovoltaic main shaft is arc-shaped, and the photovoltaic main shaft can also be a square tube, hexagonal tube or other special-shaped tube.

[0067] A threaded structure is provided at the upper end of the clamp body 1 , and the threaded structure passes through the mounting hole on the second horizontal support member 22 and is threadedly connected to the anti-loosening nut 23 .

[0068] With this design, first, the operator only needs to pass the threaded end of the clamp body 1 through the mounting hole, and then use the anti-loosening nut 23 to tighten it. Therefore, when it is necessary to disassemble for maintenance or replace parts, the anti-loosening nut 23 can be easily unscrewed and the clamp body 1 can be removed. This connection method does not require complicated tools and special installation processes, is easy to operate, and can effectively improve the efficiency of installation and maintenance.

[0069] Secondly, the threaded connection can generate large friction and axial tension. By tightening the locknut 23, the clamp body 1 can be tightly fixed to the second horizontal support member 22. This reliable fastening force can ensure that the clamp body 1 will not loosen due to vibration of the photovoltaic main shaft, wind load or other external forces during long-term use, thereby ensuring the stability and reliability of the entire sag corrector.

[0070] Again, during the installation process, the pre-tightening force of the clamp body 1 on the photovoltaic main shaft can be accurately adjusted by controlling the tightening degree of the anti-loosening nut 23, so that tools such as a torque wrench can be used to accurately apply the pre-tightening force to correct the sagging of the connection parts of two adjacent photovoltaic main shafts.

[0071] In this embodiment, the clamp body 1 is made of Q235B carbon structural steel.

[0072] In this embodiment, the surface of the clamp body 1 is hot-dip galvanized.

[0073] A gasket 4 is provided between the mounting hole on the second horizontal support member 22 and the lock nut, and the diameter of the gasket 4 is larger than the diameter of the mounting hole.

[0074] With this design, first, the diameter of the gasket 4 is larger than the diameter of the mounting hole, so that when the anti-loosening nut 23 is tightened, the pressure of the anti-loosening nut 23 on the second horizontal support member 22 can be evenly dispersed to a larger area around the mounting hole through the gasket 4, avoiding problems such as deformation of the material at the edge of the hole and extending the life of the component.

[0075] Secondly, the gasket 4 can increase the friction between the anti-loosening nut 23 and the second horizontal support member 22, which helps prevent the anti-loosening nut 23 from loosening due to vibration and other reasons during long-term use; at the same time, the gasket 4 can also play a buffering role, reducing the direct friction between the anti-loosening nut 23 and the mounting hole, reducing the wear of the nut and the mounting hole, and further improving the reliability and stability of the connection.

[0076] When in use, first place the first horizontal support member 21 on top of two adjacent photovoltaic main shaft connection parts, and place both ends of the first horizontal support member 21 on both sides of the two adjacent photovoltaic main shaft connection parts.

[0077] Then, the clamp body 1 is moved to fit the special-shaped area of ​​the clamp body 1 with the photovoltaic main axis, and at the same time, the two ends of the clamp body 1 are respectively passed through the corresponding mounting holes on the second horizontal support member 22.

[0078] Then, the anti-loosening nut 23 is preliminarily tightened to the clamp body 1, but not completely tightened, so that the clamp body 1 has a certain pre-tightening force on the photovoltaic main shaft.

[0079] Then, the position of the first horizontal support member 21 is finely adjusted so that the two ends of the first horizontal support member 21 are symmetrically arranged on both sides of the adjacent main shaft connection portion.

[0080] Finally, the anti-loosening nut 23 is tightened again so that the clamp body 1 applies an upward corrective force to the main shaft, so that the two adjacent main shafts will not sag.

[0081] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sag corrector for a photovoltaic main shaft connection, characterized by: The invention comprises a clamp body (1) and a correction piece (2), wherein a photovoltaic main axis installation area (3) is formed between the clamp body (1) and the correction piece (2), and the correction piece (2) is composed of a first horizontal support piece (21) and two identical second horizontal support pieces (22), and the two second horizontal support pieces (22) are respectively fixed vertically at the centers of the two side walls of the first horizontal support piece (21), and the first horizontal support piece (21) and the two second horizontal support pieces (22) form a cross-shaped structure, and two supporting protrusions (24) are symmetrically connected to the bottom of the first horizontal support piece (21) near its two ends, and the two supporting protrusions (24) are respectively arranged on both sides of two adjacent photovoltaic connection points, and the top of the second horizontal support piece (22) is provided with an installation hole, and the two ends of the clamp body (1) pass through the corresponding installation holes and are threadedly connected with anti-loosening nuts (23).

2. The sag corrector for photovoltaic main shaft connection according to claim 1, characterized in that: The first horizontal support member (21) and the second horizontal support member (22) are both provided with a U-shaped groove with an opening facing downward.

3. The sag corrector for photovoltaic main shaft connection according to claim 2, characterized in that: An avoidance portion (25) is formed between the two supporting protrusions (24), and the avoidance portion (25) is in a groove shape.

4. The sag corrector for photovoltaic main shaft connection according to claim 3, characterized in that: The length of the avoidance portion (25) is greater than the length of the connection between two adjacent photovoltaic main shafts.

5. The sag corrector for photovoltaic main shaft connection according to claim 1, characterized in that: The corners of the first horizontal support member (21) are arc transition structures, and the edges of the first horizontal support member (21) are chamfered.

6. The sag corrector for photovoltaic main shaft connection according to claim 1, characterized in that: The corners of the second horizontal support member (22) are arc transition structures, and the edges of the second horizontal support member (22) are chamfered.

7. The sag corrector for photovoltaic main shaft connection according to claim 1, characterized in that: The hoop body (1) is formed by bending a single steel pipe multiple times, and the bending parts are arc transition structures.

8. The sag corrector for photovoltaic main shaft connection according to claim 7, characterized in that: A section of the photovoltaic main shaft supported at the bottom end of the hoop main body (1) matches the shape of the photovoltaic main shaft, and the shape of the section of the photovoltaic main shaft supported at the bottom end of the hoop main body (1) is determined by the shape of the photovoltaic main shaft.

9. The sag corrector for photovoltaic main shaft connection according to claim 8, characterized in that: A threaded structure is provided at the upper end of the clamp body (1), and the threaded structure passes through the mounting hole on the second horizontal support member (22) and is threadedly connected to the anti-loosening nut (23).

10. The sag corrector for photovoltaic main shaft connection according to claim 1, characterized in that: A washer (4) is provided between the mounting hole on the second horizontal support member (22) and the anti-loosening nut (23), and the diameter of the washer (4) is larger than the diameter of the mounting hole.

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