CN101788085B - Composite type plastic pipe with wound netting wire and strengthened bell mouth and manufacturing process thereof - Google Patents
Composite type plastic pipe with wound netting wire and strengthened bell mouth and manufacturing process thereof Download PDFInfo
- Publication number
- CN101788085B CN101788085B CN2010101205301A CN201010120530A CN101788085B CN 101788085 B CN101788085 B CN 101788085B CN 2010101205301 A CN2010101205301 A CN 2010101205301A CN 201010120530 A CN201010120530 A CN 201010120530A CN 101788085 B CN101788085 B CN 101788085B
- Authority
- CN
- China
- Prior art keywords
- tube wall
- steel wire
- wall
- diameter
- pipe
- 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.)
- Active
Links
Images
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention relates to a composite type plastic pipe with wound netting wires and strengthened bell mouths, and a manufacturing process thereof. The invention adopts the following technical scheme: the tube ball with a distance of the inner diameter length L to the end part of the bell mouth is a reinforced and thickened wall; the tube wall with a distance of the outer diameter length M to the end part of the bell mouth is a netting wire reinforced wall; and a viscose glue layer, a mark and a protection layer, the wall thickness S, diameter phi and outer diameter D are set according to corresponding ratios; plastic resin mulling-ingredient is utilized as the raw material; and simultaneously, products are manufactured under the synchronous control of a dryer, an extruder, a die head, a die, a vacuum box, a spraying box, a take-up winder, a high-frequency machine, a tractor, a cutter and the like. The technical scheme of the invention overcomes the defect that the axial rigidity of the existing pipe workpiece influences the axial flexibility, geology sinking resistance and tension resistance at the welding part of the bell mouth, as well as the defect that the non-roundness at thejoint of the bell mouth leads the strength and rigidity at the cross section of the joint of the bell mouth of the pipe workpiece to be unable to load tubing pressure when the electrofusion pipe fittings are welded, and the like, thus being suitable for serving as connection pipe workpieces for various water delivery and gas transmission projects, and especially suitable for strengthening pipe walls and thickening the bell mouths of PE, PVC-U, PVC-M and the like.
Description
Technical field
The present invention relates to a kind of steel wire around with socket reinforced composite plastic pipe and preparation process thereof.
Background technique
The processing method that existing commercially available plastic tube has generally all adopted netted enhancing of steel wire or the two-way winding of steel wire to strengthen, the plastic tube of crossing through this disposal methods, be characterized in that axial rigidity is better, but influenced axial ductility because of the enhancing of its axial rigidity, anti-geology sinking, the decline of bellmouth weld pull resistance; They are two years old, tubing through the processing of aforementioned processing method, the connection of its two tube faucet all is to adopt the electric melting pipe fittings welding, during welding because of the temperature height, two kinds of materials are that the different generations with the thermal expansion coefficient of plastics of steel wire separate, in addition, mutually laterally moving of two bellmouth tube walls increases non-" circularity " of tubing bellmouth joint with dislocation and is difficult to assurance and docks quality during welding, and " circularity " is that semidiameter is two concentric circular regions of a certain numerical value on the arbitrary normal section of bellmouth joint; Especially to the tubing of pressure rating lower (being that tube wall is thinner), can more be difficult to guarantee the butt joint quality because of non-" circularity " of tubing bellmouth joint; Its consequence can make tubing bellmouth joint cross-sectional strength and rigidity all can not carry the pipe internal pressure and cause tube material and tube wall bulging, distortion, so that cracking, cause pipe leakage gas leakage, cause water supply, air feed, liquid-supplying system difficult in maintenance, the serious and gas leakage of resources loss causes the pollution to environment; Its three: through the tubing of netted enhancing disposal methods, its reticular body is 1/2nd places that are embedded in pipe thickness, it is many to cause the cost of production and the cost of raw material to increase: its four: the tubing that strengthens disposal methods through two-way winding, it twines body is to be preset at whole root canal wall outside, bring the difficulty of I﹠M for the bellmouth joint, and be abound with to twine to know from experience and cause cost of production and cost of material all higher.
Summary of the invention
At above-mentioned situation, the object of the present invention is to provide a kind of steel wire around with socket reinforced composite plastic pipe, it has simple in structure, and linkage function increases, bellmouth butt joint quality height, the bellmouth cross-sectional strength is big, good rigidly, no fluid resistance, nothing leak hidden danger, No Assets waste, are convenient to engineering construction and system maintenance, safe in utilization, reliable, be easy to penetration and promotion.
