AU2021105057A4 - Wood-based winding conveying pipe and preparation method thereof - Google Patents

Wood-based winding conveying pipe and preparation method thereof Download PDF

Info

Publication number
AU2021105057A4
AU2021105057A4 AU2021105057A AU2021105057A AU2021105057A4 AU 2021105057 A4 AU2021105057 A4 AU 2021105057A4 AU 2021105057 A AU2021105057 A AU 2021105057A AU 2021105057 A AU2021105057 A AU 2021105057A AU 2021105057 A4 AU2021105057 A4 AU 2021105057A4
Authority
AU
Australia
Prior art keywords
winding
wood
pipe
veneer
wood veneer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
AU2021105057A
Inventor
Mingjie GUAN
Jiancai Hu
Changtong MEI
Yanming NIng
Fengwen Sun
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Forestry University
Yanling Guangwei Wood Industry Co Ltd
Original Assignee
Nanjing Forestry University
Yanling Guangwei Wood Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanjing Forestry University, Yanling Guangwei Wood Industry Co Ltd filed Critical Nanjing Forestry University
Priority to AU2021105057A priority Critical patent/AU2021105057A4/en
Application granted granted Critical
Publication of AU2021105057A4 publication Critical patent/AU2021105057A4/en
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/14—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood board or veneer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
    • B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
    • B27D1/086—Manufacture of oblong articles, e.g. tubes by spirally winding veneer blanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/34—Organic impregnating agents
    • B27K3/36—Aliphatic compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/34—Organic impregnating agents
    • B27K3/44—Tar; Mineral oil
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
    • B27M1/08—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by multi-step processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
    • B27M3/0013—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles
    • B27M3/006—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles characterised by oblong elements connected both laterally and at their ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
    • B27M3/0013—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles
    • B27M3/0086—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles characterised by connecting using glue
    • 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
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/042—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of wood
    • 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
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/06—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • 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
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/10—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
    • 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
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/05—5 or more layers
    • 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
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—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
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/028—Paper 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
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • 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
    • F16L9/01—Rigid pipes of wood
    • 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
    • F16L9/16—Rigid pipes wound from sheets or strips, with or without reinforcement

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Laminated Bodies (AREA)

Abstract

This invention discloses a wood-based winding conveying pipe and preparation method thereof, which comprises the following critical steps: Winding impregnated adhesive film paper or impregnated fiber cloth to form an inner lining layer. Winding the wood veneer tape to form the middle structural layer. Winding wood veneer tape and impregnating with wood tar, paraffin or tung oil, etc, to form the outer protective layer. The outermost layer is protected and fastened by winding cotton gauze and veneer tape. Every adjacent layers are bonded by normal temperature curing resin or phenolic resin. The winding pipe is impregnated in wood tar, paraffin or tung oil at a certain temperature for curing and shaping. The winding pipe provided by this invention can efficiently utilize fast-growing wood. Its advantages includes but not limited to light weight, good thermal insulation property, high ring stiffness, high water seepage pressure. It can be widely used in water supply and drainage engineering and underground pipe network engineering. 1/1 FIGURES Longitudinal wood veneer tape Tooth shaped- .Wo ie ieto lengthening section Wofbrieto Woodfibedirectio SewingtreadwDiaonalnngl - - - - - - - --------- --------ta pe -- }-------------}-} ----------}-------- -.--.-- r-- ----- r------r r-r-r-r-ee- ... ~~~~Tosae-Wood fiber direction Swn hedDaoa nl

Description

1/1
FIGURES
Longitudinal wood veneer tape
--- Tooth - - - - --------- shaped- --------ta pe .Wo ie ieto lengthening section---------- -- }-------------}-} Wofbrieto }--------
-.--.-- r-- ----- r------r r-r-r-r-ee- ...
~~~~Tosae-Wood fiber direction Swn hedDaoa nl
Woodfibedirectio SewingtreadwDiaonalnngl
Wood-based winding conveying pipe and preparation method thereof
TECHNICAL FIELD This invention relates to a method a method for preparing a conveying pipe by winding and forming a wood veneer belt, which belongs to the field of wood science and technology.
