Hoisting anti-interference dual verification model construction method for wind turbine generator

Abstract

The invention discloses a hoisting anti-interference dual verification model construction method for a wind turbine generator. A mathematical calculation verification model and a ruler drawing verification model are included. The operation radius of the main crane is obtained through calculation of the mathematical calculation verification model; according to the method, a ruler drawing verification model is established through reverse thinking, a maximum value definition calculation method is reasonably adopted, and key data such as the deflection angle of a cabin, a mechanical station center point and corresponding operation radiuses during hoisting of all parts are quantitatively and accurately determined, so that wind turbine generator equipment can be safely, rapidly and accurately installed in place, and the working efficiency is improved. The problem that the heavy large impeller is high in hoisting difficulty is solved, the structure is rigorous and reasonable, safety and reliability are achieved, and calculation operation is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine installation, and in particular to a method for constructing a double verification model for preventing interference in the installation of a wind turbine. Background Art

[0002] With the development of wind turbines towards large impellers and high power, high-power, large-diameter swept area, and ultra-high tower wind turbines are being put into wind power projects on a large scale and rapidly. After the impeller assembly of such units is installed, the weight of the impeller will increase due to factors such as long blades and heavy hub equipment. When installing wind turbines, a crane (main crane) is required to hoist impellers, hubs and other components. To ensure compliance with safety regulations, the crane must use a smaller working radius so that its arm can be closer to the impeller. However, due to factors such as the complex shape of the impeller and the upward angle of the low-speed shaft of the nacelle, the blades are more offset toward the main hoisting direction of the crane. In addition, the shape of the impeller is relatively complex, such as the blades become longer and the curvature becomes larger due to improved performance, making the safe distance between the hub and blade tip and the anti-resistance rod of the main boom when the impeller is hoisted one of the extremely important control targets.

[0003] In the past, we would control and avoid the interference arm phenomenon as much as possible by increasing the tonnage model of the crane, changing the working condition of the wind turbine pole head, and relying on the rich experience of the on-site lifting staff. This not only wastes the performance of the crane, but also fails to completely prevent and control the risk of equipment lifting interference. Therefore, with the continuous improvement of the construction efficiency, construction quality, and installation accuracy of various components of wind power projects, the above methods can no longer meet the safety requirements of today's wind turbines, and need to be upgraded and improved. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a method for constructing a double verification model for hoisting anti-interference of wind turbines, which can accurately obtain the operating angle, anti-pole distance, operating radius, etc. of the hoisting equipment, and thereby realize the construction of anti-interference hoisting equipment, and finally complete the interference-free construction of the wind turbine set, and ensure the construction safety and efficiency.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a method for constructing a double verification model for anti-interference in the installation of a wind turbine generator set, including a mathematical calculation verification model and a ruler and compass drawing verification model.

[0006] The mathematical calculation verification model includes the following steps:

[0007] SP1. Construct a side view diagram of the main crane after installation based on the main crane that has been determined to be used;

[0008] Determine the main crane rotation center point O, and determine the main crane arm root hinge point A, the main crane arm highest point B and the main crane jib end point C based on the main crane rotation center point O according to the technical parameters of the main crane that has been determined to be used, and the main crane rotation center point O is determined as the reference, and the main crane arm root hinge point A and the main crane arm root hinge point A are on the same horizontal line, and point O, point A, point B, and point C are connected in sequence with straight lines to obtain a side view diagram of the main crane;

[0009] SP2, determine that the projection point of the highest point C of the main crane jib on the extension line of the line connecting the main crane rotation center point O and the main crane jib root hinge point A is the projection point N, the projection point G is the overlapping point of the highest point C of the main crane jib and the projection point N on the ground, the distance between the projection point N and the projection point G is the vertical distance from the main crane jib root hinge point A to the ground, connect point A and point N, point C and point N, point N and point G respectively with straight lines, and the line segments obtained by combining the straight line connection in step SP1 are line segment OA, line segment AB, line segment BC, line segment CN, line segment AN and line segment NG;