Another purpose of the present invention is to provide a kind of technology of making socket reinforced composite plastic pipe, and its preparation process is simple, reliable, handling safety, easy, need not drop into main equipment, the production cost is low, and non-environmental-pollution is easy to construction, installs, safeguards and promotes.
To achieve these goals, a kind of steel wire around with socket reinforced composite plastic pipe, it comprises tube wall and bellmouth, the tube wall of the long L of its bellmouth inner end diameter strengthens wall for thickening, tube wall apart from the long M of bellmouth outer end diameter is that steel wire strengthens wall, steel wire strengthens wall and comprises adhesive-layer, and adhesive-layer peripheral hardware sign, protective coating, steel wire strengthen wall wall thickness S and press mutual corresponding ratio setting with steel wire diameter φ with the tube wall outer diameter D.
For implementation structure optimization, its further step is.
The mutual corresponding ratio that strengthens wall wall thickness S and steel wire diameter φ and tube wall outer diameter D in steel wire is S6.8～28.4mm ︰ φ 0.7～1.10mm ︰ D75～630mm or S6.2～26.7mm ︰ φ 0.7～1.1mm ︰ D75～630mm or S5.6～25.3mm ︰ φ 0.7～1.1mm ︰ D75～630mm or S5.0～23.8mm ︰ φ 0.7～1.1mm ︰ D75～630mm.
The mutual corresponding ratio that strengthens wall wall thickness S and steel wire diameter φ and tube wall outer diameter D in steel wire is S5.5～22.4mm ︰ φ 0.7～1.1mm ︰ D110～630mm or S5.0～21.0mm ︰ φ 0.7～1.1mm ︰ D110～630mm.
The mutual corresponding ratio that strengthens wall wall thickness S and steel wire diameter φ and tube wall outer diameter D in steel wire is S7.7～18.6mm ︰ φ 0.9～1.1mm ︰ D200～630mm.
Strengthen the inner place of wall in thickening and establish transition zone W.
The steel wire that strengthens in the wall in steel wire is a flat wire, and the steel wire spacing is 3-10mm.
In steel wire strengthen steel wire in the wall be spiral around.
In steel wire to strengthen steel wire in the wall be net like around.
The ratio of path length L is 1 ︰ 2 in path length M and the tube wall outside tube wall.
In order to realize above-mentioned another purpose, make a kind of steel wire around with the technology of socket reinforced composite plastic pipe, it makes raw material with the plastic resin mixed ingredients, simultaneously make product under the synchronization control of equipment such as dryer, extruder, die head, mould, vacuum box, spraying box, reeling machine, High-frequency machine, tractor, cutting machine, its operating procedure is as follows:
I, raw material drying processing-dryer;
II, plasticizing are puddled and are extruded-extruder;
III, the constant temperature output-die head of adjusting;
IV, vacuum sizing-mould, vacuum box;
V, the slow running of tube wall internal diameter thickening-tractor, vacuum box;
VI, tube wall internal diameter attenuate-tractor move fast, vacuum box;
VII, the slow running of tube wall internal diameter thickening-tractor, vacuum box;
VIII, spray, cooling-spraying box;
IX, steel wire are around-reeling machine;
X, heating-High-frequency machine;
XI, viscose glue-die head, mould, extruder;
XII, sign, anticorrosion covering-die head, mould, tag line machine, extruder;
X III, vacuum sizing-mould, vacuum box;
X IV, spray, cooling-spraying box;
X V, traction-tractor;
X VI, scale, cut-out-cutting machine.
The present invention mainly strengthens wall at the tube wall of the long L of its tube material and tube wall bellmouth inner end diameter for thickening, tube wall apart from the long M of bellmouth outer end diameter is that steel wire strengthens wall, steel wire strengthens wall and comprises adhesive-layer, adhesive-layer peripheral hardware sign, protective coating, steel wire strengthens wall wall thickness S and makes raw material with the tube wall outer diameter D by mutual corresponding ratio setting and employing plastic resin mixed ingredients with steel wire diameter φ, simultaneously in dryer, extruder, die head, mould, vacuum box, spraying box, reeling machine, High-frequency machine, tractor, make under the synchronization control of equipment such as cutting machine steel wire around with the technological scheme of socket reinforced composite plastic pipe, it has overcome the netted enhancing of existing employing steel wire or the two-way winding Enhancement Method of steel wire is handled the commercially available plastic tube of making, because of the enhancing of its axial rigidity has influenced axial ductility, anti-geology sinking, because of causing tubing bellmouth joint cross-sectional strength and rigidity all can not carry to manage internal pressure, non-" circularity " of tubing bellmouth joint causes the tube material and tube wall bulging during welding of the pull resistance of bellmouth weld and electric melting pipe fittings, distortion, so that cracking, cause pipe leakage gas leakage, cause water supply, air feed, liquid-supplying system is difficult in maintenance, and the serious and gas leakage of resources loss causes defectives such as the pollution of environment and higher cost of production and cost of material.
