CN111691057A

CN111691057A - Production method of vertical strand tension obliquely-woven insulating pipe

Info

Publication number: CN111691057A
Application number: CN202010482570.4A
Authority: CN
Inventors: 蒋文君
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2020-09-22

Abstract

The invention provides a production method of a vertical strand stretch-draw obliquely-woven insulating pipe, which comprises the steps of firstly preparing an inner layer structure of the insulating pipe by immersing and curing fiber yarns through a stretch-draw strand mechanism; then the inner layer structure is continuously drawn downwards, the fiber yarns on the outer mold tensioning frame penetrate through a circular weaving machine, and the surface of the inner mold is woven into cylindrical fiber cloth in an inclined mode; finally, the woven and formed tubular fabric is continuously immersed and solidified to form the outer layer structure of the tubular product. In the pultrusion process, the basalt fiber yarns are woven at 45 degrees, the integrated continuous production is realized, the hardness, specific strength, compression resistance and overall performance of the product are improved, and the problem of poor compression strength of the cable pipeline and the petrochemical pipeline is thoroughly solved.

Description

Production method of vertical strand tension obliquely-woven insulating pipe

Technical Field

The invention relates to the field of insulating pipes, in particular to a production method of a vertical stranded tensioning inclined weaving insulating pipe, which is suitable for products such as composite insulators, composite cross arms, composite components and the like.

Background

With the development of social productivity, the application range of pipeline engineering is more and more extensive, and especially after various high-efficiency high-pressure multifunctional hydraulic machines (various water pumps, slurry pumps, compressors, blowers, exhaust fans and the like) appear, the pipeline engineering technology is developed rapidly. A large number of pipeline facilities are built in modern industrial, public and civil buildings, and are used for not only conveying water, gas and other liquids, but also underground cable power transmission, long-distance pipeline conveying of petroleum and natural gas, long-distance pipeline conveying of solid materials such as coal, concentrate, tailings, silt, ash and the like with water as a carrier, pneumatic pipeline lifting of seabed mineral resources with water as a carrier, loading and unloading of granular materials such as grains and the like with air as a carrier and pneumatic pipeline conveying, and process flows of some factories even replace other conveying machines with pipeline conveying facilities, so that the process flow is greatly simplified, and investment, energy consumption and operation cost are reduced.

In urban underground cable transmission, a cable pipeline is mainly installed in a section where a communication cable and a power line intersect, so that the situation that the power line is broken to cause a short-circuit accident, the communication cable and a steel wire rope are electrified is prevented, the cable is protected, and a certain isolation effect is also realized on the magnetic field interference of the power line.

The pipeline conveying mode is a new bulk material conveying mode which is developed after railway transportation, road transportation, waterway transportation and air transportation, and becomes one of important components of national economic transportation systems. Due to the advantages of pipeline transportation, the application field of the pipeline transportation is continuously expanded, almost all factories, mines, public buildings and civil buildings are not provided with various pipeline facilities, for example, metallurgical factories, mines, power plants, coal preparation plants and petrochemical plants are not provided with various criss-cross pipelines, water supply, heat supply, gas supply and drainage pipelines of high-rise buildings are indispensable, along with the development of urban and rural construction, the improvement of the living standard of people and the improvement of the building standard, the investment and the engineering quantity of pipeline engineering are also continuously improved, and the occupied proportion in basic construction is larger and larger. The long-distance pipeline transportation of petroleum, natural gas, solid materials and the like is greatly developed in China, even thousands of kilometers of transnational pipelines of petroleum and natural gas appear, and a plurality of long-distance pipeline transportation projects can be predicted to be continuously operated and constructed in the 21 st century.

The novel basalt fiber composite material is an ideal material for replacing the traditional material to prepare cable pipelines and high-voltage urban pipe networks.

