Tubular cross-section member connecting structure, photovoltaic support and connecting method

Abstract

The application relates to the technical field of photovoltaic support, in particular to a small pipe section component connecting structure and a connecting method, which comprises a main pipe, a lining pipe arranged in the interior of the main pipe and attached to the inner wall of the main pipe, and a sleeve pipe sleeved on the exterior of the main pipe; the main pipe, the lining pipe and the sleeve pipe are all provided with corresponding bolt holes; fastening bolts penetrate the bolt holes of the sleeve pipe, the main pipe and the lining pipe and fixedly connect the three; the lining pipe and the sleeve pipe form extrusion friction force on the side wall of the main pipe through the pre-tightening force of the fastening bolts. The application has the effect of improving the node strength of the fiber-reinforced composite photovoltaic support.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic support, in particular to a small pipe section component connecting structure and a connecting method. BACKGROUND

[0002] At present, photovoltaic supports mostly adopt steel structures, which are heavy, difficult to transport and construct, high in cost, and easy to corrode in natural environment, especially in marine environment. In recent years, engineers have introduced fiber reinforced composite materials (FRP) into photovoltaic supports, which has produced good engineering effects. Fiber materials are light in weight and easy to transport, and the corrosion resistance of fiber materials is better than that of metal structures, but due to the anisotropy problem of fiber materials, the conventional bolt connection is prone to extrusion deformation or even damage of bolt holes under external force, resulting in loose connection and affecting the overall problem of photovoltaic supports. Therefore, the current node connection problem is a key problem affecting the popularization and application of FRP. SUMMARY

[0003] In order to improve the node strength of the photovoltaic support using fiber reinforced composite materials, the present application provides a small pipe section component connecting structure, a photovoltaic support and a connecting method.

[0004] The first technical purpose of the present application is to provide a small pipe section component connecting structure adopting the following technical scheme: comprising a main pipe,

[0005] an inner liner pipe arranged inside the main pipe and attached to the inner wall of the main pipe;

[0006] an outer sleeve pipe sleeved outside the main pipe;

[0007] the main pipe, the inner liner pipe and the outer sleeve pipe are all provided with mutually corresponding bolt holes;

[0008] a fastening bolt penetrating the bolt holes of the outer sleeve pipe, the main pipe and the inner liner pipe to fixedly connect the three;

[0009] the inner liner pipe and the outer sleeve pipe form extrusion friction force on the side wall of the main pipe through the pre-tightening force of the fastening bolt.

[0010] By adopting the above technical scheme, under the pre-tightening force of the fastening bolt, the outer sleeve pipe and the inner liner pipe jointly provide extrusion friction force on the side wall of the main pipe, thereby forming frictional force transmission before the bolt hole, and the bolt hole wall pressure transmission, both of which jointly provide connection bearing capacity, thereby reducing the hole wall pressure, protecting the hole wall from pressure damage, and further improving the connection bearing capacity of the entire direct structure. Thus, compared with the prior art, the node structure of the photovoltaic support can be enhanced.

[0011] Optionally, the inner liner tube is provided with an anti-buckling sleeve inside, two ends of the anti-buckling sleeve abut against the opposite two inner side walls of the inner liner tube, and is aligned with the bolt hole on the inner liner tube.

[0012] By adopting the above technical scheme, the bending deformation of the side wall of the inner liner tube under the action of the bolt axial force is resisted.

[0013] Optionally, the inner liner tube is connected with an alignment sheet, two ends of the alignment sheet are flush with two ends of the inner liner tube, and the anti-buckling sleeve passes through the alignment sheet and is connected with the alignment sheet.

[0014] By adopting the above technical scheme, in the processing process, the anti-buckling sleeve can be sent into the inner liner tube by relying on the alignment sheet, and the anti-buckling sleeve can be aligned with the bolt hole on the inner liner tube by relying on the characteristic that the two ends of the alignment sheet are flush with the two ends of the inner liner tube, thereby facilitating the accurate alignment processing of the anti-buckling sleeve.

[0015] Optionally, the inner wall of the inner liner tube is provided with a guide groove, the guide groove extends inward from the edge of the inner liner tube, and the end of the anti-buckling sleeve is located in the guide groove.

