CN113669516A - Multilayer reinforced dredging pipe with floating layer and forming process thereof - Google Patents
Multilayer reinforced dredging pipe with floating layer and forming process thereof Download PDFInfo
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- CN113669516A CN113669516A CN202110953172.0A CN202110953172A CN113669516A CN 113669516 A CN113669516 A CN 113669516A CN 202110953172 A CN202110953172 A CN 202110953172A CN 113669516 A CN113669516 A CN 113669516A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
- F16L9/147—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
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- Rigid Pipes And Flexible Pipes (AREA)
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Abstract
The invention relates to the technical field of dredging engineering pipelines, in particular to a multilayer reinforced dredging pipe with a floating layer and a forming process thereof. The forming step comprises pipe body mould preparation, functional layer laying, vulcanization forming and demoulding. The invention has the advantages that: 1) the rubber high polymer material is combined with the wound steel wire reinforcement layer; 2) the functional layers of various different mechanical structures are firmly connected into a whole, the binding force is strong, and the problem that the pipe body is continuously subjected to fatigue damage under the severe environment is solved. 3) The floating and sinking device can adapt to different operation environments and different floating and sinking heights under the same operation environment.
Description
Technical Field
The invention relates to the technical field of dredging engineering pipelines, in particular to a multilayer reinforced dredging pipe with a floating layer and a forming process thereof.
Background
The dredging pipe processed and molded by utilizing the high polymer material has higher wear resistance, corrosion resistance and low flow resistance, can effectively reduce the influence caused by large conveying pressure and high flow velocity in the dredging process, and can simultaneously reduce the damage caused by a large amount of gravels, coral reefs, coarse sand, hard clay and the like contained in the dredging soil. The dredging pipe processed and molded by utilizing the high polymer material has higher wear resistance, corrosion resistance and low flow resistance, can effectively reduce the influence caused by large conveying pressure and high flow velocity in the dredging process, and can simultaneously reduce the damage caused by a large amount of gravels, coral reefs, coarse sand, hard clay and the like contained in the dredging soil. However, most dredging pipes are water operation pipelines, and the buoyancy of the floating layer plays a decisive role in meeting different operation environments and different floating and sinking heights in the same operation environment.
The Chinese utility model with application number 201720637169.7 discloses a self-floating low-resistance wear-resistant dredging rubber pipe, wherein a rubber pipeline is of a multilayer composite structure and comprises a thermal spraying ceramic layer, a high-pressure-resistant steel wire winding rubber pipe and a floating body material layer from inside to outside, and flanges with bolt holes are arranged on two sides of the rubber pipeline; the high pressure resistant steel wire wound rubber pipe is of a double-layer structure, the inner layer and the outer layer are both wear-resistant rubber layers, and a steel wire cord fabric layer is clamped between the inner layer and the outer layer.
The chinese patent with application number 201710986418.8 discloses a dredging pipe and a processing method thereof, the processing method of the dredging pipe comprises the following steps: s100, welding a steel wire mesh on the inner wall of the metal base pipe; s200, centrifugally spraying adhesive glue on the steel wire mesh, wherein the adhesive glue of the adhesive glue is completely contained and compounded on the steel wire mesh to form a steel wire mesh adhesive layer; s300, centrifugally spraying a high-molecular wear-resistant layer on the steel mesh glue layer; s400, curing the sprayed high-molecular wear-resistant layer at normal temperature to enable the high-molecular wear-resistant layer and the steel mesh glue layer to be cured on the metal base pipe together. The technical scheme has the defects that the steel wire of the pipe body can be peeled off under the long-term stretching, bending and twisting actions, and the macromolecule wear-resistant layer and the metal base pipe in the dredging pipe are easy to separate, so that the dredging pipe is failed and scrapped.
