Octagonal tube main shaft purline fixing structure for photovoltaic support

Abstract

The utility model provides an octagonal tube main shaft purline fixing structure for a photovoltaic support, which comprises an octagonal tube main shaft, an adapter which is positioned on the upper side of the octagonal tube main shaft and is used for mounting a purline, and a connecting assembly which is used for tightly holding and mounting the adapter on the octagonal tube main shaft, the plane section is parallel to the upper plane of the octagonal tube spindle, the transition section extends downwards from the two ends of the plane section and is used for preventing the plane section from being attached to the upper plane of the octagonal tube spindle so as to avoid over-constraint of the octagonal tube spindle, and the inclined plane section extends downwards from the transition section in an inclined mode and is completely attached to the inclined plane of the octagonal tube spindle. Only the inclined surfaces of the adapter seat and the U-shaped bolt and the inclined surfaces of the adapter seat and the lower hoop are attached to the inclined surface of the octagonal tube main shaft, so that the over-constraint phenomenon caused by mutual competition when the inclined surfaces and the planes are attached is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic bracket installation technology, specifically to an octagonal tube main shaft purlin fixing structure for photovoltaic brackets. Background Technology

[0002] Compared to fixed mounting systems, photovoltaic (PV) tracking systems have seen strong growth in recent years, especially in large-scale ground-mounted power plants where their application rate has been increasing year by year. Their core advantage lies in maximizing solar radiation capture by adjusting the angle of the modules in real time, thereby significantly increasing power generation.

[0003] In the market, for applications where the contact area between the purlin and the octagonal tube spindle of the mounting components is small, the method of directly installing the purlin on top of the octagonal tube spindle and then locking it with a connector is avoided. Instead, an adapter is added between the purlin and the octagonal tube spindle. Through the structural design of the adapter, sufficient contact area is ensured between the octagonal tube spindle and the adapter, and between the adapter and the purlin. Then, the adapter and the connector are locked together, thereby improving the overall wind load resistance.

[0004] However, in the existing technology, the contact between the adapter and connector and the octagonal tube spindle is often such that the inclined surface and the upper and lower planes fit together and lock together. Ideally, this can greatly improve the fixing effect of the purlin. However, due to the unavoidable dimensional errors in the production and processing of the adapter, connector and octagonal tube spindle, the contact surface cannot reach the ideal state. In actual installation, only the upper and lower planes will fit together, and the inclined surface will not make contact. This reduces the contact area between the adapter and connector on the octagonal tube spindle, which weakens the overall wind load resistance and has an adverse effect on the stability of the support operation.

[0005] In view of this, the inventors of this case conducted in-depth research on the above-mentioned problems, which led to the creation of this case. Utility Model Content

[0006] The purpose of this utility model is to address the above-mentioned shortcomings by providing an octagonal tube main shaft purlin fixing structure for photovoltaic brackets that can tightly install the purlins onto the main shaft, effectively avoid over-constraining the main shaft, and has strong wind load resistance.

[0007] The solution adopted by this utility model to solve the technical problem is: an octagonal tube main shaft purlin fixing structure for photovoltaic brackets, including an octagonal tube main shaft, an adapter seat located on the upper side of the octagonal tube main shaft for installing purlins, and a connecting assembly for tightly mounting the adapter seat on the octagonal tube main shaft. The lower side of the adapter seat is provided with a trapezoidal clearance groove. The trapezoidal clearance groove includes a planar section parallel to the upper plane of the octagonal tube main shaft, a transition section extending downward from both ends of the planar section to prevent the planar section from fitting with the upper plane of the octagonal tube main shaft, thereby avoiding over-constraint of the octagonal tube main shaft, and an inclined section extending downward from the transition section to completely fit with the inclined surface of the octagonal tube main shaft. The inclined section is bent outward to form a bent piece for increasing the contact area between the adapter seat and the octagonal tube main shaft, thereby improving the wind load resistance of the adapter seat.

