CN113529776A - Three-dimensional position-adjustable photovoltaic module support stand column connection conversion device - Google Patents

Abstract

The invention relates to a photovoltaic component support stand column connecting device with three-dimensional adjustable positions, which comprises a first mounting piece connected to the bottom of a column base and a second mounting piece connected to a pile top, wherein the first mounting piece comprises a top plate and an outer cylinder connected to the top plate, the corresponding positions of the top plate and a column foot plate are provided with elliptical holes with mutually vertical long axis directions, the elliptical holes penetrate through and are fixed through a connecting piece, so that the top plate and the column foot plate can move relatively, the second mounting piece comprises a bottom plate and an inner cylinder connected to the bottom plate, the inner cylinder and the outer cylinder are respectively provided with at least 2 groups of inner cylinder hole groups and outer cylinder hole groups which are distributed up and down, the outer cylinder is sleeved outside the inner cylinder, and the outer cylinder penetrates through 1 group of the outer cylinder hole groups and 1 group of the inner cylinder hole groups to be fixed through a fixing piece, no matter the precast tubular pile end plate screw hole is located optional position, the connecting device can be firmly installed by adopting the bolt.

Description

Three-dimensional position-adjustable photovoltaic module support stand column connection conversion device

Technical Field

The invention relates to a photovoltaic module support connecting device capable of realizing three-dimensional adjustment in the field of new energy photovoltaic power generation.

Background

The prefabricated concrete pipe pile foundation of the photovoltaic cell module support is high in construction speed, good in durability and convenient for lifting the lower edge elevation of the module, and is widely applied to construction of photovoltaic power stations.

During civil engineering construction of the prefabricated concrete pipe pile foundation of the photovoltaic power station assembly, due to the fact that the positioning accuracy is low, the pile top elevation after pile forming, the position deviation inside and outside the axis is large, the installation accuracy of the upper support is easily affected, and inconvenience is brought to photovoltaic assembly installation. And although the prefabricated tubular pile end plate is provided with the bolt hole for pile extension, the position of the threaded hole of the pile end plate in the horizontal plane is random during the construction of the prefabricated tubular pile, and if the bolt hole reserved on the photovoltaic support column foot plate is directly butted with the threaded hole of the pile end plate, the axis azimuth angle of the photovoltaic assembly support cannot be ensured to meet the design requirement.

In actual engineering, a welding mode is mostly adopted during the installation of the photovoltaic module support stand column, a plurality of steel plate mats are used for adjusting the design elevation of the support column foot plate between the support column foot plate and the prefabricated tubular pile end plate, and the steel plate mats move in the axis of the plane of the pile top and out of the axis simultaneously until the design plane of the support column is positioned, and then the on-site welding is carried out. The quality of the field welding condition is difficult to guarantee, and particularly, the high support needs air welding operation, so that the construction difficulty is higher. When the upright post is welded at high temperature, the anti-corrosion zinc coating is damaged, the anti-corrosion durability is short, the workload of on-site anti-corrosion treatment is large, multiple anti-corrosion maintenance is needed during the operation, and the investment and maintenance cost is high. If can realize photovoltaic module support and precast tubular pile on-the-spot bolted connection, will effectively solve the adverse effect that the welding brought.

Disclosure of Invention

The technical problem solved by the invention is to provide the photovoltaic module support stand column connecting device with the three-direction position adjustable, the photovoltaic module support stand column connecting device can be adjusted in the height direction, the longitudinal axis direction and the transverse axis direction, construction errors caused when a pile foundation is formed can be effectively made up, the mounting precision of an upper support is ensured, and the connecting device can be firmly mounted by adopting bolts no matter whether the screw holes of the end plate of the precast tubular pile are positioned at any position.

The technical means adopted by the invention are as follows.