BACKGROUND At present, the market of small-diameter water pipes is dominated by plastic pipes and ductile iron pipes. In addition to concrete water pipes, glass fiber reinforced plastic mortar pipe is an important development direction for large-diameter water pipes, which has advantages such as light weight, convenient hoisting and transportation, and superior anti-corrosion performance. In 2011, the State Council issued Document No.1 "Decision on Accelerating the Reform and Development of Water Conservancy", proposing that the investment in water conservancy construction will reach 4 trillion from 2011 to 2020. By 2015, the country is expected to complete 1.8 trillion investment in water conservancy construction, and 2.2 trillion investment needs to be realized during the 13th Five-Year Plan period. With the overall strategy of China's regional development, the three strategies of serving the construction of "the belt and road initiative", the coordinated development of Beijing-Tianjin-Hebei, the construction of the Yangtze River Economic Belt and the coordinated development of the "four major areas" in the east, middle, west and northeast, the water conservancy industry will enter a new period of rapid construction and development. The preparation of wood-based winding pressure conveying pipe has the advantages of glass fiber reinforced plastic mortar pipe, but it is also lighter weighted about 50%-60% of the weight of plastic mortar pipe, and it has higher compressive and seismic performance combined with better thermal insulation performance and lower production cost. Moreover, fast-growing wood is renewable material and has environment-friendly characteristics, so it has greater competitive advantage to certainly accelerate the development of water conservancy industry.
Bamboo winding pipe is made by winding bamboo curtain after being connected by bamboo filament or bamboo split along longitude and latitude lines (in the axial direction of the pipe). It has large weft gap and low strength, which is mainly filled by resin and filler, resulting in many local defects, poor overall uniformity of the pipe, low compressive strength and tensile strength, etc. In addition, compared with fast-growing wood, the price of bamboo is higher, and the processing efficiency and utilization rate of bamboo are lower (less than 50%). The wood-based winding pressure conveying pipe takes the composite board made of fast-growing wood veneer as winding unit, and has transverse veneer in the axial direction to increase the strength, it not only has uniform and seamless overall structure with less resin consumption, but has high material utilization and great processing efficiency. To sum up, the wood-based winding pressure conveying pipe has more obvious comprehensive advantages including but not limited to lighter pipe quality, high circumferential compressive strength and axial tensile strength, lower manufacturing cost.
SUMMARY One of the purposes of the present invention is to provide a new processing mode of wood with high efficiency and high added value utilization. The other purpose is to provide an environment-friendly biomass pipe product, which can be used as water pipeline, underground pipe gallery, and supporting column pipe. The invention includes the following structural characteristics: (1)Biomass pipe from inside out is mainly composed of natural fiber biomass materials, and the pipe is composed of an inner lining layer, a middle structural layer and an outer protective layer. Among them, the spiral winding directions of adjacent layers are opposite, and two layers are bonded with phenolic resin and resin adhesive with the same weathering resistance. (2)Inner lining of biomass pipe is made by winding 2-4 layers of impregnated adhesive film paper or resin impregnated fiber cloth. (3)The middle structural layer of biomass pipe is made by inter-winding multiple layers of longitudinal wood veneer tapes and diagonal wood veneer tapes.
