CN102720942A - Steel belt material and method for manufacturing spiral drain pipe by using same - Google Patents
Steel belt material and method for manufacturing spiral drain pipe by using same Download PDFInfo
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- CN102720942A CN102720942A CN2012100228663A CN201210022866A CN102720942A CN 102720942 A CN102720942 A CN 102720942A CN 2012100228663 A CN2012100228663 A CN 2012100228663A CN 201210022866 A CN201210022866 A CN 201210022866A CN 102720942 A CN102720942 A CN 102720942A
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Abstract
The invention relates to a steel belt material and a method for manufacturing a spiral drain pipe by using the same. The steel belt material comprises a belt material body which is shaped through extrusion molding and is internally provided with a plurality of cavities extending in the length direction; and steel belts are inlayed in a rib of the belt material body. The method for manufacturing a spiral drain pipe by using the steel belt material comprises the following four steps: extruding to form a steel belt material; forming a molded continuous steel belt material after shaping and cooling; winding the continuous steel belt materials to form continuous tube materials and bonding two bonding faces of the steel belt material; compacting the outer surface by using an adjustable pressure wheel to form a whole tube material; and cooling and cutting the continuous tube material to form a spiral drain pipe. The steel belt material and the drain pipe manufactured by using the steel belt material are stable in the structure and reliable in the tube connection, and are suitable for non-excavation works. The invention also relates to a method for manufacturing the spiral drain pipe by using the steel belt material.
Description
Technical field
The present invention relates to steel and mould the drainage pipe technical field, specifically a kind of steel plastic band material and utilize this band to make the method for spiral drain.
Background technique
Polyethylene plastic-steel spirally-wound pipe industry standard CJ/T 270-2007 makes its tubing have ring stiffness higher in the similar plastic drain pipe because it has the unique texture of external spiral tendon, and is as shown in Figure 1.But this tubing is owing to adopt the stud structure, and in process of production, vertical steel band is easy to occur down the situation of muscle; Thereby cause the ring stiffness of tubing sharply to descend, and, generally all leave the open air in because the bore of tubing is generally all bigger; Stack strict requirement is highly arranged; Tubing stack to surpass two-layer will overwhelming following tubing stud, and a week will occur down the situation that muscle or tubing ftracture exposing to the weather to surpass, and that this phenomenon shows on-site is more outstanding; In shipment, the phenomenon of colliding with can occur unavoidably, an end of tubing is impaired through regular meeting so, behind the building site, will handle impaired the cutting with special tool in tubing end again tubing and seal problem, and the on-the-spot water experiment of closing once is difficult to pass through.Have is exactly that the plastic protective layer at this plastic-steel outside reinforcement top of twining waste pipe is extremely thin again; If in the construction handling process, run into the situation of destroying plastic outer layer; Steel band as strengthening usefulness is easy to receive corrosion failure; Thereby the intensity of losing, the intensity of so whole tubing also just sharply reduce, even forfeiture; The 3rd, the band part is very weak, and tensile strength is very low; Because vertical structure, do not advise adopting the suit mode during tubing transportation, owing to be easy to parts of plastics wearing and tearing like this tubing stud part, and also can not sleeve pipe during sleeve pipe too much and cause the excessive stud that causes of weight to collapse, thus cause cost of transportation too high; Outer pipe wall is a vertical structure, can not be used for trenchless engineering, can not use as dilatory pipe; When adopting electric heating to melt Placement, can only weld at pipe material inner wall, need to use special-purpose supporting frock, frock is heavy, the very inconvenient and very difficult airtight performance that guarantees of connection; A little less than polyethylene part in the used band of manufacturing polyethylene plastic-steel spirally-wound pipe material and tubing overlap polyethylene are all extremely thin, in hoisting process, be easy to occur disconnected pipe phenomenon.
