A wind power blade positioning and pressing device

Abstract

The present invention relates to the field of wind turbine blade manufacturing, and particularly relates to a positioning and pressing-down device for wind turbine blades, which includes a suspension beam frame and a gantry support. There are two symmetrically arranged gantry supports, and the suspension beam frame is clamped between the two gantry supports; it also includes a connecting device, a pressure-bearing device, an external support bracket, and a positioning support. The connecting device is connected to the upper part of the gantry support, and the suspension beam frame is clamped between the connecting devices; the pressure-bearing device is fixedly connected to the lower part of the suspension beam frame, and the lower end of the pressure-bearing device is connected to a web, and the web is arranged above the blade manufacturing mold; the external support bracket is fixedly connected to the lower part of the connecting device, and the external support bracket is arranged on both sides of the web; the positioning support is connected to the lower end of the gantry support, and the positioning support is arranged on both sides of the blade manufacturing mold.

Description

Technical Field

[0001] The present invention relates to the field of wind turbine blade manufacturing, and particularly to a positioning and pressing device for wind turbine blades. Background Art

[0002] A wind turbine blade is composed of a suction surface shell and a pressure surface shell bonded together to form a hollow shell structure. The suction surface shell and the pressure surface shell are connected by bonding blade webs. Therefore, the positioning accuracy and bonding quality of the blade webs are very important in the blade manufacturing process. The blade web is a sandwich structure composed of a PVC core material and a fiberglass cloth. It is relatively light in weight, long and soft, and it is difficult to meet the design requirements in terms of web hoisting, positioning accuracy, and bonding quality with the blade shell during the manufacturing process of wind turbine blades.

[0003] Application No.: CN201710465644.1, Title: Blade Web Positioning Tooling, a Chinese invention patent discloses a positioning tooling for installing a wind turbine blade web. It aims to solve the problems of low automation level of the existing positioning tooling, requiring multiple people to cooperate, and inaccurate positioning and / or clamping parts, which ultimately affect the web positioning error, installation efficiency, and glue extrusion bonding effect. The technical solution adopted is to fix the web through a suction cup, and then complete operations such as support, locking, and glue pressing through a hydraulic support locking device in cooperation with dog claws, a main steel frame, etc.

[0004] The above disclosed technical solution has the following problems:

[0005] First, although the position of the web can be adjusted, the adjustment method is not scientific and reasonable, and it cannot accurately ensure the installation position requirements of the web.

[0006] Second, this invention can only position and install one web. With the progress of wind turbine blade technology, the volume of wind turbine blades is getting larger and larger, resulting in an increase in the number of webs inside the blade. If the number of webs is greater than 1, the above technical solution cannot be used. Summary of the Invention

[0007] To overcome the problems existing in the above prior art, the purpose of the present invention is to provide a positioning and pressing device for wind turbine blades, which can effectively adjust the position of the web, ensure the positioning accuracy of the web, and is not limited by the number of webs. It can be adjusted and used according to the actual number of webs. The structure is simple, easy to process, and economically practical, solving the problems existing in the prior art.

[0008] The technical solution adopted by the present invention is as follows: a positioning and pressing-down device for a wind turbine blade, comprising a suspension beam frame and a gantry support. Two gantry supports are symmetrically provided, and the suspension beam frame is clamped between the two gantry supports. It further includes a connecting device, a pressure-bearing device, an outer support bracket, and a positioning support. The connecting device is connected to the upper part of the gantry support, and the suspension beam frame is clamped between the connecting devices. The pressure-bearing device is fixedly connected to the lower part of the suspension beam frame, and the lower end of the pressure-bearing device is connected to a web, and the web is arranged above the blade manufacturing mold. The outer support bracket is fixedly connected to the lower part of the connecting device, and the outer support bracket is arranged on both sides of the web. The positioning support is connected to the lower end of the gantry support, and the positioning support is arranged on both sides of the blade manufacturing mold.