[0008] Furthermore, to avoid the design where both the plane and the bevel of the adapter simultaneously mate with the plane and the bevel of the octagonal tube spindle, resulting in insufficient contact area during actual use due to only the plane of the adapter mate mates with the plane of the octagonal tube spindle, a gap of at least 1mm is provided between the plane segment and the upper plane of the octagonal tube spindle to prevent the octagonal tube spindle from being over-constrained due to both the plane segment and the bevel segment mates with the octagonal tube spindle.

[0009] Furthermore, in order to form a clearance groove structure that engages with the octagonal tube spindle, the adapter includes a top plate and wing plates formed by bending downwards from the left and right sides of the top plate. The top plate is provided with two slots for installing connecting components, and the trapezoidal clearance groove is provided on the two wing plates.

[0010] Furthermore, in order to increase the contact area between the adapter and the octagonal tube spindle while avoiding increasing the size of the raw material, the bending piece is a right-angled trapezoidal structure. The bending piece includes a first right-angled side, a second right-angled side, and a hypotenuse connected to the transition section. Before bending, the hypotenuse is coplanar with the lower side of the wing plate to avoid increasing the overall size of the adapter raw material.

[0011] Furthermore, the adapter is installed on the octagonal tube spindle; the connecting component is a U-bolt, which includes a left straight steel, a left oblique steel, a lower flat steel, a right oblique steel and a right straight steel connected in sequence from left to right. The upper ends of the left straight steel and the right straight steel are provided with external threads. After the upper ends of the left straight steel and the right straight steel pass through the adapter, nuts are threaded and installed to hold the U-bolt tightly on the octagonal tube spindle.

[0012] Furthermore, to ensure that only the inclined surfaces of the connecting components and the octagonal tube spindle are in contact, the distance between the left and right straight steel bars is greater than the width of the octagonal tube spindle to ensure that the left and right straight steel bars do not contact the octagonal tube spindle. The left and right inclined steel bars are fully in contact with the inclined surfaces of the octagonal tube spindle so as to fully lock the octagonal tube spindle in cooperation with the inclined surfaces of the adapter. A gap of at least 1 mm is provided between the lower flat steel bar and the octagonal tube spindle.

[0013] Furthermore, to increase the connection strength between the adapter and the purlin, the purlin fixing structure also includes a purlin installed on the adapter. The purlin is in the shape of an inverted "V". The bottom of the purlin is a base plate for installing U-bolts. A reinforcing plate is provided above the base plate. One side of the base plate and the reinforcing plate is provided with a round hole for passing through the left or right straight steel bar, and the other side of the base plate and the reinforcing plate is provided with a strip hole for passing through the right or left straight steel bar.

[0014] Furthermore, in order to install the adapter on the octagonal tube spindle and ensure that the connecting assembly and the octagonal tube spindle only have beveled surfaces in contact, the connecting assembly includes two long bolts and a lower clamp. The two ends of the lower clamp are respectively connected to the two ends of the adapter by the two long bolts. The lower clamp has a trapezoidal portion adapted to the contour of the octagonal tube spindle for clamping the octagonal tube spindle, and mounting portions on both sides of the trapezoidal portion for mounting the long bolts. The trapezoidal portion includes a lower flat section and inclined sections on both sides of the lower flat section. There is a gap of at least 1 mm between the lower flat section and the octagonal tube spindle, and the inclined sections are completely in contact with the beveled surface of the octagonal tube spindle.

[0015] Furthermore, in order to increase the contact area between the lower clamp and the octagonal tube spindle, the longitudinal sections of the trapezoidal part and the mounting part are both inverted V-shaped. The trapezoidal part and the mounting part both include a mounting surface and right-angled bent surfaces located on the left and right sides of the mounting surface. The mounting surface of the mounting part is provided with through holes for long bolts to pass through.

[0016] Furthermore, to improve the connection strength between the purlin and the adapter, the purlin fixing structure also includes a purlin installed on the adapter. The purlin is in the shape of an inverted "V". The bottom of the purlin is a base plate for installing long bolts. A U-shaped reinforcing plate is provided above the base plate. The long bolt passes through the U-shaped reinforcing plate, the purlin, and the lower clamp from top to bottom and is threaded with a nut. The U-shaped reinforcing plate forms a U-shaped groove. The width of the U-shaped groove is adapted to the bolt head diameter of the long bolt to constrain the rotation of the long bolt. One side of the U-shaped reinforcing plate and the purlin is provided with a round hole for passing through the left or right straight steel bar, and the other side of the U-shaped reinforcing plate and the purlin is provided with a strip hole for passing through the right or left straight steel bar.

