CN112688627B

CN112688627B - Photovoltaic support

Info

Publication number: CN112688627B
Application number: CN202011491973.1A
Authority: CN
Inventors: 王士涛; 杨颖�; 刘海军; 马亚男
Original assignee: Arctech Solar Holding Co Ltd
Current assignee: Arctech Solar Holding Co Ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2022-06-21
Anticipated expiration: 2040-12-17
Also published as: CN112688627A

Abstract

The utility model provides a photovoltaic support, includes the purlin that is used for supporting photovoltaic module, is used for vertical stand that is fixed in horizontal installation face, axial install in girder on the stand with the purlin erects the support piece on the girder. The invention also comprises a first driving mechanism, a movable assembly, a fixed piece and a second driving mechanism. The movable assembly is positioned on the stand column and provided with first insections, and the fixing piece is fixedly arranged on the main beam and provided with second insections. The first driving mechanism drives the movable assembly so that the first insections and the second insections have two states of separation and engagement in the axial direction of the main beam. And under the separation state of the first insection and the second insection, the second driving mechanism drives the main beam to rotate so as to adjust the angle. The photovoltaic bracket has the advantages of stable structure, convenient angle adjustment and low cost.

Description

Photovoltaic support

Technical Field

The invention relates to the field of photovoltaic power stations, in particular to a photovoltaic bracket for a photovoltaic power station.

Background

In the photovoltaic power station engineering, the pile foundation engineering and the installation engineering of a photovoltaic support are the largest parts of the civil engineering and electromechanical engineering quantity of the whole photovoltaic power station. The existing photovoltaic support generally adopts a portal steel frame structure, supports an oblique beam through an upright post, installs purlins on the oblique beam and installs photovoltaic modules on the purlins. Photovoltaic support on the existing market has two kinds of angularly irreconcilable and angularly adjustable. The adjustable support of photovoltaic adopts a plurality of push rod arms to connect to realize support angle modulation and location mostly, and the user need adjust every push rod and realize support angle modulation, and the regulation inefficiency and uniformity are difficult to guarantee.

Therefore, there is a need to provide a new photovoltaic support to solve the above problems.

Disclosure of Invention

The invention aims to provide a photovoltaic bracket which has the advantages of convenience in angle adjustment, low adjustment cost, good consistency and stable and reliable structure.

In order to achieve the purpose, the invention adopts the following technical scheme: a photovoltaic bracket comprises a purline for supporting a photovoltaic component, a vertical column for being vertically fixed on a horizontal mounting surface, a main beam arranged on the vertical column, a supporting piece for erecting the purline on the main beam, a first driving mechanism, a movable component, a fixing piece and a second driving mechanism, wherein the movable component is positioned on the vertical column and is provided with first insections, the fixing piece is fixedly arranged on the main beam and is provided with second insections, the movable component comprises a lead screw and a movable plate, the lead screw is driven by the first driving mechanism to circularly rotate around the axis in a forward direction and a reverse direction, the forward circumferential rotation of the lead screw can drive the movable plate to do approaching movement relative to the fixing piece in the axial direction, the approaching movement enables the first insections to be meshed with the second insections, and the reverse circumferential rotation of the lead screw can drive the movable plate to do departing movement relative to the fixing piece in the axial direction, the moving away makes the first insection separate from the second insection, and the second driving mechanism drives the main beam to rotate to adjust the angle under the separation state of the first insection and the second insection.

As a further improved technical solution of the present invention, the screw rod extends axially and is positioned on the upright column, a first thread spirally arranged along the extending direction is disposed on an outer surface of the screw rod, the movable plate is provided with a through hole for the screw rod to pass through, and a second thread matched with the first thread is disposed in the through hole.