[0009] Further, the pressure-bearing device includes a pressing-down device and a lifting device. The lifting device includes a cross beam, a lifting screw rod, and a lifting pull rod. The lifting screw rod is rotationally connected to the cross beam through a thread, the lifting screw rod is vertically arranged, the lifting screw rod penetrates through the cross beam, the lifting pull rod is rotationally connected to the lower end of the lifting screw rod, and a lifting block is arranged on the lifting pull rod. The pressing-down device includes a lower positioning bracket, an upper positioning bracket, and a pressing-down screw rod. The pressing-down screw rod is rotationally connected to the cross beam through a thread, the pressing-down screw rod is vertically arranged on both sides of the lifting screw rod, the upper positioning bracket is fixedly connected to the lower end of the pressing-down screw rod, and the lower positioning bracket is rotationally connected to the lower end of the upper positioning bracket through a bolt and a nut. The web is clamped between the lifting block and the lower positioning bracket.

[0010] Further, the connecting device includes a U-shaped bracket and a rotary connecting block. The gantry support and the rotary connecting block are arranged inside the U-shaped bracket. The rotary connecting block is rotationally connected to the gantry support through a pin shaft. The pin shaft penetrates through the U-shaped bracket, the rotary connecting block, and the gantry support, and the suspension beam frame is clamped between the rotary connecting blocks.

[0011] Further, the connecting device further includes a limit block, a plug pin, and a tension spring. The limit block is arranged inside the U-shaped bracket, the limit block is fixedly connected to the rotary connecting block, the plug pin penetrates through the U-shaped bracket, the upper part of the plug pin is inserted into the limit block, and the tension spring is arranged outside the U-shaped bracket. Both ends of the tension spring are connected to the U-shaped bracket and the lower part of the plug pin.

[0012] Further, the outer support bracket includes an ear and a fixing rod. The ear is fixedly connected to the lower part of the connecting device, and the fixing rod is rotationally connected to the lower part of the ear through a pin shaft.

[0013] Further, the outer support bracket further includes outer supports for the web. There are multiple outer supports for the web, which are symmetrically arranged on both sides of the web. The outer support for the web includes a guide block, a support screw, a roller, and a roller bracket. The roller is rotatably connected to the roller bracket by bolts and nuts. The roller is in contact with the outer surface of the web. The support screw is fixedly connected to the roller bracket. The support screw passes through the guide block and is slidably connected to the guide block. The guide block is fixedly connected to the fixed rod. There are two nuts connected to the support screw, and the two nuts are respectively arranged on both sides of the guide block.

[0014] Further, the positioning support includes a lower support plate, a support sleeve, and an upper support plate. There are two lower support plates arranged in parallel. A positioning plate is fixedly connected to the middle of the support sleeve. The positioning plate is arranged outside the support sleeve. The support sleeve is vertically inserted between the two lower support plates. The lower surface of the positioning plate is in contact with the upper surface of the lower support plate. The upper support plate is connected to the upper end of the support sleeve. A gantry bracket is fixedly connected above the upper support plate. The lower support plate is arranged on the truss of the wind turbine blade mold.

[0015] Further, a partition is provided inside the support sleeve. A positioning nut is fixedly connected to the lower end of the partition. An adjusting bolt is connected to the positioning nut. The adjusting bolt is arranged vertically upward. The adjusting bolt passes through the partition. A positioning plug is fixedly connected to the lower end of the upper support plate. The positioning plug is arranged inside the support sleeve. A positioning pin passes through the support sleeve and the positioning plug. The upper end surface of the adjusting bolt is in contact with the lower end surface of the positioning plug.

[0016] Further, the positioning support further includes a positioning bolt. The positioning bolt passes through the two lower support plates and the support sleeve. There are symmetrically arranged strip-shaped holes on the two lower support plates. The positioning bolt is movably connected in the strip-shaped holes. The positioning bolt is fixed on the lower support plate by a nut. There is a through hole on the support sleeve. The positioning bolt is clamped in the through hole.

[0017] Further, there are two webs. There are two downward pressing devices and two lifting blocks. The outer support bracket is arranged on both sides of the two webs. A support assembly is arranged between the two webs. The support assembly and the outer support for the web are in the same plane. The upper part of the fixed rod is connected to the pressure-bearing device by a quick clamp.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The pressure-bearing device is used to form a connection for the web, and at the same time, the lifting beam frame is used to form an integral hoisting of the web, which is convenient for the connection and hoisting of the web, and the position of the web in the front-back direction can be adjusted through the lifting beam frame;

[0020] 2. The connecting device is used to form a quick connection and fixation between the lifting beam frame and the gantry bracket;

