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WO2018149188A1 - 一种内衬塑料管铸铁管及其制造方法 - Google Patents

一种内衬塑料管铸铁管及其制造方法 Download PDF

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Publication number
WO2018149188A1
WO2018149188A1 PCT/CN2017/111477 CN2017111477W WO2018149188A1 WO 2018149188 A1 WO2018149188 A1 WO 2018149188A1 CN 2017111477 W CN2017111477 W CN 2017111477W WO 2018149188 A1 WO2018149188 A1 WO 2018149188A1
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WO
WIPO (PCT)
Prior art keywords
pipe
cast iron
plastic
iron pipe
heating
Prior art date
Application number
PCT/CN2017/111477
Other languages
English (en)
French (fr)
Inventor
肖和飞
尹希伟
Original Assignee
湖南振辉管业有限公司
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 湖南振辉管业有限公司 filed Critical 湖南振辉管业有限公司
Priority to SG11201907511RA priority Critical patent/SG11201907511RA/en
Priority to GB1911610.2A priority patent/GB2573244B/en
Publication of WO2018149188A1 publication Critical patent/WO2018149188A1/zh

Links

Classifications

    • 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
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/26—Lining or sheathing of internal surfaces
    • B29C63/34—Lining or sheathing of internal surfaces using tubular layers or sheathings
    • B29C63/341—Lining or sheathing of internal surfaces using tubular layers or sheathings pressed against the wall by mechanical means
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/001—Pipes; Pipe joints
    • 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
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/0065—Heat treatment
    • B29C63/0069—Heat treatment of tubular articles
    • 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
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/48—Preparation of the surfaces
    • B29C63/481—Preparation of the surfaces mechanically