As a further improved technical solution of the present invention, the movable plate includes a first movable plate and a second movable plate, the fixing member is a fluted disc including a first disk surface and a second disk surface, the first disk surface and the second disk surface are oppositely disposed so as to axially penetrate through the main beam, the first movable plate is located on a side of the first disk surface of the fluted disc in the axial direction, the second movable plate is located on a side of the second disk surface of the fluted disc in the axial direction, a clamping space is formed between the first movable plate and the second movable plate, the first tooth patterns are disposed facing the clamping space, the second tooth patterns are oppositely and symmetrically disposed on the first disk surface and the second disk surface, the first thread includes two sections with opposite rotation directions, and the second thread on the first movable plate is opposite to the second thread on the second movable plate in rotation directions.

As a further improved technical solution of the present invention, the present invention further includes a guide tube fixed to the column and forming a limiting space, the movable plate includes a first portion and a second portion extending integrally, the first insection is disposed on the first portion, the through hole is disposed on the second portion, the second portion is located in the limiting space, and the first portion is exposed outside the limiting space.

As a further improved technical solution of the present invention, the guide tube includes a first side wall, a second side wall, a third side wall, and a fourth side wall, the first side wall, the second side wall, the third side wall, and the fourth side wall are surrounded to form the limiting space, the first side wall is attached to the column, the third side wall is opposite to the first side wall, the first side wall and the third side wall are both provided with through holes corresponding to the through holes for the screw rod to pass through, and the first thread is located in the limiting space.

As a further improved technical solution of the present invention, the first driving mechanism is a rocker, the rocker includes a positioning arm, a connecting arm and an operating arm, the connecting arm is integrally connected between the positioning arm and the operating arm, the positioning arm and the operating arm are respectively located at two ends of the connecting arm and extend in opposite directions, the positioning arm is connected with the lead screw, and the operating arm can drive the lead screw to make a circular motion by using the positioning arm as an axis.

As a further improved technical scheme of the invention, one end of the screw rod in the extension direction comprises one of a convex part and a concave part, the positioning arm is provided with the other one of the convex part and the concave part, and the screw rod and the positioning arm are in clamping connection in a mode of matching the convex part and the concave part.

As a further improved technical scheme of the invention, the number of the upright columns is N which is not less than 2 and is arranged at intervals, the movable plate and the fluted disc are distributed beside each upright column, and the main beam is one and is connected between the upright columns.

As a further improved technical solution of the present invention, N =3, the screw includes a first screw, a second screw and a third screw, which are fixedly connected in sequence, and the first screw is connected to the first driving mechanism.

As a further improved technical solution of the present invention, each of the first screw rod, the second screw rod and the third screw rod includes a convex portion and a concave portion at two ends in an extending direction, and the first screw rod and the second screw rod and the third screw rod are connected in a locking manner by the convex portion and the concave portion.

Compared with the prior art, the first driving mechanism of the photovoltaic bracket can enable the first insection and the second insection to have two states of separation and engagement in the axial direction of the main beam. When the first driving mechanism works to achieve the separation state, the second driving mechanism works, so that the angle adjustment of the bracket is facilitated; and after the bracket is adjusted to a required angle, the first driving mechanism works again to achieve the engagement state, and the bracket is kept at a fixed angle. Therefore, the photovoltaic support has the advantages of stable structure, convenience in angle adjustment and low cost, and has the beneficial effect of good adjustment consistency.

Drawings

FIG. 1 is a perspective assembly view of a photovoltaic mount of the present invention;

FIG. 2 is a front view of the photovoltaic support of the present invention in an engaged state;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is a front view of the photovoltaic support of the present invention in a detached state;

FIG. 5 is an enlarged view of a portion of FIG. 4;

FIG. 6 is a perspective assembly view of a portion of the photovoltaic mount of the present invention;

fig. 7 is an exploded perspective view of a portion of a photovoltaic mount of the present invention;

FIG. 8 is an exploded perspective view of a portion of FIG. 7;

FIG. 9 is an exploded perspective view of another portion of FIG. 7;

FIG. 10 is a perspective assembly view of another portion of the photovoltaic mount of the present invention;

FIG. 11 is another angled view of FIG. 10;

FIG. 12 is a perspective assembly view of yet another portion of a photovoltaic mount of the present invention;

fig. 13 is an exploded perspective view of a first drive mechanism and lead screw in a photovoltaic mount of the present invention.