[0021] 3. Adjust the position in the direction of the high part of the web through the pressure-bearing device, and at the same time, the downward pressure on the web can be realized, which can ensure better bonding of the web;

[0022] 4. Clamp the web through the external support bracket to ensure the overall verticality of the web and prevent it from bending;

[0023] 5. Use the positioning support to realize the position adjustment of the web in the left and right directions;

[0024] 6. By adding a small number of components according to the number of webs, the ability to install multiple webs simultaneously can be satisfied. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the overall front view structural schematic diagram of Embodiment 1 of the present invention;

[0026] Figure 2 is the front view structural schematic diagram of the pressure-bearing device of the present invention;

[0027] Figure 3 is the front view structural schematic diagram of the downward pressure device of the present invention;

[0028] Figure 4 is the left view structural schematic diagram of the downward pressure device of the present invention;

[0029] Figure 5 is the front view structural schematic diagram of the connecting device of the present invention;

[0030] Figure 6 is the top view structural schematic diagram of the connecting device of the present invention;

[0031] Figure 7 is the left view structural schematic diagram of the connecting device of the present invention;

[0032] Figure 8 is the front view structural schematic diagram of the external support bracket of the present invention;

[0033] Figure 9 is the front view structural schematic diagram of the web external support of the present invention;

[0034] Figure 10 is the top view structural schematic diagram of the web external support of the present invention;

[0035] Figure 11 is the front view structural schematic diagram of the positioning support of the present invention;

[0036] Figure 12 is Figure 11 the A-A sectional structural schematic diagram of the positioning support of the present invention;

[0037] Figure 13 is the overall front view structural schematic diagram of Embodiment 2 of the present invention.

[0038] In the figure: 1. Suspension beam frame, 2. Gantry support, 3. Connecting device, 301. U-shaped support, 302. Rotary connecting block, 303. Limit block, 304. Pin, 305. Tension spring, 4. Pressure-bearing device, 5. Outer support bracket, 501. Ear, 502. Fixed rod, 6. Positioning support, 601. Lower support plate, 602. Support sleeve, 603. Upper support plate, 604. Positioning plate, 605. Partition plate, 606. Positioning nut, 607. Adjusting bolt, 608. Positioning insertion plate, 609. Positioning pin, 610. Positioning bolt, 611. Strip-shaped hole, 612. Through hole, 7. Lower pressing device, 701. Lower positioning support, 702. Upper positioning support, 703. Lower pressing screw rod, 8. Lifting device, 801. Cross beam, 802. Lifting screw rod, 803. Lifting pull rod, 804. Lifting block, 9. Web, 10. Blade manufacturing mold, 11. Web outer support, 1101. Guide block, 1102. Support screw rod, 1103. Roller, 1104. Roller bracket, 12. Quick clamp. Detailed implementation mode

[0039] The present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation modes: A positioning and pressing device for a wind turbine blade includes a suspension beam frame 1 and a gantry support 2. Two gantry supports 2 are symmetrically arranged, and the suspension beam frame 1 is clamped between the two gantry supports 2. As is known from the prior art, the installation of the web 9 usually uses a suspension beam frame 1 as the main support body to form the connection and hoisting work of the web 9. Every two gantry supports 2 form a group, and multiple groups of gantry supports 2 can be set according to the length of the web 9 for installation. The present invention only describes the situation of a group of gantry supports 2 cooperating with other components. Since the usage principle structures of multiple groups of gantry supports 2 are the same, they are not shown in other group diagrams.

[0040] Embodiment 1:

[0041] As Figures 1-12 shown, a positioning and pressing device for a wind turbine blade further includes a connecting device 3, a pressure-bearing device 4, an outer support bracket 5 and a positioning support 6. The connecting device 3 is connected to the upper part of the gantry support 2, and the suspension beam frame 1 is clamped between the connecting devices 3. The connecting device 3 forms a quick connection function for the suspension beam frame 1, facilitating the hoisting of the web 9 and the fixation of the position in the front and rear directions.

[0042] Furthermore, the pressure-bearing device 4 is fixedly connected to the lower part of the suspension beam frame 1, the lower end of the pressure-bearing device 4 is connected to the web 9, and the web 9 is arranged above the blade manufacturing mold 10. The pressure-bearing device 4 forms a connection function between the web 9 and the suspension beam frame 1. At the same time, the self-weight of the pressure-bearing device 4 and the suspension beam frame 1 forms a downward pressure on the web, making the bonding of the web 9 more firm and reliable, and the pressure-bearing device 4 can realize the adjustment of the position of the web 9 in the up and down directions.