Definitions

  • the invention relates to a lining plastic pipe cast iron pipe and a manufacturing method thereof.
  • cement lining leads to an increase in the weight of the whole pipe, which is not conducive to construction and installation, and the cement lining is inconvenient to process, poor adhesion, impact and pipe during construction and installation. Deformation is easy to cause the cement to fall off, and the cement lining still has many difficult problems to be solved, so the cement lining is not a good lining method; the epoxy lining is used, because the inner lining layer is easy to delamination, the material cost is high, and the ring The influence of harmful substances generated by the curing process of oxygen resin on water quality and human health is difficult to promote in a large area. Epoxy ceramic lining is used, although it has high adhesion. Finish, but difficult to manufacture large, complex equipment, high cost, only for the special nature of the project, it can not be universally applied.
  • the technical problem to be solved by the invention is to provide a cast iron pipe lined with plastic pipes, which has the advantages of simple structure, easy manufacture, low cost, good mechanical performance, health and environmental protection, good corrosion resistance, long service life, smooth inner wall and water flow resistance. Small, high water delivery efficiency, low energy consumption, high lining adhesion, strong environmental adaptability, high cost performance and easy to popularize.
  • the technical problem to be further solved by the present invention is to provide a method for manufacturing a lining plastic pipe cast iron pipe, which continuously manufactures a plastic composite pipe by continuous casting; after the inner wall of the cast iron pipe is sanded, sandblasting, shot blasting or shot blasting; plastic composite pipe material Pulled into the inner wall of the treated cast iron pipe, through the sealing, aeration, heating, cooling, trimming, spraying, marking process online operation, so as to achieve the production of lining plastic pipe cast iron pipe.
  • the lining plastic pipe cast iron pipe of the invention comprises a cast iron pipe and a plastic composite pipe, wherein the plastic composite pipe is composed of an outer layer hot melt adhesive layer and an inner layer plastic pipe, and the plastic composite pipe material is produced by online.
  • the inner wall of the cast iron pipe is sandblasted, shot blasted or shot blasted, and the plastic composite pipe is drawn into the treated cast iron pipe, and the ends of the plastic composite pipe are sealed and inflated, heated, and then cooled.
  • Cast iron pipe and plastic composite pipe are fixed, trimmed, sprayed, and marked.
  • the plastic composite pipe is drawn into the treated cast iron pipe, placed on the liner platform, and the plastic composite pipe is sealed and inflated at both ends, and the heating device is heated or heated by the moving trolley through the liner platform. Small by moving The car is heated through the pipe.
  • the heating method is induction heating, and may be low frequency, intermediate frequency, high frequency or super audio induction heating, preferably medium frequency induction heating.
  • the cast iron pipe is a socket type ductile iron pipe.
  • the method for manufacturing a lining plastic pipe cast iron pipe of the present invention comprises the following steps:
  • step 2) the thickness of the co-extruded hot melt adhesive layer or the outer hot melt adhesive layer is 0.2-0.5 mm.
  • step 12 the inflation pressure is 0.2 MPa ⁇ 0.05 MPa.
  • the heating temperature is 170 ° C ⁇ 5 ° C within 300 mm from the pipe port, and 150 ° C ⁇ 5 ° C from the pipe port 300 mm.
  • step 13 the heating power or the relative moving speed of the tube and the heating coil is automatically adjusted by the change in temperature to control the heating temperature.
  • step 14 the temperature of the outer wall of the pipe is maintained at 50-60 ° C after cooling.
  • the invention relates to a method for manufacturing a lining plastic pipe cast iron pipe according to the present invention, which comprises preparing a plastic composite pipe whose inner layer is plastic (polyethylene) and outer layer is hot melt adhesive; the inner wall of the cast iron pipe is subjected to internal grinding treatment and then sandblasting, Shot blasting or shot blasting; the plastic composite pipe is drawn into the treated cast iron pipe, and then placed on the liner platform to seal and inflate both ends of the pipe, and the heating device or the heating device is moved by the moving trolley through the liner platform.
  • the trolley is heated through the pipe, sprayed to cool, or the heating device is heated by the moving trolley through the pipe, the trimming machine is trimmed, the sprayer is sprayed, and the printer is marked.
  • the utility model overcomes the existing inner wall of the cement mortar lined with the ductile iron pipe, the water flow resistance is large, the scale is easy to scale, the harmful substances generated by the hardening process of the cement affect the water quality, the thickness of the inner liner is large, the water delivery efficiency is low, the pipe is impacted, The deformed cement is easy to fall off and other defects; it also overcomes the defects of high cost and easy delamination of the existing epoxy resin and epoxy ceramic-lined ductile iron pipe, and the defects of the epoxy resin curing process affecting water quality and employee health.
  • the invention has the following characteristics:
  • the invention adopts the technical scheme of integrally cementing the cast iron pipe and the plastic composite pipe, so that the thickness of the inner liner of the cast iron pipe is reduced, the inner diameter is increased, the water passing capacity and the water transfer efficiency are greatly improved, and the effect of energy saving and consumption reduction is achieved.
  • the inner lining is a plastic tube with low material cost.
  • the invention adopts the technical scheme of integrally cementing the cast iron pipe and the plastic composite pipe, so that the wall of the cast iron pipe becomes smooth, does not scale, the water flow resistance is small, and the comprehensive energy consumption and running cost of the pipe are greatly reduced.
  • the invention adopts the technical scheme of integrally cementing the cast iron pipe and the plastic composite pipe, and the lining plastic completely blocks the contact between the water and the pipe wall of the cast iron pipe, and eliminates the secondary pollution of the water quality during the water conveyance process, so that the water quality becomes More health and wellness.