[0016] By adopting the above technical scheme, in the processing process, the anti-buckling sleeve can be guided by relying on the guide groove, and the anti-buckling sleeve can be aligned with the bolt hole on the inner liner tube by being sent into the inner liner tube along the guide groove when the anti-buckling sleeve is moved to the end of the guide groove.

[0017] Optionally, limit holes are formed in the two ends of the inner liner tube, the limit holes extend from the end to the middle of the inner liner tube, the inner side of the inner liner tube is provided with an anti-buckling sleeve, two ends of the anti-buckling sleeve are screwed with adjusting nuts, the adjusting nuts abut against the inner wall of the inner liner tube, the end face of the anti-buckling sleeve is lower than or flush with the outer surface of the inner liner tube, and the fastening bolt passes through the anti-buckling sleeve.

[0018] By adopting the above technical scheme, the anti-buckling sleeve can be accurately aligned with the bolt hole of the inner liner tube and the main pipe and the outer sleeve, and the bolt can pass through conveniently. In addition, the adjusting nut can provide constraint to prevent the inner liner tube from deforming inward, thereby improving the extrusion friction force between the inner liner tube wall and the main pipe wall.

[0019] Optionally, the bolt hole of the inner liner tube is a threaded hole, the axial two ends of the inner liner tube are provided with long slot holes, the long slot holes are distributed in multiple along the circumferential direction of the inner liner tube, and the long slot holes separate the end of the inner liner tube into multiple unit pieces along the circumferential direction.

[0020] By adopting the technical scheme, when the fastening bolt is screwed into the bolt hole on the inner liner pipe, the inner liner pipe side wall and the outer sleeve pipe jointly extrude the main pipe, under the action of the screw rod pulling force, the inner liner pipe wall has a tendency to bend and deform to the outside, the deformation to the outside generates a reverse pulling force pointing to the inside of the pipe, which reduces the extrusion force of the inner liner pipe on the main pipe, thereby reducing the extrusion friction force of the outer sleeve pipe and the inner liner pipe on the main pipe, so that when the inner liner pipe side wall is provided with internal threads, the long slotted hole on the inner liner pipe side wall is beneficial to reducing the reverse pulling force generated by the deformation of the inner liner pipe wall to the outside, so that the unit piece is more easily driven by the fastening bolt to extrude the main pipe, thereby further improving the friction force of the connection and the load bearing capacity of the component connection.

[0021] Optionally, one end of the inner liner pipe is provided with a limiting hole extending from the end to the middle of the inner liner pipe.

[0022] By adopting the technical scheme, when the connection is used for the middle section of the main pipe, i.e., the main pipe is not continuous at the connection, the outer sleeve pipe is first sleeved on the main pipe, when reaching the designed position, one bolt is screwed into the outer sleeve pipe and the inner liner pipe. The diameter of the limiting hole is greater than the diameter of the fastening bolt, the function of the fastening bolt is that when the inner liner pipe is inserted into the main pipe, the first inserted fastening bolt can limit the sliding of the inner liner pipe in the main pipe, so that the bolt hole on the inner liner pipe is accurately aligned with the bolt hole on the main pipe, and the remaining fastening bolts are screwed into the inner liner pipe after the inner liner pipe is in place.

[0023] Optionally, the inner side of the inner liner pipe is provided with an anti-buckling sleeve, the two ends of the anti-buckling sleeve abut against the opposite two inner side walls of the inner liner pipe, and are aligned with the bolt holes on the inner liner pipe, and the anti-buckling sleeve is provided with an entrance corresponding to the limiting hole on one side.

[0024] By adopting the technical scheme, the anti-buckling sleeve is used to resist the bending deformation of the inner liner pipe side wall under the action of the bolt axial force.

[0025] The second technical purpose of the present application is to provide a photovoltaic support adopting the following technical scheme: a small pipe section component connection structure is included.

[0026] The third technical purpose of the present application is to provide a connection method of the small pipe section component connection structure, when the inner liner pipe is located at the end of the main pipe, the connection method includes the following connection steps:

[0027] (1) first put the inner liner pipe into the main pipe, so that the bolt hole on the inner liner pipe is aligned with the bolt hole on the main pipe;

[0028] (2) extend the end of the main pipe into the outer sleeve pipe, so that the bolt hole on the main pipe is aligned with the bolt hole on the outer sleeve pipe;

[0029] (3) screw the fastening bolt into the bolt hole to complete the connection.