A kind of two flat walls tubing of in patent 201020172030.8, announcing, in the condition of same ring stiffness, the weight of the weight ratio polyethylene plastic-steel spirally-wound pipe of tubing increases greatly; And to suppress shaping to steel band in producing, when twining band, want two polyethylene extruders, and outer layer polyethylene be the hot melt state; At this moment steel band has certain flexiblely, the steel band artificial situation that stretches tight can often occur, and it is not firm to bond; And operation is many, complex process, and the polyethylene consumption is big; The increase of tubing cost is very big, the tubing of especially less caliber.Because the thermal shrinkage of tubing is inhomogeneous, inside and outside wall is unsmooth, and dangerous during the tubing welding, easy generation is leaked and seeped water phenomenon.
The polyethylene steel band of in patent 200820089887, announcing strengthens the hollow winding structure wall pipe; This wall pipe has the characteristic of hollow hole and band steel band; Specifically how not realize making but have this wall pipe of clear and definite proposition, in the production of reality, need further carry out lot of test and optimal design.
Summary of the invention
The object of the present invention is to provide a kind of steel plastic band material and utilize this band to make the method for spiral drain; This steel plastic band material is high, wear-resistant, the anti-base material that ruptures, is easy to make of a kind of ring stiffness; Utilize the total of the waste pipe of its manufacturing to stablize, tubing connects reliable, and is applicable to trenchless engineering; Invention simultaneously utilizes this band to make the method for spiral drain, provides a kind of spiral drain incorporate manufacturing process.
The present invention solves the technological scheme that its technical problem takes: a kind of steel plastic band material; The band body that comprises extrusion moulding; It is characterized in that, be provided with the some cavitys that extend in the longitudinal direction in said band body interior, and in the internal rib of said band body, be inlaid with steel band; So not only utilize the antiseptic property of plastics but also utilized the rigidity of steel band, guaranteed underground pipe material ring stiffness, owing to have hollow structure, reduced the consumption of plastics simultaneously, increased substantially the cost performance of tubing.
Wavy staggered concaveconvex structure is adopted in the junction, side of said band body; Increased the area of contact when two sides are bonding greatly; More firm when making tubing bonding, improved the joint strength of tubing greatly, guaranteed higher draw tensile strength; Can be widely used in the middle of the trenchless engineering, do dilatory tubing and use.
Method through twining utilizes this band can produce spiral drain, and the waste pipe tubing produced of this method can carry out rolling with storage band machine and put in the warehouse and store, and saves the space, and can raise the efficiency;
A kind of method of utilizing the steel plastic band material to make spiral drain is characterized in that, may further comprise the steps:
Step 1; With carbon steel cold-rolled strip raw materials in sequence through uncoiling, cut out in the compound extrusion die of weldering, flattening, rust cleaning, oil removing, heating rear haulage to extruder; In compound extrusion die, feed the polyolefin plastics of fusion simultaneously, after extruder is extruded, form said steel plastic band material; Because what the production of steel plastic band material was adopted is continuously the compound mode of production of extruding; The steel band that uses then is the method for supplying that adopts the steel coil strip coiled steel belt disk of certain-length, thus in process of production steel band need connect could guarantee that band produces continuously and stablize;
Step 2, said plastic-steel band are moved the continuous plastic-steel band that after typing and cooling, forms moulding backward, accomplish the preparation of plastic-steel band;
Step 3, said continuous plastic-steel band is towed to Stetch Wrapping Machine, forms continuous tubing through twining; Interface carries out The pre-heat treatment with hot blast in plastic-steel band both sides to twine the while; And then extrude the plastics of fusion to interface with small-sized extruder; Two interfaces of plastic-steel band are carried out bonding, but carry out compacting with a pressure adjusting roller outer surface simultaneously, and then form whole tubing;
Step 4, said continuous tubing form spiral drain through cooling and cutting again.