A three-direction position-adjustable photovoltaic assembly bracket upright post connecting device comprises a first mounting piece connected to the bottom of a column base and a second mounting piece connected to a pile top; the first mounting piece comprises a top plate and an outer cylinder connected to the top plate, the top plate is connected to the bottom of a column base, oval holes with long axis directions perpendicular to each other are formed in the corresponding positions of the top plate and the column foot plate, and the oval holes penetrate through and are fixed through a connecting piece, so that the top plate and the column foot plate can generate transverse and longitudinal relative displacement before being fixed relatively; the second mounting part comprises a bottom plate and an inner cylinder connected to the bottom plate, and the bottom plate is fixed to the pile top through a fixing device; the outer barrel is provided with at least 2 groups of outer barrel hole groups distributed up and down, the inner barrel is provided with at least 1 group of inner barrel hole groups distributed up and down, the outer barrel is sleeved outside the inner barrel, and the fixing piece penetrates through 1 group of outer barrel hole groups and 1 group of inner barrel hole groups to fix the first and second installation parts.

Further, 12 outer cylinder holes are arranged on the outer cylinder and form 3 outer cylinder hole groups, 4 first outer cylinder holes uniformly distributed on the same circumference form one group, 4 second outer cylinder holes uniformly distributed on the same circumference form one group, the second outer cylinder holes are offset upwards by a distance n along the axial direction of the outer cylinder relative to the first outer cylinder holes, 4 third outer cylinder holes uniformly distributed on the same circumference form one group, and the third outer cylinder holes are offset downwards by a distance n along the axial direction of the outer cylinder relative to the first outer cylinder holes; the inner cylinder is provided with 12 inner cylinder holes which form 3 groups of inner cylinder holes, 4 first inner cylinder holes uniformly distributed on the same circumference form one group, 4 second inner cylinder holes uniformly distributed on the same circumference form one group, the upward offset distance of the second inner cylinder holes relative to the first inner cylinder holes along the axial direction of the inner cylinder is m, 4 third inner cylinder holes uniformly distributed on the same circumference form one group, and the downward offset distance of the third inner cylinder holes relative to the first inner cylinder holes along the axial direction of the inner cylinder is m; the 12 outer cylinder holes and the 12 inner cylinder holes are uniformly distributed along the circumference of 30 degrees.

Furthermore, a group of inner cylinder holes are added in the upper area of the second inner cylinder hole, the inner cylinder holes are 4 fourth inner cylinder holes which are uniformly distributed on the same circumference, the offset distance of the inner cylinder holes relative to the second inner cylinder hole in the axial direction of the inner cylinder is m, and the positions of the inner cylinder holes and the third inner cylinder holes are vertically corresponding to each other in the axial direction of the inner cylinder.

Furthermore, a group of inner cylinder holes are added in the lower area of the third inner cylinder hole, the inner cylinder holes are 4 fifth inner cylinder holes which are uniformly distributed on the same circumference, the downward offset distance of the fifth inner cylinder holes relative to the third inner cylinder hole is m, and the positions of the fifth inner cylinder holes and the second inner cylinder holes vertically correspond to each other along the inner cylinder shaft.

Furthermore, the allowed installation elevation error of a toe board of the photovoltaic module support stand column is +/-n/2, m =2n, the construction error adjustable range of the compensable pile top elevation is +/-kn, and k is the number of inner cylinder hole groups on the side wall of the inner cylinder and is an odd number group.

Further, the number of groups of inner cylinder holes in the inner cylinder side wall k = 3.

Further, bottom plate 3 is the loop configuration, and this bottom plate is fixed in the pile head plate through a plurality of evenly distributed fixing device on the outer edge of bottom plate, and every fixing device contains briquetting, backing plate and construction bolt, the interior edge of briquetting is pressed on the outer edge of bottom plate, and the inward flange distance inner tube of briquetting is 1~2mm, and the outer edge below of briquetting is equipped with backing plate 6, and this pad plate thickness is unanimous with the bottom plate, predetermine the perforation on the briquetting, construction bolt passes in order pierce through the perforation, penetrate the mounting hole of pile head plate behind the space between bottom plate and the backing plate, compresses tightly fixedly with the bottom plate to the pile head plate, the external diameter size of bottom plate is 1~2mm less than the circle diameter that a plurality of construction bolt enclose, makes the bottom plate can wholly freely rotate the adjustment position before the construction bolt is fixed.