[0030] The third technical purpose of the present application is to provide a connecting method of a small pipe cross member connecting structure, when the inner lining pipe is located in the middle part of the main pipe,

[0031] (1) first, the outer sleeve pipe is sleeved on the main pipe, and then a fastening bolt is screwed in;

[0032] (2) the inner lining pipe with the limiting hole is inserted into the main pipe, so that the long slot hole is clamped into the fastening bolt which has been screwed on the main pipe, and then the fastening bolt is tightened;

[0033] (3) the other fastening bolts are screwed into the other corresponding bolt holes.

[0034] In summary, the present application has the following beneficial effects:

[0035] 1. The photovoltaic support structure formed by the fiber reinforced composite material and the metal material combines the two characteristics of the metal material and the glass steel material, and can enhance the strength of the node structure of the photovoltaic support compared with the prior art;

[0036] 2. The connecting structure adopts multiple components including the main pipe, the inner lining pipe and the outer sleeve pipe, the installation process is convenient and fast, and the connecting structure can be installed at multiple positions such as the end part and the middle part of the main pipe, and has wide adaptability. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 It is a cross-sectional structure schematic view of the connecting structure of the present application located at the end part of the main pipe.

[0038] Figure 2 It is a structure schematic view of the inner lining pipe with bolt holes of the present application.

[0039] Figure 3 It is a structure schematic view of the inner lining sleeve with the anti-buckling sleeve of the present application.

[0040] Figure 4 It is a structure schematic view of the inner lining sleeve with the guide groove of the present application.

[0041] Figure 5 It is a structure schematic view of the inner lining sleeve with the anti-buckling sleeve of the present application, and the adjusting nut is arranged at the two ends of the anti-buckling sleeve.

[0042] Figure 6 It is a structure schematic view of the inner lining sleeve with the long slot hole of the present application.

[0043] Figure 7 It is a cross-sectional structure schematic view of the connecting structure of the present application located in the middle part of the main pipe.

[0044] Figure 8 It is a structure schematic view of the inner lining sleeve with the limiting hole of the present application.

[0045] Explanation of reference signs:

[0046] 1. Main tube; 2. Inner liner tube; 3. Outer sleeve; 4. Fastening bolt; 5. Bolt hole; 6. Fastening nut; 7. Anti-bending sleeve; 8. Long slot hole; 9. Unit piece; 10. Limiting hole; 11. Inlet; 12. Alignment piece; 13. Guide groove; 14. Adjusting nut. Detailed Implementation

[0047] The following is in conjunction with the appendix Figures 1-8 This application will be described in further detail.

[0048] like Figure 1 As shown, this application discloses a small-section pipe component connection structure, including a main pipe 1, an inner liner pipe 2, and an outer sleeve pipe 3, as well as fastening bolts 4 that fix the three together. This connection structure can be installed on a photovoltaic support to enhance the node strength of the photovoltaic support.

[0049] like Figure 1 As shown, the main pipe 1 is the main tube constituting the photovoltaic support structure, while the inner liner 2 is located inside the main pipe 1 and fits against its inner wall. The outer liner 3 is located outside the main pipe 1 and can be used to connect the various main pipes 1. The main pipe, outer liner, and inner liner all have closed circular or rectangular cross-sections, as shown in the figure. The main pipe 1 can be made of fiber-reinforced composite material or other materials, while the inner liner 2 and outer liner 3 can be made of metal materials such as iron and steel or other materials. The main pipe 1, inner liner 2, and outer liner 3 are all provided with corresponding bolt holes 5, and the inner liner 2 has bolt holes 5 at at least at both ends.

[0050] like Figure 1 , 2 As shown, in one embodiment, the connection structure is located at the end of the main tube 1, and the fastening bolt 4 passes through the bolt holes 5 on the outer sleeve 3, the main tube 1 and the inner liner 2 and is connected to the fastening nut 6, thereby fixing the three together.

