CN116061350A

CN116061350A - But rigidity wind-powered electricity generation blade mould structure of quick replacement wing section

Info

Publication number: CN116061350A
Application number: CN202211089341.1A
Authority: CN
Inventors: 应绪东; 陈滨江; 陆家麟
Original assignee: Guruite Mould Taicang Co ltd
Current assignee: Guruite Mould Taicang Co ltd
Priority date: 2022-08-29
Filing date: 2022-09-07
Publication date: 2023-05-05

Abstract

The invention discloses a rigid wind power blade mould structure capable of rapidly replacing an airfoil, which comprises a supporting structure for supporting an upper mould or a lower mould and a clamping structure for clamping the upper mould and the lower mould together, wherein a mould shell on the supporting mechanism is the lower mould, after a female mould is demolded, a bottom supporting and adjusting device supports the lower mould, a crane is used for lifting the lower mould away, the mould shell on the supporting mechanism is the upper mould, after the female mould is demolded, the mould shell is overturned above the lower mould by a turnover beam, and the flange edge of the upper mould and the flange edge of the lower mould are limited and abutted by the clamping mechanism to lock the upper mould and the lower mould.

Description

But rigidity wind-powered electricity generation blade mould structure of quick replacement wing section

Technical Field

The invention relates to the field of wind turbine blade molds, in particular to a rigid wind turbine blade mold structure capable of rapidly replacing an airfoil.

Background

Wind energy is becoming more and more important worldwide as a clean renewable energy source. The energy is about 2.74×109MW, and the available energy is 2×107MW, which is 10 times larger than the energy available on earth. Wind is used for a long time, mainly, water is pumped and ground by a windmill, and the like, but at present, people are interested in how to generate electricity by using wind, and the principle of wind power generation is that wind power is used for driving windmill blades to rotate, and then the rotating speed is increased by a speed increaser so as to promote a generator to generate electricity. According to the current wind power generation technology, the generation can be started at a breeze speed of about three meters per second. Wind power generation is forming a hot tide in the world, because wind power generation has no fuel problems and does not generate radiation or air pollution.

Along with the great development of clean energy in China, the wind power industry rapidly develops, megawatt levels of wind power blades are larger and larger, the length of the wind power blades is from original twenty-three meters to one hundred meters at present, and therefore the cost is high and the operation procedure is complicated when the blade mould is manufactured.

The current wind power blade mould shell structure is typically made of polymer composite materials, such as fiber reinforced plastics, and the interior of the wind power blade mould shell structure may comprise core materials, such as artificial foam, wood, metal honeycomb materials and the like. Typical molding processes include: hand lay-up molding, hand lay-up bag press molding, vacuum lead-in molding, autoclave molding, resin transfer molding, prepreg laying molding and the like. Typical mold shell structures generally have a relatively uniform thickness and their primary function is to provide the desired physical dimensions, process conditions (e.g., vacuum, temperature, surface roughness) for blade manufacture, and the like.

Because the mold shell is relatively thin and has low rigidity, the mold shell alone cannot ensure the maintenance of the geometric shape in the blade production process, and the mold shell is often supported by a complex steel frame. In a typical process of blade production, a steel frame is a source of rigidity of the whole mold system during blade molding in a mold opening state, mold closing and the like. The current mould shell has the characteristic of low rigidity, and the rigidity of the steel frame is required to be higher, so that the design is complex, the weight is heavier, and the manufacturing period is long. In the prior art, in order to connect a die shell and a steel frame, a metal tube extending along the length direction of the die is usually arranged on the die steel frame, then glass fiber cloth soaked with resin is wrapped on the metal tube and is pasted on the back of the die shell by hand, and then the die shell is cured. The metal tubes can be arranged in parallel in the width direction of the die, the metal plates with the shape are used for being connected with the die shell locally, more degrees of freedom are connected, the die shell cannot be restrained fully in the width direction, and the situation that the profile in the direction is large in change and the quality is unstable in the blade production process is caused.

In order to improve the rigidity of the die shell, different types of reinforcing ribs are usually designed and installed on the back of the die shell, or the thickness of the die shell is increased, different types of core materials such as PET, PVC, bassal wood, aluminum honeycomb and the like are adopted to improve the rigidity of the die shell, the materials are high in cost and heavy in weight, and the environment is polluted during molding, for example, staff can bring certain harm to body health after contacting the composite materials for a long time.