The existing basalt pipe is usually wrapped by adopting a multi-layer felt-yarn-felt structure and then is immersed in a resin material. However, the structural strength of the composite material is still inferior to that of the existing metal pipe, and under the condition that the material technology cannot break through in a short period, the improvement of the strength of the pipe through structural improvement is a scheme which is easier to realize.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a production method of a vertical strand stretch-draw obliquely-woven insulating pipe, basalt fiber yarns are woven at an angle of 45 degrees in the pultrusion process, the integrated continuous production is realized, the hardness, the specific strength, the compression resistance and the overall performance of a product are improved, and the difficult problem of poor compression strength of a cable pipeline and a petrochemical pipeline is thoroughly solved.

The invention provides a production method of a vertical strand tensioning inclined braided insulation pipe, which comprises the following steps:

1. a plurality of fiber yarns on the tensioning frame pass through the limiting yarn threading plate and then pass through the yarn threading holes in the stranded gear;

2. the motor provides power for the motor transmission gear to drive the motor transmission gear to rotate, and the motor transmission gear transmits power through the chain to drive all the yarn strand gears to rotate;

3. the yarns passing through each of the stranded gears are stranded into a strand of stranded rib under the rotation of the stranded gears, a plurality of strands of stranded ribs passing through the plurality of stranded gears pass through the inner and outer die forming mechanisms and are fixed on the surface of the inner layer structure, and a spiral reinforcing rib is formed after immersion and solidification;

4. the inner layer structure with the spiral reinforcing ribs continues to face downwards, fiber yarns on the outer die tensioning frame penetrate through the circular weaving machine, and cylindrical fiber cloth is woven on the surface of the inner die in an inclined mode at an angle of 45 degrees;

5. the woven and formed tubular fabric is continuously immersed and solidified to form an outer layer structure of the tubular product.

The production device adopted by the invention is as follows: include from last stretch-draw frame, collection yarn mechanism, interior outer mould forming mechanism, the heavy pond of soaking and solidification equipment that sets gradually extremely down, collection yarn mechanism include chain mechanism, motor drive gear and a plurality of gynostemma pentaphylla gear, wherein, every gynostemma pentaphylla gear central authorities all opened a plurality of holes of wearing, motor drive gear passes through the chain belt and drives a gynostemma pentaphylla gear rotation, and the yarn in the stretch-draw frame passes the hole of wearing in the gynostemma pentaphylla gear, gets into to sink and soaks in the pond. And a limiting yarn threading plate is arranged between the tensioning frame and the yarn collecting mechanism.

The chain mechanism is an annular chain, and a motor transmission gear is arranged in the annular chain.

The chain can also be a rectangular structure formed by four chains, and a motor transmission gear is arranged in each chain.

The circular weaving machine comprises annular fixing strips and annular weaving cloth die inlets, wherein the annular fixing strips are distributed from top to bottom around the tubular product, the inner diameter of each annular fixing strip is larger than that of each annular weaving cloth die inlet, a plurality of tensioning fixing plates are fixed on the annular fixing strips, a plurality of tensioning wheels are fixed on each tensioning fixing plate, and fiber yarns enter the annular weaving cloth die inlets in an inclined mode through the tensioning wheels.

The invention has the beneficial effects that:

1. the novel composite material is tensioned by adopting vertical steering prestress, so that the tensile strength and the longitudinal rigidity are improved.

2. The composite material is a hollow structure, is torsion-proof, has no deformation, and is light and high in strength. The longitudinal rigidity of the new material with the same volume is similar to that of 45# steel, the tensile strength is 6 times of that of the new material, and the weight is 1/3 times of that of the new material.

3. The surface of the new composite material is subjected to high-temperature glaze spraying (or injection molding of ASA), and the composite material is sun-proof, ageing-resistant, corrosion-resistant, high-temperature resistant, and has a service life of 50 years.

4. The technology of prefabricating the reinforcing ribs comprises the following steps: pre-infiltrating a plurality of strands of basalt fiber yarn resin glue solution, then performing stranding to form a spiral winding structure, and curing to prepare a reinforcing rib; and adding basalt fiber yarns, felts, glue solution and the like again, and allowing the mixture to enter a mold for secondary curing, so that the strength of the support rib in the hollow structure is improved, and the strength of the product is improved.