Detailed Description

Referring to fig. 1 to 13, a photovoltaic support includes a purlin 1 for supporting a photovoltaic module, a vertical column 2 for vertically fixing on a horizontal mounting surface, a main beam 3 installed on the vertical column 2, a support member 4 for erecting the purlin 1 on the main beam 3, a first driving mechanism, a movable assembly driven by the first driving mechanism, a fixing member fixed on the main beam 3 and matched with the movable assembly, and a second driving mechanism for driving the main beam 3.

Referring to fig. 1 to 13, and particularly to fig. 7 and 9, in an embodiment, the movable assembly includes a screw 5 and a movable plate 6, and the screw 5 is parallel to the main beam 3. The main beam 3 is a square tube with a square cross section, the fixing piece is a fluted disc 7 with a square hole in the middle, and the square main beam 3 penetrates through the square hole of the fluted disc 7 and is clamped, positioned and fixed on the main beam 3 by means of welding or bonding and the like; of course, the main beam 3 is not limited to a square tube, but the cross section thereof may be circular or other shapes, and the main beam 3 with a circular cross section needs to be correspondingly changed into a circular hole to be matched with the square hole on the fluted disc 7.

Referring to fig. 1 to 13, and particularly to fig. 7, in this embodiment, the first driving mechanism is a rocker 11, and in other embodiments, the first driving mechanism may also be another driving device such as a motor.

Referring to fig. 1 to 13, and in particular to fig. 6 and 7, the rocker 11 includes a positioning arm 111, a connecting arm 112 and an operating arm 113. The connecting arm 112 is integrally connected between the positioning arm 111 and the operating arm 113, and the positioning arm 111 and the operating arm 113 are respectively located at two ends of the connecting arm 112 and extend in opposite directions. The positioning arm 111 is connected with the screw rod 5, and the operating arm 113 can drive the screw rod 5 to make circular motion by using the positioning arm 111 as an axis.

Referring to fig. 1 to 13, and particularly to fig. 6, 7, 12 and 13, in the present embodiment, one end of the screw rod 5 in the extending direction includes a protrusion 51, the positioning arm 111 is provided with a recess 52, and the screw rod 5 and the positioning arm 111 are in a form of a snap connection by inserting the protrusion 51 into the recess 52. Of course, in other embodiments, the positions of the convex portion 51 and the concave portion 52 may be interchanged, that is, the concave portion 52 is disposed at one end of the lead screw 5 in the extending direction, and the convex portion 51 is disposed on the positioning arm 111, so that the locking engagement between the lead screw 5 and the positioning arm 111 may also be realized.

Referring to fig. 1 to 13, and particularly to fig. 9, the screw rod 5 extends axially and is positioned on the upright 2, and the outer surface of the screw rod 5 is provided with a first thread 50 spirally arranged along the extending direction. The movable plate 6 is provided with a through hole 620 for the screw rod 5 to pass through, and a second thread 6200 matched with the first thread 50 is arranged in the through hole 620.

Referring to fig. 1 to 13, and particularly to fig. 3, 5 and 9, the movable plate 6 includes a first movable plate 601 and a second movable plate 602. The fixing piece is a fluted disc 7 comprising a first disc surface 71 and a second disc surface 72, and the first disc surface 71 and the second disc surface 72 are oppositely arranged. The fluted disc 7 further comprises a circular ring surface 73 which is connected between the first disc surface 71 and the second disc surface 72 and surrounds the main beam 3 in a circular ring shape, and the circular ring surface 73 has no tooth pattern. The first movable plate 601 is located on the side of the first disk surface 71 of the fluted disc 7 in the axial direction of the main beam 3, and the second movable plate 602 is located on the side of the second disk surface 72 of the fluted disc 7 in the axial direction of the main beam. A clamping space 600 is formed between the first movable plate 601 and the second movable plate 602, the first movable plate 601 and the second movable plate 602 are respectively provided with a first insection 610 arranged facing the clamping space 600, and the first disk face 71 and the second disk face 72 are respectively provided with a second insection 70 extending outward, that is, the second insection 70 on the first disk face 71 and the second insection 70 on the second disk face 72 are arranged in an opposite symmetry manner. The second insections 70 are disposed on both the first disk surface 71 and the second disk surface 72 in a circular ring shape and surround the main beam 3, so that the main beam 3 can be fixed at any angle by engaging the first insections 610 with part of the second insections 710, regardless of the angle of the main beam 3. The first thread 50 has two opposite rotation directions, and the first movable plate 601 and the second movable plate 602 include two second threads 6200 with opposite rotation directions.