Furthermore, the distance from a second outer cylinder hole on the outer cylinder to the bottom of the outer cylinder is a, the distance from the second outer cylinder hole on the outer cylinder to the top of the outer cylinder is b, the distance from a third inner cylinder hole on the inner cylinder 4 to the bottom of the outer cylinder is c, the distance from the third inner cylinder hole on the inner cylinder 4 to the top of the outer cylinder is d, the thickness of the pressing block is t, c is greater than or equal to a + t, and b is greater than or equal to d.

Further, the length of the long axis of the elliptical hole on the top plate and the column foot plate is 2 times of the allowable error of displacement control during pile forming.

Furthermore, the assembly tolerance between the outer cylinder and the inner cylinder is 0.5-1.5 mm.

The beneficial effects produced by the invention are as follows.

1. The invention relates to a three-way conversion device which can adjust the elevation of a pin plate up and down and adjust the position in the horizontal plane in the transverse and longitudinal directions, thereby ensuring the mounting precision of a photovoltaic module bracket and the mounting precision of an upper photovoltaic module from multiple aspects. Because the position of the threaded hole of the pile end plate in the horizontal plane is random, no matter where the threaded hole of the pile end plate is located in the pile end plane, the photovoltaic module support above can be connected through bolts and can be guaranteed to be in the correct design position through three-way adjustment.

2. The column connection and conversion device of the invention realizes the bolt connection between the photovoltaic support column and the concrete pipe pile, and the device is prefabricated before leaving factory, is directly assembled on the construction site, and is fastened and connected by bolts, and the operations of site welding, pouring maintenance and the like are not needed, thus being convenient for site construction and high in installation speed, being beneficial to aerial installation operation of high supports, effectively reducing construction difficulty and having high safety. In addition, as the connecting position is not welded on the construction site, the original anticorrosive coating structure is prevented from being damaged, and the anticorrosive operation and maintenance work is greatly reduced.

Drawings

Fig. 1 is an overall assembly view of the connection converting apparatus of the present invention.

Fig. 2 is a longitudinal sectional view of the connection converting apparatus of the present invention.

Fig. 3 is a cross-sectional view of section a-a in fig. 2.

Fig. 4 is a top view of a toe portion of the connection converting apparatus of the present invention.

Fig. 5A is a perspective view of a first mount in the connection converting apparatus of the present invention.

Fig. 5B is a top view structural view of the first mounting device in the connection converting apparatus of the present invention.

Fig. 5C is a side view of the first mounting member of the adapter of the present invention.

Fig. 6A is a perspective view of a second mount in the connection converting apparatus of the present invention.

Fig. 6B is a top view structural view of the second mounting device in the connection converting apparatus of the present invention.

Fig. 6C is a side view structural view of the second mounting member in the connection converting apparatus of the present invention.

Fig. 7 is a development view of the outer cylinder structure.

FIG. 8 is an expanded view of the inner barrel structure.

Fig. 9 is a height adjustment matching chart of the first embodiment.

Fig. 10 is a height adjustment matching chart of the second embodiment.

Fig. 11 is a height adjustment matching chart of the third embodiment.

Fig. 12 is a height adjustment matching chart of the fourth embodiment.

Fig. 13 is a height adjustment matching chart of the fifth embodiment.

Fig. 14 is a height adjustment matching chart of the sixth embodiment.

Fig. 15 is a height adjustment matching chart of the seventh embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention; it is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention relates to a photovoltaic module support stand column connecting device with three-dimensional adjustable positions, which connects a stand column base with a pile top, and can be adjusted in three directions according to actual engineering requirements based on a connecting structure.

The connecting device comprises a first mounting member connected to the base of the column shoe and a second mounting member connected to the pile top.