[0017] Compared with the prior art, this utility model has the following advantages: the inclined surfaces of the adapter and the U-bolt, and the inclined surfaces of the adapter and the lower clamp are always in contact with the inclined surface of the octagonal tube spindle, while the flat surfaces of the adapter and the U-bolt, and the flat surfaces of the adapter and the lower clamp are always not in contact with the flat surface of the octagonal tube spindle. This effectively avoids the over-constraint phenomenon that occurs when both the inclined surfaces and the flat surfaces are in contact. Furthermore, it also prevents the problem of insufficient wind load resistance caused by only the flat surfaces being in contact. In addition, this utility model adds an extra flange at the inclined surface contact point of the adapter. While ensuring that the flange does not increase the size of the raw material for processing the adapter, it increases the contact area between the adapter and the spindle while reducing additional costs, thereby simultaneously improving the overall wind load resistance. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] Figure 1 This is a front view of the structure of Embodiment 1 of this utility model;

[0020] Figure 2 This is a three-dimensional structural view of Embodiment 1 of the present utility model;

[0021] Figure 3 This is a side view of the structure of Embodiment 1 of this utility model;

[0022] Figure 4 This is a front view of the structure of Embodiment 2 of this utility model;

[0023] Figure 5 This is a three-dimensional structural view of Embodiment 2 of the present invention;

[0024] Figure 6 This is a side view of the structure of Embodiment 2 of this utility model.

[0025] In the diagram: 1. Octagonal tube spindle; 2. Adapter seat; 21. Top plate; 22. Wing plate; 22. Flat section; 221. Transition section; 222. Inclined section; 223. Bending piece; 224. First right-angled side; 2241. Second right-angled side; 2242. Inclined side; 2243. U-bolt; 3. Left straight steel; 31. Left inclined steel; 32. Lower flat steel; 33. Right inclined steel; 34. Right straight steel; 35. Purlin; 4. Base plate; 41. Reinforcing plate; 5. Long bolt; 6. Lower clamp; 7. Trapezoidal part; 71. Lower flat section; 711. Inclined section; 712. Mounting part; 72. U-shaped reinforcing plate; 8. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0027] Example 1: As Figure 1-3As shown, this embodiment provides an octagonal tube main shaft purlin fixing structure for photovoltaic brackets, including an octagonal tube main shaft 1, an adapter 2 located on the upper side of the octagonal tube main shaft 1 for mounting purlins 4, and a connecting assembly for clamping the adapter 2 onto the octagonal tube main shaft 1. The lower side of the adapter 2 is provided with a trapezoidal clearance groove. The trapezoidal clearance groove includes a planar section 221 parallel to the upper plane of the octagonal tube main shaft 1, a transition section 222 extending downward from both ends of the planar section 221 to prevent the planar section 221 from fitting against the upper plane of the octagonal tube main shaft 1, thereby avoiding over-constraint of the octagonal tube main shaft 1, and an inclined section 223 extending downward from the transition section 222 to fully fit against the inclined surface of the octagonal tube main shaft 1. The inclined section 223 is bent outward to form a bent piece 224 for increasing the contact area between the adapter 2 and the octagonal tube main shaft 1, thereby improving the wind load resistance of the adapter 2.

[0028] In this embodiment, to avoid the design where the plane and the inclined surface of the adapter 2 simultaneously fit with the plane and the inclined surface of the octagonal tube spindle 1, resulting in insufficient contact area during actual use due to only the plane of the adapter 2 fitting with the plane of the octagonal tube spindle 1, a gap of at least 1 mm is provided between the plane segment 221 and the upper plane of the octagonal tube spindle 1 to prevent the octagonal tube spindle 1 from being over-constrained due to both the plane segment 221 and the inclined surface segment 223 fitting with the octagonal tube spindle 1.