Further; In step 1; To use uncoiler, steel band to cut welding machine, flat rubber belting machine and heating generator in described uncoiling, sanction weldering, flattening and the heating process; Carbon steel cold rolled steel tep reel is installed on the back shaft of uncoiler 1, and, is total to the N root by drawing a steel band respectively after the uncoiling of N platform uncoiler; Steel band after the uncoiling gets into flat rubber belting machine 4 after steel band is cut welding machine 2 and stored up band machine 3; And on storage band machine 3, surface derusting device, degreasing unit and surperficial sanding device are set; Steel band after flat rubber belting machine 4 flattens carries out secondary oil removing and heat treated through heating generator 5 backs to steel strip surface again; Make the steel strip surface temperature reach 180 ℃～220 ℃; Steel band after heat-treating gets in the compound extrusion die 6 and the polyolefin plastics of extruder 17 fusions carries out compound extruding, and forms said steel plastic band material; The structure of compound extrusion die is corresponding with the shape of the band of being produced.
Further, in step 2, said steel plastic band material through the typing platform finalize the design with water cooling after form continuous steel plastic band material.
Further, in order to satisfy the moulding needs and the water temperature requirements of band, the circulating water that disposes in 16 pairs of typings of handpiece Water Chilling Units platform 7 freezes to enhance productivity.
Further; In step 3; Steel plastic band material 18 behind the cooling forming continuously in the entering Stetch Wrapping Machine 12, can cut with band cast-cutting saw 9 for off-gauge strip, in order to prevent the long phenomenon that mops floor that causes of band under the common traction of tractor 8 and tractor 11; In the middle of two tractors, be provided with band carriage 10, a small-sized extruder and Wrapping formed cage are arranged in Stetch Wrapping Machine 12; Under the synergy of Wrapping formed cage constraint and laminating mechanism; The steel plastic band material is wound in continuous pipe shape tubing; Twine and carry out The pre-heat treatment in the left and right sides of band interface with hot blast simultaneously; And then extrude the plastics of fusion with small-sized extruder to the interface place, but two interfaces of steel plastic band material carry out bondingly carrying out compacting with a pressure adjusting roller outer surface simultaneously, and then form whole tubing.
Further, in step 4, for improving the manufacturing efficiency of tubing, the cooling of tubing adopts water-cooling pattern that tube surfaces is cooled off; When continuously producing, tubing advances at fixing frame 13 upper edge tubing axial directions; Carry out fixed length cutting for the tubing that requires certain-length with tubing cast-cutting saw 14; Form the spiral drain finished product, the waste pipe after the cutting temporarily is placed on one can be along on the movable stand 15 of tubing axial motion.
The invention has the beneficial effects as follows:
The waste pipe tubing that utilizes this steel plastic band material to roll has following characteristics:
1, adopts vertical reinforced structure in the steel plastic band material, use the ring stiffness maximization of the tubing that this band rolls;
2, roll the protection that the back forms double-layer plastic, in process of production, avoided the traditional vertical steel band to be easy to occur down the situation of muscle, thereby guaranteed the ring stiffness of tubing;
3, the tubing that rolls is because outer wall is the planomural structure, and tubing intensity is stacked and highly can suitably be put height, the stacking phenomenon of falling the muscle of polyethylene plastic-steel spirally-wound pipe can not occur;
4, because tubing has the protection of outer layer plastic, when depositing out of doors, can avoid exposes to the weather causes tubing the situation of muscle or tubing cracking to occur falling;
5, adopt double-layer plastic as protection, the rupture strength of tubing strengthens greatly, and tensile strength is high;
6, because outer surface is the planomural structure, can adopt the suit mode during tubing transportation, and can also can too much not cause the parts of plastics wearing and tearing of tubing stud part the excessive stud that causes of weight to collapse because of sleeve pipe, cause cost of transportation thereby reduce;
7, outer pipe wall is the planomural structure, and the characteristics of plastics are that surface friction drag is little, can be widely used in trenchless engineering, also can use as dilatory pipe, for improving field operation efficient and sizable effect has been played on the protection road surface;
8, because the outer surface of tubing is the planomural structure, can adopt dispatch from foreign news agency hot melt Placement, need not use special-purpose supporting frock; Connect very conveniently and firm, and the material of welding consumables and tubing is identical, and the welding back forms perfectly whole; Guarantee the airtight performance of tubing, Never-leakage;
9, band twines when forming tubing, and the welding surface of contact can improve the intensity of weld greatly widely, guarantees the integrally stretching intensity of tubing.
