Reversing screw connecting structure for connecting offshore photovoltaic truss and prefabricated pipe pile

Abstract

The invention relates to the technical field of offshore photovoltaic power stations, and discloses a reversing screw connecting structure for connection of an offshore photovoltaic truss and a prefabricated pipe pile, the reversing screw connecting structure comprises a photovoltaic truss body and a prefabricated pipe pile body arranged below the photovoltaic truss body, a photovoltaic truss support is arranged at the bottom of the photovoltaic truss body, and the prefabricated pipe pile body is arranged below the photovoltaic truss body. The photovoltaic truss support is provided with a connecting hole, a reversing screw rod is movably arranged in the connecting hole in a penetrating mode, a locking nut is locked into the top of the reversing screw rod, the reversing screw rod is locked to the photovoltaic truss support through the locking nut, an anchor plate is arranged at the bottom of the reversing screw rod, and a connecting sleeve is arranged at the top of the prefabricated pipe pile body. Two partition plates are arranged in the connecting sleeve, the distance between the two partition plates is longer than the shortest edge of the anchor plate but shorter than the longest edge of the anchor plate, the reversing screw penetrates through the space between the two partition plates, and the top wall of the anchor plate is tightly attached to the bottom walls of the two partition plates; the method has the advantages of being convenient to install, improving the construction efficiency and being high in overall structural strength.

Description

Technical Field

[0001] The invention relates to a reversing screw connection structure for connecting an offshore photovoltaic truss with a prefabricated pipe pile, and belongs to the technical field of offshore photovoltaic power stations. Background Art

[0002] At present, as the country vigorously promotes the construction of new energy power generation, photovoltaic power stations are gradually developing offshore. At present, photovoltaic power stations of varying sizes have been built in major coastal provinces in my country. In the construction of offshore photovoltaic power stations, the use of prefabricated pipe pile foundations is a common form, but the connection and installation of offshore photovoltaic trusses and prefabricated pipe piles is one of the key points and difficulties. At present, the more common connection method is to weld the truss support to the top plate of the pile. However, due to the influence of wind and waves at sea, welding operations are difficult and dangerous.

[0003] To this end, in the prior art, the utility model patent with Chinese patent application number 202321498355.9 discloses a truss-type large-span support suitable for offshore photovoltaic projects, which simplifies the connection and positioning process of the offshore photovoltaic support structure when it is hoisted as a whole or in blocks by setting up a basin-type support structure, which adopts a side plug-in connection between the basin-type support and the leg base. It can avoid the disadvantages of the inconvenience of traditional welding connection in offshore construction, and has the advantages of reducing the difficulty and danger of operation. However, it still has the following problems in actual use: 1. The side-entry bolt connection structure requires bolts to be screwed in from both sides, so it has high space requirements. However, the space for connecting the offshore photovoltaic truss with the prefabricated pipe piles is small. Due to the limited installation space, the operator may need to adjust his position and angle at all times during the connection operation in order to carry out the corresponding installation work, which leads to the problems of troublesome installation and low construction efficiency.

[0004] 2. The side-entry bolt connection structure easily makes the stress distribution on the bolts uneven, and local stress concentration may occur, which will affect the strength and durability of the entire structure. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a reversing screw connection structure for connecting an offshore photovoltaic truss with a prefabricated pipe pile.

[0006] The technical solution of the present invention is as follows: A reversing screw connection structure for connecting an offshore photovoltaic truss with a prefabricated pipe pile comprises a photovoltaic truss body and a prefabricated pipe pile body arranged below the photovoltaic truss body, a photovoltaic truss support is arranged at the bottom of the photovoltaic truss body, a connecting hole is opened on the photovoltaic truss support, a reversing screw is movably inserted in the connecting hole, a locking nut is locked in the top of the reversing screw, and the locking nut locks the reversing screw to the photovoltaic truss support, an anchor plate is arranged at the bottom of the reversing screw, a connecting sleeve is arranged at the top position of the prefabricated pipe pile body, two partitions are arranged inside the connecting sleeve, the spacing between the two partitions is longer than the shortest side of the anchor plate but shorter than the longest side of the anchor plate, the reversing screw passes through between the two partitions, and the top wall of the anchor plate and the bottom walls of the two partitions are both closely arranged.