The beneficial effect that the present invention is produced compared to existing technology:
(a) adopt tube wall to be set to thickening enhancing wall at the long L of its tube material and tube wall bellmouth inner end diameter, tube wall apart from the long M of bellmouth outer end diameter is set to steel wire enhancing wall, and the thickening of steel wire and bellmouth end strengthens the setting that not only is connected mutually but also staggers mutually, make pipe wall thickness reach minimum around steel wire, improved the combination property of bellmouth end, thereby saved a large amount of tube wall materials, saved resource, significantly reduced the cost of material of product;
(b) because the tube material and tube wall external diameter is provided with around steel wire, strengthened the rigidity of tube material and tube wall, and tube material and tube wall is not yielding, anti-geology sinking performance significantly improves;
(c) the product linkage function increases, and makes the melting welding effect of electric melting pipe fittings welding method remarkable, and the bellmouth thickening strengthens, and conveniently installs, and the melting welding butt joint fast, is accurately constructed easily, and is easy to maintenance;
(d) product bellmouth butt joint quality height, the bellmouth thickening strengthens, and same " circularity " of the butt joint of two bellmouths obviously improves, the cross-sectional strength height of bellmouth joint, rigidity, toughness, insulating properties are all good, wear-resisting, corrosion-resistant, and no fluid resistance increases, long service life;
(e) product structure is simple, and preparation process is easy, need not drop into new main equipment, and cost of production is lower;
(f) product is safe in utilization, reliable, has eliminated leakage hidden danger, has saved energy resources, has improved systematic environment, and the cost performance excellence has vast market prospect and promotion potential;
(g) the present invention has enlarged the application area of plastic tubes such as PE, PVC-U, PVC-M.
The present invention is fit to do various water delivery engineerings, the connection tubing of gas transmission engineering; Be particularly suitable for doing the tube wall enhancing and bellmouth thickening of plastic tubes such as PE, PVC-U, PVC-M.
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Description of drawings
Fig. 1 is a sectional view of the present invention.
Fig. 2 be steel wire of the present invention around with the preparation process flow chart of socket reinforced composite plastic pipe.
Fig. 3 be steel wire of the present invention around with wall thickness S, the steel wire diameter φ of socket reinforced composite plastic pipe, the mutual corresponding ratio data table of nominal outside diameter D.
Among the figure: 1, tube wall, 2, bellmouth, 3, thickening strengthens wall, 4, steel wire strengthens wall, 5, steel wire, 6, adhesive-layer, 7, anticorrosive coat, path length in the L-, the outer path length of M-, S-wall thickness, φ-diameter, D-external diameter, W-transition zone, K-spacing.
Embodiment
Referring to accompanying drawing, a kind of steel wire around with socket reinforced composite plastic pipe, it comprises tube wall 1 and bellmouth 2, the tube wall 1 of the long L of its bellmouth 2 inner end diameter strengthens wall 3 for thickening, tube wall 1 apart from the long M of bellmouth 2 outer end diameter strengthens wall 4 for steel wire, have comprehensive preferably in order to make around steel wire 5 two ends and bellmouth 2, identical performance, higher balance quality, more excellent butt joint hot molten characteristic, the ratio of outer path length M and interior path length L is provided with by 1 ︰ 2, steel wire strengthens wall 4 and comprises adhesive-layer 6, adhesive-layer 6 peripheral hardwares sign, protective coating 7, steel wire strengthen wall 4 wall thickness S and press mutual corresponding ratio setting with steel wire 5 diameter phi and tube wall 1 outer diameter D.
Shown in accompanying drawing, D-tube wall 1 nominal outside diameter (mm), S-tube wall 1 wall thickness (mm), φ-steel wire 5 diameters (mm), K-steel wire 5 spacings, L-bellmouth 2 inner end diameter long (mm), M-is apart from bellmouth 2 outer end diameter long (mm), and W-thickeies, subtracts book, addition thick transition area.