[0043] The further described outer support bracket 5 is fixedly connected below the connecting device 3, and the outer support bracket 5 is arranged on both sides of the web 9; the support bracket 5 forms a clamping effect on the web 9 to prevent the web 9 from deforming under the influence of pressure.

[0044] The further described positioning support 6 is connected to the lower end of the gantry bracket 2, and the positioning support 6 is arranged on both sides of the blade manufacturing mold 10; the positioning support 6 is used to adjust the position of the gantry bracket 2 as a whole in the left - right direction, and further realize the left - right position adjustment of the web 9.

[0045] Through the position adjustment in three degrees of freedom, the accuracy of the installation position of the web 9 is ensured, and the production quality of the wind turbine blade is improved.

[0046] The further described pressure - bearing device 4 includes a downward - pressing device 7 and a lifting device 8. The lifting device 8 includes a cross - beam 801, a lifting screw 802 and a lifting pull - rod 803. The lifting screw 802 is rotationally connected to the cross - beam 801 by threads. The lifting screw 802 is arranged vertically and penetrates through the cross - beam 801. The lifting pull - rod 803 is rotationally connected to the lower end of the lifting screw 802, and a lifting block 804 is arranged on the lifting pull - rod 803; turning the lifting screw 802 can drive the lifting pull - rod 803 to move up and down;

[0047] The further described downward - pressing device 7 includes a lower positioning bracket 701, an upper positioning bracket 702 and a downward - pressing screw 703. The downward - pressing screw 703 is rotationally connected to the cross - beam 801 by threads. The downward - pressing screw 703 is vertically arranged on both sides of the lifting screw 802. The upper positioning bracket 702 is fixedly connected to the lower end of the downward - pressing screw 703. The lower positioning bracket 701 is rotationally connected to the lower end of the upper positioning bracket 702 by bolts and nuts; turning the downward - pressing screw 703 can drive the lower positioning bracket 701 and the upper positioning bracket 702 to move up and down;

[0048] The further described web 9 is clamped between the lifting block 804 and the lower positioning bracket 701. The clamping of the upper end of the web 9 is completed through the lifting block 804 and the lower positioning bracket 701 to achieve fixed connection. And the lower positioning bracket 701 can rotate relative to the upper positioning bracket 702 by bolts and nuts, which is more convenient for the lower positioning bracket 701 to fit the upper end face of the web. At the same time, after the web 9 is connected, the relative position of the lower positioning bracket 701 and the upper positioning bracket 702 can be fixed and locked by bolts and nuts to prevent the web 9 from slipping out.

[0049] The further described connecting device 3 includes a U-shaped bracket 301 and a rotary connecting block 302. The gantry bracket 2 and the rotary connecting block 302 are arranged inside the U-shaped bracket 301. The rotary connecting block 302 is rotationally connected to the gantry bracket 2 through a pin shaft. The pin shaft penetrates through the U-shaped bracket 301, the rotary connecting block 302 and the gantry bracket 2. The hanging beam frame 1 is clamped between the rotary connecting blocks 302. Through the rotation of the rotary connecting blocks 302, a state of clamping and releasing the gantry bracket 2 is formed, which is convenient for the hoisting and connection fixation of the hanging beam frame 1. At the same time, it can ensure that the hanging beam frame 1 can move in the front-back direction between the gantry brackets in the released state to adjust the position of the web 9.

[0050] The further described connecting device 3 further includes a limit block 303, a bolt 304 and a tension spring 305. The limit block 303 is arranged inside the U-shaped bracket 301. The limit block 303 is fixedly connected to the rotary connecting block 302. The bolt 304 penetrates through the U-shaped bracket 301. The upper part of the bolt 304 is inserted into the limit block 303. The tension spring 305 is arranged outside the U-shaped bracket 301. Both ends of the tension spring 305 are connected to the U-shaped bracket 301 and the lower part of the bolt 304. The bolt 304 and the limit block 303 are used to form a limiting device for the rotary connecting block 302 to ensure stable connection. When it is necessary to open the rotary connecting block 302, the bolt 304 can be pulled out to rotate, and the bolt 304 can automatically reset under the action of the tension spring 305, and it can ensure that the bolt 304 will not come out in the limiting state.