[0010] Extend line segment AB, the angle α between the extended line of line segment AB and line segment BC is the angle between the extended main boom and the main boom;

[0011] The lengths of line segment OA, line segment AB, line segment BC, line segment AN and line segment NG, and the angle α can be obtained by consulting the performance manual of the main crane;

[0012] SP3. Connect points A and C with a straight line to obtain line segment AC, and obtain ΔABC and RTΔANC. Use trigonometric functions to find the length of line segment AC. Formula 1 is:

[0013]

[0014] In the formula, ∠ABC=180°-α, ∠ABC is the angle between the main crane boom and the main crane auxiliary boom, and the lengths of line segment AB and line segment BC can be obtained by consulting the performance manual of the main crane;

[0015] SP4. Combine the values ​​of ∠ABC and use trigonometric functions to find ∠BAC. Formula 2 is:

[0016]

[0017] Wherein, the length of line segment BC is obtained by querying the performance manual of the main crane, and the length of line segment AC is obtained by calculation in step SP3;

[0018] SP5. In RTΔANC, the Pythagorean theorem can be used to obtain the calculation formula for line segment AC. Formula 3 is:

[0019]

[0020] Combining Formula 1 and Formula 3, we get Formula 4 for calculating the line segment CN:

[0021]

[0022] The length of line segment CN is the hoisting height corresponding to the operating radius ON of the main crane under this working condition;

[0023] SP6. Combined with formula 4, the formula 5 is obtained by inverse deduction based on trigonometric functions:

[0024]

[0025] SP7. Extend line segment AB and line segment NC compared to point M and obtain RTΔANM. In RTΔANM, the degree of ∠MAN can be calculated by formula 6, which is:

[0026] ∠MAV=∠BAC+∠CAN

[0027] Combining Formula 6, Formula 2 and Formula 5, we get Formula 7:

[0028]

[0029] The rearranged formula 8 is:

[0030] MN=(ON-OA)×Tg(∠MAN)

[0031] SP8. According to the installation drawing of the impeller unit, determine the vertex P of the outer end of the hub after installation. The intersection of the horizontal line passing through point P and the main boom is point Q. Use a straight line to connect point P and point Q to obtain line segments PQ and RTΔQPM. RTΔQPM and RTΔANM are similar triangles. According to the proportionality of similar triangles, the length of line segment PQ is calculated. Formula 9 is:

[0032]

[0033] Combining formula 8, the length of line segment PQ can be calculated;

[0034] SP9. Obtain the distance L1 from the impeller lifting point to the top of the hub according to the technical data of the fan equipment manufacturer. If PQ-L1 ≥ 500mm, it proves that the operating radius ON of the selected main crane meets the safety requirements of the impeller lifting anti-resistance rod;

[0035] The ruler and compass drawing verification model comprises the following steps:

[0036] SP1', according to the technical data of the wind turbine equipment manufacturer, draw a simplified side view of the wind turbine tower, nacelle and hub in proportion, and mark the hub outer end vertex A', i.e. point P in step SP8, the impeller center of gravity projection point B' on the top surface, the tower center of gravity projection point C' on the top surface after erection, the nacelle center of gravity projection point D on the top surface, the blade pitch bearing 9 o'clock azimuth point E, the blade pitch bearing end face center point F, and mark the distance H from the center line of the nacelle to the ground;

[0037] According to the technical data of the wind turbine manufacturer, a simplified overhead view of the wind turbine tower, nacelle and hub is drawn in proportion, and points A', B', C', D, E and F are marked on the simplified overhead view, the outer edge of the blade root is extended to intersect the line connecting point A' and point D at point G', and the distance L2 of a boom width extending from the blade root to the blade tail is marked;

[0038] SP2', according to the main crane that has been determined to be used, draw a top view of the main boom with the maximum shape according to the reduced scale of the wind turbine, mark point J on one vertex of the top view of the boom, mark point I on the other vertex, and make point J and point I on the same horizontal line;