[0051] This configuration creates a compressive force on the outer sleeve 3 as the bolt head of the fastening bolt 4 and the fastening nut 6 move closer together. This causes the two side walls of the outer sleeve 3 to deform inward, thus compressing the outer side wall of the main pipe 1. Consequently, the main pipe 1 tends to deform inward. This inward deformation is blocked by the inner liner 2, which is located inside the main pipe, resulting in a compressive force exerted by the inner liner 2 on the inner side wall of the main pipe 1. In this way, the outer sleeve 3 and the inner liner 2 together provide compressive force to the side wall of the main pipe 1. When the main pipe is subjected to axial force, the compressive force provides anti-slip friction, thereby forming a frictional force transmission in front of the bolt hole. Combined with the pressure transmission force from the hole wall, the two together provide the connection bearing capacity, thereby reducing the pressure on the hole wall, protecting the hole wall from pressure failure, and thus improving the connection bearing capacity of the entire connection structure. Therefore, compared with the prior art, this connection structure can enhance the node connection strength of the photovoltaic bracket.

[0052] like Figure 3 As shown, in one embodiment, the inner liner tube 2 is provided with an anti-buckling sleeve 7. The two ends of the anti-buckling sleeve 7 abut against the two opposite inner sidewalls of the inner liner tube 2 and are aligned with the bolt holes 5 on the inner liner tube 2. The anti-buckling sleeve 7 is used to resist the bending deformation of the sidewall of the inner liner tube 2 under the action of the bolt axial force, thereby enabling the inner liner tube 2 to provide the main tube 1 with stronger support force against inward deformation. The greater support force provides greater anti-slip friction force. Therefore, the setting of the anti-buckling sleeve improves the anti-slip bearing capacity of the joint.

[0053] To facilitate alignment of the buckling-resistance sleeve 7 with the bolt holes 5 on the inner liner tube 2 during processing, the buckling-resistance sleeve 7 is connected to an alignment piece 12. The alignment piece 12 can be a single piece or two pieces arranged side-by-side, through which the buckling-resistance sleeve 7 passes and connects to the alignment piece 12. The length of the alignment piece 12 is the same as the length of the inner liner tube 2. After the alignment piece 12, along with the buckling-resistance sleeve 7, is placed into the inner liner tube 2, both ends of the alignment piece 12 are flush with both ends of the inner liner tube 2, thus facilitating alignment of the buckling-resistance sleeve 7 with the bolt holes 5 on the inner liner tube 2.

[0054] like Figure 4 As shown, in another embodiment, a guide groove 13 is provided on the inner wall of the inner liner tube 2. The guide groove 13 extends inward from the edge of the inner liner tube 2, and the end of the anti-bending sleeve 7 is located within the guide groove 13. The guide groove 13 can be provided on both inner walls of the inner liner tube 2 or on one side.

[0055] Due to the presence of the guide groove 13, the buckling-resistant sleeve 7 can be guided by the guide groove 13 during the processing. The buckling-resistant sleeve 7 is fed from the end of the inner liner tube 2 along the guide groove 13. When the buckling-resistant sleeve 7 is moved to the end of the guide groove 13, the buckling-resistant sleeve 7 can be aligned with the bolt hole 5 on the inner liner tube 2, which facilitates the precise alignment and assembly of the buckling-resistant sleeve 7.

[0056] like Figure 5 As shown, in one embodiment, a limiting hole 10 is provided at the end of the inner liner tube 2. The limiting hole 10 extends from the end of the inner liner tube 2 toward the middle, and the end of the limiting hole 10 corresponds to the bolt hole on the main tube 1. An anti-bending sleeve 7 is provided inside the limiting hole 10. The end face of the anti-bending sleeve 7 is lower than or flush with the outer surface of the inner liner tube 2. Threads are formed on the outer surfaces of both ends of the anti-bending sleeve 7, and adjusting nuts 14 are screwed to both ends of the anti-bending sleeve 7. The adjusting nuts 14 are tightly abutted against the inner wall of the inner liner tube 2.

