阅读说明：本技术 一种混凝土用玄武岩纤维签及其制备装置 (Basalt fiber stick for concrete and preparation device thereof ) 是由 邵景干 王晓晓 王兆仑 张普 王俊超 原春园 黄运军 于 2019-10-28 设计创作，主要内容包括：本发明涉及一种混凝土用玄武岩纤维签及其制备装置,制备装置包括供玄武岩纤维束通过以在玄武岩纤维束外周包裹上包裹层的包胶装置,还包括设置于包胶装置下游的增强结构成型装置,增强结构成型装置包括至少一对冷压成型辊,冷压成型辊的外辊面上设有用于挤压所述包裹层以使包裹层外周成型出增强结构的成型凹陷或成型凸起,制备装置还包括位于所述增强结构成型装置下游的纤维束切段装置。本发明提供了一种可以提高与混凝土之间连接力的混凝土用玄武岩纤维签及制作该玄武岩纤维签的制备装置。(The invention relates to a basalt fiber swab for concrete and a preparation device thereof, wherein the preparation device comprises a rubber coating device for enabling a basalt fiber bundle to pass through so as to wrap a wrapping layer on the periphery of the basalt fiber bundle, and also comprises a reinforced structure forming device arranged at the downstream of the rubber coating device, the reinforced structure forming device comprises at least one pair of cold pressing forming rollers, forming depressions or forming bulges for extruding the wrapping layer to form a reinforced structure on the periphery of the wrapping layer are arranged on the outer roller surfaces of the cold pressing forming rollers, and the preparation device also comprises a fiber bundle section cutting device positioned at the downstream of the reinforced structure forming device. The invention provides a basalt fiber swab for concrete and a preparation device for manufacturing the basalt fiber swab, which can improve the connection force between the basalt fiber swab and the concrete.)

1. The basalt fiber swab for the concrete comprises a basalt fiber bundle and is characterized in that a wrapping layer wraps the periphery of the basalt fiber bundle, at least two reinforcing structures are arranged on the wrapping layer at intervals along the length direction of the basalt fiber bundle, and the reinforcing structures are protruding structures or recessed structures.

2. The basalt fiber pick for concrete according to claim 1, wherein: the reinforcing structure and the wrapping layer are integrally arranged.

3. The basalt fiber pick for concrete according to claim 2, wherein: the reinforcing structure and the wrapping layer are made of plastic materials with the melting temperature of more than 230 ℃.

4. The basalt fiber tape for concrete according to any one of claims 1 to 1 ~ 3, wherein the reinforcing structure is a convex structure, and a longitudinal cross-sectional shape of the convex structure is a trapezoid with a small outside and a large inside.

5. A basalt fiber swab manufacturing device for concrete according to claim 1 ~ 4, wherein the basalt fiber swab manufacturing device comprises an encapsulation device for enabling the basalt fiber tow to pass through so as to wrap a wrapping layer on the periphery of the basalt fiber tow, and the basalt fiber swab manufacturing device further comprises a reinforcing structure forming device arranged at the downstream of the encapsulation device, the reinforcing structure forming device comprises at least one pair of cold press forming rollers, forming concave or forming convex used for extruding the wrapping layer to enable the periphery of the wrapping layer to be formed into a reinforcing structure are arranged on the outer roller surface of each cold press forming roller, and the basalt fiber swab manufacturing device further comprises a fiber tow segmenting device located at the downstream of the reinforcing structure forming device.

6. The manufacturing apparatus according to claim 5, wherein: the preparation device also comprises a conveying device positioned between the rubber coating device and the reinforcing structure forming device, the conveying device comprises at least one pair of conveying rollers internally provided with heating devices, and the conveying rollers are provided with outer roller surfaces which are in friction rolling fit with the wrapping layers.

7. The manufacturing apparatus according to claim 5, wherein: the outer roll surface of the cold pressing forming roll is provided with the forming depressions, and the cross sections of the forming depressions are trapezoidal, wherein the outer portions of the forming depressions are larger than the inner portions of the forming depressions.

8. The manufacturing apparatus according to claim 7, characterized in that: the distance between the outer roll surfaces of the two cold-pressing forming rolls of the pair of cold-pressing forming rolls is smaller than the thickness of the wrapping layer on the upstream of the reinforcing structure forming device.

Technical Field

The invention relates to a basalt fiber swab for concrete and a preparation device thereof in the field of concrete construction.

