CN104401018A - Production equipment of glass fiber reinforced plastic-fiber reinforced concrete composite pipe - Google Patents
Production equipment of glass fiber reinforced plastic-fiber reinforced concrete composite pipe Download PDFInfo
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- CN104401018A CN104401018A CN201410653469.5A CN201410653469A CN104401018A CN 104401018 A CN104401018 A CN 104401018A CN 201410653469 A CN201410653469 A CN 201410653469A CN 104401018 A CN104401018 A CN 104401018A
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Abstract
The invention provides production equipment of a glass fiber reinforced plastic-fiber reinforced concrete composite pipe. The production equipment comprises a hoisting mechanism, a glass fiber reinforced plastic layer forming workstation, a pouring workstation and a demoulding mechanism, wherein the glass fiber reinforced plastic layer forming workstation is used for forming a glass fiber reinforced plastic layer on an inner mould therein; a steel wire mesh is embedded into the glass fiber reinforced plastic layer; bulges combined with a concrete layer as a whole are arranged inside the steel wire mesh; the demoulding mechanism is used for pulling away the inner mould. When the production equipment is used, the glass fiber reinforced plastic layer and the concrete layer of the glass fiber reinforced plastic-fiber reinforced concrete composite pipe produced by the production equipment are in tight combination, so that the tensile strength of the glass fiber reinforced plastic-fiber reinforced concrete composite pipe produced by the production equipment is high and using needs of people on the glass fiber reinforced plastic-fiber reinforced concrete composite pipe can be met; when the production equipment is used, through transfer of the inner mould, switching between the workstations is achieved; the production equipment is high in production efficiency.
Description
Technical field
The present invention relates to a kind of pipe machining equipment, particularly a kind of reinforced plastic glass fibre concrete composite pipe production equipment.
Background technology
Water supply and sewerage pipeline or other liquid conducting pipes is laid in city, in order to reduce the destruction to ground installation, usual employing push-bench by one section of one section of water-supply-pipe in underground forward jacking paving form, therefore very high to the requirement of strength of water-supply-pipe, and water-supply-pipe also will bear high interior pressure simultaneously, to meet the use of high pressure water delivery.
For the preparation of the production equipment of reinforced plastic glass fibre concrete composite pipe in prior art, what it generally adopted is first adopt external mold to prepare to form obtained concrete layer, and then prepare frp layer at concrete layer inwall, wherein sticked by a kind of viscose glue between concrete layer and frp layer.This makes the reinforced plastic glass fibre concrete composite pipe prepared by this production line, radial junction between its frp layer and concrete layer is made a concerted effort more weak, although it can bear huge jacking pressure, but the pulling force that can bear is very little, when the pressure in pipe is larger, frp layer will the outside expansive force of output, this expansive force acts directly on the concrete layer of outer wall, now reinforced concrete floor will bear very large pulling force, when tension is greater than the less ultimate tension of reinforced concrete floor, concrete layer will rise broken and make pipeline breaking.Existing reinforced plastic glass fibre concrete composite pipe in the art simultaneously, its concrete layer and frp layer separate to be prepared, then is sticked by viscose glue, and this complex procedures, production efficiency is low.
Therefore, adopt prior art for generation of the production equipment preparing reinforced plastic glass fibre concrete composite pipe, the user demand of people can not be met.
Summary of the invention
In view of this, the invention provides a kind of reinforced plastic glass fibre concrete composite pipe production equipment for solving the problems of the technologies described above.
A kind of reinforced plastic glass fibre concrete composite pipe production equipment, this production equipment comprises,
Frp layer forming station, for being shaped a frp layer and be embedded at the steel wire of this frp layer, wherein said steel wire extends outward multiple projection from away from the direction of described frp layer, and described frp layer forming station includes internal mold and for driving internal mold to carry out the rotating mechanism rotated;
Build station, for building a concrete layer in the outside of frp layer and making the multiple projections on described concrete layer and described steel wire became one, this is built station and comprises an external mold coordinated with described internal mold;
Mould emptier, for detaching internal mold.
Preferably, described internal mold comprise cylindric in mould body and first rotating shaft of extending from described interior mould body opposite end respectively and the second rotating shaft, the periphery of wherein said first rotating shaft outwards protrudes out a circular limited block, and a groove is offered on its end face, described second rotating shaft is provided with a hook.
Preferably, the two ends that described interior mould body is relative are respectively arranged with flange, and the flange of the contiguous first rotating shaft side of definition is the first flange, and another flange is the second flange, wherein said first flange offers the first installing hole, and its external diameter is greater than the external diameter of the second flange.
Preferably, described interior mould body is provided with the first flange in one end of contiguous first rotating shaft, and offers the first installing hole on the first flange.
Preferably, this production equipment comprises derricking gear further, for transferring internal mold.
Preferably, described external mold includes two symmetrically arranged semicircular body, wherein said semicircular body be outward extended with one first convex tendon along on the both sides, opening portion on its axial direction respectively portion, and on the first convex tendon, offer multiple through hole equably, to be undertaken fastening with bolt, nut by two semicircular body; The side in described semicircular body radially direction upper shed portion is provided with the second convex tendon, and on this second convex tendon, offers the second installing hole, for mating the first installing hole in interior mould body, the first flange offered.
Preferably, the outer circumference surface of described semicircular body is provided with reinforcement.
Preferably, the described mould emptier slippage frame that comprises a cushion block, two power arms, slide rails and be located on slide rail; Described cushion block is set to the arc surface corresponding with external mold, for accommodating external mold in its side end face away from ground; Two described power arm separations are in the both sides of cushion block, and the actuator be provided with in this power arm is horizontally disposed with relative to slippage frame, for driving slippage frame at the enterprising line slip of slide rail; Cross bar in described slippage frame offers an arc groove, and have a stopper slot to lower recess in the cambered surface of this arc groove, for mating the limited block on internal mold.
Preferably, this production line comprises a solidification station further, and it is located at frp layer forming station and builds between station, for being cured the resin contained in the frp layer formed on internal mold.
Preferably, described solidification station is a spin mechanics, and it is plugged in the groove in this internal mold, the first rotating shaft offered by the driving shaft of cutting structure, drives internal mold to rotate.
Due to the utilization of technique scheme, the present invention compared with prior art has following advantages:
Reinforced plastic glass fibre concrete composite pipe production equipment provided by the present invention, by the frp layer forming station be provided with according to this, build station and mould emptier, make this production line when preparing use reinforced plastic glass fibre concrete composite pipe, casting concrete is carried out on its basis being formed with frp layer on internal mold, and then be worth required reinforced plastic glass fibre concrete composite pipe, on the steel wire wherein glass fibre glass inner-lining steel layer is embedded with, outward extending projection and concrete layer became one, and be also embedded with the steel wire having and stretch into concrete layer projection between concrete layer, make the reinforced plastic glass fibre concrete composite pipe prepared via this production equipment, close structure between its frp layer and concrete layer, this greatly enhances the tensile strength of this reinforced plastic glass fibre concrete composite pipe, meet the user demand of people to reinforced plastic glass fibre concrete composite pipe, the production process of this production equipment is simple and direct simultaneously, and production efficiency is high.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to technological means of the present invention can be better understood, and can be implemented according to the content of description, and can become apparent to allow above and other objects of the present invention, feature and advantage, below especially exemplified by embodiment, and coordinate accompanying drawing, be described in detail as follows.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the reinforced plastic glass fibre concrete composite pipe production equipment that present pre-ferred embodiments provides;
Fig. 2 is the structural representation of internal mold in the present invention;
Fig. 3 is the structural representation of external mold in the present invention;
Fig. 4 is the structural representation of mould emptier in the present invention;
Fig. 5 is the sectional view of reinforced plastic glass fibre concrete composite pipe.
Detailed description of the invention
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, be described in detail as follows below in conjunction with accompanying drawing and preferred embodiment:
See Fig. 1; the reinforced plastic glass fibre concrete composite pipe production equipment 100 that the present invention is provided; for the preparation of having high-tensile reinforced plastic glass fibre concrete composite pipe; specifically see Fig. 5, this production equipment 100 comprises frp layer forming station 10, solidification station 20, builds station 30, mould emptier 40 and derricking gear 50.
Described frp layer forming station 10 is for being shaped a frp layer and be embedded at the steel wire 101 of this frp layer, wherein said steel wire 101 extends outward from the direction away from described frp layer the frp layer 103 that multiple protruding 102 prepare this reinforced plastic glass fibre concrete composite pipe, be appreciated that, described protruding 102 are outwards bent to form by this steel wire 101, in order to ensure in the reinforced plastic glass fibre concrete composite pipe prepared via this production equipment 100 structure tight between frp layer 103 and concrete layer 104 further, protruding 102 can be placed with equably at the periphery of this steel wire 101.Its this frp layer forming station 10 specifically includes internal mold 11 and for accommodating and drive internal mold 11 to carry out the rotating mechanism rotated.Be appreciated that, the liner forming station frp layer forming station 10 of the present embodiment in use, internal mold 11 is driven to rotate by rotating mechanism (not shown), and the material on the outer surface of internal mold 11 required for application, to form frp layer 103.Particularly, can be wound around according to this on the outer surface of internal mold 11 thin mould, coated with resins, twisting surface layer, coated with resins, winding grid cloth, suit steel wire 101, be wound around infiltrate have resin glass fibre, coated with resins more afterwards, finally forms required frp layer 103.Wherein above-mentioned infiltration has the glass fibre of resin to need winding 1 to 3 layer, and forms institute's glass layer.Be appreciated that, the reinforced plastic glass fibre concrete composite pipe that production line 100 production equipment 100 of the present embodiment prepares, because its liner have employed glass fiber material, make this reinforced plastic glass fibre concrete composite pipe lightweight like this, and inner surface is smooth corrosion-resistantly not easily adheres to dirt, the buried jacking woven hose such as drinking water pipeline or drainage pipeline can be widely used in.
See Fig. 2, above-mentioned internal mold 11 comprise cylindric in mould body 111 and respectively from the first rotating shaft 112 and the second rotating shaft 113 that described interior mould body 111 opposite end extends.The periphery of described first rotating shaft 112 outwards protrudes out a circular limited block 114, and on its end face, offer a groove 115, such frp layer forming station 10 in use, rotating mechanism drives internal mold 11 to rotate with given pace by the groove 115 that the first rotating shaft 112 offers, and on internal mold 11, prepares required frp layer 103 according to the forming technology of above-mentioned frp layer 103 on the internal mold 11 rotated.The limited block 114 be wherein provided with on the periphery of the first rotating shaft 112 is for coordinating with mould emptier 40, realizes the effect of being carried out by internal mold departing from.The end face of described second rotating shaft 113 is provided with a hook 116; to facilitate the production equipment 100 of the present embodiment in use; select hook 116 to realize moving internal mold 11 with derricking gear 50 hook, make it according to this by solidifying station 20, building station 30, mould emptier 40.
The opposite end of the internal mold 11 of the present embodiment within it mould body 111 is also respectively arranged with flange, the flange of contiguous first rotating shaft 112 side of definition is the first flange 117, another flange is the second flange 118, the external diameter of wherein said first flange 117 is greater than the external diameter of the second flange 118, wherein the external diameter of the second flange 118 is specifically passable, equals the external diameter of frp layer 103 in the reinforced plastic glass fibre concrete composite pipe of this production equipment 100 required preparation in use.Described first flange 117 offers the first installing hole 119, for matching with the external mold 31 of building station 30 in the present embodiment, to realize the frp layer 103 outside to internal mold 11 builds forming concrete layer 104.Be appreciated that, at the flange that two ends of this interior mould body 111 are respectively arranged with, can when this fiberglass forming station 10 forms frp layer 103 on internal mold 11, carry out spacing to each material of this frp layer of composition, and then ensure that the material thickness of two end of the frp layer 103 and middle position prepared via this frp layer forming station 10 is consistent.
Of course, the internal mold 11 of the present embodiment its also can within it in mould body 111 one end of contiguous first rotating shaft 112 be provided with the first flange 117, and on the first flange, offer the first installing hole 119, as from the foregoing, this internal mold 11 can coordinate with external mold 31, to realize building station 30, casting concrete is carried out to the internal mold 11 being formed with frp layer 103, and form a concrete layer 104.
Be appreciated that, via the frp layer 103 that above-mentioned frp layer forming station 10 prepares, the resin contained in its frp layer 103 operationally sticks effect to what play between each material layer, need certain hour to solidify, to make the as a whole structure of frp layer 103 be prepared into via frp layer forming station 10.For this reason, the production equipment 100 of the present embodiment is at frp layer forming station 10 and build being also provided with and solidifying station 20 between station 30.Particularly, the solidification station 20 of the present embodiment is a spin mechanics, and it is cured by driving internal mold 11 to carry out rotating the resin reached containing in the frp layer 103 formed on interior mould body 111 outer circumference surface.
As from the foregoing, in order to realize above-mentioned spin mechanics, driving rotation is carried out to internal mold 11, the spin mechanics of the present embodiment specifically can comprise rack platform (not shown), the two ends of rack platform are respectively arranged with roller set (not shown), for the first rotating shaft 112 and the second rotating shaft 113 of this internal mold 11 accommodating, driving shaft (not shown) wherein for driving internal mold 11 to carry out rotating in this spin mechanics can be arranged to be matched with the cutting structure this internal mold 11 first rotating shaft 112 offering groove 113, and carry out driving rotation by drive motors, and then achieve this spin mechanics the driving of internal mold 11 is rotated.
Described station 30 of building is that wherein concrete layer 104 becames one with multiple protruding 102 on described steel wire 101 for building a concrete layer 104 outside the frp layer 103 formed on internal mold 11 via above-mentioned liner formation station frp layer formation station 10.Particularly, it comprises an external mold external mold 31 coordinated with described internal mold 11.This builds station 30 in use, first internal mold 11 is surrounded with external mold 31, wherein leave certain interval between internal mold 11 and external mold 31, steel reinforcement cage (not shown) is settled in gap afterwards again between external mold 31 and internal mold 11, and then toward casting concrete in it, Deng its solidification, and form a concrete layer 104, and then prepare reinforced plastic glass fibre concrete composite pipe.
See Fig. 3, described external mold 31 includes two symmetrically arranged semicircular body 311, opening portion on the axial direction of described semicircular body 311 is outward extended with one first convex tendon 312, and multiple through hole 313 is offered equably on the first convex tendon 312, and to be undertaken fastening by bolt (not shown), nut (not shown) by two semicircular body 311, and then the encirclement of this external mold 31 pairs of internal molds 11 can be realized.The side in described semicircular body 311 radially direction upper shed portion is provided with the second convex tendon 314, and the second installing hole 315 is offered on this second convex tendon 314, for mating the first installing hole 119 in interior mould body 111, first flange 117 offered, this is made to build station 30 in use, can by connector being interted the second installing hole 315 and the first installing hole 119, with coordinating of realizing that external mold 31 carries out with internal mold 11, and then make this build station 30 operationally, it is toward between external mold 31 and the internal mold 11 being formed with frp layer 103 during casting concrete, its concrete is formed in the outside of this frp layer 103, and the spacing concrete composite pipe of the fiberglass prepared.The present embodiment preferably, the outer circumference surface of external mold 31 semicircular body 311 is provided with reinforcement 316, for improving the bulk strength of this external mold 31, to adapt to the preparation requirement of this production equipment 100.
As from the foregoing, external mold 31 carries out fastening forming by two symmetrical semicircular body 311 bolts, nut, the production equipment 100 of this sample embodiment in use, only needs dismounting connector external mold 31 can be disassembled from reinforced plastic glass fibre concrete composite pipe.Because internal mold 11 is the inside being arranged on this reinforced plastic glass fibre concrete composite pipe, and the volume of this reinforced plastic glass fibre concrete composite pipe is large, Heavy Weight, and this just seems particularly difficult relative to external mold 31 from the dismounting this reinforced plastic glass fibre concrete composite pipe.For this reason, next station that station 30 built by production equipment 100 of the present embodiment is provided with mould emptier 40, for being separated from via building the reinforced plastic glass fibre concrete composite pipe that station 30 prepares by internal mold 11.Be appreciated that, the production equipment 100 of the present embodiment is when carrying out the demoulding to internal mold 11 and external mold 31, first need to depart from internal mold 11, to prevent from, when carrying out the demoulding to internal mold 11, causing damage to the reinforced plastic glass fibre concrete composite pipe prepared via this production equipment 100.
See Fig. 4, described mould emptier 40 comprises a cushion block 41, two power arm 42, slide rails 43 and is located at the slippage frame 44 that slide rail 43 also can carry out slippage relative to slide rail 43.Wherein cushion block 41 is for settling external mold 31, is set to arc surface, to adapt to the structure of external mold 31 in its side end face away from ground.Two power arms 42 are that separation is in the both sides of cushion block 41; actuator 421 is respectively arranged with in it; and promote slippage frame 44 by the expansion link portion of actuator 421; make it at the enterprising line slip of slide rail 43, and then provide this mould emptier 40 operationally by power that internal mold 11 spins off in the reinforced plastic glass fibre concrete composite pipe prepared.Actuator 421 in the power arm 42 of the present embodiment is preferably hydraulic pressure steel, and wherein the steel body of this hydraulic pressure steel is placed in this actuating arm 42, and expansion link portion is vertically arranged relative to slippage frame 44.Cross bar 441 in described slippage frame 44 offers an arc groove 442, for the rotating shaft 112 of this internal mold 11 accommodating, wherein cross bar 441 has a stopper slot 443 to low groove in the cambered surface of this arc groove 442, for mating the limited block 114 in this internal mold 11.Make this mould emptier 40 in use; can the limited block 115 on internal mold 11 first rotating shaft 112 periphery be contained in the stopper slot 443 of this slippage frame 44; and by the expansion link portion of actuator 421 in power arm 42 to the promotion of slippage frame 44; make it drive internal mold 11 to move toward the direction away from reinforced plastic glass fibre concrete composite pipe, namely achieve the effect detaching out by internal mold 11 in reinforced plastic glass fibre concrete composite pipe.
Reinforced plastic glass fibre concrete composite pipe production equipment provided by the present invention in use; first formed at frp layer on the internal mold in station and prepare frp layer according to certain operation; above-mentioned internal mold is transferred afterwards by derricking gear; make its according to this through overcuring station, build station and mould emptier, and prepare reinforced plastic glass fibre concrete composite pipe.Be appreciated that, the reinforced plastic glass fibre concrete composite pipe prepared via this production line, owing to having protruding steel wire, close structure between its frp layer and concrete layer, make the tensile strength of this reinforced plastic glass fibre concrete composite pipe, meet the user demand of people to reinforced plastic glass fibre concrete composite pipe.This production equipment is in the process of preparation simultaneously, and its frp layer and concrete layer are shaped successively, and realize the switching of each operation to the transfer of internal mold, such that this reinforced plastic glass fibre concrete composite pipe production equipment production process is simple and direct, production efficiency is high.
The above, only embodiments of the invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be do not depart from technical solution of the present invention content, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (10)
1. a reinforced plastic glass fibre concrete composite pipe production equipment, is characterized in that: this production equipment comprises,
Frp layer forming station, for being shaped a frp layer and be embedded at the steel wire of this frp layer, wherein said steel wire extends outward multiple projection from away from the direction of described frp layer, and described frp layer forming station includes internal mold and for driving internal mold to carry out the rotating mechanism rotated;
Build station, for building a concrete layer in the outside of frp layer and making the multiple projections on described concrete layer and described steel wire became one, this is built station and comprises an external mold coordinated with described internal mold;
Mould emptier, for detaching internal mold.
2. reinforced plastic glass fibre concrete composite pipe production equipment according to claim 1, it is characterized in that: described internal mold comprise cylindric in mould body and first rotating shaft of extending from described interior mould body opposite end respectively and the second rotating shaft, the periphery of wherein said first rotating shaft outwards protrudes out a circular limited block, and a groove is offered on the end face of described first rotating shaft, described second rotating shaft is provided with a hook.
3. reinforced plastic glass fibre concrete composite pipe production equipment according to claim 2, it is characterized in that: the two ends that described interior mould body is relative are respectively arranged with flange, the flange of the contiguous first rotating shaft side of definition is the first flange, another flange is the second flange, wherein said first flange offers the first installing hole, and its external diameter is greater than the external diameter of the second flange.
4. reinforced plastic glass fibre concrete composite pipe production equipment according to claim 2, is characterized in that: described interior mould body is provided with the first flange in one end of contiguous first rotating shaft, and offers the first installing hole on the first flange.
5. the reinforced plastic glass fibre concrete composite pipe production equipment according to claims 1 or 2, is characterized in that: this production equipment comprises derricking gear further, for transferring internal mold.
6. the reinforced plastic glass fibre concrete composite pipe production equipment according to claim 1,3 or 4, it is characterized in that: described external mold includes two symmetrically arranged semicircular body, wherein said semicircular body be outward extended with one first convex tendon along on the both sides, opening portion on its axial direction respectively portion, and on the first convex tendon, offer multiple through hole equably, to be undertaken fastening with bolt, nut by two semicircular body; The side in described semicircular body radially direction upper shed portion is provided with the second convex tendon, and on this second convex tendon, offers the second installing hole, for mating the first installing hole in interior mould body, the first flange offered.
7. reinforced plastic glass fibre concrete composite pipe production equipment according to claim 6, is characterized in that: the outer circumference surface of described semicircular body is provided with reinforcement.
8. the reinforced plastic glass fibre concrete composite pipe production equipment according to claims 1 or 2, is characterized in that: the slippage frame that described mould emptier comprises a cushion block, two power arms, slide rails and is located on slide rail; Described cushion block is set to the arc surface corresponding with external mold, for accommodating external mold in its side end face away from ground; Two described power arm separations are in the both sides of cushion block, and the actuator be provided with in this power arm is horizontally disposed with relative to slippage frame, for driving slippage frame at the enterprising line slip of slide rail; Cross bar in described slippage frame offers an arc groove, and have a stopper slot to lower recess in the cambered surface of this arc groove, for mating the limited block on internal mold.
9. reinforced plastic glass fibre concrete composite pipe production equipment according to claim 1, it is characterized in that: this production line comprises a solidification station further, it is located at frp layer forming station and builds between station, for being cured the resin contained in the frp layer formed on internal mold.
10. reinforced plastic glass fibre concrete composite pipe production equipment according to claim 9, it is characterized in that: described solidification station is a spin mechanics, it is plugged in the groove in this internal mold, the first rotating shaft offered by the driving shaft of cutting structure, drive internal mold to rotate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410653469.5A CN104401018B (en) | 2014-11-17 | 2014-11-17 | A kind of reinforced plastic glass fibre concrete composite pipe produces equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410653469.5A CN104401018B (en) | 2014-11-17 | 2014-11-17 | A kind of reinforced plastic glass fibre concrete composite pipe produces equipment |
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| CN104401018B CN104401018B (en) | 2017-01-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109742716A (en) * | 2019-01-28 | 2019-05-10 | 宁夏三林管业有限公司 | A kind of multiple tube, pipe-line system, mold and the manufacturing method using it |
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| CN101498390A (en) * | 2009-03-17 | 2009-08-05 | 武汉理工大学 | Glass fibre reinforced plastic and prestress steel cylinder concrete composite pipes and manufacturing process thereof |
| CN204296046U (en) * | 2014-11-17 | 2015-04-29 | 云峰管业有限公司 | A kind of reinforced plastic glass fibre concrete composite pipe production equipment |
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| JPS6122926A (en) * | 1984-07-10 | 1986-01-31 | Sumitomo Electric Ind Ltd | Manufacture of tube body made of fiber reinforced plastics |
| CN101498390A (en) * | 2009-03-17 | 2009-08-05 | 武汉理工大学 | Glass fibre reinforced plastic and prestress steel cylinder concrete composite pipes and manufacturing process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109742716A (en) * | 2019-01-28 | 2019-05-10 | 宁夏三林管业有限公司 | A kind of multiple tube, pipe-line system, mold and the manufacturing method using it |
| CN109742716B (en) * | 2019-01-28 | 2024-05-14 | 宁夏三林管业有限公司 | Composite pipe, pipeline system, die and manufacturing method using same |
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| CN104401018B (en) | 2017-01-04 |
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Address after: Jiaxing City, Zhejiang province 314117 Jiashan County Yao Zhuang Zhen Yu Jia Hui East Road No. 988 Patentee after: Yunfeng Pipe Industry Co., Ltd Address before: Jiaxing City, Zhejiang province 314117 Jiashan County Yao Zhuang Zhen Yu Jia Hui East Road No. 988 Patentee before: YUNFENG PIPE INDUSTRY Co.,Ltd. |