CN113097943A - Cable protection pipe with multilayer structure and production method thereof - Google Patents

Cable protection pipe with multilayer structure and production method thereof Download PDF

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Publication number
CN113097943A
CN113097943A CN202110312565.3A CN202110312565A CN113097943A CN 113097943 A CN113097943 A CN 113097943A CN 202110312565 A CN202110312565 A CN 202110312565A CN 113097943 A CN113097943 A CN 113097943A
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CN
China
Prior art keywords
cable protection
knitting
tube
production method
modified polyurethane
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CN202110312565.3A
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Chinese (zh)
Inventor
丁仕勇
何成林
曾朋
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Laian Youpeng Transportation Equipment Co ltd
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Laian Youpeng Transportation Equipment Co ltd
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Priority to CN202110312565.3A priority Critical patent/CN113097943A/en
Publication of CN113097943A publication Critical patent/CN113097943A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • H02G3/0462—Tubings, i.e. having a closed section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
    • B32B13/14—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • H02G3/0462—Tubings, i.e. having a closed section
    • H02G3/0481—Tubings, i.e. having a closed section with a circular cross-section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/06—Vegetal fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2597/00—Tubular articles, e.g. hoses, pipes

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)

Abstract

The invention relates to the field of cable protection pipes, in particular to a cable protection pipe with a multilayer structure and a production method thereof. The high-density polyethylene outer sleeve, the knitted reinforcing layer and the modified polyurethane inner tube are combined together to form an integral structure, so that the tube body has better applicability, safety and durability.

