Photovoltaic racking and photovoltaic racking installation method

Abstract

The application provides a photovoltaic support and a photovoltaic support installation method. The photovoltaic support installation method of the application comprises the following steps: S1, arranging a sleeve on a support; S2, threading a prestressed cable into the sleeve so that the sleeve can support the prestressed cable; S3, adjusting the sleeve so that the extension direction of the sleeve is adapted to the extension direction of the prestressed cable; wherein the step S3 has no sequence with the step S1 and the step S2. Therefore, the photovoltaic support installation method of the application has the advantages of low construction difficulty, high practicability and long service life of the photovoltaic support.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solar power generation equipment, in particular to a photovoltaic support and a photovoltaic support installation method. BACKGROUND

[0002] In the related art, the flexible photovoltaic support system bears external load by applying a pre-tension to the steel cable, and the pre-stressed steel cable is fixed by a buckle after tensioning. Since the flexible photovoltaic support is usually installed on a slope with large terrain undulations, the displacement of the steel cable is limited by the buckle, so the pre-stressed steel cable will be bent at this point, and the steel cable will bear a large shear force. The steel cable is prone to breakage under the condition of bearing a large shear force for a long time. SUMMARY

[0003] The present application aims to at least partially solve one of the technical problems in the related art. To this end, an embodiment of the present application proposes a photovoltaic support and a photovoltaic support installation method.

[0004] The photovoltaic support installation method of the embodiment of the present application, the photovoltaic support comprising a pre-stressed cable, a sleeve and a support, the photovoltaic support installation method comprising the following steps:

[0005] S1, placing the sleeve on the support;

[0006] S2, threading the pre-stressed cable into the sleeve so that the sleeve can support the pre-stressed cable;

[0007] S3, adjusting the sleeve so that the extension direction of the sleeve is adapted to the extension direction of the pre-stressed cable;

[0008] The step S3 has no sequence with the step S1 and the step S2.

[0009] Therefore, the photovoltaic support installation method according to the embodiment of the present application has the advantages of low construction difficulty, high practicability and long service life of the photovoltaic support.

[0010] In some embodiments, the step S1 is implemented after the step S3 is implemented;

[0011] and / or, the step S3 is implemented between the step S1 and the step S2;

[0012] and / or, the step S3 is implemented after the step S2 is implemented.

[0013] In some embodiments, the sleeve is a straight pipe extending in the horizontal direction;

[0014] The photovoltaic support has a plurality of prestressed cable installation positions, the plurality of prestressed cable installation positions include a first position, a second position and a third position arranged in sequence along the extension direction of the prestressed cable, the second position is located on the support, and the sleeve is arranged on the second position of the support;

[0015] In the step S3, when the second position has a height difference with at least one of the first position and the third position, and / or the first position, the second position and the third position are not on the same horizontal straight line, at least part of the sleeve is bent.

[0016] In some embodiments, the sleeve includes a first segment and a second segment connected to each other, the connecting part of the first segment and the second segment is arranged on the second position of the support, the first segment is located between the second segment and the first position in the extension direction of the prestressed cable, the second segment is located between the first segment and the third position in the extension direction of the prestressed cable, the central axis of the first segment has a first end and a second end, the first end is an end of the central axis of the first segment away from the second position, and the second end is located at the second position, the central axis of the second segment has a third end and a fourth end, the third end is located at the second position, and the fourth end is an end of the central axis of the second segment away from the second position;

[0017] In the step S3,

[0018] When the second position has a height difference with the first position, and / or the extension direction of the first segment is inconsistent with the extension direction of the horizontal straight line on which the second position and the first position are located, the first segment is bent, and the first end is moved in the direction adjacent to the first position;

[0019] When the second position has a height difference with the third position, and / or the extension direction of the second segment is inconsistent with the extension direction of the horizontal straight line on which the second position and the third position are located, the second segment is bent, and the fourth end is moved in the direction adjacent to the third position.

[0020] In some embodiments, in the step S3,

[0021] When the first position, the second position and the third position are on the same horizontal straight line and the second position has a height difference with the first position, the first segment is bent in the up-down direction, and the first end is located between the first position and the second end in the up-down direction;

[0022] The first position, the second position and the third position are on the same horizontal straight line and the second position and the third position have a height difference, the second section is bent in the up-down direction, and the fourth end portion is located between the third position and the third end portion in the up-down direction.

[0023] In some embodiments, in the step S3, the first position, the second position and the third position are on the same horizontal height, the second position and the first position are on a first horizontal straight line, the second position and the third position are on a second horizontal straight line, and the first horizontal straight line intersects with the second horizontal straight line,

[0024] The extension direction of the sleeve is set as the extension direction of the first horizontal straight line, the second section is bent in the horizontal direction, and the fourth end portion is located between the third end portion and the third position in the direction perpendicular to the first horizontal straight line;

[0025] Or, the extension direction of the sleeve is set as the extension direction of the second horizontal straight line, the first section is bent in the horizontal direction, and the first end portion is located between the second end portion and the first position in the direction perpendicular to the second horizontal straight line;

[0026] Or, the first section and the second section are bent, and the fourth end portion is located between the third end portion and the third position in the direction perpendicular to the first horizontal straight line, and the first end portion is located between the second end portion and the first position in the direction perpendicular to the second horizontal straight line.

[0027] In some embodiments, in the step S3, the second position and the first position are on a first horizontal straight line, the second position and the third position are on a second horizontal straight line, the first horizontal straight line intersects with the second horizontal straight line,

[0028] The second position and the first position have a height difference, the first section is bent, the first end portion is located between the first position and the second end portion in the up-down direction, and the first end portion is located between the second end portion and the first position in the direction perpendicular to the second horizontal straight line;

[0029] The second position and the third position have a height difference, the second section is bent, the fourth end portion is located between the third position and the third end portion in the up-down direction, and the fourth end portion is located between the third end portion and the third position in the direction perpendicular to the first horizontal straight line.

[0030] In some embodiments, a tangent line at the first end of the middle axis of the first segment is parallel to a straight line connecting the first position and the second position;

[0031] a tangent line at the fourth end of the middle axis of the second segment is parallel to a straight line connecting the third position and the second position.

[0032] In some embodiments, the middle axis of the first segment is a circular arc, and / or the middle axis of the second segment is a circular arc.

[0033] In some embodiments, the middle axis of the first segment is a first circular arc, the first circular arc satisfying a formula:

[0034] r1=180L1 / θ1π;

[0035] wherein r1 is a radius of the first circular arc, L1 is a length of the middle axis of the first segment, θ1 is an angle size of a first included angle, the first included angle being an included angle between the straight line connecting the first position and the second position and a horizontal plane, or the first included angle being an included angle between the straight line connecting the first position and the second position and a straight line connecting the second position and the third position;

[0036] and / or the middle axis of the second segment is a second circular arc, the second circular arc satisfying a formula: r2=180L2 / θ2π;

[0037] wherein r2 is a radius of the second circular arc, L2 is a length of the middle axis of the second segment, θ2 is an angle size of a second included angle, the second included angle being an included angle between the straight line connecting the third position and the second position and the horizontal plane, or the second included angle being an included angle between the straight line connecting the third position and the second position and the straight line connecting the second position and the first position.

[0038] In some embodiments, the middle axis of the first segment is parabolic, and / or the middle axis of the second segment is parabolic.