[0029] In this embodiment, in order to form a clearance groove structure that engages with the octagonal tube spindle 1, the adapter 2 includes a top plate 21 and wing plates 22 formed by bending the left and right sides of the top plate 21 downwards respectively. The top plate 21 is provided with two slots for installing connecting components, and the trapezoidal clearance groove is provided on the two wing plates 22.

[0030] In this embodiment, in order to increase the contact area between the adapter 2 and the octagonal tube spindle 1 while avoiding increasing the size of the raw material, the bending piece 224 is a right-angled trapezoidal structure. The bending piece 224 includes a first right-angled side 2241, a second right-angled side 2242 and a hypotenuse 2243 connected to the transition section 222. Before bending, the hypotenuse 2243 is coplanar with the lower side of the wing plate 22 to avoid increasing the overall size of the raw material of the adapter 2.

[0031] In this embodiment, in order to install the adapter 2 on the octagonal tube spindle 1 and ensure that the connecting assembly and the octagonal tube spindle 1 only have their inclined surfaces in contact, the connecting assembly includes two long bolts 6 and a lower clamp 7. The two ends of the lower clamp 7 are respectively connected to the two ends of the adapter 2 by the two long bolts 6. The lower clamp 7 has a trapezoidal portion 71 adapted to the contour of the octagonal tube spindle 1 for clamping the octagonal tube spindle 1 and mounting portions 72 located on both sides of the trapezoidal portion 71 for mounting the long bolts 6. The trapezoidal portion 71 includes a lower flat section 711 and inclined sections 712 located on both sides of the lower flat section 711. There is a gap of at least 1 mm between the lower flat section 711 and the octagonal tube spindle 1, and the inclined sections 712 are completely in contact with the inclined surfaces of the octagonal tube spindle 1.

[0032] In this embodiment, in order to increase the contact area between the lower clamp 7 and the octagonal tube spindle 1, the longitudinal sections of the trapezoidal part 71 and the mounting part 72 are both inverted V-shaped. The trapezoidal part 71 and the mounting part 72 both include a mounting surface and right-angled bending surfaces located on the left and right sides of the mounting surface. The mounting surface of the mounting part 72 is provided with through holes for the long bolt 6 to pass through.

[0033] In this embodiment, to improve the connection strength between the purlin 4 and the adapter 2, the purlin 4 fixing structure also includes a purlin 4 installed on the adapter 2. The purlin 4 is inverted V-shape, and the bottom of the purlin 4 is a base plate 41 for installing the long bolt 6. A U-shaped reinforcing plate 85 is also provided above the base plate 41. The long bolt 6 passes through the U-shaped reinforcing plate 85, the purlin 4 and the lower clamp 7 from top to bottom and is threaded with a nut. The U-shaped reinforcing plate 85 forms a U-shaped groove. The groove width is adapted to the bolt head diameter of the long bolt 6 to constrain the rotation of the long bolt 6. One side of the U-shaped reinforcing plate 85 and the purlin 4 is provided with a round hole for passing through the left straight steel 31 or the right straight steel 35. The other side of the U-shaped reinforcing plate 85 and the purlin 4 is provided with a strip hole for passing through the right straight steel 35 or the left straight steel 31.

[0034] Example 2: As Figure 4-6As shown, the difference between this embodiment and Embodiment 1 lies in the different connecting components. This embodiment provides a fixing structure for an octagonal tube main shaft 1 and purlin 4 for a photovoltaic bracket, including an octagonal tube main shaft 1, an adapter 2 located on the upper side of the octagonal tube main shaft 1 for mounting the purlin 4, and a connecting component for tightly mounting the adapter 2 onto the octagonal tube main shaft 1. The lower side of the adapter 2 is provided with a trapezoidal clearance groove. The trapezoidal clearance groove includes a planar segment 221 parallel to the upper plane of the octagonal tube main shaft 1, a transition segment 222 extending downward from both ends of the planar segment 221 to prevent the planar segment 221 from fitting against the upper plane of the octagonal tube main shaft 1, thereby avoiding over-constraint of the octagonal tube main shaft 1, and an inclined segment 223 extending downward from the transition segment 222 to completely fit against the inclined surface of the octagonal tube main shaft 1. The inclined segment 223 is bent outward to form a bent piece 224 for increasing the contact area between the adapter 2 and the octagonal tube main shaft 1, thereby improving the wind load resistance of the adapter 2.

