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

Abstract

The utility model relates to the technical field of offshore photovoltaic power stations, and discloses a reversing screw connecting structure for connecting an offshore photovoltaic truss and a prefabricated pipe pile, which comprises a photovoltaic truss body and a prefabricated pipe pile body 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 utility model has the advantages that the installation is convenient, the construction efficiency is improved, and the overall structural strength is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to a reversing screw rod connecting structure for offshore photovoltaic truss and prefabricated pipe pile connection belongs to offshore photovoltaic power station's technical field. BACKGROUND

[0002] In offshore photovoltaic power station construction, prefabricated pipe pile foundation is a common form, but the connection and installation of offshore photovoltaic truss and prefabricated pipe pile is one of the key points and difficulties. The common connection method at present is to weld the support of truss and the top plate of pile. However, due to the influence of wind and waves at sea, the welding operation is difficult and dangerous.

[0003] Therefore, in the prior art, Chinese patent application No. 202321498355.9 discloses a truss type large span support suitable for offshore photovoltaic projects, which sets a basin type support structure, and the basin type support structure is connected with the side insertion type of the support leg base, which simplifies the connection and positioning process of the overall or block hoisting of offshore photovoltaic support structure, avoids the inconvenience of traditional welding connection in offshore construction, and has the advantages of reducing operation difficulty and operation danger. But there are still some problems in actual use:

[0004] 1. The structure of side insertion type bolt connection needs to screw the bolt from both sides, so the space requirement is high, and the space for connecting offshore photovoltaic truss and prefabricated pipe pile is small, which is limited by the installation space. The operator may need to adjust his position and angle at any time to perform the corresponding installation work, which is troublesome and has low construction efficiency.

[0005] 2. The structure of side insertion type bolt connection is easy to make the stress on the bolt uneven, and may cause local stress concentration, which will affect the strength and durability of the whole structure. SUMMARY

[0006] In order to solve the above problems existing in the prior art, the utility model provides a reversing screw rod connecting structure for offshore photovoltaic truss and prefabricated pipe pile connection.

[0007] The technical scheme of the utility model is as follows:

[0008] The application discloses a reversing screw connecting structure for connecting a marine photovoltaic truss with a prefabricated pipe pile, which comprises a photovoltaic truss body and a prefabricated pipe pile body arranged below the photovoltaic truss body.

[0009] Further, the photovoltaic truss support comprises 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 connecting hole is arranged on the support bottom plate, and the reversing screw is locked on the support bottom plate by the locking nut.

[0010] Further, a nut pad is arranged between the locking nut and the support bottom plate, the reversing screw is movably arranged through the nut pad, and when the reversing screw is locked on the support bottom plate by the locking nut, the top wall of the nut pad is tightly arranged with the bottom wall of the locking nut, and the bottom wall of the nut pad is tightly arranged with the top wall of the support bottom plate.

[0011] Further, a round pipe shear key is threadedly connected to the reversing screw, the top wall of the round pipe shear key is tightly arranged with the bottom wall of the support bottom plate, and the round pipe shear key is arranged between the two partitions.

[0012] Further, a sleeve top plate is arranged 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 arranged in the prefabricated pipe pile body from the top of the prefabricated pipe pile body, and the bottom wall of the sleeve top plate is fixedly connected with the top of the prefabricated pipe pile body.

[0013] Further, a square hole is arranged on the sleeve top plate, the square hole is in communication with 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 pipe shear key is movably arranged through the square hole.

[0014] Further, an end plate is arranged at the top of the prefabricated pipe pile body, and the bottom wall of the sleeve top plate is welded with the top wall of the end plate.

[0015] Further, the bottom wall of the support bottom plate is tightly arranged with the top wall of the sleeve top plate.

[0016] Further, the two side walls of the partition plates away from each other are provided with stiffening plates, the stiffening plates are vertically arranged with the partition plates, and the end of the stiffening plate away from the partition plate is further fixedly connected with the connecting sleeve.

[0017] Further, the two partition plates are symmetrically arranged in the connecting sleeve, and the length of the two partition plates is adaptively arranged with the length of the connecting sleeve.