  • the invention adopts the technical scheme of integrally cementing the cast iron pipe and the plastic composite pipe, so that the ductile iron pipe maintains the good mechanical performance of the cast iron pipe itself, and the inner lining plastic pipe greatly improves the corrosion resistance and service life of the pipeline.
  • the invention adopts the technical scheme of integrally cementing the cast iron pipe and the plastic composite pipe, the inner layer is a polyethylene pipe, the toughness is good, and the inner and outer layers are bonded by hot melt adhesive, which greatly improves the cast iron pipe and the lining polyethylene pipe.
  • the adhesion solves the problem that the inner lining layer is easy to crack, delaminate and fall off, making the construction convenient, quick and simple.
  • the invention adopts the inner wall of the cast iron pipe to make the inner wall of the cast iron pipe smoother and smoother, and then is treated by sand blasting, shot blasting or shot blasting, thereby greatly improving the cast iron pipe and the hot melt adhesive layer and the inner lining plastic pipe.
  • the bonding quality makes the finished pipe smoother and smoother, the water flow resistance will be smaller, and the comprehensive energy consumption and operating cost of the pipe will be lower.
  • the invention is suitable for the production of large-diameter pipes (the prior art is only suitable for pipes with a diameter of less than 500 mm, the present invention It can be adapted to pipes with a diameter of 2600mm or more.
  • the equipment is simple and flexible. It is suitable for factory assembly line, mass production, high production efficiency and low production cost, which greatly enhances the market competitiveness of lining plastic pipe cast iron pipe.
  • the technical scheme of spraying the liner used in the present invention after spraying can accelerate the drying speed of the spraying by using the residual temperature of the heating of the pipe when the liner is combined, and improve the production efficiency.
  • the present invention automatically adjusts the heating power by the change of the heating temperature or the temperature of the heating by the relative movement speed of the pipe and the heating ring, so that the heating temperature of each part of the pipe is uniform, thereby making the cast iron pipe and the hot melt adhesive There is no leakage point on the bonding surface of the layer and the plastic pipe, the product quality is stable, the qualification rate of one molding is high, and the energy saving and environmental protection are high.
  • the lining plastic tube socket type ductile iron pipe of the embodiment comprises a socket type ductile iron pipe and a plastic composite pipe, and the plastic composite pipe is composed of an outer layer hot melt adhesive layer and an inner layer plastic pipe (polyethylene).
  • the plastic composite pipe is made in-line: polyethylene and hot melt adhesive are dried and extruded into a co-extrusion die through an extruder to produce a double-layer plastic with an outer layer of hot melt adhesive and an inner layer of polyethylene.
  • Composite pipe, hot melt adhesive layer thickness is 0.3mm
  • polyethylene layer thickness is 3mm
  • outer diameter is smaller than the inner diameter of ductile iron pipe, 0.5mm, and then vacuum shaping, cooling, traction machine traction, cutting into liner composite forming length.
  • the inner wall of the ductile iron pipe is smoothed by an internal grinder, and then the smoothed ductile iron pipe is sandblasted, shot blasted or shot blasted, and the oxide layer and rust of the inner wall of the ductile iron pipe are cleaned and a certain roughness is obtained. surface.
  • one end of the plastic composite pipe is put into the clamp of the pipe drawing machine, and the spheroidal iron pipe treated with the inner wall is placed on the platform of the pipe drawing machine, and the plastic is placed.
  • the composite pipe is drawn into the ductile iron pipe, and the length required for the liner platform seal head is left at each end of the plastic composite pipe.
  • the pipe is placed on the liner platform running trolley, the two ends of the plastic pipe are sealed by the sealing head, and the compressed air is charged to 0.2 MPa to start the running car and pass the photoelectric switch.
  • the medium frequency induction heating device (the intermediate frequency induction device is used for the existing equipment) is heated, and the heating control system sets the heating temperature of the pipe to be 170 ° C within 300 mm from the socket end, and 150 ° C from the socket end 300 mm, and the heating power is automatically adjusted by the temperature change.
  • the relative movement speed of the pipe and the heating ring to control the heating temperature so that the heating temperature of the pipe meets the temperature program requirements, and the cooling water ring is set along the heating direction of the heating ring 300mm-600mm along the moving direction of the pipe, and the pipe is heated and then cooled by 50°C-60°C.
  • keep the pressure in the pipe for 3-10min unload it into the unloading table, and trim it with the trimming machine; trimming is completed, and the remaining temperature after heating is sprayed by the spraying machine, and the inkjet printer performs the marking.
  • the manufacturing method of the lining plastic tube socket type ductile iron pipe comprises the following steps:
  • Step 13 the following scheme can be used for specific operations: one or more temperature probes are placed on the surface of the ductile iron pipe, and the temperature probe feeds the measured temperature back to the control system, and the control system calculates and sets The difference between the target temperature, the control system automatically adjusts the heating power of the intermediate frequency induction heating device according to the difference, or controls the relative movement speed of the pipe and the induction coil to achieve the desired set target temperature, thereby achieving the ductile iron pipe and There is no leakage point on the bonding surface of the hot melt adhesive layer and the plastic pipe, the inner wall of the inner liner pipe is smooth and flat, the product quality is good, the qualified rate of one-time molding is high, and the automatic production of the assembly line is truly achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)

