CN105715879B - A kind of anti-loosing connecting structure of pipeline - Google Patents

A kind of anti-loosing connecting structure of pipeline Download PDF

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Publication number
CN105715879B
CN105715879B CN201610117312.XA CN201610117312A CN105715879B CN 105715879 B CN105715879 B CN 105715879B CN 201610117312 A CN201610117312 A CN 201610117312A CN 105715879 B CN105715879 B CN 105715879B
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CN
China
Prior art keywords
pipeline
interconnecting piece
fastening nut
fitting
locking
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Application number
CN201610117312.XA
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Chinese (zh)
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CN105715879A (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 present invention relates to a kind of connection structures of metal tube.A kind of anti-loosing connecting structure of pipeline, including pipeline and the fitting body being connected with pipeline, snap ring is equipped between pipeline and fitting body, snap ring includes tight lock part and interconnecting piece, interconnecting piece includes at least one end face and an inner ring surface, wherein the end face of interconnecting piece connects with the end face of fastening nut, and the inner ring surface of interconnecting piece connects with pipeline, and interconnecting piece is fixedly connected by fastening nut after compressing tight lock part with fastening nut.The present invention provides a kind of structure is simple, it can effectively prevent pipeline and be connected to and expand with heat and contract with cold, shake, being unclamped when drawing, stable connection does not need often to be overhauled, the anti-loosing connecting structure of the pipeline of good seal performance;It solves pipeline junction existing in the prior art easily to unclamp, seals not tight, the technical issues of pipeline is easy to happen leakage.

Description

A kind of anti-loosing connecting structure of pipeline

Technical field

The present invention relates to a kind of connection structures of metal tube more particularly to a kind of metallic conduit ring to press locking connection knot Structure.

Background technique

Pipeline is connected to used in our present lives quite extensively, and the structure for pipeline connection is also each certainly Color various kinds emerges one after another.Pipeline is connected, it is exactly the firmness connected that we are most concerned, if can be leaked.Now Pipe connecting structure in, much all be using be threadedly coupled, then sealing fastening.The benefit of threaded connection is that connection knot Structure is simple, facilitates assembly and disassembly and replacement, is suitable for most pipe connecting structure.

This connection structure can be by again and tight screw thread repairs leakage, extending and using the longevity in sealing surface part leakage Life.But the reparation space for repairing this leakage needs and tight screw thread, secretly buries connection and general dark deposited connection, bright load connect not Have this reparation space, need to reserve specific reparation space when installing and using, mounting means is restricted;Due to this Leakage caused by screw thread unclamps is difficult to predict again inconsistent, needs that irregular screw thread repairs all connections again and tightly Part, inspection and maintenance are costly and difficult to control;It is this that the repair mode of screw thread is not continuously effective and can not again and tightly Break duplicate, reach certain number and be just difficult to after the time so simply and tightly screw thread is repaired, need to change.This company Binding structure presses metal tube using screw thread and tight ring pressure snap ring, and the snap ring after connection, which has pressed, is recessed into metal tube surface, Disassembly cannot be unclamped again, need to be truncated sufficiently long metal tube and lay down this connecting pipe, install additional metal section and Additional straight-through connecting pipe reconnects pipeline, changes complexity.

Have in existing open file: Chinese patent: " a kind of pipe connecting structure (CN201242005Y) ", including even Fitting, and the tube body with connector mating, tube body are located on connector by the nut for being set in tube body periphery, the connection Port on part at least with two receiving tube bodies, protruding into has an annular groove, ring on the tube wall in connector port C-shaped snap ring is equipped in connected in star, the C-shaped snap ring side protruded from outside annular groove offsets with a sealing ring, sealing ring and company An annular slope on fitting inner wall constitutes a sealing surface.The structure is fastened using nut, although may be implemented to connect, It expands with heat and contract with cold, shake, will lead to screw thread in the pipelines use environment such as drawing and gradually unclamp general, by screw thread and tight ring pressure card The sealing surface of ring pressing metal tube just unclamps, and no longer undertakes sealing effect, pipeline internal medium can pass through the sealing of release Facial position leaks out.

Summary of the invention

The present invention provides a kind of structure is simple, can effectively prevent pipeline be connected to expand with heat and contract with cold, shake, drawing situations such as Lower release, stable connection do not need often to be overhauled, the anti-loosing connecting structure of the pipeline of good seal performance;It solves existing The technical issues of pipeline junction present in technology easily unclamps, and sealing is not tight, and pipeline is easy to happen leakage.