[0018] The utility model has the advantages of the following beneficial effects:

[0019] 1. The utility model discloses a connecting hole is set up on the photovoltaic truss support, a connecting sleeve is arranged at the top position of the prefabricated pipe pile body, and reversing screw, locking nut, anchor plate, partition plate and other structures are arranged, the reversing screw is locked on the photovoltaic truss support through the locking nut, the top wall of the anchor plate is tightly arranged with the bottom wall of the two partition plates, so that the connecting sleeve and the photovoltaic truss support are connected together through the reversing screw, thereby the connection of the photovoltaic truss body and the prefabricated pipe pile body is completed, compared with the prior art, welding operation is not needed when working at sea, meanwhile, the vertical screw connection structure can not only ensure that the stress distributed on the screw is more uniform, avoids the situation that local stress is concentrated, but also facilitates the installation work of the operator, so that the operator does not need to adjust his position and angle all the time, and the utility model has the advantages of convenient installation, improved construction efficiency and high overall structural strength.

[0020] 2. The utility model discloses a contact surface of the support bottom plate and the sleeve top plate and the contact surface of the sleeve top plate and the end plate are welded to realize pressure, realize shearing through the friction force generated by the pre-pressure on the contact surface of the support bottom plate and the sleeve top plate, realize tension through the setting of the reversing screw, so that a stable connection structure of three-way stress is formed, meanwhile, the round pipe shear key can provide limiting protection when the shearing force of the friction surface is too large to cause the slip between the support bottom plate and the sleeve top plate in extreme conditions, so that the structural strength of the connection structure can be further strengthened, and the utility model has the advantages of high structural strength. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 It is the structural schematic diagram of the utility model;

[0022] Fig. 2 It is the enlarged view of A;

[0023] Fig. 3 It is the plan view of the photovoltaic truss support in the utility model;

[0024] Fig. 4 It is the plan view of the connecting sleeve in the utility model.

[0025] The reference signs in the drawings are represented as:

[0026] 1, photovoltaic truss body; 2, prefabricated pipe pile body;

[0027] 3, photovoltaic truss support; 301, connecting hole; 302, support vertical plate; 303, support bottom plate;

[0028] 4, reversing screw; 5, locking nut; 6, anchor plate; 7, connecting sleeve; 8, partition plate; 9, nut pad; 10, round pipe shear key; 11, sleeve top plate; 12, square hole; 13, end plate; 14, stiffener plate. DETAILED DESCRIPTION

[0029] The utility model will be explained in detail below in combination with the drawings and specific embodiments.

[0030] Embodiment: please refer to Figs. 1-4 , the embodiment provides a kind of reversing screw 4 connecting structure for offshore photovoltaic truss and prefabricated pipe pile connection, including photovoltaic truss body 1 and the prefabricated pipe pile body 2 being set to photovoltaic truss body 1 below, the bottom of photovoltaic truss body 1 is provided with photovoltaic truss support 3, photovoltaic truss support 3 includes the support vertical plate 302 of symmetric setting, support vertical plate 302 is vertically arranged and set to the bottom of photovoltaic truss body 1, the top wall of both sides support vertical plate 302 is welded together with the bottom wall of photovoltaic truss body 1, the bottom of both sides support vertical plate 302 is welded with the support bottom plate 303 of horizontal arrangement, support bottom plate 303 is connected with both sides support vertical plate 302. The middle position of support bottom plate 303 is provided with the connecting hole 301 passing through support bottom plate 303, reversing screw 4 is movably arranged in connecting hole 301, and both ends of reversing screw 4 are arranged from the corresponding side hole of connecting hole 301. Locking nut 5 is locked in the top of reversing screw 4, and the locking nut 5 is locked on the support bottom plate 303 by pressing to lock reversing screw 4 on the support bottom plate 303, and the bottom of reversing screw 4 is provided with the anchor plate 6 of rectangular structure, and reversing screw 4 and anchor plate 6 are fixedly connected by means of hole plug welding, and the connecting position of reversing screw 4 and anchor plate 6 is in the middle position of anchor plate 6. The size parameters of reversing screw 4 and the size parameters of anchor plate 6 are customized according to actual situation, in the embodiment, the radius of reversing screw 4 is calculated using the following formula:

[0031] .