[0039] Draw circle 1 with point J as the center and the safety distance as the radius;

[0040] Draw circle 2 with point I as the center and the distance between point B' and point F + safety distance as the radius;

[0041] SP3', the outer edge of the blade root extends toward the blade tail and becomes tangent to circle 1 at point K, and the other direction of the outer edge of the blade root is perpendicular to the line connecting point A' and point D and intersects at point G'. Connect point K and point G' to obtain a tangent line G'K of circle 1, and make a perpendicular line to tangent line G'K through point G'. Extend the perpendicular line and it will become tangent to circle 2, with the tangent point being point L, and obtain a tangent line G'L of circle 2, that is, tangent line G'K⊥tangent line G'L;

[0042] SP4', in step SP1', the outer edge of the blade root is extended so that it intersects the line connecting point A' and point D at point G' perpendicularly, and point B' and point C' are both located on the line connecting point A' and point D. Therefore, the tangent line G'L substantially coincides with the line connecting point A' and point D, that is, point B' and point C' are both located on the extension line of the tangent line G'L. The distance between point B' and point G', the distance between point B' and point C', and the distance between point C' and point D can be obtained according to the technical data of the wind turbine equipment manufacturer, and accordingly, point B', point C' and point D are marked on the extension line of the tangent line G'L accordingly;

[0043] SP5', combine the top view diagram of the wind turbine in step SP1' with the side view diagram of the main crane in step SP1, determine the position of the nacelle with the vertical distance from the center line of the nacelle to the line segment ON as H, and make the extension line of the line segment CN pass through point B', so as to obtain a combined side view diagram of the wind turbine and the main crane;

[0044] The operating radius R1 of the main crane is marked on the combined side view diagram. The operating radius R1 is actually the line segment ON in the mathematical calculation verification model. The turning radius of the intersection of the center line of the nacelle and the front edge of the main boom is R2. The turning radius R2 is marked on the combined side view diagram.

[0045] SP6', mark the midpoint between the marked point J and the marked point I in the unit overhead view diagram in step SP1' as point N', where point N' is the intersection of the center line of the cabin and the main boom rod when the front of the cabin faces the main boom rod before deflection, and the center line of the cabin coincides with the line connecting point D and point L after deflection;

[0046] Confirm a point with the size corresponding to the distance H just below point N', take the confirmed point as the starting point, and confirm a point O' with the size corresponding to the turning radius R2. Point O' is the turning center of the main crane;

[0047] SP7', use straight lines to connect point O' and point D, point O' and point C', point O' and point B', ∠O'C'L is the deflection angle of the nacelle, the distance between point O' and point D is the operating radius R3 of the main crane when the nacelle is hoisted, the distance between point O' and point C' is the operating radius R4 of the main crane when the tower is hoisted, and the distance between point O' and point D is the operating radius R5 of the main crane when the blade is hoisted, which is used to verify whether the construction meets the specifications;

[0048] SP8', the blade will have at least a displacement S during the hoisting process. Combined with the positions of point E and point F in step SP1', the calculation formula 10 for the displacement S is:

[0049] S=EF×sin∠O'G'L,

[0050] Verify that the displacement S is greater than 1 / 2 of the blade root flange diameter, which means that the safety requirements for blade installation construction are met.

[0051] As a preferred technical solution, the angle α between the extension line of the line segment AB and the line segment BC is 29°.

[0052] As an improvement to the above technical solution, the safety distance is 0.6m.