Referring to fig. 1 to 13, and in particular to fig. 6, 7 and 9, the present invention further comprises a guide tube 9 fixed to the upright 2. The guide tube 9 includes a first sidewall 91 fixed to the upright 2, a third sidewall 93 opposite to the first sidewall 91, and a second sidewall 92 and a fourth sidewall 94 opposite to the first sidewall 91 and the third sidewall 93, where the first sidewall 91, the second sidewall 92, the third sidewall 93, and the fourth sidewall 94 enclose the limiting space 901. Each of the movable plates 6 includes a first portion 61 and a second portion 62 extending integrally. The first insection 610 is provided on the first portion 61, and the through hole 620 is provided on the second portion 62. The first portion 61 is exposed outside the spacing space 901. The first side wall 91 and the third side wall 93 are provided with through holes 902 corresponding to the through holes 620 for the lead screws 5 to pass through. The second portion 62 is vertically located in the limiting space 901, the first thread 50 is axially located in the limiting space 901, and the first thread 50 and the second thread 6200 are spirally matched in the limiting space 901.

Referring to fig. 1-13, and in particular to fig. 10 and 11, the present invention further includes an upper mounting assembly 12 and a lower mounting assembly 13. In this embodiment, the second driving mechanism includes a motor and a push rod 8. The push rod 8 includes an outer sleeve 81 and an inner rod 82 accommodated in the outer sleeve 81. The motor of the second drive mechanism is mounted to the outer sleeve 81 of the push rod 8. The outer sleeve 81 is fixedly connected with the upright post 2 through the lower mounting component 13, one end of the inner rod 82 is connected with the motor and can be driven by the motor to do telescopic motion, and the other end of the inner rod 82 is connected with the main beam 3 through the upper mounting component 12. In this embodiment, the working principle that the motor of the second driving mechanism pushes the main beam 3 to rotate through the push rod 8 is well known in the industry, and details are not described here. In an alternative manner, the second driving mechanism may also be a swing drive, and includes a motor and a turbine-worm pair disposed at a driving end of the motor, wherein a worm in the turbine-worm pair is connected to the driving end of the motor, a through hole is formed in a worm wheel in the turbine-worm pair, and the main beam 3 is adapted to penetrate through the through hole, so that the turbine and the main beam 3 rotate synchronously. The motor starts to drive the worm and the worm wheel to rotate, and further drives the main beam 3 to rotate.

Referring to fig. 1 to 13, and particularly to fig. 1, 10 and 11, in detail, the upper mounting assembly 12 includes a hoop 121, an angle iron 122 and a reinforcing plate 123. The hoop 121 comprises a wall plate 121 and a U-shaped bolt, the two ends of the U-shaped bolt are fixed on the wall plate 121 through fasteners, so that the U-shaped bolt and the wall plate 121 form an installation space, the hoop 121 is sleeved on the main beam 3, the end wall of the wall plate 121 is attached to the main beam 3, the hoop 121 is tightly installed on the main beam 3 through the fasteners which are locked, and synchronous rotation of the hoop 121 and the main beam 3 is achieved. In this embodiment, two sets of U-bolts are provided. . The angle steel 122 is provided with two pieces which are arranged symmetrically left and right, one end of the angle steel 122 is fixed on the wall plate 121, and the other end of the angle steel 122 is pivotally connected with the inner rod 82 through a pin. The reinforcing plate 123 is fixedly connected between the two pieces of angle steel 122. The lower mounting assembly 13 includes a first base plate 131 fixed to the pillar 2 and a second base plate 132 fixedly connected to the first base plate 131. The end of the second base plate 132 remote from the first base plate 131 is pivotally mounted by a hinge to a connection portion, preferably a lug arrangement, on the outer sleeve 81.