Disclosure of Invention
The invention aims to provide a multilayer reinforced dredging pipe with a floating layer and a forming process thereof, which overcome the defects of the prior art, adopt the combination of a rubber high polymer material and a steel wire reinforcing layer of a winding structure in order to adapt to different operating environments and different floating heights in the same operating environment, fill trapezoidal rubber in steel wire gaps to play a role in fixing steel wires, firmly connect functional layers of various different mechanical structures into a whole through a pipe body, improve the integral anti-deformation capability, avoid the stripping phenomenon of the steel wires under the long-term stretching, bending and twisting actions of the pipe body, and prolong the service life of the pipe body.
In order to solve the problems, the invention adopts the following technical scheme:
the technical scheme is as follows: a multilayer reinforced dredging pipe with a floating layer comprises a pipe body and flanges arranged at two ends of the pipe body, and is characterized in that the pipe body sequentially comprises a wear-resistant macromolecule layer, a warning macromolecule layer, a first composite reinforced layer, a steel wire filling layer, a second composite reinforced layer, a first macromolecule filling layer, a foaming material layer, a second macromolecule filling layer, a third composite reinforced layer and an externally-coated macromolecule layer from inside to outside, wherein the thickness of the wear-resistant macromolecule layer is 30-70 mm, the thickness of the warning macromolecule layer is 3-15 mm, the thickness of the first composite reinforced layer is 15-40 mm, the thickness of the steel wire reinforced layer is 3-7 mm, the thickness of the steel wire filling layer is 5-10 mm, the thickness of the second composite reinforced layer is 10-20 mm, the thickness of the first macromolecule filling layer is 2-4 mm, the thickness of the foaming material layer is 200-500 mm, the thickness of the second macromolecule filling layer is 1-5 mm, the thickness of the third composite reinforced layer is 2-5 mm, the thickness of the external application polymer layer is 2-7 mm, the inner diameter of the pipe body is 500-1000 mm, and the length of the pipe body is 10000-13000 mm.
At least one of the first composite reinforced layer, the second composite reinforced layer and the third composite reinforced layer is formed by winding a reinforced film which is made by mixing any one or a combination of several materials of cord fabric, nylon screen cloth, silk thread, nylon rope or polyester fiber with any one or a combination of several materials of nitrile rubber, styrene butadiene rubber or natural rubber, the thickness of each layer of reinforced film is 1-2.5 mm, the winding angle is 30-70 degrees, and adjacent layers are wound in a cross mode.
The winding angle of the foaming material layer is 30-70 degrees, the foaming adhesive is sprayed between every two adjacent layers and reversely wound, 4-18 layers are wound, and the end part of the foaming material layer is wound in the circumferential direction.
The warning polymer layer is composed of wear-resistant polymer layers of at least two colors, and the thickness of each layer is 3-15 mm.
Any one of a steel wire, a steel wire or a steel rope is wound in the steel wire reinforcing layer to serve as a reinforcing body, the diameter of the reinforcing body is 1-9 mm, and the winding distance is 1-7 mm.