Abstract

一种内衬塑料管铸铁管及其制造方法，所述内衬塑料管铸铁管包括铸铁管和塑料复合管材，所述塑料复合管材由外层热熔胶层和内层塑料管构成，所述的塑料复合管材经在线制作而成，所述的铸铁管内壁经打磨后进行喷砂、喷丸或抛丸处理，将所述的塑料复合管材拉入处理好的铸铁管内，将塑料复合管材两端密封、充气，加热处理后，冷却，铸铁管与塑料复合管材粘固，修边，喷涂，标识；其能克服现有水泥砂浆内衬球墨铸铁管和环氧树脂、环氧陶瓷内衬球墨铸铁管的缺陷，适合用于给水、燃气、排水、排污、供暖等领域，是理想的输水管材。

Description

一种内衬塑料管铸铁管及其制造方法 技术领域
本发明涉及一种内衬塑料管铸铁管及其制造方法。
背景技术
现有普通铸铁管，因其较好的综合性能，常被用作供水输水管道，为了解决铸铁管防腐问题，最普通的方法是在铸铁管内采用水泥砂浆内衬或环氧树脂、环氧陶瓷内衬为该类管道的首选防腐方式；使用水泥砂浆内衬作为饮用水输水管道，由于内壁不光滑，水流阻力大，且易结垢，水泥硬化产生的反应物质影响水质，内衬厚度较大，达到3-12mm，输水效率较低，水泥内衬导致整个管体重量增大，不利于施工安装，并且水泥内衬加工不方便，附着力差，施工安装过程中的冲击和管材变形容易造成水泥脱落，水泥内衬尚存诸多尚待解决的难点，所以水泥内衬不是好的内衬方式；采用环氧树脂内衬，由于内衬层易分层脱落、材料成本高、环氧树脂固化过程产生的有害物质对水质和人体健康的影响，很难大面积推广，采用环氧陶瓷内衬，虽然会有很高的附着力和光洁度，但制造难度大，设备复杂，成本高，只能用于特殊性工程，无法得到普遍应用。
发明内容
本发明所要解决的技术问题是，提供一种内衬塑料管铸铁管，它结构简单、制作容易、成本低、机械性能好、卫生环保、抗腐蚀性能好、使用寿命长、内壁光滑、水流阻力小、输水效率高、能耗低、内衬附着力高、环境适应性强，性价比高且易于普及推广。
本发明进一步所要解决的技术问题是，提供一种内衬塑料管铸铁管的制造方法，它通过连续在线制作塑料复合管材；铸铁管内壁打磨后进行喷砂、喷丸或抛丸；塑料复合管材拉入内壁处理好的铸铁管内，经密封、充气、加热、冷却、修边、喷涂、标识工序在线操作，从而实现内衬塑料管铸铁管的制作。
本发明解决其技术问题所采用的技术方案是：
本发明之内衬塑料管铸铁管，包括铸铁管和塑料复合管材，所述塑料复合管材由外层热熔胶层和内层塑料管构成，所述的塑料复合管材经在线制作而成，所述的铸铁管内壁经打磨后进行喷砂、喷丸或抛丸处理，将所述的塑料复合管材拉入处理好的铸铁管内，将塑料复合管材两端密封、充气，加热处理后，冷却，铸铁管与塑料复合管材粘固，修边，喷涂，标识。
进一步，将所述的塑料复合管材拉入处理好的铸铁管内，再置于衬管平台上，将塑料复合管材两端密封、充气，通过移动小车穿过衬管平台的加热装置加热或加热装置通过移动小 车穿过管材加热。
进一步，所述的加热方式为感应加热，可为低频、中频、高频或超音频感应加热，优选中频感应加热。
进一步，所述铸铁管为承插式球墨铸铁管。
本发明之内衬塑料管铸铁管的制造方法，包括以下步骤：
A、塑料树脂和热熔胶制作塑料复合管材
1)塑料树脂、热熔胶干燥处理；
2)共挤挤出或热熔胶外涂在塑料管上；
3)真空定型；
4)冷却；
5)牵引；