[0053] Due to the adoption of the above technical scheme, the present invention has the following beneficial effects: the mathematical calculation verification model calculates the operating radius of the main crane; the ruler and compass drawing verification model established through reverse thinking reasonably adopts the maximum value definition calculation method, and quantitatively and accurately determines the deflection angle of the cabin, the center point of the mechanical position, that is, the rotation center point of the main crane, the corresponding operating radius of each component during hoisting and other key data, so that the wind turbine equipment can be installed safely, quickly and accurately, solving the problem of high difficulty in hoisting heavy large impellers, and the structure is rigorous, reasonable, safe and reliable, and convenient for calculation and operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The following drawings are only intended to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0055] in:

[0056] Figure 1 is a schematic side view of the main crane formed in the mathematical calculation verification model of the embodiment of the present invention;

[0057] Figure 2 It is a simplified side view of the tower, nacelle and hub cover of the generator set formed in the ruler and compass drawing verification model of the embodiment of the present invention;

[0058] Figure 3 It is a schematic top view of the tower, nacelle and hub cover of the generator set formed in the ruler and compass drawing verification model of the embodiment of the present invention;

[0059] Figure 4 It is a schematic top view of the arm formed in the ruler and compass drawing verification model of the embodiment of the present invention;

[0060] Figure 5 It is a combined diagram of a top view of a unit and a side view of a main crane according to an embodiment of the present invention;

[0061] Figure 6 is Figure 4 Based on the combination Figure 5 Schematic diagram of the relevant operating radius obtained;

[0062] In the figure: 1-tower; 2-nacelle; 3-hub. DETAILED DESCRIPTION

[0063] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention are described only by way of illustration. Needless to say, those of ordinary skill in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0064] like Figures 1 to 6 As shown, a method for constructing a double verification model for anti-interference in the hoisting of a wind turbine generator set includes a mathematical calculation verification model and a ruler and compass drawing verification model. After verification using the mathematical calculation verification model, the ruler and compass drawing verification model is further refined to quantify the cabin deflection angle and optimize the operating radius of the main crane. The ruler and compass drawing verification model adopts a reverse thinking deduction method, based on the wind turbine hoisting safety regulations, and formulates an anti-interference safety verification drawing model by studying the construction status and external dimensions of the wind turbine equipment and the main crane. The main crane in this embodiment is a crane.

[0065] Specifically, the mathematical calculation verification model includes the following steps:

[0066] SP1. Build a side view diagram of the main crane after installation based on the main crane that has been determined to be used, as shown in the following figure. Figure 1 shown.

[0067] Determine the main crane rotation center point O, and determine the main crane arm root hinge point A, the main crane arm highest point B and the main crane jib end point C based on the main crane rotation center point O according to the technical parameters of the main crane that has been determined to be used, and the main crane rotation center point O is determined as the reference, and the main crane arm root hinge point A and the main crane arm root hinge point A are on the same horizontal line, and point O, point A, point B, and point C are connected in sequence with straight lines to obtain a side view diagram of the main crane;

[0068] SP2, determine that the projection point of the highest point C of the main crane jib on the extension line of the line connecting the main crane rotation center point O and the main crane jib root hinge point A is the projection point N, the projection point G is the overlapping point of the highest point C of the main crane jib and the projection point N on the ground, the distance between the projection point N and the projection point G is the vertical distance from the main crane jib root hinge point A to the ground, connect point A and point N, point C and point N, point N and point G respectively with straight lines, and the line segments obtained by combining the straight line connection in step SP1 are line segment OA, line segment AB, line segment BC, line segment CN, line segment AN and line segment NG;

[0069] Extend line segment AB, and the angle α between the extended line of line segment AB and line segment BC is the angle between the extended main boom and the main auxiliary boom; in this embodiment, the angle α between the extended line of line segment AB and line segment BC is 29°.

[0070] The lengths of line segment OA, line segment AB, line segment BC, line segment AN and line segment NG, and the angle α can be obtained by consulting the performance manual of the main crane;

[0071] SP3. Connect points A and C with a straight line to obtain line segment AC, and obtain ΔABC and RTΔANC. Use trigonometric functions to find the length of line segment AC. Formula 1 is:

[0072]

[0073] In the formula, ∠ABC=180°-α, ∠ABC is the angle between the main crane boom and the main crane auxiliary boom, and the lengths of line segment AB and line segment BC can be obtained by consulting the performance manual of the main crane;

[0074] SP4. Combine the values ​​of ∠ABC and use trigonometric functions to find ∠BAC. Formula 2 is:

[0075]

