Round tube connecting piece for photovoltaic support

Abstract

The utility model provides a round tube connecting piece for a photovoltaic support, which comprises a shell, two ends of the shell are used for inserting round tubes, the shell is also provided with a round hole, and a bolt is arranged on the round hole in a penetrating manner; the inner clamping piece comprises a first clamping piece and a second clamping piece, a screw hole is formed in the first clamping piece, the bolt penetrates through the screw hole, the tail end of the bolt abuts against the second clamping piece, and when the inner clamping piece is arranged on the inner side of the round pipe, the first clamping piece and the second clamping piece are clamped. The first clamping piece and the second clamping piece are far away from each other by rotating the bolt, and the first clamping piece and the second clamping piece are clamped on the inner side of the round pipe. According to the circular pipe connecting piece, the outer side of the circular pipe is wrapped by the shell, the inner side of the circular pipe is supported by the inner clamping piece, the diameter of the outer contour of the inner clamping piece can be adjusted through the bolt, the circular pipe connecting piece can adapt to various circular pipes with the same outer diameter and different inner diameters, and the shape of the section of the circular pipe cannot be damaged.

Description

Technical Field

[0001] The utility model relates to the field of photovoltaic brackets, and particularly relates to a round tube connector for a photovoltaic bracket. Background Art

[0002] In the field of photovoltaic brackets, round tubes can be used for crossbeams or columns. Especially in some specific application scenarios and designs, using round tubes has many advantages, such as being convenient for production and manufacturing to reduce costs, being convenient for stockpiling, and not requiring special profile production equipment. When it is necessary to extend and splice in the axial direction of the round tube during use, a connector is needed to connect the two sections of the round tube.

[0003] Currently, the commonly used round tube connectors mostly adopt hoop-type round tube connectors, which are connected by clamping the outer side of the round tube. A connector with a cross-shaped cross-section is inserted inside the round tube. However, during use, due to different regions having different standards for the materials of photovoltaic brackets, there are cases where the outer diameters of the round tubes are the same but their inner diameters are different. During production, multiple types of round tube connectors need to be matched, which will increase the production and manufacturing as well as stockpiling costs. Moreover, the connector with a cross-shaped cross-section inserted inside the round tube easily causes the diameter of the round tube to expand or deform, and repeated disassembly and assembly will easily affect its overall structural strength. Summary of the Invention

[0004] The utility model provides a round tube connector for a photovoltaic bracket, which can effectively solve the above problems.

[0005] The utility model is implemented as follows:

[0006] A round tube connector for a photovoltaic bracket includes:

[0007] A housing, the two ends of the housing are used for inserting round tubes, and a circular hole is provided on the housing, and a bolt is passed through the circular hole.

[0008] An inner clamping member, the inner clamping member includes a first card and a second card. A screw hole is provided on the first card, the bolt passes through the screw hole, and the end of the bolt abuts against the second card. When the inner clamping member is placed inside the round tubes at both ends, by rotating the bolt, the first card and the second card move away from each other, and then the first card and the second card are clamped tightly inside the round tubes at both ends.

[0009] Both the first card and the second card include contact parts symmetrically arranged on their left and right sides, and a card body located between the two side contact parts. An included angle is formed between the contact part and the card body.

[0010] As a further improvement, the housing is integrally in a round tube shape and has a notch on the side, and the cross-section of the housing is in a C shape.

[0011] As a further improvement, the angle of the notch is α, where 10° ≤ α ≤ 125°.

[0012] As a further improvement, the contact part forms an included angle β with the card body, where 30° ≤ β ≤ 70°.

[0013] As a further improvement, a diagonal rod and a connection hole are respectively provided at both ends of the card body. The diagonal rod inclines away from the contact part, and the diagonal rod and the connection hole on the first card cooperate with the connection hole and the diagonal rod on the second card respectively.

[0014] As a further improvement, a nut is also provided on the bolt, and the nut is located outside the outer shell.

[0015] The beneficial effects of the present utility model are as follows:

[0016] The circular tube connector provided by the present utility model wraps the outer side of the circular tube and forms a support inside through the arrangement of the outer shell and the inner clamping part. Among them, the outer contour diameter of the inner clamping part can be adjusted by bolts, which can adapt to a variety of circular tubes with the same outer diameter but different inner diameters, reducing the dependence on specific specifications, that is, there is no need to design circular tube connectors separately for each specification, greatly reducing the possibility of errors caused by specification mismatches. The unified connector design simplifies inventory management, reduces production and warehousing costs, improves operation efficiency at the same time, and does not require processing of the circular tube connection ends.

[0017] Compared with the existing connector with a fixed specification inserted into the inner side of the circular tube, the existing one will expand or deform the diameter of the circular tube after being inserted into the inner side of the circular tube, while the inner clamping part provided by the present utility model will not damage the cross-sectional shape of the circular tube during normal installation. Usually, when installing a photovoltaic bracket, due to factors such as incorrect adjustment of the angle or height, it is necessary to disassemble and readjust its connector, while the circular tube connector provided by the present utility model can support repeated disassembly and assembly, and its structural strength is not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a perspective view provided by an embodiment of the present utility model.