6)定长切割；
B、铸铁管(包含外壁锌层)内壁处理
7)内壁打磨；
8)喷砂、喷丸或抛丸；
C、拉管
9)夹管；
10)拉入；
D、衬管
11)密封；
12)充气；
13)加热；
14)冷却；
15)修边；
16)喷涂；
17)标识；
E、检测、验收入库。
进一步，为了提高内衬塑料管铸铁管的质量和生产效率，降低能耗和生产成本，其进一步的措施是：
步骤2)中，共挤挤出热熔胶层或外涂热熔胶层的厚度0.2-0.5mm。
步骤12)中，充气气压为0.2MPa±0.05MPa。
步骤13)中，加热温度：距管材端口300mm以内为170℃±5℃，距管材端口300mm以外为150℃±5℃。
步骤13)中，通过温度的变化自动调节加热功率或管材与加热圈相对移动速度以控制加热温度。
步骤14)中，冷却后管材外壁温度保持50-60℃。
本发明之内衬塑料管铸铁管的制造方法，它包括在线制作内层为塑料(聚乙烯)、外层为热熔胶的塑料复合管材；铸铁管内壁经内磨处理后再进行喷砂、喷丸或抛丸处理；将塑料复合管材拉入处理好的铸铁管内，再置于衬管平台将管两端密封、充气，通过移动小车穿过衬管平台的加热装置加热或加热装置通过移动小车穿过管材加热，喷水冷却，或加热装置通过移动小车穿过管材加热，修边机修边，喷涂机喷涂，喷码机标识。它克服了现有水泥砂浆内衬球墨铸铁管存在的内壁不光滑，水流阻力大，易结垢，水泥硬化过程产生的有害物质影响水质，内衬厚度大，输水效率低，管材受冲击、变形水泥易脱落等缺陷；也克服了现有环氧树脂、环氧陶瓷内衬球墨铸铁管制作成本高，易分层，环氧树脂固化过程影响水质和职工健康等缺陷。
与现有技术相比，本发明具有以下特点：
(1)本发明采用铸铁管与塑料复合管材整体粘固的技术方案，使铸铁管内衬厚度减小，内径增大，通水能力和输水效率大大提高，同时达到节能降耗的效果，内衬为塑料管，材料成本低。
(2)本发明采用铸铁管与塑料复合管材整体粘固的技术方案，使铸铁管管壁变得光滑、又不结垢，水流阻力小，管道综合能耗和运行成本大大降低。
(3)本发明采用铸铁管与塑料复合管材整体粘固的技术方案，内衬塑料完全阻隔了水与铸铁管管壁的接触，杜绝了输水过程中水质的二次污染，使水质变得更卫生健康。
(4)本发明采用铸铁管与塑料复合管材整体粘固的技术方案，使球墨铸铁管保持了铸铁管本身良好的机械性能，内衬塑料管使管道抗腐蚀性能和使用寿命大大提高。
(5)本发明采用铸铁管与塑料复合管材整体粘固的技术方案，内层为聚乙烯管，韧性好，内外层采用热熔胶粘接，大大提高了铸铁管与内衬聚乙烯管的附着力，解决了其他内衬方式内衬层易开裂、分层、脱落的问题，使施工变得方便、快捷、简单。
(6)本发明采用对铸铁管内壁进行打磨，使铸铁管内壁更光滑平整，再通过喷砂、喷丸或抛丸工艺处理，大大的提高了铸铁管和热熔胶层、内衬塑料管的粘接质量，使成品管更光滑平整，水流阻力会更小，管道的综合能耗和运行成本会降得更低。
(7)本发明适合于大口径管材的生产(现有技术只适应于口径500mm以下管材，本发 明可适应于口径2600mm以上管材)，同时设备简单灵活，适合于工厂流水线、大批量生产，生产效率高，生产成本低，使内衬塑料管铸铁管市场竞争力大大提高。
(8)本发明采用的衬管复合后进行喷涂的技术方案，可利用衬管复合时管材加热的余温加速喷涂的干燥速度，提高生产效率。
