CN104265049B - The preparation method of glass fiber winding composite material taper electric pole - Google Patents

Abstract

The invention discloses a tapered electric pole made of glass fiber wound composite material, which comprises a root and a tip, the outer diameter of the root is larger than that of the tip, and the wall thickness of the root is larger than the wall of the tip Thick; also includes an equal-thickness layer on the inner side and a thickness gradient layer on the outer side, the equal-thickness layer is one of the non-alkali glass fiber direct yarn, the non-alkali glass fiber axial fabric and the non-alkali glass fiber multi-directional fabric Winding, the thickness gradient layer is an alkali-free glass fiber axial fabric or an alkali-free glass fiber multi-directional fabric, and the thickness gradient layer is an alkali-free glass fiber axial fabric or an alkali-free glass fiber multi-directional fabric The lay-up length of the fabric shrinks layer by layer from the tip to the root. The utility model can improve the utilization rate of the mechanical properties of the glass fiber and the production efficiency of the composite material tower, and reduce the manufacturing cost of the composite material transmission tower. The invention also discloses a preparation method for the tapered electric pole of the glass fiber wound composite material.

Description

Preparation method of glass fiber wound composite tapered electric pole

technical field

The invention relates to a glass fiber winding composite material conical electric pole and a preparation method thereof, belonging to the technical field of composite material transmission pole tower manufacturing for electric power grids.

Background technique

At present, the production processes of FRP tapered poles mainly include hand lay-up, pultrusion and winding. Hand lay-up requires a large number of high-priced fiber fabrics. Because it is difficult to form a uniform tension, the thickness increases and material waste is serious; and the electric poles produced by hand lay-up are rough in appearance and poor in quality stability. As labor costs continue to increase, it is difficult To continue. Pultrusion molding is suitable for the production of equal-diameter poles, but it is difficult to solve the problems of hoop force and pressure instability due to the inability to lay enough hoop fibers, so the structural stability of its products is poor. Using ordinary composite pipe winding machines to produce tapered poles with a taper (such as 1:75) cannot solve the problem of the same wall thickness, but what is actually required is that the wall thickness of the root is greater than that of the tip; the continuous variable Even if the angle-wound tapered pole can basically achieve the same wall thickness, the angle of fiber laying is not ideal, the uniformity of fiber laying is also poor, and the production efficiency is also very low.

Contents of the invention

The present invention aims at the deficiencies in the prior art, and provides a glass fiber-wound composite material conical pole, which can improve the utilization rate of the mechanical properties of glass fiber and the production efficiency of the composite material pole tower, and reduce the manufacturing cost of the composite material transmission pole tower , to meet the actual use requirements.

In order to solve the above problems, the technical scheme adopted in the present invention is as follows:

A glass fiber wound composite tapered pole, comprising: a root and a tip, the outer diameter of the root is greater than the outer diameter of the tip, and the wall thickness of the root is greater than the wall thickness of the tip; It includes a constant thickness layer on the inner side and a gradient thickness layer on the outer side, and the constant thickness layer is formed by winding one of E-glass fiber direct yarn, E-glass fiber axial fabric and E-glass fiber multi-directional fabric , the thickness gradient layer is formed by winding the non-alkali glass fiber axial fabric or the non-alkali glass fiber multidirectional fabric, and the laying of the non-alkali glass fiber axial fabric or the non-alkali glass fiber multidirectional fabric of the thickness gradient layer The layer length shrinks layer by layer from the tip to the root.

As an improvement of the above technical solution, the non-alkali glass fiber axial fabric or the non-alkali glass fiber multi-directional fabric of the thickness gradient layer overlaps by half when wound.

As an improvement of the above-mentioned technical scheme, the length of the non-alkali glass fiber axial fabric or the non-alkali glass fiber multi-directional fabric of the thickness gradient layer shrinks from the tip to the root is the same as that of the non-alkali glass fiber axial fabric. Or E-glass fiber multi-directional fabric with equal width.

As an improvement of the above technical solution, the width of the non-alkali glass fiber axial fabric or the non-alkali glass fiber multi-directional fabric of the thickness gradient layer is 200 mm.