The second technical proposal is that: the forming process of the multilayer reinforced dredging pipe with the floating layer is characterized by comprising pipe body mold preparation, functional layer laying, vulcanization forming and demolding, and specifically comprises the following steps:
1) preparing a pipe body mould, and treating, positioning and matching the flange cylinder, wherein the pipe body mould preparation comprises winding a PP film on the mould, and coating, brushing, painting or smearing demoulding silicone oil; the treatment process of the flange cylinder comprises sand blasting, coating, brushing, painting or glue smearing of the flange cylinder, and rubber is wound or adhered at the end part of the flange cylinder;
2) laying all functional layers, sequentially filling or winding a wear-resistant polymer layer and a warning polymer layer on a pipe body mould between two flange cylinders, and pressurizing and shaping by using a pressurizing material in a winding or binding mode; winding or binding a first composite reinforced layer on the outer surfaces of the pipe body mould and the flange cylinder, and pressurizing and shaping; winding or binding a steel wire reinforcing layer on the pipe body from one end to the other end, and laying a steel wire filling layer on the outer surface of the steel wire reinforcing layer; winding or binding a second composite reinforced layer on the outer surface of the steel wire filling layer, and pressurizing and shaping; winding a first polymer filling layer on the surface of the second composite reinforcing layer, and pressurizing and shaping; winding a foaming material layer on the surface of the first polymer filling layer, and pressurizing and shaping; winding a second polymer filling layer outside the foaming material layer, and pressurizing and shaping; winding a third composite reinforced layer on the surface of the polymer filling layer, and pressurizing and shaping; filling or winding the whole tube with a polymer layer, and pressurizing and shaping;
3) vulcanizing, namely treating the whole pipe by using a continuous vulcanization method until the pipe is molded, wherein the vulcanization temperature is 90-150 ℃, and the vulcanization time is 600-1500 min;
4) and (4) demolding, namely taking the pipe body off the pipe body mold, and reusing the pipe body mold.
Before the polymer layer is laid and applied externally in the step 2), the steel wire at the end part of the flange, the second composite reinforcing layer, the foaming material layer and the third composite reinforcing layer are required to be subjected to shape modification treatment, and the insufficient filling or the redundant parts are removed, so that the perimeter size deviation of the steel wire meets the design requirement.
The pressure setting in the step 2) is to wind or bind any one of cord fabric, nylon cloth, nylon threads or nylon ropes, the winding tension is 5-50 MPa, the pressure setting time is 5-60min, and then the product is dismantled.
The wear-resistant polymer layer in the step 2) is made of any one of nitrile rubber, styrene butadiene rubber, natural rubber, ethylene propylene diene monomer or chloroprene rubber.
Compared with the prior art, the invention has the beneficial effects that: 1) the rubber polymer material is combined with the wound steel wire reinforcement layer, and trapezoidal rubber is filled in the steel wire gaps, so that the steel wire is fixed on one hand, and the damage of the steel wire to the steel wire body after the steel wire body deforms can be avoided on the other hand; 2) the pipe body is firmly connected into a whole by the functional layers of various different mechanical structures, and the binding force is strong, so that the integral deformation resistance of the pipe body is improved, the stripping phenomenon of steel wires under the long-term stretching, bending and twisting actions of the pipe body can be effectively avoided, the influence of fatigue damage is reduced, and the service life of the pipe body is prolonged. 3) The floating layer can be used for water operation pipelines, different operation environments and different floating and sinking heights in the same operation environment, and the buoyancy of the floating layer can be configured as required.
Drawings
FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention, in which the dimension in the length direction is determined according to practical situations;
FIG. 2 is a schematic view of a layer structure of a pipe body according to embodiment 1 of the present invention;
FIG. 3 is a schematic view of the installation of a pipe body mold and a flange cylinder before molding in example 1 of the present invention;
FIG. 4 is a flow chart of a molding process in example 1 of the present invention.