As shown in fig. 1, 2, 4, and 5A to 5C, the first mounting member includes a top plate 1 and an outer cylinder 2 connected to a bottom surface of the top plate 1, 4 elliptical top plate bolt mounting holes 111 are reserved in the top plate 1, the number and the position of the elliptical top plate bolt mounting holes 111 correspond to elliptical stud plate bolt mounting holes 101 reserved in the stud plate 10, and stud bolts 11 pass through the corresponding top plate bolt mounting holes 111 and stud plate bolt mounting holes 101 to connect and fix the top plate 1 and the stud plate 10. When the column foot plate is installed, the long axis direction of the ellipse of the column foot plate installation hole 101 is perpendicular to the long axis direction of the top plate installation hole 111, so that the relative position between the top plate 1 and the column foot plate 10 is adjusted, and after the adjustment, the column foot plate is fixed by penetrating 2 holes through bolts. One hole is responsible for solving the error of the longitudinal axis direction in the plane when the pile foundation is constructed, and the other hole is responsible for solving the error of the transverse axis direction. For example, the top plate mounting hole 111 has the same hole opening direction (i.e., the long axis direction) as the vertical axis for adjusting the error of the pile foundation in the vertical axis direction, while the toe bolt mounting hole 101 has the same hole opening direction (i.e., the long axis direction) as the horizontal axis for adjusting the error of the pile foundation in the horizontal axis direction. In addition, the length of the elliptical hole depends on the allowable error of displacement control during pile forming, and the allowable error can be 2 times that of the elliptical hole.

As shown in fig. 5A and 5B, a hole is left in the middle of the top plate 1 for conveniently mounting the height positioning bolt 7 during the mounting process. The shape of the outer edge of the top plate 1 is preferably a rectangle matching with the toe plate 10, and different shapes can be selected according to actual engineering conditions, and are not limited in detail here.

As shown in fig. 1 to 3 and fig. 6A to 6C, the second mounting member includes a bottom plate 3 and an inner cylinder 4 connected to the top surface of the bottom plate 3, and the bottom plate 3 and a pile end plate 9 of the pile are fixed relative to each other by a mounting bolt 8 and a fixing device. The bottom plate 3 is of an annular structure, and a middle reserved hole is used for draining rainwater. The fixing device can be selected from various types, as shown in the figure, 6 pressing blocks 5 are uniformly arranged on the bottom plate 3, the inner edges of the pressing blocks 5 are pressed on the outer edges of the bottom plate 3, a backing plate 6 is arranged below the outer edges of the pressing blocks 5, the thickness of the backing plate 6 is consistent with that of the bottom plate 3, and a through hole is also preset on each pressing block 5. When the fixing device is used for fixing, the mounting bolt 8 penetrates through the preset through hole and the gap between the bottom plate 3 and the base plate 6 and then penetrates into the pile end plate 9, so that the bottom plate 3 is pressed and fixed onto the pile end plate 9. Wherein the external diameter size of bottom plate 3 is 1~2mm less than the circle diameter that the construction bolt 8 encloses to guarantee that connecting device can whole free rotation adjustment position before the construction bolt 8 is fixed. The thickness of the pressing block 5 is t, and the distance between the inner edge and the outer side of the inner barrel 4 is 1-2 mm.

The height of the invention is adjusted by the matching of the first mounting piece and the second mounting piece. The outer cylinder 2 is sleeved outside the inner cylinder 4, and the outer cylinder 2 and the inner cylinder 4 are provided with matched mounting hole groups which are fastened through mounting height positioning bolts 7. The assembly tolerance between the outer cylinder 2 and the inner cylinder 4 is about 0.5-1.5mm, which can ensure the free lifting and rotation of the device and also ensure the stability of the device after being fastened by the height positioning bolt 7.

Specifically, as shown in fig. 7, 3 sets of outer cylinder hole groups distributed vertically are provided on the outer cylinder 2, and 4 first outer cylinder holes 21 uniformly distributed on the same circumference are set as a set, which is used as a reference position; 4 second outer cylinder holes 22 uniformly distributed on the same circumference form a group, and the group is vertically and upwardly offset by a size n relative to the first outer cylinder holes 21; the 4 third outer cylinder holes 23 uniformly distributed on the same circumference are in a group, the size n is vertically and downwardly deviated relative to the first outer cylinder hole 21, the above totally accounts for 12 circular bolt holes, and the 12 outer cylinder holes are uniformly distributed along a circumference of 30 degrees, namely, the central angle formed by the adjacent outer cylinder holes on the horizontal plane is 30 degrees.