[0051] The further described outer support bracket 5 includes an ear 501 and a fixed rod 502. The ear 501 is fixedly connected below the connecting device 3. The fixed rod 502 is rotationally connected below the ear 501 through a pin shaft. An external support for the web 9 is formed through the outer support bracket 5 to prevent it from bending under pressure.

[0052] The further described outer support bracket 5 further includes a web outer support 11. There are multiple web outer supports 11. The web outer supports 11 are symmetrically arranged on both sides of the web 9. The web outer support 11 includes a guide block 1101, a support screw 1102, a roller 1103 and a roller bracket 1104. The roller 1103 is rotationally connected to the roller bracket 1104 through bolts and nuts. The roller 1103 is in contact with the outer surface of the web 9. The support screw 1102 is fixedly connected to the roller bracket 1104. The support screw 1102 penetrates through the guide block 1101. The support screw 1102 is slidably connected to the guide block 1101. The guide block 1101 is fixedly connected to the fixed rod 502. Two nuts are connected to the support screw 1102. The two nuts are respectively arranged on both sides of the guide block 1101. By adjusting the position of the roller 1103, a clamping function for the web 9 on the symmetry plane at the same position is formed. After the web 9 is clamped in place, the support screw 1102 can be fixed to the guide block 1101 through the nuts to ensure the stable clamping of the web 9.

[0053] Furthermore, the positioning support 6 includes a lower support plate 601, a support sleeve 602, and an upper support plate 603. There are two parallel lower support plates 601. A positioning plate 604 is fixedly connected to the middle of the support sleeve 602. The positioning plate 604 is arranged outside the support sleeve 602. The support sleeve 602 is vertically inserted between the two lower support plates 601. The lower surface of the positioning plate 604 fits with the upper surface of the lower support plate 601. The upper support plate 603 is connected to the upper end of the support sleeve 602. A gantry bracket 2 is fixedly connected above the upper support plate 603. The lower support plate 601 is arranged on the wind turbine blade mold truss. The two lower support plates 601 are arranged in parallel on the wind turbine blade mold truss. The two lower support plates 601 form a fixed chute. Then the support sleeve 602 is vertically inserted between the two lower support plates 601. The support sleeve 602 can slide left and right on the lower support plate 601 by using the positioning plate 604, realizing the left and right movement of the upper support plate 603 and the gantry bracket 2 above the support sleeve 602, and further adjusting the position of the gantry bracket 2.

[0054] Furthermore, a partition 605 is arranged inside the support sleeve 602. A positioning nut 606 is fixedly connected to the lower end of the partition 605. An adjusting bolt 607 is connected to the positioning nut 606. The adjusting bolt 607 is arranged vertically upward. The adjusting bolt 607 penetrates through the partition 605. A positioning plug 608 is fixedly connected to the lower end of the upper support plate 603. The positioning plug 608 is arranged inside the support sleeve 602. A positioning pin 609 penetrates through the support sleeve 602 and the positioning plug 608. The upper end surface of the adjusting bolt 607 fits with the lower end surface of the positioning plug 608. The upper support plate 603 and the support sleeve 602 are connected and fixed as a whole by using the positioning pin 609 and the positioning plug 608, making the overall structure more stable. The positioning nut 606 plays a role in determining the position on the one hand and strengthening the structure on the other hand. By rotating the adjusting bolt 607 in the positioning nut 606 and cooperating with the positioning plug 604, the function of raising and lowering the upper support plate 603 is realized, and further the accurate installation work of the positioning pin 609 is realized.

[0055] Furthermore, the positioning support 6 further includes a positioning bolt 610. The positioning bolt 610 penetrates through the two lower support plates 601 and the support sleeve 602. Strip-shaped holes 611 are symmetrically arranged on the two lower support plates 601. The positioning bolt 610 is movably connected in the strip-shaped holes 611. The positioning bolt 610 is fixed on the lower support plate 601 by a nut. A through hole 612 is arranged on the support sleeve 602. The positioning bolt 610 is clamped in the through hole 612. By using the cooperation of the positioning bolt 610 and the long strip hole 611, the functions of moving and fixing the support sleeve 602 are completed, preventing the support sleeve 602 from shifting in position during work after moving to a suitable position.

