CN102644739B - A kind of encapsulating method of connecting flange and wind-driven generator - Google Patents

Abstract

The invention provides a method for sealing a connecting flange and a wind power generator, wherein the method for sealing a connecting flange includes: applying a sealant to the butt joints of the connecting flange; wrapping and pressing the sealant with an adhesive tape . In the sealing method for the connecting flange of the wind power generator provided by the present invention, the sealant is applied to the butt joint of the connecting flange to prevent external water from entering the tower through the butt joint of the connecting flange Then use the adhesive tape to tightly wrap the sealant to prevent the sealant from being eroded or air-dried and detached. Erosion or immersion by stagnant water.

Description

A sealing method of connecting flange and wind power generator

technical field

The invention relates to the technical field of wind power generation, in particular to a sealing method for a connecting flange and a wind power generator.

Background technique

As a clean and renewable energy, wind energy has been paid more and more attention by countries all over the world. my country is rich in wind energy resources, and the potential for generating electricity from wind energy is huge.

Fig. 1 is a schematic structural diagram of an existing wind power generator. As shown in Figure 1, the wind generator includes: blades 101, hub 102, electrical equipment 103, tower 104, connecting flange 105 and tower base 106, blades 101 are installed on hub 102, and the wind blows at a certain angle and speed. Acting on the blade 101, the blade 101 generates a rotational torque and rotates, thereby converting the wind energy into mechanical energy. The rotating blade 101 will drive the generator in the electrical equipment 103 to generate electricity, and the mechanical energy is converted into electrical energy. The tower 104 is connected through the The flange 105 is fixedly connected with the anchor steel cylinder 107 on the tower base 106 . Wind turbines are usually installed in grasslands, seaside and other places with sufficient wind energy. These places are usually low-lying, and external water such as rain, snow or sea water can easily enter the tower through the joints between the connecting flanges 105, resulting in The electrical equipment 103 is damaged or short-circuited, resulting in loss.

In the prior art, the height of the connecting flange 105 is raised by raising the height of the tower base 106, or the height of the connecting flange 105 is raised by improving the design of the structure of the tower 104. The height of the flange 105 is limited, which cannot prevent external accumulated water such as rainwater, snow water or sea water from easily entering the tower through the butt joint between the connecting flanges 105 .

Contents of the invention

In order to solve the above problems, the present invention provides a sealing method of a connecting flange and a wind power generator, which are used to solve the problem in the prior art that external accumulated water easily enters the tower through the butt joint of the connecting flange.

To this end, the present invention provides a sealing method for connecting flanges, which includes:

Apply sealant to the butt joints of the connecting flanges;

Wrap the sealant with adhesive tape.

Wherein, it also includes: using a protective plate to wrap and press the sticking tape.

Wherein, the protective plate is a corrugated protective plate.

It also includes: welding a circle of welding blocks on the bottom of the tower and the upper part of the anchor steel cylinder, the welding blocks are provided with threaded holes for fixing the protective plate, and the protective plate is fixedly connected to the welding block by bolts .

Wherein, the thickness of the sticking tape is greater than the height of the welding block protruding vertically from the bottom of the tower or the anchoring steel cylinder.

Wherein, the adhesive tape is a rubber plate coated with adhesive on one side, and the peeling strength of the adhesive is greater than or equal to 25 N/mm.

Wherein, the rubber sheet includes: EPDM rubber or nitrile rubber.

Wherein, the sealant includes: polyurethane or silica gel.

Wherein, the connecting flange is used for the fixed connection between the tower and the anchor steel cylinder in the wind power generator.

The present invention also provides a wind power generator, including blades, hubs, electrical equipment, towers, connecting flanges, anchoring steel cylinders and tower bases, characterized in that:

The butt joints of the connecting flanges are coated with sealant;

The sealant is wrapped around the adhesive tape.

The present invention has following beneficial effect:

In the sealing method of the connecting flange provided by the present invention, a sealant is applied to the butt joint of the connecting flange to prevent external water from entering the tower through the butt joint of the connecting flange, and then an adhesive tape is used to Tightly wrap and press the sealant to prevent the sealant from being eroded or air-dried and detached. At the same time, the adhesive tape can further prevent accumulated water from entering the interior of the tower from the butt joints, thereby protecting the electrical equipment inside the tower from erosion by accumulated water or soak.

Description of drawings

Fig. 1 is the structural representation of existing wind power generator;

Fig. 2 is the flow chart of the first embodiment of the sealing method of coupling flange provided by the present invention;

Fig. 3A is a schematic diagram of the sealing structure in the sealing method for connecting flanges provided by the present invention;

Fig. 3B is a sectional view of A-A direction in Fig. 3A;

Fig. 4 is the flow chart of the second embodiment of the sealing method of coupling flange provided by the present invention;

Fig. 5 A is the sectional view of B-B direction among Fig. 3 B;

Fig. 5B is an enlarged schematic view at position I in Fig. 5A;

Fig. 5C is an enlarged schematic view at position II in Fig. 5A;

Fig. 5D is a perspective view of the protective plate in Fig. 5A.

Detailed ways

In order for those skilled in the art to better understand the technical solution of the present invention, the method for sealing the connecting flange and the wind power generator provided by the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 2 is the flow chart of the first embodiment of the sealing method of the connecting flange provided by the present invention,

Fig. 3A is a schematic diagram of the sealing structure in the sealing method for connecting flanges provided by the present invention, and Fig. 3B is a cross-sectional view along the direction A-A in Fig. 3A. As shown in Figure 2, the specific process of the first embodiment of the sealing method for connecting flanges provided by the present invention includes:

Step 201 , coating the sealant on the butt joints of the connecting flanges.

As shown in Fig. 3A, 3B and in combination with Fig. 1, firstly, a circle of welding nuggets is respectively welded on the lower part of the tower tube 104 and the upper part of the anchoring steel cylinder 107. The material of the welding nuggets can be corrosion-resistant metal materials such as stainless steel, and the welding nuggets are provided with Multiple threaded holes, the threaded holes can be used to fix protective plates, billboards, etc. through corresponding bolts. The connecting flange 105 is used to fixedly connect the tower tube 104 of the wind power generator to the anchor steel tube 107 on the tower base 106, and a layer of sealant is applied to the butt joint of the connecting flange 105 to make the butt joint Seal it to prevent external accumulated water from entering, and then go to step 202.

Step 202, wrapping and pressing the sealant with an adhesive tape.

Use an adhesive tape to tightly wrap the sealant at the joint of the connecting flange 105 to further seal the joint to prevent external water from entering the tower 104 , and then proceed to step 203 .

In practical applications, the adhesive tape can be a rubber tape with an adhesive on one side, and the rubber tape can be made of EPDM foam rubber or nitrile rubber, etc. And paste tape, so that the butt seam of connecting flange 105 keeps sealing well, wherein, the width of paste tape in the direction parallel to the central axis of tower 104 is greater than the distance between two circles of welding blocks.

Step 203, wrapping and pressing the sticking tape with a protective plate.

In the sealing method of the connecting flange provided by the present invention, a sealant is applied to the butt joint of the connecting flange to prevent external water from entering the tower through the butt joint of the connecting flange, and then an adhesive tape is used to Tightly wrap and press the sealant to prevent the sealant from being eroded or air-dried and detached. At the same time, the adhesive tape can further prevent accumulated water from entering the interior of the tower from the butt joints, thereby protecting the electrical equipment inside the tower from erosion by accumulated water or soak.

Fig. 4 is a flow chart of the second embodiment of the sealing method for connecting flanges provided by the present invention, Fig. 5A is a cross-sectional view in the direction of B-B in Fig. 3B, Fig. 5B is an enlarged schematic diagram at position I in Fig. 5A, and Fig. 5C is Fig. 5A The enlarged schematic diagram of position II in the center, and FIG. 5D is a perspective view of the protective plate in FIG. 5A. As shown in Figure 4, the specific process of the sealing method of the connecting flange provided by the present invention includes the following steps:

Step 401, welding a circle of welding blocks on the lower part of the tower tube and the upper part of the anchor steel tube respectively.

In this embodiment, the technical scheme of the present invention is introduced by taking the structural diagram of the sealing part as shown in Figures 5A, 5B, 5C and 5D as an example, and in combination with Figures 3A, 3B and Figure 1, the tower 104 and the anchoring steel are set The diameter of the tube 107 is 4.2m, and a circle of welding nuggets 504 are respectively welded on the lower part of the tower tube 104 and the upper part of the anchoring steel tube 107, and the welding nuggets 504 protrude vertically from the surface of the tower tube 104 or the surface of the anchoring steel tube 107 The height of the welding block 504 can be 15mm, and the distance between the two rings of welding blocks 504 in the direction parallel to the central axis of the tower tube 104 is 460mm. The material of the welding blocks 504 can be corrosion-resistant metal materials such as stainless steel. The threaded holes for fixing the protective plate 503 may be, for example, M12 threaded holes, and the pitch of the threaded holes may be set to 250mm. Then, go to step 402 .

Step 402, install the tower tube of the wind power generator on the tower base through the connecting flange.

Fix the tower tube 104 on the anchor steel tube 107 of the tower base 106 through the connecting flange 105 , the connecting flange 105 is fixed by bolts, and the bolts fixing the connecting flange 105 are located in the tower tube, and then go to step 403 .

Step 403 , coating the sealant on the butt joints of the connecting flanges.

In this embodiment, polyurethane or silica gel can be used as the sealant 501 , and the sealant 501 is applied to the butt joint of the connecting flange 105 , and then step 404 is performed.

Step 404 , using adhesive tape to wrap and press the sealant.

In this embodiment, the sticking tape 502 can be a rubber plate coated with glue on one side or other flexible plates with waterproof function. The rubber plate can be prepared from EPDM rubber or nitrile rubber. The sticking tape 502 The width range is more than 500mm, and the width of adhesive tape 502 is 510mm in the present embodiment, and the peeling strength of the adhesive glue on adhesive tape 502 should be greater than or equal to 25N/mm, adopt adhesive tape 502 to wrap and compress sealant 501, adhesive tape The thickness of 502 is slightly greater than the height of welding block 504 vertically protruding from the surface of tower tube 104 or vertically protruding from the surface of anchoring steel cylinder 107, for example, the height of welding block 504 vertically protruding from the surface of tower tube 104 or vertically protruding from the surface of anchoring steel cylinder 107 When it is 15mm, the thickness of the adhesive tape 502 can be 16mm, so that after the protective plate 503 is fixed on the welding block 504, the protective plate 503 can compress the adhesive tape 502, so that the sealing of the connecting flange 105 to the seam is tighter , and then go to step 405.

Step 405 , wrapping and pressing the adhesive tape with a protective plate.

Referring to Fig. 5D, the protective plate 503 in the present embodiment is corrugated, and is made of stainless steel plate with uniform thickness and strong corrosion resistance. The protective plate 503 is usually a steel plate with a thickness of 1-2 mm, and the width of the protective plate 503 and the adhesive tape The width of 502 is equal, and the width range of both is more than 500mm. In this embodiment, the width of protective plate 503 and adhesive tape 502 is 510mm. Protective plate 503 includes horizontal part 5031 and raised corner part 5032. The length of the horizontal part 5031 is set to 50mm. The corner part 5032 of the protective plate 503 is obtained by folding the stainless steel plate. The corner part 5032 is an isosceles triangle. In practical applications, the height of the isosceles triangle is Between 10～100mm, the length of the base is between 10～300mm. In this embodiment, the height of the isosceles triangle is 40mm, and the length of the base of the isosceles triangle is 50mm. The two rows of round holes 5033 corresponding to the threaded holes, the distance between the two rows of round holes 5033 is equal to the distance between the two circles of welding blocks 504, and the anti-theft bolt 505 is protected by the round holes 5033 and the threaded holes on the welding blocks 504 The plate 503 is fixed on the welding block 504. Since the thickness of the pasting plate 502 is slightly greater than the height of the welding block 504 protruding vertically from the surface of the tower tube 104 or the surface of the anchoring steel cylinder 107, the protective plate 503 is fixed on the welding block 504. , the protective plate 503 tightly compresses the pasting board 502 , thereby effectively preventing accumulated water from soaking the sealant 501 through the pasting tape 502 . The protective plate 503 in this embodiment adopts a corrugated shape. In practical applications, the protective plate 503 can also use a protective plate with a protruding structure other than corrugated to reduce its own deformation. When the position of the flange 105 changes, the shear force generated by the connecting flange 105 on the protective plate 503 and the anti-theft bolt 505 can be eliminated, which not only improves the life of the connecting flange 105, but also keeps the joints of the connecting flange 105 in a sealed state. Effectively prevent stagnant water from entering.