In the figure: 1-wear-resistant polymer layer, 2-warning polymer layer, 3-first composite reinforcing layer, 4-steel wire reinforcing layer, 5-steel wire filling layer, 6-second composite reinforcing layer, 7-first polymer filling layer, 8-foaming material layer, 9-second polymer filling layer, 10-third composite reinforcing layer, 11-external application polymer layer, 12-pipe body, 13-flange, 14-pipe body mould, 15-flange cylinder and 16-flange hoop.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
In the description of the application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Example 1
Referring to fig. 1-2, which is a schematic structural view of an embodiment 1 of the multi-layer reinforced dredging pipe with a floating layer of the present invention, the multi-layer reinforced dredging pipe with a floating layer of the present invention comprises a pipe body 12 and flanges 13 disposed at two ends of the pipe body, the pipe body 12 comprises, from inside to outside, a wear-resistant polymer layer 1, a warning polymer layer 2, a first composite reinforcing layer 3, a steel wire reinforcing layer 4, a steel wire filling layer 5, a second composite reinforcing layer 6, a first polymer filling layer 7, a foaming material layer 8, a second polymer filling layer 9, a third composite reinforcing layer 10, and an externally applied polymer layer 11, wherein the thickness of the wear-resistant polymer layer 1 is 30-70 mm, the thickness of the warning polymer layer 2 is 3-15 mm, the thickness of the first composite reinforcing layer 3 is 15-40 mm, the thickness of the steel wire reinforcing layer 4 is 3-7 mm, the thickness of the steel wire filling layer 5 is 5-10 mm, the thickness of the second composite reinforcing layer 6 is 10-20 mm, the thickness of the first polymer filling layer 7 is 2-4 mm, the thickness of the foaming material layer 8 is 200-500 mm, the thickness of the second polymer filling layer 9 is 1-5 mm, the thickness of the third composite strengthening layer 10 is 2-5 mm, and the thickness of the externally-applied polymer layer 11 is 2-7 mm.
In example 1, taking a tube body with an inner diameter of 800mm and a length of 11700mm as an example, the first composite reinforcing layer 3, the second composite reinforcing layer 6 and the third composite reinforcing layer 10 are formed by winding reinforcing rubber sheets mixed by mesh cloth and a nitrile rubber layer, the thickness of each reinforcing rubber sheet is 1.5mm, adjacent layers are wound in a cross mode, and the winding angle is 50 degrees. The wear-resistant polymer layer 1 is a butadiene-acrylonitrile rubber layer. The warning polymer layer 2 is composed of nitrile rubber layers of at least two colors, and each layer is 5mm thick. The steel wire is wound in the steel wire reinforcing layer.
Referring to fig. 3-4, the forming process of the multilayer reinforced dredging pipe with the floating layer comprises pipe body mold preparation, functional layer laying, vulcanization forming and demolding, and specifically comprises the following steps:
1) preparing a pipe body mould, and treating, positioning and matching the flange cylinder, wherein the treatment process of the pipe body mould 14 comprises sand blasting, coating, brushing, painting or glue smearing liquid and high polymer material edge covering. Carrying out sand blasting treatment on the outer surface and the inner surface edges of the flange cylinder 15 to enable the grade of the flange cylinder to reach Sa2 grade; coating glue solution on the surface of the flange cylinder after sand blasting; and after the pipe body is air-dried, wrapping and winding the nitrile rubber, and then sleeving two flange cylinders at two ends of the pipe body mould, wherein the distance between the outer edges of the flanges at the two ends is 11700 mm.
2) Laying all functional layers, winding a wear-resistant polymer layer 1 of wear-resistant nitrile rubber of the pipe body between the paired flanges for multiple times, wherein the total thickness of the wound wear-resistant nitrile rubber is 40 mm; then winding a warning polymer layer 2 of warning nitrile rubber (winding yellow and red nitrile rubbers respectively) with the thickness of 10 mm; then winding a clean cloth strip with certain strength to pressurize and shape the pipe body at the pressure of 20MPa, measuring the circumference of the pipe body to be 2851mm after winding the pressurized cloth strip, and removing the cloth strip after winding for 10 min; winding nitrile rubber on the outer surface of the flange and two sides of the flange hoop, then winding clean cloth strips with certain strength to pressurize and shape the pipe body at the pressure of 20MPa, and removing the cloth strips after winding for 10 min; winding a first composite reinforced rubber layer which