[0032] In the formula, A2 represents the cross-sectional area of reversing screw 4, T represents the tensile load capacity of reversing screw 4, the value of T is determined according to the actual design value, and σ2 represents the tensile strength of the material for making connecting sleeve;

[0033]

[0034] In the formula, r represents the radius of the reversing screw rod 4, A2 represents the cross-sectional area of the reversing screw rod 4, and π represents the constant of the circular ratio.

[0035] The thickness of the anchor plate 6 is calculated by the following formula:

[0036]

[0037] In the formula, t represents the thickness of the anchor plate 6, M represents the bending moment transmitted by the photovoltaic truss body 1 to the anchor plate 6, the value of M is determined according to the actual design value, b represents the width of the anchor plate 6, the value of b is determined according to the actual situation, f b represents the bending strength of the material for manufacturing the anchor plate 6.

[0038] The top of the prefabricated pipe pile body 2 is provided with a connecting sleeve 7, and the size parameters of the connecting sleeve 7 are customized according to the actual situation. In this embodiment, the diameter of the connecting sleeve is calculated by the following formula:

[0039]

[0040] In the formula, A1 represents the diameter of the connecting sleeve, P represents the pressure required to be borne by the connecting sleeve, the value of P is determined according to the actual design value, and σ1 represents the allowable stress of the material for manufacturing the connecting sleeve;

[0041] The length of the connecting sleeve is calculated by the following formula:

[0042] .

[0043] In the formula, L represents the length of the connecting sleeve, π represents the constant of the circular ratio, EI represents the elastic modulus of the material for manufacturing the connecting sleeve, k represents the effective length coefficient, and the value is 2, P cr represents the critical buckling load of the material for manufacturing the connecting sleeve.

[0044] The connecting sleeve 7 is internally provided with two partitions 8, which are symmetrically arranged in the connecting sleeve, and the length of the two partitions 8 is adapted to the length of the connecting sleeve. The distance 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 between the two partitions 8 by adjusting the angle of the anchor plate 6, that is, the shortest side of the anchor plate 6 is perpendicular to the two partitions 8. The distance between the two partitions 8 is also greater than the diameter of the reversing screw 4, so that the reversing screw 4 can pass between the two partitions 8. The length of the reversing screw 4 is arranged to be fixed to the bottom plate of the base by the top locking nut 5, so that the bottom of the reversing screw 4 can be outwardly out of the bottom of the connecting sleeve 7, and the top wall of the anchor plate 6 and the bottom wall of the two partitions 8 can be closely arranged, so as to connect the connecting sleeve 7 and the base bottom plate 303 together, thereby completing the connection of the photovoltaic truss body 1 and the prefabricated pipe pile body 2.

[0045] In order to improve the stability of the locking nut 5 when locking the reversing screw, in the embodiment, a nut backing plate 9 is arranged between the locking nut 5 and the base bottom plate 303, and the reversing screw 4 is movably arranged through the nut backing plate 9. When the locking nut 5 locks the reversing screw 4 on the base bottom plate 303, the top wall of the nut backing plate 9 is closely arranged with the bottom wall of the locking nut 5, and the bottom wall of the nut backing plate 9 is closely arranged with the top wall of the base bottom plate 303. Through the arrangement of the nut backing plate 9, the nut backing plate 9 can increase the contact area, thereby improving the stability of the locking nut 5 and preventing the locking nut 5 from tilting during tightening. At the same time, the nut backing plate 9 can also increase the contact area to disperse the pressure of the locking nut 5 on the surface of the base bottom plate 303 and reduce local stress concentration.

[0046] In order to strengthen the connection stability of the two partitions 8 in the connecting sleeve, in the embodiment, a stiffener 14 is arranged on the side wall of each of the two partitions 8 away from each other, and the two side stiffeners 14 are vertically arranged with the corresponding partitions 8. The end of each of the two side stiffeners 14 away from the corresponding partition 8 is fixedly connected with the inner wall of the connecting sleeve 7. The stiffener 14 cooperates with the partition 8 to form a T-shaped structure in the connecting sleeve 7, which not only strengthens the connection stability of the partition 8 in the connecting sleeve, but also enhances the overall structural strength of the connecting sleeve 7, so that it is not easy to deform.

