Vertical twisted strand tensioned oblique braided insulation pipe production line

Abstract

The present invention provides a vertical stranding tensioning oblique braided insulating pipe production line, comprising a tensioning frame, a yarn collecting mechanism, an inner mold forming mechanism, a first immersion tank, a first curing device, an outer mold forming mechanism, a second immersion tank and a second curing device arranged in sequence from top to bottom, characterized in that: the outer mold forming device comprises a circular loom and an outer mold tensioning frame distributed around the circular loom, and the fibers on the outer mold tensioning frame are woven obliquely on the inner mold surface after passing through the circular loom. The present invention twists the fiber yarn into a plurality of reinforcing rib strands through a special yarn collecting mechanism, and arranges them between the inner and outer molds to form a pipe with spiral reinforcing ribs inside after curing, thereby improving the overall strength of the pipe.

Description

Technical Field

[0001] The invention relates to the field of insulating pipes, in particular to a vertical twisted strand tensioned oblique braided insulating pipe production line, which is suitable for products such as composite insulators, composite cross arms, and composite components. Background Art

[0002] With the development of social productivity, the application scope of pipeline engineering is becoming more and more extensive, especially after the emergence of various high-efficiency, high-pressure and multifunctional hydraulic machinery (various water pumps, slurry pumps, compressors, blowers, exhaust fans, etc.), pipeline engineering technology has achieved rapid development. A large number of pipeline facilities are built in modern industrial, public and civil buildings, not only for water, gas and other liquids, but also for underground cable power transmission, long-distance pipeline transportation of oil and natural gas, long-distance pipeline transportation of solid materials such as coal, concentrate, tailings, silt, ash and slag with water as the carrier, pneumatic pipeline lifting of submarine mineral resources with water as the carrier, loading and unloading of grain and other granular materials and pneumatic pipeline transportation with air as the carrier. The process flow of some factories even uses pipeline transportation facilities instead of other transportation machinery, which greatly simplifies the process flow and reduces investment, energy consumption and operating costs.

[0003] In urban underground cable power transmission, cable ducts are mainly installed in areas where communication cables and power lines intersect to prevent power lines from breaking and causing short circuits, which would cause communication cables and steel ropes to be electrified. This protects the cables and also plays a certain role in isolating the magnetic field interference of the power lines.

[0004] Pipeline transportation is a new way of transporting bulk materials after railway transportation, road transportation, water transportation and air transportation, and has become an important part of the national economic transportation system. Due to the many advantages of pipeline transportation, its application field is constantly expanding. Almost all factories, mines, public buildings and civil buildings are equipped with various pipeline facilities. For example, metallurgical plants, mines, power plants, coal preparation plants, and petrochemical plants are all built with crisscrossing pipelines. Water supply, heating, gas supply and drainage pipelines for high-rise buildings are indispensable. With the development of urban and rural construction, the improvement of people's living standards and the improvement of building standards, the investment and engineering volume of pipeline projects are also increasing, and the proportion of pipeline projects in capital construction is increasing. Long-distance pipeline transportation of oil, natural gas, solid materials, etc. has also achieved great development in my country, and even thousands of kilometers of cross-border pipelines for oil and natural gas have appeared. It can be predicted that many long-distance pipeline transportation projects will continue to be started in the 21st century.

[0005] The new basalt fiber composite material is an ideal material to replace traditional materials for preparing cable pipes, high-voltage urban pipes, and oil transportation pipeline networks.

[0006] Existing basalt pipes are usually wrapped with a multi-layer felt-yarn-felt structure and then immersed in resin materials. However, compared with existing metal pipes, the structural strength of composite materials is still at a disadvantage. In the absence of a breakthrough in material technology in the short term, improving the strength of the pipe through structural improvement is a relatively easy solution. Summary of the invention

[0007] In order to solve the problems of the prior art, the present invention provides a vertical twisted and tensioned oblique braided insulating pipe production line, in which fiber yarn is twisted into a plurality of reinforcing rib strands through a special yarn gathering mechanism, which are arranged between inner and outer molds and solidified to form a pipe with spiral reinforcing ribs inside, thereby improving the overall strength of the pipe.

[0008] The present invention provides a vertical strand-tensioned oblique braided insulating pipe production line, comprising a tensioning frame, a yarn collecting mechanism, an inner mold forming mechanism, a first immersion tank, a first curing device, an outer mold forming mechanism, a second immersion tank and a second curing device, which are arranged in sequence from top to bottom.

[0009] The yarn gathering mechanism includes a chain mechanism, a motor transmission gear and a plurality of strand gears, wherein each strand gear has a plurality of yarn threading holes in the center. The motor transmission gear drives the strand gears to rotate through the chain belt, and the yarn in the tensioning frame passes through the yarn threading holes in the strand gears and enters the immersion pool.