Above-mentioned technical problem of the invention is solved by following technical proposals: a kind of anti-loosing connecting structure of pipeline, Including pipeline and the fitting body being connected with pipeline, snap ring is equipped between the pipeline and fitting body, the snap ring includes lock Tight portion and interconnecting piece, the tight lock part are pressed between pipeline and fitting body by fastening nut, and tight lock part includes two pressures Conjunction face, one of stitching surface connect with pipeline, another stitching surface connects with fitting body, and the interconnecting piece includes at least One end face and an inner ring surface, wherein the end face of interconnecting piece connects with the end face of fastening nut, the inner ring surface and pipe of interconnecting piece Road connects, and interconnecting piece is fixedly connected by fastening nut after compressing tight lock part with fastening nut.The end of pipeline is inserted into fitting body Interior, the two clearance fit, fastening nut is socketed in outside fitting body and is threadedly coupled with fitting body.Then connect in pipeline and fitting body Gap in be inserted into snap ring, in the gap that the tight lock part of snap ring is inserted into pipeline and fitting body connects and snap ring and fastening nut Connect, tighten fastening nut at this time and compress the tight lock part of snap ring to form two stitching surfaces, the two stitching surfaces are by pressing Sealing is formed, so that it will not generate leakage.It is welded after tight lock part is pressed by fastening nut, then by interconnecting piece and fastening nut Connect, enhance locking to fastening nut using the axial friction of snap ring, it is therefore prevented that snap ring general rising-heat contracting-cold, vibration, It is axially loosened in the use environments such as drawing and radial rotary, the radial direction for also preventing the fastening nut integrally welded with snap ring is revolved Turn to unclamp, realizes the reliable sealing of the stitching surface of snap ring and pipeline;All implement screw thread and tight with fastening nut in its fitting body both ends Connection, can not radial rotary unclamp, realize the reliable sealing of the stitching surface of snap ring and fitting body.Snap ring is divided into two parts, Tight lock part is sealed than realizing in the relatively thin gap for being easily inserted into pipeline and fitting body, and the thicker convenience of interconnecting piece and fastening spiral shell Mother welds, and thin-wall part is not easy to weld and is easy to loosen.First with fastening nut compress tight lock part, then again by interconnecting piece with Fastening nut is fixed, that is, first with fastening nut shackle, the frictional force of snap ring is recycled to lock fastening spiral shell in turn Mother, the two condition each other locking of mutually promoting, and realize that sealing will not leak, and will not loosen, stability in use is good.

Tight lock part and interconnecting piece can be used as two components, can also be with a parts-moulding, preferably, the locking Portion and interconnecting piece are integrally formed, and the interconnecting piece is annular in shape, and the inner ring surface of interconnecting piece and the external peripheral surface gap of pipeline are matched It closes.Integrated molding facilitates installation and manufacture.Interconnecting piece and pipeline clearance fit facilitate location and installation.

Preferably, the end face of the interconnecting piece is cascaded surface, the end face of the fastening nut is also cascaded surface.Rank The joint face of scalariform, can be convenient positioning between the two, while connect more secured after welding, and axially be not easy to loosen, knot Structure is more stable.

Preferably, the end face of the interconnecting piece and the end face of fastening nut are welded and fixed.It is secured that mode is welded and fixed It spends, it is easy to connect.It can certainly be fixedly connected using remaining modes such as screws.

Preferably, the tight lock part is annular, the face that tight lock part connects with fitting body is arcwall face.Arcwall face insertion Into the gap between fitting body and pipeline, on the basis of compressing using fastening nut, it can be bonded fitting body well, formed Rubbing surface is pressed, sealing effect is improved.

Preferably, being externally provided with locking set in the fastening nut, the locking set includes positioning region and sticking department, Positioning region is socketed on fastening nut, and sticking department is locked in fitting body.Locking set, locking fastening are further added by outside fastening nut Positional relationship between nut and fitting body, further locks fastening nut, it is therefore prevented that fastening nut loosens, and protects Sealing effect is demonstrate,proved.

Preferably, the positioning region of the locking set is identical as the shape of fastening nut, between positioning region and fastening nut Gap cooperation, the sticking department includes the coupler body of a gib block and gib block end, offered in the fitting body to A few guide groove, gib block are plugged in one of guide groove, and coupler body is connected to the end face of fitting body.Fastening nut is general For hexagon or polygon, the shape for allowing locking to cover is identical as fastening nut, can be convenient lock sleeve positioning and assembly.It is connecing A guide groove can be just opened up on head body, allows the gib block of sticking department to be plugged in it, can also be opened up in fitting body more A guide groove, locking, which covers to be socketed on fastening nut in any angle, in this way can easily be plugged on fitting body outer circle weekly form In the guide groove in face.Guide groove is an open slot, after gib block is disposed within, hooks fitting body by the coupler body of its tail end End face, to be fixed the relative position of fastening nut and fitting body using locking set.