[0057] In the process of installing the buckling-restrained sleeve 7, the limiting hole 10 can guide it, and when the buckling-restrained sleeve 7 moves to the end of the guide hole, the end of the buckling-restrained sleeve 7 corresponds to the bolt hole on the main pipe 1. By adjusting the nut 14 to be tightly attached to the inner wall of the inner liner pipe 2, since the end face of the buckling-restrained sleeve 7 is not higher than the outer surface of the inner liner pipe 2, there is still extrusion force between the outer surface of the inner liner pipe 2 and the inner wall of the main pipe 1, and the adjusting nut 14 on the buckling-restrained sleeve 7 can transmit the extrusion force of the inner liner pipe side wall to the buckling-restrained sleeve 7, thereby resisting the bending deformation of the inner liner pipe 2 side wall under the action of the bolt axial force, and further enabling the inner liner pipe 2 to provide stronger support force to the main pipe 1 to resist inward deformation.

[0058] As shown in Figure 5 The structure is arranged in a manner that, on the one hand, facilitates the precise alignment and assembly of the buckling-restrained sleeve and the inner liner pipe, facilitates the connection of the bolts of the main pipe and the outer sleeve, and at the same time ensures that there is sufficient contact area between the side wall of the inner liner pipe and the main pipe, thereby ensuring that sufficient resistance friction can be generated when subjected to tension.

[0059] As shown in Figure 6 In an embodiment, the bolt hole 5 of the inner liner pipe 2 is a threaded hole, and long slot holes 8 are arranged at the axial ends of the inner liner pipe 2, the long slot holes 8 are distributed in the circumferential direction of the inner liner pipe 2, and the long slot holes 8 divide the end of the inner liner pipe 2 into a plurality of unit pieces 9 in the circumferential direction. For example, in the embodiment, the outer sleeve 3, the main pipe 1 and the inner liner pipe 2 are all square tubes, and the long slot holes 8 are arranged at the four corners of the two ends of the inner liner pipe 2, that is, the long slot holes 8 divide the two ends of the inner liner pipe 2 into four unit pieces 9.

[0060] By such an arrangement, when the fastening bolt 4 is screwed into the bolt hole 5 on the inner liner pipe 2, under the action of the axial tension of the bolt 4, the side wall of the inner liner pipe 2 and the outer sleeve 3 jointly extrude the main pipe 1. At the same time, due to the tension of the bolt, the wall of the inner liner pipe 2 tends to deform outwardly, and the deformation outwardly generates a reverse tension directed inwardly, which reduces the extrusion force of the inner liner pipe 2 on the main pipe 1, thereby reducing the extrusion friction of the outer sleeve 3 and the inner liner pipe 2 on the main pipe 1. Thus, when the side wall of the inner liner pipe 2 is provided with internal threads, the long slot holes 8 provided in the side wall of the inner liner pipe 2 are beneficial to reducing the reverse tension generated when the wall of the inner liner pipe 2 deforms outwardly, thereby making the unit pieces 9 more easily driven by the fastening bolt 4 to extrude the main pipe 1, thereby further improving the friction bearing capacity of the connection structure, and further improving the connection bearing capacity of the component.

[0061] The application also discloses a connection method of a small pipe cross-section component connection structure, when the inner liner pipe 2 is located at the end of the main pipe 1, the connection method comprises the following connection steps:

[0062] (1) first put the inner liner pipe 2 into the main pipe 1, so that the bolt hole 5 on the inner liner pipe 2 is aligned with the bolt hole 5 on the main pipe 1;

[0063] (2) the end of the main pipe 1 is inserted into the outer sleeve 3, and the bolt hole 5 on the main pipe 1 is aligned with the bolt hole 5 on the outer sleeve 3;

[0064] (3) the fastening bolt 4 is screwed into the bolt hole 5, and the connection is completed.

[0065] As shown in Figure 7 , 8 , in an embodiment, when the connection structure is arranged at the middle part of the main pipe 1, one end of the inner liner pipe 2 is provided with a limiting hole 10 extending from the end to the middle part of the inner liner pipe 2. The inner liner pipe 2 is provided with an anti-buckling sleeve 7 at the inner side, the two ends of the anti-buckling sleeve 7 abut against the opposite two inner side walls of the inner liner pipe 2, and the anti-buckling sleeve 7 is aligned with the bolt hole 5 on the inner liner pipe 2. An entrance 11 corresponding to the limiting hole 10 is formed on one side of the anti-buckling sleeve 7. The sizes of the limiting hole 10 and the entrance 11 allow the fastening bolt 4 to enter.

