CN110590185A - A basalt fiber stick for concrete and its preparation device - Google Patents

Abstract

The invention relates to a basalt fiber stick for concrete and a preparation device thereof. The preparation device includes a rubber wrapping device for passing the basalt fiber bundle to wrap the upper wrapping layer on the outer periphery of the basalt fiber bundle, and also includes a reinforcing structure forming device arranged downstream of the glue wrapping device The device, the reinforcing structure forming device includes at least one pair of cold forming rolls, the outer roll surface of the cold forming rolls is provided with forming depressions or forming protrusions for extruding the wrapping layer so that the outer periphery of the wrapping layer forms a reinforcing structure, The preparation device also includes a fiber bundle cutting device located downstream of the reinforcing structure forming device. The invention provides a basalt fiber stick for concrete that can improve the connection force with concrete and a preparation device for making the basalt fiber stick.

Description

A basalt fiber stick for concrete and its preparation device

technical field

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

Background technique

In the field of road construction and construction, concrete is an essential engineering material, but the workability, crack resistance and corrosion resistance of concrete materials have always plagued the engineering field. The biggest defect of concrete itself is that its tensile strength is low, and it is easily damaged under impact load.

This situation can be improved by adding fibers to concrete, as disclosed in Chinese patent CN109369050A "chopped basalt fiber bundles for strengthening cement concrete and its preparation method", the basalt fiber bundles are dipped in glue, and then cut to form certain Length of chopped fiber bundles, by mixing chopped fiber bundles in concrete to increase the tensile strength and crack resistance of concrete. The problem in the prior art is that the essence of increasing the tensile capacity of concrete with basalt fiber bundles is to use the tensile capacity of basalt fiber bundles itself, which requires a high connection force between concrete and basalt fibers. If concrete and basalt fibers If there is looseness between them, the tensile capacity of the basalt fiber will not act on the concrete, and the tensile capacity between the basalt fiber bundle and the concrete in the prior art is limited.

Contents of the invention

The purpose of the present invention is to provide a basalt fiber stick for concrete that can improve the connection force between the concrete and the purpose of the present invention is also to provide a preparation device for making the basalt fiber stick.

In order to solve the problems of the technologies described above, the technical scheme of the basalt fiber stick for concrete in the present invention is as follows:

A basalt fiber stick for concrete, comprising basalt fiber bundles, the outer periphery of the basalt fiber bundles is wrapped with a wrapping layer, and at least two reinforcing structures are arranged at intervals along the length direction of the basalt fiber bundles on the wrapping layer, and the reinforcing structures are convex structures or sunken structure.

The reinforcing structure is integrally arranged with the wrapping layer.

The reinforcement structure and wrapping are made of plastic material with a melting temperature above 230°C.

The reinforcing structure is a protruding structure, and the longitudinal section shape of the protruding structure is a trapezoid with a small outside and a big inside.

The technical scheme of preparation device among the present invention is:

It includes a rubber covering device for the basalt fiber bundle to wrap the upper wrapping layer on the outer periphery of the basalt fiber bundle, and a reinforced structure forming device arranged downstream of the rubber covering device. The reinforced structure forming device includes at least a pair of cold forming rolls. The outer roller surface of the forming roller is provided with a forming depression or a forming protrusion for extruding the wrapping layer so that the outer periphery of the wrapping layer forms a reinforcing structure, and the preparation device also includes a fiber bundle cut segment located downstream of the reinforcing structure forming device device.

The preparation device also includes a conveying device located between the encapsulating device and the reinforcing structure forming device. The conveying device includes at least one pair of conveying rollers provided with a heating device inside. Outer roll surface.

The outer roll surface of the cold forming roll is provided with the forming depression, and the cross-sectional shape of the forming depression is a trapezoid with a large outside and a small inside.

The outer roll surface spacing between the two cold forming rolls of the pair of cold forming rolls is smaller than the wrap thickness upstream of the reinforcing structure forming device.

The beneficial effects of the present invention are as follows: after the basalt fiber bundle passes through the encapsulating device, the outer periphery is wrapped with a wrapping layer, and before the wrapping layer is completely cooled and shaped, the wrapping layer is extruded by the cold-press forming roller of the reinforced structure forming device. Pressing, so that the outer periphery of the wrapping layer is formed into a molding depression or a molding protrusion, and then the basalt fiber bundle is cut into a section of basalt fiber swab by the fiber bundle cutting device, and each basalt fiber swab is provided with at least two reinforcements on the wrapping layer. structure, after such basalt fibers are mixed into the concrete, after the concrete is cured, a blocking force along the length direction of the basalt fibers is generated between the reinforced structure and the concrete, which greatly improves the connection force between the basalt fibers and the concrete, which can Give full play to the tensile capacity of basalt fibers, thereby ensuring the tensile strength of concrete.

Description of drawings

Fig. 1 is the structural representation of an embodiment of preparation device among the present invention;

Fig. 2 is the structural representation of concrete basalt fiber sign among the present invention;

Fig. 3 is a schematic diagram of cooperation between basalt fiber sticks and concrete in the present invention.