Background

In the field of road construction and building, concrete is an indispensable engineering material, but the problems of workability, crack resistance, corrosion resistance and the like of the concrete material always trouble the engineering world. The concrete has the greatest defect of low tensile strength and is very easy to damage under the action of impact load.

This can be improved by adding fibers to the concrete, as disclosed in chinese patent CN109369050A "chopped basalt fiber bundles for reinforced cement concrete and method for making the same", where the basalt fiber bundles are dipped in water and then cut to form chopped fiber bundles of a certain length, and the tensile strength and crack resistance of the concrete are increased by mixing the chopped fiber bundles into the concrete. The problems existing in the prior art are that: the essence of the basalt fiber bundle for improving the tensile capacity of the concrete is that the tensile capacity of the basalt fiber bundle is utilized, so that high connecting force is required between the concrete and the basalt fiber, if the concrete and the basalt fiber are loosened, the tensile capacity of the basalt fiber cannot be applied to the concrete, and the tensile capacity between the basalt fiber bundle and the concrete in the prior art is limited.

Disclosure of Invention

The invention aims to provide a basalt fiber swab for concrete, which can improve the connection force between the basalt fiber swab and the concrete, and a preparation device for preparing the basalt fiber swab.

In order to solve the technical problems, the technical scheme of the basalt fiber swab for the concrete is as follows:

the basalt fiber swab for the concrete comprises a basalt fiber bundle, wherein a wrapping layer wraps the periphery of the basalt fiber bundle, at least two reinforcing structures are arranged on the wrapping layer at intervals along the length direction of the basalt fiber bundle, and the reinforcing structures are protruding structures or recessed structures.

The reinforcing structure and the wrapping layer are integrally arranged.

The reinforcing structure and the wrapping layer are made of plastic materials with the melting temperature of more than 230 ℃.

The reinforcing structure is a convex structure, and the longitudinal section of the convex structure is in a trapezoid shape with a small outer part and a large inner part.

The technical scheme of the preparation device provided by the invention is as follows:

the basalt fiber bundle production device comprises a rubber coating device for wrapping a wrapping layer on the periphery of the basalt fiber bundle, and further comprises a reinforcing structure forming device arranged on the downstream of the rubber coating device, wherein the reinforcing structure forming device comprises at least one pair of cold pressing forming rollers, the outer roller surface of each cold pressing forming roller is provided with a forming recess or a forming protrusion for extruding the wrapping layer to form a reinforcing structure on the periphery of the wrapping layer, and the production device further comprises a fiber bundle section cutting device positioned on the downstream of the reinforcing structure forming device.

The preparation device also comprises a conveying device positioned between the rubber coating device and the reinforcing structure forming device, the conveying device comprises at least one pair of conveying rollers internally provided with heating devices, and the conveying rollers are provided with outer roller surfaces which are in friction rolling fit with the wrapping layers.

The outer roll surface of the cold pressing forming roll is provided with the forming depressions, and the cross sections of the forming depressions are trapezoidal, wherein the outer portions of the forming depressions are larger than the inner portions of the forming depressions.

The distance between the outer roll surfaces of the two cold-pressing forming rolls of the pair of cold-pressing forming rolls is smaller than the thickness of the wrapping layer on the upstream of the reinforcing structure forming device.

The invention has the beneficial effects that: after the basalt fiber bundle passes through the glue coating device, the periphery of the basalt fiber bundle is coated with a coating layer, before the coating layer is completely cooled and shaped, the coating layer is extruded through a cold pressing forming roller of the reinforced structure forming device, so that a forming recess or a forming protrusion is formed on the periphery of the coating layer, then the basalt fiber bundle is cut into a section of basalt fiber swab by the fiber bundle cutting device, at least two reinforced structures are arranged on the coating layer of each basalt fiber swab, after the basalt fiber swab is mixed into concrete, and after the concrete is cured, a stopping force along the length direction of the basalt fiber swab is generated between the reinforced structures and the concrete, so that the connecting force between the basalt fiber swab and the concrete is greatly improved, the tensile capacity of the basalt fiber can be fully exerted, and the tensile resistance of the concrete is ensured.

Drawings

FIG. 1 is a schematic structural view of one embodiment of a production apparatus in the present invention;

FIG. 2 is a schematic structural view of a basalt fiber pick for concrete according to the present invention;

fig. 3 is a schematic view of the basalt fiber swab and concrete in accordance with the present invention.

Detailed Description

An example of the device for preparing the basalt fiber swabs for concrete is shown in fig. 1 ~ 3, and comprises an encapsulating device 3, a conveying device 6, a reinforcing structure forming device 8 and a fiber bundle cutting device 11 which are arranged in sequence along the conveying direction of the basalt fiber bundles.

The rubber coating device belongs to the prior art, is a common cable rubber coating machine and comprises a rubber coating device seat 5, wherein a fiber bundle channel 2 for a basalt fiber bundle 1 to pass through is arranged on the rubber coating device seat, a rubber injection channel is arranged on the periphery of the fiber bundle channel 3 and is communicated with the fiber bundle channel, the basalt fiber bundle passes through the fiber bundle channel when in use, molten rubber solution 4 enters the fiber bundle channel through the rubber injection channel and is coated on the periphery of the fiber bundle to form a coating layer 14, in the embodiment, the coating layer is made of plastic materials with the temperature of more than 230 ℃, for example, PP and PET, the temperature is kept at 170 ~ 190 ℃ after the coating layer is coated on the basalt fiber bundle, and the temperature is called as a forming temperature, when no external force is applied, the coating layer is not deformed, and when the external force is applied, the coating layer can be deformed.

Conveying device 6 includes that at least a pair of can be relatively the pivoted be equipped with heating device's conveying roller 7 in, conveying roller 7 has and is used for rolling complex outer roller surface with the friction of parcel layer, and heating device heats the conveying roller, keeps the temperature of conveying roller at 170 ~ 190 ℃, and when the conveying roller carried the tow, also can heat the parcel layer, guarantees the temperature when the parcel layer reachs reinforcing structure forming device.

The reinforced structure forming device 8 comprises a pair of cold pressing forming rollers 9 which rotate relatively under the drive of a driving mechanism, the outer roller surfaces of the cold pressing forming rollers are provided with a forming recess 10 for forming the reinforced structure on the periphery of the wrapping layer, the cross section of the forming recess 10 is in a trapezoid shape with a large outer part and a small inner part, and the distance between the outer roller surfaces between the two cold pressing forming rollers is smaller than the thickness of the wrapping layer on the upper stream of the reinforced structure forming device. When the basalt fiber bundle wrapped with the wrapping layer passes between the two cold-pressing forming rollers, the basalt fiber bundle is firstly extruded by the outer roller surface between the two cold-pressing forming rollers, the diameter of the wrapping layer is reduced, the process aims to enable the wrapping layer and the basalt fiber bundle to be combined more tightly, and because in the rubber coating process of the rubber coating device, the pressure between the wrapping layer and the basalt fiber bundle is not particularly large, and the glue solution is automatically wrapped on the basalt fiber bundle. In addition, set up the shaping and cave in and also can reduce the restriction to parcel layer thickness for can reduce two interval between the forming roll of colding pressing, if set up in the periphery of the forming roll of colding pressing and be used for extrudeing the parcel layer so that parcel layer periphery forms the shaping arch of sunk structure, because the shaping arch occupies certain thickness, and the thickness of parcel layer itself is limited, just can't reduce two interval between the forming roll of colding pressing.

The basalt fiber bundle is finally shaped by reducing the temperature of the wrapping layer extruded by the cold press forming rollers, the wrapping layer is cut into a section of basalt fiber bundle 15 after passing through a fiber bundle section cutting device, the cutting device 11 comprises a pair of roller cutters 12 which rotate relatively, the basalt fiber bundle is cut off by relatively rotating the roller cutters 12, the diameter of the final basalt fiber bundle is 1 ~ 3mm, the length of the final basalt fiber bundle is 2 ~ 4cm, each basalt fiber bundle 15 comprises a fiber bundle 1 and a wrapping layer 14 wrapping the periphery of a limiting bundle, and two ends of the wrapping layer 14 are provided with reinforcing structures 13 with two protruding structures.

The basalt fiber bundle is mixed in the concrete, the adding proportion of the basalt fiber bundle is 6% ~%, after the concrete 16 is cured, the reinforcing structure 13 and the concrete 16 have strong connecting force, the tensile capacity of the basalt fiber bundle can be completely acted on the concrete, and the tensile capacity, the anti-cracking capacity and other characteristics of the concrete are greatly improved.

An example of the basalt fiber tip for concrete is shown in fig. 1 ~ 3, and the specific structure of the basalt fiber tip is the same as that of the basalt fiber tip described in the above-described embodiments of the manufacturing apparatus, and will not be described in detail here.