is formed by mixing screen cloth and nitrile rubber on the outer surfaces of the pipe body and the flange, wherein the thickness of the first composite reinforced rubber layer is 1.5mm, the winding angle is 50 degrees, the total thickness after winding is 15mm, winding a clean cloth strip with certain strength to pressurize and shape the pipe body, and removing the cloth strip after winding for 10 min; steel wires with the diameter of 4mm are wound on the outer pipeline body of the strengthening layer from one end flange barrel to the other end flange barrel, the winding distance is 5mm, and trapezoidal rubber is filled in gaps of the steel wires to form a 6mm steel wire filling layer; winding a second composite reinforced rubber layer which is formed by mixing screen cloth and nitrile rubber on the outer surfaces of the pipe body and the flange, wherein the thickness of the reinforced rubber layer is 1.5mm, the winding angle is 50 degrees, the total thickness after winding is 15mm, winding a clean cloth strip with certain strength to pressurize and shape the pipe body, and removing the cloth strip after winding for 10 min; the first polymer filling layer is a butadiene-acrylonitrile rubber layer with the thickness of 2 mm; the foaming material layer is formed by winding foaming materials with the thickness of 20mm outside the pipe body, winding 10 layers at a winding angle of 50 degrees, spraying glue solution between every two layers for fixation, winding the layers in opposite directions, winding a foaming plate with the thickness of 20mm at the end part of the pipeline in the circumferential direction, enabling the maximum diameter position to be consistent with the main body of the pipeline, spraying the glue solution between every two layers for fixation, and pressurizing and shaping at the pressure of 20 MPa; the second polymer filling layer is a butadiene-acrylonitrile rubber layer with the thickness of 3 mm; the thickness of the third composite reinforced layer is 5mm, the thickness of the reinforced rubber sheet is 1.5mm, the winding angle is 50 degrees, and the reinforced rubber sheet is pressed and shaped after winding; welding a steel wire of the flange to the flange cylinder, flanging, cutting, shaping and fixing the reinforcing layer, and continuously filling rubber at the rubber-lacking part; the method comprises the steps of winding a chloroprene rubber externally-applied high polymer layer with the thickness of 2mm outside the whole pipe, winding a clean cloth strip with certain strength to pressurize and shape the pipe body at the pressure of 20MPa, measuring the circumferences of three positions of the pipe body after shaping, wherein the circumference of the shaped pipe body is 3850-4000 mm.
3) And (3) vulcanizing, namely, continuously vulcanizing the whole pipe until the pipe is molded, and finally vulcanizing the whole pipe at the vulcanizing temperature of 110 ℃ for 680 min. The bonding strength between the polymer material in the steel wire reinforced layer and the steel wire after vulcanization is not lower than 3N/mm. The perimeter of the periphery of the pipeline is 3800-3950 mm.
4) And (4) demolding, namely taking the pipe body off the pipe body mold, and reusing the pipe body mold.
Examples 2 to 4
The multi-layer reinforced dredging pipe with a floating layer in examples 2-4 was formed in the same manner as in example 1, wherein the dimensional parameters of the functional layers are shown in table 1 below, and the parameters of the forming process are shown in table 2 below.
TABLE 1
TABLE 2
According to the embodiment of the invention, the structural form of combining the rubber polymer material and the wound steel wire reinforcement layer is adopted, and the trapezoidal rubber is filled in the steel wire gaps, so that the steel wire is fixed on one hand, the damage of the steel wire to the pipe body after the pipe body is deformed can be avoided on the other hand, and the problem that the pipe body of the dredging pipe is continuously subjected to fatigue damage in a severe environment is solved. Meanwhile, the functional layers of various different mechanical structures are firmly connected into a whole, the binding force is obviously enhanced, so that the integral deformation resistance of the pipe body is improved, and the service life of the pipe body is prolonged to 3 years from 6 months. The floating layer structure can meet the requirements of pipes for water operation in various different operation environments, different floating and sinking heights can be realized by adjusting the thickness of the floating layer in the same operation environment, and the application effect is good.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and its inventive concept within the technical scope of the present invention.