[0020] Figure 2 It is a schematic diagram of the internal clamping part structure provided by the embodiment of the present utility model.

[0021] Figure 3 It is a schematic diagram of the internal structure provided by the embodiment of the present utility model.

[0022] Figure 4 It is a schematic diagram of the outer shell structure provided by the embodiment of the present utility model.

[0023] Figure 5 It is a schematic diagram of the connecting piece structure provided by the embodiment of the present utility model.

[0024] Figure 6 It is a schematic diagram of the installation steps provided by the embodiment of the present utility model.

[0025] Reference numerals:

[0026] 1. Outer shell; 11. Notch;

[0027] 2. Internal clamping part; 21. First card; 211. Contact part; 212. Card body; 213. Diagonal rod; 214. Connecting hole; 215. Screw hole; 22. Second card;

[0028] 3. Bolt; 4. Nut. Detailed implementation manners

[0029] To make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model. Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model.

[0030] In the description of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.

[0031] Refer to Figures 1 to 6As shown, a round tube connector for a photovoltaic bracket includes: an outer shell 1, both ends of the outer shell 1 are used to plug into the round tube, the inner side of the outer shell 1 fits with the outer side of the round tube, the outer shell 1 is in the shape of a round tube as a whole, and its inner diameter is slightly smaller than the outer diameter of the round tube, so that the connection between the outer shell 1 and the round tube is tighter, the connection strength is improved and it is not easy to loosen, and a round hole is also provided on the outer shell 1, and a bolt 3 is passed through the round hole, and the bolt 3 is used to adjust the fixation of the inner clamp 2.

[0032] The inner clamp 2 includes a first card 21 and a second card 22. The first card 21 is provided with a screw hole 215. The bolt 3 passes through the screw hole 215, and the end of the bolt 3 abuts against the second card 22. When the inner clamp 2 is placed on the inner side of the round tube at both ends, the first card 21 and the second card 22 are moved away from each other by rotating the bolt 3, so that the first card 21 and the second card 22 are clamped on the inner side of the round tube at both ends. The inner clamp 2 can be provided with a rough texture or thorn-like protrusions on the contact surface with the inner side of the round tube.

[0033] The first card 21 and the second card 22 both include contact portions 211 symmetrically arranged on the left and right sides thereof, and a card body 212 located between the contact portions 211 on both sides, wherein the contact portions 211 and the card body 212 form an angle, and two contact portions 211 are respectively arranged on two connecting plates, and when abutting against the inner side of the circular tube, there are four abutting points distributed on the inner side of the circular tube, and the supporting force of the inner clamping part 2 on the inner side of the circular tube expands outward, and the cross-sectional shape of the circular tube is not easy to deform when used with the outer shell 1, and can be repeatedly disassembled and assembled, and the structure of the circular tube is intact, and there is no need to cut or shape the circular tube, and the efficiency of installation can be improved while ensuring the connection strength of the structure, and the contact surface between the end of the contact portion 211 and the inner side of the circular tube can also be set to an arc surface, and when the contact portion 211 abuts against the inner side of the circular tube, there can be a larger contact area, the friction between the two is greater, and the structural strength is higher.

[0034] Furthermore, a notch 11 is provided on the side of the shell 1, so that the cross-section of the shell 1 is C-shaped. When installing the shell 1, due to its elastic deformation characteristics, it is opened to both sides from the notch 11 to expand the inner diameter and then put on the round tube. This makes it easier to install the shell 1. When considering the structural strength in the design of the photovoltaic support system, the structural strength of the shell 1 can be increased or decreased in thickness according to actual conditions to meet the structural strength requirements. The notch 11 on the shell 1 can also facilitate observation of the internal situation. In mass production, the shell 1 is formed by sheet metal, and the notch 11 can also facilitate material removal.

[0035] Furthermore, a nut 4 is provided on the bolt 3, and the nut 4 is located on the outside of the shell 1. When the bolt 3 is tightened to clamp the first card 21 and the second card 22 on the inner side of the round tube, the nut 4 is rotated toward the shell 1. After tightening the nut 4, the bolt 3 can be prevented from loosening, ensuring that the first card 21 and the second card 22 are clamped on the inner side of the round tube.

[0036] Furthermore, the angle of the notch 11 is α, where 10°≤α≤125°. When α<10°, the notch 11 on the outer shell 1 is relatively small during installation, which is not conducive to expanding its inner diameter by prying it open at the notch 11. The relatively small notch 11 is not convenient for observing the internal situation, and more materials are required. When α>125°, the opening angle is too large, and its structural strength is greatly reduced under the conditions of the same thickness and the same material, which is not conducive to the stability of the structure. In this embodiment, α=120° is preferred, and its structural strength can meet the use requirements and the thickness is moderate. Technical personnel in this field can calculate through a limited number of finite element force analyses that the opening angle is convenient for installation, and the notch 11 has a larger visible area to the inside, which can better observe the inside and the position and structure of the internal connector 2.