[0035] In this embodiment, the adapter 2 is installed on the octagonal tube spindle 1; the connecting component is a U-bolt 3, which includes a left straight steel 31, a left oblique steel 32, a lower flat steel 33, a right oblique steel 34 and a right straight steel 35 connected sequentially from left to right. The upper ends of the left straight steel 31 and the right straight steel 35 are provided with external threads. After the upper ends of the left straight steel 31 and the right straight steel 35 pass through the adapter 2, nuts are threaded and installed to hold the U-bolt 3 tightly on the octagonal tube spindle 1.

[0036] In this embodiment, to ensure that only the inclined surfaces of the connecting assembly and the octagonal tube spindle 1 are in contact, the distance between the left straight steel 31 and the right straight steel 35 is greater than the width of the octagonal tube spindle 1 to ensure that the left straight steel 31 and the right straight steel 35 do not contact the octagonal tube spindle 1. The left inclined steel 32 and the right inclined steel 34 are completely in contact with the inclined surfaces of the octagonal tube spindle 1 so as to completely lock the octagonal tube spindle 1 in cooperation with the inclined surfaces of the adapter seat 2. The lower flat steel 33 is provided with a gap of at least 1 mm between it and the octagonal tube spindle 1.

[0037] In this embodiment, in order to increase the connection strength between the adapter 2 and the purlin 4, the purlin 4 fixing structure also includes a purlin 4 installed on the adapter 2. The purlin 4 is in the shape of an inverted "V". The bottom of the purlin 4 is a base plate 41 for installing U-bolts. A reinforcing plate 5 is also provided above the base plate 41. One side of the base plate 41 and the reinforcing plate 5 is provided with a round hole for passing through the left straight steel 31 or the right straight steel 35. The other side of the base plate 41 and the reinforcing plate 5 is provided with a strip hole for passing through the right straight steel 35 or the left straight steel 31.

[0038] In this invention, the inclined surfaces of the adapter 2 and the U-bolt, and the inclined surfaces of the adapter 2 and the lower clamp 7, are necessarily in contact with the inclined surface of the octagonal tube spindle 1. The flat surfaces of the adapter 2 and the U-bolt, and the flat surfaces of the adapter 2 and the lower clamp 7, are necessarily not in contact with the flat surface of the octagonal tube spindle 1. This effectively avoids over-constraint caused by competition between the inclined surfaces and the flat surfaces. Furthermore, it also prevents insufficient wind load resistance due to only flat surface contact. In addition, this invention adds an extra flange at the inclined surface contact point of the adapter 2. While ensuring that the flange does not increase the size of the raw material for processing the adapter 2, it increases the contact area between the adapter 2 and the spindle while reducing additional costs, thereby simultaneously improving the overall wind load resistance.

[0039] The above description is merely an embodiment of this utility model and does not limit the scope of patent protection of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this utility model.

Claims

1. An octagonal tube king post purlin fixing structure for a photovoltaic support, characterized by: The device includes an octagonal tube spindle, an adapter seat located on the upper side of the octagonal tube spindle for mounting purlins, and a connecting assembly for tightly mounting the adapter seat onto the octagonal tube spindle. The lower side of the adapter seat is provided with a trapezoidal clearance groove. The trapezoidal clearance groove includes a planar section parallel to the upper plane of the octagonal tube spindle, a transition section extending downward from both ends of the planar section to prevent the planar section from fitting against the upper plane of the octagonal tube spindle, thereby avoiding over-constraint of the octagonal tube spindle, and an inclined section extending downward from the transition section to completely fit against the inclined surface of the octagonal tube spindle. The inclined section is bent outward to form a bent piece to increase the contact area between the adapter seat and the octagonal tube spindle, thereby improving the wind load resistance of the adapter seat.

2. The octagonal tube king post purlin fixing structure for a photovoltaic support according to claim 1, characterized in that: A gap of at least 1 mm is provided between the planar section and the upper plane of the octagonal tube spindle to prevent the octagonal tube spindle from being over-constrained due to both the planar section and the inclined section being in contact with the octagonal tube spindle.