(4)The outer protective layer of biomass pipe is made by winding 2-4 layers of longitudinal wood veneer tape impregnated with paraffin, wood tar or tung oil as protective agent. Wood-based winding conveying pipe and preparation method thereof of this invention comprises the following steps: Step 1, prepare release layer. Evenly coat a film coating agent on that outer surface of a pipe die, and then winding 1 layer of polypropylene film. Step 2, prepare an inner lining layer. Spirally winding 2-4 layers of impregnate adhesive film paper or resin impregnated fiber cloth on that outer surface of the polypropylene film in sequence of forward and backward. Step 3, prepare structural layer. Uniformly coat 1 layer of unsaturated polyester resin adhesive on that outer surface after the step 2, then spirally winding a plurality of layers of longitudinal wood veneer tapes or diagonal wood veneer tapes in sequence of forward and backward, and uniformly coating phenolic resin adhesive between adjacent layers of wood veneer tapes for bonding. Wherein, several consecutive layers of wood veneer tapes can be longitudinal wood veneer tapes or diagonal wood veneer tapes, or longitudinal wood veneer tapes and diagonal wood veneer tapes can be alternately wound. Longitudinal wood veneer tape is used to improve the internal tensile strength and water seepage pressure of pipes, while diagonal wood veneer tape is used to improve the circumferential compressive strength, axial flexural strength, ring stiffness and longitudinal compressive strength of pipes. Step 4, prepare an outer protective lay. Uniformly coating unsaturated polyester resin on that outer surface aft the step 3, and then spirally winding 2-4 layers of longitudinal wood veneer tapes in sequence of forward and backward. The adjacent layers of wood veneer tapes are uniformly coated with phenolic resin adhesive for bonding. Step 5, wind a layer of cotton gauze after winding the wood strip for fastening effect. Step 6, cure and shape pipes: after the above steps are completed, the pipe die and winding pipe are hoisted into a curing pool containing high-temperature paraffin, wood tar or tung oil, etc., which is heated to cure the adhesive, while the surface veneer is impregnated with paraffin, wood tar or tung oil, etc., for protection. The temperature of the heat medium is controlled at 130-180 0C, and the dipping and curing time is determined according to the thickness of the structural layer, which is generally 0.8-2.5 min/mm. Step 7: demoulding and dimension processing: after the step 5 is finished, the pipe die and the winding pipe are hoisted to a cooling rack, and the pipe die is pulled out when the surface temperature of the winding pipe drops below 400 C. Sawing off burrs at both ends of the winding pipe, and coating protective paint on both ends to make the wood-based winding conveying pipe. The impregnated adhesive film paper refers to the resin impregnated paper which is made of phenolic resin, melamine resin and its modified resin with thermosetting gluing properties through impregnation and drying. The resin impregnated fiber bout refers to glass fiber cloth impregnated with unsaturated resin, epoxy resin and polyurethane resin, or plant fiber cloth (such as hemp fiber, cotton fiber cloth, etc.) made of phenolic resin, melamine resin and its modified resin by impregnating and drying. The longitudinal wood veneer tape refers to the continuous long veneer that is processed by cutting and tooth shaped-lengthening the sliced and rotary cut veneer along the fiber direction with specific width and thickness (as the figure of the present invention shows). The suitable thickness of longitudinal stripe veneer tape is 0.8-1.2mm and the suitable width is 10-20mm and moisture content is 512%. The described diagonal wood veneer refers to the continuous long veneer that is processed by cutting and thread sewing the sliced and rotary cut veneer along nearly vertical direction along the fiber direction (The angle is determined by the winding radius and the width of single winding veneer- namely, by the spiral winding angle) with specific width and thickness (as the figure of the present invention shows). Its width direction is the wood fiber direction. The suitable thickness of diagonal wood veneer is 1.0-2.0mm, , the width is 10-20mm, and moisture content is 512%. At the same time, the thread can improve the tensile strength of the diagonal wood veneer and present the veneer from breaking in the winding process.
BRIEF DESCRIPTION OF THE FIGURES Figure. The longitudinal wood veneer tape schematic diagram Wherein, the longitudinal wood veneer tape refers to the continuous long veneer that is processed by cutting and tooth shaped-lengthening veneer along the fiber direction with specific width and thickness (as the figure of the present invention shows). The suitable thickness of longitudinal stripe veneer tape is 0.8-1.2mm , and the suitable width is 10-20mm and moisture content is 512%. Figure2. The diagonal wood veneer tape schematic diagram Wherein, the diagonal wood veneer refers to the continuous long veneer that is processed by cutting and thread sewing the sliced and rotary cut veneer along nearly vertical direction along the fiber direction (The angle is determined by the winding radius and the width of single winding veneer- namely, by the spiral winding angle) with specific width and thickness (as the figure2 of the present invention shows). Its width direction is the wood fiber direction. The suitable thickness of diagonal wood veneer is 1.0-2.0mm, , the width is 10-20mm, and moisture content is 512%. At the same time, the thread can improve the tensile strength of the diagonal wood veneer and present the veneer from breaking in the winding process.