[0056] Example Two:

[0057] As Figure 13 shown, there are two webs 9, two pressing devices 7 and lifting blocks 804. The outer support brackets 5 are arranged on both sides of the two webs 9. A support assembly is arranged between the two webs 9. The support assembly and the web outer support 11 are in the same plane. The upper part of the fixed rod 502 is connected to the pressure-bearing device 4 through a quick clamp 12. On the basis of Example One, the pressing device 7, the lifting block 804 and the support assembly are added to form the function of installing two webs 9 at the same time. The support device can adopt the support assembly disclosed in the Chinese utility model patent with the application number: CN201821174618.X and the patent name: A web adjusting device for a wind turbine blade. The quick clamp 12 can adopt the standard part GH-40370.

[0058] Example Three:

[0059] The principle and structure are basically the same as those of Example Two. The pressing device 7 and the lifting device 8 are added to connect more webs 9. The webs 9 are supported and connected by the support assembly to prevent the webs 9 from deforming.

[0060] The usage method and steps of the present invention are as follows:

[0061] Step 1: Use a crane to first lift the web 9 into the gantry bracket 2, then assemble the web 9 on the pressure-bearing device 4. At the same time, adjust the position of the web 9 in the front and rear directions, close the connecting device 3 to fix the hanging beam frame 1, and start the web assembly.

[0062] Step 2: Connect the outer support bracket 5 and the pressure-bearing device 6 with the quick clamp 12. For a single web 9, without using the support assembly, directly clamp the web 9 through the web outer support 11 on the outer support bracket 5, and adjust the verticality of the web 9. When installing two or more webs 9 at the same time, install the support assembly between multiple webs, and clamp the webs at the corresponding positions of the support assembly with the web outer support 11. At the same time, adjust the verticality of the web 9, and then adjust the height position of the web 9 through the pressing device 7 and the lifting device 8. At this time, the present invention and the web become an integral whole.

[0063] Step 3: Adjust the position of the web 9 in the left and right directions through the positioning support 6, then apply an adhesive to the lower end of the web 9 and bond it to the blade housing. Wait for the adhesive to completely cure, and loosen all the parts at the connecting parts of the web 9 to complete the positioning and pressing installation of the web 9.

Claims

1. A positioning and pressing-down device for a wind power blade, comprising a suspension beam frame (1) and a gantry support (2). Two gantry supports (2) are symmetrically arranged, and the suspension beam frame (1) is clamped between the two gantry supports (2). It is characterized in that: It further includes a connecting device (3), a pressure-bearing device (4), an external support bracket (5) and a positioning support (6). The connecting device (3) is connected to the upper part of the gantry support (2), and the suspension beam frame (1) is clamped between the connecting devices (3). The pressure-bearing device (4) is fixedly connected below the suspension beam frame (1). The lower end of the pressure-bearing device (4) is connected to a web (9), and the web (9) is arranged above a blade manufacturing mold (10). The external support bracket (5) is fixedly connected below the connecting device (3), and the external support bracket (5) is arranged on both sides of the web (9). The positioning support (6) is connected to the lower end of the gantry support (2), and the positioning support (6) is arranged on both sides of the blade manufacturing mold (10). The pressure-bearing device (4) includes a pressing-down device (7) and a lifting device (8). The lifting device (8) includes a cross beam (801), a lifting screw (802) and a lifting pull rod (803). The lifting screw (802) is rotationally connected to the cross beam (801) by threads. The lifting screw (802) is vertically arranged and penetrates through the cross beam (801). The lifting pull rod (803) is rotationally connected to the lower end of the lifting screw (802), and a lifting block (804) is arranged on the lifting pull rod (803). The pressing-down device (7) includes a lower positioning bracket (701), an upper positioning bracket (702) and a pressing-down screw (703). The pressing-down screw (703) is rotationally connected to the cross beam (801) by threads. The pressing-down screw (703) is vertically arranged on both sides of the lifting screw (802). The upper positioning bracket (702) is fixedly connected to the lower end of the pressing-down screw (703), and the lower positioning bracket (701) is rotationally connected to the lower end of the upper positioning bracket (702) by bolts and nuts. The web (9) is clamped between the lifting block (804) and the lower positioning bracket (701). The external support bracket (5) includes an ear (501) and a fixing rod (502). The ear (501) is fixedly connected below the connecting device (3), and the fixing rod (502) is rotationally connected to the lower part of the ear (501) by a pin shaft. The external support bracket (5) further includes external web supports (11). There are multiple external web supports (11), which are symmetrically arranged on both sides of the web (9). The external web support (11) includes a guide block (1101), a support screw (1102), a roller (1103) and a roller bracket (1104). The roller (1103) is rotatably connected to the roller bracket (1104) by bolts and nuts. The roller (1103) is in contact with the outer surface of the web (9). The support screw (1102) is fixedly connected to the roller bracket (1104). The support screw (1102) passes through the guide block (1101) and is slidably connected to the guide block (1101). The guide block (1101) is fixedly connected to the fixed rod (502). Two nuts are connected to the support screw (1102), and the two nuts are respectively arranged on both sides of the guide block (1101). The positioning support (6) includes a lower support plate (601), a support sleeve (602) and an upper support plate (603). There are two parallel lower support plates (601). A positioning plate (604) is fixedly connected to the middle of the support sleeve (602). The positioning plate (604) is arranged outside the support sleeve (602). The support sleeve (602) is vertically inserted between the two lower support plates (601). The lower surface of the positioning plate (604) is in contact with the upper surface of the lower support plate (601). The upper support plate (603) is connected to the upper end of the support sleeve (602). A gantry bracket (2) is fixedly connected above the upper support plate (603). The lower support plate (601) is arranged on the wind power blade mold truss.