As an improvement of the above technical solution, both the constant-thickness layer and the gradient-thickness layer use a one-component polyurethane resin as a curing matrix.

Another object of the present invention is to provide a method for preparing the above-mentioned tapered pole made of glass fiber wound composite material, comprising the following steps:

Step 1. Equipment and mold selection: Purchase a four-dimensional winding machine with a width of 200 mm. The diameter of the metal mold is twice the wall thickness of the corresponding part of the pole, and the surface is mirror polished;

Step 2. Equal-thickness layer winding: select one of E-glass fiber direct yarn, E-glass fiber axial fabric and E-glass fiber multi-directional fabric, and start cross-winding from the root;

Step 3. Winding of gradient layer of thickness: choose non-alkali glass fiber axial fabric or non-alkali glass fiber multi-directional fabric for winding, and the angle of winding laying is 80°～90°, non-alkali glass fiber axial fabric or non-alkali When the glass fiber multi-directional fabric is wound, half overlaps, and the length of the layup shrinks from the tip to the root layer by layer by 200 mm or more;

Step 4. Curing and post-processing: Curing in a curing oven at 60 degrees Celsius, then cutting, chamfering and surface finishing, and spraying a weather-resistant layer.

As an improvement of the above technical solution, the metal mold in the step 1 is deoiled before use to ensure cleanliness; and the metal mold is heated, the release wax is repeatedly applied three times, and wiped with a soft cloth so that the wax enters the surface of the mold .

As an improvement of the above technical solution, in the second step and the third step, the one-component polyurethane resin is used as the curing matrix, and the viscosity of the one-component polyurethane resin is maintained at 390-410 centipoise.

The present invention compares with prior art, and implementation effect of the present invention is as follows:

The glass fiber winding composite material tapered electric pole of the present invention can improve the utilization rate of the mechanical properties of glass fiber and the production efficiency of the composite material pole tower, reduce the manufacturing cost of the composite material pole tower, meet the actual use requirements, and is beneficial to speed up the production of composite material pole towers. The marketization process of transmission towers.

The preparation method of the tapered electric pole made of glass fiber winding composite material according to the present invention: a four-dimensional winding unit with a precision-manufactured yarn sheet width of 200 mm is used, and the non-alkali glass fiber is directly spun, the non-alkali glass fiber is axially or multi-directional Fabric and one-component polyurethane resin are the main materials. On the selected conical metal mold, the layering plan is designed according to the stress situation, and the cross and hoop fibers are laid in steps from the root to the tip to ensure that the wall thickness of the root is greater than tip, to achieve the purpose of economical manufacturing. If the axial bending modulus is less than 18 GPa, it can meet the requirements of use, and the direct yarn winding of alkali-free glass fiber can be used; otherwise, the axial fabric of alkali-free glass fiber or alkali-free glass fiber should be gradually extended from the root to the tip. Multi-directional fabrics; since all or most of them adopt the production method of direct yarn and wide yarn sheet with better tension, the utilization rate and production efficiency of fiber mechanical properties are improved, the cost is reduced, and the marketization process of composite poles is accelerated. Significant.

Description of drawings

Fig. 1 is the sectional structure schematic diagram of glass fiber winding composite tapered electric pole of the present invention;

Fig. 2 is a structural schematic diagram of half of the non-alkali glass fiber axial fabric or the non-alkali glass fiber multi-directional fabric of the thickness gradient layer being wound.

detailed description

The content of the present invention will be described below in conjunction with specific embodiments.

Specific embodiment one

As shown in Fig. 1 and Fig. 2, it is a schematic diagram of the structure of the tapered pole made of glass fiber wound composite material described in this embodiment. The tapered pole made of glass fiber wound composite material in this embodiment includes: a root 1 and a tip 2, the outer diameter of the root 1 is larger than the outer diameter of the tip 2, and the wall thickness of the root 1 is larger than the tip 2. The wall thickness of the tip portion 2; it also includes an equal-thickness layer 4 positioned on the inside and a thickness gradient layer 3 positioned on the outside, and the equal-thickness layer 4 is directly wound by an alkali-free glass fiber, and the thickness gradient layer 3 is The non-alkali glass fiber axial fabric or the non-alkali glass fiber multidirectional fabric is wound, and the lay-up length of the non-alkali glass fiber axial fabric or the non-alkali glass fiber multidirectional fabric of the thickness gradient layer 3 is determined by the slightly Part 2 shrinks layer by layer towards said root part 1 .