In order to realize connection and fixation, circular bolt holes with the same specification are arranged on the inner cylinder 4, and can be arranged into k groups of inner cylinder holes distributed up and down, wherein k is odd, such as k =1, 3, 5 and the like, and the number of the groups of the holes on the inner cylinder 4 is 3 in the example shown in fig. 8, and the distribution mode is similar to that on the outer cylinder 2. 4 first inner cylinder holes 41 uniformly distributed on the same circumference form a group as a reference position; a group of 4 second inner cylindrical holes 42 uniformly distributed on the same circumference, which are vertically offset upward by a dimension m with respect to the first inner cylindrical holes 41; a group of 4 third inner cylindrical holes 43 evenly distributed on the same circumference, vertically offset downwards by a dimension m with respect to the first holes. The 12 outer cylinder holes are also uniformly distributed along the circumference of 30 degrees.

In actual engineering operation, the installation error cannot be avoided generally, but the installation error can be limited within a controllable range according to the structural characteristics. The photovoltaic module support stand column foot plate corresponding to the invention allows the installation elevation error to be +/-n/2, m =2n, and the construction error adjustable range of the pile top elevation capable of being compensated is +/-kn. The construction error adjustable range of the pile top elevation which can be compensated is +/-3 n as shown in the embodiment of fig. 8, and the engineering requirement is met. For example, n = 10mm, ± n/2= ± 5mm, and m =20mm, at this time, the construction error range of the height of the compensatable pile top is ± 30 mm.

As shown in fig. 7 and 8, the distance from the second outer cylindrical hole 22 of the outer cylinder 2 to the bottom of the outer cylinder is a, the distance from the second outer cylindrical hole 22 of the outer cylinder 2 to the top of the outer cylinder is b, the distance from the third inner cylindrical hole 43 of the inner cylinder 4 to the bottom of the inner cylinder is c, and the distance from the third inner cylindrical hole 43 of the inner cylinder 4 to the top of the inner cylinder is d. In order to ensure that the outer cylinder 2 does not collide with the pressing block and the inner cylinder 4 does not collide with the top plate 1 when the height of the device is adjusted to be the lowest, the sizes of all parts are required to be more than or equal to c and more than or equal to a + t, and b is more than or equal to d.

Based on the above description of the structure, the height can be adjusted by 3 steps upwards, and the height can be adjusted by 3 steps downwards. However, such a design may not meet the requirement of the actual engineering for height adjustment, so that the engineering requirement can be met by increasing or decreasing the number of the inner barrel openings and changing the number of the adjustable height stages. If a set of fourth inner cylinder holes is added to the upper area of the second inner cylinder holes 42 of the inner cylinder 4, and a set of fifth inner cylinder holes is added to the lower area of the third inner cylinder holes 43, the fourth and fifth inner cylinder holes are also 4 holes, so that the connecting device can be adjusted 5 steps upwards and 5 steps downwards. The inner cylinders with different inner cylinder hole number designs can be selected according to the actual engineering condition and the elevation error requirement so as to realize the engineering requirement.

In addition, the steel structures such as the pile end plate and the like need to be subjected to anticorrosion treatment before the pile is machined, so that the field anticorrosion work is reduced.

The following is that different inner cylinders and corresponding fastening modes can be selected according to elevation requirements.

As shown in fig. 9, the first embodiment is realized under the condition that the error of the pile foundation and the design elevation is within ± n/2, and when the outer cylinder 2 is fitted over the inner cylinder 4, the outer cylinder 2 and the inner cylinder 4 are fitted with 4 first outer cylinder holes 21 and 4 first inner cylinder holes 41.

In the second embodiment shown in fig. 10, when the pile construction time scale is lower than the design elevation (0.5n to 1.5n), the outer cylinder 2 is raised by n relative to the reference position, and is installed corresponding to the inner cylinder 4 by using 4 second outer cylinder holes 22 and 4 second inner cylinder holes 42. The inner cylinder shown in the figure is selected to have a structure comprising 5 groups of inner cylinder holes.

In the third embodiment shown in fig. 11, when the height of the pile construction time scale is lower than the design elevation (1.5n to 2.5n), the outer cylinder 2 is raised by 2n relative to the reference position and rotated 30 ° counterclockwise, and is installed corresponding to the inner cylinder 4 by using 4 first outer cylinder holes 21 and 4 second inner cylinder holes 42. The inner cylinder shown in the figure is selected to be a structure containing 5 groups of inner cylinder holes, and the anticlockwise rotation of 30 degrees refers to a central angle.