Below all being the advantage of utilizing the waste pipe tubing of this band manufacturing, is this preparation process's beneficial effect below:
10, adopt this spiral tubing production technology, manufacturing efficiency is high, and reject rate is extremely low simultaneously;
11, steel band is adopted surperficial frosting technology, make the bonding tightr of plastics and steel band, intensity is higher;
12, adopt the radio frequency heating processor, it is good, environment friendly and pollution-free to remove steel strip surface greasy dirt and heats;
13, band adopts the vacuum cooling mode, and cooling effectiveness is high, forming;
14, band and tubing once-through, efficient is high, and the auxiliary PLC module controls that adopts in front and back, and synchronism is good, and the adjustment speed of production is extremely convenient.
Description of drawings
Fig. 1 is traditional spiral drain structural representation;
Fig. 2 is the interface schematic representation of steel plastic band material;
Fig. 3 is the drainage pipe that utilizes the preparation of steel plastic band material;
Fig. 4 is preparation process's flow chart;
Among the figure: 21 band bodies, 22 cavitys, 23 steel bands, 24 concaveconvex structures, 25 weld seams, 1 uncoiler; 2 steel bands are cut welding machine, 3 storage band machines, 4 flat rubber belting machines, 5 heating generators, 6 compound extrusion dies; 7 typing platforms, 8 tractors, 9 band cast-cutting saws, 10 band carriages, 11 tractors, 12 Stetch Wrapping Machines, 13 fixing frames; 14 tubing cast-cutting saws, 15 movable stands, 16 handpiece Water Chilling Units, 17 extruders, 18 steel plastic band materials.
Embodiment
Like Fig. 2, shown in Figure 3, a kind of steel plastic band material comprises the band body 21 of extrusion moulding, is provided with the some cavitys 22 that extend in the longitudinal direction in the band body interior, and in the internal rib of band body, is inlaid with steel band 23; So not only utilize the antiseptic property of plastics but also utilized the rigidity of steel band, guaranteed underground pipe material ring stiffness, owing to have hollow structure, reduced the consumption of plastics simultaneously, increased substantially the cost performance of tubing.
Simultaneously adopt wavy staggered concaveconvex structure 24 in the junction, side of band body 21; Fashionable in adjacent band bulk junction like this, increased the area of contact when two sides are bonding greatly, more firm when making tubing bonding; Improved the joint strength of tubing greatly; Guaranteed higher draw tensile strength, can be widely used in the middle of the trenchless engineering, done dilatory tubing and use.