[0039] In some embodiments, the middle axis of the first segment extends along an extension direction of a first parabola, the first parabola satisfying a formula: y=a1x 2 ;

[0040] a length of the middle axis of the first segment satisfies a formula:

[0041] The coordinate vertex and the coordinate axis origin of the first parabola are the second position, x is the horizontal coordinate value of the first parabola, a1 is the constant of the first parabola, y is the vertical coordinate value of the first parabola, l1 is the length of the central axis of the first section, x1 is the length of the central axis of the first section on the horizontal coordinate axis, the extension direction of the horizontal coordinate axis of the first parabola is consistent with the extension direction of the projection of the straight line connecting the first position and the second position on the horizontal plane, the extension direction of the vertical coordinate axis of the first parabola is consistent with the up-down direction, or the extension direction of the horizontal coordinate axis of the first parabola and the extension direction of the vertical coordinate axis of the first parabola are both horizontal directions and perpendicular to each other.

[0042] And / or, the central axis of the second section extends along the extension direction of the second parabola, and the second parabola satisfies the formula:

[0043] y=a2x 2 ;

[0044] The length of the central axis of the second section satisfies the formula:

[0045] The coordinate vertex and the coordinate axis origin of the second parabola are the second position, x is the horizontal coordinate value of the second parabola, a2 is the constant of the second parabola, y is the vertical coordinate value of the second parabola, l2 is the length of the central axis of the second section, x2 is the length of the central axis of the second section on the horizontal coordinate axis, the extension direction of the horizontal coordinate axis of the second parabola is consistent with the extension direction of the projection of the straight line connecting the third position and the second position on the horizontal plane, the extension direction of the vertical axis of the second parabola is consistent with the up-down direction, or the extension direction of the horizontal coordinate axis of the second parabola and the extension direction of the vertical coordinate axis of the second parabola are both horizontal directions and perpendicular to each other.

[0046] In some embodiments, the sleeve and the support are both multiple, multiple supports are arranged at intervals, and multiple sleeves are arranged one by one on multiple supports, each support has the prestressed cable installation position.

[0047] The photovoltaic support further comprises an end column, the end column has the prestressed cable installation position, and the end column is used for fixing the end of the prestressed cable.

[0048] The application also provides a photovoltaic support suitable for the photovoltaic support installation method, which comprises a prestressed cable, a sleeve and a support, the sleeve is arranged on the support, the prestressed cable is located in the sleeve, and the extension direction of the sleeve is adapted to the extension direction of the prestressed cable.

[0049] In some embodiments, the bracket is provided with a fixing plate and a buckle, the buckle is clamped on the fixing plate and can fix the sleeve on the fixing plate.

[0050] In some embodiments, the sleeve comprises a first section and a second section connected to each other, the buckle is arranged on the circumferential side of the connection between the first section and the second section of the sleeve, the first section is a straight pipe or a bent pipe, and the second section is a straight pipe or a bent pipe.

[0051] In some embodiments, the length of the first section is equal to the length of the second section.

[0052] In some embodiments, the ratio of the length of the sleeve to the outer diameter of the sleeve is (8-10):1.

[0053] In some embodiments, the inner wall of the sleeve is provided with a damping lubricating layer, the damping lubricating layer is composed of at least one of a damping material and a lubricating material.

[0054] In some embodiments, the damping lubricating layer is graphite or a polytetrafluoroethylene plate.

[0055] In some embodiments, the sleeve and the bracket are both multiple, the multiple brackets are arranged at intervals, and the multiple sleeves are arranged one by one on the multiple brackets.

[0056] The photovoltaic bracket further comprises an end column for fixing the end of the prestressed cable. BRIEF DESCRIPTION OF DRAWINGS

[0057] Figure 1 is a schematic view of a fixing plate and a buckle according to an embodiment of the present application.

[0058] Figure 2 is a schematic view of a stress cable and a sleeve according to an embodiment of the present application.

[0059] Figure 3 is a schematic view of a sleeve according to an embodiment of the present application.

[0060] Figure 4 is a schematic view of a photovoltaic bracket according to an embodiment of the present application.

[0061] Figure 5 is an experimental view of a prestressed cable in a sleeve according to an embodiment of the present application.

[0062] Figure 6 is an experimental view of a prestressed cable in a buckle according to an embodiment of the present application.

[0063] Figure 7 is a finite element result stress cloud chart of a prestressed cable in a sleeve according to an embodiment of the present application.

[0064] Figure 8 This is a finite element result stress cloud diagram of the prestressed cable within the buckle according to an embodiment of the present invention.

[0065] Figure label:

[0066] Photovoltaic bracket 100, first position 101, second position 102, third position 103;

[0067] Support 1, first support 11, second support 12, third support 13;

[0068] Prestressed cable 2;

[0069] Sleeve 3, first section 31, first end 311, second end 312, second section 32, third end 321, fourth end 322, vibration damping and lubrication layer 33;

[0070] Fixed plate 4, clip 5. Detailed Implementation

[0071] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0072] The photovoltaic bracket 100 and its installation method according to embodiments of the present invention are described below with reference to the accompanying drawings. Figures 1 to 4 As shown, the photovoltaic support 100 according to an embodiment of the present invention includes a prestressed cable 2, a sleeve 3, and a support 1. The installation method of the photovoltaic support 100 according to an embodiment of the present invention includes the following steps:

[0073] S1. Place the sleeve 3 on the bracket 1.

[0074] S2. Insert the prestressed cable 2 into the sleeve 3 so that the sleeve 3 can support the prestressed cable 2.

[0075] S3. Adjust the sleeve 3 so that its extension direction matches the extension direction of the prestressed cable 2. Step S3 has no sequential order with steps S1 and S2.

[0076] In related technologies, flexible photovoltaic support systems bear external loads by applying prestress to steel cables. After tensioning, the prestressed steel cables are fixed with clips. Since flexible photovoltaic supports are often installed on slopes with significant terrain undulations, the displacement of the steel cables is restricted by the clips, causing the prestressed steel cables to bend at these locations. Under such conditions, the cables will bear substantial shear forces. Under prolonged exposure to such large shear forces, the steel cables are highly susceptible to breakage.

[0077] According to an embodiment of the present invention, the installation method of the photovoltaic support 100 involves placing a sleeve 3 on the support 1, so that during the installation of the photovoltaic support 100, the prestressed cable 2 can extend into and be fixed within the sleeve 3 on the support 1, so that the sleeve 3 supports and limits the prestressed cable 2 located therein. Compared with the related technology of fixing the prestressed cable 2 by clips, the sleeve 3 has a larger contact area with the prestressed cable 2, which makes it easier for the sleeve 3 to support the prestressed cable 2 and can better reduce the shear force on the prestressed cable 2 at the support 1, thereby reducing the damage to the prestressed cable 2 at the support 1 and improving the service life of the prestressed cable.

[0078] Furthermore, in step S3, the sleeve 3 is adjusted so that its extension direction matches the extension direction of the prestressed cable 2. Specifically, the sleeve 3 is a straight or curved pipe, and the adjusted shape of the sleeve 3 is consistent with the extension direction of the prestressed cable 2 located within it. This allows the inner wall of the sleeve 3 to better fit and support the prestressed cable 2, reducing the shear force on the prestressed cable 2 at the end of the support 1, thereby further reducing damage to the prestressed cable 2 by the sleeve 2 (end).

[0079] Step S3 has no sequential order with steps S1 and S2. Therefore, the extension direction of the sleeve 3 can be adjusted before and after step S1, and before and after step S2. This makes the adjustment of the sleeve 3 more flexible and makes it easier to align the extension direction of the sleeve 3 with that of the prestressed cable 2. Furthermore, the sleeve 3 has a simple structure, low cost, and low construction difficulty, thus making the photovoltaic bracket 100 and its installation method highly practical.

[0080] Therefore, the photovoltaic bracket 100 according to the embodiments of the present invention has the advantages of low cost, high practicality and long service life.