With reference to accompanying drawing, in order further to improve the combination property of tubing, improve the axial stiffness of tube material and tube wall, anti-geology sinking, the pull resistance of bellmouth weld, and the intensity of tubing, toughness, insulating properties, wear resistance, corrosion resistance etc.; For efficent use of resources and saving material, steel wire of the present invention is around the mutual corresponding ratio data table setting of press Fig. 3 with wall thickness S, steel wire diameter φ, the nominal outside diameter D of socket reinforced composite plastic pipe,
The invention provides wall thickness S, the steel wire diameter φ of several mode of executions, the mutual corresponding ratio data table of nominal outside diameter D, the value proportion of this table has: the mutual corresponding ratio that steel wire strengthens wall 4 wall thickness S and steel wire 5 diameter phi and tube wall 1 outer diameter D is S6.8～28.4mm ︰ φ 0.7～1.10mm ︰ D75～630mm or S6.2～26.7mm ︰ φ 0.7～1.1mm ︰ D75～630mm or S5.6～25.3mm ︰ φ 0.7～1.1mm ︰ D75～630mm or S5.0～23.8mm ︰ φ 0.7～1.1mm ︰ D75～630mm; The mutual corresponding ratio that steel wire strengthens wall 4 wall thickness S and steel wire 5 diameter phi and tube wall 1 outer diameter D is S5.5～22.4mm ︰ φ 0.7～1.1mm ︰ D110～630mm or S5.0～21.0mm ︰ φ 0.7～1.1mm ︰ D110～630mm; The mutual corresponding ratio that steel wire strengthens wall 4 wall thickness S and steel wire 5 diameter phi and tube wall 1 outer diameter D is S7.7～18.6mm ︰ φ 0.9～1.1mm ︰ D200～630mm.
When influencing passing through of fluid for the tube wall 1 that solves the long L of bellmouth 2 inner end diameter because of thickening, take to strengthen in thickening that wall 3 inner places are provided with thickening, subtract book, addition thick transition area W, it is zero that fluid resistance is reduced to.
In order to improve the adhesive strength of steel wire 5 and tube wall 1, steel wire 5 adopts flat wire, the surface of contact of flat wire and tube wall 1 increases, be easy to form firm adhesive-layer 6 and anticorrosive coat 7, and steel wire 5 can be selected thinner making through flattening for use, for adapting to the needs of different pressures grade in the pipe, its steel wire 5 generally adopt 3-10mm more suitable around spacing K, steel wire 5 be 3mm around spacing K the time, suitable pressure rating is 1.6MPa, steel wire 5 be 10mm around spacing K the time, suitable pressure rating is 1.25MPa; Steel wire 5 and tube wall 1 around mode mainly contain spiral around, net like around.
Referring to accompanying drawing, the present invention make a kind of steel wire around with the technology of socket reinforced composite plastic pipe, at first build up production line by the technological process of establishment, this production line is prepared equipment such as dryer, extruder, die head, mould, vacuum box, spraying box, reeling machine, High-frequency machine, tractor, cutting machine and dosing machine according to operation, make raw material with the plastic resin mixed ingredients simultaneously, make product under the synchronization control of aforementioned each equipment, its operating procedure is as follows:
I, startup dryer, the dosing machine confected materials is carried out drying process;
II, through extruder dried raw material is carried out mixing fusing, i.e. plasticizing is puddled and is extruded;
III, adjust through extruder and die head constant temperature, pipe and output promptly are extruded to shape;
IV, determine the product external diameter through the absorption of vacuum box and mould;
V, travel at the uniform speed at a slow speed in vacuum box, make the thickening of tube wall 1 internal diameter through tractor;
VI, travel at the uniform speed fast in vacuum box, make tube wall 1 internal diameter subtract book through tractor;
VII, travel at the uniform speed at a slow speed in vacuum box, make the thickening of tube wall 1 internal diameter through tractor;
VIII, through spraying box spray, cooling;
IX, steel wire 5 is surrounded on tube wall 1 external diameter with reeling machine;
X, will be surrounded on the steel wire 5 of tube wall 1 external diameter and tube wall 1 heating through High-frequency machine, heating-up temperature is 180 ℃-220 ℃;
XI, carry out viscose glue constant temperature through die head, mould, extruder and adjust, adhesive-layer and output promptly are extruded to shape;
XII, through die head, mould, tag line machine, extruder identify, anticorrosion covering, and the output identification that is extruded to shape, anticorrosive coat;
The X III, determine the product external diameter through vacuum box and mould, and cooling at random;
The X IV, through spraying box spray, cooling;
The X V, continue operation forward by tractor traction;
The X VI, by cutting machine automatically control determine size and cut into the pipe material product of required model length.