[0066] In this way, the limiting hole 10 is arranged to facilitate the installation of the connection structure. Specifically, the outer sleeve 3 is sleeved on the main pipe 1, and when reaching the designed position, one fastening bolt is screwed into the outer sleeve 3 and the inner liner pipe 2. The function of the fastening bolt 4 is to limit the sliding of the inner liner pipe 2 in the main pipe 1 when the inner liner pipe 2 is inserted into the main pipe 1, so that the bolt hole 5 on the inner liner pipe 2 is accurately aligned with the bolt hole 5 on the main pipe 1. After the inner liner pipe 2 is in place, the remaining fastening bolts 4 are screwed in. The anti-buckling sleeve 7 is also arranged to resist the bending deformation of the side wall of the inner liner pipe 2 under the action of the bolt axial force.

[0067] The application also discloses a connection method of a small pipe cross-section component connection structure, which comprises the following connection steps:

[0068] (1) the outer sleeve 3 is first sleeved on the main pipe 1, and then one fastening bolt 4 is screwed in;

[0069] (2) the side of the inner liner pipe 2 with the limiting hole 10 is inserted into the main pipe 1, so that the long slot hole 8 is clamped into the fastening bolt 4 already screwed on the main pipe 1, and then the fastening bolt 4 is tightened;

[0070] (3) the other fastening bolts 4 are inserted into the other corresponding bolt holes 5 and are tightened.

[0071] The embodiments of the specific embodiment are the preferred embodiments of the application, and do not limit the protection scope of the application. Therefore, any equivalent changes made according to the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. A connection structure for small-section pipe components, characterized in that: include Including the supervisor (1), The inner liner tube (2) is disposed inside the main tube (1) and fits against the inner wall of the main tube (1); Outer tube (3) is fitted over the outside of the main tube (1); The main tube (1), the inner liner tube (2) and the outer sleeve tube (3) are all provided with corresponding bolt holes (5); Fastening bolts (4) are used to fasten the three parts by passing through bolt holes (5) in the outer sleeve (3), main tube (1) and inner liner (2); The inner liner (2) and outer sleeve (3) exert a compressive friction force on the side wall of the main tube (1) through the pre-force of the fastening bolts (4); The bolt holes (5) of the inner liner (2) are threaded holes. The inner liner (2) has long slot holes (8) at both ends of the axial direction. Multiple long slot holes (8) are distributed along the circumference of the inner liner (2). The long slot holes (8) divide the end of the inner liner (2) into multiple unit pieces (9) along the circumference. The main tube (1) is made of fiber-reinforced composite material, while the inner liner tube (2) and outer liner tube (3) are made of metal.

2. The connection structure for small tube cross-section components according to claim 1, characterized in that: The inner lining tube (2) is provided with an anti-bending sleeve (7) on its inner side. The two ends of the anti-bending sleeve (7) abut against the two opposite inner side walls of the inner lining tube (2) and are aligned with the bolt holes (5) on the inner lining tube (2).

3. The connection structure for small-section tube components according to claim 2, characterized in that: The inner liner tube (2) is connected to an alignment piece (12), the two ends of which are flush with the two ends of the inner liner tube (2), and the anti-bending sleeve (7) passes through and is connected to the alignment piece (12).

4. The connection structure for small-section tube components according to claim 2, characterized in that: The inner wall of the inner liner tube (2) is provided with a guide groove (13), which extends inward from the edge of the inner liner tube (2), and the end of the anti-bending sleeve (7) is located in the guide groove (13).

5. A photovoltaic support structure, characterized in that: It has a small tube cross-section member connection structure as described in any one of claims 1-4.

6. A connection method for a small-section tube component connection structure according to any one of claims 1-4, characterized in that: When the inner liner (2) is located at the end of the main pipe (1), the following connection steps are included: (1) First, insert the inner liner (2) into the main pipe (1) so that the bolt holes (5) on the inner liner (2) are aligned with the bolt holes (5) on the main pipe (1); (2) Insert the end of the main tube (1) into the outer tube (3) and align the bolt holes (5) on the main tube (1) with the bolt holes (5) on the outer tube (3); (3) Screw the fastening bolt (4) into the bolt hole (5) to complete the connection.

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