[0007] Furthermore, the photovoltaic truss support includes a support vertical plate and a support bottom plate, the support vertical plate is fixedly arranged at the bottom of the photovoltaic truss body, the connection hole is opened on the support bottom plate, and the locking nut locks the reversing screw on the support bottom plate.

[0008] Furthermore, a nut pad is arranged between the locking nut and the support base plate, and the reversing screw is movably arranged to pass through the nut pad. When the locking nut locks the reversing screw on the support base plate, the top wall of the nut pad is tightly arranged against the bottom wall of the locking nut, and the bottom wall of the nut pad is tightly arranged against the top wall of the support base plate.

[0009] Furthermore, a round tube shear key is threadedly connected to the reversing screw, the top wall of the round tube shear key is closely arranged to the bottom wall of the support bottom plate, and the round tube shear key enters between the two partitions.

[0010] Furthermore, a sleeve top plate is provided at the top of the connecting sleeve, the diameter of the connecting sleeve is smaller than the inner diameter of the prefabricated pipe pile body, the diameter of the sleeve top plate is larger than the inner diameter of the prefabricated pipe pile body, the connecting sleeve is extended from the top of the prefabricated pipe pile body into the prefabricated pipe pile body, and the bottom wall of the sleeve top plate is fixedly connected to the top of the prefabricated pipe pile body.

[0011] Furthermore, a square hole is provided on the top plate of the sleeve, the square hole is connected to the space between the two partitions in the connecting sleeve, the shortest side of the square hole is longer than the shortest side of the anchor plate, and the round tube shear key is movably arranged to pass through the square hole.

[0012] Furthermore, an end plate is provided on the top of the prefabricated pipe pile body, and the bottom wall of the sleeve top plate is welded to the top wall of the end plate.

[0013] Furthermore, the bottom wall of the support bottom plate and the top wall of the sleeve top plate are arranged in close contact.

[0014] Furthermore, stiffening plates are provided on the side walls of the two partitions that are away from each other. The stiffening plates are arranged vertically with the partitions, and the ends of the stiffening plates that are away from the partitions are fixedly connected to the connecting sleeves.

[0015] Furthermore, the two partitions are symmetrically arranged in the connecting sleeve, and the lengths of the two partitions are adapted to the length of the connecting sleeve.

[0016] The present invention has the following beneficial effects: 1. The present invention provides a connection hole on the photovoltaic truss support, sets a connecting sleeve at the top position of the prefabricated pipe pile body, and cooperates with the reversing screw, locking nut, anchor plate, partition and other structures, and locks the reversing screw on the photovoltaic truss support through the locking nut, and sets the top wall of the anchor plate and the bottom walls of the two partitions tightly, so that the connecting sleeve and the photovoltaic truss support can be connected together through the reversing screw, thereby completing the connection between the photovoltaic truss body and the prefabricated pipe pile body. Compared with the prior art, there is no need to perform welding operations during offshore operations. At the same time, compared with the traditional side-entry bolt connection structure, the vertical screw connection structure can not only ensure that the stress distributed on the screw is more evenly distributed and avoid the occurrence of local stress concentration, but also facilitates the installation work for the operator, so that the operator does not need to adjust his position and angle all the time. It has the advantages of easy installation, improved construction efficiency and high overall structural strength.

[0017] 2. The present invention realizes compression through the contact surface between the support bottom plate and the sleeve top plate and the contact surface between the sleeve top plate and the end plate, realizes shear through the friction force generated by the pre-pressure on the contact surface between the support bottom plate and the sleeve top plate, and realizes tension through the setting of the reversing screw, thereby forming a stable connection structure with three-way force. At the same time, the circular tube shear key can provide limiting protection when the shear force on the friction surface is too large in extreme cases, resulting in slippage between the support bottom plate and the sleeve top plate, thereby further enhancing the structural strength of the connection structure, which has the advantage of high structural strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is the enlarged view of point A; Figure 3 A top view of the photovoltaic truss support in the present invention; Figure 4 It is a top view of the connecting sleeve in the present invention.