In the fourth embodiment shown in fig. 12, when the height of the pile construction time scale is lower than the design elevation (2.5n to 3.5n), the outer cylinder 2 is raised by 3n upward relative to the reference position and rotated 60 ° counterclockwise, and is installed corresponding to the inner cylinder 4 by using 4 third outer cylinder holes 23 and 4 second inner cylinder holes 42. A rotation of 60 deg. counterclockwise refers to a central angle.

In the fifth embodiment shown in fig. 13, when the pile construction height is higher than the design height (0.5n to 1.5n), the outer cylinder 2 is lowered by n relative to the reference position, and is installed in correspondence with the inner cylinder 4 using 4 third outer cylinder holes 23 and 4 third inner cylinder holes 43.

In the sixth embodiment shown in fig. 14, when the pile construction time is higher than the design elevation (1.5n to 2.5n), the outer cylinder 2 is lowered by 2n relative to the reference position and rotated clockwise by 30 °, and is installed corresponding to the inner cylinder 4 using the 4 first outer cylinder holes 21 and the 4 third inner cylinder holes 43. A clockwise rotation of 30 deg. refers to the central angle.

In the seventh embodiment shown in fig. 15, when the pile construction time is higher than the design elevation (2.5n to 3.5n), the outer cylinder 2 is lowered 3n downward and rotated 60 ° clockwise, and is installed corresponding to the inner cylinder 4 using 4 second outer cylinder holes 22 and 4 third inner cylinder holes 43. A clockwise rotation of 60 deg. refers to the central angle.

The above-mentioned embodiment is a structure which is relatively universal for many different working conditions, and particularly, the outer cylinder holes and the inner cylinder holes are circumferentially arranged in accordance with 30 °, and besides, the hole groups on the outer cylinder 2 and the inner cylinder 4 may have other arrangement forms, such as upper and lower hole groups aligned with each other, upper and lower hole groups spaced and staggered, and the arrangement parameters thereof are slightly different from those of the above-mentioned embodiment, but the technical effects of the present invention can be achieved, and therefore, the present invention is within the scope of the present invention.

Claims (10)

1. A three-direction position-adjustable photovoltaic assembly support stand column connecting device is characterized by comprising a first mounting piece connected to the bottom of a stand column base and a second mounting piece connected to a pile top;

the first mounting piece comprises a top plate (1) and an outer cylinder (2) connected to the top plate (1), the top plate (1) is connected to the bottom of a column base, oval holes with long axes vertical to each other are formed in the positions, corresponding to the column base plate (10), of the top plate (1), and the top plate and the column base plate (10) penetrate through and are fixed through a connecting piece, so that the top plate (1) and the column base plate (10) can be transversely and longitudinally displaced relative to each other before being fixed relative to each other;

the second mounting part comprises a bottom plate (3) and an inner cylinder (4) connected to the bottom plate (3), and the bottom plate (3) is fixed to the pile top through a fixing device;

the outer barrel (2) is provided with at least 2 sets of outer barrel hole groups distributed up and down, the inner barrel (4) is provided with at least 1 set of inner barrel hole groups distributed up and down, the outer barrel (2) is sleeved outside the inner barrel (4), and the fixing piece penetrates through 1 set of outer barrel hole groups and 1 set of inner barrel hole groups to fix the first and second installation parts.

2. The three-way position adjustable photovoltaic module bracket column connecting device as claimed in claim 1, wherein 12 outer cylinder holes are formed in the outer cylinder (2), and form 3 outer cylinder hole groups, 4 first outer cylinder holes (21) uniformly distributed on the same circumference form one group, 4 second outer cylinder holes (22) uniformly distributed on the same circumference form one group, the second outer cylinder holes (22) are axially offset from the first outer cylinder holes (21) along the outer cylinder by a distance n, 4 third outer cylinder holes (23) uniformly distributed on the same circumference form one group, and the third outer cylinder holes (23) are axially offset from the first outer cylinder holes (21) along the outer cylinder by a distance n;