[0047] In the embodiment, the top of the connecting sleeve 7 is fixedly provided with a sleeve top plate 11, the diameter of the connecting sleeve 7 is smaller than the inner diameter of the prefabricated pipe pile body 2, so as to be able to penetrate into the prefabricated pipe pile body 2, the diameter of the sleeve top plate 11 is greater than the inner diameter of the prefabricated pipe pile body 2, so as to be able to cover the top of the prefabricated pipe pile body 2, the connecting sleeve 7 is arranged to penetrate into the prefabricated pipe pile body 2 from the top of the prefabricated pipe pile body 2, the top of the prefabricated pipe pile body 2 is provided with an end plate 13, the bottom wall of the sleeve top plate 11 and the top wall of the end plate 13 are fixedly connected together, which can be welded by using a surrounding welding process. The sleeve top plate 11 is provided with a square hole 12, the square hole 12 is in communication with the space between the two partitions 8 in the connecting sleeve 7, and the center line of the square hole 12 is coincided 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 anchor plate 6 can pass through the square hole 12 and enter between the two partitions 8, and the shortest side of the square hole 12 is greater than the diameter of the reversing screw bolt, so that the reversing screw bolt can pass through. At the same time, when the reversing screw rod 4 is connected with the photovoltaic truss body 1 and the prefabricated pipe pile body 2, the bottom wall of the support bottom plate 303 is tightly arranged with the top wall of the sleeve top plate 11.

[0048] Through the abovementioned arrangement, 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 are tightly arranged, so as to realize compression, the friction force generated by the pre-pressure on the contact surface between the support bottom plate 303 and the sleeve top plate 11 is used to realize shearing, and the reversing screw rod 4 is used to realize tension, so as to form a stable connection structure with three-way stress, so as to well connect the photovoltaic truss body 1 and the prefabricated pipe pile body 2 together.

[0049] In order to further strengthen the structural strength of the connection structure, in the embodiment, the reversing screw rod 4 is further threadedly connected with a circular pipe shear key 10, the top wall of the circular pipe shear key 10 is tightly arranged with the bottom wall of the support bottom plate 303, the circular pipe shear key 10 is arranged to pass through the square hole 12 and enter between the two partitions 8, the top of the circular pipe shear key 10 is arranged in the square hole 12, and the diameter of the circular pipe shear key 10 can be adapted to the shortest side of the square hole 12, so that the side wall of the circular pipe shear key 10 can abut against the side wall of the square hole 12. Through the abovementioned arrangement, when the contact surface between the support bottom plate 303 and the sleeve top plate 11 is subjected to excessive shearing force in an extreme case, the circular pipe shear key 10 can provide limiting protection by abutting against the hole wall of the square hole 12, so as to avoid the sliding phenomenon, so as to strengthen the structural strength of the connection structure.

[0050] Construction method of the embodiment:

[0051] Step 1: the connecting sleeve is pre-installed on the prefabricated pipe pile body 2, the connecting hole 301 is pre-opened on the support base plate 303 in the photovoltaic truss body 1, then the round pipe shear key 10 is screwed into the reversing screw rod 4, then the reversing screw rod 4 is pre-placed on the support base plate 303, and the locking nut 5 and the nut pad plate 9 are pre-installed synchronously, and it should be noted that at this time, the locking nut 5 does not lock the reversing screw rod 4.

[0052] Step 2: the prefabricated pipe pile body 2 is hoisted and buried in the corresponding position, then the photovoltaic truss body 1 is hoisted to the corresponding position above the prefabricated pipe pile body 2, then when the offshore photovoltaic truss is in place, the reversing screw rod 4 on the support base plate 303 is inserted into the connecting sleeve 7 from the square hole 12, and the reversing screw rod 4 is allowed to pass out from the bottom of the connecting sleeve 7, in order to allow the reversing screw rod 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 rod 4 is arranged parallel to the short side of the square hole 12;

[0053] Step 3: after the anchor plate 6 passes out of the connecting sleeve 7, the reversing screw rod 4 is rotated by 90 degrees, so that the short side of the anchor plate 6 is perpendicular to the two partitions 8 in the connecting sleeve 7, then the anchor plate 6 is pulled upward to make the top wall of the anchor plate 6 abut the bottom wall of the two partitions 8, the locking nut 5 is rotated to lock the reversing screw rod 4 on the support base plate 303, and the prestress is applied, so that the reversing screw rod 4 is subjected to tensile stress, at this time, the connection of the photovoltaic truss body 1 and the prefabricated pipe pile body 2 is completed.

[0054] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation according to the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. A reversing screw (4) connecting structure for connecting a marine 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: The bottom of the photovoltaic truss body (1) is provided with a photovoltaic truss support (3), a connecting hole (301) is formed in the photovoltaic truss support (3), a reversing screw (4) is movably arranged in the connecting hole (301), a locking nut (5) is locked on the top of the reversing screw (4), the locking nut (5) locks the reversing screw (4) on the photovoltaic truss support (3), an anchor plate (6) is arranged on the bottom of the reversing screw (4), a connecting sleeve (7) is arranged at the top of the prefabricated pipe pile body (2), two partitions (8) are arranged in the connecting sleeve (7), the distance 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 between the two partitions (8), and the top wall of the anchor plate (6) and the bottom wall of the two partitions (8) are tightly arranged.

2. A reversing screw (4) connection configuration for the connection of a marine photovoltaic trestle to 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 connecting hole (301) is formed in 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 configuration for the connection of a marine photovoltaic trestle to a prefabricated pipe pile according to claim 2, characterized in that: The locking nut (5) and the support bottom plate (303) are provided with a nut pad (9), the reversing screw (4) is movably arranged 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) and the bottom wall of the locking nut (5) are tightly arranged, and the bottom wall of the nut pad (9) and the top wall of the support bottom plate (303) are tightly arranged.

4. A reversing screw (4) connection configuration for the connection of a marine photovoltaic trestle to a prefabricated pipe pile according to claim 2, characterized in that: The reversing screw (4) is further threadedly connected with a round pipe shear key (10), the top wall of the round pipe shear key (10) and the bottom wall of the support bottom plate (303) are tightly arranged, and the round pipe shear key (10) enters between the two partitions (8).

5. A reversing screw (4) connection configuration for the connection of a marine photovoltaic trestle to a prefabricated pipe pile according to claim 4, characterized in that: The top of the connecting sleeve (7) is provided with a sleeve top plate (11), 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 in the prefabricated pipe pile body (2) from the top of the prefabricated pipe pile body (2), and the bottom wall of the sleeve top plate (11) is fixedly connected with the top of the prefabricated pipe pile body (2).

6. A reversing screw (4) connection configuration for the connection of a marine photovoltaic trestle to a prefabricated pipe pile according to claim 5, characterized in that: The sleeve top plate (11) is provided with a square hole (12), the square hole (12) is in communication with 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 pipe shear key (10) movably passes through the square hole (12).

7. A reversing screw (4) connection configuration for the connection of a marine photovoltaic trestle to a prefabricated pipe pile according to claim 5, characterized in that: The top of the prefabricated pipe pile body (2) is provided with an end plate (13), 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 configuration for the connection of a marine photovoltaic trestle to 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 tightly arranged.

9. A reversing screw (4) connection configuration for the connection of a marine photovoltaic trestle to a prefabricated pipe pile according to claim 1, characterized in that: The two said partition plates (8) are provided with stiffening plates (14) on the mutually distal side walls, the stiffening plates (14) are vertically arranged with the partition plates (8), and the end of the distal stiffening plate (14) from the partition plate (8) is fixedly connected with the connecting sleeve (7).

10. A reversing screw (4) connection configuration for the connection of a marine photovoltaic trestle to a prefabricated pipe pile according to claim 1, characterized in that: The two said partition plates (8) are symmetrically arranged in the connecting sleeve, and the length of the two partition plates (8) is adaptively arranged with the length of the connecting sleeve.

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