It is as shown in Figure 4,
Form a kind of spiral drain through winding, happy and harmonious welding processing, comprise the plastic-steel band body 21 and weld seam 25 of spiral, this kind utilizes the steel plastic band material to make the method for spiral drain, may further comprise the steps:
Step 1; With carbon steel cold-rolled strip raw materials in sequence through uncoiling, cut out in the compound extrusion die of weldering, flattening, rust cleaning, oil removing, heating rear haulage to extruder; In compound extrusion die, feed the polyolefin plastics of fusion simultaneously, after extruder is extruded, form said steel plastic band material; Because what the production of steel plastic band material was adopted is continuously the compound mode of production of extruding; The steel band that uses then is the method for supplying that adopts the steel coil strip coiled steel belt disk of certain-length, thus in process of production steel band need connect could guarantee that band produces continuously and stablize.Further; In step 1; Will use uncoiler, steel band to cut welding machine, flat rubber belting machine and heating generator in described uncoiling, sanction weldering, flattening and the heating process, annexation is such, and carbon steel cold rolled steel tep reel is installed on the back shaft of uncoiler 1; And, be total to the N root by drawing a steel band respectively after the uncoiling of N platform uncoiler; Steel band after the uncoiling gets into flat rubber belting machine 4 after steel band is cut welding machine 2 and stored up band machine 3; And on storage band machine 3, surface derusting device, degreasing unit and surperficial sanding device are set; Steel band after flat rubber belting machine 4 flattens carries out secondary oil removing and heat treated through heating generator 5 backs to steel strip surface again; Make the steel strip surface temperature reach 180 ℃～220 ℃, the steel band after heat-treating gets in the compound extrusion die 6 and the polyolefin plastics of extruder 17 fusions carries out compound extruding, and forms the steel plastic band material; The structure of compound extrusion die is corresponding with the shape of the band of being produced.
Step 2, said plastic-steel band are moved the continuous plastic-steel band that after typing and cooling, forms moulding backward, accomplish the preparation of plastic-steel band; Further, in step 2, the steel plastic band material through the typing platform finalize the design with water cooling after form continuous steel plastic band material.Further, in order to satisfy the moulding needs and the water temperature requirements of band, the circulating water that disposes in 16 pairs of typings of handpiece Water Chilling Units platform 7 freezes to enhance productivity.
Step 3, said continuous plastic-steel band is towed to Stetch Wrapping Machine, forms continuous tubing through twining; Interface carries out The pre-heat treatment with hot blast in plastic-steel band both sides to twine the while; And then extrude the plastics of fusion to interface with small-sized extruder; Two interfaces of plastic-steel band are carried out bonding, but carry out compacting with a pressure adjusting roller outer surface simultaneously, and then form whole tubing; Further; In step 3, the steel plastic band material 18 behind the cooling forming continuously in the entering Stetch Wrapping Machine 12, can cut with band cast-cutting saw 9 for off-gauge strip under the common traction of tractor 8 and tractor 11; In order to prevent the long phenomenon that mops floor that causes of band; In the middle of two tractors, be provided with band carriage 10, a small-sized extruder and Wrapping formed cage are arranged in Stetch Wrapping Machine 12, Wrapping formed cage is a kind of mould of cylinder shape; Under the synergy of Wrapping formed cage constraint and laminating mechanism; The steel plastic band material is wound in continuous pipe shape tubing; Twine and carry out The pre-heat treatment in the left and right sides of band interface with hot blast simultaneously; And then extrude the plastics of fusion with small-sized extruder to the interface place, but two interfaces of steel plastic band material carry out bondingly carrying out compacting with a pressure adjusting roller outer surface simultaneously, and then form whole tubing.
Step 4, said continuous tubing form spiral drain through cooling and cutting again.Further, in step 4, for improving the manufacturing efficiency of tubing, the cooling of tubing adopts water-cooling pattern that tube surfaces is cooled off; When continuously producing, tubing advances at fixing frame 13 upper edge tubing axial directions; Carry out fixed length cutting for the tubing that requires certain-length with tubing cast-cutting saw 14; Form the spiral drain finished product, the waste pipe after the cutting temporarily is placed on one can be along on the movable stand 15 of tubing axial motion.
Except that the described technical characteristics of specification, be the known technology of those skilled in the art.
Claims (8)
1. steel plastic band material comprises it is characterized in that the band body of extrusion moulding, is provided with the some cavitys that extend in the longitudinal direction in said band body interior, and in the internal rib of said band body, is inlaid with steel band.
2. a kind of steel plastic band material according to claim 1 is characterized in that wavy staggered concaveconvex structure is adopted in the junction, side of said band body.