[0019] The reference numerals in the figure are as follows: 1. Photovoltaic truss body; 2. Prefabricated pipe pile body; 3. Photovoltaic truss support; 301. Connection hole; 302. Support vertical plate; 303. Support bottom plate; 4. Reversing screw; 5. Locking nut; 6. Anchor plate; 7. Connecting sleeve; 8. Partition plate; 9. Nut pad; 10. Round tube shear key; 11. Sleeve top plate; 12. Square hole; 13. End plate; 14. Stiffening plate. DETAILED DESCRIPTION

[0020] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Example: Please refer to Figures 1 to 4 The present embodiment provides a connection structure of a reversing screw 4 for connecting an offshore photovoltaic truss with a prefabricated pipe pile, comprising a photovoltaic truss body 1 and a prefabricated pipe pile body 2 arranged below the photovoltaic truss body 1, a photovoltaic truss support 3 is arranged at the bottom of the photovoltaic truss body 1, and the photovoltaic truss support 3 comprises a symmetrically arranged support vertical plate 302, the support vertical plate 302 is vertically arranged at the bottom of the photovoltaic truss body 1, the top walls of the support vertical plates 302 on both sides are welded to the bottom wall of the photovoltaic truss body 1, and the bottoms of the support vertical plates 302 on both sides are welded with a horizontally arranged support bottom plate 303, and the support bottom plate 303 is connected to the support vertical plates 302 on both sides. A connection hole 301 penetrating the support bottom plate 303 is opened at the middle position of the support bottom plate 303, and a reversing screw 4 is movably inserted in the connection hole 301, and both ends of the reversing screw 4 pass through the corresponding side openings of the connection hole 301. A locking nut 5 is locked into the top of the reversing screw 4, and the locking nut 5 is pressed against the support bottom plate 303 to lock the reversing screw 4 on the support bottom plate 303. An anchor plate 6 with a rectangular structure is provided at the bottom of the reversing screw 4. The reversing screw 4 and the anchor plate 6 are fixedly connected together by perforation plug welding, and the connection position of the reversing screw 4 and the anchor plate 6 is in the middle of the anchor plate 6. The size parameters of the reversing screw 4 and the size parameters of the anchor plate 6 are customized according to actual conditions. In this embodiment, the radius of the reversing screw 4 is calculated using the following formula: .

[0022] In the formula, A2 represents the cross-sectional area of ​​the reversing screw 4, T represents the tensile bearing capacity of the reversing screw 4, the value of T is determined according to the actual design value, and σ2 represents the tensile strength of the material used to make the connecting sleeve;

[0023] In the formula, r represents the radius of the reversing screw 4, A2 represents the cross-sectional area of ​​the reversing screw 4, and π represents the pi constant.

[0024] The thickness of the anchor plate 6 is calculated using the following formula:

[0025] Wherein, t represents the thickness of the anchor plate 6, M represents the bending moment transmitted from the photovoltaic truss body 1 to the anchor plate 6, and the value of M is determined according to the actual design value, b represents the width of the anchor plate 6, and the value of b is determined according to the actual situation, and f b It indicates the bending strength of the material used to make the anchor plate 6.

[0026] A connecting sleeve 7 is provided at the top of the prefabricated pipe pile body 2, and the size parameters of the connecting sleeve 7 are customized according to actual conditions. In this embodiment, the diameter of the connecting sleeve is calculated using the following formula:

[0027] In the formula, A1 represents the diameter of the connecting sleeve, P represents the pressure that the connecting sleeve needs to withstand, P is determined according to the actual design value, and σ1 represents the allowable stress of the material used to make the connecting sleeve; The length of the connecting sleeve is calculated using the following formula: .

[0028] Where L is the length of the connecting sleeve, π is the pi constant, EI is the elastic modulus of the material used to make the connecting sleeve, k is the effective length coefficient, which is 2, and P cr Represents the critical buckling load of the material used to make the connecting sleeve.

[0029] Two partitions 8 are arranged inside the connecting sleeve 7. The two partitions 8 are symmetrically arranged inside the connecting sleeve, and the length of the two partitions 8 is adapted to the length of the connecting sleeve. The spacing between the two partitions 8 is longer than the shortest side of the anchor plate 6 but shorter than the longest side of the anchor plate 6, so that the anchor plate 6 can pass through the two partitions 8 by adjusting its own angle, that is, when the shortest side of the anchor plate 6 is perpendicular to the two partitions 8. The spacing between the two partitions 8 is also set to be larger than the diameter of the reversing screw 4, so that the reversing screw 4 can pass through the two partitions 8. The length of the reversing screw 4 is set to meet the requirement that when the top is fixed to the bottom plate of the base by the locking nut 5, its bottom can pass out from the bottom of the connecting sleeve 7, and the top wall of the anchor plate 6 and the bottom walls of the two partitions 8 can be set in close contact, so as to complete the connection between the photovoltaic truss body 1 and the prefabricated pipe pile body 2 by connecting the connecting sleeve 7 and the support bottom plate 303 together.

[0030] In order to improve the stability of the locking nut 5 when locking the reversing bolt, in this embodiment, a nut pad 9 is arranged between the locking nut 5 and the support bottom plate 303, and the reversing screw 4 is arranged to movably pass through the nut pad 9. When the locking nut 5 locks the reversing screw 4 on the support bottom plate 303, the top wall of the nut pad 9 is closely arranged with the bottom wall of the locking nut 5, and the bottom wall of the nut pad 9 is closely arranged with the top wall of the support bottom plate 303. Through the arrangement of the nut pad 9, the nut pad 9 can improve the stability of the locking nut 5 by increasing the contact area, prevent the locking nut 5 from tilting during the tightening process, and at the same time, it can also disperse the pressure of the locking nut 5 on the surface of the supported bottom plate 303 by increasing the contact area, thereby reducing local stress concentration.

[0031] In order to strengthen the connection stability of the two partitions 8 in the connecting sleeve, in this embodiment, stiffening plates 14 are provided on the side walls of the two partitions 8 away from each other, and the stiffening plates 14 on both sides are arranged perpendicularly to the corresponding partitions 8, and the ends of the stiffening plates 14 on both sides away from the corresponding partitions 8 are fixedly connected to the inner wall of the connecting sleeve 7. The stiffening plates 14 cooperate with the partitions 8 to form a T-shaped structure in the connecting sleeve 7, which can not only strengthen the connection stability of the partitions 8 in the connecting sleeve, but also enhance the overall structural strength of the connecting sleeve 7, making it less likely to deform.

[0032] In this embodiment, a sleeve top plate 11 is fixedly provided on the top of the connecting sleeve 7. The diameter of the connecting sleeve 7 is set smaller than the inner diameter of the prefabricated pipe pile body 2 so that it can be inserted into the prefabricated pipe pile body 2. The diameter of the sleeve top plate 11 is set larger than the inner diameter of the prefabricated pipe pile body 2 so that it can cover the top of the prefabricated pipe pile body 2. The connecting sleeve 7 is extended from the top of the prefabricated pipe pile body 2 into the prefabricated pipe pile body 2. An end plate 13 is provided on the top of the prefabricated pipe pile body 2. The bottom wall of the sleeve top plate 11 is fixedly connected to the top wall of the end plate 13, and can be welded together using a circumferential welding process. A square hole 12 is provided on the sleeve top plate 11. The square hole 12 is connected to the space between the two partitions 8 in the connecting sleeve 7, and the center line of the square hole 12 is also coincident with the center line of the space between the two partitions 8. The shortest side of the square hole 12 is longer than the shortest side of the anchor plate 6, so that the subsequent anchor plate 6 can pass through the square hole 12 and enter between the two partitions 8. The shortest side of the square hole 12 is also larger than the diameter of the reversing bolt to facilitate the passage of the reversing bolt. At the same time, when the reversing screw 4 completes the connection between the photovoltaic truss body 1 and the prefabricated pipe pile body 2, the bottom wall of the support bottom plate 303 is also closely attached to the top wall of the sleeve top plate 11.

[0033] Through the above-mentioned settings, compression is achieved through the contact surface between the support bottom plate 303 and the sleeve top plate 11 and the contact surface between the sleeve top plate 11 and the end plate 13. Shear is achieved through the friction force generated by the prepressure on the contact surface between the support bottom plate 303 and the sleeve top plate 11. Tension is achieved through the setting of the reversing screw 4, thereby forming a stable connection structure with three-way force, which can well connect the photovoltaic truss body 1 and the prefabricated pipe pile body 2 together.

[0034] In order to further strengthen the structural strength of the connection structure, in this embodiment, a round tube shear key 10 is also threadedly connected to the reversing screw 4. The top wall of the round tube shear key 10 is closely set with the bottom wall of the support bottom plate 303. The round tube shear key 10 is movable through the square hole 12 and enters between the two partitions 8. The top of the round tube shear key 10 is set in the square hole 12. The diameter of the round tube shear key 10 can be adapted to the shortest side of the square hole 12, so that the side wall of the round tube shear key 10 can be set against the side wall of the square hole 12. Through the above-mentioned setting, the round tube shear key 10 can provide limit protection through the contact between the outer wall and the hole wall of the square hole 12 when the shear force on the contact surface between the support bottom plate 303 and the sleeve top plate 11 is too large in extreme cases, resulting in slippage between the support bottom plate 303 and the sleeve top plate 11. In this way, the occurrence of slippage can be avoided, thereby strengthening the structural strength of the connection structure.

[0035] The construction method of this embodiment: Step 1: Pre-install the connecting sleeve on the prefabricated pipe pile body 2, pre-open the connecting hole 301 on the support base plate 303 in the photovoltaic truss body 1, then thread the round tube shear key 10 into the reversing screw 4, and then pre-place the reversing screw 4 on the support base plate 303, and at the same time, pre-install the locking nut 5 and the nut pad 9. It should be noted that at this time, the locking nut 5 does not lock the reversing screw 4.

[0036] Step 2: hoist and bury the prefabricated pipe pile body 2 into the corresponding position, then hoist the photovoltaic truss body 1 to the corresponding position above the prefabricated pipe pile body 2, and then when the offshore photovoltaic truss is in place, insert the reversing screw 4 on the support bottom plate 303 into the connecting sleeve 7 from the square hole 12, and let the reversing screw 4 pass through the bottom of the connecting sleeve 7. In order to allow the reversing screw 4 to be smoothly inserted into the connecting sleeve 7, at this time, the short side of the anchor plate 6 on the reversing screw 4 is set parallel to the short side of the square hole 12; Step 3: After the anchor plate 6 passes through the connecting sleeve 7, the reversing screw 4 is rotated 90 degrees so that the short side of the anchor plate 6 is perpendicular to the two partitions 8 in the connecting sleeve 7, and then the reversing anchor is pulled upward so that the top wall of the anchor plate 6 is closely set to the bottom walls of the two partitions 8, and the locking nut 5 is rotated so that the locking nut 5 locks the reversing screw 4 on the support bottom plate 303 and applies prestress, thereby realizing the tensile force resistance of the reversing screw 4. At this time, the connection between the photovoltaic truss body 1 and the prefabricated pipe pile body 2 is completed.

[0037] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A reversing screw (4) connection structure for connecting an offshore photovoltaic truss with a prefabricated pipe pile, comprising a photovoltaic truss body (1) and a prefabricated pipe pile body (2) arranged below the photovoltaic truss body (1), characterized in that: A photovoltaic truss support (3) is provided at the bottom of the photovoltaic truss body (1), a connection hole (301) is provided on the photovoltaic truss support (3), a reversing screw (4) is movably inserted in the connection hole (301), a locking nut (5) is locked at the top of the reversing screw (4), and the locking nut (5) locks the reversing screw (4) on the photovoltaic truss support (3), an anchor plate (6) is provided at the bottom of the reversing screw (4), a connecting sleeve (7) is provided at the top of the prefabricated pipe pile body (2), two partitions (8) are provided inside the connecting sleeve (7), the spacing between the two partitions (8) is longer than the shortest side of the anchor plate (6) but shorter than the longest side of the anchor plate (6), the reversing screw (4) passes through between the two partitions (8), and the top wall of the anchor plate (6) and the bottom walls of the two partitions (8) are both closely arranged.