Preferably, the non-alkali glass fiber axial fabric or the non-alkali glass fiber multi-directional fabric of the thickness gradient layer 3 overlaps by half when wound. That is, the width D of the non-alkali glass fiber axial fabric or the non-alkali glass fiber multidirectional fabric shown in Fig. 2 is the width d of the non-covered part of the non-alkali glass fiber axial fabric or the non-alkali glass fiber multidirectional fabric 2 times. The length of the non-alkali glass fiber axial fabric or the non-alkali glass fiber multi-directional fabric of the thickness gradient layer 3 shrinks layer by layer from the tip 2 to the root 1 is the same as the length of the non-alkali glass fiber axial fabric or the non-alkali glass Fiber multidirectional fabrics are of equal width. The width of the non-alkali glass fiber axial fabric or the non-alkali glass fiber multi-directional fabric of the thickness gradient layer 3 is 200 mm. Both the constant-thickness layer 4 and the gradient-thickness layer 3 use one-component polyurethane resin as a curing matrix.

The preparation method of the glass fiber wound composite tapered electric pole described in this embodiment comprises the following steps:

Step 1. Purchase a four-dimensional winding machine with a yarn sheet width of 200 mm, and use as many servo motors with sufficient power as possible to ensure the accuracy of the execution system.

Step 2. The diameter of the metal mold should be twice the wall thickness than the outer diameter of the corresponding part of the pole, and the surface should be mirror polished. Degrease the mold before use to ensure it is clean. Heat the mold, apply the mold release wax repeatedly 3 times, and wipe it with a soft cloth to make the wax enter the surface of the mold as much as possible.

Step 3. According to the layup design, start from the root to cross-wind and wrap layers of equal thickness. The resin viscosity is kept at about 400 centipoise, and the amount of fiber tape glue is controlled to the minimum without scraping.

Step 4. For the thickness gradient layer, the axial or multi-directional fabrics laid at 90 degrees are mainly overlapped by half, so as to facilitate mechanical laying. The length of the layer gradually shrinks to the root by 200 mm or more, subject to the design requirements.

Step 5, curing in a curing oven at 60 degrees Celsius.

Step 6. Cutting, chamfering and surface finishing, spraying weather-resistant layer, packing for shipment.

Specific embodiment one

As shown in Fig. 1 and Fig. 2, it is a schematic diagram of the structure of the tapered pole made of glass fiber wound composite material described in this embodiment. The tapered pole made of glass fiber wound composite material in this embodiment includes: a root 1 and a tip 2, the outer diameter of the root 1 is larger than the outer diameter of the tip 2, and the wall thickness of the root 1 is larger than the tip 2. The wall thickness of the tip portion 2; also includes an equal thickness layer 4 positioned on the inside and a thickness gradient layer 3 positioned on the outside, and the equal thickness layer 4 is an alkali-free glass fiber axial fabric or an alkali-free glass fiber multi-directional fabric. One is wound, the thickness gradient layer 3 is an alkali-free glass fiber axial fabric or an alkali-free glass fiber multi-directional fabric, and the thickness gradient layer 3 is an alkali-free glass fiber axial fabric or an alkali-free The layup length of the glass fiber multi-directional fabric shrinks layer by layer from the tip 2 to the root 1 .

