CN202252455U - Screw sleeve type internal expansion connecting structure for steel-plastic composite pipes - Google Patents

Screw sleeve type internal expansion connecting structure for steel-plastic composite pipes Download PDF

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Publication number
CN202252455U
CN202252455U CN2011203084212U CN201120308421U CN202252455U CN 202252455 U CN202252455 U CN 202252455U CN 2011203084212 U CN2011203084212 U CN 2011203084212U CN 201120308421 U CN201120308421 U CN 201120308421U CN 202252455 U CN202252455 U CN 202252455U
Authority
CN
China
Prior art keywords
pipelines
sleeve
plastic composite
cutting ferrule
thread bush
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.)
Withdrawn - After Issue
Application number
CN2011203084212U
Other languages
Chinese (zh)
Inventor
冉超
付志敏
李贤梅
邹镇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GOODY TECHNOLOGY Co Ltd
GUDI PLASTIC ELECTRIC APPLIANCE CO Ltd CHONGQING
Original Assignee
GOODY TECHNOLOGY Co Ltd
GUDI PLASTIC ELECTRIC APPLIANCE CO Ltd CHONGQING
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GOODY TECHNOLOGY Co Ltd, GUDI PLASTIC ELECTRIC APPLIANCE CO Ltd CHONGQING filed Critical GOODY TECHNOLOGY Co Ltd
Priority to CN2011203084212U priority Critical patent/CN202252455U/en
Application granted granted Critical
Publication of CN202252455U publication Critical patent/CN202252455U/en
Anticipated expiration legal-status Critical
Withdrawn - After Issue legal-status Critical Current

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Abstract

The utility model discloses a screw sleeve type internal expansion connecting structure for steel-plastic composite pipes. The screw sleeve type internal expansion connecting structure for the steel-plastic composite pipes comprises a screw thread sleeve and a clamping sleeve which are arranged coaxially and in parallel, wherein a screw sleeve for adjusting the distance between the screw thread sleeve and the clamping sleeve is sleeved outside the screw thread sleeve and the clamping sleeve; then end part of the screw thread sleeve, which is far away from the clamping sleeve, and the end part of the clamping sleeve, which is far away from the screw thread sleeve, are provided with an annular shoulder protruded radially inwards respectively; two pipelines to be butted are extended from the annular shoulders of the screw thread sleeve and the clamping sleeve respectively; each extending section of the two pipelines to be butted expanded radially outwards to an annular expansion projection; the two expansion projections are propped against the two annular shoulders respectively; and bushing blocks which are sleeved outside the two pipelines to be butted are arranged between the two expansion projections in a propping mode. The two sides of each expansion projection are propped by the end parts of the annular shoulders and the bushing blocks, so the expansion projections is not subjected to recoverable deformation easily and the pipelines are not pulled out even if the pull-out forces applied to the pipelines are overlarge, and the pull-out preventing capacity of the connecting structure is effectively improved. The expansion projections are not deformed easily, so the positions of the pipe orifices are relatively fixed and the pipelines are sealed reliably.