Disclosure of Invention

The invention aims to: the invention aims to solve the defects of the prior art, and provides a rigid wind power blade mould structure capable of quickly replacing an airfoil, which improves bending rigidity, thereby greatly improving the deformation resistance of a shell, simplifying a supporting structure, shortening manufacturing and installation periods, reducing the size of a structural space, lightening the whole weight of a mechanism, facilitating transportation, reducing energy consumption and pollution, improving installation efficiency and saving cost.

The technical scheme is as follows: in order to achieve the above object, the present invention provides a rigid wind power blade mold structure capable of rapidly replacing an airfoil, comprising a support structure for supporting an upper mold or a lower mold and a clamping structure for clamping the upper mold and the lower mold together;

the support structure comprises: the cross-section steel structure frame, bottom sprag adjusting device, sectional type support, bracing piece, the guide rail, connecting device shaped steel and slider, cross-section steel structure frame cover establish on the turning arm, bottom sprag adjusting device installs perpendicularly on cross-section steel structure frame, the one end of connecting device shaped steel links firmly in cross-section steel structure frame's bottom perpendicularly, the other end and the telescopic link of connecting device shaped steel are connected, the guide rail is installed in cross-section steel structure frame's bottom, the one end of bracing piece articulates on the telescopic link, the other end of bracing piece is horizontal rectilinear movement on the guide rail through the slider.

After the molded surface of the die shell is determined, when the supporting height of the supporting mechanism is required to be adjusted, the telescopic rod is pulled out of the connecting device profile steel to a limited height, the sliding block at the moment slides to a limited position on the guide rail under the driving of the supporting rod, then the sliding block is inserted into the bolt hole through the bolt, so that the position of the sliding block on the guide rail is limited, and finally, the supporting rod, the cross-section steel structure frame and the connecting device profile steel form a triangle, so that the stability and the reliability of the supporting connecting rod for supporting the molded surface of the die are ensured.

The fixture include: the device comprises an electromagnet, a metal block and a locking device, wherein the electromagnet or the metal block is respectively arranged in a flange edge on an upper die or a lower die, the locking device is sleeved at the joint of the flange edge of the upper die and the flange edge of the lower die, and the locking device is controlled to be in the prior art through the electrifying and the outage of the electromagnet and is not repeated here.

If the die shell on the supporting mechanism is a lower die, after the female die is demolded, the lower die is supported by the bottom support adjusting device, and the lower die is lifted away by the travelling crane, if the die shell on the supporting mechanism is an upper die, after the female die is demolded, the die shell is overturned above the lower die by the overturning beam, and the flange edge of the upper die and the flange edge of the lower die are limited and abutted by the clamping mechanism, so that the upper die and the lower die are locked.

As a further preferred mode of the invention, the connecting device profile steel and the supporting rods are respectively and symmetrically arranged on the section steel structure frame, the supporting strength of the connecting device profile steel relative to the section steel structure frame is reinforced by horizontally moving the two supporting rods on the guide rails, and the supporting rods with adjustable heights are matched with the supporting of the plurality of sectional brackets, so that the upper die or the lower die is supported, and the stability of the positions of the upper die or the lower die above the sectional brackets and the connecting device profile steel is ensured.

As a further preferred mode of the invention, the piston rod on the bottom support adjusting device is detachably connected with the sectional type bracket, when rigid wind power blades of different wing types are required to be replaced, the sectional type bracket is only required to be detached, and the size of the sectional type bracket matched with the shape of the blades and the telescopic height of the telescopic rod on the section steel of the connecting device can be adjusted to be suitable for the die shells of the different wing types.

As a further preferred aspect of the present invention, the shape of the segmented support is adapted to the shape of the outer surface of the mold shell above the segmented support for supporting wind power blades of different sizes.

As a further preferred aspect of the present invention, the number of the bottom support adjusting means is at least two, thereby ensuring the stability and reliability of the support.

As a further preferred aspect of the present invention, the guide rail is fixed to the bottom of the cross-section steel structure frame by means of screw connection, and when the rigid blade of an unusual size needs to be replaced quickly, the telescopic height of the telescopic rod on the section steel of the connecting device is adjusted by adjusting the positions of the two guide rails.

As a further preferred aspect of the present invention, the guide rail is provided with a latch hole for limiting the sliding block, and when the sliding block is required to move horizontally to a limited position, the sliding block is slid to a limited position on the guide rail by inserting the latch into the latch hole in advance, thereby limiting the limited position of the sliding block sliding on the guide rail.