2. The positioning and pressing-down device for a wind power blade according to claim 1, wherein: The connecting device (3) includes a U-shaped bracket (301) and a rotary connecting block (302). The gantry bracket (2) and the rotary connecting block (302) are arranged inside the U-shaped bracket (301). The rotary connecting block (302) is rotatably connected to the gantry bracket (2) by a pin shaft. The pin shaft passes through the U-shaped bracket (301), the rotary connecting block (302) and the gantry bracket (2). The lifting beam frame (1) is clamped between the rotary connecting blocks (302).

3. The positioning and pressing-down device for a wind power blade according to claim 2, wherein: The connecting device (3) further includes a limit block (303), a bolt (304) and a tension spring (305). The limit block (303) is arranged inside the U-shaped bracket (301). The limit block (303) is fixedly connected to the rotary connecting block (302). The bolt (304) passes through the U-shaped bracket (301). The upper part of the bolt (304) is inserted into the limit block (303). The tension spring (305) is arranged outside the U-shaped bracket (301). Both ends of the tension spring (305) are connected to the U-shaped bracket (301) and the lower part of the bolt (304).

4. The positioning and pressing-down device for a wind power blade according to claim 1, wherein: A partition plate (605) is arranged inside the support sleeve (602). A positioning nut (606) is fixedly connected to the lower end of the partition plate (605). An adjusting bolt (607) is connected to the positioning nut (606). The adjusting bolt (607) is arranged vertically upward. The adjusting bolt (607) penetrates through the partition plate (605). A positioning plug (608) is fixedly connected to the lower end of the upper support plate (603). The positioning plug (608) is arranged inside the support sleeve (602). A positioning pin (609) penetrates through the support sleeve (602) and the positioning plug (608). The upper end face of the adjusting bolt (607) is in contact with the lower end face of the positioning plug (608).

5. The positioning and pressing-down device for a wind power blade according to claim 1, characterized in that: The positioning support (6) further includes a positioning bolt (610). The positioning bolt (610) penetrates through the two lower support plates (601) and the support sleeve (602). Strip-shaped holes (611) are symmetrically arranged on the two lower support plates (601). The positioning bolt (610) is movably connected inside the strip-shaped holes (611). The positioning bolt (610) is fixed to the lower support plate (601) by a nut. A through hole (612) is arranged on the support sleeve (602). The positioning bolt (610) is clamped inside the through hole (612).

6. A wind power blade positioning and pressing-down device according to any one of claims 1-5, characterized in that: There are two webs (9). There are two downward pressing devices (7) and lifting blocks (804). The outer support bracket (5) is arranged on both sides of the two webs (9). A support assembly is arranged between the two webs (9). The support assembly and the web outer support (11) are in the same plane. The upper part of the fixing rod (502) is connected to the pressure-bearing device (4) through a quick clamp (12).

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