the inner cylinder (4) is provided with 12 inner cylinder holes which form 3 groups of inner cylinder hole groups, 4 first inner cylinder holes (41) uniformly distributed on the same circumference are in a group, 4 second inner cylinder holes (42) uniformly distributed on the same circumference are in a group, the second inner cylinder holes (42) are in an upward offset distance of m along the axial direction of the inner cylinder relative to the first inner cylinder holes (41), 4 third inner cylinder holes (43) uniformly distributed on the same circumference are in a group, and the third inner cylinder holes (43) are in a downward offset distance of m along the axial direction of the inner cylinder relative to the first inner cylinder holes (41);

the 12 outer cylinder holes and the 12 inner cylinder holes are uniformly distributed along the circumference of 30 degrees.

3. The three-way position adjustable photovoltaic module bracket column connecting device as recited in claim 2, wherein a group of inner cylinder holes is added in the upper region of the second inner cylinder hole (42), which is 4 fourth inner cylinder holes uniformly distributed on the same circumference, which is offset upward by a distance m along the inner cylinder axis direction with respect to the second inner cylinder hole (42), and which corresponds to the third inner cylinder hole (43) up and down along the inner cylinder axis direction.

4. The three-way position adjustable photovoltaic module bracket column connecting device as recited in claim 3, wherein a group of inner cylinder holes is added to the lower region of the third inner cylinder hole (43), which is 4 fifth inner cylinder holes uniformly distributed on the same circumference, which is offset downward by a distance of m from the third inner cylinder hole (43), and which corresponds to the second inner cylinder hole (42) up and down along the inner cylinder axis.

5. The apparatus according to any one of claims 2 to 4, wherein the footing plate (10) of the photovoltaic module support column allows an installation elevation error of ± n/2, m =2n, the construction error of the pile top elevation that can be compensated is adjustable within a range of ± kn, and k is the number of the inner barrel hole groups on the side wall of the inner barrel (4) and is an odd number group.

6. The three-way position adjustable photovoltaic module rack post connecting device according to claim 5, wherein the number of sets of inner barrel hole groups on the side wall of the inner barrel (4) is k = 3.

7. The three-way position adjustable photovoltaic module support column connecting device as claimed in any one of claims 2 to 4, wherein the bottom plate (3) is of a ring structure, the bottom plate (3) is fixed on the pile end plate (9) by a plurality of fixing devices uniformly distributed on the outer edge of the bottom plate, each fixing device comprises a pressing block (5), a backing plate (6) and a mounting bolt (8), the inner edge of the pressing block (5) presses on the outer edge of the bottom plate (3), the inner edge of the pressing block (5) is 1-2 mm away from the inner cylinder (4), the backing plate 6 is arranged below the outer edge of the pressing block (5), the thickness of the backing plate (6) is consistent with that of the bottom plate (3), a through hole is preset on the pressing block (5), and the mounting bolt (8) penetrates through the through hole, a gap between the bottom plate (3) and the backing plate (6) and then penetrates through the mounting hole of the pile end plate (9), the bottom plate (3) is pressed and fixed on the pile end plate (9), the outer diameter of the bottom plate (3) is 1-2 mm smaller than the diameter of a circle formed by a plurality of mounting bolts (8), and the bottom plate (4) can be integrally and freely rotated to adjust the direction before the mounting bolts (8) are fixed.

8. The photovoltaic module bracket column connecting device capable of adjusting three-way position according to claim 7, wherein the distance from the second outer cylinder hole (22) on the outer cylinder (2) to the bottom of the outer cylinder is a, the distance from the top of the outer cylinder is b, the distance from the third inner cylinder hole (43) on the inner cylinder (4) to the bottom of the outer cylinder is c, the distance from the top of the inner cylinder is d, the thickness of the pressing block (5) is t, c is more than or equal to a + t, and b is more than or equal to d.

9. The three-way position adjustable photovoltaic assembly bracket and column connecting device as claimed in claim 1, wherein the length of the long axis of the elliptical holes on the top plate (1) and the column foot plate (10) is 2 times of the tolerance of displacement control during pile forming.

10. The three-way position adjustable photovoltaic module rack post connecting device according to claim 1, wherein the assembly tolerance between the outer barrel (2) and the inner barrel (4) is 0.5-1.5 mm.

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