As a further preferred aspect of the present invention, the support bar and the slider are connected by means of a hinge.

As a further preferred aspect of the invention, the bottom support adjustment means and the locking means are powered by an air pump system or a hydraulic system, respectively.

As a further preferred aspect of the present invention, the air pump system or the hydraulic system is connected to a PLC circuit.

As a further preference of the invention, the ends of two adjacent telescopic rods are respectively and vertically connected with the support connecting rod, thereby ensuring the stability and reliability of the support of the mould shell, and simultaneously, according to the curved surfaces of the mould shells with different wing profiles, different mould shells can be adapted.

As a further preferred aspect of the present invention, the inner surfaces of the flange sides of the upper die and the flange sides of the lower die are provided with guide concave-convex blocks for aligning the relative positions of the upper die and the lower die.

The beneficial effects are that: compared with the prior art, the rigid wind power blade mold structure capable of quickly replacing the wing profile has the following advantages:

(1): by eliminating the use of a complex steel frame structure, the weight of the die is reduced as a whole, and meanwhile, the cost is saved;

(2): the bending rigidity of the reinforced mould glass fiber reinforced plastic shell structure is several orders of magnitude higher than that of a common mould shell, so that the deformation resistance of the shell is greatly improved, and necessary conditions are provided for fewer and simpler supporting structures;

(3): the bending strength of the die shell obtained through the die result is higher than that of the die shell in the prior art, so that the deformation resistance of the shell is greatly improved, the supporting structure is simplified, the manufacturing and mounting period is shortened, the size of the structural space is reduced, the whole weight of the mechanism is reduced, the transportation is convenient, the energy consumption and pollution are reduced, the mounting efficiency is improved, and the cost is saved;

(4): when the rigid wind power blades with different wing profiles are required to be replaced, only the sectional type bracket is required to be detached, the size of the sectional type bracket matched with the shape of the blade and the telescopic height of the telescopic rod on the steel structure frame with the opposite section of the connecting device profile steel are required to be adjusted, and waste and pollution are reduced;

(5): the die shell is quickly replaced through the integral structure, so that the time cost of the overall die is reduced, and the sustainable development policy is supported;

(6): the preparation method is simple, easy to operate, convenient to construct, high in use flexibility, good in adaptability and easy to popularize and apply.

Drawings

FIG. 1 is a schematic view of a mold housing mounted on a support mechanism;

FIG. 2 is a schematic diagram of the turnover mechanism in a turnover operation state;

FIG. 3 is a schematic diagram of the structure of the present invention;

FIG. 4 is a front view of the present invention;

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

FIG. 6 is a schematic view of the internal structure of the slider;

FIG. 7 is a schematic view of a locking device;

fig. 8 is a schematic view of the working state of the present invention.

Detailed Description

The invention is further elucidated below in conjunction with the drawings.

As shown in the attached drawings, the rigid wind power blade mould structure capable of quickly replacing the wing shape comprises the following components: the device comprises a turning arm 1, a section steel structure frame 20, a bottom support adjusting device 2, a sectional bracket 3, a supporting rod 4, a guide rail 5, a connecting device profile steel 6, a sliding block 7, a bolt hole 8, an electromagnet 9, a metal block 10, a locking device 11, a round tube 12, an electromagnet 9, a metal block 10 and a locking device 11.

The following steps are required for obtaining the lower die by the device: manufacturing a die shell 30 on a female die, analyzing the distribution space of the bottom support adjusting device 2, uniformly arranging round tubes 11 on the back of the hand lay-up die shell 30, coating back rigidity enhancement layer materials, and demolding the female die;

the following steps are needed to obtain the upper die by the device: manufacturing a die shell 30 on a female die, analyzing the distribution space of a bottom support adjusting device 2, uniformly arranging round tubes 11 on the back of the hand lay-up die shell 30, coating back rigidity reinforcing layer materials, demolding the female die, assembling a steel structure frame with a turnover section, connecting flange edges, and carrying out laser detection and profile adjustment according to a 3D die;

the female mold is a master mold, the upper mold and the lower mold are manufactured on the master mold, as shown in fig. 1, the female mold positioned on the inner surface of the lower mold is demolded after the lower mold is manufactured, and the female mold positioned on the inner surface of the upper mold is demolded after the upper mold is manufactured, and then the upper mold is overturned to the upper side of the lower mold by a turnover mechanism, as shown in fig. 2.