3. a method of utilizing steel plastic band material described in claim 1 or 2 to make spiral drain is characterized in that, may further comprise the steps,
Step 1; With carbon steel cold-rolled strip raw materials in sequence through uncoiling, cut out in the compound extrusion die of weldering, flattening, rust cleaning, oil removing, heating rear haulage to extruder; In compound extrusion die, feed the polyolefin plastics of fusion simultaneously, after extruder is extruded, form said steel plastic band material;
Step 2, said plastic-steel band are moved the continuous plastic-steel band that after typing and cooling, forms moulding backward;
Step 3, said continuous plastic-steel band is towed to Stetch Wrapping Machine, forms continuous tubing through twining; Interface carries out The pre-heat treatment with hot blast in plastic-steel band both sides to twine the while; And then extrude the plastics of fusion to interface with small-sized extruder; Two interfaces of plastic-steel band are carried out bonding, but carry out compacting with a pressure adjusting roller outer surface simultaneously, and then form whole tubing;
Step 4, said continuous tubing form spiral drain through cooling and cutting again.
4. a kind of method of utilizing the steel plastic band material to make spiral drain according to claim 3; It is characterized in that; In step 1, to use uncoiler, steel band to cut welding machine, flat rubber belting machine and heating generator in described uncoiling, sanction weldering, flattening and the heating process, carbon steel cold rolled steel tep reel is installed on the back shaft of uncoiler (1); And, be total to the N root by drawing a steel band respectively after the uncoiling of N platform uncoiler; Steel band after the uncoiling gets into flat rubber belting machine (4) after steel band is cut welding machine (2) and storage band machine (3); And on storage band machine (3), surface derusting device, degreasing unit and surperficial sanding device are set; Steel band after flat rubber belting machine (4) flattens passes through heating generator (5) back again steel strip surface is carried out secondary oil removing and heat treated; Make the steel strip surface temperature reach 180 ℃～220 ℃; Steel band after heat-treating gets in the compound extrusion die (6) and the polyolefin plastics of extruder (17) fusion carries out compound extruding, and forms said steel plastic band material; The structure of compound extrusion die is corresponding with the shape of the band of being produced.
5. a kind of method of utilizing the steel plastic band material to make spiral drain according to claim 3 is characterized in that, in step 2, said steel plastic band material through the typing platform finalize the design with water cooling after form continuous steel plastic band material.
6. a kind of method of utilizing the steel plastic band material to make spiral drain according to claim 5; It is characterized in that; In order to satisfy the moulding needs and the water temperature requirements of band, dispose handpiece Water Chilling Units (16) circulating water in the typing platform (7) is freezed to enhance productivity.
7. a kind of method of utilizing the steel plastic band material to make spiral drain according to claim 3; It is characterized in that; In step 3; Steel plastic band material (18) behind the cooling forming continuously in the entering Stetch Wrapping Machine (12), can use band cast-cutting saw (9) to cut for off-gauge strip under the common traction of tractor (8) and tractor (11), in order to prevent the long phenomenon that mops floor that causes of band; In the middle of two tractors, be provided with band carriage (10), a small-sized extruder and Wrapping formed cage are arranged in Stetch Wrapping Machine (12); Under the synergy of Wrapping formed cage constraint and laminating mechanism; The steel plastic band material is wound in continuous pipe shape tubing; Twine and carry out The pre-heat treatment in the left and right sides of band interface with hot blast simultaneously; And then extrude the plastics of fusion with small-sized extruder to the interface place, but two interfaces of steel plastic band material carry out bondingly carrying out compacting with a pressure adjusting roller outer surface simultaneously, and then form whole tubing.