[0076] Wherein, the length of line segment BC is obtained by querying the performance manual of the main crane, and the length of line segment AC is obtained by calculation in step SP3;

[0077] SP5. In RTΔANC, the Pythagorean theorem can be used to obtain the calculation formula for line segment AC. Formula 3 is:

[0078]

[0079] Combining Formula 1 and Formula 3, we get Formula 4 for calculating the line segment CN:

[0080]

[0081] The length of line segment CN is the hoisting height corresponding to the operating radius ON of the main crane under this working condition;

[0082] SP6. Combined with formula 4, the formula 5 is obtained by inverse deduction based on trigonometric functions:

[0083]

[0084] SP7. Extend line segment AB and line segment NC compared to point M and obtain RTΔANM. In RTΔANM, the degree of ∠MAN can be calculated by formula 6, which is:

[0085] ∠MAN=∠BAC+∠CAN

[0086] Combining Formula 6, Formula 2 and Formula 5, we get Formula 7:

[0087]

[0088] The rearranged formula 8 is:

[0089] MN=(ON-OA)×Tg(∠MAN)

[0090] SP8. According to the installation drawing of the impeller unit, determine the vertex P of the outer end of the hub 3 after installation. The intersection of the horizontal line passing through point P and the main boom is point Q. Use a straight line to connect point P and point Q to obtain line segments PQ and RTΔQPM. RTΔQPM and RTΔANM are similar triangles. According to the proportionality of similar triangles, the length of line segment PQ is calculated. Formula 9 is:

[0091]

[0092] Combining formula 8, the length of line segment PQ can be calculated;

[0093] SP9. Obtain the distance L1 from the impeller lifting point to the top of the hub based on the technical data of the fan equipment manufacturer. If PQ-L1 ≥ 500mm, it proves that the operating radius ON of the selected main crane meets the safety requirements for the impeller lifting anti-resistance rod.

[0094] The ruler and compass drawing verification model comprises the following steps:

[0095] SP1', according to the technical data of the wind turbine equipment manufacturer, draw a simplified side view of the wind turbine tower 1, nacelle 2 and hub 3 in proportion, as shown in detail. Figure 2 As shown, the hub outer end vertex A', i.e., point P in step SP8, the impeller gravity center projection point B', the tower 1 gravity center projection point C', the nacelle gravity center projection point D, the blade pitch bearing 9 o'clock azimuth point E, the blade pitch bearing end face center point F are marked on the unit side view diagram, and the distance H from the nacelle centerline to the ground is marked;

[0096] According to the technical data of the wind turbine equipment manufacturer, a simplified top view diagram of the wind turbine tower, nacelle 2 and hub 3 is drawn in proportion, as shown in the following figure. Figure 3 As shown, the drawing scale of the unit side view diagram and the unit top view diagram is the same, and points A', B', C', D, E, and F are marked on the unit top view diagram accordingly, the outer edge of the blade root is extended so that it intersects the line connecting point A' and point D at point G' perpendicularly, and the distance L2 of a boom width extending from the blade root to the blade tail direction is marked;

[0097] SP2', according to the main crane that has been determined to be used, draw a top view of the main boom with the maximum shape according to the reduced scale of the wind turbine set, mark point J on one vertex of the top view of the boom, mark point I on the other vertex, and make point J and point I on the same horizontal line, as shown in the following figure: Figure 4 As shown;

[0098] A circle 1 is drawn with point J as the center and the safety distance as the radius, and the safety distance is 0.6 m.

[0099] Draw circle 2 with point I as the center and the distance between point B' and point F + safety distance as the radius.

[0100] Step SP2' reasonably utilizes the maximum value definition calculation method and selects the maximum cross-sectional size of the main boom and the circular diameter of the blade pitch bearing end face as key calculation data, which not only simplifies the calculation process but also increases the safety margin of the calculation base, ensuring strict issuance of verification results.

[0101] SP3', the outer edge of the blade root extends toward the blade tail and becomes tangent to circle 1 at point K, and the other direction of the outer edge of the blade root is extended perpendicular to the line connecting point A' and point D and intersects at point G'. Connect point K and point G' to obtain a tangent line G'K to circle 1, and make a perpendicular line to the tangent line G'K through point G'. Extending the perpendicular line will make it tangent to circle 2, and the point of tangency is point L, obtaining a tangent line G'L to circle 2, that is, tangent line G'K⊥tangent line G'L.

[0102] SP4', in step SP1', the outer edge of the blade root is extended so that it intersects the line connecting point A' and point D at point G' perpendicularly, and point B' and point C' are both located on the line connecting point A' and point D. Therefore, the tangent line G'L substantially coincides with the line connecting point A' and point D, that is, point B' and point C' are both located on the extension line of the tangent line G'L. The distance between point B' and point G', the distance between point B' and point C', and the distance between point C' and point D can be obtained according to the technical data of the wind turbine equipment manufacturer, and point B', point C' and point D are marked accordingly on the extension line of the tangent line G'L.

[0103] SP5', combine the top view diagram of the unit in step SP1' with the side view diagram of the main crane in step SP1, as shown in detail. Figure 5 As shown, the vertical distance from the center line of the nacelle to the line segment ON is H to determine the position of the nacelle 2, and the extension line of the line segment CN passes through point B', that is, a combined side view diagram of the wind turbine and the main crane is obtained;

[0104] The operating radius R1 of the main crane is marked on the combined side view diagram. The operating radius R1 is actually the line segment ON in the mathematical calculation verification model. The turning radius of the intersection of the center line of the nacelle and the front edge of the main boom is R2. The turning radius R2 is marked on the combined side view diagram.

[0105] SP6', mark the midpoint between the marked point J and the marked point I in the unit overhead diagram in step SP1' as point N', specifically as follows Figure 6 As shown, point N' is the point corresponding to the top view diagram of the unit when the front of the nacelle faces the main boom. The center line of the nacelle coincides with the line connecting point D and point L after the deflection.

[0106] Confirm a point at a distance corresponding to H just below point N', and use the confirmed point as the starting point (since it is a bird's-eye view, Figure 6 The midpoint N' coincides with a point confirmed directly below it), and a point O' is confirmed with the size corresponding to the turning radius R2. Point O' is the turning center of the main crane.

[0107] SP7', use straight lines to connect point O' and point D, point O' and point C', point O' and point B' respectively, ∠O'C'L is the deflection angle of the nacelle 2, the distance between point O' and point D is the operating radius R3 of the main crane when hoisting the nacelle 2, the distance between point O' and point C' is the operating radius R4 of the main crane when hoisting the tower 1, and the distance between point O' and point D is the operating radius R5 of the main crane for blade hoisting, which is used to verify whether the construction meets the specifications.

[0108] Through the coordination of the above steps, the relevant positions of the lifting points of each equipment component can be accurately located, and a calculation model can be constructed from multiple angles such as top view and side view. Through quantitative analysis, it is simply and intuitively verified whether the construction meets the specification requirements.

[0109] SP8', the blade will have at least a displacement S during the hoisting process. Combined with the positions of point E and point F in step SP1', the calculation formula 10 for the displacement S is:

[0110] S=EF×sin∠O'G'L,

[0111] Verify that the displacement S is greater than 1 / 2 of the blade root flange diameter, which means that the safety requirements for blade installation construction are met.

[0112] SP8' can accurately determine the impeller deflection angle to ensure that the tail blades avoid touching the arm, thereby improving the safety of impeller installation and construction, in line with the current development trend of large-diameter impeller installation.

[0113] The description of the present invention is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the invention to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for particular uses.