When the shell structure needs to be replaced, the die shell 30 is transported away from the corresponding sectional bracket 3, the bottom support adjusting device 2 can be repeatedly used for die structures with different leaf shapes, after the die shell is replaced, the bottom support adjusting device 2 can be used by adjusting the height according to the change of the surface curvature of the die shell 30, so that the waste and pollution are greatly reduced, the cost is saved, and a better solution is provided for sustainable development of economy and environment.

Comparative experimental data

Taking a commercially available 80-meter die as an example for comparison, each parameter of the die housing is compared respectively, and the method is as follows:

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as can be seen from comparison, the structure of the replaceable shell obtained by the method improves the bending rigidity, thereby greatly improving the deformation resistance of the shell to simplify the supporting structure, shortening the manufacturing and mounting period, reducing the size of the structural space, lightening the whole weight of the mechanism, facilitating transportation, reducing energy consumption and pollution, improving the mounting efficiency and saving the cost

Example 1

Step one, manufacturing a die shell 30 as a lower die on the outer surface of a master die, sequentially curing a surface layer, a heating layer and a reinforcing layer on the back of the die shell 30, embedding square tubes at flange edges on two sides of the die shell 30, and curing for 7h at the temperature of 40 ℃;

step two, after the solidification process of the embedded square tube of the die is finished, analyzing the stress condition of each component part on the die shell 30 through FEA mechanical finite element analysis software;

step three, after uniformly arranging the round tubes 11 on the back of the die shell 30, reserving a connecting window of the round tubes 11 and a supporting structure when pasting 2 layers of the epoxy resin and LTM800/225 glass fiber cloth by hand, and curing for 12 hours at room temperature after the hand pasting process is finished;

step four, coating a back rigidity enhancement layer material on the back of the die shell 30 after the hand pasting process is completed;

the back rigidity enhancing layer is manufactured by the following steps:

(1) Adding 10 parts by weight of perlite, bentonite, ceramic particles, basalt or silicon oxide and 5 parts by weight of fiber filaments, short steel wires or quartz sand into planetary stirring equipment, mixing for 5min, stirring uniformly, adding 30 parts by weight of epoxy resin into a stirrer, stirring for 10min, and obtaining a back rigidity enhancement layer material when the viscosity is 10000 cp;

(2) Uniformly smearing the rigid reinforcing layer material on the back of the die shell except the reserved connecting window in a thickness of 2cm by extrusion equipment or manual extrusion;

(3) And after the coating of the back of the die shell except the reserved connecting window is finished, curing for 6-10 hours at room temperature to obtain the back rigidity reinforcing layer.

Step five, demolding the female die after the back rigidity enhancement layer is molded;

the bottom support adjusting device 2 is used for adjusting according to curvature fluctuation of the molded surface to match with supports of different molded surfaces, the curvature fluctuation of the molded surface is modeled in Pro/E software, and curvature change of the molded surface is obtained by combining ANASYS analysis software, so that design adjustment of the molded surface support is carried out;

the bottom support adjusting device 2 is a telescopic piston rod powered by an air pump as a supporting element, when the mold shell is required to be supported, the position of the bottom support adjusting device is determined according to the calculated result in the second step, then the profile curvature fluctuation is determined according to the curved surface condition of the outer surface of the upper mold, modeling is performed in Pro/E software, the curvature change of the profile is obtained by combining with ANASYS analysis software, the extension length of the piston rod is determined according to the curvature change, after the sliding block 7 slides on the guide rail 5 to a limiting position, the sliding block 7 slides on the guide rail 5 to a limiting position after a bolt is inserted into the bolt hole 8 in advance, the limiting position of the sliding block 7 sliding on the guide rail 5 is limited, the extension height of the telescopic rod 61 on the two connecting device section steel 6 is adjusted, and the supporting of the mold shell 30 is realized through the two connecting device section steel 6 and the plurality of sectional brackets 3 being matched with the profile of the mold shell 30;

finally, the female die is adjusted upwards from the supporting structure through the travelling crane.