In the sealing method of the connecting flange provided by the present invention, a sealant is applied to the butt joint of the connecting flange to prevent external water from entering the tower through the butt joint of the connecting flange, and then an adhesive tape is used to Tightly wrap and press the sealant to prevent the sealant from being eroded or air-dried and detached. At the same time, the adhesive tape can further prevent accumulated water from entering the interior of the tower from the butt joints, thereby protecting the electrical equipment inside the tower from erosion by accumulated water or Soaking, by fixing the corrugated protective plate around the adhesive tape to further prevent external water from entering the inside of the tower, and at the same time eliminate the shear force generated by the connecting flange on the protective plate 503 and the anti-theft bolt.

The present invention also provides a wind power generator, including blades, hubs, electrical equipment, towers, connecting flanges and tower bases, etc., wherein the joints of the connecting flanges are sealed by the above-mentioned sealing method of the connecting flanges. Sealed, the specific content will not be repeated here.

It can be understood that, the above embodiments are only exemplary embodiments adopted for illustrating the principle of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims (7)

1. an encapsulating method for connecting flange, is characterized in that, comprising:

Sealer is coated in the butt joint place of connecting flange;

Adhesive band is adopted to twine the described sealer of pressure;

Protection apron is adopted to twine the described adhesive band of pressure;

Described protection apron is corrugated protection apron, and comprise horizontal component and protruding faceted portions, described faceted portions is isosceles triangle;

Bottom tower cylinder, weld a lap welding block respectively with anchoring steel cylinder top, described welding block is provided with the tapped hole for fixing described protection apron, described protection apron is fixedly connected with described welding block by bolt.

2. the encapsulating method of connecting flange according to claim 1, is characterized in that,

The thickness of described adhesive band is greater than described welding block and vertically protrudes bottom tower cylinder or the height of anchoring steel cylinder.

3. the encapsulating method of connecting flange according to claim 1, is characterized in that,

Described adhesive band is the rubber plate of one side coating adhesive glue, and the peeling strength of described glue is more than or equal to 25N/mm.

4. the encapsulating method of connecting flange according to claim 3, is characterized in that, described rubber plate comprises: ethylene propylene diene rubber or nitrile butadiene rubber.

5. the encapsulating method of connecting flange according to claim 1, is characterized in that, described sealer comprises: polyurethane or silica gel.

6. according to the encapsulating method of the connecting flange in claim 1-5 described in any one, it is characterized in that, described connecting flange is used for being fixedly connected with between tower cylinder and anchoring steel cylinder in wind-driven generator.

7. a wind-driven generator, comprise blade, wheel hub, electrical equipment, tower cylinder, connecting flange, anchoring steel cylinder and column foot, it is characterized in that, described wind-driven generator also comprises:

Sealer, described sealer is coated in the butt joint place of described connecting flange;

Adhesive band, described adhesive band twines the described sealer of pressure;

Protection apron, described protection apron twines the described adhesive band of pressure, and described protection apron is corrugated protection apron, and it comprises horizontal component and protruding faceted portions, and described faceted portions is isosceles triangle;

Welding block, the described welding block of a circle is welded on bottom described tower cylinder and anchoring steel cylinder top respectively, and described welding block is provided with the tapped hole for fixing described protection apron, described protection apron is fixedly connected with described welding block by bolt.