5. 45-degree weaving fiber technology: the basalt fiber yarns are woven at an angle of 45 degrees in the pultrusion process, integrated continuous production is realized, the hardness, specific strength, compression resistance and overall performance of products are improved, and the problem of poor compression strength of cable pipelines and petrochemical pipelines is thoroughly solved.

6. The cable conduit, high-pressure city pipe network and the like are light in weight, high in strength, excellent in specific strength and compression resistance, ageing-resistant, corrosion-resistant, high and low temperature-resistant, can be used for a long time, and guarantee the operation safety of the cable.

7. The static investment can save the cost by 40 percent.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a schematic view of the yarn collecting mechanism of the present invention.

Fig. 3 is a schematic view of a circular chain mechanism.

Fig. 4 is a schematic view of a rectangular chain mechanism.

FIG. 5 is a schematic view of an overmold mechanism.

Fig. 6 is a schematic view of a circular loom.

Detailed Description

The invention will be further explained with reference to the drawings.

The whole structure of the invention is shown in figure 1, and comprises a stretching frame 1, a yarn collecting mechanism 2, an internal mold forming mechanism 3, a first immersion tank 4, a first curing device 5, an external mold forming mechanism 12, a second immersion tank 13 and a second curing device 14 which are arranged from top to bottom in sequence. The yarn collecting mechanism is shown in figures 2, 3 and 4 and comprises a chain mechanism 6, a motor transmission gear 7 and a plurality of strand gears 8, wherein the center of each strand gear 8 is provided with a plurality of yarn penetrating holes 11, the motor transmission gear drives each strand gear to rotate through a chain belt, and yarns 9 in a tensioning frame penetrate through the yarn penetrating holes in the strand gears and enter a submerging pool.

As shown in fig. 3, the chain mechanism is an annular chain, and a motor transmission gear is arranged in the annular chain.

As shown in fig. 4, the chains are rectangular structures formed by four chains, and each chain is internally provided with a motor transmission gear.

Further improved, a limiting yarn threading plate 10 is arranged between the tensioning frame and the yarn collecting mechanism.

The transmission gear and the stranded gear are fixed on the same horizontal plane, can only rotate and cannot move.

As shown in fig. 5, the external molding device comprises a circular weaving machine and an external mold stretching frame distributed around the circular weaving machine, fibers on the external mold stretching frame are obliquely woven on the surface of an internal mold through the back of the circular weaving machine, and the weaving angle is optimally 45 degrees.

As shown in fig. 6, the circular weaving machine includes an annular fixing strip 15 and an annular woven fabric inlet 16, the annular fixing strip 15 is vertically distributed around a tube 20, the inner diameter of the annular fixing strip is larger than that of the annular woven fabric inlet, a plurality of tensioning fixing plates 17 are fixed on the annular fixing strip 15, a plurality of tensioning wheels 18 are fixed on each tensioning fixing plate 17, and a fiber yarn 19 obliquely enters the annular woven fabric inlet through the tensioning wheels.

The working method of the invention is as follows:

While the invention has been described in terms of its preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims

1. A production method of a vertical strand tensioning inclined weaving insulating pipe is characterized by comprising the following steps: the method comprises the following steps:

1) preparing an inner layer structure of the insulating pipe by immersing and curing fiber yarns through a tensioning and stranding mechanism;

2) continuously drawing the inner layer structure downwards, enabling the fiber yarns on the outer mold tensioning frame to penetrate through a circular weaving machine, and weaving the fiber yarns on the surface of the inner mold into cylindrical fiber cloth in an inclined mode;

3) the woven and formed tubular fabric is continuously immersed and solidified to form an outer layer structure of the tubular product.

2. The method for producing a vertically stranded tensioned diagonally braided insulated pipe material according to claim 1, wherein: the inclined weaving in the step 2) has a weaving angle of 45 degrees.