Claims (9)
1. A multilayer reinforced dredging pipe with a floating layer comprises a pipe body and flanges arranged at two ends of the pipe body, and is characterized in that the pipe body sequentially comprises a wear-resistant macromolecule layer, a warning macromolecule layer, a first composite reinforced layer, a steel wire filling layer, a second composite reinforced layer, a first macromolecule filling layer, a foaming material layer, a second macromolecule filling layer, a third composite reinforced layer and an externally-coated macromolecule layer from inside to outside, wherein the thickness of the wear-resistant macromolecule layer is 30-70 mm, the thickness of the warning macromolecule layer is 3-15 mm, the thickness of the first composite reinforced layer is 15-40 mm, the thickness of the steel wire reinforced layer is 3-7 mm, the thickness of the steel wire filling layer is 5-10 mm, the thickness of the second composite reinforced layer is 10-20 mm, the thickness of the first macromolecule filling layer is 2-4 mm, the thickness of the foaming material layer is 200-500 mm, the thickness of the second macromolecule filling layer is 1-5 mm, the thickness of the third composite reinforced layer is 2-5 mm, the thickness of the external application polymer layer is 2-7 mm, the inner diameter of the pipe body is 500-1000 mm, and the length of the pipe body is 10000-13000 mm.
2. The multi-layer reinforced dredging pipe with the floating layer as claimed in claim 1, wherein at least one of the first composite reinforcing layer, the second composite reinforcing layer and the third composite reinforcing layer is formed by winding a reinforced rubber sheet mixed by any one or a combination of several materials of cord fabric, nylon mesh fabric, silk yarn, nylon thread, nylon rope or polyester fiber and any one of nitrile rubber, styrene butadiene rubber or natural rubber, the thickness of each reinforced rubber sheet is 1-2.5 mm, the winding angle is 30-70 degrees, and adjacent layers are wound in a cross way.
3. The multi-layer reinforced dredging pipe with the floating layer as claimed in claim 1, wherein the winding angle of the foaming material layer is 30-70 °, the adjacent two layers are sprayed with the foam adhesive and wound in opposite directions, 4-18 layers are wound, and the end part is wound in the circumferential direction.
4. The multi-layer reinforced dredging pipe with a floating layer as claimed in claim 1, wherein the warning polymer layer is composed of at least two wear-resistant polymer layers.
5. The multi-layer reinforced dredging pipe with the floating layer as claimed in claim 1, wherein any one of steel wires, steel wires or steel ropes is wound in the steel wire reinforcing layer as a reinforcement, the diameter of the reinforcement is 1-9 mm, and the winding pitch is 1-7 mm.
6. The forming process of the multilayer reinforced dredging pipe with the floating layer is characterized by comprising pipe body mold preparation, functional layer laying, vulcanization forming and demolding, and specifically comprises the following steps:
1) preparing a pipe body mould, and treating, positioning and matching the flange cylinder, wherein the pipe body mould preparation comprises winding a PP film on the mould, and coating, brushing, painting or smearing demoulding silicone oil; the treatment process of the flange cylinder comprises sand blasting, coating, brushing, painting or glue smearing of the flange cylinder, and rubber is wound or adhered at the end part of the flange cylinder;
2) laying all functional layers, sequentially filling or winding a wear-resistant polymer layer and a warning polymer layer on a pipe body mould between two flange cylinders, and pressurizing and shaping by using a pressurizing material in a winding or binding mode; winding or binding a first composite reinforced layer on the outer surfaces of the pipe body mould and the flange cylinder, and pressurizing and shaping; winding or binding a steel wire reinforcing layer on the pipe body from one end to the other end, and laying a steel wire filling layer on the outer surface of the steel wire reinforcing layer; winding or binding a second composite reinforced layer on the outer surface of the steel wire filling layer, and pressurizing and shaping; winding a first polymer filling layer on the surface of the second composite reinforcing layer, and pressurizing and shaping; winding a foaming material layer on the surface of the first polymer filling layer, and pressurizing and shaping; winding a second polymer filling layer outside the foaming material layer, and pressurizing and shaping; winding a third composite reinforced layer on the surface of the second polymer filling layer, and pressurizing and shaping; filling or winding the whole tube with a polymer layer, and pressurizing and shaping;
3) vulcanizing, namely treating the whole pipe by using a continuous vulcanization method until the pipe is molded, wherein the vulcanization temperature is 90-150 ℃, and the vulcanization time is 600-1500 min;
4) and (4) demolding, namely taking the pipe body off the pipe body mold, and reusing the pipe body mold.