Preferably, the non-alkali glass fiber axial fabric or the non-alkali glass fiber multi-directional fabric of the thickness gradient layer 3 overlaps by half when wound. That is, the width D of the non-alkali glass fiber axial fabric or the non-alkali glass fiber multidirectional fabric shown in Fig. 2 is the width d of the non-covered part of the non-alkali glass fiber axial fabric or the non-alkali glass fiber multidirectional fabric 2 times. The length of the non-alkali glass fiber axial fabric or the non-alkali glass fiber multi-directional fabric of the thickness gradient layer 3 shrinks layer by layer from the tip 2 to the root 1 is the same as the length of the non-alkali glass fiber axial fabric or the non-alkali glass Fiber multidirectional fabrics are of equal width. The width of the non-alkali glass fiber axial fabric or the non-alkali glass fiber multi-directional fabric of the thickness gradient layer 3 is 200 mm. Both the constant-thickness layer 4 and the gradient-thickness layer 3 use one-component polyurethane resin as a curing matrix.

The preparation method of the tapered electric pole made of glass fiber wound composite material described in this embodiment is the same as that in the first embodiment.

The above content is a detailed description of the present invention in conjunction with specific embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the technical field of the present invention, without departing from the concept of the present invention, some simple deductions or substitutions can be made, which should be deemed to belong to the protection scope of the present invention.

Claims (3)

1. the preparation method of a glass fiber winding composite material taper electric pole, it is characterized in that, glass fiber winding composite material taper electric pole includes: root (1) and ending (2), the external diameter of described root (1) is more than the external diameter of described ending (2), and the wall thickness of described root (1) is more than the wall thickness of described ending (2)；Also include the equal thickness layer (4) being positioned at inner side and be positioned at the gradient thickness layer (3) in outside, described equal thickness layer (4) is that the one in the direct yarn of alkali-free glass fibre, alkali-free glass fibre axial fabrics and alkali-free glass fibre multidirectional fabric is entwined, described gradient thickness layer (3) is alkali-free glass fibre axial fabrics or alkali-free glass fibre multidirectional fabric is entwined, and the laying length of the alkali-free glass fibre axial fabrics of described gradient thickness layer (3) or alkali-free glass fibre multidirectional fabric is successively shunk to described root (1) by described ending (2)；Overlap half when the alkali-free glass fibre axial fabrics of described gradient thickness layer (3) or alkali-free glass fibre multidirectional fabric are wound around；The length that the alkali-free glass fibre axial fabrics of described gradient thickness layer (3) or alkali-free glass fibre multidirectional fabric are successively shunk to described root (1) by described ending (2) is equal with the width of alkali-free glass fibre axial fabrics or alkali-free glass fibre multidirectional fabric；The described alkali-free glass fibre axial fabrics of gradient thickness layer (3) or the width of alkali-free glass fibre multidirectional fabric are 200 millimeters；

And comprise the following steps:

Step one, equipment and mold select: buying yarn sheet width is the four-dimensional wrapping machine of 200 millimeters, the wall thickness of the diameter twice less than the external diameter of electric pole corresponding site of metal die, and surface mirror mirror polish processes；

Step 2, equal thickness layer are wound around: select the one in the direct yarn of alkali-free glass fibre, alkali-free glass fibre axial fabrics and alkali-free glass fibre multidirectional fabric, start cross winding from described root；

Step 3, gradient thickness layer are wound around: select alkali-free glass fibre axial fabrics or alkali-free glass fibre multidirectional fabric to be wound, and the angle being wound around lay is 80 °～90 °, overlap half when alkali-free glass fibre axial fabrics or alkali-free glass fibre multidirectional fabric are wound around, laying length is successively shunk 200 millimeters or more by described ending to described root；

Step 4, solidification and post processing: solidify in the curing oven of 60 degree Celsius, then cutting, chamfering and surfacing, spray weathering layer.

2. the preparation method of glass fiber winding composite material taper electric pole as claimed in claim 1, is characterized in that, metal die described in described step one to deoil before using, it is ensured that clean；And heat described metal die, repeatedly it is coated with three demoulding waxes, uses soft cloth wiping, in order to wax enters die surface.

3. the preparation method of glass fiber winding composite material taper electric pole as claimed in claim 1, it is characterized in that, in described step 2 and described step 3, with monocomponent polyurethane resin for solidification substrate, and the viscosity of monocomponent polyurethane resin is maintained at 390～410 centipoises.