3. The octagonal tube king post purlin fixing structure for a photovoltaic support according to claim 1, characterized in that: The adapter includes a top plate and wing plates formed by bending downwards from the left and right sides of the top plate. The top plate has two slots for installing connecting components, and the trapezoidal clearance grooves are provided on the two wing plates.

4. The octagonal tube king post purlin fixing structure for a photovoltaic support according to claim 3, characterized in that: The bending piece has a right-angled trapezoidal structure. The bending piece includes a first right-angled side, a second right-angled side, and a hypotenuse connected to the transition section. Before bending, the hypotenuse is coplanar with the lower side of the wing plate to avoid increasing the overall size of the adapter material.

5. The octagonal tube king post purlin fixing structure for a photovoltaic support according to claim 1, characterized in that: The connecting component is a U-bolt, which includes a left straight steel, a left oblique steel, a lower flat steel, a right oblique steel and a right straight steel connected in sequence from left to right. The upper ends of the left straight steel and the right straight steel are provided with external threads. After the upper ends of the left straight steel and the right straight steel pass through the adapter seat, nuts are threaded and installed to hold the U-bolt tightly on the octagonal tube spindle.

6. The octagonal tube king post purlin fixing structure for a photovoltaic support according to claim 5, characterized in that: The distance between the left and right straight steel bars is greater than the width of the octagonal tube spindle to ensure that the left and right straight steel bars do not contact the octagonal tube spindle. The left and right inclined steel bars are fully fitted with the inclined surface of the octagonal tube spindle so as to fully lock the octagonal tube spindle in cooperation with the inclined surface of the adapter seat. There is a gap of at least 1mm between the lower flat steel bar and the octagonal tube spindle.

7. The octagonal tube king post purlin fixing structure for a photovoltaic support according to claim 5, characterized in that: The purlin fixing structure also includes purlins installed on the adapter. The purlins are inverted V-shapes. The bottom of the purlin is a base plate for installing U-bolts. A reinforcing plate is provided above the base plate. One side of the base plate and the reinforcing plate is provided with a round hole for passing through the left or right straight steel bar. The other side of the base plate and the reinforcing plate is provided with a strip hole for passing through the right or left straight steel bar.

8. The octagonal tube king post purlin fixation structure for a photovoltaic support according to claim 1, characterized in that: The connecting assembly includes two long bolts and a lower clamp. The two ends of the lower clamp are respectively connected to the two ends of the adapter seat by two long bolts. The lower clamp has a trapezoidal part adapted to the contour of the octagonal tube spindle for clamping the octagonal tube spindle, and mounting parts on both sides of the trapezoidal part for mounting long bolts. The trapezoidal part includes a lower flat section and inclined sections on both sides of the lower flat section. There is a gap of at least 1 mm between the lower flat section and the octagonal tube spindle. The inclined sections are completely fitted with the inclined surface of the octagonal tube spindle.

9. The octagonal tube king post purlin fixing structure for a photovoltaic support according to claim 8, characterized in that: Both the trapezoidal part and the mounting part have inverted V-shaped longitudinal sections. Both the trapezoidal part and the mounting part include a mounting surface and right-angled bent surfaces located on the left and right sides of the mounting surface. The mounting surface of the mounting part is provided with through holes for long bolts to pass through.

10. The octagonal tube king post purlin fixing structure for a photovoltaic support according to claim 8, characterized in that: The purlin fixing structure also includes a purlin installed on the adapter. The purlin is in the shape of an inverted "V". The bottom of the purlin is a base plate for installing long bolts. A U-shaped reinforcing plate is provided above the base plate. The long bolt passes through the U-shaped reinforcing plate, the purlin and the lower clamp from top to bottom and is threaded with a nut. The U-shaped reinforcing plate forms a U-shaped groove. The width of the U-shaped groove is adapted to the diameter of the bolt head of the long bolt to constrain the rotation of the long bolt. One side of the U-shaped reinforcing plate and the purlin is provided with a round hole for passing through the left or right straight steel bar. The other side of the U-shaped reinforcing plate and the purlin is provided with a strip hole for passing through the right or left straight steel bar.

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