Preferably, the fastening nut external peripheral surface is cascaded surface, the front end for locking the positioning region of set is also rank Tread, the positioning region for locking set are connected on the cascaded surface of fastening nut, and the outer diameter of the interconnecting piece of snap ring is no more than locking set At minimum diameter.Facilitate locking to be inserted in fastening nut, and can be positioned by cascaded surface.The outer end face of snap ring with Minor diameter end face in the cascaded surface of fastening nut external peripheral surface is concordant, can guarantee snap ring locking in this way in fastening nut Afterwards, smoothly locking can be covered outside fastening nut.

Preferably, the fitting body includes the interconnecting piece of intermediate lug boss and lug boss two sides, interconnecting piece is equipped with External screw thread is connect with fastening nut, interconnecting piece internal diameter and outer diameter tube clearance fit, and the open end of interconnecting piece is equipped with chamfering, protrusion The cross-sectional shape in portion and the shape of fastening nut are identical.For interconnecting piece for connecting with fastening nut, lug boss can be convenient peace Dress locking set after, fastening nut is locked, the chamfering length of interconnecting piece port is advisable with 2.0mm~6.0mm, angle with 15 °~45 ° are advisable, and facilitate the sealing and anti-leakage of snap ring.

Therefore, a kind of anti-loosing connecting structure of pipeline of the invention has following advantages: utilizing fastening nut by snap ring pressure Tightly between pipeline and fitting body, forms stitching surface and realize sealing and anti-leakage;The frictional force and energy that the stitching surface being formed simultaneously generates Fastening nut is locked, so that it will not loosen, so that the sealing effect of snap ring is more firm, further in fastening nut The outer connection by locking set, fastening nut and fitting body is fixed, to further improve the stable connection of fastening nut Property, the sealing effect of stitching surface is also just further enhanced, in the use environments such as general rising-heat contracting-cold, vibration, drawing all It can prevent screw thread from unclamping, pipeline medium is avoided to leak.It is particularly suitable for thin-wall stainless steel and copper pipe etc. and has compressible spy Property metallic conduit, the bright load that can be used for such metallic conduit, which connects, secretly applies connection, secretly buries connection connects work with pipeline rehabilitation Journey.

Detailed description of the invention

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

Fig. 2 is the schematic diagram of fitting body of the invention.

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

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

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

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

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

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

Specific embodiment

Below with reference to the embodiments and with reference to the accompanying drawing the technical solution to invention is described in further detail.

Embodiment 1:

As shown in Figure 1, a kind of anti-loosing connecting structure of pipeline, the stainless steel pipes 1 including a thin-walled, pipeline 1 with connect Head body 4 is connected.Fitting body 4 is sealed with 1 joint of pipeline by snap ring 2, and snap ring 2 is locked by fastening nut 3.

As shown in Fig. 2, fitting body 4 includes the interconnecting piece 5 of intermediate 6 two sides of lug boss 6 and lug boss, interconnecting piece 5 is equipped with External screw thread, fitting body 4 are threadedly coupled with fastening nut 3, and 5 internal diameter of interconnecting piece and 1 crest clearance of pipeline cooperate, and interconnecting piece 5 is opened Mouth end is equipped with chamfering 14, and 14 length of chamfering is advisable with 2.0mm~6.0mm, and angle is advisable with 15 °~45 °, facilitates the close of snap ring 2 Seal leakproof.The cross-sectional shape of lug boss 6 is identical as the shape of fastening nut 3, is hexagon.

As shown in Figures 3 and 4, snap ring 2 includes integrally formed tight lock part 7 and interconnecting piece 8, and tight lock part 7 is annular, locking The face that portion connects with fitting body is arcwall face 15.Tight lock part 7 is pressed between pipeline 1 and fitting body 4 by fastening nut 3, is locked Tight portion 7 includes two stitching surfaces, and one of stitching surface Q connects with pipeline, another stitching surface P connects with fitting body.Even Socket part 8 is also annular, and the end face of interconnecting piece 8 and the end face of fastening nut 3 are welded and fixed, the end face with 3 interconnecting piece of fastening nut It is stepped.The inner ring surface of interconnecting piece 8 connects with pipeline, the inner ring surface of interconnecting piece 8 and the external peripheral surface clearance fit of pipeline.