Description

Cable protection pipe with multilayer structure and production method thereof
Technical Field
The invention relates to the field of cable protection pipes, in particular to a cable protection pipe with a multilayer structure and a production method thereof.
Background
The cable protection pipe is named as a cable pipe, a power cable pipe, a cement cable pipe, a power calandria, a power cable protection pipe and the like, and is mainly installed in a section where a communication cable and a power line are crossed, so that the power line is prevented from being broken to cause a short circuit accident, the communication cable and a steel wire rope are electrified, the cable, a switch and a machine core board are protected, the whole machine is not burnt out, and a certain isolation effect is realized on the magnetic field interference of the power line; for the development of times, composite materials made of cement or other non-metals are gradually replaced by glass fiber reinforced plastics, most of cable protection pipes made of glass fiber reinforced plastics can improve the underground corrosion resistance and prolong the service life of the cable protection pipes, have smooth surfaces, have outstanding performance in the aspect of cleaning and the like.
Chinese patent No. CN112405660A discloses a processing and forming method of communication cable plastic protection tubes, which relates to the technical field of communication cable plastic protection tube processing, and comprises a bottom plate, a conveying mechanism, a cutting mechanism and a clamping mechanism, wherein the bottom plate is fixedly provided with the cutting mechanism, the upper side of the cutting mechanism is fixedly connected with the clamping mechanism, the left side of the cutting mechanism is provided with the conveying mechanism, and the conveying mechanism and the cutting mechanism are arranged in a straight line.
At present, in the production of foam jacketed heat-insulating pipes and cladding pipes, manufacturers for producing foam pipes in China mainly heat polyethylene for extrusion molding and cladding on steel pipes or foam layers, thereby forming uniform, compact and continuous heat-insulating layers. In the production method, the inner pipe is a steel pipe, and the steel pipe needs to be fixed on a forming table; and (3) injecting a polyurethane foaming agent into the middle gap of the outer PE pipe.
In the prior art, a cable protection pipe is easy to rust, has short service life and lacks of a continuous production method using a plastic pipe as a protection pipe. Therefore, it is highly desirable to develop a cable protection tube having a multi-layer structure and a method for producing the same.
Disclosure of Invention
The invention aims to provide a cable protection pipe with a multilayer structure and a production method thereof, and aims to solve the problems that the cable protection pipe is easy to rust, has short service life and is lack of a continuous production method using a plastic pipe as a protection pipe in the background technology.
The technical scheme of the invention is as follows: the cable protection tube with the multilayer structure comprises a tube body, wherein the tube body comprises a high-density polyethylene outer sleeve, a knitted reinforcing layer and a modified polyurethane inner tube, the knitted reinforcing layer is pressed on the outer side wall of the modified polyurethane inner tube, the high-density polyethylene outer sleeve is pressed on the outer side wall of the knitted reinforcing layer, and the knitted reinforcing layer is located between the high-density polyethylene outer sleeve and the modified polyurethane inner tube.
Furthermore, the knitting enhancement layer comprises high-elastic modulus fiber, high-grade cement is pressed on the outer side wall of the high-elastic modulus fiber, high-friction vinylon is pressed on the outer side wall of the high-grade cement, and plant fiber is pressed on the outer side wall of the high-friction vinylon.
A production method of a cable protection pipe with a multilayer structure comprises the following steps:
s1, extruding a modified polyurethane inner tube by a pin cold feed extruder;
s2, laying a knitting enhancement layer on the outer side wall of the modified polyurethane inner tube by using a high-speed horizontal knitting machine;
s3, extruding the outer sleeve by a pin cold feed extruder;
s4, carrying out traction conveying on the pipe body by using a tractor;
s5, cooling the pipe body by a cooler;
s6, coating a separant on the pipe body by using a spraying machine;
s7, drying the pipe body coated with the separant;
and S8, finally, cutting the pipe body into fixed length by using a cutting machine according to the requirement.
Further, when the modified polyurethane inner tube is extruded in the step S1, the diameter of the screw of the inner rubber extruder is 90mm, the length-diameter ratio is 12:1, and the rotation speed of the inner rubber extruder is 100-1500 r/min.
Further, when the reinforcing layer is laid by knitting in the step S2, the number of knitting in the high-speed horizontal knitting machine is 12,18,24, and the rotating speed of the high-speed horizontal knitting machine is 450r/min to 1500 r/min.
Further, when the tube body is conveyed by traction conveying in the step S4, the belt width of the traction machine is 95mm, the clamping length is 600mm, and the traction speed is 0-30 r/min.
Further, when the cooling in step S5 is performed, the length of the cooling machine is 6m, the flow rate of the cooling water in the cooling machine is 4-5t/h, the cooling capacity of the heat exchanger in the cooling machine is 75000-83600J/h, and the cooling time is 5-10 min.
Further, in step S6, the isolation agent is one or more of fatty acid soap, fatty acid, paraffin, glycerin, vaseline, silicone oil, polyethylene glycol, and low molecular weight polyethylene.
Further, the time period for drying the tube in the step S7 with the dryer is 1-3 min.
Further, when the cutting is performed in the fixed length in the step S8, the cutting rate of the cutting machine is 80 to 100 times/min, and the cutting precision is ± 1 mm.
The invention provides a cable protection pipe with a multilayer structure and a production method thereof through improvement, compared with the prior art, the cable protection pipe has the following improvement and advantages:
(1) the high-density polyethylene outer sleeve, the knitted reinforcing layer and the modified polyurethane inner tube are combined together to form an integral structure, so that the tube body has better applicability, safety and durability.
(2) The knitted reinforcing layer adopted by the invention is formed by high elastic modulus fiber, high-grade cement, high-friction vinylon and plant fiber, so that the tube body has better toughness while the overall strength of the tube body is improved, and the service life is effectively prolonged.
(3) The invention adopts the cored method production process to process the high-density polyethylene outer sleeve, the knitting enhancement layer and the modified polyurethane inner tube, ensures the stability of the geometric dimensions of the high-density polyethylene outer sleeve, the knitting enhancement layer and the modified polyurethane inner tube, and simultaneously improves the adhesiveness of the high-density polyethylene outer sleeve, the knitting enhancement layer and the modified polyurethane inner tube, thereby greatly improving the production efficiency.
Drawings
The invention is further explained below with reference to the figures and examples:
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a view of the structure of the tube of the present invention;
FIG. 3 is a cross-sectional view of the tube of the present invention;
figure 4 is a view of the structure of the knitted reinforcing layer of the present invention.
Description of reference numerals:
the composite pipe comprises a pipe body 1, a high-density polyethylene outer sleeve 2, a knitted reinforcing layer 3, a modified polyurethane inner pipe 4, high elastic modulus fibers 5, high-grade cement 6, high-molar vinylon 7 and plant fibers 8.
Detailed Description
The present invention will be described in detail below with reference to the attached drawings, and the technical solutions in the embodiments of the present invention will be clearly and completely described. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The utility model provides a multilayer structure's cable protection pipe, includes body 1, and body 1 includes high density polyethylene outer tube 2, knitting enhancement layer 3 and modified polyurethane inner tube 4, and the suppression of knitting enhancement layer 3 is on the lateral wall of modified polyurethane inner tube 4, and the suppression of high density polyethylene outer tube 2 is on the lateral wall of knitting enhancement layer 3, and knitting enhancement layer 3 is located between high density polyethylene outer tube 2 and the modified polyurethane inner tube 4.
Further, the knitting enhancement layer 3 comprises high-elastic modulus fibers 5, high-grade cement 6 is pressed on the outer side walls of the high-elastic modulus fibers 5, high-mole vinylon 7 is pressed on the outer side walls of the high-grade cement 6, and plant fibers 8 are pressed on the outer side walls of the high-mole vinylon 7.
A production method of a cable protection pipe with a multilayer structure comprises the following steps:
s1, extruding a modified polyurethane inner tube by a pin cold feed extruder;
s2, laying a knitting enhancement layer on the outer side wall of the modified polyurethane inner tube by using a high-speed horizontal knitting machine;
s3, extruding the outer sleeve by a pin cold feed extruder;
s4, carrying out traction conveying on the pipe body by using a tractor;
s5, cooling the pipe body by a cooler;
s6, coating a separant on the pipe body by using a spraying machine;
s7, drying the pipe body coated with the separant;
and S8, finally, cutting the pipe body into fixed length by using a cutting machine according to the requirement.
Further, when the modified polyurethane inner tube is extruded in the step S1, the diameter of the screw of the inner rubber extruder is 90mm, the length-diameter ratio is 12:1, and the rotating speed of the inner rubber extruder is 100 r/min.
Further, when the knitting reinforcement layer is laid in step S2, the number of knitting by the high-speed horizontal knitting machine is 12, and the rotation speed of the high-speed horizontal knitting machine is 450 r/min.
Further, when the tube body is conveyed by the traction conveyance in step S4, the belt width of the traction machine is 95mm, the clamping length is 600mm, and the traction speed is 10 r/min.
Further, when the temperature is reduced in step S5, the length of the cooling machine is 6m, the flow rate of cooling water in the cooling machine is 4t/h, the cooling capacity of the heat exchanger in the cooling machine is 75000J/h, and the cooling time is 5 min.
Further, the partitioning agent is a fatty acid soap in step S6.
Further, the time period for drying the tube in the dryer in step S7 is 1 min.
Further, when the cut-off is performed at a fixed length in step S8, the cutting rate of the cutter is 80 times/min, and the cutting accuracy is. + -. 1 mm.
Example two
The utility model provides a multilayer structure's cable protection pipe, includes body 1, and body 1 includes high density polyethylene outer tube 2, knitting enhancement layer 3 and modified polyurethane inner tube 4, and the suppression of knitting enhancement layer 3 is on the lateral wall of modified polyurethane inner tube 4, and the suppression of high density polyethylene outer tube 2 is on the lateral wall of knitting enhancement layer 3, and knitting enhancement layer 3 is located between high density polyethylene outer tube 2 and the modified polyurethane inner tube 4.
Further, the knitting enhancement layer 3 comprises high-elastic modulus fibers 5, high-grade cement 6 is pressed on the outer side walls of the high-elastic modulus fibers 5, high-mole vinylon 7 is pressed on the outer side walls of the high-grade cement 6, and plant fibers 8 are pressed on the outer side walls of the high-mole vinylon 7.
A production method of a cable protection pipe with a multilayer structure comprises the following steps:
s1, extruding a modified polyurethane inner tube by a pin cold feed extruder;
s2, laying a knitting enhancement layer on the outer side wall of the modified polyurethane inner tube by using a high-speed horizontal knitting machine;
s3, extruding the outer sleeve by a pin cold feed extruder;
s4, carrying out traction conveying on the pipe body by using a tractor;
s5, cooling the pipe body by a cooler;
s6, coating a separant on the pipe body by using a spraying machine;
s7, drying the pipe body coated with the separant;
and S8, finally, cutting the pipe body into fixed length by using a cutting machine according to the requirement.
Further, when the modified polyurethane inner tube is extruded in the step S1, the diameter of the screw of the inner rubber extruder is 90mm, the length-diameter ratio is 12:1, and the rotating speed of the inner rubber extruder is 1000 r/min.
Further, when the reinforcing layer is laid by knitting in step S2, the number of knitting by the high-speed horizontal knitting machine is 18, and the rotation speed of the high-speed horizontal knitting machine is 1200 r/min.
Further, when the tube body is conveyed by the traction conveyance in step S4, the belt width of the traction machine is 95mm, the clamping length is 600mm, and the traction speed is 20 r/min.
Further, when the temperature is reduced in step S5, the length of the cooling machine is 6m, the flow rate of cooling water in the cooling machine is 4.5t/h, the cooling capacity of the heat exchanger in the cooling machine is 80000J/h, and the cooling time is 8 min.
Further, in step S6, the isolating agent is silicone oil and polyethylene glycol.
Further, the time period for drying the tube in the dryer in step S7 is 2 min.
Further, when the cut-off is performed at a fixed length in step S8, the cutting rate of the cutter is 90 times/min, and the cutting accuracy is. + -. 1 mm.
EXAMPLE III
The utility model provides a multilayer structure's cable protection pipe, includes body 1, and body 1 includes high density polyethylene outer tube 2, knitting enhancement layer 3 and modified polyurethane inner tube 4, and the suppression of knitting enhancement layer 3 is on the lateral wall of modified polyurethane inner tube 4, and the suppression of high density polyethylene outer tube 2 is on the lateral wall of knitting enhancement layer 3, and knitting enhancement layer 3 is located between high density polyethylene outer tube 2 and the modified polyurethane inner tube 4.
Further, the knitting enhancement layer 3 comprises high-elastic modulus fibers 5, high-grade cement 6 is pressed on the outer side walls of the high-elastic modulus fibers 5, high-mole vinylon 7 is pressed on the outer side walls of the high-grade cement 6, and plant fibers 8 are pressed on the outer side walls of the high-mole vinylon 7.
A production method of a cable protection pipe with a multilayer structure comprises the following steps:
s1, extruding a modified polyurethane inner tube by a pin cold feed extruder;
s2, laying a knitting enhancement layer on the outer side wall of the modified polyurethane inner tube by using a high-speed horizontal knitting machine;
s3, extruding the outer sleeve by a pin cold feed extruder;
s4, carrying out traction conveying on the pipe body by using a tractor;
s5, cooling the pipe body by a cooler;
s6, coating a separant on the pipe body by using a spraying machine;
s7, drying the pipe body coated with the separant;
and S8, finally, cutting the pipe body into fixed length by using a cutting machine according to the requirement.
Further, when the modified polyurethane inner tube is extruded in the step S1, the diameter of the screw of the inner rubber extruder is 90mm, the length-diameter ratio is 12:1, and the rotating speed of the inner rubber extruder is 1500 r/min.
Further, when the reinforcing layer is laid by knitting in step S2, the number of knitting by the high-speed horizontal knitting machine is 24, and the rotation speed of the high-speed horizontal knitting machine is 1500 r/min.
Further, when the tube body is conveyed by the traction conveyance in step S4, the belt width of the traction machine is 95mm, the clamping length is 600mm, and the traction speed is 30 r/min.
Further, when the temperature is reduced in step S5, the length of the cooling machine is 6m, the flow rate of cooling water in the cooling machine is 5t/h, the cooling capacity of a heat exchanger in the cooling machine is 83600J/h, and the cooling time is 5-10 min.
Further, the partitioning agent is paraffin in step S6.
Further, the time period for drying the tube in the dryer in step S7 is 3 min.
Further, when the cut-off is performed at a fixed length in step S8, the cutting rate of the cutter is 100 times/min, and the cutting accuracy is. + -. 1 mm.
The working principle is as follows: extruding the modified polyurethane inner tube by using a pin cold feed extruder, wherein when the modified polyurethane inner tube is extruded, the diameter of a screw of an inner rubber extruder is 90mm, the length-diameter ratio is 12:1, and the rotating speed of the inner rubber extruder is 1000 r/min; then laying a knitting enhancement layer on the outer side wall of the modified polyurethane inner tube by using a high-speed horizontal knitting machine, wherein the knitting number of the high-speed horizontal knitting machine is 12,18 and 24, and the rotating speed of the high-speed horizontal knitting machine is 1200 r/min; extruding the outer sleeve by a pin cold feed extruder; the pipe body is dragged and conveyed by a tractor, when the pipe body is conveyed by the traction and conveyance, the belt width of the tractor is 95mm, the clamping length is 600mm, and the traction speed is 20 r/min; the cooler cools the pipe body, the length of the cooler is 6m, the flow of cooling water in the cooler is 4.5t/h, the cooling capacity of a heat exchanger in the cooler is 80000J/h, and the cooling time is 8 min; coating silicone oil and polyethylene glycol on the pipe body by using a spraying machine; and drying the pipe body coated with the release agent for 2min, and finally cutting the pipe body into fixed length according to the requirement by using a cutting machine, wherein the cutting speed of the cutting machine is 90 times/min, and the cutting precision is +/-1 mm.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A cable protection tube of a multilayer structure, characterized in that: the improved polyurethane tube comprises a tube body (1), wherein the tube body (1) comprises a high-density polyethylene outer sleeve (2), a knitting enhancement layer (3) and a modified polyurethane inner tube (4), the knitting enhancement layer (3) is pressed on the outer side wall of the modified polyurethane inner tube (4), the high-density polyethylene outer sleeve (2) is pressed on the outer side wall of the knitting enhancement layer (3), and the knitting enhancement layer (3) is positioned between the high-density polyethylene outer sleeve (2) and the modified polyurethane inner tube (4).
2. A cable protection tube of a multi-layered structure as claimed in claim 1, wherein: knitting enhancement layer (3) are including high elastic modulus fibre (5), the suppression has high mark cement (6) on the lateral wall of high elastic modulus fibre (5), and the suppression has high vinylon (7) of rubbing on the lateral wall of high mark cement (6), the suppression has plant fiber (8) on the lateral wall of high vinylon (7) of rubbing.
3. A production method of a cable protection pipe with a multilayer structure is characterized by comprising the following steps: the method comprises the following steps:
s1, extruding a modified polyurethane inner tube by a pin cold feed extruder;
s2, laying a knitting enhancement layer on the outer side wall of the modified polyurethane inner tube by using a high-speed horizontal knitting machine;
s3, extruding the outer sleeve by a pin cold feed extruder;
s4, carrying out traction conveying on the pipe body by using a tractor;
s5, cooling the pipe body by a cooler;
s6, coating a separant on the pipe body by using a spraying machine;
s7, drying the pipe body coated with the separant;
and S8, finally, cutting the pipe body into fixed length by using a cutting machine according to the requirement.
4. A production method of a cable protection tube of a multi-layered structure as set forth in claim 3, wherein: when the modified polyurethane inner tube is extruded in the step S1, the diameter of the screw of the inner rubber extruder is 90mm, the length-diameter ratio is 12:1, and the rotating speed of the inner rubber extruder is 100-1500 r/min.
5. A production method of a cable protection tube of a multi-layered structure as set forth in claim 3, wherein: when the knitting reinforcing layer is laid in the step S2, the knitting number of the high-speed horizontal knitting machine is 12,18 and 24, and the rotating speed of the high-speed horizontal knitting machine is 450r/min-1500 r/min.
6. A production method of a cable protection tube of a multi-layered structure as set forth in claim 3, wherein: and in the step S4, when the pipe body is conveyed by traction conveying, the belt width of the tractor is 95mm, the clamping length is 600mm, and the traction speed is 0-30 r/min.
7. A production method of a cable protection tube of a multi-layered structure as set forth in claim 3, wherein: when the step S5 is performed for cooling, the length of the cooler is 6m, the flow rate of the cooling water in the cooler is 4-5t/h, the cooling capacity of the heat exchanger in the cooler is 75000-83600J/h, and the cooling time is 5-10 min.
8. A production method of a cable protection tube of a multi-layered structure as set forth in claim 3, wherein: the separating agent in the step S6 is one or more of fatty acid soap, fatty acid, paraffin, glycerin, vaseline, silicone oil, polyethylene glycol, and low molecular weight polyethylene.
9. A production method of a cable protection tube of a multi-layered structure as set forth in claim 3, wherein: and the drying time of the pipe body in the step S7 by the dryer is 1-3 min.
10. A production method of a cable protection tube of a multi-layered structure as set forth in claim 3, wherein: when the step S8 is cut to length, the cutting speed of the cutting machine is 80-100 times/min, and the cutting precision is +/-1 mm.
CN202110312565.3A 2021-03-24 2021-03-24 Cable protection pipe with multilayer structure and production method thereof Pending CN113097943A (en)

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Application Number Priority Date Filing Date Title
CN202110312565.3A CN113097943A (en) 2021-03-24 2021-03-24 Cable protection pipe with multilayer structure and production method thereof

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Application Number Priority Date Filing Date Title
CN202110312565.3A CN113097943A (en) 2021-03-24 2021-03-24 Cable protection pipe with multilayer structure and production method thereof

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CN113097943A true CN113097943A (en) 2021-07-09

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CN111211536A (en) * 2020-02-27 2020-05-29 山东呈祥电气有限公司 High-strength plastic-steel composite cable pipeline, production equipment and production process
CN111262210A (en) * 2020-02-27 2020-06-09 山东呈祥电气有限公司 Three-layer extruded high-strength plastic cable pipe, production equipment and production process
CN210898402U (en) * 2019-12-28 2020-06-30 孝感市三力管业有限公司 Novel Viron cement cable pipe
CN111601995A (en) * 2018-01-16 2020-08-28 宇部兴产株式会社 Laminated tube
CN212004617U (en) * 2020-05-06 2020-11-24 温州三杰科技有限公司 High-density polyethylene winding reinforced pipe
CN112233843A (en) * 2020-12-17 2021-01-15 特变电工(德阳)电缆股份有限公司 Environment-friendly flame-retardant cold-resistant wear-resistant cable and manufacturing method and application thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB855366A (en) * 1957-11-28 1960-11-30 Moulded Products Australasia L Method for the manufacture of reinforced plastic tubing and tubing produced thereby
GB1148575A (en) * 1965-04-13 1969-04-16 Elastomer Ag A machine for the manufacture of rings or disks
CN2048054U (en) * 1989-03-27 1989-11-22 大连市中山区双平物资包装材料厂 Nonwoven cloth packing bag
DE19820498A1 (en) * 1998-05-07 1999-11-11 Saueressig Gmbh & Co Process for manufacturing a sleeve, in particular for the printing industry
DE20201644U1 (en) * 2002-02-04 2002-06-20 Ffa Automotive Ag Altenrhein protective sheathing
CN2742256Y (en) * 2004-08-27 2005-11-23 天津市德亿达投资集团有限公司 Composite heat insulation directly buried pipeline
ITMI20050318A1 (en) * 2005-03-02 2006-09-03 Danilo Sanson FLEXIBLE SHEATH FOR THE PROTECTION OF ELECTRIC CABLES
CN102916382A (en) * 2012-07-19 2013-02-06 泰州元升电子有限公司 Cable conduit
CN103346519A (en) * 2013-07-23 2013-10-09 上海远洲管业有限公司 Abrasion-resistant anti-impact multi-hole cable protective pipe and preparing method thereof
CN103527862A (en) * 2013-09-27 2014-01-22 漯河君叁材料高科有限公司 Glass fiber reinforced polyethylene composite material pipe and manufacturing method thereof
CN104751957A (en) * 2013-12-31 2015-07-01 深圳市联嘉祥科技股份有限公司 Photovoltaic cable and preparation method thereof
CN105398142A (en) * 2015-12-08 2016-03-16 山东省呈祥电工电气有限公司 High strength plastic steel pipe and manufacturing method thereof
CN108000996A (en) * 2017-12-20 2018-05-08 五行科技股份有限公司 A kind of non-penetrating fado layer continuous hose and preparation method thereof
CN111601995A (en) * 2018-01-16 2020-08-28 宇部兴产株式会社 Laminated tube
CN109546606A (en) * 2018-11-24 2019-03-29 红旗集团电力金具有限公司 A kind of cold-contraction type cable termination
CN109624435A (en) * 2018-12-13 2019-04-16 南京钢铁股份有限公司 A kind of petroleum gas delivering pipe line stainless steel clad plate and preparation method thereof
CN109929173A (en) * 2019-04-02 2019-06-25 广东胜达塑胶科技有限公司 A kind of PE tubing of high intensity and preparation method thereof
CN210898402U (en) * 2019-12-28 2020-06-30 孝感市三力管业有限公司 Novel Viron cement cable pipe
CN111211536A (en) * 2020-02-27 2020-05-29 山东呈祥电气有限公司 High-strength plastic-steel composite cable pipeline, production equipment and production process
CN111262210A (en) * 2020-02-27 2020-06-09 山东呈祥电气有限公司 Three-layer extruded high-strength plastic cable pipe, production equipment and production process
CN212004617U (en) * 2020-05-06 2020-11-24 温州三杰科技有限公司 High-density polyethylene winding reinforced pipe
CN112233843A (en) * 2020-12-17 2021-01-15 特变电工(德阳)电缆股份有限公司 Environment-friendly flame-retardant cold-resistant wear-resistant cable and manufacturing method and application thereof

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Application publication date: 20210709