[0081] Therefore, the photovoltaic bracket 100 installation method according to the embodiments of the present invention has the advantages of low construction difficulty, high practicality and long service life of photovoltaic bracket 100.

[0082] The installation method of the photovoltaic bracket 100 according to an embodiment of the present invention will be specifically described below with reference to the photovoltaic bracket 100 according to an embodiment of the present invention. For example Figures 1 to 4 As shown, the photovoltaic support 100 according to an embodiment of the present invention includes an end column, a prestressed cable 2, a sleeve 3, and a support 1.

[0083] The photovoltaic support 100 has multiple prestressed cable installation positions. Specifically, the end column has a prestressed cable installation position and is used to fix the end of the prestressed cable 2.

[0084] There are multiple sleeves 3 and supports 1, with multiple supports 1 spaced apart and multiple sleeves 3 corresponding to each other on multiple supports 1. Specifically, the multiple supports 1 are spaced apart along the extension direction of the prestressed cable 2 so that the supports 1 can support the prestressed cable 2. The supports 1 have prestressed cable installation positions, and the sleeves 3 are located at the prestressed cable installation positions of the supports 1. The sleeves 3 are straight pipes or bends, and the extension direction of the sleeves 3 is consistent with the extension direction of the prestressed cable 2. For example, the sleeves 3 are steel pipes, and the prestressed cable 2 is a steel cable.

[0085] In some embodiments, the bracket 1 is provided with a fixing plate 4 and a buckle 5, the buckle being snapped onto the fixing plate and fixing the sleeve onto the fixing plate.

[0086] like Figure 1 As shown, in some embodiments, the bracket 1 is provided with a fixing plate 4 and a buckle 5. The buckle 5 is engaged with the fixing plate 4 and can fix the sleeve 3 to the fixing plate 4. Specifically, the fixing plate 4 is provided at the prestressed cable installation position of the bracket 1, and the buckle 5 is detachably installed on the fixing plate 4. Fixing the sleeve 3 with the buckle 5 makes the installation of the sleeve 3 convenient.

[0087] In some embodiments, the ratio of the length dimension of the sleeve 3 to the outer diameter dimension of the sleeve 3 is (8-10):1. The sleeve 3 with a length dimension to outer diameter dimension ratio of (8-10):1 has a preset bearing capacity and can effectively reduce the shear force of the prestressed cable 2. For example, the ratio of the length dimension of the sleeve 3 to the outer diameter dimension of the sleeve 3 is 9:1.

[0088] In some embodiments, the sleeve 3 includes a first segment 31 and a second segment 32 connected together, the lengths of the first segment 31 and the second segment 32 being equal. A snap fastener 5 abuts against the periphery of the connection between the first segment 31 and the second segment 32 of the sleeve 3. The first segment 31 is a straight pipe or a bent pipe, and the second segment 32 is also a straight pipe or a bent pipe. Specifically, the ratio of the length dimension to the outer diameter dimension of the first segment 31 is (4-5):1, and the ratio of the length dimension to the outer diameter dimension of the second segment 32 is (4-5):1. This allows the sleeve 3 to provide more balanced support for the prestressed cable 2 on the support 1. When installing the sleeve 3, the connection between the first segment 31 and the second segment 32 of the sleeve 3 is placed on the fixing plate 4, and then the snap fastener 5 is engaged, with the snap fastener 5 abutting against the periphery of the connection between the first segment 31 and the second segment 32 of the sleeve 3, so that the snap fastener positions the connection between the first segment 31 and the second segment 32 at the prestressed cable installation position on the support 1.

[0089] In some embodiments, a vibration-damping lubricating layer 33 is provided on the inner wall surface of the sleeve 3. The vibration-damping lubricating layer 33 is composed of at least one of a vibration-damping material and a lubricating material. Specifically, the vibration-damping lubricating layer 33 is graphite or polytetrafluoroethylene (PTFE) sheet. Graphite is a commonly used solid lubricant and can play a good lubricating role. PTFE sheet has the characteristics of high temperature resistance, corrosion resistance, and high lubricity. The vibration-damping lubricating layer 33 can reduce the friction coefficient between the sleeve 3 and the prestressed cable 2. The friction coefficient between the steel (sleeve 3 without vibration-damping lubricating layer 33) and the steel (prestressed cable 2) is 0.15; the friction coefficient between the vibration-damping lubricating layer 33 (PTFE sheet) and the steel (prestressed cable 2) is 0.1. The normal pressure from the sleeve 3 on the prestressed cable 2 remains unchanged, so the ratio of frictional forces is the same as the ratio of friction coefficients. The ratio of frictional forces between the sleeve 3 without vibration-damping lubricating layer 33 and the sleeve 3 with vibration-damping lubricating layer 33 is 3:2, so the ratio of prestress loss is also 3:2. Therefore, after adding the vibration damping and lubrication layer 33, the prestress loss of the prestressed cable 2 was reduced by 33%.

[0090] The photovoltaic bracket 100 installation method according to an embodiment of the present invention includes the following steps:

[0091] In step S1, the sleeve 3 is placed on the bracket 1.

[0092] The photovoltaic support 100 has multiple prestressed cable installation positions, including a first position 101, a second position 102, and a third position 103 arranged sequentially along the extension direction of the prestressed cable 2. The second position 102 is located on the support 1, and the sleeve 3 is disposed on the second position 102 of the support 1. Specifically, the position for fixing the prestressed cable 2 is the prestressed cable installation position. The first position 101 and the third position 103 can be located on the support 1 or on the end post. The support 1 is used to fix the middle part of the prestressed cable 2, and the end post is used to fix the end of the prestressed cable 2. For example, the first position 101, the second position 102, and the third position 103 are all disposed on the support 1.

[0093] like Figures 1 to 3As shown, the connecting portion of the first segment 31 and the second segment 32 is located at the second position 102 on the support 1. The first segment 31 is located between the second segment 32 and the first position 101 in the extension direction of the prestressed cable 2, and the second segment 32 is located between the first segment 31 and the third position 103 in the extension direction of the prestressed cable 2. The central axis of the first segment 31 has a first end 311 and a second end 312. The first end 311 is the end of the central axis of the first segment 31 away from the second position 102 (second segment 32), and the second end 312 is located at the second position 102. The central axis of the second segment 32 has a third end 321 and a fourth end 322. The third end 321 is located at the second position 102, and the fourth end 322 is the end of the central axis of the second segment 32 away from the second position 102 (first segment 31). Specifically, both the second end 312 and the third end 321 are located at the second position 102, that is, the second end 312 and the third end 321 coincide.

[0094] like Figure 1 As shown, in some embodiments, the sleeve 3 is positioned at the second position 102 (the position where the prestressed cable 2 is installed) of the bracket 1 by means of the fixing plate 4 and the buckle 5 on the bracket 1.

[0095] In some embodiments, the connecting portion of the first segment 31 and the second segment 32 is welded to the second position 102 on the bracket 1.

[0096] In step S2, the prestressed cable 2 is inserted into the sleeve 3 so that the sleeve 3 can support the prestressed cable 2.

[0097] Specifically, after the sleeve 3 is fixed on the bracket 1, one end of the prestressed cable 2 is fixed on the end post, and the other end of the prestressed cable 2 passes through the sleeves 3 on multiple brackets 1 in sequence (and is tensioned) and is then fixed on the other end post.

[0098] S3. Adjust the sleeve 3 so that its extension direction matches the extension direction of the prestressed cable 2. Step S3 has no sequential order with steps S1 and S2.