In use, stainless steel pipes 1 are inserted into fitting body 4, it is then socketed upper snap ring 2, will be blocked by fastening nut 3 Ring 2 is pressed in the gap that pipeline 1 connects with fitting body 4, realizes that sealing prevents from leaking, after locking, then by the interconnecting piece of snap ring It is welded with fastening nut, locks fastening nut using the axial friction that stitching surface generates, so that fastening nut will not loosen, from And snap ring will not loosen, and realize dual fastening seal structure.

Embodiment 2:

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

As shown in Fig. 6 and 7 and 8, a locking set 9 is socketed on fastening nut 3.Locking set 9 includes integrally formed Positioning region 13 and sticking department, shape and 3 phase of fastening nut of positioning region 13 are all hexagon, and the front end of positioning region 13 forms one A cascaded surface 16 similarly forms corresponding cascaded surface 16 in the external peripheral surface of fastening nut.Fastening spiral shell is inserted in locking After on mother, by corresponding cascaded surface, locking set is positioned with fastening nut 3.The outer diameter and fastening spiral shell of the interconnecting piece 5 of snap ring Female 16 medium-small diameter of cascaded surface is identical, and locking set 9 is facilitated to be nested on fastening nut 3.Sticking department includes 12 He of gib block The coupler body 11 of 12 end of gib block, offers a guide groove 10 on the lug boss of fitting body, and gib block 12 is inserted into guiding In slot 10, then coupler body 11 is connected to 4 end face of fitting body, so that locking set 9 is fixed in fitting body.Due to 9 sets of locking set It connects on fastening nut 3, so that the relative position of fastening nut 3 and fitting body 4 be determined, further prevents fastening nut 3 loose It is de-, improve the stability and leakproofness of connection.Remaining is same as Example 1.

Claims (6)

1. a kind of anti-loosing connecting structure of pipeline, including pipeline and the fitting body being connected with pipeline, it is characterised in that: the pipe Snap ring is equipped between road and fitting body, the snap ring includes tight lock part and interconnecting piece, and the tight lock part is annular, tight lock part The face to connect with fitting body is arcwall face, and the tight lock part is pressed between pipeline and fitting body by fastening nut, connector Body further includes the interconnecting piece at both ends, and interconnecting piece is equipped with external screw thread and connect with fastening thread, and tight lock part includes two stitching surfaces, wherein One stitching surface connects with pipeline, another stitching surface connects with fitting body, and the interconnecting piece includes at least one end face With an inner ring surface, wherein the end face of interconnecting piece connects with the end face of fastening nut, and the inner ring surface of interconnecting piece connects with pipeline, tightly Gu interconnecting piece is fixedly connected by nut after compressing tight lock part with fastening nut, the end face of the interconnecting piece and the end of fastening nut Face is welded and fixed;
It is externally provided with locking set in the fastening nut, the locking set includes positioning region and sticking department, and positioning region is socketed in On fastening nut, sticking department is locked in fitting body.
2. a kind of anti-loosing connecting structure of pipeline according to claim 1, it is characterised in that: the tight lock part and connection Portion is integrally formed, and the interconnecting piece is annular in shape, the inner ring surface of interconnecting piece and the external peripheral surface clearance fit of pipeline.
3. a kind of anti-loosing connecting structure of pipeline according to claim 1 or 2, it is characterised in that: the interconnecting piece End face is cascaded surface, and the end face of the fastening nut is also cascaded surface.
4. a kind of anti-loosing connecting structure of pipeline according to claim 1, it is characterised in that: the positioning of the locking set Portion is identical as fastening nut shape, positioning region and fastening nut clearance fit, and the sticking department includes a gib block and leads To the coupler body of end, at least one guide groove is offered in the fitting body, gib block is plugged on one of guiding In slot, coupler body is connected to the end face of fitting body.
5. a kind of anti-loosing connecting structure of pipeline according to claim 1 or 4, it is characterised in that: the fastening nut External peripheral surface is cascaded surface, and the front end for locking the positioning region of set is also cascaded surface, and the positioning region for locking set is connected to fastening spiral shell On female female cascaded surface, at minimum diameter of the outer diameter no more than locking set of the interconnecting piece of snap ring.
6. a kind of anti-loosing connecting structure of pipeline according to claim 1 or 2 or 4, it is characterised in that: the fitting body Interconnecting piece including intermediate lug boss and lug boss two sides, interconnecting piece internal diameter and outer diameter tube clearance fit, interconnecting piece are opened Port is equipped with chamfering, and the cross-sectional shape of lug boss and the shape of fastening nut are identical.
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

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CN105715879A CN105715879A (en) 2016-06-29
CN105715879B true 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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