Description

Expanded joint access node structure in the spiral type steel-plastic composite pipe
Technical field
The utility model relates to a kind of seal for pipe joints linkage structure, particularly a kind of structure that is tightly connected of steel-plastic composite pressure pipe.
Background technique
Advantages such as steel-plastic composite pipe is a kind of emerging composite pipe tubing, and it has, and bearing capacity is strong, good corrosion resistance, linear expansion coeffcient are little at present, are applied to more and more that petroleum gas is carried, industrial and mineral is with various fields such as pipe, water drinking tube, waste pipes.
For solving the quick-sealing connectivity problem of steel-plastic composite pipe; Multiple linkage structure has been proposed in the existing technology; Wherein, The structure that employing dilates connection with its have not tube reducing, anti-pull-out force is strong, sealing is reliable, be convenient to advantage such as dismounting becomes application linkage structure the most widely, the existing linkage structure that dilates generally is through threaded collar and snap ring two to be had to dilate protruding pipe to be connected and confine and be in the same place, like the disclosed linkage structure of patent ZL200510113148.7 " the interior expanded joint jointed tubular workpieces of steel-plastic composite pressure pipe special use "; But still there are following two shortcomings in the above-mentioned linkage structure that dilates: 1) anti-pull-out force receives the restriction of steel strength in the steel-plastic composite pipe; When pull-out force is excessive, dilate and protruding still possibly be extruded and be out of shape the size that returns to normal caliber, cause pipeline to connect and throw off; 2) even expansion is protruding can not to come off, also be easy to generate small deformation under the effect of pull-out force, the sealing generation harmful effect that this will connect pipeline when being used for conveying such as hot water, high-pressure medium when pipeline, is easy to generate seepage.
To above-mentioned deficiency, need the existing linkage structure that dilates is improved, further increase its resistance to plucking and take off ability, simultaneously, make its sealing more reliable.
Summary of the invention
In view of this; The utility model provides expanded joint access node structure in a kind of spiral type steel-plastic composite pipe; This linkage structure supports two through the increase lining and dilates convexity, stops to dilate protruding recovery distortion under the situation that receives big pull-out force, and reaching significantly increases the purpose that dilates the anti-pull-out force of linkage structure; In addition, also can effectively improve the sealing reliability that dilates linkage structure.
Expanded joint access node structure in the spiral type steel-plastic composite pipe of the utility model; Comprise coaxial thread bush that is set up in parallel and cutting ferrule; Thread bush and cutting ferrule are with the swivel nut of regulating both distances outward; Thread bush all is provided with radially to projecting inward annular shoulder away from the end of cutting ferrule and the cutting ferrule end away from thread bush, waits to dock pipeline for two and is stretched into by the annular shoulder place of thread bush and cutting ferrule respectively, all radially outwards dilates out annular on the dip section that two are waited to dock pipeline and dilates convexity; Two dilate convexity and hold out against two annular shoulders respectively, and two dilate to hold out against between the convexity to be provided with and are placed in two and wait to dock the outer lining of pipeline.
Further, the axially support step is set on the cylindrical of said cutting ferrule, the internal thread of said swivel nut cooperates with the outside thread of thread bush, and the axial tension step of axially support step is withstood in swivel nut one end setting;
Further, be provided with two overlapped O-ring seals between said two mouths of pipe of waiting to dock pipeline, O-ring seal is provided with the sleeve that stretches into the corresponding mouth of pipe;
Further, the internal diameter of said lining equates with the external diameter of two pipelines to be connected.
The beneficial effect of the utility model: expanded joint access node structure in the spiral type steel-plastic composite pipe of the utility model, comprise coaxial thread bush that is set up in parallel and cutting ferrule, thread bush and cutting ferrule are with the swivel nut of regulating both distances outward; Thread bush all is provided with radially to projecting inward annular shoulder away from the end of cutting ferrule and the cutting ferrule end away from thread bush; Wait to dock pipeline for two and stretched into by the annular shoulder place of thread bush and cutting ferrule respectively, all radially outwards dilate out annular on the dip section that two are waited to dock pipeline and dilate convexity, two dilate convexity and hold out against two annular shoulders respectively; Two dilate to hold out against between the convexity to be provided with and are placed in two and wait to dock the outer lining of pipeline; Because dilating protruding both sides is withstood by the end of annular shoulder and lining respectively,, dilate convexity and also be not easy to produce the recovery distortion and make pipeline by pull-off even the pull-out force that pipeline receives is excessive; The resistance to plucking that has effectively improved linkage structure takes off ability; Simultaneously, dilate protruding difficult generation distortion and also make the nozzle position relative fixed, seal more reliable.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
Fig. 1 is the structural representation of the utility model.
Embodiment
Below will combine accompanying drawing that the utility model is elaborated, as shown in the figure: expanded joint access node structure in the spiral type steel-plastic composite pipe of present embodiment comprises coaxial thread bush that is set up in parallel 1 and cutting ferrule 2; Be with the swivel nut 3 of regulating both distances outside thread bush 1 and the cutting ferrule 2, axially support step 2a is set on the cylindrical of said cutting ferrule 2, the internal thread of said swivel nut 3 cooperates with the outside thread of thread bush 1; The axial tension step 3a of axially support step 2a is withstood in one end setting of swivel nut 3, can realize the adjustment of thread bush 1 and cutting ferrule 2 distances through rotary threaded sleeve 3, and said thread bush 1 all is provided with radially to projecting inward annular shoulder away from the end of cutting ferrule 2 and cutting ferrule 2 end away from thread bush 1; As shown in the figure, annular shoulder I 1a is set on the thread bush 1, the shoulder II 2a that goes in ring is set on the cutting ferrule 2; Waiting to dock pipeline 4 for two is stretched into by the annular shoulder place of thread bush 1 and cutting ferrule 2 respectively vertically; All radially outwards dilate out annular through the instrument of dilating on the dip section that two are waited to dock pipeline 4 and dilate protruding 4a, two dilate protruding 4a and hold out against two annular shoulders respectively, and two dilate to hold out against between the protruding 4a to be provided with and are placed in two and wait to dock the outer lining 5 of pipeline 4; The two ends of lining 5 are withstood two respectively and are dilated protruding 4a; This linkage structure dilates protruding under the squeezing action of annular shoulder, possibly the generation and recovers distortion and pipeline is thrown off when receiving big pull-out force, but because lining 5 has blocked the deformation direction that dilates protruding 4a; Therefore; The resistance to plucking that lining can improve linkage structure greatly takes off ability, simultaneously, because distortion is limited; Spacing between two butt tube mouths of pipe is relative fixed also, and the sealing effect when making its butt joint is better.
As the further improvement of technique scheme, be provided with two overlapped O-ring seals 6 between said two mouths of pipe of waiting to dock pipeline 4, mouth of pipe end face directly and the O-ring seal surface be close to; Good sealing effect; O-ring seal 6 is provided with the sleeve 6a that stretches into the corresponding mouth of pipe, and during butt joint, sleeve 6a stretches into and is difficult in the mouth of pipe dropping; And be convenient to the O-ring seal location, butt joint is fast convenient.
Further improvement as technique scheme; The internal diameter of said lining 5 equates with the external diameter of two pipelines 4 to be connected; Be that matching gap between lining 5 and two pipelines 4 to be connected is less, make lining 5 can withstand the root that dilates protruding 4a, prevent that it from recovering the best results of distortion.
Explanation is at last; Above embodiment is only unrestricted in order to the technological scheme of explanation the utility model; Although with reference to preferred embodiment the utility model is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technological scheme of the utility model; And not breaking away from the aim and the scope of the utility model technological scheme, it all should be encompassed in the middle of the claim scope of the utility model.