[0099] In some embodiments, step S1 is performed after step S3 is performed, so that the direction of the prestressed cable 2 can be estimated based on the positional relationship between the first position 101, the second position 102 and the third position 103, thereby setting the extension direction of the sleeve 2 on the support 1.

[0100] And / or, step S3 is performed between step S1 and step S2, that is, after the sleeve 3 is placed on the bracket 1, according to the positional relationship between the first position 101, the second position 102 and the third position 103;

[0101] And / or, after completing step S2, perform step S3, that is, after the prestressed cable 2 is inserted into the sleeve, the extension direction of the sleeve 3 can be adjusted according to the actual state of the prestressed cable 2 so that the prestressed cable 2 can easily fit the inner wall surface of the sleeve 3.

[0102] In other words, step S3 can be implemented before or after steps S1 and S2 are completed, so that the extension direction of the sleeve 3 is consistent with the extension direction of the prestressed cable 2. Specifically, step S3 can be implemented multiple times. Before step S1, the extension direction of the sleeve 2 on the support 1 can be set according to the estimated direction of the prestressed cable 2 between the first position 101, the second position 102 and the third position 103, so that the sleeve can easily insert the prestressed cable 2 after it is installed on the support 1. After the prestressed cable 2 is inserted into the sleeve 3, the extension direction of each part of the sleeve 3 is adjusted again according to the actual situation of the prestressed cable 2.

[0103] The sleeve 3 is a straight pipe extending horizontally. When the first position 101, the second position 102, and the third position 103 are arranged at the same height and on the same horizontal straight line, there is no need to bend the sleeve 3. For example, the sleeve 3 extends in the left-right direction, and the first segment 31 is located to the left of the second end 32.

[0104] The support frame 1 includes a first support 11, a second support 12, and a third support 13, arranged sequentially from left to right. The first position 101 is located at the top of the first support 11, the second position 102 is located at the top of the second support 12, and the third position 103 is located at the top of the third support 13. That is, the height difference between the first support 11, the second support 12, and the third support 13 represents the height difference between the first position 101, the second position 102, and the third position 103. The left-right direction is shown by the arrows in the figure.

[0105] In step S3, when the second position 102 has a height difference with at least one of the first position 101 and the third position 103, and / or when the first position 101, the second position 102, and the third position 103 are not on the same horizontal line, at least a portion of the sleeve 3 is bent. That is, when one or both of these conditions occur—that the second position 102 has a height difference with at least one of the first position 101 and the third position 103, and that the first position 101, the second position 102, and the third position 103 are not on the same horizontal line—at least a portion of the sleeve 3 is bent. For example, when one or both of these conditions occur—that the second support 12 has a different height from at least one of the first support 11 and the third support 13, and that the second support 12 is not on the same horizontal line—at least a portion of the sleeve 3 is bent.

[0106] In some embodiments, the tangent at the first end 311 of the central axis of the first segment 31 is parallel to the straight line connecting the first position 101 and the second position 102. That is, the extension direction of the first end 311 of the central axis of the bent first segment 31 is consistent with the extension direction of the straight line connecting the first position 101 and the second position 102. This allows the extension direction of the prestressed cable 2 extending outward from the first segment 31 (first end 311) to match the straight line connecting the first position 101 and the second position 102. This makes it easy for at least a portion of the prestressed cable 2 adjacent to the second position 102 to fit within the first segment 31 of the sleeve 3, thereby reducing the likelihood of wear between the prestressed cable 2 within the first segment 31 (first end 311) and the first segment 31 of the sleeve 3. For example, the first position 101 and the second position 102 have a height difference, and the angle of inclination of the straight line connecting the first position 101 and the second position 102 with the horizontal plane is the same as the angle of inclination of the tangent at the first end 311 of the central axis of the first segment 31 with the horizontal plane.

[0107] The tangent at the fourth end 322 of the central axis of the second segment 32 is parallel to the straight line connecting the third position 103 and the second position 102. That is, the extension direction of the fourth end 322 of the central axis of the bent second segment 32 is consistent with the extension direction of the straight line connecting the third position 103 and the second position 102. This allows the extension direction of the prestressed cable 2 extending outward from the second segment 32 (fourth end 322) to match the straight line connecting the third position 103 and the second position 102. This makes it easy for at least a portion of the prestressed cable 2 adjacent to the second position 102 to fit within the second segment 32 of the sleeve 3, thus preventing wear between the prestressed cable 2 within the second segment 32 (fourth end 322) and the second segment 32 of the sleeve 3. For example, when there is a height difference between the third position 103 and the second position 102, the angle of inclination of the straight line connecting the third position 103 and the second position 102 to the horizontal plane is the same as the angle of inclination of the tangent at the fourth end 322 of the central axis of the second segment 32 to the horizontal plane.

[0108] In some embodiments, the central axis of the first segment 31 is an arc, and / or the central axis of the second segment 32 is an arc. The central axis of the first segment 31 being an arc, and / or the central axis of the second segment 32 being an arc, includes: a. the central axis of the first segment 31 is an arc; b. the central axis of the second segment 32 is an arc; c. the central axis of both the first segment 31 and the second segment 32 are arcs. That is, the central axes of the first segment 31 and the second segment 32 can be arcs, thereby making it easier for the prestressed cable 2 to fit against the inner wall surface of the sleeve 3.

[0109] In some embodiments, the central axis of the first segment 31 is a first circular arc, which satisfies the formula: r1=180L1 / θ1π.

[0110] Where r1 is the radius of the first arc, L1 is the length of the central axis of the first segment 31, θ1 is the angle of the first included angle, the angle (inclination angle) between the straight line connecting the first position 101 and the second position 102 and the horizontal plane is the first included angle, or the angle between the straight line connecting the first position 101 and the second position 102 and the straight line connecting the second position 102 and the third position is the first included angle.

[0111] L1 = θ1πr1 / 180, where L1 is the length of the central axis of the first segment 31. The first included angle θ1 is the angle (inclination angle) between the tangent at the first end 311 of the central axis of the first segment 31 (the straight line connecting the first position 101 and the second position 102) and the horizontal plane, or the first included angle θ1 is the angle between the tangent at the first end 311 of the central axis of the first segment 31 (the straight line connecting the first position 101 and the second position 102) and the straight line connecting the second position 102 and the third position.

[0112] Specifically, when there is a height difference between the first position 101 and the second position 102, the center of the first arc is located directly above or below the second position 102, and the first included angle θ1 is the angle (inclination angle) between the straight line connecting the first position 101 and the second position 102 and the horizontal plane. When the first position 101 and the second position 102 are at the same horizontal height, and the second position 102 and the first position 101 are on the first horizontal straight line, and the second position 102 and the third position 103 are on the second horizontal straight line, and the first horizontal straight line intersects the second horizontal straight line, the center of the first arc is located on the horizontal perpendicular line of the second horizontal straight line passing through the second position 102, and the first included angle θ1 is the angle between the straight line connecting the first position 101 and the second position 102 (the first horizontal straight line) and the straight line connecting the second position 102 and the third position (the second horizontal straight line). The value of r1 can be obtained from the values ​​of the first included angle θ1 and L1, thereby determining the trajectory of the first arc, and further determining the extension direction of the first segment 31 (the central axis), that is, the bending path of the first segment 31.

[0113] In some embodiments, the central axis of the second segment 32 is a second circular arc, which satisfies the formula: r2=180L2 / θ2π.

[0114] Where r2 is the radius of the second arc, L2 is the length of the central axis of the second segment 32, θ2 is the angle of the second included angle, the angle between the line connecting the third position 103 and the second position 102 and the horizontal plane is the second included angle, or the angle between the line connecting the third position 103 and the second position 102 and the line connecting the second position 102 and the first position 101 is the second included angle.