Claims

1. A method for constructing a double verification model for preventing interference in the installation of a wind turbine generator system, including a mathematical calculation verification model and a ruler and compass drawing verification model, characterized in that: The mathematical calculation verification model includes the following steps: SP1. Construct a side view diagram of the main crane after installation based on the main crane that has been determined to be used; Determine the main crane rotation center point O, and determine the main crane arm root hinge point A, the main crane arm highest point B and the main crane jib end point C based on the main crane rotation center point O according to the technical parameters of the main crane that has been determined to be used, and the main crane rotation center point O is determined as the reference, and the main crane arm root hinge point A and the main crane arm root hinge point A are on the same horizontal line, and point O, point A, point B, and point C are connected in sequence with straight lines to obtain a side view diagram of the main crane; SP2, determine that the projection point of the highest point C of the main crane jib on the extension line of the line connecting the main crane rotation center point O and the main crane jib root hinge point A is the projection point N, the projection point G is the overlapping point of the highest point C of the main crane jib and the projection point N on the ground, the distance between the projection point N and the projection point G is the vertical distance from the main crane jib root hinge point A to the ground, connect point A and point N, point C and point N, point N and point G respectively with straight lines, and the line segments obtained by combining the straight line connection in step SP1 are line segment OA, line segment AB, line segment BC, line segment CN, line segment AN and line segment NG; Extend line segment AB, the angle α between the extended line of line segment AB and line segment BC is the angle between the extended main boom and the main boom; The lengths of line segment OA, line segment AB, line segment BC, line segment AN and line segment NG, and the angle α can be obtained by consulting the performance manual of the main crane; SP3. Connect points A and C with a straight line to obtain line segment AC, and obtain ΔABC and RTΔANC. Use trigonometric functions to find the length of line segment AC. Formula 1 is: In the formula, ∠ABC=180°-α, ∠ABC is the angle between the main crane boom and the main crane auxiliary boom, and the lengths of line segment AB and line segment BC can be obtained by consulting the performance manual of the main crane; SP4. Combine the values ​​of ∠ABC and use trigonometric functions to find ∠BAC. Formula 2 is: Wherein, the length of line segment BC is obtained by querying the performance manual of the main crane, and the length of line segment AC is obtained by calculation in step SP3; SP5. In RTΔANC, the Pythagorean theorem can be used to obtain the calculation formula for line segment AC. Formula 3 is: Combining Formula 1 and Formula 3, we get Formula 4 for calculating the line segment CN: The length of line segment CN is the hoisting height corresponding to the operating radius ON of the main crane under this working condition; SP6. Combined with formula 4, the formula 5 is obtained by inverse deduction based on trigonometric functions: SP7. Extend line segment AB and line segment NC compared to point M and obtain RTΔANM. In RTΔANM, the degree of ∠MAN can be calculated by formula 6, which is: M4V=BAC+C4V Combining Formula 6, Formula 2 and Formula 5, we get Formula 7: The rearranged formula 8 is: MV=(ON-OA)×Tg(∠MAN) SP8. According to the installation drawing of the impeller unit, determine the vertex P of the outer end of the hub after installation. The intersection of the horizontal line passing through point P and the main boom is point Q. Use a straight line to connect point P and point Q to obtain line segments PQ and RTΔQPM. RTΔQPM and RTΔANM are similar triangles. According to the proportionality of similar triangles, the length of line segment PQ is calculated. Formula 9 is: Combining formula 8, the length of line segment PQ can be calculated; SP9. Obtain the distance L1 from the impeller lifting point to the top of the hub according to the technical data of the fan equipment manufacturer. If PQ-L1 ≥ 500mm, it proves that the operating radius ON of the selected main crane meets the safety requirements of the impeller lifting anti-resistance rod; The ruler and compass drawing verification model comprises the following steps: SP1, according to the technical data of the wind turbine equipment manufacturer, draw a simplified side view of the tower, nacelle and hub of the wind turbine in proportion, and mark the hub outer end vertex A, that is, point P in step SP8, the projection point B of the impeller center of gravity on the top surface, the projection point C of the center of gravity on the top surface after the tower is erected, the projection point D of the nacelle center of gravity on the top surface, the 9 o'clock azimuth point E of the blade pitch bearing, the center point F of the end face of the blade pitch bearing, and mark the distance H