Claims (4)

1. expanded joint access node structure in the spiral type steel-plastic composite pipe; Comprise coaxial thread bush that is set up in parallel (1) and cutting ferrule (2); The outer swivel nut (3) of regulating both distances that is with of thread bush (1) and cutting ferrule (2); Said thread bush (1) all is provided with radially to projecting inward annular shoulder away from the end of cutting ferrule (2) and cutting ferrule (2) end away from thread bush (1); Two pipelines to be docked (4) are stretched into by the annular shoulder place of thread bush (1) and cutting ferrule (2) respectively; All radially outwards dilate out annular on the dip section of two pipelines to be docked (4) and dilate convexity (4a), two dilate convexity (4a) and hold out against two annular shoulders respectively, it is characterized in that: two dilate to hold out against between the convexity (4a) to be provided with and are placed in the outer lining (5) of two pipelines to be docked (4).
2. expanded joint access node structure in the spiral type steel-plastic composite pipe according to claim 1; It is characterized in that: axially support step (2a) is set on the cylindrical of said cutting ferrule (2); The internal thread of said swivel nut (3) cooperates with the outside thread of thread bush (1), and the axial tension step (3a) of axially support step (2a) is withstood in swivel nut (3) one end settings.
3. expanded joint access node structure in the spiral type steel-plastic composite pipe according to claim 1; It is characterized in that: be provided with two overlapped O-ring seals (6) between the mouth of pipe of said two pipelines to be docked (4), seal ring (6) is provided with the sleeve (6a) that stretches into the corresponding mouth of pipe.
4. according to expanded joint access node structure in claim 1, the 2 or 3 described spiral type steel-plastic composite pipes, it is characterized in that: the internal diameter of said lining (5) equates with the external diameter of two pipelines to be connected (4).
CN2011203084212U 2011-08-23 2011-08-23 Screw sleeve type internal expansion connecting structure for steel-plastic composite pipes Withdrawn - After Issue CN202252455U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011203084212U CN202252455U (en) 2011-08-23 2011-08-23 Screw sleeve type internal expansion connecting structure for steel-plastic composite pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011203084212U CN202252455U (en) 2011-08-23 2011-08-23 Screw sleeve type internal expansion connecting structure for steel-plastic composite pipes

Publications (1)

Publication Number Publication Date
CN202252455U true CN202252455U (en) 2012-05-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011203084212U Withdrawn - After Issue CN202252455U (en) 2011-08-23 2011-08-23 Screw sleeve type internal expansion connecting structure for steel-plastic composite pipes

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102313086A (en) * 2011-08-23 2012-01-11 重庆顾地塑胶电器有限公司 Inner expansion connecting structure for screw sleeve type steel and plastic composite pipe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102313086A (en) * 2011-08-23 2012-01-11 重庆顾地塑胶电器有限公司 Inner expansion connecting structure for screw sleeve type steel and plastic composite pipe

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C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20120530

Effective date of abandoning: 20130227

RGAV Abandon patent right to avoid regrant