[0115] L2 = θ2πr2 / 180, where L2 is the length of the central axis of the second segment 32. The second included angle θ2 is the angle between the tangent at the fourth end 322 of the central axis of the second segment 32 (the straight line connecting the third position 103 and the second position 102) and the horizontal plane, or, the second included angle θ2 is the angle between the tangent at the fourth end 322 of the central axis of the second segment 32 (the straight line connecting the third position 103 and the second position 102) and the straight line connecting the second position 102 and the first position.

[0116] Specifically, when there is a height difference between the third position 103 and the second position 102, the center of the second arc is located directly above or below the second position 102, and the second included angle θ2 is the angle (inclination angle) between the straight line connecting the third position 103 and the second position 102 and the horizontal plane. When the third position 103 and the second position 102 are at the same horizontal height, and the second position 102 and the first position 101 are on the first horizontal straight line, and the second position 102 and the third position 103 are on the second horizontal straight line, and the first horizontal straight line intersects the second horizontal straight line, the center of the second arc is located on the horizontal perpendicular line passing through the first horizontal straight line of the second position 102, and the second included angle θ2 is the angle between the straight line connecting the third position 103 and the second position 102 (the second horizontal straight line) and the straight line connecting the second position 102 and the first position (the first horizontal straight line). The value of r2 can be obtained from the values ​​of the second included angle θ2 and L2, thereby determining the trajectory of the second arc, and further determining the extension direction of the second segment 32 (the central axis), that is, the bending path of the second segment 32.

[0117] In some embodiments, the central axis of the first segment 31 is parabolic, and / or the central axis of the second segment 32 is parabolic. The central axis of the first segment 31 being parabolic, and / or the central axis of the second segment 32 being parabolic, includes: a. the central axis of the first segment 31 is parabolic; b. the central axis of the second segment 32 is parabolic; c. both the central axis of the first segment 31 and the central axis of the second segment 32 are parabolic. That is, the central axes of the first segment 31 and the second segment 32 can be parabolic, thereby making it easier for the prestressed cable 2 to fit against the inner wall surface of the sleeve 3.

[0118] In some embodiments, the central axis of the first segment 31 extends along the extension direction of the first parabola, and the first parabola satisfies

[0119] Formula: y=a1x 2 ;

[0120] The length of the central axis of the first segment 31 satisfies the formula:

[0121] In this system, the vertex and origin of the first parabola are both at position 102. x is the abscissa of the first parabola, a1 is a constant of the first parabola, y is the ordinate of the first parabola, l1 is the length of the central axis of the first segment 31, and x1 is the length of the central axis of the first segment 31 on the abscissa. The abscissa of the first parabola extends in the same direction as the projection of the straight line connecting positions 101 and 102 onto the horizontal plane. The ordinate of the first parabola extends in the same direction as the vertical direction, or both the abscissa and ordinate of the first parabola are horizontal and perpendicular to each other.

[0122] l1 is the length of the central axis of the first segment 31, that is, l1 is the length of the first segment 31.

[0123] When there is a height difference between the first position 101 and the second position 102, the extension direction of the horizontal axis of the first parabola is consistent with the extension direction of the projection of the straight line connecting the first position and the second position onto the horizontal plane, the extension direction of the vertical axis of the first parabola is consistent with the up and down direction, the opening direction of the first parabola is towards the upper side or towards the lower side, and the focus of the first parabola is located directly above or directly below the second position 102.

[0124] When the first position 101 and the second position 102 are at the same horizontal height, the extension directions of the horizontal axis and the vertical axis of the first parabola are both horizontal and perpendicular to each other. The first position 101 and the second position 102 are spaced apart in both directions. The opening of the first parabola is in the direction of the vertical axis extension, from the second position 102 towards the first position 101. The focus of the first parabola is located between the first position 101 and the second position 102 in the direction of the vertical axis extension.

[0125] The tangent at the first end 311 of the central axis of the first segment 31 is parallel to the straight line connecting the first position 101 and the second position 102. The angle between the straight line connecting the first position 101 and the second position 102 and the horizontal axis is θ1. Therefore, the slope of the tangent at the first end 311 of the central axis of the first segment 31 can be obtained using the formula y = a1x. 2 The derivative function can be obtained, and the equation of the tangent line can be obtained using the coordinates of the point at the first end 311 of the central axis of the first segment 31 and the formula y = a1x. 2 The derivatives of are expressed together.

[0126] Given the initial x-coordinate value x1 of the first end 311, substitute it with the slope of the tangent line passing through the first end 311 and the formula y = a1x 2 The slope of the tangent line is determined by the derivative function of the tangent line. The value of a1 can be obtained from the equation consisting of the two equations. Then, substituting this into the formula y = a1x... 2 Once the ordinate of the first end 311 is obtained, the equation of the parabola is known.

[0127] Then, according to the formula: Find the length of the parabola l1. If the length of l1 is between 4 and 5 times the outer diameter of the casing, then the equation of the parabola at this point is the first parabola equation. If it is not between 4 and 5 times the outer diameter of the casing, readjust the value of x1 and continue iterating. Determine whether to continue iterating based on the iteration results until l1 is between 4 and 5 times the outer diameter of the casing. The equation of the parabola at this point is the first parabola equation.

[0128] In some embodiments, the central axis of the second segment 32 extends along the extension direction of the second parabola, and the second parabola satisfies the formula: y = a²x 2 ;

[0129] The length of the central axis of the second segment 32 satisfies the formula:

[0130] In this system, the vertex and origin of the second parabola are both at position 102. x is the abscissa of the second parabola, a2 is a constant of the second parabola, y is the ordinate of the second parabola, l2 is the length of the central axis of the second segment 32, x2 is the length of the central axis of the second segment 32 on the abscissa, the extension direction of the abscissa of the second parabola is consistent with the extension direction of the projection of the straight line connecting the third position and the second position onto the horizontal plane, the extension direction of the ordinate of the second parabola is consistent with the up and down direction, or the extension direction of the abscissa of the second parabola and the extension direction of the ordinate of the second parabola are both horizontal and perpendicular to each other.

[0131] l2 is the length of the central axis of the second segment 32, that is, l2 is the length of the second segment 32.

[0132] When there is a height difference between the third position 103 and the second position 102, the extension direction of the horizontal axis of the second parabola is consistent with the extension direction of the projection of the straight line connecting the first position and the second position onto the horizontal plane, the extension direction of the vertical axis of the second parabola is consistent with the up and down direction, the opening direction of the second parabola is towards the upper side or towards the lower side, and the focus of the second parabola is located directly above or directly below the second position 102.

[0133] When the third position 103 and the second position 102 are at the same horizontal height, the extension directions of the horizontal axis and the vertical axis of the second parabola are both horizontal and perpendicular to each other. The third position 103 and the second position 102 are spaced apart in both directions. The opening of the second parabola is in the direction of the vertical axis extension, from the second position 102 towards the third position 103. The focus of the second parabola is located between the third position 103 and the second position 102 in the direction of the vertical axis extension.

[0134] The tangent at the fourth end 322 of the central axis of the second segment 32 is parallel to the straight line connecting the third position 103 and the second position 102. The angle between the straight line connecting the third position 103 and the second position 102 and the horizontal axis is θ2. Therefore, the angle between the tangent at the fourth end 322 of the central axis of the second segment 32 and the horizontal axis is θ2. From this, the slope of the tangent at the fourth end 322 of the central axis of the second segment 32 can be obtained. The slope of the tangent can also be expressed by the formula y = a²x. 2 The derivative function can be obtained, and the equation of the tangent line can be obtained using the coordinates of the point at the fourth end (322) of the central axis of the second segment (32) and the formula y = a²x. 2 The derivatives of are expressed together.

[0135] Given the initial x-coordinate of the fourth end 322 as x2, substitute it with the slope of the tangent line passing through the fourth end 322 and the formula y = a2x 2 The slope of the tangent line is determined by the derivative of the function. The value of a² can be obtained from the equation consisting of the two equations. Then, substituting this into the formula y = a²x... 2 Once the ordinate of the fourth end 322 is obtained, the equation of the parabola is known.

[0136] Then, according to the formula: Find the length of the parabola l2. If the length of l2 is between 4 and 5 times the outer diameter of the casing, then the equation of the parabola at this point is the equation of the second parabola. If it is not between 4 and 5 times the outer diameter of the casing, readjust x2 and continue iterating. Determine whether to continue iterating based on the iteration results until l2 is between 4 and 5 times the outer diameter of the casing. The equation of the parabola at this point is the equation of the second parabola.

[0137] Specifically, when there is a height difference between the second position 102 and the first position 101, and / or when the extension direction of the first segment 31 is inconsistent with the extension direction of the horizontal line where the second position 102 and the first position 101 are located, the first segment 31 is bent, and the first end 311 is moved in a direction adjacent to the first position 101. Specifically, the tangent at the first end 311 of the central axis of the bent first segment 31 is parallel to the straight line connecting the first position 101 and the second position 102. For example, when one or both of the following situations occur—a height difference between the second support 12 and the first support 11, and the extension direction of the first segment 31 being inconsistent with the extension direction of the horizontal line where the second support 12 and the first support 11 are located—the first segment 31 is bent, and the first end 311 is moved in a direction adjacent to the first position 101, so that the extension direction of the first segment 31 is adapted to the extension direction of the portion of the prestressed cable 2 located between the first position 101 and the second position 102.

[0138] When there is a height difference between the second position 102 and the third position 103, and / or when the extension direction of the second segment 32 is not consistent with the extension direction of the horizontal line where the second position 102 and the third position 103 are located, the second segment 32 is bent, and the fourth end 322 is moved in a direction adjacent to the third position 103. Specifically, the tangent at the fourth end 322 of the central axis of the second segment 32 is parallel to the straight line connecting the third position 103 and the second position 102. For example, when one or both of the following situations occur—a height difference between the second support 12 and the third support 13, and an extension direction of the second segment 32 not consistent with the extension direction of the horizontal line where the second support 12 and the third support 13 are located—the second segment 32 is bent, and the fourth end 322 is moved in a direction adjacent to the third position 103, so that the extension direction of the second segment 32 is adapted to the extension direction of the portion of the prestressed cable 2 located between the third position 103 and the second position 102.

[0139] When the second position 102 has a height difference from the first position 101, and / or the extension direction of the first segment 31 is inconsistent with the extension direction of the horizontal line where the second position 102 and the first position 101 are located, including:

[0140] a1. When the first position 101, the second position 102, and the third position 103 are on the same horizontal straight line and the second position 102 has a height difference with the first position 101, the first segment 31 is bent in the vertical direction, so that the first end 311 is located between the first position 101 and the second end 312 (second position 102) in the vertical direction. That is, the extension direction of the sleeve 3 in the horizontal direction can be set to be consistent with the extension direction of the horizontal line where the first position 101, the second position 102, and the third position 103 are located. The first segment 31 is bent in the vertical direction, so that the first end 311 of the first segment 31 moves towards the first position 101 in the vertical direction. For example, the first bracket 11, the second bracket 12, and the third bracket 13 are arranged sequentially on a straight line extending in the left and right direction (e.g. Figure 3 As shown, if the first support 11 (first position 101) is higher than the second support 12 (second position 102), then the first segment 31 is bent upwards, and the bent first end 311 is located above the second end 312. The tangent at the first end 311 of the central axis of the bent first segment 31 is parallel to the straight line connecting the first position 101 and the second position 102. The central axis of the bent first segment 31 is a first arc with its center located directly above the second position 102; or, the central axis of the bent first segment 31 extends along the extension direction of the first parabola, at which point the horizontal axis of the first parabola extends in the left-right direction, the vertical axis of the first parabola extends in the up-down direction, and the focus of the first parabola is located directly above the second position 102.

[0141] a2. When the first position 101, the second position 102, and the third position 103 are on the same horizontal line and there is a height difference between the second position 102 and the third position 103, the second segment 32 is bent in the vertical direction, so that the fourth end 322 is located between the third position 103 and the third end 321 (second position 102) in the vertical direction. That is, the extension direction of the sleeve 3 in the horizontal direction can be set to be consistent with the extension direction of the horizontal line where the first position 101, the second position 102, and the third position 103 are located. The second segment 32 is bent in the vertical direction, so that the fourth end 322 of the second segment 32 moves towards the third position 103 in the vertical direction. For example, if the first bracket 11, the second bracket 12, and the third bracket 13 are arranged sequentially on a straight line extending in the left and right direction, and the third bracket 13 (third position 103) is higher than the second bracket 12 (second position 102), then the second segment 32 is bent upward, and the bent fourth end 322 is located above the third end 321. The tangent at the fourth end 322 of the central axis of the bent second segment 32 is parallel to the straight line connecting the third position 103 and the second position 102. The central axis of the bent second segment 32 is a second arc with its center located directly above the second position 102; or, the central axis of the bent second segment 32 extends along the extension direction of the second parabola, at which point the horizontal axis of the second parabola extends in the left-right direction, the vertical axis of the second parabola extends in the up-down direction, and the focus of the first parabola is located directly above the second position 102.

[0142] b1. The first position 101, the second position 102, and the third position 103 are at the same horizontal height. The second position 102 and the first position 101 are on the first horizontal straight line, and the second position 102 and the third position 103 are on the second horizontal straight line. When the first horizontal straight line intersects the second horizontal straight line, the extension direction of the sleeve 3 (the first segment 31 and the second segment 32) is set to the extension direction of the first horizontal straight line. The second segment 32 is bent in the horizontal direction, and the fourth end 322 is located between the third end 321 (the second position 102) and the third position 103 in a direction perpendicular to the first horizontal straight line.

[0143] Specifically, when the angle between the first horizontal line and the second horizontal line is greater than 90°, the extension direction of the first segment 31 is set (placed) to be the extension direction of the first horizontal line, and the second segment 32 is bent in the horizontal direction. The tangent at the first end 311 of the central axis of the bent first segment 31 is parallel to the straight line connecting the first position 101 and the second position 102. For example, the extension direction of the sleeve 3 (the first segment 31 and the second segment 32) is set to the left and right direction, the second segment 32 is bent in the horizontal direction, and the fourth end 322 is located between the third end 321 (the second position 102) and the third position 103 in the front-back direction.

[0144] b2. The first position 101, the second position 102, and the third position 103 are at the same horizontal height. The second position 102 and the first position 101 are on a first horizontal straight line, and the second position 102 and the third position 103 are on a second horizontal straight line. When the first horizontal straight line intersects the second horizontal straight line, the extension direction of the sleeve 3 (the first segment 31 and the second segment 32) is set to the extension direction of the second horizontal straight line. The first segment 31 is bent in the horizontal direction, and the first end 311 is located between the second end 312 (the second position 102) and the first position 101 in a direction perpendicular to the second horizontal straight line. Specifically, when the angle between the first horizontal straight line and the second horizontal straight line is greater than 90°, the extension direction of the second segment 32 is set (placed) to the extension direction of the second horizontal straight line. The first segment 31 is bent in the horizontal direction, and the tangent at the first end 311 of the central axis of the bent first segment 31 is parallel to the straight line connecting the first position 101 and the second position 102. For example, the extension direction of the sleeve 3 (first segment 31 and second segment 32) is set to the front-back direction, the first segment 31 is bent in the horizontal direction, and the first end 311 is located between the second end 312 (second position 102) and the first position 101 in the left-right direction.

[0145] b3. When the first position 101, the second position 102, and the third position 103 are at the same horizontal height, the second position 102 and the first position 101 are on the first horizontal straight line, and the second position 102 and the third position 103 are on the second horizontal straight line, and the first horizontal straight line intersects the second horizontal straight line, the first segment 31 and the second segment 32 are bent such that the fourth end 322 is located between the third end 321 and the third position 103 in a direction perpendicular to the first horizontal straight line, and the first end 311 is located between the second end 312 and the first position 101 in a direction perpendicular to the second horizontal straight line. Specifically, when the angle between the first horizontal straight line and the second horizontal straight line is less than or equal to 90°, the first segment 31 and the second segment 32 are bent such that the tangent at the first end 311 of the central axis of the bent first segment 31 is parallel to the straight line connecting the first position 101 and the second position 102, and the tangent at the fourth end 322 of the central axis of the bent second segment 32 is parallel to the straight line connecting the third position 103 and the second position 102.

[0146] For example, the first horizontal straight line extends in the left-right direction, the second horizontal straight line extends in the front-back direction, the extension direction of the sleeve 3 (first segment 31 and second segment 32) is set to intersect the front-back direction and the left-right direction, the first segment 31 and the second segment 32 are bent in the horizontal direction, and the first end 311 is located between the second end 312 (second position 102) and the first position 101 in the left-right direction, and the fourth end 322 is located between the third end 321 (second position 102) and the third position 103 in the front-back direction. The central axis of the first segment 31 after bending is the first arc, and at this moment the center position, sleeve 3 and bracket 1 are arranged sequentially on the same horizontal straight line (optionally, the angle between the horizontal straight line where the center position, sleeve 3 and bracket 1 are located and the first horizontal straight line and the second horizontal straight line is 45°); or, the central axis of the first segment 31 after bending extends along the extension direction of the first parabola, and at this moment the focus of the first parabola, sleeve 3 and bracket 1 are arranged sequentially on the same horizontal straight line (optionally, the angle between the horizontal straight line where the focus of the first parabola, sleeve 3 and bracket 1 are located and the first horizontal straight line and the second horizontal straight line is 45°).

[0147] c1. When the second position 102 and the first position 101 are on a first horizontal line, and the second position 102 and the third position 103 are on a second horizontal line, the first horizontal line intersects the second horizontal line, and there is a height difference between the second position 102 and the first position 101, the first segment 31 is bent so that the first end 311 is located between the first position 101 and the second end 312 in the vertical direction, and the first end 311 is located between the second end 312 (second position 102) and the first position 101 in the direction perpendicular to the second horizontal line. The tangent at the first end 311 of the central axis of the bent first segment 31 is parallel to the straight line connecting the first position 101 and the second position 102. For example, when the first position 101 is in front of and above the second position 102, the first segment 31 is bent towards the front and upper side so that the first end 311 is above the second end 312, and the first end 311 is in front of the second end 312 (second position 102).

[0148] c2. When the second position 102 and the first position 101 are on a first horizontal line, and the second position 102 and the third position 103 are on a second horizontal line, the first horizontal line intersects the second horizontal line, and there is a height difference between the second position 102 and the third position 103, the second segment 32 is bent so that the fourth end 322 is located between the third position 103 and the third end 321 in the vertical direction, and the fourth end 322 is located between the third end 321 (second position 102) and the third position 103 in the direction perpendicular to the first horizontal line. The tangent at the fourth end 322 of the central axis of the bent second segment 32 is parallel to the straight line connecting the third position 103 and the second position 102. For example, when the third position 103 is in front of and above the second position 102, the second segment 32 is bent towards the front and upper side so that the fourth end 322 is above the third end 321, and the fourth end 322 is in front of the second end 312 (second position 102).

[0149] In general, the first segment 31 is bent in the direction of the straight line connecting the first position 101 and the second position 102, so that the portion of the prestressed cable 2 near the second position 102 between the first position 101 and the second position 102 can easily fit into the first segment 31 at least partially located at the second position 102. The second segment 32 is bent in the direction of the straight line connecting the third position 103 and the second position 102, so that the portion of the prestressed cable 2 near the second position 102 between the third position 103 and the second position 102 can easily fit into the second segment 32 at least partially located at the second position 102. This results in a large contact area between the sleeve 3 and the prestressed cable 2, making it easier for the sleeve 3 to support the prestressed cable 2 and reducing the shear force on the prestressed cable 2 at the support 1, thereby reducing damage to the prestressed cable 2 at the support 1 and improving the service life of the prestressed cable.

[0150] like Figures 4 to 8 As shown, a finite element model of the steel cable bearing tensile load was established, and the bending of the steel cable under the installation of the sleeve 3 ( Figure 5 ) and only steel cable clips ( Figure 6 The maximum shear force of the cable section under two working conditions was determined. The material properties of the cable in the model were added according to the actual situation. The cable dimensions were consistent with the actual working conditions: 1×7 prestressed steel strand with a diameter of 15.2mm, sleeve 3 with an inner diameter of 15.2mm and a length of 152mm, and a clip with an inner diameter of 15.2mm and a length of 20mm. C3D8R elements were used, with a tensile force of 10kN applied at the loading point, and fixed constraints applied at the fixed end, as well as at the bending points of the sleeve and clip. Stress cloud diagrams were obtained from the finite element results (…). Figure 7 and Figure 8As can be seen, the cable is subjected to more uniform stress after adding the cable bending sleeve. By extracting the maximum shear force of the cable cross-section, the maximum shear force of the cross-section after adding the cable bending sleeve is 2.129 kN, while the maximum shear force of the cross-section with only the cable clip is 5.392 kN. Compared with the case with only the clip, the maximum shear force of the cable cross-section is reduced by 61% after adding the cable bending sleeve. Therefore, the finite element results show that adding the cable bending sleeve can significantly reduce the shear force borne by the cable, and the cable bending sleeve can play its role effectively.

[0151] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0152] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0153] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0154] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0155] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0156] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A method for installing a photovoltaic support structure, characterized in that, The photovoltaic support system includes prestressed cables, sleeves, and brackets. The photovoltaic support system installation method includes the following steps: S1. Place the sleeve on the bracket; S2. Insert the prestressed cable into the sleeve so that the sleeve can support the prestressed cable; S3. Adjust the sleeve so that the extension direction of the sleeve matches the extension direction of the prestressed cable. The steps S3 and S1 and S2 are not sequential; The sleeve is a straight tube extending in the horizontal direction; The photovoltaic support has multiple prestressed cable installation positions, including a first position, a second position, and a third position arranged sequentially along the extension direction of the prestressed cable. The second position is located on the support, and the sleeve is provided at the second position of the support. In step S3, when the second position has a height difference with at least one of the first position and the third position, and / or when the first position, the second position and the third position are not on the same horizontal line, at least a portion of the sleeve is bent. The sleeve includes a first section and a second section connected together. The connection between the first section and the second section is located at the second position on the support. The first section is located between the second section and the first position in the extension direction of the prestressed cable. The second section is located between the first section and the third position in the extension direction of the prestressed cable. The central axis of the first section has a first end and a second end. The first end is the end of the central axis of the first section away from the second position, and the second end is located at the second position. The central axis of the second section has a third end and a fourth end. The third end is located at the second position, and the fourth end is the end of the central axis of the second section away from the second position. In step S3, When the second position has a height difference with the first position, and / or the extension direction of the first segment is inconsistent with the extension direction of the horizontal line where the second position and the first position are located, the first segment is bent, and the first end is moved in a direction adjacent to the first position. When the second position and the third position have a height difference, and / or when the extension direction of the second segment is not consistent with the extension direction of the horizontal line where the second position and the third position are located, the second segment is bent, and the fourth end moves in a direction adjacent to the third position. The tangent at the first end of the central axis of the first segment is parallel to the straight line connecting the first position and the second position; The tangent at the fourth end of the central axis of the second segment is parallel to the straight line connecting the third position and the second position; The central axis of the first segment is an arc, and / or the central axis of the second segment is an arc.

2. The photovoltaic bracket installation method according to claim 1, characterized in that, After completing step S3, step S1 is performed. And / or, step S3 is performed between step S1 and step S2; And / or, perform step S3 after performing step S2.

3. The photovoltaic bracket installation method according to claim 1, characterized in that, In step S3, When the first position, the second position, and the third position are on the same horizontal straight line and the second position has a height difference with the first position, the first segment is bent in the vertical direction, and the first end is located between the first position and the second end in the vertical direction. When the first position, the second position, and the third position are on the same horizontal straight line and the second position and the third position have a height difference, the second segment is bent in the vertical direction, and the fourth end is located between the third position and the third end in the vertical direction.

4. The photovoltaic bracket installation method according to claim 1, characterized in that, In step S3, when the first position, the second position, and the third position are at the same horizontal level, the second position and the first position are on a first horizontal line, the second position and the third position are on a second horizontal line, and the first horizontal line intersects the second horizontal line, The extension direction of the sleeve is set to the extension direction of the first horizontal line, the second segment is bent in the horizontal direction, and the fourth end is located between the third end and the third position in a direction perpendicular to the first horizontal line. Alternatively, the extension direction of the sleeve can be set to the extension direction of the second horizontal line, the first segment can be bent in the horizontal direction, and the first end can be located between the second end and the first position in a direction perpendicular to the second horizontal line. Alternatively, the first and second segments can be bent such that the fourth end is located between the third end and the third position in a direction perpendicular to the first horizontal line, and the first end is located between the second end and the first position in a direction perpendicular to the second horizontal line.

5. The photovoltaic bracket installation method according to claim 1, characterized in that, In step S3, the second position and the first position are on a first horizontal line, the second position and the third position are on a second horizontal line, and the first horizontal line intersects the second horizontal line. When there is a height difference between the second position and the first position, the first segment is bent so that the first end is located between the first position and the second end in the vertical direction, and the first end is located between the second end and the first position in the direction perpendicular to the second horizontal line. When there is a height difference between the second position and the third position, the second segment is bent so that the fourth end is located between the third position and the third end in the vertical direction, and the fourth end is located between the third end and the third position in the direction perpendicular to the first horizontal line.

6. The photovoltaic bracket installation method according to claim 1, characterized in that, The central axis of the first segment is the first circular arc, which satisfies the formula: r1=180L1 / θ1π; Where r1 is the radius of the first arc, L1 is the length of the central axis of the first segment, θ1 is the angle of the first included angle, the angle between the straight line connecting the first position and the second position and the horizontal plane is the first included angle, or the angle between the straight line connecting the first position and the second position and the straight line connecting the second position and the three positions is the first included angle. And / or, the central axis of the second segment is the second circular arc, which satisfies the formula: r2=180L2 / θ2π; Where r2 is the radius of the second arc, L2 is the length of the central axis of the second segment, θ2 is the angle of the second included angle, the angle between the straight line connecting the third position and the second position and the horizontal plane is the second included angle, or the angle between the straight line connecting the third position and the second position and the straight line connecting the second position and the first position is the second included angle.

7. The photovoltaic bracket installation method according to claim 1, characterized in that, The central axis of the first segment is parabolic, and / or the central axis of the second segment is parabolic.

8. The photovoltaic bracket installation method according to claim 7, characterized in that, The central axis of the first segment extends along the extension direction of the first parabola, and the first parabola satisfies the formula: y=a1x 2 ; The length of the central axis of the first segment 31 satisfies the formula: Wherein, the vertex and origin of the first parabola are both the second position, x is the abscissa of the first parabola, a1 is the constant of the first parabola, y is the ordinate of the first parabola, l1 is the length of the central axis of the first segment, x1 is the length of the central axis of the first segment on the abscissa, the extension direction of the abscissa of the first parabola is consistent with the extension direction of the projection of the straight line connecting the first position and the second position on the horizontal plane, the extension direction of the ordinate of the first parabola is consistent with the up and down direction, or, the extension direction of the abscissa of the first parabola and the extension direction of the ordinate of the first parabola are both horizontal and perpendicular to each other; And / or, the central axis of the second segment extends along the extension direction of the second parabola, the second parabola satisfying the formula: y=a2x 2 ; The length of the central axis of the second segment satisfies the formula: Wherein, the vertex and origin of the second parabola are both the second position, x is the abscissa of the second parabola, a2 is the constant of the second parabola, y is the ordinate of the second parabola, l2 is the length of the central axis of the second segment, x2 is the length of the central axis of the second segment on the abscissa, the extension direction of the abscissa of the second parabola is consistent with the extension direction of the projection of the straight line connecting the third position and the second position on the horizontal plane, the extension direction of the ordinate of the second parabola is consistent with the up and down direction, or, the extension direction of the abscissa of the second parabola and the extension direction of the ordinate of the second parabola are both horizontal and perpendicular to each other.

9. The photovoltaic bracket installation method according to claim 2, characterized in that, There are multiple sleeves and multiple supports, with multiple supports spaced apart. The multiple sleeves are installed on the multiple supports in a one-to-one correspondence, and each support has the installation position of the prestressed cable. The photovoltaic support also includes an end column, which has the installation position of the prestressed cable and is used to fix the end of the prestressed cable.

10. A photovoltaic bracket suitable for the photovoltaic bracket installation method according to any one of claims 1-9, characterized in that, It includes a prestressed cable, a sleeve, and a support. The sleeve is disposed on the support, and the prestressed cable is located inside the sleeve. The extension direction of the sleeve is adapted to the extension direction of the prestressed cable.

11. The photovoltaic support according to claim 10, characterized in that, The bracket is provided with a fixing plate and a buckle. The buckle is engaged with the fixing plate and can fix the sleeve on the fixing plate.

12. The photovoltaic support according to claim 11, characterized in that, The sleeve includes a first section and a second section connected together. The buckle abuts against the periphery of the connection between the first section and the second section of the sleeve. The first section is a straight pipe or a bent pipe, and the second section is a straight pipe or a bent pipe.

13. The photovoltaic support according to claim 12, characterized in that, The length of the first segment is equal to the length of the second segment.

14. The photovoltaic support according to claim 11, characterized in that, The ratio of the length of the sleeve to the outer diameter of the sleeve is (8-10):

1.

15. The photovoltaic support according to claim 10, characterized in that, The inner wall surface of the sleeve is provided with a vibration damping and lubrication layer, which is composed of at least one of a vibration damping material and a lubricating material.

16. The photovoltaic support according to claim 15, characterized in that, The vibration damping and lubrication layer is made of graphite or polytetrafluoroethylene (PTFE) sheet.

17. The photovoltaic support according to claim 10, characterized in that, There are multiple sleeves and multiple supports, with the multiple supports spaced apart, and the multiple sleeves are correspondingly disposed on the multiple supports; The photovoltaic support also includes end posts, which are used to fix the ends of the prestressed cables.

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