DESCRIPTION OF THE INVENTION Embodiment 1 The size of the veneer tape used is: the width of the longitudinal wood veneer tape is 15mm and the thickness is 0.8mm, the width of diagonal wood veneer is 15mm and the thickness is 1.2mm. (1) Evenly coating 1 layer of lubricating grease on the surface of stainless steel pipe die with a diameter of 30cm and a length of 6m, and then winding a layer of polypropylene film as a release layer. (2)Winding 2 layers of phenolic resin impregnated paper (width of paper tape is cm, basis weight of paper tape is 100g/m2, resin impregnation amount is 100%, soluble resin content is more than or equal to 75%, volatile matter is less than or equal to 8%).
(3)Evenly coating 1 layer of unsaturated resin on the surface of the wound impregnated paper, and then spirally winding one layer of longitudinal wood veneer tape in sequence of forward and backward direction. (4)Spirally winding 1 layer of diagonal veneer tape in the forward spiral direction. (5)Spirally winding 1 layer of longitudinal wood veneer tape in sequence of forward and backward direction. (6)Spirally winding 1 layer of twill veneer tape in the backward direction. (7)Spirally winding layer of longitudinal wood veneer tape in sequence of forward and backward direction. (Wherein, In the process of step 3, 4, 5 and 6, a layer of phenolic resin adhesive should be evenly coated between two adjacent veneer tapes). (8) Hoisting the pipe mold together with the winding pipe into a curing pool containing high-temperature paraffin wax, controlling the paraffin wax temperature at 1500 C, and impregnating and curing for 12min. (9) Hoisting the pipe die together with the winding pipe to the cooling rack, and pull out the pipe die when the surface temperature of the winding pipe drops below 400 C. Sawing off burrs at both ends of the winding pipe, and coating protective paint on both ends to make the wood-based winding conveying pipe. According to GB/T37805-2019, the wood-based winding conveying pipe has an initial ring stiffness of 17940N/m2, and 1.5 times of water pressure is used for leak detection: it is kept for 2 minutes without leakage.
Embodiment 2 The size of the veneer tape used is: the width of the longitudinal wood veneer tape is 20mm and the thickness is 1.2mm, the width of diagonal wood veneer is 20mm and the thickness is 1.5mm. (1) Evenly coating 1 layer of lubricating grease on the surface of stainless steel pipe die with a diameter of 50cm and a length of 12m, and then winding a layer of polypropylene film as a release layer. (2) Spirally winding 4 layers of unsaturated resin impregnated glass fiber cloth in sequence of forward and backward directions.
(3) Spirally winding 2 layers of longitudinal wood veneer strips in sequence of forward and backward directions. (4) Diagonal veneer tapes and longitudinal veneer tapes (including three layers of diagonal veneer tapes and of longitudinal veneer tapes) are spirally wound at intervals in sequence of forward and backward directions. (5) Spirally winding 1 layer of longitudinal wood veneer tape in sequence of forward and backward directions, finally, wrapping a layer of cotton gauze (Among them, in the process of step 3 and 4, a layer of phenolic resin adhesive should be evenly coated between two adjacent veneer tapes). (6) Hoisting the pipe mold together with the winding pipe into a curing pool containing wood tar, controlling the temperature of wood tar at 1400 C, and impregnating and curing for 20min. (7) Hoisting the pipe die together with the winding pipe to the cooling rack, and pull out the pipe die when the surface temperature of the winding pipe drops below 40°C; Sawing off burrs at both ends of the winding pipe, and coating protective paint on both ends to make the wood-based winding conveying pipe. According to GB/T37805-2019, the wood-based winding conveying pipe has an initial ring stiffness of 22370N/m2, and 1.5 times of water pressure is used for leak detection: it is kept for 2 minutes without leakage. The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Any simple modification, equivalent substitution and improvement made to the above embodiments by any person familiar with this profession according to the technical essence of the present invention without departing from the technical scheme of the present invention still falls within the protection scope of the technical scheme of the present invention.

Claims (6)

  1. THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS: 1. Wood-based winding conveying pipe and preparation method thereof is characterized in structure described as below: (1)Biomass pipe from inside out is mainly composed of natural fiber biomass materials, and the pipe is composed of an inner lining layer, a middle structural layer and an outer protective layer. Among them, the spiral winding directions of adjacent layers are opposite, and each layer is bonded with phenolic resin and resin adhesive with the same weathering resistance. (2)lnner lining of biomass pipe is made by winding 2-4 layers of impregnated adhesive film paper or resin impregnated fiber cloth. (3)The middle structural layer of biomass pipe is made by inter-winding multiple layers of longitudinal wood veneer tapes and diagonal wood veneer tapes. (4)The outer protective layer of biomass pipe is made by winding 2-4 layers of longitudinal wood veneer tape impregnated with paraffin, wood tar or tung oil as protective agent.
  2. 2. Wood-based winding conveying pipe and preparation method thereof, according to claim 1 is characterized in comprising the following steps: Step 1, prepare release layer. Evenly coat a film coating agent on that outer surface of a pipe die, and then winding 1 layer of polypropylene film. Step 2, prepare an inner lining layer. Spirally winding 2-4 layers of impregnate adhesive film paper or resin impregnated fiber cloth on that outer surface of the polypropylene film in sequence of forward and backward direction. Step 3, prepare structural layer. Uniformly coat 1 layer of unsaturated polyester resin adhesive on that outer surface after the step 2, then spirally winding a plurality of layers of longitudinal wood veneer tapes or diagonal wood veneer tapes in sequence of forward and backward direction, and uniformly coating phenolic resin adhesive between adjacent layers of wood veneer tapes for bonding. Wherein, several consecutive layers of wood veneer tapes can be longitudinal wood veneer tapes or diagonal wood veneer tapes, or longitudinal wood veneer tapes and diagonal wood veneer tapes can be alternately wound. Longitudinal wood veneer tape is used to improve the internal tensile strength and water seepage pressure of pipes, while diagonal wood veneer tape is used to improve the circumferential compressive strength, axial flexural strength, ring stiffness and longitudinal compressive strength of pipes. Step 4, prepare an outer protective lay. Uniformly coating unsaturated polyester resin on that outer surface aft the step 3, and then spirally winding 2-4 layers of longitudinal wood veneer tapes in sequence of forward and backward. The adjacent layers of wood veneer tapes are uniformly coated with phenolic resin adhesive for bonding. Step 5, wind a layer of cotton gauze after winding the wood strip for fastening effect. Step 6, cure and shape pipes: after the above steps are completed, the pipe die and winding pipe are hoisted into a curing pool containing high-temperature paraffin, wood tar or tung oil, etc., which is heated to cure the adhesive, while the surface veneer is impregnated with paraffin, wood tar or tung oil, etc., for protection. The temperature of the heat medium is controlled at 130-180 0C, and the dipping and curing time is determined according to the thickness of the structural layer, which is generally 0.8-2.5 min/mm. Step 7: demoulding and dimension processing: after the step 5 is finished, the pipe die and the winding pipe are hoisted to a cooling rack, and the pipe die is pulled out when the surface temperature of the winding pipe drops below 400 C. Sawing off burrs at both ends of the winding pipe, and coating protective paint on both ends to make the wood-based winding conveying pipe.
  3. 3. Wood-based winding conveying pipe and preparation method thereof, according to claim 2, is characterized in that the impregnated adhesive film paper refers to the resin impregnated paper which is made of phenolic resin, melamine resin and its modified resin with thermosetting gluing properties through impregnation and drying.
  4. 4. Wood-based winding conveying pipe and preparation method thereof, according to claim 2, is characterized in that the resin impregnated fiber bout refers to glass fiber cloth impregnated with unsaturated resin, epoxy resin and polyurethane resin, or plant fiber cloth (such as hemp fiber, cotton fiber cloth, etc.) made of phenolic resin, melamine resin and its modified resin by impregnating and drying.
  5. 5. Wood-based winding conveying pipe and preparation method thereof, according to claim 2, is characterized in that the longitudinal wood veneer tape refers to the continuous long veneer that is processed by cutting and tooth shaped-lengthening the sliced and rotary cut veneer along the fiber direction with specific width and thickness (as the figure of the present invention shows). The suitable thickness of longitudinal stripe veneer tape is 0.8-1.2mm , and the suitable width is 10-20mm and moisture content is 512%.
  6. 6. Wood-based winding conveying pipe and preparation method thereof, according to claim 2, is characterized in that the described diagonal wood veneer refers to the continuous long veneer that is processed by cutting and thread sewing the sliced and rotary cut veneer along nearly vertical direction along the fiber direction (The angle is determined by the winding radius and the width of single winding veneer- namely, by the spiral winding angle) with specific width and thickness (as the figure of the present invention shows). Its width direction is the wood fiber direction. The suitable thickness of diagonal wood veneer is 1.0-2.0mm, , the width is 10-20mm, and moisture content is 512%. At the same time, the thread can improve the tensile strength of the diagonal wood veneer and present the veneer from breaking in the winding process.
AU2021105057A 2021-08-06 2021-08-06 Wood-based winding conveying pipe and preparation method thereof Ceased AU2021105057A4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2021105057A AU2021105057A4 (en) 2021-08-06 2021-08-06 Wood-based winding conveying pipe and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU2021105057A AU2021105057A4 (en) 2021-08-06 2021-08-06 Wood-based winding conveying pipe and preparation method thereof

Publications (1)

Publication Number Publication Date
AU2021105057A4 true AU2021105057A4 (en) 2021-09-30

Family

ID=77857837

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2021105057A Ceased AU2021105057A4 (en) 2021-08-06 2021-08-06 Wood-based winding conveying pipe and preparation method thereof

Country Status (1)

Country Link
AU (1) AU2021105057A4 (en)

Similar Documents

Publication Publication Date Title
WO2017177709A1 (en) Small-diameter bamboo-wound composite tube and manufacturing method thereof
CN201651576U (en) Straight bamboo reinforced bamboo compound tube
CN101532592B (en) Environmental protection glass-reinforced plastic pipe and production method thereof
CN105715881B (en) A kind of the bamboo coiled composite tube and its manufacturing method of super large caliber
CN104896211B (en) High-performance wood base composite pressure delivery pipe and preparation method
CN101571213B (en) Preparing method of bamboo fiber winding composite tube
CN202327397U (en) Bamboo composite pressure pipe
WO2017133328A1 (en) Straw and bamboo woven composite pipe and manufacturing method thereof
CN102777708B (en) Fiber-woven pultrusion pipeline and production method
RU2650008C2 (en) Thermo-efficient composite bamboo-sand tube of high pressure
CN204493928U (en) A kind of thermosetting bamboo wood composite pipe
CN101947803A (en) Method for preparing straight bamboo splint reinforced bamboo composite pipe
CN201434160Y (en) Bamboo fiber winding composite pipe
WO2017097250A1 (en) Lining layer of bamboo-wound composite pipe and preparation method therefor
CN205350604U (en) Compound pipe of straw bamboo winding
CN104455793A (en) Continuously knitted composite winding glass steel tube and production method thereof
CN105415475B (en) A kind of manufacture method of continuous long bamboo pipe
CN105507497A (en) Bamboo-wound pipe and cast concrete integrated column for buildings and preparation method of bamboo-wound pipe and cast concrete integrated column for buildings
WO2017133321A1 (en) Bamboo curtain for use with bamboo woven composite product and weaving method thereof
AU2021105057A4 (en) Wood-based winding conveying pipe and preparation method thereof
CN202674573U (en) Finned tube related to fiber weaving pultrusion
CN204665313U (en) Bamboo is wound around composite chimney
CN108119705B (en) Reducing bamboo winding pipe structure and preparation method thereof
CN105563943A (en) High-elastic-modulus reinforced fiber and galvanized steel composite material and preparation process thereof
CN215635483U (en) Bamboo-wood composite winding pipe

Legal Events

Date Code Title Description
FGI Letters patent sealed or granted (innovation patent)
MK22 Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry