CN105715879A - Anti-looseness connection structure for pipeline - Google Patents

Anti-looseness connection structure for pipeline Download PDF

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Publication number
CN105715879A
CN105715879A CN201610117312.XA CN201610117312A CN105715879A CN 105715879 A CN105715879 A CN 105715879A CN 201610117312 A CN201610117312 A CN 201610117312A CN 105715879 A CN105715879 A CN 105715879A
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CN
China
Prior art keywords
pipeline
clamp nut
fittings
locking
loosing
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CN201610117312.XA
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Chinese (zh)
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CN105715879B (en
Inventor
黄明辉
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浙江天庆管业有限公司
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Priority to CN201610117312.XA priority Critical patent/CN105715879B/en
Publication of CN105715879A publication Critical patent/CN105715879A/en
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Publication of CN105715879B publication Critical patent/CN105715879B/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00Rigid pipes
    • F16L9/02Rigid pipes of metal
    • F16L9/04Reinforced pipes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00Joints with sleeve or socket
    • F16L21/02Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings

Abstract

The invention relates to a connection structure of metal pipe fittings. An anti-looseness connection structure for a pipeline comprises the pipeline and a connector body connected with the pipeline. A clamping ring is arranged between the pipeline and the connector body and comprises a locking part and a connecting part. The connecting part comprises at least one end face and an inner ring face. The end faces of the connecting part are connected with an end face of a fastening nut. The inner ring face of the connecting part is connected with the pipeline. The fastening nut tightly presses the locking part and then is fixedly connected with the connecting part. The anti-looseness connection structure for the pipeline is simple in structure, capable of effectively preventing pipeline connection from becoming loose under the conditions of thermal expansion and cold shrinkage, vibration, drawing and the like, stable in connection, free of frequent overhaul and good in sealing performance; and the technical problems that in the prior art, pipeline connection positions are prone to looseness, sealing is not tight and the pipeline is prone to leakage are solved.

Description

A kind of anti-loosing connecting structure of pipeline

Technical field

The present invention relates to the attachment structure of a kind of metal tube, particularly relate to a kind of metallic conduit ring pressure anti-loosing connecting structure.

Background technology

It is quite extensive that pipeline is connected in the life that we are present to use, and the structure certainly connected for pipeline is also miscellaneous emerging in an endless stream.Connecting for pipeline, we are most concerned is exactly the firmness connected, if seepage can occur.In present pipe connecting structure, it is all much that employing is threaded, then seals fastening.Threaded benefit is that attachment structure is simple, facilitates mounting or dismounting and replacing, it is adaptable to most pipe connecting structure.

This attachment structure sealing surface part leakage can by again and tight screw thread repair seepage, increase the service life.But repair this seepage to need and the reparation space of tight screw thread, secretly bury connect and general dark apply connect, bright load connects does not possess this reparation space, it is necessary to reserving when installing and using and specifically repair space, mounting means is restricted;Being difficult to predict and inconsistent owing to this screw thread unclamps the seepage caused, it is necessary to irregularly also tight screw thread repairs all of connector again, inspection and maintenance is costly and difficult to control;This again and the repair mode of tight screw thread be not continuously effective and can constantly repeat, reaching certain number of times and be just difficult to after the time so simply and tight screw thread repair, it is necessary to change.This attachment structure is to adopt screw thread tight ring pressure snap ring pressing metal tube, the pressing of snap ring after connection is recessed into metal tube surface, dismounting can not be unclamped again, need to block sufficiently long metal tube and lay down this connection pipe fitting, install extra metal section and extra straight-through connection pipe fitting to reconnect pipeline, change complexity.

Existing open file has: Chinese patent: " a kind of pipe connecting structure (CN201242005Y) ", including connector, and the body connected with connector, body is located on connector by the nut being set in body peripheral, described connector at least has two ports receiving body, stretch into and the tube wall in connector port has an annular groove, C shape snap ring it is equipped with in annular groove, the C shape snap ring side protruded from outside annular groove offsets with a sealing ring, and sealing ring constitutes a sealing surface with the annular slope on connector inwall.This structure utilizes nut to fasten, although can realize connecting, but general expanding with heat and contract with cold, shake, the pipeline such as drawing uses and can cause that screw thread unclamps gradually in environment, just unclamped by the sealing surface of screw thread tight ring pressure snap ring pressing metal tube, no longer undertaking sealing effectiveness, the sealing surface position that pipeline internal medium just can pass through to unclamp leaks out.

Summary of the invention

The invention provides a kind of simple in construction, can effectively prevent pipeline to be connected to and expand with heat and contract with cold, shake, unclamp when drawing, stable connection, it is not necessary to often overhaul, the anti-loosing connecting structure of the pipeline of good seal performance;Solving the pipeline junction existed in prior art easily to unclamp, seal not tight, pipeline is susceptible to the technical problem of seepage.

The present invention above-mentioned be technical problem is that and solved by following technical proposals: the anti-loosing connecting structure of a kind of pipeline, including pipeline and the fittings body that is connected with pipeline, it is provided with snap ring between described pipeline and fittings body, described snap ring includes tight lock part and connecting portion, described tight lock part is pressed between pipeline and fittings body by clamp nut, tight lock part includes two stitching surfaces, one of them stitching surface connects with pipeline, another one stitching surface connects with fittings body, described connecting portion includes at least one end face and an inner ring surface, wherein the end face of connecting portion connects with the end face of clamp nut, the inner ring surface of connecting portion connects with pipeline, clamp nut is connected fixing to connecting portion and clamp nut after compressing tight lock part.The end of pipeline is inserted in fittings body, both matched in clearance, and clamp nut is socketed in outside fittings body and threadeds with fittings body.Then the gap connected at pipeline and fittings body is inserted into snap ring, in the gap that the tight lock part of snap ring is inserted into pipeline and fittings body connects and snap ring connect with clamp nut, now tighten clamp nut and the tight lock part of snap ring is compressed two stitching surfaces of formation, the two stitching surface is to be formed through pressing to seal so that it will not produce to reveal.After tight lock part is pressed into by clamp nut, again connecting portion is welded with clamp nut, the axial friction utilizing snap ring strengthens the locking to clamp nut, prevent snap ring to use in environment in general rising-heat contracting-cold, vibrations, drawing etc. axially to get loose and radial rotary, also prevent the radial rotary of the clamp nut integrally welded with snap ring to unclamp, it is achieved the positive sealing of the stitching surface of snap ring and pipeline;Screw thread stressed joint are all implemented in its fittings body two ends with clamp nut, can not unclamp by radial rotary, it is achieved the positive sealing of the stitching surface of snap ring and fittings body.Snap ring is divided into two parts, and tight lock part realizes sealing than in the relatively thin gap being easily inserted into pipeline and fittings body, and the thicker convenience of connecting portion is welded with clamp nut, and thin-wall part is not easy welding and easily gets loose.First compress tight lock part with clamp nut, then again connecting portion and clamp nut are fixed, namely first with clamp nut shackle, the frictional force of recycling snap ring locks clamp nut in turn, both condition each other locking of mutually promoting, realize sealing will not seepage, and will not get loose, stability in use is good.

Tight lock part and connecting portion can as two parts, it is also possible to a parts-moulding, and as preferably, described tight lock part and connecting portion are one-body molded, described connecting portion in the form of a ring, the external peripheral surface matched in clearance of the inner ring surface of connecting portion and pipeline.One-body molded convenient installation and manufacture.Connecting portion and pipeline matched in clearance facilitate location and installation.

As preferably, the end face of described connecting portion is cascaded surface, and the end face of described clamp nut is also cascaded surface.Stair-stepping joint face, it is possible to convenient location between the two, connects more firm simultaneously, is axially not easy to get loose after welding, structure is more stable.

As preferably, the end face of described connecting portion and the end face of clamp nut are welded and fixed.It is welded and fixed mode firmness good, easy to connect.The fixing connection of all the other modes such as screw can certainly be adopted.

As preferably, described tight lock part is annular, and the face that tight lock part connects with fittings body is arcwall face.Arcwall face is inserted in the gap between fittings body and pipeline, on the basis utilizing clamp nut to compress, and fittings body of well fitting, form pressing rubbing surface, improve sealing effectiveness.

As preferably, being externally provided with locking set at described clamp nut, described locking set includes location division and sticking department, and location division is socketed on clamp nut, and sticking department is locked on fittings body.Outside clamp nut, it is further added by locking set, the position relationship between locking clamp nut and fittings body, further clamp nut has been locked, it is therefore prevented that getting loose of clamp nut, it is ensured that sealing effectiveness.

As preferably, the location division of described locking set is identical with the shape of clamp nut, location division and clamp nut matched in clearance, described sticking department includes the coupler body of a gib block and gib block end, described fittings body offers at least one gathering sill, gib block is plugged in one of them gathering sill, and coupler body is connected to the end face of fittings body.Clamp nut is generally hexagon or polygon, makes the shape that locking is overlapped identical with clamp nut, it is possible to facilitate lock sleeve location and assembling.Fittings body can just be offered a gathering sill, allow sticking department gib block grafting within it, can also offering multiple gathering sill on fittings body, so locking is enclosed within and arbitrarily angled be socketed on clamp nut and can be plugged on easily in the gathering sill of fittings body external peripheral surface.Gathering sill is an open slot, after gib block is disposed within, is hooked the end face of fittings body by the coupler body of its tail end, thus utilizing locking set to be fixed by the relative position of clamp nut Yu fittings body.

As preferably, described clamp nut external peripheral surface is cascaded surface, and the front end of the location division of locking set is also cascaded surface, and the location division of locking set is connected on the cascaded surface of clamp nut, and the external diameter of the connecting portion of snap ring is not more than the minimum diameter place of locking set.Convenient locking set is inserted in clamp nut, and can be positioned by cascaded surface.The outer face of snap ring is concordant with the minor diameter end face in the cascaded surface of clamp nut external peripheral surface, so can ensure that after clamp nut is by snap ring locking, it is possible to be enclosed within outside clamp nut by locking set smoothly.

As preferably, described fittings body includes lobe and the connecting portion of lobe both sides of centre, and connecting portion is provided with external screw thread and is connected with clamp nut, connecting portion internal diameter and outer diameter tube matched in clearance, the opening of connecting portion is provided with chamfering, and the shape of cross section of lobe is identical with the shape of clamp nut.Connecting portion is for connecting with clamp nut, and clamp nut is locked after can conveniently installing locking set by lobe, and the chamfering length of connecting portion port is advisable with 2.0mm~6.0mm, and angle is advisable with 15 °~45 °, facilitates the sealing and anti-leakage of snap ring.

Therefore, the anti-loosing connecting structure of a kind of pipeline of the present invention possesses following advantage: utilize clamp nut to be pressed between pipeline and fittings body by snap ring, forms stitching surface and realizes sealing and anti-leakage;The frictional force that the stitching surface concurrently formed produces can lock again clamp nut, it is made to get loose, so that the sealing effectiveness of snap ring is more firm, further in the connection overlapped by locking outside clamp nut, clamp nut and fittings body being fixed, thus further increasing the connective stability of clamp nut, also just further enhancing the sealing effectiveness of stitching surface, using in environment in general rising-heat contracting-cold, vibrations, drawing etc. to prevent screw thread from unclamping, it is to avoid pipeline medium seepage.Be particularly suited for thin-wall stainless steel and copper pipe etc. and possess the metallic conduit of compressive characteristics, can be used for the bright load of such metallic conduit connect, secretly apply connect, secretly bury connection and pipeline rehabilitation connect engineering.

Accompanying drawing explanation

Fig. 1 is the cross-sectional schematic of the anti-loosing connecting structure of a kind of pipeline of the present invention.

Fig. 2 is the schematic diagram of the fittings body of the present invention.

Fig. 3 is the schematic diagram of the snap ring of the present invention.

Fig. 4 is the enlarged diagram at A place in Fig. 1.

Fig. 5 is another cross-sectional schematic of the anti-loosing connecting structure of a kind of pipeline of the present invention.

Fig. 6 is the end view of the fittings body in Fig. 5.

Fig. 7 is the front view of the locking set in Fig. 5.

Fig. 8 is the left view of Fig. 7.

Detailed description of the invention

By the examples below, and in conjunction with accompanying drawing, the technical scheme of invention is described in further detail.

Embodiment 1:

As it is shown in figure 1, the anti-loosing connecting structure of a kind of pipeline, including the stainless steel pipes 1 of a thin-walled, pipeline 1 is connected with fittings body 4.Fittings body 4 is sealed by snap ring 2 with pipeline 1 joint, and snap ring 2 is locked by clamp nut 3.

As shown in Figure 2, fittings body 4 includes the lobe 6 of centre and the connecting portion 5 of lobe 6 both sides, connecting portion 5 is provided with external screw thread, fittings body 4 is threadeded with clamp nut 3, connecting portion 5 internal diameter coordinates with pipeline 1 crest clearance, and the opening of connecting portion 5 is provided with chamfering 14, and chamfering 14 length is advisable with 2.0mm~6.0mm, angle is advisable with 15 °~45 °, facilitates the sealing and anti-leakage of snap ring 2.The shape of cross section of lobe 6 is identical with the shape of clamp nut 3, is hexagon.

As shown in Figures 3 and 4, snap ring 2 includes integrated tight lock part 7 and connecting portion 8, and tight lock part 7 is annular, and the face that tight lock part connects with fittings body is arcwall face 15.Tight lock part 7 is pressed between pipeline 1 and fittings body 4 by clamp nut 3, and tight lock part 7 includes two stitching surfaces, and one of them stitching surface Q connects with pipeline, and another one stitching surface P connects with fittings body.The end face that connecting portion 8 is also annular, the end face of connecting portion 8 and clamp nut 3 is welded and fixed, stepped with the end face of clamp nut 3 connecting portion.The inner ring surface of connecting portion 8 connects with pipeline, the external peripheral surface matched in clearance of the inner ring surface of connecting portion 8 and pipeline.

During use, stainless steel pipes 1 is inserted in fittings body 4, then set connects snap ring 2, is pressed in the gap that pipeline 1 connects with fittings body 4 by clamp nut 3 by snap ring 2, it is achieved seals and prevents seepage, after locking, again the connecting portion of snap ring is welded with clamp nut, utilize the axial friction locking clamp nut that stitching surface produces so that clamp nut will not get loose, thus snap ring is without getting loose, it is achieved dual fastening seal structure.

Embodiment 2:

As it is shown in figure 5, the anti-loosing connecting structure of a kind of pipeline, including the copper pipeline 1 of a thin-walled, pipeline 1 is connected with fittings body 4.Fittings body 4 is sealed by snap ring 2 with pipeline 1 joint, and snap ring 2 is locked by clamp nut 3.

As shown in Fig. 6 and 7 and 8, clamp nut 3 is socketed with a locking set 9.Locking set 9 includes integrated location division 13 and sticking department, and the shape of location division 13 is all hexagon with clamp nut 3 phase, and the front end of location division 13 forms a cascaded surface 16, and what external peripheral surface at clamp nut was same forms corresponding cascaded surface 16.After locking set is inserted on clamp nut, by corresponding cascaded surface, locking set is positioned with clamp nut 3.The external diameter of the connecting portion 5 of snap ring is identical with clamp nut cascaded surface 16 medium-small diameter, and convenient locking set 9 is nested on clamp nut 3.Sticking department includes a gib block 12 and the coupler body 11 of gib block 12 end, the lobe of fittings body offers a gathering sill 10, gib block 12 is inserted in gathering sill 10, and then coupler body 11 is connected to fittings body 4 end face, is fixed on fittings body thus locking is overlapped 9.Owing to locking set 9 is socketed on clamp nut 3, thus the relative position by clamp nut 3 with fittings body 4 is determined, prevent clamp nut 3 from getting loose further, improve the stability and sealing that connect.All the other are identical with embodiment 1.

Claims (9)

1. the anti-loosing connecting structure of a pipeline, including pipeline and the fittings body that is connected with pipeline, it is characterized in that: between described pipeline and fittings body, be provided with snap ring, described snap ring includes tight lock part and connecting portion, described tight lock part is pressed between pipeline and fittings body by clamp nut, tight lock part includes two stitching surfaces, one of them stitching surface connects with pipeline, another one stitching surface connects with fittings body, described connecting portion includes at least one end face and an inner ring surface, wherein the end face of connecting portion connects with the end face of clamp nut, the inner ring surface of connecting portion connects with pipeline, clamp nut is connected fixing to connecting portion and clamp nut after compressing tight lock part.
2. the anti-loosing connecting structure of a kind of pipeline according to claim 1, it is characterised in that: described tight lock part and connecting portion are one-body molded, described connecting portion in the form of a ring, the external peripheral surface matched in clearance of the inner ring surface of connecting portion and pipeline.
3. the anti-loosing connecting structure of a kind of pipeline according to claim 1 and 2, it is characterised in that: the end face of described connecting portion is cascaded surface, and the end face of described clamp nut is also cascaded surface.
4. the anti-loosing connecting structure of a kind of pipeline according to claim 1 and 2, it is characterised in that: the end face of described connecting portion and the end face of clamp nut are welded and fixed.
5. the anti-loosing connecting structure of a kind of pipeline according to claim 1 and 2, it is characterised in that: described tight lock part is annular, and the face that tight lock part connects with fittings body is arcwall face.
6. the anti-loosing connecting structure of a kind of pipeline according to claim 1, it is characterised in that: being externally provided with locking set at described clamp nut, described locking set includes location division and sticking department, and location division is socketed on clamp nut, and sticking department is locked on fittings body.
7. the anti-loosing connecting structure of a kind of pipeline according to claim 6, it is characterized in that: the location division of described locking set is identical with the shape of clamp nut, location division and clamp nut matched in clearance, described sticking department includes the coupler body of a gib block and gib block end, described fittings body offers at least one gathering sill, gib block is plugged in one of them gathering sill, and coupler body is connected to the end face of fittings body.
8. the anti-loosing connecting structure of a kind of pipeline according to claim 6 or 7, it is characterized in that: described clamp nut external peripheral surface is cascaded surface, the front end of the location division of locking set is also cascaded surface, the location division of locking set is connected on the cascaded surface of clamp nut, and the external diameter of the connecting portion of snap ring is not more than the minimum diameter place of locking set.
9. the anti-loosing connecting structure of a kind of pipeline according to claim 1 or 2 or 6 or 7, it is characterized in that: described fittings body includes the lobe of centre and the connecting portion of lobe both sides, connecting portion is provided with external screw thread and is connected with clamp nut, connecting portion internal diameter and outer diameter tube matched in clearance, the opening of connecting portion is provided with chamfering, and the shape of cross section of lobe is identical with the shape of clamp nut.
CN201610117312.XA 2016-03-02 2016-03-02 A kind of anti-loosing connecting structure of pipeline CN105715879B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610117312.XA CN105715879B (en) 2016-03-02 2016-03-02 A kind of anti-loosing connecting structure of pipeline

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610117312.XA CN105715879B (en) 2016-03-02 2016-03-02 A kind of anti-loosing connecting structure of pipeline

Publications (2)

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CN105715879A true CN105715879A (en) 2016-06-29
CN105715879B CN105715879B (en) 2019-02-22

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203770880U (en) * 2014-01-17 2014-08-13 厦门理工学院 Single clamping sleeve type joint
CN204004917U (en) * 2014-07-30 2014-12-10 山东迅达化工集团有限公司 Pressure duct bindiny mechanism
CN204785158U (en) * 2015-07-08 2015-11-18 安徽江淮汽车股份有限公司 Cutting ferrule seal structure
CN205013906U (en) * 2015-10-08 2016-02-03 南京依柯卡特汽车催化器有限公司 Better straight tube attach fitting of leakproofness
CN205402002U (en) * 2016-03-02 2016-07-27 浙江天庆管业有限公司 Snap ring friction auto -lock connection structure is pressed to metal pipeline spiral ring

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203770880U (en) * 2014-01-17 2014-08-13 厦门理工学院 Single clamping sleeve type joint
CN204004917U (en) * 2014-07-30 2014-12-10 山东迅达化工集团有限公司 Pressure duct bindiny mechanism
CN204785158U (en) * 2015-07-08 2015-11-18 安徽江淮汽车股份有限公司 Cutting ferrule seal structure
CN205013906U (en) * 2015-10-08 2016-02-03 南京依柯卡特汽车催化器有限公司 Better straight tube attach fitting of leakproofness
CN205402002U (en) * 2016-03-02 2016-07-27 浙江天庆管业有限公司 Snap ring friction auto -lock connection structure is pressed to metal pipeline spiral ring

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