Referring to fig. 1 to 13, and particularly to fig. 3 and 5, the working principle of the present invention is: the rocker 11 drives the screw rod 5 to perform forward and reverse circumferential rotation around the axis, and by means of the first thread 50 and the second thread 6200 which are matched with each other, the forward circumferential rotation of the screw rod 5 can drive the movable plate 6 to perform approaching motion relative to the fluted disc 7 in the axial direction, the approaching motion enables the first insection 610 to be meshed with the second insection 70, the reverse circumferential rotation of the screw rod 5 can drive the movable plate 6 to perform keeping-away motion relative to the fluted disc 7 in the axial direction, and the keeping-away motion enables the first insection 610 to be separated from the second insection 70. That is, the first insections 610 and the second insections 70 have two states of separation and engagement in the axial direction of the main beam 3. Preferably, when there are two movable plates 6 corresponding to each toothed plate 7, since the first threads 50 and the second threads 6200 are disposed as forward and reverse threads, the first movable plate 601 and the second movable plate 602 are close to each other in the same direction and clamp the toothed plate 7, so that the first threads 610 are engaged with the second threads 70; the first movable plate 601 and the second movable plate 602 are simultaneously away from the fluted disc 7, so that the first tooth pattern 610 and the second tooth pattern 70 are in a separated state. In the separated state of the first insections 610 and the second insections 70, the second driving mechanism drives the main beam 3 to rotate to adjust the angle. Compared with the prior art, the angle adjustment of the bracket is facilitated in the separation state; and the bracket is held at a fixed angle by the engagement state after being adjusted to a desired angle. The photovoltaic bracket has the advantages of stable structure and convenient angle adjustment.

Referring to fig. 1 to 13, and particularly to fig. 1, 12 and 13, the number of the columns 2 is N, which is not less than 2, and the movable plate 6 and the toothed plate 7 are disposed beside each column 2. In the present embodiment, N =3, that is, three columns 2 are provided. In this embodiment, the lead screw 5 is provided in segments, and includes a first lead screw 501, a second lead screw 502, and a third lead screw 503 fixedly connected in sequence, that is, the head end of the first lead screw 501 is connected to the rocker 11, the head end of the second lead screw 502 is connected to the tail end of the first lead screw 501, and the head end of the third lead screw 503 is connected to the tail end of the second lead screw 502; in other embodiments, the lead screw 5 may be a single lead screw connected to the rocker 11 through three of the columns 2.

Referring to fig. 1 to 13, and particularly to fig. 13, in the present embodiment, each of the first lead screw 501, the second lead screw 502 and the third lead screw 503 includes a convex portion 51 and a concave portion 52 at two ends in the extending direction, and the positioning arm 111 also has one of the convex portion 51 and the concave portion 52. The positioning arm 111 and the first lead screw 501, the first lead screw 501 and the second lead screw 502, and the second lead screw 502 and the third lead screw 503 are connected in a locking manner by the matching of the convex part 51 and the concave part 52. No matter the three screw rods (the first screw rod 501, the second screw rod 502 and the third screw rod 503) which are separately arranged or the single screw rod 5 which is separately arranged, the purpose is to be in matching connection with the rocker 11 for transmission, and the rocker 11 drives the screw rod 5 to further drive the movable plate 6 to switch between the meshing state and the separating state with the fluted disc 7.

Referring to fig. 1 to 13, in the present invention, the main beam 3 is one and is connected between the columns 2. The first drive mechanism and the second drive mechanism are at least one. In most cases, the first drive mechanism is one, and the second drive mechanism is plural. In this way, the user controls and operates the rotation of one rocker 11, which is simultaneously transmitted to the plurality of movable plates 6 through the lead screw 5, so as to drive the plurality of movable plates 6 to move simultaneously, and the plurality of movable plates 6 and the plurality of fluted discs 7 have the same engaging or disengaging state. Therefore, when the main beam 3 is in a state of being separated from one movable plate 6 and the fluted discs 7, the main beam 3 can be driven by the second driving mechanisms simultaneously to synchronously adjust the purlines 1 on the same main beam 3, so that the adjusting cost is reduced, the adjusting efficiency is effectively improved, and the adjusting consistency is ensured to be good. The invention realizes the meshing state by multiple points along the axial direction of the main beam 3, so as to form fixed points of angle positions at the multiple points of the axial direction of the main beam, form locking by the multiple points of the axial direction, improve the grade of bearing transverse wind (vertical to the horizontal direction of the main beam), realize the locking of the multiple points when the wind is strong, and have better angle consistency and wind resistance.

Referring to fig. 1 to 13, and particularly to fig. 6 to 8, the photovoltaic bracket of the present invention may further include a bearing 14 and a bearing ring seat 15. The bearing 14 is arranged at the joint of the main beam 3 and the upright post 2, and the bearing 14 is arranged on the main beam 3 in a surrounding manner in the circumferential direction. The bearing 14 functions as: and 3, supporting the main beam 3 to reduce friction. The top end of the upright post 2 forms a bealock 20, and the bealock 20 is blocked to limit the bearing ring seat 15. The bearing ring seat 15 has the following functions: the bearing 14 is externally surrounded, and the bearing 14 is defined on the main beam 3 and fixed at the bealock 20 of the upright 2. The bearing 14 and the bearing ring seat 15 generally function to position and support the main beam 3 on the column 2 and reduce friction during rotation of the main beam 3.

In summary, compared with the prior art, the first driving mechanism of the photovoltaic bracket of the present invention can make the first insection 610 and the second insection 70 have two states of separation and engagement in the vertical direction. When the first driving mechanism works to achieve the separation state, the second driving mechanism works, so that the angle adjustment of the bracket is facilitated; and after the bracket is adjusted to a required angle, the first driving mechanism works again to achieve the engagement state, and the bracket is kept at a fixed angle. Therefore, the photovoltaic bracket has the advantages of stable structure and convenient angle adjustment. Further, under the state that the main beam 3 is separated from the plurality of movable rods 6 and the plurality of fluted discs 7 which are supported by one or more stand columns 2, the main beam 3 can be driven by one second driving mechanism to simultaneously adjust the plurality of purlines 1 on one main beam 3, so that the adjusting cost is reduced, the adjusting efficiency is effectively improved, and the good adjusting consistency is ensured.

The above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, and the understanding of the present specification should be based on the technical personnel in the technical field, such as the directional descriptions of "front", "back", "left", "right", "upper", "lower", etc., although the present specification has described the present invention in detail with reference to the above embodiments, the ordinary skilled in the art should understand that the technical personnel in the technical field can still make modifications or equivalent substitutions on the present invention, and all the technical solutions and modifications thereof without departing from the spirit and scope of the present invention should be covered in the claims of the present invention.

Claims

1. The utility model provides a photovoltaic support, includes purlin (1) for supporting photovoltaic module, for vertical stand (2) of being fixed in on the horizontal installation face, axial install in girder (3) on stand (2) and with purlin (1) erect support piece (4) on girder (3), its characterized in that: the movable component is positioned on the stand column (2) and is provided with a first insection (610), the fixing component is fixedly arranged on the main beam (3) and is provided with a second insection (70), the movable component comprises a screw rod (5) and a movable plate (6), the first driving mechanism drives the screw rod (5) to rotate around the axis in a forward and reverse circumferential direction, the forward circumferential direction of the screw rod (5) can drive the movable plate (6) to move close to the fixing component in the axial direction, the close motion enables the first insection (610) to be meshed with the second insection (70), and the reverse circumferential direction of the screw rod (5) can drive the movable plate (6) to move far away from the fixing component in the axial direction, the moving away makes the first insection (610) and the second insection (70) separate, and the second driving mechanism drives the main beam (3) to rotate to adjust the angle under the separation state of the first insection (610) and the second insection (70).

2. The photovoltaic support of claim 1, wherein: the screw rod (5) axially extends and is positioned on the upright post (2), first threads (50) spirally arranged along the extending direction of the screw rod (5) are arranged on the outer surface of the screw rod (5), a through hole (620) for the screw rod (5) to pass through is formed in the movable plate (6), and second threads (6200) matched with the first threads (50) are arranged in the through hole (620).

3. The photovoltaic support of claim 2, wherein: the movable plate (6) comprises a first movable plate (601) and a second movable plate (602), the fixed member is a fluted disc (7) comprising a first disc surface (71) and a second disc surface (72), the first disc surface (71) and the second disc surface (72) are oppositely arranged to enable the main beam (3) to axially penetrate through, the first movable plate (601) is located on the side of the first disc surface (71) of the fluted disc (7) in the axial direction, the second movable plate (602) is located on the side of the second disc surface (72) of the fluted disc (7) in the axial direction, a clamping space (600) is formed between the first movable plate (601) and the second movable plate (602), the first threads (610) are arranged facing the clamping space (600), the second threads (70) are oppositely and symmetrically arranged on the first disc surface (71) and the second disc surface (72), and the first threads (50) comprise two sections with opposite rotation directions, the second threads (6200) on the first movable plate (601) are opposite in direction to the second threads (6200) on the second movable plate (602).

4. The photovoltaic support of claim 2, wherein: the movable plate (6) comprises a first part (61) and a second part (62) which extend integrally, the first insection (610) is arranged on the first part (61), the through hole (620) is arranged on the second part (62), the second part (62) is located in the limiting space (901), and the first part (61) is exposed out of the limiting space (901).

5. The photovoltaic support of claim 4, wherein: the guide tube (9) comprises a first side wall (91), a second side wall (92), a third side wall (93) and a fourth side wall (94), the first side wall (91), the second side wall (92), the third side wall (93) and the fourth side wall (94) are arranged in a surrounding mode to form the limiting space (901), the first side wall (91) is fixedly attached to the upright post (2), the third side wall (93) and the first side wall (91) are arranged oppositely, the first side wall (91) and the third side wall (93) are provided with through holes (902) corresponding to the through holes (620) for the screw rod (5) to penetrate through, and the first threads (50) are located in the limiting space (901).

6. The photovoltaic support of claim 2, wherein: the first driving mechanism is a rocker (11), the rocker (11) comprises a positioning arm (111), a connecting arm (112) and an operating arm (113), the connecting arm (112) is integrally connected between the positioning arm (111) and the operating arm (113), the positioning arm (111) and the operating arm (113) are respectively located at two ends of the connecting arm (112) and extend in a bending mode towards opposite directions, the positioning arm (111) is connected with the lead screw (5), and the operating arm (113) can drive the lead screw (5) to do circular motion by taking the positioning arm (111) as an axis.

7. The photovoltaic support of claim 6, wherein: one end of the screw rod (5) in the extending direction comprises one of a convex part (51) and a concave part (52), the positioning arm (111) is provided with the other one of the convex part (51) and the concave part (52), and the screw rod (5) is in clamping connection with the positioning arm (111) in a mode of matching the convex part (51) with the concave part (52).

8. The photovoltaic support of claim 3, wherein: stand (2) are one row of interval setting not less than 2N, and the side of each stand (2) is laid fly leaf (6) with fluted disc (7), girder (3) are one and connect in between stand (2).

9. The photovoltaic support of claim 8, wherein: the N =3, the screw rod (5) comprises a first screw rod (501), a second screw rod (502) and a third screw rod (503) which are fixedly connected in sequence, and the first screw rod (501) is connected with the first driving mechanism.

10. The photovoltaic support of claim 9, wherein: each of the first screw rod (501), the second screw rod (502) and the third screw rod (503) comprises a convex part (51) and a concave part (52) which are positioned at two ends in the extending direction, and the first screw rod (501) and the second screw rod (502) and the third screw rod (503) are connected in a clamping mode in which the convex part (51) is matched with the concave part (52).