[0037] Furthermore, the contact portion 211 forms an angle β with the card body 212, wherein 30°≤β≤70°. When the contact portion 211 abuts against the inner side of the circular tube, the force direction at the connection between the contact portion 211 and the card body 212 can be divided into two directions: parallel to the surface of the card body 212 and perpendicular to the card body 212. When β<30°, the abutment positions of the four contact portions 211 with the inner side of the circular tube are distributed on both sides of the horizontal central axis, resulting in uneven force. When β>70°, the abutment positions of the four contact portions 211 with the inner side of the circular tube are distributed on both sides of the vertical central axis, resulting in uneven force. In this embodiment, β=45° is preferred, and the abutment positions of the four contact portions 211 with the inner side of the circular tube can be distributed close to equal spacing, and the force split into two directions at the connection between the contact portion 211 and the card body 212 is close in magnitude. From the perspective of the overall structure, its force strength is higher, it is not easy to deform, and the thickness of the connecting piece is more appropriate.

[0038] Further, one end of the card body 212 is respectively provided with an inclined rod 213 and a connection hole 214. The inclined rod 213 inclines away from the contact part 211, that is, inclines towards the other connecting piece. The inclined rod 213 and the connection hole 214 on the first card 21 cooperate with the connection hole 214 and the inclined rod 213 on the second card 22 respectively. One side of the inclined rod 213 in one connecting piece abuts against the connection hole 214 in the other connecting piece. When the rotary bolt 3 makes the first card 21 and the second card 22 move away from each other, since the end of the bolt 3 abuts against the second card 22, the degree of freedom of the second card 22 in the radial direction of the circular tube is not restricted, and the second card 22 is prone to displacement during the installation process. After adding the inclined rod 213 and the connection hole 214, it can prevent the first card 21 and the second card 22 from separating from each other during the process of tightly pressing against the inner wall of the circular tube, which is convenient for installation and does not require auxiliary fixation of the outside of the second card 22 during the fastening process. Among them, the inclination angle of the inclined rod 213 gradually becomes larger due to the force during the process of the first card 21 and the second card 22 moving away from each other; during the production and manufacturing process, by setting the inclined rod 213 with a smaller inclination angle, when assembling the whole set of parts, the first card 21 and the second card 22 can be fixedly connected through the engagement between the inclined rod 213 and the connection hole 214, which is convenient for handling and transportation.

[0039] Compared with the second card 22, the first card 21 has one more screw hole 215. During production and manufacturing, their processes are the same. Only some of the second connectors need to be drilled and tapped, and there is no need to set up an additional production process for an entire set of parts, which can save the production and manufacturing cost of the parts.

[0040] Installation and connection steps:

[0041] Place a circular tube, place the inner engaging part 2 inside the circular tube, then put the outer shell 1 on the outside of the circular tube, adjust the positions of the inner engaging part 2 and the outer shell 1, put the nut 4 on the bolt, and then insert the bolt 3 to relatively fix the positions of the inner engaging part 2 and the outer shell 1 without separation. Then insert the second circular tube, tighten the bolt 3, and finally tighten the nut 4 to fix the position of the bolt 3, and the connection is completed.

[0042] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A round tube connector for a photovoltaic support, characterized in that: include: A shell (1), wherein both ends of the shell (1) are used for inserting a round tube, and the shell (1) is also provided with a round hole, through which a bolt (3) is passed; An inner clamping member (2), the inner clamping member (2) comprising a first card (21) and a second card (22), the first card (21) being provided with a screw hole (215), the bolt (3) passing through the screw hole (215), and the end of the bolt (3) abutting against the second card (22), when the inner clamping member (2) is placed on the inner side of the round tube at both ends, the first card (21) and the second card (22) are moved away from each other by rotating the bolt (3), thereby making the first card (21) and the second card (22) clamped on the inner side of the round tube at both ends; The first card (21) and the second card (22) both comprise contact portions (211) symmetrically arranged on the left and right sides thereof, and a card body (212) located between the contact portions (211) on both sides, wherein the contact portions (211) and the card body (212) form an angle.

2. A round tube connector for a photovoltaic support according to claim 1, characterized in that: The outer shell (1) is in the shape of a circular tube as a whole and is provided with a notch (11) on the side surface; the cross section of the outer shell (1) is C-shaped.

3. A round tube connector for a photovoltaic support according to claim 2, characterized in that: The angle of the notch (11) is α, wherein 10°≤α≤125°.

4. A round tube connector for a photovoltaic support according to claim 1, characterized in that: The contact portion (211) and the card body (212) form an angle β, wherein 30°≤β≤70°.

5. A round tube connector for a photovoltaic support according to any one of claims 1 or 4, characterized in that: An inclined rod (213) and a connecting hole (214) are respectively provided at both ends of the card body (212); the inclined rod (213) is inclined in a direction away from the contact portion (211); the inclined rod (213) and the connecting hole (214) on the first card (21) respectively cooperate with the connecting hole (214) and the inclined rod (213) on the second card (22).

6. A round tube connector for a photovoltaic support according to claim 1, characterized in that: The bolt (3) is also provided with a nut (4), and the nut (4) is located outside the housing (1).

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