Example 2

Step one, manufacturing a die shell 30 as a lower die on the outer surface of a master die, sequentially curing a surface layer, a heating layer and a reinforcing layer on the back of the die shell 30, embedding square tubes at flange edges on two sides of the die shell 30, and curing for 9 hours at the temperature of 50 ℃;

step three, after uniformly arranging the round tubes 11 on the back of the die shell 30, reserving a connecting window of the round tubes 11 and the supporting structure when pasting 2 layers of the epoxy resin and the LTM800/225 glass fiber cloth by hand, and curing for 12 hours at room temperature after the hand pasting process is finished

the back rigidity enhancing layer is manufactured by the following steps:

(1) Adding 30 parts by weight of perlite, bentonite, ceramic particles, basalt or silicon oxide and 10 parts by weight of fiber filaments, short steel wires or quartz sand into planetary stirring equipment, mixing for 10min, stirring uniformly, adding 70 parts by weight of epoxy resin into a stirrer, stirring for 20min, and obtaining a back rigidity enhancement layer material when the viscosity is 20000 cp;

(2) Uniformly smearing the rigid reinforcing layer material on the back of the die shell except the reserved connecting window in a thickness of 20cm by extrusion equipment or manual extrusion;

(3) And after the coating of the back of the die shell except the reserved connecting window is finished, curing for 10 hours at room temperature to obtain the back rigidity reinforcing layer.

the bottom support adjusting device 2 is a telescopic piston rod powered by an air pump as a supporting element, when the mold shell is required to be supported, the position of the bottom support adjusting device is determined according to the calculated result in the second step, then the profile curvature fluctuation is determined according to the curved surface condition of the outer surface of the upper mold, modeling is performed in Pro/E software, the curvature change of the profile is obtained by combining with ANASYS analysis software, the extension length of the piston rod is determined according to the curvature change, after the sliding block 7 slides on the guide rail 5 to a limiting position, the sliding block 7 slides on the guide rail 5 to a limiting position after a bolt is inserted into the bolt hole 8 in advance, the limiting position of the sliding block 7 sliding on the guide rail 5 is limited, the extension height of the telescopic rods 61 on the two connecting device section steels 6 is adjusted, and the supporting of the mold shell 30 is realized through the matching of the two connecting device section steels 6 and the plurality of sectional supports 3 with the profile of the mold shell 30;

Example 3

Step one, manufacturing a die shell 30 on the outer surface of a female die as an upper die, sequentially curing a surface layer, a heating layer and a reinforcing layer on the back of the die shell 30, embedding square tubes on flange edges on two sides of the die shell 30, and curing at 45 ℃ for 8 hours;

the back rigidity enhancing layer is manufactured by the following steps:

(1) Adding 20 parts by weight of perlite, bentonite, ceramic particles, basalt or silicon oxide and 8 parts by weight of fiber filaments, short steel wires or quartz sand into planetary stirring equipment, mixing for 7min, stirring uniformly, adding 50 parts by weight of epoxy resin into a stirrer, stirring for 16min, and obtaining a back rigidity enhancement layer material when the viscosity is 15000 cp;

(2) Uniformly smearing the rigid reinforcing layer material on the back of the die shell except the reserved connecting window in a thickness of 10cm by extrusion equipment or manual extrusion;

(3) And after the coating of the back of the die shell except the reserved connecting window is finished, curing for 8 hours at room temperature to obtain the back rigidity reinforcing layer.

the bottom support adjusting device 2 is a telescopic piston rod powered by an air pump as a supporting element, when the mold shell is required to be supported, the position of the bottom support adjusting device is determined according to the calculated result in the second step, then the profile curvature fluctuation is determined according to the curved surface condition of the outer surface of the upper mold, modeling is performed in Pro/E software, the curvature change of the profile is obtained by combining with ANASYS analysis software, the extension length of the piston rod is determined according to the curvature change, after the sliding block 7 slides on the guide rail 5 to a limiting position, the sliding block 7 slides on the guide rail 5 to a limiting position after a bolt is inserted into the bolt hole 8 in advance, the limiting position of the sliding block 7 sliding on the guide rail 5 is limited, the extension height of the extension rod 61 on the two connecting device profile steels 6 is adjusted, and the supporting of the mold shell 30 is realized through the two connecting device profile steels 6 and the plurality of sectional brackets 3 being matched with the profile of the mold shell 30;

step six, adding a rigidity reinforcing layer after the demolding of the female mold is completed;

welding and fixing the connecting device profile steel 6 and a circular tube at the back of the die shell, adding a hand paste layer on the periphery of the circular tube for connection, adding an inorganic nonmetallic ceramic filler group serving as an enhanced ceramic shell into a basic carrier of epoxy resin or a gelatinizing agent, and coating the enhanced ceramic shell on the surface of the back rigidity enhancement layer in a hand paste mode;

step seven, die assembly

The turnover arm 1 of the turnover mechanism is welded on the turnover section steel frame, the hydraulic system controls the turnover arm to work, the turnover of the upper die is realized, and finally the die is closed;

step eight, installing a clamping mechanism to connect the die shell;

the upper die flange and the lower die flange are prefabricated with metal blocks 10 and electromagnets 9, the surface of the flange is provided with a guiding concave-convex device for aligning the relative positions of the upper die and the lower die, the locking and closing of a locking device 11 are carried out when the blades of the dies are solidified through the connection and disconnection of the electromagnets 9, and the locking device 11 controls the connection and separation of the connection parts of the flange of the upper die and the flange of the lower die in a hydraulic transmission or pneumatic transmission mode;

step eight, performing laser detection and profile adjustment according to the 3D model of the die

The upper die is turned over to the upper side of the lower die through a turning mechanism, after die assembly is completed, the position needing to be adjusted is detected through a laser detection mechanism, and then the molded surfaces of the upper die and the lower die after die assembly are adjusted through polishing equipment or manually.

The foregoing embodiments are merely illustrative of the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, not to limit the scope of the present invention. All changes and modifications that come within the meaning and range of equivalency of the invention are to be embraced within their scope.

Claims

1. But rigid wind-powered electricity generation blade mould structure of quick replacement wing section, its characterized in that: it comprises the following steps: a support structure for supporting the upper die or the lower die and a clamping structure for clamping the upper die and the lower die together;

the support structure comprises: the device comprises a section steel structure frame (20), a bottom support adjusting device (2), a sectional bracket (3), a supporting rod (4), a guide rail (5), a connecting device profile steel (6) and a sliding block (7), wherein the section steel structure frame (20) is sleeved on a turnover arm (1), the bottom support adjusting device (2) is vertically arranged on the section steel structure frame (20), one end of the connecting device profile steel (6) is vertically fixedly connected to the bottom of the section steel structure frame (20), the other end of the connecting device profile steel (6) is connected with a telescopic rod (61), the guide rail (5) is arranged at the bottom of the section steel structure frame (20), one end of the supporting rod (4) is hinged to the telescopic rod (61), and the other end of the supporting rod (4) horizontally and linearly moves on the guide rail (5) through the sliding block (7);

the fixture include: the device comprises an electromagnet (9), a metal block (10) and a locking device (11), wherein the electromagnet (9) or the metal block (10) is respectively arranged in a flange edge on an upper die or a lower die, and the locking device (11) is sleeved at the joint of the flange edge of the upper die and the flange edge of the lower die.

2. A rigid wind turbine blade mould structure with a rapidly replaceable airfoil according to claim 1, characterized in that: the connecting device profile steel (6) and the supporting rods (4) are symmetrically arranged on the section steel structure frame (20) respectively.

3. A rigid wind turbine blade mould structure with a rapidly replaceable airfoil according to claim 1, characterized in that: the piston rod on the bottom support adjusting device (2) is detachably connected with the segmented bracket (3).

4. A rigid wind turbine blade mould structure with a rapidly replaceable airfoil according to claim 1, characterized in that: the shape of the sectional type bracket (3) is matched with the shape of the outer surface of the die shell (30) above the sectional type bracket.

5. A rigid wind turbine blade mould structure with a rapidly replaceable airfoil according to claim 1, characterized in that: the number of the bottom support adjusting devices (2) is at least two.

6. A rigid wind turbine blade mould structure with a rapidly replaceable airfoil according to claim 1, characterized in that: the guide rail (5) is fixed at the bottom of the section steel structure frame (20) in a threaded connection mode.

7. A rigid wind turbine blade mould structure with a rapidly replaceable airfoil according to claim 6, characterized in that: the guide rail (5) is provided with a bolt hole (8) for limiting the sliding block (7).

8. A rigid wind turbine blade mould structure with a rapidly replaceable airfoil according to claim 1, characterized in that: the bottom support adjusting device (2) and the locking device (11) are respectively powered by an air pump system or a hydraulic system connected with the PLC circuit.

9. A rigid wind turbine blade mould structure with a rapidly replaceable airfoil according to claim 1, characterized in that: the end parts of the two adjacent telescopic rods (61) are respectively and vertically connected with the supporting connecting rods (62).

10. A rigid wind turbine blade mould structure with a rapidly replaceable airfoil according to claim 1, characterized in that: the inner surfaces of the upper die flange and the lower die flange are provided with guide concave-convex blocks for aligning the relative positions of the upper die and the lower die.