Detailed ways

The embodiment of the preparation device of basalt fiber sticks for concrete is shown in Figures 1 to 3: it includes the encapsulating device 3, the conveying device 6, the reinforced structure forming device 8 and the fiber bundle cutting device 11 arranged in sequence along the conveying direction of the basalt fiber bundle .

Wherein the gluing device belongs to the prior art, the more common one is a cable gluing machine, which includes a gluing device seat 5, on which the basalt fiber bundle 1 is provided with a fiber bundle passage 2 and a fiber bundle passage 3 There is a glue injection channel on the periphery, and the glue injection channel communicates with the fiber bundle channel. When in use, the basalt fiber bundle passes through the fiber bundle channel, and the melted glue 4 enters the fiber bundle channel through the glue injection channel and wraps around the fiber bundle, thus forming The wrapping layer 14, in this embodiment, the wrapping layer is made of plastic material with a temperature above 230°C, such as PP and PET. After the wrapping layer is wrapped on the basalt fiber bundle, the temperature is kept at 170~190°C, which is called the molding temperature. When there is no external force, the wrapping layer will not deform, but when external force is applied, the wrapping layer will deform.

The conveying device 6 comprises at least one pair of conveying rollers 7 that are provided with a heating device that can rotate relatively. The conveying rollers 7 have an outer roller surface that is used to frictionally and rollingly cooperate with the wrapping layer. The heating device heats the conveying rollers to maintain the temperature of the conveying rollers. At 170~190°C, while the conveying roller is transporting the fiber bundle, it can also heat the wrapping layer to ensure the temperature of the wrapping layer to the top reinforcement structure forming device.

The reinforcing structure forming device 8 comprises a pair of cold pressing forming rolls 9 which rotate relatively under the drive of the driving mechanism, and the outer roll surface of the cold pressing forming rolls is provided with a wall for extruding the wrapping layer so that the outer periphery of the wrapping layer forms a reinforcing structure. Forming the depression 10, the cross-sectional shape of the forming depression 10 is a trapezoid with a large outside and a small inside, and the distance between the outer roll surfaces between the two cold forming rolls is smaller than the thickness of the cladding layer upstream of the reinforcing structure forming device. When the wrapped basalt fiber bundle passes between two cold forming rollers, it is first squeezed by the outer roll surface between the two cold forming rollers, and the diameter of the wrapping layer becomes smaller. The purpose of this process is to make the wrapped The combination between the layer and the basalt fiber bundles is tighter, because the pressure between the wrapping layer and the basalt fiber bundles is not particularly large during the lagging process of the lagging device, and the glue is automatically wrapped on the basalt fiber bundles. In addition, setting the forming depression can also reduce the restriction on the thickness of the wrapping layer, so that the distance between the two cold forming rolls can be reduced. The forming protrusions with a concave structure formed on the outer periphery occupy a certain thickness because the forming protrusions occupy a certain thickness, and the thickness of the wrapping layer itself is limited, so the distance between the two cold forming rollers cannot be reduced.

At the same time, the two cold forming rollers squeeze the wrapping layer, which also makes the redundant wrapping layer enter the forming depression of the cold pressing forming roller, and is extruded by the cold pressing forming roller, so that trapezoidal shapes are formed on the wrapping layer. The raised structure is trapezoidal, which is conducive to the smooth demoulding of the cold forming roller and the wrapping layer. After being extruded by the cold forming roller, the temperature of the wrapping layer is lowered to finalize the final shape. After passing through the fiber bundle cutting device, it is cut into sections of basalt fiber labels 15. The section cutting device 11 includes a pair of relatively rotating roller knives 12, The roller cutter 12 rotates relatively to cut the basalt fiber bundle. The final basalt fiber sign is shown in Figure 2, with a diameter of 1 to 3 mm and a length of 2 to 4 cm. Each basalt fiber sign 15 includes a fiber bundle 1 and a wrapping layer 14 wrapped around the outer periphery of the limiting bundle. A reinforcement structure 13 with two raised structures at both ends.

The state of the basalt fiber stick mixed in the concrete is shown in Figure 3. The ratio of the basalt fiber bundles is 6% to 10%. After the concrete 16 is solidified, there is a strong connection between the reinforced structure 13 and the concrete 16, ensuring The tensile capacity of the basalt fiber stick can fully act on the concrete, thereby greatly improving the tensile capacity and crack resistance of the concrete. When applied to asphalt concrete, the melting temperature of asphalt is 140~150°C. Mix basalt fiber into the asphalt and stir evenly. The temperature of the asphalt is not enough to melt the coating layer. After the asphalt solidifies, it can be better with basalt fiber. connected together. In other embodiments of the present invention, the reinforcing structure on the wrapping layer can also be a concave structure, and at this time, the forming depression on the cold forming roller will be replaced by a forming protrusion; when the reinforcing structure forming device is closer to the rubber covering device, Without causing the wrap layer to lose more temperature, the conveying roller of the conveying device may not be equipped with a heating device at this time, and of course the conveying roller may not be provided. At this time, the reinforced structure forming device is used to convey the basalt fiber bundle.

Examples of basalt fiber sticks for concrete are shown in Figures 1 to 3. The specific structure of the basalt fiber sticks is the same as that of the basalt limiter sticks described in the above-mentioned embodiments of each preparation device, and will not be described in detail here.

Claims (8)

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.