7. The forming process of the multi-layer reinforced dredging pipe with the floating layer as claimed in claim 6, wherein before the polymer layer is coated on the outer surface in the step 2), the steel wire at the end of the flange, the second composite reinforcing layer, the foaming material layer and the third composite reinforcing layer are subjected to shape modification treatment to fill insufficient or remove redundant parts, so that the deviation of the perimeter dimension meets the design requirement.
8. The forming process of the multi-layer reinforced dredging pipe with the floating layer as claimed in claim 6, wherein the press-setting in the step 2) is performed by winding or binding with any one of cord fabric, nylon cloth, nylon thread or nylon rope, the winding tension is 5-50 MPa, the press-setting time is 5-60min, and then the pipe is dismantled.
9. The process for forming the multi-layer reinforced dredging pipe with the floating layer as claimed in claim 6, wherein the wear-resistant polymer layer in the step 2) is made of any one of nitrile rubber, styrene butadiene rubber, natural rubber, ethylene propylene diene monomer or chloroprene rubber.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116717725A (en) * | 2023-05-29 | 2023-09-08 | 广东工业大学 | Sea surface oil pipeline |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1556948A (en) * | 1976-09-25 | 1979-12-05 | Sumitomo Rubber Ind | Dredging sleeve hose |
| CN101387360A (en) * | 2008-10-07 | 2009-03-18 | 宁波大洋实业发展有限公司 | Large caliber rubber positive and negative flexible pipe of shield machine |
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| CN202660100U (en) * | 2012-05-22 | 2013-01-09 | 江苏华神特种橡胶制品股份有限公司 | Outer coating layer enhanced type floating and dredging rubber hose |
| CN212203439U (en) * | 2020-04-24 | 2020-12-22 | 辽源市长江胶管有限公司 | Floating type built-in armor rubber pipe |
| CN112984230A (en) * | 2019-12-02 | 2021-06-18 | 湖南诚路管业科技有限公司 | Plastic pipe convenient to replace and with abrasion prompt function |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1556948A (en) * | 1976-09-25 | 1979-12-05 | Sumitomo Rubber Ind | Dredging sleeve hose |
| CN101387360A (en) * | 2008-10-07 | 2009-03-18 | 宁波大洋实业发展有限公司 | Large caliber rubber positive and negative flexible pipe of shield machine |
| CN202392309U (en) * | 2011-12-14 | 2012-08-22 | 中橡集团沈阳橡胶研究设计院 | Special rubber corrugated pipe for ship diesel engine |
| CN202660100U (en) * | 2012-05-22 | 2013-01-09 | 江苏华神特种橡胶制品股份有限公司 | Outer coating layer enhanced type floating and dredging rubber hose |
| CN112984230A (en) * | 2019-12-02 | 2021-06-18 | 湖南诚路管业科技有限公司 | Plastic pipe convenient to replace and with abrasion prompt function |
| CN212203439U (en) * | 2020-04-24 | 2020-12-22 | 辽源市长江胶管有限公司 | Floating type built-in armor rubber pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116717725A (en) * | 2023-05-29 | 2023-09-08 | 广东工业大学 | Sea surface oil pipeline |
| CN116717725B (en) * | 2023-05-29 | 2024-02-20 | 广东工业大学 | Sea surface oil pipeline |
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| Publication number | Publication date |
|---|---|
| CN113669516B (en) | 2022-08-30 |
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