(9)优选地，本发明通过加热温度的变化自动调节加热功率或通过管材与加热圈相对移动速度来达到温度加热的稳定性，使管材各部位加热温度均匀，从而使铸铁管与热熔胶层及塑料管粘接面无漏点，产品质量稳定，一次成型合格率高，且节能环保。
具体实施方式
下面结合实施例对本发明作进一步的说明。
实施例
本实施例之内衬塑料管承插式球墨铸铁管，包括承插式球墨铸铁管和塑料复合管材，所述塑料复合管材由外层热熔胶层和内层塑料管(聚乙烯)构成。
所述的塑料复合管材经在线制作而成：聚乙烯和热熔胶干燥处理，分别经挤出机挤出至共挤模具，制作出外层为热熔胶、内层为聚乙烯的双层塑料复合管材，热熔胶层厚度为0.3mm，聚乙烯层厚度为3mm，外径比球墨铸铁管内径小0.5mm，再经过真空定型、冷却，牵引机牵引、切割成衬管复合成型所需要的长度。
所述的球墨铸铁管内壁经内磨机打磨平整，再将打磨平整的球墨铸铁管经喷砂、喷丸或抛丸，使球墨铸铁管内壁氧化层、铁锈清除干净并得到一定粗糙度的磨砂面。
为了保证内衬塑料管顺利拉入球墨铸铁管内并方便密封头密封内衬塑料管，将塑料复合管一端套入拉管机夹具，内壁处理好的球墨铸铁管置于拉管机平台，将塑料复合管拉入球墨铸铁管内，塑料复合管两端各留出衬管平台密封头所需要的长度。
为了保证球墨铸铁管与内衬塑料管粘结为一体，将管材置于衬管平台运行小车上，塑料管两端经密封头密封，充入压缩空气至0.2MPa，启动运行小车，通过光电开关启动中频感应加热装置(中频感应装置为现有设备)加热，加热控制系统设置管材加热温度为距插口端300mm以内为170℃，距插口端300mm以外为150℃，通过温度的变化自动调节加热功率或管材与加热圈相对移动速度以控制加热温度，使管材加热温度符合温度程序要求，沿管材移动方向距离加热圈300mm-600mm设置冷却水环，管材加热后进行淋水冷却50℃-60℃，同时，保持管材内气压3-10min，卸入卸料台，用修边机进行修边；修边完成，利用加热后的余温经喷涂机进行喷涂，喷码机进行喷码标识。
所述的内衬塑料管承插式球墨铸铁管的制造方法，包括以下步骤：
A、聚乙烯和热熔胶制作塑料复合管
1)聚乙烯、热熔胶干燥处理—烘干机；
2)共挤挤出—挤出机、共挤模具；
3)真空定型—定径套、真空箱；
4)冷却—喷淋水箱；
5)牵引—牵引机；
6)定长切割—切割机；
B、承插式球墨铸铁管(包含外壁锌层)内壁处理
7)内壁打磨—内磨机；
8)喷砂、喷丸或抛丸—喷砂机、喷丸机或抛丸机；
C、拉管
9)夹管—夹具；
10)拉入—拉管机；
D、衬管
11)密封—密封头；
12)充气—充气管；
13)加热—中频感应加热装置、运行小车；
14)冷却—喷水环；
15)修边—修边机；
16)喷涂—喷涂机；
17)标识—喷码机；
E、检测、验收入库。
步骤13)，可以采用如下方案进行具体操作：将1个或多个测温探头置于球墨铸铁管的表面，测温探头将测得的温度反馈到控制系统，控制系统计算出与所设定目标温度的差值，控制系统根据该差值自动调节中频感应加热装置的加热功率，或控制管材与感应圈相对移动的速度，达到所需最佳的设定目标温度，从而达到球墨铸铁管与热熔胶层及塑料管粘接面无漏点，内衬管内壁光滑平整，产品质量好，一次性成型合格率高，真正达到流水线自动化生产。