Above-mentioned thickening, subtract book, thickening and steel wire around control principle be: tube wall 1 through uniformly thicken, gradually attenuate, evenly attenuate, gradually after the operations such as thickening, uniformly thicken, the tube wall 1 that has become path length L in bellmouth 2 two end part that adhere to specification strengthens wall 3 for thickening, tube wall 1 apart from path length M outside bellmouth 2 two end part strengthens wall 4 for steel wire, carry out fixed ruler cutting through cutting machine, finish through the discharging of discharging frame again, make its steel wire that becomes commercially available gage length size around with socket reinforced composite plastic pipe.
Claims (1)
- A steel wire around with the preparation process of socket reinforced composite plastic pipe, it is characterized in that it comprises tube wall (1) and bellmouth (2), the tube wall (1) of the long L of its bellmouth (2) inner end diameter strengthens wall (3) for thickening, tube wall (1) apart from the long M of bellmouth (2) outer end diameter strengthens wall (4) for steel wire, steel wire strengthens wall (4) and comprises adhesive-layer (6), adhesive-layer (6) peripheral hardware sign, protective coating (7), steel wire strengthen wall (4) wall thickness S and press mutual corresponding ratio setting with steel wire (5) diameter phi and tube wall (1) outer diameter D; Its preparation process is to build up production line by the technological process of establishment earlier, this production line is prepared dryer, extruder, die head, mould, vacuum box, spraying box, reeling machine, High-frequency machine, tractor, cutting machine and dosing machine according to operation, make raw material with the plastic resin mixed ingredients simultaneously, make product under the synchronization control of aforementioned each equipment, its operating procedure is as follows:I, raw material drying processing-startup dryer, the dosing machine confected materials is carried out drying process;II, plasticizing puddle and extrude-through extruder dried raw material is carried out mixing fusing, i.e. and plasticizing is puddled and is extruded;The adjust output-adjust of III, constant temperature through extruder and die head constant temperature, pipe and output promptly are extruded to shape;IV, vacuum sizing-determine the product external diameter through vacuum box and mould absorption;V, tube wall (1) internal diameter thicken-travel at the uniform speed at a slow speed in vacuum box through tractor, make the thickening of tube wall (1) internal diameter;VI, tube wall (1) internal diameter attenuate-travel at the uniform speed fast in vacuum box through tractor make tube wall (1) internal diameter subtract book;VII, tube wall (1) internal diameter thicken-travel at the uniform speed at a slow speed in vacuum box through tractor, make the thickening of tube wall (1) internal diameter;VIII, spray, cooling-spray, cool off through spraying box;IX, steel wire (5) around-with reeling machine steel wire (5) is surrounded on tube wall (1) external diameter;X, heating-will be surrounded on the steel wire (5) and tube wall (1) heating of tube wall (1) external diameter through High-frequency machine, heating-up temperature is 180 ℃-220 ℃;XI, viscose glue-carry out viscose glue constant temperature through die head, mould, extruder to adjust, adhesive-layer and output promptly are extruded to shape;XII, sign, anticorrosion covering-through die head, mould, tag line machine, extruder identify, anticorrosion covering, and the output identification that is extruded to shape, anticorrosive coat;X III, vacuum sizing-determine the product external diameter, and cooling at random through vacuum box and mould;X IV, spray, cooling-spray, cool off through spraying box;X V, traction-continue operation forward by the tractor traction;X VI, scale, cut-out-by cutting machine automatically control determine size and cut into the pipe material product of required model length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101205301A CN101788085B (en) | 2010-03-10 | 2010-03-10 | Composite type plastic pipe with wound netting wire and strengthened bell mouth and manufacturing process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101205301A CN101788085B (en) | 2010-03-10 | 2010-03-10 | Composite type plastic pipe with wound netting wire and strengthened bell mouth and manufacturing process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101788085A CN101788085A (en) | 2010-07-28 |
| CN101788085B true CN101788085B (en) | 2011-06-15 |
