A connecting structure of a photovoltaic support and a prestressed concrete pipe pile

Abstract

This utility model relates to the field of connection structure technology, providing a connection structure between a photovoltaic support and a prestressed concrete pipe pile. It includes a pre-positioning conical insert, into which a pre-positioning conical rod is inserted. A first piston cylinder is fixed to the bottom wall of the pre-positioning conical insert, and a driving cavity is formed within the pre-positioning conical rod. This utility model allows the outer conical surface of the pre-positioning conical rod to slide into the inner conical surface of the pre-positioning conical insert. Relying on the self-guiding characteristics of the conical surface, it automatically corrects planar position deviations, achieving rapid pre-positioning. As the pre-positioning conical rod continues to descend into position, the top wall of the driving cavity pushes the first piston rod into the first piston cylinder, compressing it. The sealed hydraulic oil inside the cylinder is simultaneously transported via a guide pipe to the second piston cylinder of the circumferential positioning and clamping mechanism, converting the axial linear displacement of the insert into hydraulic driving force, automatically triggering the circumferential clamping action, completing the circumferential positioning and clamping function, and improving stability.

Description

Technical Field

[0001] This utility model relates to the field of connection structure technology, and in particular to a connection structure between a photovoltaic support and a prestressed concrete pipe pile. Background Technology

[0002] Photovoltaic support structures are the load-bearing framework of photovoltaic power stations, and are structural components specifically used to fix and support photovoltaic modules. Prestressed concrete pipe piles, also known as PHC pipe piles, are a type of factory-prefabricated hollow concrete foundation piles, which serve as the underground foundation of ground-mounted photovoltaic power stations. The two need to be connected by a connection structure to integrate the upper support framework and the lower foundation piles into a whole. This connection structure is the connection node between the bottom of the photovoltaic support column and the top of the pipe pile. For example, patent CN219343289U discloses a photovoltaic bracket insert-type foundation connection node, including a PHC pipe pile and a steel pipe, anchor bars, and spiral stirrups arranged sequentially from the inside to the outside of the PHC pipe pile. The bottom of the anchor bars is provided with a steel support plate, and the PHC pipe pile is filled with concrete; one end of the steel pipe is located outside the PHC pipe pile. This photovoltaic bracket insert-type foundation connection node, through welding the steel pipe and anchor bars to form a whole, and then using the spiral stirrups to continuously constrain the concrete, significantly improves the load-bearing capacity, damage resistance, and seismic performance of the component. Its structure is robust and has strong wind resistance. During installation, the depth of the steel pipe inserted into the PHC pipe pile can be controlled, and then concrete is poured in for fixation to achieve the purpose of adjusting the height above the ground. While the aforementioned photovoltaic support insert-type foundation connection node can be used to weld steel pipes and anchor bars to form a whole with the anchor bars and steel support plates, and then use spiral stirrups to continuously constrain the concrete, significantly improving the load-bearing capacity, damage resistance, and seismic performance of the component, its structure is robust and has strong wind resistance. During installation, the depth of the steel pipe inserted into the PHC pipe pile can be controlled before pouring concrete for fixation to adjust the height above the ground. However, it adopts a straight-walled steel pipe direct insertion structure, and the insertion process relies entirely on manual hoisting and alignment, which is prone to radial eccentricity. Furthermore, it cannot simultaneously achieve circumferential fixation during pre-positioning, resulting in weak wind vibration fatigue performance. Therefore, it is necessary to design a connection structure between the photovoltaic support and the prestressed concrete pipe pile to solve the problems of inconvenient centering and positioning, lack of active circumferential mechanical clamping, and weak wind vibration stability of the existing connection structure. Utility Model Content

[0003] The purpose of this utility model is to provide a connection structure between a photovoltaic support and a prestressed concrete pipe pile, in order to solve the defects of the existing connection structure between the photovoltaic support and the prestressed concrete pipe pile, which has weak wind vibration resistance due to inconvenient centering and positioning and lack of active circumferential mechanical clamping.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a connection structure between a photovoltaic support and a prestressed concrete pipe pile, including a prepositioned conical insert; A prepositioning conical insert is inserted into the prepositioning conical insert, a first piston cylinder is fixedly provided on the bottom wall of the prepositioning conical insert, a driving cavity is provided in the prepositioning conical insert, and a first piston rod is provided at the output end of the first piston cylinder and fixedly connected to the top wall of the driving cavity. A circumferential positioning and clamping mechanism is installed on the prepositioning conical insert. The circumferential positioning and clamping mechanism includes a fixed plate coaxially sleeved on the prepositioning conical insert. A drive plate is movably connected to the top of the fixed plate through a bearing. A second piston cylinder is movably connected to the outer wall of the fixed plate. A guide tube is connected between the first piston cylinder and the second piston cylinder. A second piston rod is movably connected to the drive plate at the output end of the second piston cylinder. The drive disc has an arc-shaped guide groove circumferentially, and a slider is slidably fitted inside the arc-shaped guide groove. An adjusting clamping arm is movably connected to the slider through a linkage rod.

[0005] Furthermore, the adjustable clamping arm is provided with four arms, and the top of the adjustable clamping arm is fitted with an adjustable support arm by screws. The four adjustable support arms are distributed sequentially on the front, back, left and right sides of the prepositioned conical insert.

[0006] Furthermore, the top end of the adjusting arm is provided with an elastic telescopic rod, and a spring is connected inside the elastic telescopic rod.

[0007] Furthermore, the output end of the elastic telescopic rod is provided with a spherical compression block, and the outer wall of the spherical compression block is vulcanized with an anti-slip rubber layer.

[0008] Furthermore, the prepositioning tapered insert is uniformly provided with axial fixing bolts that connect to the prepositioning tapered insert.

[0009] Furthermore, both the axial fixing bolt and the pre-positioning conical insert are fixed with annular engagement discs.

[0010] Furthermore, there are two axial fixing bolts and four annular engagement discs, with oblique grooves and oblique protrusions evenly arranged between adjacent annular engagement discs.

[0011] Furthermore, a limiting sleeve is fixedly provided at the bottom of the adjusting clamp arm, and a limiting slide rod that slides in cooperation with the limiting sleeve is fixedly connected to the outer wall of the fixed plate.

[0012] The connection structure between the photovoltaic support and the prestressed concrete pipe pile provided by this utility model has the following advantages: With the installation of a circumferential positioning and clamping mechanism, a pre-positioning conical insert is pre-welded and fixed to the bottom of the photovoltaic support column, and a pre-positioning conical insert is pre-embedded and solidified in the inner cavity of the prestressed concrete pipe pile top. When the photovoltaic support column is inserted downwards, the outer conical surface of the pre-positioning conical insert slides along the inner conical surface of the pre-positioning conical insert. Relying on the self-guiding characteristics of the conical surface, the planar position deviation is automatically corrected to complete the rapid pre-positioning. During the continuous downward movement of the pre-positioning conical insert, the top wall of the drive cavity pushes the first piston rod into the first piston cylinder, compressing it. The sealed hydraulic oil in the cylinder is synchronously transported to the second piston cylinder of the circumferential positioning and clamping mechanism through the guide pipe, converting the axial linear displacement of the insertion into hydraulic driving force, automatically triggering the circumferential clamping action. Furthermore, after the hydraulic oil enters the second piston cylinder through the guide pipe, it pushes the second piston rod to extend axially, driving the drive disc to rotate around the fixed disc. When the central axis rotates circumferentially, the drive disk rotates, and the side wall of the arc-shaped guide groove opened circumferentially pushes the slider to slide along the groove trajectory. Then, through the linkage rod, it pulls the adjusting clamp arm to retract towards the central axis. The limiting slide rod fixed to the outer wall of the fixed disk slides and engages with the limiting slide sleeve at the bottom of the adjusting clamp arm, constraining the adjusting clamp arm to only move in a straight line in the radial direction. Finally, the four sets of adjusting clamp arms retract synchronously towards the center, hug the pre-positioning tapered insert rod inside, and complete the circumferential positioning and clamping function. Furthermore, the adjusting support arm is detachably snapped onto the top of the adjusting clamp arm by screws. There are four sets in total, which are distributed in sequence on the front, back, left and right sides of the pre-positioning tapered insert rod. Different lengths of adjusting support arms can be replaced according to the cross-sectional size and cross-sectional shape of the photovoltaic bracket foot. The adjusting clamp arms on the front and back sides and the left and right sides can be installed with different lengths of adjusting support arms, which are suitable for bracket feet with non-circular cross sections such as rectangles. By incorporating elastic telescopic rods, during the clamping process, the spherical clamping block first contacts the outer wall of the support leg. The spring inside the elastic telescopic rod is compressed, providing elastic clamping force. The spherical structure adaptively conforms to the support leg surfaces with varying flatness. The four clamping points are symmetrically distributed along the front-back and left-right orthogonal directions, forming a complete two-way radial constraint along the XY axes. When the photovoltaic support is subjected to horizontal wind loads, seismic forces, or torsional moments in any direction, the corresponding clamping points can directly bear the shear force, preventing slippage or torsional displacement due to insufficient unidirectional constraint. Furthermore, the elastic buffering effect of the springs can absorb the impact energy generated by wind vibration, weakening the vibration... The dynamic fatigue damage to the connection node is reduced, improving the stability of the connection structure. Furthermore, after circumferential clamping is completed, the two sets of axial fixing bolts arranged on the prepositioning tapered insert are tightened, so that the prepositioning tapered insert and the prepositioning tapered insert form an axial locking constraint. Furthermore, by fixing the mating end faces of the axial fixing bolts and the prepositioning tapered insert, during the locking process, the two sets of adjacent mating annular interlocking discs squeeze each other, and the oblique protrusions evenly arranged on the end faces are embedded in the corresponding oblique grooves, forming a concave-convex interlocking mechanical locking structure, avoiding the common situation of circumferential rotation and loosening of bolts after being subjected to wind vibration, thus improving the reliability of the connection. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model; Figure 2 This is a three-dimensional structural diagram of the circumferential positioning and clamping mechanism of this utility model in its unfolded state; Figure 3 This is a three-dimensional structural diagram of the prepositioning conical insert of this utility model. Figure 4 This is a three-dimensional structural diagram of the spherical compression block of this utility model; Figure 5 This is a three-dimensional structural diagram of the axial fixing bolt of this utility model.

[0014] The reference numerals in the figure are as follows: 1. Pre-positioning conical insert; 2. Pre-positioning conical insert; 3. Axial fixing bolt; 4. Circumferential positioning clamping mechanism; 401. Drive disc; 402. Limiting slide rod; 403. Second piston cylinder; 404. Limiting slide sleeve; 405. Adjusting clamping arm; 406. Linkage rod; 407. Arc-shaped guide groove; 408. Slider; 409. Second piston rod; 410. Fixed disc; 5. Adjusting support arm; 6. Spherical pressing block; 7. First piston cylinder; 8. First piston rod; 9. Drive cavity; 10. Guide tube; 11. Elastic telescopic rod; 12. Spring; 13. Angled protrusion; 14. Annular engagement disc; 15. Angled groove. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1-5 The present invention provides a connection structure between a photovoltaic support and a prestressed concrete pipe pile, including a prepositioned conical insert 2.

[0017] Reference Figures 1-3 A prepositioning conical insert 1 is inserted into the prepositioning conical insert 2. A first piston cylinder 7 is fixedly provided on the bottom wall of the prepositioning conical insert 2. A driving cavity 9 is opened in the prepositioning conical insert 1. A first piston rod 8 is fixedly connected to the top wall of the driving cavity 9 at the output end of the first piston cylinder 7. A circumferential positioning clamping mechanism 4 is installed on the prepositioning conical insert 2. The circumferential positioning clamping mechanism 4 includes a fixed disk 410 coaxially sleeved on the prepositioning conical insert 2. The top of the fixed disk 410 is movably connected to a drive disk 401 through a bearing. A second piston cylinder 403 is movably connected to the outer wall of the fixed disk 410. A guide tube 10 is connected between the first piston cylinder 7 and the second piston cylinder 403. The output end of the second piston cylinder 403 is provided with a second piston rod 409 movably connected to the drive disk 401. The drive disk 401 has an arc-shaped guide groove 407 circumferentially provided, and a slider 408 is slidably fitted in the arc-shaped guide groove 407. An adjusting clamp arm 405 is movably connected to the slider 408 through a connecting rod 406.

[0018] In use, the pre-positioning conical insert 1 is pre-welded and fixed to the bottom of the photovoltaic support column, and the pre-positioning conical insert 2 is pre-embedded and solidified in the inner cavity of the prestressed concrete pipe pile top. When the photovoltaic support column is inserted downwards, the outer conical surface of the pre-positioning conical insert 1 slides into the inner conical surface of the pre-positioning conical insert 2. Relying on the self-guiding characteristics of the conical surface, the planar position deviation is automatically corrected to complete the rapid pre-positioning. During the continuous downward movement of the pre-positioning conical insert 1 into the final position, the top wall of the drive cavity 9 pushes the first piston rod 8 into the first piston cylinder 7 for compression. The sealed hydraulic oil in the cylinder is synchronously transported to the second piston cylinder 403 of the circumferential positioning and clamping mechanism 4 through the guide pipe 10, which converts the axial linear displacement of the insertion into hydraulic driving force and automatically triggers the circumferential clamping action.

[0019] In use, hydraulic oil enters the second piston cylinder 403 through the guide pipe 10, pushing the second piston rod 409 to extend axially, causing the drive disc 401 to rotate circumferentially around the central axis of the fixed disc 410. When the drive disc 401 rotates, the side wall of the arc-shaped guide groove 407 opened circumferentially pushes the slider 408 to slide along the groove trajectory, and then pulls the adjusting clamp arm 405 to retract towards the central axis through the connecting rod 406. The limiting slide rod 402 fixed to the outer wall of the fixed disc 410 slides and engages with the limiting slide sleeve 404 at the bottom of the adjusting clamp arm 405, constraining the adjusting clamp arm 405 to only move in a straight line in the radial direction. Finally, the four sets of adjusting clamp arms 405 retract synchronously towards the center, hugging the pre-positioning conical insert 1 inside, and completing the circumferential positioning and clamping function.

[0020] Reference Figure 1 , Figure 4 and Figure 5 There are four adjusting clamps 405, and the top of the adjusting clamps 405 is fitted with adjusting support arms 5 by screws. The four adjusting support arms 5 are distributed in sequence on the front, back, left and right sides of the prepositioned tapered rod 1. The top of the adjusting arm 5 is provided with an elastic telescopic rod 11, and a spring 12 is connected inside the elastic telescopic rod 11. The output end of the elastic telescopic rod 11 is provided with a spherical pressing block 6, and the outer wall of the spherical pressing block 6 is vulcanized with an anti-slip rubber layer. Axial fixing bolts 3, which are connected to the prepositioning tapered insert 2, are evenly arranged on the prepositioning tapered insert 1. Both the axial fixing bolt 3 and the prepositioning tapered insert 2 are fixed with an annular engagement disc 14; Two axial fixing bolts 3 are provided, and four annular engagement discs 14 are provided. Angled grooves 15 and angled protrusions 13 are evenly provided between adjacent annular engagement discs 14. The bottom of the adjusting clamp arm 405 is fixedly provided with a limiting slide sleeve 404, and the outer wall of the fixed plate 410 is fixedly connected with a limiting slide rod 402 that slides and engages with the limiting slide sleeve 404.

[0021] In use, the adjusting arm 5 is detachably snapped onto the top of the adjusting clamp arm 405 by screws. There are four sets in total, which are distributed in sequence on the front, back, left and right sides of the pre-positioned tapered plug 1. The adjusting arm 5 of different lengths can be replaced according to the cross-sectional size and cross-sectional shape of the photovoltaic bracket foot. The adjusting clamp arm 405 on the front and back sides and the left and right sides can be equipped with adjusting arms 5 of different lengths respectively, which can be adapted to bracket feet with non-circular cross-sections such as rectangles.

[0022] During use, the spherical clamping block 6 first contacts the outer wall of the support leg during clamping. The spring 12 inside the elastic telescopic rod 11 is compressed to provide elastic clamping force. Through the spherical structure, it adaptively fits the support leg surface with different flatness. The four clamping points are symmetrically distributed along the front-back and left-right orthogonal directions, forming a complete two-way radial constraint effect along the XY axis. When the photovoltaic support is subjected to horizontal wind load, seismic action or torsional moment in any direction, the clamping point in the corresponding direction can directly bear the shear force. It will not slip or torsional offset due to insufficient unidirectional constraint. Moreover, the elastic buffering effect of the spring 12 can absorb the impact energy generated by wind vibration, weaken the fatigue damage of vibration to the connection node, and improve the stability of the connection structure.

[0023] In use, after circumferential clamping is completed, the two sets of axial fixing bolts 3 arranged on the prepositioning tapered insert 1 are tightened to form an axial locking constraint between the prepositioning tapered insert 1 and the prepositioning tapered insert 2. Furthermore, by fixing the mating end faces of the axial fixing bolts 3 and the prepositioning tapered insert 2, during the locking process, the two sets of adjacent mating annular interlocking discs 14 squeeze each other, and the oblique protrusions 13 evenly arranged on the end faces are embedded in the corresponding oblique grooves 15 to form a mechanical locking structure of concave and convex interlocking, which avoids the common situation of circumferential rotation and loosening of bolts after being subjected to wind vibration, and improves the reliability of the connection.

[0024] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A connection structure between a photovoltaic support and a prestressed concrete pipe pile, comprising a prepositioned conical insert (2); Its features are: The prepositioning conical insert (2) is inserted with a prepositioning conical insert rod (1), and a first piston cylinder (7) is fixedly provided on the bottom wall of the prepositioning conical insert (2). A driving cavity (9) is opened in the prepositioning conical insert rod (1), and a first piston rod (8) is fixedly connected to the top wall of the driving cavity (9) at the output end of the first piston cylinder (7). A circumferential positioning clamping mechanism (4) is installed on the prepositioning conical insert (2). The circumferential positioning clamping mechanism (4) includes a fixed disk (410) coaxially sleeved on the prepositioning conical insert (2). The top of the fixed disk (410) is movably connected to a drive disk (401) through a bearing. A second piston cylinder (403) is movably connected to the outer wall of the fixed disk (410). A guide pipe (10) is connected between the first piston cylinder (7) and the second piston cylinder (403). The output end of the second piston cylinder (403) is provided with a second piston rod (409) movably connected to the drive disk (401). The drive disk (401) is provided with an arc-shaped guide groove (407) in the circumference. A slider (408) is slidably fitted in the arc-shaped guide groove (407). An adjusting clamp arm (405) is movably connected to the slider (408) through a connecting rod (406).

2. The connecting structure of the photovoltaic support and the prestressed concrete pipe pile according to claim 1, characterized in that: The adjustable clamping arm (405) is provided with 4, and the top of the adjustable clamping arm (405) is fitted with an adjustable support arm (5) by screws. The 4 adjustable support arms (5) are distributed in sequence on the front, back, left and right sides of the prepositioned conical insert (1).

3. The connecting structure of the photovoltaic support and the prestressed concrete pipe pile according to claim 2, characterized in that: The top of the adjusting arm (5) is provided with an elastic telescopic rod (11), and a spring (12) is connected inside the elastic telescopic rod (11).

4. The connecting structure of photovoltaic support and prestressed concrete pipe pile according to claim 3, characterized in that: The output end of the elastic telescopic rod (11) is provided with a spherical pressure block (6), and the outer wall of the spherical pressure block (6) is vulcanized with an anti-slip rubber layer.

5. The photovoltaic support and pre-stressed concrete pipe pile connection structure according to claim 1, characterized in that: The prepositioning tapered insert (1) is uniformly provided with axial fixing bolts (3) that are connected to the prepositioning tapered insert (2).

6. The connecting structure of photovoltaic support and prestressed concrete pipe pile according to claim 5, characterized in that: Both the axial fixing bolt (3) and the prepositioning conical insert (2) are fixed with an annular engagement disc (14).

7. The connecting structure of photovoltaic support and prestressed concrete pipe pile according to claim 6, characterized in that: Two axial fixing bolts (3) are provided, and four annular engagement discs (14) are provided. An inclined groove (15) and an inclined protrusion (13) are evenly provided between adjacent annular engagement discs (14).

8. The connecting structure of photovoltaic support and pre-stressed concrete pipe pile according to claim 1, characterized in that: The bottom of the adjusting clamp (405) is fixedly provided with a limiting slide sleeve (404), and the outer wall of the fixed plate (410) is fixedly connected with a limiting slide rod (402) that slides in cooperation with the limiting slide sleeve (404).

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