Claims (10)

  1. 一种内衬塑料管铸铁管，其特征在于：包括铸铁管和塑料复合管材，所述塑料复合管材由外层热熔胶层和内层塑料管构成，所述的塑料复合管材经在线制作而成，所述的铸铁管内壁经打磨后进行喷砂、喷丸或抛丸处理，将所述的塑料复合管材拉入处理好的铸铁管内，将塑料复合管材两端密封、充气，加热处理后，冷却，铸铁管与塑料复合管材粘固，修边，喷涂，标识。
  2. 根据权利要求1所述的内衬塑料管铸铁管，其特征在于：将所述的塑料复合管材拉入处理好的铸铁管内，再置于衬管平台上，将塑料复合管材两端密封、充气，通过移动小车穿过衬管平台的加热装置加热或加热装置通过移动小车穿过管材加热。
  3. 根据权利要求2所述的内衬塑料管铸铁管，其特征在于：所述的加热方式为感应加热。
  4. 根据权利要求3所述的内衬塑料管铸铁管，其特征在于：所述的感应加热为低频、中频、高频或超音频加热。
  5. 一种内衬塑料管铸铁管的制造方法，其特征在于，包括以下步骤：
    A、塑料树脂和热熔胶制作塑料复合管材
    1)塑料树脂、热熔胶干燥处理；
    2)共挤挤出或热熔胶外涂在塑料管上；
    3)真空定型；
    4)冷却；
    5)牵引；
    6)定长切割；
    B、铸铁管内壁处理
    7)内壁打磨；
    8)喷砂、喷丸或抛丸；
    C、拉管
    9)夹管；
    10)拉入；
    D、衬管
    11)密封；
    12)充气；
    13)加热；
    14)冷却；
    15)修边；
    16)喷涂；
    17)标识；
    E、检测、验收入库。
  6. 根据权利要求5所述的内衬塑料管铸铁管的制造方法，其特征在于，步骤2)中，共挤挤出热熔胶层或外涂热熔胶层的厚度为0.2-0.5mm。
  7. 根据权利要求6所述的内衬塑料管铸铁管的制造方法，其特征在于，步骤12)中，充气气压为0.2MPa±0.05MPa。
  8. 根据权利要求7所述的内衬塑料管铸铁管的制造方法，其特征在于，步骤13)中，加热温度：距管材端口300mm以内为170℃±5℃，距管材端口300mm以外为150℃±5℃。
  9. 根据权利要求8所述的内衬塑料管铸铁管的制造方法，其特征在于，步骤13)中，通过温度的变化自动调节加热功率或管材与加热圈相对移动速度以控制加热温度。
  10. 根据权利要求9所述的内衬塑料管铸铁管的制造方法，其特征在于，步骤14)中，冷却后管材外壁温度保持50-60℃。
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