8. a kind of method of utilizing the steel plastic band material to make spiral drain according to claim 3 is characterized in that, in step 4, for improving the manufacturing efficiency of tubing, the cooling of tubing adopts water-cooling pattern that tube surfaces is cooled off; The tubing axial direction advanced in fixing frame (13) upper edge when tubing was continuously produced; Carry out fixed length cutting for the tubing that requires certain-length with tubing cast-cutting saw (14); Form the spiral drain finished product, the waste pipe after the cutting temporarily is placed on one can be along on the movable stand (15) of tubing axial motion.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100228663A CN102720942A (en) | 2012-02-02 | 2012-02-02 | Steel belt material and method for manufacturing spiral drain pipe by using same |
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| CN2012100228663A CN102720942A (en) | 2012-02-02 | 2012-02-02 | Steel belt material and method for manufacturing spiral drain pipe by using same |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103302848A (en) * | 2013-06-17 | 2013-09-18 | 开源塑业科技（南通）有限公司 | Manufacture technology of plastic steel winding pipe |
| CN103353027A (en) * | 2013-06-18 | 2013-10-16 | 山东天迈管业有限公司 | Double-flat wall steel-plastic composite pipe and manufacturing method thereof |
| CN104908348A (en) * | 2015-04-15 | 2015-09-16 | 云南森发塑胶制品有限公司 | Hollow wall coiling plastic tube production method |
| CN105423004A (en) * | 2015-12-31 | 2016-03-23 | 广西钦州国通管业有限公司 | Multipurpose polyethylene steel-plastic composite pipe |
| CN107504288A (en) * | 2017-09-30 | 2017-12-22 | 广西金盛科技发展有限公司 | RF steel plastic compounts strengthen winding pipe |
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| CN201875297U (en) * | 2010-10-12 | 2011-06-22 | 华瀚科技有限公司 | Double-flat-wall winding pipe lap joint structure and double-flat-wall pipe using same |
| CN201909123U (en) * | 2011-01-26 | 2011-07-27 | 谭江南 | Reticular steel bar reinforced type double hollow abnormal steel belt steel-plastic composite pipe material |
| CN202360918U (en) * | 2011-12-13 | 2012-08-01 | 广东国恒塑业发展有限公司 | Steel rib reinforced plastic hollow-wall twined pipe and formed strip thereof |
| CN202532160U (en) * | 2012-02-02 | 2012-11-14 | 阴法军 | Plastic-steel belt material |
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| US4830694A (en) * | 1985-12-12 | 1989-05-16 | Shiro Kanao | Method of manufacturing pressure withstanding pipe |
| CN201875297U (en) * | 2010-10-12 | 2011-06-22 | 华瀚科技有限公司 | Double-flat-wall winding pipe lap joint structure and double-flat-wall pipe using same |
| CN201909123U (en) * | 2011-01-26 | 2011-07-27 | 谭江南 | Reticular steel bar reinforced type double hollow abnormal steel belt steel-plastic composite pipe material |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103302848A (en) * | 2013-06-17 | 2013-09-18 | 开源塑业科技（南通）有限公司 | Manufacture technology of plastic steel winding pipe |
| CN103302848B (en) * | 2013-06-17 | 2015-09-09 | 开源塑业科技（南通）有限公司 | A kind of plastic-steel spirally-wound pipe manufacturing process |
| CN103353027A (en) * | 2013-06-18 | 2013-10-16 | 山东天迈管业有限公司 | Double-flat wall steel-plastic composite pipe and manufacturing method thereof |
| CN103353027B (en) * | 2013-06-18 | 2015-11-25 | 山东天迈管业有限公司 | A kind of manufacture method of Double-flat wall steel-plastic composite pipe |
| CN104908348A (en) * | 2015-04-15 | 2015-09-16 | 云南森发塑胶制品有限公司 | Hollow wall coiling plastic tube production method |
| CN105423004A (en) * | 2015-12-31 | 2016-03-23 | 广西钦州国通管业有限公司 | Multipurpose polyethylene steel-plastic composite pipe |
| CN107504288A (en) * | 2017-09-30 | 2017-12-22 | 广西金盛科技发展有限公司 | RF steel plastic compounts strengthen winding pipe |
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