from the center line of the nacelle to the ground; According to the technical data of the wind turbine equipment manufacturer, a simplified overhead view of the wind turbine tower, nacelle and hub is drawn in proportion, and points A, B, C, D, E and F are marked on the simplified overhead view of the wind turbine, the outer edge of the blade root is extended to make it perpendicular to the line connecting points A and D at point G, and the distance L2 of a boom width extending from the blade root to the blade tail is marked; SP2, according to the main crane that has been determined to be used, draw a top view of the main boom with the maximum shape according to the reduced scale of the wind turbine, mark point J on one vertex of the top view of the boom, mark point I on the other vertex, and make point J and point I on the same horizontal line; Draw circle 1 with point J as the center and the safety distance as the radius; Draw circle 2 with point I as the center and point B, the distance from point F + the safety distance as the radius; SP3, the outer edge of the blade root extends toward the blade tail and becomes tangent to circle 1 at point K, and the other direction of the outer edge of the blade root is perpendicular to the line connecting point A and point D and intersects at point G, connect point K and point G to obtain a tangent line G,K of circle 1, make a perpendicular line to tangent line G,K through point G, extend the perpendicular line to become tangent to circle 2, and the tangent point is point L, obtaining a tangent line G,L of circle 2, that is, tangent line G,K⊥tangent line G,L; SP4, in step SP1, extend the outer edge of the blade root so that it intersects the line connecting point A and point D at point G, perpendicularly, and point B and point C are both located on the line connecting point A and point D. Therefore, tangent line G,L substantially coincides with the line connecting point A and point D, that is, point B, and point C are both located on the extension line of tangent line G,L. According to the technical data of the wind turbine equipment manufacturer, the distance between point B and point G, the distance between point B and point C, and the distance between point C and point D can be obtained, and accordingly, point B, point C, and point D are marked on the extension line of tangent line G,L accordingly; SP5′, combine the top view diagram of the wind turbine in step SP1′ with the side view diagram of the main crane in step SP1′, determine the position of the nacelle with the vertical distance from the center line of the nacelle to the line segment ON as H, and make the extension line of the line segment CN pass through point B′, so as to obtain a combined side view diagram of the wind turbine and the main crane; The operating radius R1 of the main crane is marked on the combined side view diagram. The operating radius R1 is actually the line segment ON in the mathematical calculation verification model. The turning radius of the intersection of the center line of the nacelle and the front edge of the main boom is R2. The turning radius R2 is marked on the combined side view diagram. SP6′, mark the midpoint between the marked point J and the marked point I in the unit overhead view diagram in step SP1′ as point N′, where point N′ is the intersection of the center line of the cabin and the main boom rod when the front of the cabin faces the main boom rod before deflection, and the center line of the cabin coincides with the line connecting point D and point L after deflection; Confirm a point with the size corresponding to the distance H just below point N, take the confirmed point as the starting point, and confirm a point O with the size corresponding to the turning radius R2, point O is the turning center of the main crane; SP7, respectively connect point O, and point D, point O, and point C, point O, and point B with straight lines, ∠O, C, L is the deflection angle of the nacelle, the distance between point O, and point D is the operating radius R3 of the main crane when the nacelle is hoisted, the distance between point O, and point C is the operating radius R4 of the main crane when the tower is hoisted, and the distance between point O, and point D is the operating radius R5 of the main crane for blade hoisting, which is used to verify whether the construction meets the specifications; SP8, the blade will have at least a displacement S during the hoisting process. Combined with the positions of the midpoint E and point F in step SP1, the calculation formula 10 for the displacement S is: S=EF×sin∠O,G,L, Verify that the displacement S is greater than 1 / 2 of the blade root flange diameter, which means that the safety requirements for blade installation construction are met.

2. The method for constructing a double verification model for preventing interference in the installation of a wind turbine according to claim 1, characterized in that: The angle α between the extension line of the line segment AB and the line segment BC is 29°.

3. The method for constructing a double verification model for preventing interference in the installation of a wind turbine according to claim 1, characterized in that: The safety distance is 0.6m.

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