2. A reversing screw (4) connection structure for connecting an offshore photovoltaic truss with a prefabricated pipe pile according to claim 1, characterized in that: The photovoltaic truss support (3) comprises a support vertical plate (302) and a support bottom plate (303), the support vertical plate is fixedly arranged at the bottom of the photovoltaic truss body (1), the connection hole (301) is opened on the support bottom plate (303), and the locking nut (5) locks the reversing screw (4) on the support bottom plate (303).

3. A reversing screw (4) connection structure for connecting an offshore photovoltaic truss with a prefabricated pipe pile according to claim 2, characterized in that: A nut pad (9) is arranged between the locking nut (5) and the support base plate (303), and the reversing screw (4) is movably arranged to pass through the nut pad (9). When the locking nut (5) locks the reversing screw (4) on the support base plate (303), the top wall of the nut pad (9) is closely arranged with the bottom wall of the locking nut (5), and the bottom wall of the nut pad (9) is closely arranged with the top wall of the support base plate (303).

4. A connection structure of a reversing screw (4) for connecting an offshore photovoltaic truss with a prefabricated pipe pile according to claim 2, characterized in that: The reversing screw (4) is also threadedly connected with a round tube shear key (10), the top wall of the round tube shear key (10) is closely arranged with the bottom wall of the support bottom plate (303), and the round tube shear key (10) enters between the two partitions (8).

5. A connection structure of a reversing screw (4) for connecting an offshore photovoltaic truss with a prefabricated pipe pile according to claim 4, characterized in that: A sleeve top plate (11) is arranged at the top of the connecting sleeve (7); the diameter of the connecting sleeve (7) is smaller than the inner diameter of the prefabricated pipe pile body (2); the diameter of the sleeve top plate (11) is larger than the inner diameter of the prefabricated pipe pile body (2); the connecting sleeve (7) is arranged to extend from the top of the prefabricated pipe pile body (2) into the prefabricated pipe pile body (2); and the bottom wall of the sleeve top plate (11) is fixedly connected to the top of the prefabricated pipe pile body (2).

6. A connection structure of a reversing screw (4) for connecting an offshore photovoltaic truss with a prefabricated pipe pile according to claim 5, characterized in that: A square hole (12) is provided on the sleeve top plate (11), the square hole (12) is connected to the space between the two partitions (8) in the connecting sleeve (7), the shortest side of the square hole (12) is longer than the shortest side of the anchor plate (6), and the round tube shear key (10) is movably arranged to pass through the square hole (12).

7. A connection structure of a reversing screw (4) for connecting an offshore photovoltaic truss with a prefabricated pipe pile according to claim 5, characterized in that: An end plate (13) is provided on the top of the prefabricated pipe pile body (2), and the bottom wall of the sleeve top plate (11) and the top wall of the end plate (13) are welded together.

8. A reversing screw (4) connection structure for connecting an offshore photovoltaic truss with a prefabricated pipe pile according to claim 7, characterized in that: The bottom wall of the support bottom plate (303) and the top wall of the sleeve top plate (11) are arranged in close contact.

9. A reversing screw (4) connection structure for connecting an offshore photovoltaic truss with a prefabricated pipe pile according to claim 1, characterized in that: A stiffening plate (14) is provided on the side walls of the two partitions (8) that are away from each other. The stiffening plate (14) and the partition (8) are arranged vertically. The end of the stiffening plate (14) away from the partition (8) is also fixedly connected to the connecting sleeve (7).

10. A connection structure of a reversing screw (4) for connecting an offshore photovoltaic truss with a prefabricated pipe pile according to claim 1, characterized in that: The two partitions (8) are symmetrically arranged in the connecting sleeve, and the lengths of the two partitions (8) are adapted to the length of the connecting sleeve.

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