Family
ID=42531411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101205301A Active CN101788085B (en) | 2010-03-10 | 2010-03-10 | Composite type plastic pipe with wound netting wire and strengthened bell mouth and manufacturing process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101788085B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105546231A (en) * | 2016-02-29 | 2016-05-04 | 张生兰 | High-strength weather-resisting composite plastic pipe |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6279616B1 (en) * | 1999-08-16 | 2001-08-28 | Thomas C. Croft | Rubber compositions, hose manufactured therefrom, and method of manufacturing hose |
| CN101498387A (en) * | 2008-01-30 | 2009-08-05 | 甘国工 | Metal framework reinforced plastic composite pipes and method for manufacturing the same |
| CN201288902Y (en) * | 2008-11-04 | 2009-08-12 | 王金桥 | Special plastic-steel spiral composite pipe |
| CN201615293U (en) * | 2010-03-10 | 2010-10-27 | 湖南振辉管业有限公司 | Composite plastic pipe with wound steel wire and reinforced socket |
-
2010
- 2010-03-10 CN CN2010101205301A patent/CN101788085B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6279616B1 (en) * | 1999-08-16 | 2001-08-28 | Thomas C. Croft | Rubber compositions, hose manufactured therefrom, and method of manufacturing hose |
| CN101498387A (en) * | 2008-01-30 | 2009-08-05 | 甘国工 | Metal framework reinforced plastic composite pipes and method for manufacturing the same |
| CN201288902Y (en) * | 2008-11-04 | 2009-08-12 | 王金桥 | Special plastic-steel spiral composite pipe |
| CN201615293U (en) * | 2010-03-10 | 2010-10-27 | 湖南振辉管业有限公司 | Composite plastic pipe with wound steel wire and reinforced socket |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101788085A (en) | 2010-07-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100380040C (en) | Coextruding heat winding structure wall pipe, processing method and method | |
| CN201615293U (en) | Composite plastic pipe with wound steel wire and reinforced socket | |
| CN109228390A (en) | A kind of production method of polyethylene dual waves enhancing spiral winding pipe | |
| CN210651966U (en) | Plastic-coated double-flat-wall inner rib steel belt reinforced winding pipe production device | |
| CN102441997A (en) | Co-extrusion thermal winding structure wall tubular product and processing method and mould thereof | |
| CN105538756A (en) | Production method of steel belt reinforced hollow double-flat-wall polyethylene intertwined drainage pipe | |
| CN208687143U (en) | A kind of large-bore plastics pressure pipe, plastics reinforced pipe and plastics duct piece forming die | |
| CN101788084B (en) | Socket reinforced composite plastic pipe and manufacturing process thereof | |
| CN101788085B (en) | Composite type plastic pipe with wound netting wire and strengthened bell mouth and manufacturing process thereof | |
| CN203322531U (en) | Large-diameter low-pressure water-feeding polyethylene gauze winding pipe and device for producing same | |
| CN103335173A (en) | Large-caliber lower pressure water feeding polythene wire mesh winding pipe and production method and production equipment | |
| CN207657131U (en) | A kind of preparation facilities of non-penetrating fado layer continuous hose | |
| CN110549657A (en) | Kera pipe reinforced winding rib supporting pipe and manufacturing method thereof | |
| CN106273334B (en) | A kind of crowded pipe mold for reinforcing glass fiber tubing intensity | |
| CN104118122A (en) | Production technology for large-diameter polyethylene winding-structure pressure pipe | |
| CN209141481U (en) | A kind of process units of polyethylene dual waves enhancing spiral winding pipe | |
| CN103075582B (en) | Large-caliber steel-plate net riveting plastic composite pressure pipe and production method | |
| CN102620064B (en) | Full steel framework enhanced plug type composite pipe | |
| CN101881356B (en) | Steel wire enhanced bell and spigot composite plastic tube and fabrication process thereof | |
| KR102050859B1 (en) | Method and apparatus for jet packing molding polymer pipeline | |
| CN201715118U (en) | Steel-wire enhanced socket composite plastic tube | |
| CN100441930C (en) | Steel pipe skeleton pipe winded with reinforced plastic and processing method | |
| CN201836547U (en) | Socket-enhanced composite plastic pipe | |
| CN210661727U (en) | Plastic-coated double-flat-wall inner rib steel belt reinforced section bar | |
| CN104165250A (en) | Composite pipe formed by winding plastic with netty steel belt and production method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |