CN105042221A - Socket joint type spiral corrugated pipe made of steel strips and reinforced polyethylene, as well as connector and connection method of socket type spiral corrugated pipe - Google Patents
Socket joint type spiral corrugated pipe made of steel strips and reinforced polyethylene, as well as connector and connection method of socket type spiral corrugated pipe Download PDFInfo
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- CN105042221A CN105042221A CN201510546881.1A CN201510546881A CN105042221A CN 105042221 A CN105042221 A CN 105042221A CN 201510546881 A CN201510546881 A CN 201510546881A CN 105042221 A CN105042221 A CN 105042221A
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- tubing
- socket
- spiral
- bellmouth
- flat segments
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
- F16L11/11—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/02—Welded joints; Adhesive joints
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Joints With Sleeves (AREA)
Abstract
The invention discloses a socket joint type spiral corrugated pipe made of steel strips and reinforced polyethylene, which can realize rapid connection on a construction site, as well as a connector, and connection method of the socket joint type spiral corrugated pipe. The socket joint type spiral corrugated pipe mainly comprises socket joints, bellmouths and pipes, wherein the connector structure of the corrugated pipe is formed by the sockets and the bellmouths; flat end mouths are respectively formed in two ends of each of the bellmouths and the sockets; one end connected with one pipe, of each of the sockets and the bellmouths, is provided with a flat straight section with a certain length and a spiral dislocation step; a groove which can allow a sealing rubber gasket to be accommodated is formed in the other end of each socket; guide planes are respectively arranged at the front end and the rear end of the groove in each socket. The connecting method comprises the following steps: the bell mouths and the sockets are respectively matched with the pipes in a welded sealing manner or an adhesive sealing manner, and then, each bellmouth and the corresponding socket are connected in an abutting manner by utilizing an axial advancing device, so that a high-efficiency method for mounting the spiral corrugated pipe made of steel strips and reinforced polyethylene without electricity or fire on the construction site is realized.
Description
Technical field
The present invention relates to a kind of steel band reinforced polyethylene spiral ripple pipe linkage structure and installation way, specifically a kind of spigot and socket type steel band reinforced polyethylene spiral ripple pipe and joint thereof and connecting means.
Background technique
Steel band reinforced polyethylene spiral ripple pipe is integrated with that the high rigidity of steel band and poly rotproofness, frictional resistance are low, the advantage such as to resistance to wear, there is very high ring stiffness, compare all-plastic tubing deeply buried, and integral forming technique is good, seam tensile strength and anti-corrosive properties high, the life-span is longer; Have reliably multiple, easily Placement.With same diameter, compare with the tubing of ring stiffness grade, not only the low especially cost performance of function admirable but also cost is higher for it.Therefore, this tubing has become the bright spot of investment of current large-bore plastics tubing at present.In the connection of this kind of composite pipe, coupling pipe elements and most important with the linkage structure of tubing, otherwise pipe end is easily corroded destruction.Especially because the particularity of cooperation moulded by steel, thus often require higher than other plastic tubes to the requirement of its necessary.Especially there is the steel band enhanced polyethylene bellows of helical corrugation, because its plastic layer is thinner, steel belt layer is comparatively hard and with particularity such as ripples, traditional jointing is often difficult to meet the demands.At present, the Placement that prior art adopts mainly contains following several:
1) hot-melt extruded welding
Hot-melt extruded welding adopts special hot blast to extrude soldering appliance, and first tubing is connected two ends heating, the polyethylene material of melting extruded by welding gun, and the polythene material melting at connecting sewing two ends is connect all-in-one-piece connecting means.
This Placement is high to tubing docking port flatness requirement, requires high to wlding, and greatly affected by environment, needs electricity consumption, rainstorm, has ponding etc. all may cause dry joint, in addition, external welding in usual needs, the minor caliber pipe to less than 800 is difficult to realize, unfavorable to protection steel band;
2) Electric thermal smelting belt welding
Electric thermal smelting belt welding method utilizes the rear high temperature conjunction method produced of electric heating element energising being embedded in joint surface of contact.This way needs electricity consumption equally, in underground fitting operation trouble, and poor sealing performance in the presence of a harsh environment, and for external sealed in small-bore very difficult guarantee, unfavorable to protection steel band;
3) heat-shrinkable tube (band) connecting means
It is adopt fiber reinforcement polyethylene thermal contraction strap to do internal layer that heat-shrinkable tube (band) connects, and heat-shrinkable tube does skin, and heat-shrinkable tube internal surface scribbles hot melt adhesive, after heating with the connecting means that is connected of lock ring that adjacent pipe end is fitted.Method of correcting does not need to use power supply, but needs spray gun, and outdoor installation is affected by environment, ensures interior external sealed for small-bore same being difficult to, unfavorable to protection steel band;
For above-mentioned several traditional Placement, prior art also develops some new Placements, such as Chinese patent CN201651627U describes a kind of thermofusible spigot formula steel band reinforced polyethylene spiral ripple pipe joint, its bellmouth socket is all with tapering, receptacle wall is with hot melt guipure, this way needs special sweat soldering, greatly affected by environment, and joint efficiency is low.The and for example steel band reinforced polyethylene spiral ripple pipe Placement of patent of invention CN100498036C description, connection fittings hold tubular, the docking that the junction surface be connected with tubing has an identical pitch misplaces mouth, by being welded to connect, accessory has smooth outer surface, connects and have vertical flat mouth between accessory, adopts contraction bands or Electric thermal smelting belt to connect, described several way is all be unable to do without electricity or fiery, connects narrow limitation large.Site operation environment is general all relatively more severe, and depend on the bellows connecting means of electricity or fire, operating efficiency and implementation cost are all higher, and can strengthen the difficulty of bellows laying, thus affect construction speed.
Separately have the spigot and socket type steel band reinforced polyethylene spiral ripple pipe joint described by patent CN203686450U, its bellmouth and socket all have the conical surface, and the other end is spiral port, and Placement be unable to do without welding, the modes such as contraction bands.Meanwhile, these bellmouths and socket in storage process, because gravity deforms, especially produce ellipse with the corrugated pipe connector of the conical surface, thus cause spigot-and-socket joint cannot the centering problem of installing.When bellows uses time, generally all need buried in underground, there is certain landfill material above, as earth and so on, so will due to the Action of Gravity Field of earth in radial direction, thus make bellows bear certain pressure in radial direction, inevitably produce certain deformation, can connected element keep good coupled condition and sealing to have important impact for the usability of bellows under such deformation.
Summary of the invention
The object of the present invention is to provide a kind of spigot and socket type steel band reinforced polyethylene spiral ripple pipe joint that can connect fast on-site, realize a kind of efficient installation way fiery need not can installing steel band reinforced polyethylene spiral ripple pipe in building site not electricity consumption; Solving full-plastic tube joint storing in process because weight reasons deforms, especially producing ellipse, thus cause traditional spigot-and-socket joint cannot the centering problem of installing; When solving the buried underground of steel-belt-pipe, connecting head keeps the problem of good coupled condition and sealing.
In order to reach foregoing invention object, the present invention proposes following technological scheme:
A kind of spigot and socket type steel band reinforced polyethylene spiral ripple pipe and joint thereof, comprise socket, bellmouth and tubing, socket and bellmouth form corrugated pipe connector structure jointly; Socket and bellmouth two ends all have smooth port, the one end be connected with tubing all has the flat segments of certain length, a spiral Steps is respectively equipped with on flat segments surface, two flat segments insert tubing inside from the two-port of tubing respectively, flat segments outer wall is close to tubing termination inwall, two spiral Steps mouth that then misplaces with the spiral of tubing two-port matches, and the gap that spiral Steps and tubing spiral misplace between mouth adopts welds or bonding mode is tightly connected; Other one end of socket also has the groove can placing O-ring seal.
Socket has guide surface in groove front end, and guide surface external diameter coordinates with spiral bellmouth root opening; Institute's port recess rear end has guiding surface, and guiding surface gradient is consistent with bellmouth head slope.Guide surface external diameter and spiral bellmouth root form the gap of 0-1mm.
Above-mentioned flat segments wall thickness is more than or equal to tubing lamination wall thickness.
In order to the connection utilizing above-mentioned spigot and socket type steel band reinforced polyethylene spiral ripple pipe joint to realize bellows, also proposed the connecting means of a kind of spigot and socket type steel band reinforced polyethylene spiral ripple pipe
,its key step is as follows:
The first, according to size of pipe and tubing, the flat segments of socket and bellmouth is processed respectively, and spiral Steps, make flat segments outer wall be close to tubing termination inwall;
The second, the connection mouth of tubing is processed, the spiral Steps mouth that just misplaces with tubing spiral is matched;
Three, the welding wire of melting filled up spiral Steps and tubing spiral with welding machine to misplace the gap that mouth connects, or use sealer to connect gap;
Four, cushion rubber is put into the groove of socket, cushion rubber will be close to groove inner wall;
Five, the guide surface (14a) of the socket of tubing aims at the bellmouth of tubing;
Six, installation shaft is to advancing means, and adjustment top positioning means and two side surface positioning devices, make positioning means and tubing close fit, and tighten left and right bolt and top bolt, make whole axial advance device be fixed on tubing;
Seven, turn hex head bolt, ball screw is rotated, promotes tubing by feed screw nut, make its socket enter bellmouth, and guiding surface is close to bellmouth head inclined-plane.
8th, remove axial advance device, adjustment tubing installment state, completes tubing connection.
Further, in order to strengthen sealing that tubing is connected with joint and stability, one deck sealer can also be coated with at flat segments outer surface, then insert tubing connection mouth;
The key component of described sealer is aliphatic isocyanates 15-25%; Polyether polyol 10-20%; Poly-aspartic-acid resin 15-30%; Steric hindrance ammonia chain extender 5-10%; All the other are organosilicon.It is strong that this sealer has ageing resistance, and resistant to liquid medium, oil resistance, the Environmental Conditions for bellows complexity has good applicability.
Described axial advance device comprises double nut ball screw, positioning and clamping mechanism and linkage structure, and feed screw nut is arranged on connecting plate, and side positioning mechanism one end is hinged on connecting plate, and side bindiny mechanism two ends are distinguished in hinged upper junction plate and upper bindiny mechanism; On side bindiny mechanism and side positioning mechanism, correspondence is provided with bolt hole, and left and right bolt is by bolt hole connection side bindiny mechanism and side positioning mechanism; Top bolt connects top positioning means by the tapped hole of upper bindiny mechanism; Screw mandrel two ends are respectively equipped with hex head bolt;
Positioning means and tubing joint are provided with the groove matched with tubing ripple struction, are conducive to location clamping like this.
Spigot and socket type steel band reinforced polyethylene spiral ripple pipe provided by the invention achieves the efficient installation way fiery need not can installing steel band reinforced polyethylene spiral ripple pipe in building site not electricity consumption, the welding procedure step of joint and tubing is completed in factory, avoids utilizing in the job site of bad environments electricity or fire to complete complicated technology, and by arranging flat segments, and spiral misconstruction, joint is made to form with tubing connection part the mode inserted and add and weld, sealing can be ensured, enough intensity can be ensured again, special in the buried underground of pipe racks pipe, tubing and joint all need bear certain gravity and produce deformation, by closely cooperating of flat segments and pipe end, in deformation process, ensure that the conformity of tubing and joint deformation quantity, thus ensure still can keep good sealing under the condition that deformation occurs, the front-end and back-end of groove are all provided with guide surface, by arranging the dual guide structure of this socket bellmouth, solve full-plastic tube joint storing in process because weight reasons deforms, especially ellipse is produced, thus cause traditional spigot-and-socket joint cannot centering install problem, further, the dual guiding of socket bellmouth, effective protective action can be played to cushion rubber, when there is safety distortion to a certain degree in underground in tube connector position, due to the effect of guiding, not there is too large change in the surrounding compress variation of cushion rubber, therefore it is reliable, shock resistance is good.
Accompanying drawing explanation
Fig. 1 is bellmouth figure;
Fig. 2 is socket figure
Fig. 3 is Connection Step figure mono-
Fig. 4 is Connection Step figure bis-
Fig. 5 is that axial advance device installs plan view
Fig. 6 is axial advance device installation side view.
Embodiment
Composition graphs 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, and embodiment is further described in detail technological scheme of the present invention:
As shown in Figure 3, a kind of spigot and socket type steel band reinforced polyethylene spiral ripple pipe joint, mainly comprises socket 1, bellmouth 2, tubing 3, and socket 1 and bellmouth 2 form corrugated pipe connector structure jointly; Bellmouth 1 and socket 2 two ends all have smooth port, and one end that they are connected with tubing 3 all has the flat segments of certain length, and a spiral Steps; It is inner that flat segments 11 and 21 inserts tubing 3, flat segments outer wall is close to tubing termination inwall, spiral Steps 12 and 22 mouth 31 and 32 that then misplaces with tubing matches, and the gap that spiral Steps and tubing spiral misplace between mouth adopts welds or bonding mode is tightly connected; Other one end of socket 1 has the groove 13 can placing O-ring seal.By arranging flat segments and spiral dislocation mating interface, when tubing is connected with joint, flat segments ensure that higher intensity, serve good stable support function, spiral dislocation mating interface makes the gap of tubing and weld or splicing, and when running into radial pressure, certain radial pressure directly can be born in the gap that dislocation coordinates, radial deformation can not be sent and ruptured in gap, thus destroying the state that is tightly connected.
Groove 13 front end has guide surface 14a, the external diameter of guide surface 14a and spiral bellmouth 2 root 23a form the gap of 0-1mm, groove 13 rear end has guiding surface 14b, and the inclination of guiding surface 14b is consistent with the inclination of bellmouth 2 head inclined-plane 23b, cooperatively interacts.The front-end and back-end of groove are all provided with guide surface, define the dual guide structure of socket bellmouth, when plastic pipe union is storing in process because weight reasons deforms, the deformation of ellipse and so on can be produced, because guide surface and bellmouth head are Spielpassung, and this deformation quantity usually can not be very large, first contacted with bellmouth head by guide surface, then advance through certain rotation, the elasticity of plastic pipe can be utilized again to make joint be returned to circular state, thus complete abutting joint smoothly.Meanwhile, the dual guiding of socket bellmouth, can play effective protective action to cushion rubber; when safety distortion to a certain degree occurs in underground in tube connector position, due to the effect of guiding, not there is too large change in the surrounding compress variation of cushion rubber; therefore reliable, shock resistance is good.
Flat segments 11 and 21 wall thickness is more than or equal to tubing lamination wall thickness.
In order to the connection utilizing above-mentioned spigot and socket type steel band reinforced polyethylene spiral ripple pipe joint to realize bellows, spigot and socket type steel band reinforced polyethylene spiral ripple pipe connecting means key step is as follows:
The first, according to the size of tubing 3, the flat segments 11 and 21 of socket 1 and bellmouth 2 is processed respectively, and spiral Steps 12 and 22, make flat segments 11 and 21 outer wall be close to tubing termination inwall;
The second, the connection mouth of tubing 3 is processed, spiral Steps 11 and 22 mouth 31 and 32 that just misplaces with tubing spiral is matched;
Three, the welding wire of melting filled up spiral Steps 12 and 22 and tubing spiral with welding machine to misplace the gap that mouth 31 and 32 connects, or use sealer to connect gap;
Four, cushion rubber 4 is put into the groove 13 of socket 1, cushion rubber 4 will be close to groove 13 inwall;
Five, the guide surface 14a of the socket 1 of tubing 3 aims at the bellmouth 2 ' of tubing 3 ';
Six, installation shaft is to advancing means, and adjustment top positioning means 52 and two side surface positioning devices 55, make positioning means and tubing 3 close fit, and tighten left and right bolt 63 and top bolt 61, make whole axial advance device be fixed on tubing 3;
Seven, turn hex head bolt 53, ball screw 51 is rotated, promotes tubing 3 by feed screw nut 54, make its socket 1 enter bellmouth 2 ', and guiding surface 14b is close to bellmouth 2 ' head inclined-plane 23b '.
8th, remove axial advance device, adjustment tubing 3 installment state, completes tubing connection.
In order to strengthen sealing that tubing is connected with joint and stability, one deck sealer can also be coated with at flat segments outer surface, then insert tubing connection mouth;
Described step one to four completes before dispatching from the factory, and step 5 completes to eight in building site, therefore can reach and improve building site tubing installation rate.
The key component of described sealer is aliphatic isocyanates 15-25%; Polyether polyol 10-20%; Poly-aspartic-acid resin 15-30%; Steric hindrance ammonia chain extender 5-10%; All the other are organosilicon.It is strong that this sealer has ageing resistance, and resistant to liquid medium, oil resistance, the Environmental Conditions for pipe racks pipe complexity has good applicability.
Some otherly can also connect the tackiness agent, pvc pipe sealer etc. that seal for plastic materials, as the sealer of this patent.
Axial advance device comprises double nut ball screw, positioning and clamping mechanism and linkage structure, feed screw nut 54 is arranged on connecting plate 64, side positioning mechanism 55 1 sections is hinged on connecting plate 64, and side bindiny mechanism 65 two ends are distinguished in hinged upper junction plate 64 and upper bindiny mechanism 62; On side bindiny mechanism 65 and side positioning mechanism 55, correspondence is provided with bolt hole, and left and right bolt 63 is by bolt hole connection side bindiny mechanism 65 and side positioning mechanism 55; Top bolt 61 connects top positioning means 52 by the tapped hole of upper bindiny mechanism 62; Screw mandrel two ends are respectively equipped with hex head bolt 53.
Top positioning means 52 and two, left and right side positioning mechanism 55 form three points location on tubing 3 surface, and have well to disposition, positioning means and tubing joint are provided with the groove matched with tubing ripple struction, are conducive to location clamping like this.
Claims (9)
1. a spigot and socket type steel band reinforced polyethylene spiral ripple pipe and joint thereof, comprise socket (1), bellmouth (2), tubing (3), socket (1) and bellmouth (2) form corrugated pipe connector structure jointly, described socket (1) and bellmouth (2) two ends all have smooth port, the one end be connected with tubing (3) all has flat segments (11) and the flat segments (21) of certain length, a spiral Steps (12) and spiral Steps (22) is respectively equipped with on flat segments surface, it is inner that described flat segments (11) and flat segments (21) insert tubing (3) respectively, flat segments outer wall is close to tubing termination inwall, match in then misplace with tubing spiral mouth (31) and (32) of spiral Steps (12) and (22), the gap that spiral Steps and tubing spiral misplace between mouth adopts welds or bonding mode is tightly connected, other one end of described socket (1) has the groove (13) can placing O-ring seal.
2. a kind of spigot and socket type steel band reinforced polyethylene spiral ripple pipe according to claim 1 and joint thereof, it is characterized in that, described socket (1) has guide surface (14a) in groove (13) front end, guide surface external diameter and spiral bellmouth (2) root (23a) Spielpassung; Described socket (1) groove (13) rear end has guiding surface (14b), and guiding surface (14b) gradient is consistent with bellmouth (2) head inclined-plane (23b) gradient.
3. a kind of spigot and socket type steel band reinforced polyethylene spiral ripple pipe according to claim 2 and joint thereof, is characterized in that, described guide surface external diameter and spiral bellmouth (2) root (23a) form the gap of 0-1mm.
4. a kind of spigot and socket type steel band reinforced polyethylene spiral ripple pipe according to claim 1 and joint thereof, is characterized in that, described flat segments (11) and (21) wall thickness are more than or equal to tubing lamination wall thickness.
5. utilize a connecting means for spigot and socket type steel band reinforced polyethylene spiral ripple pipe and joint thereof described in claim 1-4, its key step is as follows:
The first, according to the size of tubing (3), process flat segments (11) and (21) of socket (1) and bellmouth (2) respectively, and spiral Steps (12) and (22), make flat segments (11) and (21) external diameter ensure that outer wall is close to tubing termination inwall;
The second, the connection mouth of tubing (3) is processed, matched in just misplace with tubing spiral mouth (31) and (32) of spiral Steps (12) and (22);
Three, the welding wire of melting filled up spiral Steps (12) and (22) and tubing spiral with welding machine misplace the gap that mouth (31) and (32) connect or use sealer connection gap;
Four, cushion rubber (4) is put into the groove (13) of socket (1), cushion rubber (4) will be close to groove (13) inwall;
Five, the guide surface (14a) of the socket (1) of tubing (3) aims at the bellmouth (2 ') of tubing (3 ');
Six, installation shaft is to advancing means, adjustment top positioning means (52) and two side surface positioning devices (55), make positioning means and tubing (3) close fit, and tighten left and right bolt (63) and top bolt (61), make whole axial advance device be fixed on tubing (3);
Seven, turn hex head bolt (53), ball screw (51) is rotated, promote tubing (3) by feed screw nut (54), make its socket (1) enter bellmouth (2 '), and guiding surface (14b) is close to bellmouth (2 ') head inclined-plane (23b ');
8th, remove axial advance device, adjustment tubing (3) installment state, completes tubing connection.
6. the connecting means utilizing spigot and socket type steel band reinforced polyethylene spiral ripple pipe and joint thereof described in claim 1-4 according to claim 5, it is characterized in that, be coated with one deck sealer in flat segments (11) and (21) outer surface, and then insert tubing (3) connection mouth.
7. sealer according to claim 5, is characterized in that, sealer key component is aliphatic isocyanates 15-25%; Polyether polyol 10-20%; Poly-aspartic-acid resin 15-30%; Steric hindrance ammonia chain extender 5-10%; All the other are organosilicon.
8. axial advance device according to claim 5, it is characterized in that, axial advance device comprises double nut ball screw, positioning and clamping mechanism and linkage structure, feed screw nut (54) is arranged on connecting plate (64), side positioning mechanism (55) one end is hinged on connecting plate (64), and side bindiny mechanism (65) two ends are distinguished in hinged upper junction plate (64) and upper bindiny mechanism (62); Side bindiny mechanism (65) and the upper correspondence of side positioning mechanism (55) are provided with bolt hole, and left and right bolt (63) is by bolt hole connection side bindiny mechanism (65) and side positioning mechanism (55); Top bolt (61) connects top positioning means (52) by the tapped hole of upper bindiny mechanism (62); Screw mandrel two ends are respectively equipped with hex head bolt (53).
9. axial advance device according to claim 8, is characterized in that, positioning means and tubing joint are provided with the groove matched with tubing ripple struction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510546881.1A CN105042221B (en) | 2015-08-31 | 2015-08-31 | Spigot-and-socket steel band reinforced polyethylene spiral ripple pipe and its joint and connection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510546881.1A CN105042221B (en) | 2015-08-31 | 2015-08-31 | Spigot-and-socket steel band reinforced polyethylene spiral ripple pipe and its joint and connection method |
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| CN105042221A true CN105042221A (en) | 2015-11-11 |
| CN105042221B CN105042221B (en) | 2017-10-03 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106671457A (en) * | 2016-11-23 | 2017-05-17 | 广东联塑科技实业有限公司 | Flexible connecting pipe machining method |
| CN108131505A (en) * | 2018-01-31 | 2018-06-08 | 萍乡市大地新材料科技有限公司 | The solid bellows of integral type, the device and method for producing the bellows |
| CN109094068A (en) * | 2018-08-22 | 2018-12-28 | 联塑科技发展(贵阳)有限公司 | A kind of injection molding socket joint flexible connection steel-belt-pipe and application method |
| CN110097990A (en) * | 2018-01-31 | 2019-08-06 | 中国辐射防护研究院 | A kind of simulation container of the high whole container of high density polyethylene (HDPE) |
| CN112648462A (en) * | 2020-12-28 | 2021-04-13 | 联塑市政管道（河北）有限公司 | HDPE double-wall corrugated pipe connecting piece and connecting method thereof |
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| CN110097990A (en) * | 2018-01-31 | 2019-08-06 | 中国辐射防护研究院 | A kind of simulation container of the high whole container of high density polyethylene (HDPE) |
| CN110097990B (en) * | 2018-01-31 | 2023-01-17 | 中国辐射防护研究院 | Simulation container of high-density polyethylene high-integral container |
| CN109094068A (en) * | 2018-08-22 | 2018-12-28 | 联塑科技发展(贵阳)有限公司 | A kind of injection molding socket joint flexible connection steel-belt-pipe and application method |
| CN112648462A (en) * | 2020-12-28 | 2021-04-13 | 联塑市政管道（河北）有限公司 | HDPE double-wall corrugated pipe connecting piece and connecting method thereof |
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| CN105042221B (en) | 2017-10-03 |
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Address after: 510800 No.8, Xixiu Road, Maxi village, Xiuquan street, Huadu District, Guangzhou City, Guangdong Province Patentee after: Ad pipeline (Guangdong) Co.,Ltd. Address before: 510000 East 1, Dongxiu Road, Maxi village, Xinhua Street, Huadu District, Guangzhou, Guangdong Patentee before: GUANGDONG YONGGAO PLASTIC INDUSTRY DEVELOPMENT Co.,Ltd. |
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