[0010] The outer mold forming device comprises a circular loom and an outer mold tensioning frame distributed around the circular loom. The fibers on the outer mold tensioning frame pass through the circular loom and are then tilted and woven onto the surface of the inner mold.

[0011] The circular loom includes an annular fixing strip distributed up and down around the tube and an annular woven cloth inlet die opening. The inner diameter of the annular fixing strip is larger than the annular woven cloth inlet die opening. A plurality of tensioning fixing plates are fixed on the annular fixing strip. A plurality of tensioning wheels are fixed on each tensioning fixing plate. After passing through the tensioning wheel, the fiber yarn tilts into the annular woven cloth inlet die opening.

[0012] As a further improvement, the chain mechanism is an annular chain, and a motor transmission gear is arranged inside the annular chain.

[0013] As a further improvement, the chain is a rectangular structure composed of four chains, and a motor transmission gear is arranged in each chain.

[0014] As a further improvement, a limited position yarn threading plate is arranged between the tensioning frame and the yarn collecting mechanism.

[0015] Further improvement, the transmission gear and the strand gear are fixed on the same horizontal plane and can only rotate but cannot move.

[0016] As a further improvement, the fibers on the outer mold tensioning frame are woven onto the inner mold surface at an angle of 45 degrees after passing through a circular loom.

[0017] The working method of the present invention is as follows:

[0018] 1. Multiple fiber yarns on the tensioning frame pass through the limited yarn feeding plate and then through the yarn feeding hole in the strand gear;

[0019] 2. The motor provides power to the motor transmission gear, driving the motor transmission gear to rotate. The motor transmission gear transmits power through the chain, driving the rotation of all the yarn strand gears;

[0020] 3. The yarn passing through each strand gear is twisted into a strand of strand ribs under the rotation of the strand gears. Several strands of strand ribs passing through several strand gears pass through the inner mold forming mechanism and are fixed on the surface of the inner layer structure. After immersion and curing, spiral reinforcement ribs are formed;

[0021] 4. The inner structure with spiral reinforcement ribs continues downward, and the fiber yarn on the outer mold tensioning frame passes through the circular loom and is woven into a cylindrical fiber cloth at a 45° angle on the inner mold surface. The woven cylindrical cloth continues to be immersed and solidified to become the outer structure of the pipe.

[0022] The beneficial effects of the present invention are:

[0023] 1. The new composite material adopts vertical prestressing to improve the tensile strength and longitudinal stiffness.

[0024] 2. The composite new material has a hollow structure, is twist-proof, non-deformable, lightweight and high-strength. The longitudinal stiffness of the new material of the same volume is similar to that of 45# steel, its tensile strength is 6 times that of 45# steel, and its weight is 1 / 3 of that of 45# steel.

[0025] 3. The surface of the composite new material is sprayed with high temperature glaze (or injected with ASA), which is sun-proof, aging-resistant, corrosion-resistant, and resistant to high and low temperatures, and its service life can reach 50 years.

[0026] 4. Prefabricated reinforcement technology: multiple strands of basalt fiber yarn are pre-impregnated with resin glue and then twisted to form a spiral winding structure, which is cured to form reinforcement; basalt fiber yarn, felt, glue, etc. are added into the mold again for secondary curing to improve the strength of the supporting ribs in the hollow structure and improve the strength of the product.

[0027] 5. 45° braided fiber technology: During the pultrusion process, the basalt fiber yarn is braided at 45°, and integrated and continuous production is carried out to improve the hardness, specific strength, compression resistance and overall performance of the product, and completely solve the problem of poor compressive strength of cable pipes and petrochemical pipes.

[0028] 6. Cable pipelines, high-voltage urban pipelines, etc. are lightweight and high-strength, with excellent specific strength and compressive resistance, aging resistance, corrosion resistance, high and low temperature resistance, and can be used for a long time to ensure the safety of cable operation.

[0029] 7. Static investment can save 40% of costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0031] Figure 2 It is a schematic diagram of the yarn gathering mechanism of the present invention.

[0032] Figure 3 Schematic diagram of a circular chain mechanism.

[0033] Figure 4 Schematic diagram of a rectangular chain mechanism.

[0034] Figure 5 Schematic diagram of the outer mold forming mechanism.

[0035] Figure 6 Schematic diagram of a circular loom. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the accompanying drawings.

[0037] The overall structure of the present invention is as follows Figure 1 As shown, it includes a tensioning frame 1, a yarn collecting mechanism 2, an inner mold forming mechanism 3, a first immersion tank 4, a first curing device 5, an outer mold forming mechanism 12, a second immersion tank 13 and a second curing device 14 arranged in sequence from top to bottom. The yarn collecting mechanism is as shown in FIG. Figure 2 , 3 As shown in 4, it includes a chain mechanism 6, a motor transmission gear 7 and a plurality of strand gears 8, wherein each strand gear 8 has a plurality of yarn threading holes 11 in the center, and the motor transmission gear drives the strand gears to rotate through the chain belt, and the yarn 9 in the tensioning frame passes through the yarn threading holes in the strand gears and enters the immersion pool.

[0038] like Figure 3 As shown, the chain mechanism is an annular chain, and a motor transmission gear is arranged inside the annular chain.

[0039] like Figure 4 As shown, the chain is a rectangular structure composed of four chains, and a motor transmission gear is arranged in each chain.

[0040] As a further improvement, a limited position yarn threading plate 10 is provided between the tensioning frame and the yarn collecting mechanism.

[0041] A further improvement is that the transmission gear and the strand gear are fixed on the same horizontal plane and can only rotate but cannot move.

[0042] like Figure 5As shown, the external mold forming device includes a circular loom and an external mold tensioning frame distributed around the circular loom. The fibers on the external mold tensioning frame pass through the circular loom and are woven obliquely onto the surface of the inner mold, and the optimal weaving angle is 45°.

[0043] like Figure 6 As shown, the circular loom includes an annular fixing strip 15 distributed up and down around the tube 20 and an annular woven cloth entry die 16. The inner diameter of the annular fixing strip is larger than the annular woven cloth entry die. 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. The fiber yarn 19 passes through the tensioning wheel and then tilts into the annular woven cloth entry die.

[0044] The working method of the present invention is as follows:

[0045] 1. Multiple fiber yarns on the tensioning frame pass through the limited yarn feeding plate and then through the yarn feeding hole in the strand gear;

[0046] 2. The motor provides power to the motor transmission gear, driving the motor transmission gear to rotate. The motor transmission gear transmits power through the chain, driving the rotation of all the yarn strand gears;

[0047] 3. The yarn passing through each strand gear is twisted into a strand of strand ribs under the rotation of the strand gears. Several strands of strand ribs passing through several strand gears pass through the inner mold forming mechanism and are fixed on the surface of the inner layer structure. After immersion and curing, spiral reinforcement ribs are formed;

[0048] 4. The inner structure with spiral reinforcement ribs continues downward, and the fiber yarn on the outer mold tensioning frame passes through the circular loom and is woven into a cylindrical fiber cloth at a 45° angle on the inner mold surface. The woven cylindrical cloth continues to be immersed and solidified to become the outer structure of the pipe.

[0049] The present invention has many specific application paths. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the present invention. These improvements should also be regarded as the protection scope of the present invention.

Claims

1. A vertical stranding and tensioning oblique braided insulating pipe production line, comprising a tensioning frame, a yarn collecting mechanism, an inner mold forming mechanism, a first immersion tank, a first curing device, an outer mold forming mechanism, a second immersion tank and a second curing device arranged in sequence from top to bottom, characterized in that: The external mold forming mechanism includes a circular loom and an external mold tensioning frame distributed around the circular loom. The circular loom includes an annular fixing strip distributed up and down around the tube and an annular woven cloth inlet. The inner diameter of the annular fixing strip is larger than the annular woven cloth inlet. A plurality of tensioning fixing plates are fixed on the annular fixing strip. A plurality of tensioning wheels are fixed on each tensioning fixing plate. The fiber yarn passes through the tensioning wheel and then tilts into the annular woven cloth inlet. The yarn collecting mechanism includes a chain mechanism, a motor transmission gear and a plurality of strand gears, wherein a plurality of yarn threading holes are opened in the center of each strand gear. The motor transmission gear drives each strand gear to rotate through a chain belt. The fiber yarn in the tensioning frame passes through the yarn threading holes in the strand gear and enters the immersion pool. The fiber yarn passing through each strand gear is twisted into a strand of tendons under the rotation of the strand gear, and the strands of tendons passing through the strand gears pass through the inner mold forming mechanism and are fixed on the surface of the inner structure. After immersion and curing, spiral reinforcement ribs are formed; the inner structure with spiral reinforcement ribs continues to move downward, and the fiber yarn on the outer mold tensioning frame passes through the circular loom and is woven into a cylindrical fiber cloth at a 45° angle on the inner mold surface. The woven cylindrical cloth continues to be immersed and cured to become the outer structure of the pipe; the chain mechanism is an annular chain, and a motor transmission gear is arranged in the annular chain, or the chain mechanism is a rectangular structure composed of four chains, and a motor transmission gear is arranged in each chain.

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