CN103759082A - Pipe connecting pipe fitting - Google Patents

Pipe connecting pipe fitting Download PDF

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Publication number
CN103759082A
CN103759082A CN201410041693.9A CN201410041693A CN103759082A CN 103759082 A CN103759082 A CN 103759082A CN 201410041693 A CN201410041693 A CN 201410041693A CN 103759082 A CN103759082 A CN 103759082A
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CN
China
Prior art keywords
cutting ferrule
taper hole
joint
nut
internal taper
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.)
Pending
Application number
CN201410041693.9A
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Chinese (zh)
Inventor
孙海潮
Original Assignee
孙海潮
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 孙海潮 filed Critical 孙海潮
Priority to CN201410041693.9A priority Critical patent/CN103759082A/en
Publication of CN103759082A publication Critical patent/CN103759082A/en
Pending legal-status Critical Current

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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
    • F16L19/00Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/02Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
    • F16L19/0212Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means
    • 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
    • F16L19/00Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/02Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
    • F16L19/0237Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member specially adapted for use with attachments, e.g. reduction units, T-pieces, bends or the like
    • 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
    • F16L19/00Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/02Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
    • F16L19/025Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the pipe ends having integral collars or flanges

Abstract

A pipe connecting pipe fitting comprises a nut, a joint, an external frustum of the joint and a horn mouth of a connecting pipe. The pipe connecting pipe fitting is characterized in that an inner taper hole is formed in the nut, a clamping sleeve used in cooperation is arranged in the inner taper hole of the nut, the clamping sleeve is provided with a hollow clamping sleeve hole, an inner taper hole of the clamping sleeve is formed in the bottom of the clamping sleeve hole, the inner taper hole of the clamping sleeve is composed of an inner cylindrical hole of the clamping sleeve and a horn groove of the inner taper hole of the clamping sleeve, the wall of the clamping sleeve hole and the external taper bevel of the clamping sleeve form a taper angle of the clamping sleeve, the external frustum of the joint extrudes the inner cylindrical hole of the clamping sleeve to achieve taper face sealing, the external frustum of the joint extrudes the horn mouth of the connecting pipe in the horn groove of the inner taper hole of the clamping sleeve to achieve horn groove sealing, and the inner taper hole of the nut extrudes the clamping sleeve so as to extrude the connecting pipe to achieve clamping sleeve sealing. The pipe connecting pipe fitting has the advantages that sealing connection is convenient and fast to operate, the sealing technological requirements are low, the sealing performance is high, and the pipe connecting pipe fitting can be used for connecting low-hardness thin-wall metal pipelines made of different materials and can be totally interchangeable with a connecting nut in the prior art.

Description

A kind of connecting pipe fitting for pipeline
Technical field
The invention belongs to industrial field, relate to a kind of connection pipe fitting that pipe is connected into pipeline, particularly relate to a kind of connection pipe fitting of Fluid Transport pipeline.
background technique
Being connected between tube and tube, pipe and other connecting pipe fitting for pipeline, is welded to connect, and is threaded, and flange connects, and bell mouth expanding connects, the methods such as Bite type fittings connection.Wherein bell mouth expanding connects, also claim enlarging to connect, flange connects, there is the technological requirement, link cost of connection lower, connecting means is convenient, can be used for the advantage of low hardness thin-wall metal pipelines, but it is lower to exist sealing load, the shortcoming that sealing reliability is poor, conventionally only can be applied in sealing load and connect lower than the pipeline of 8MPa.Bell mouth expanding connection pipe fitting comprises a nut, and the joint of an outer frustum of band, sometimes also with lining.The sealing principle that bell mouth expanding connects is that nut is packed into connecting tube port, then port is expanded into connecting tube horn mouth, by the internal thread on nut, be connected with the outside thread on joint, by nut internal taper hole, connecting tube horn mouth be squeezed on the outer frustum of joint and form and be tightly connected.The shortcoming that bell mouth expanding connects is that horn mouth is easily split by expansion, more coarse and the bearing capacity of horn mouth a little less than, when horn mouth and connecting tube junction are corroded with Fatigue Vibration, be prone to loosening, break and leak, prior art has the design that adopts lining to be protected, but lining is only to horn mouth effect, it between lining and connecting tube, is running fit, there is gap, communicate with the external world, ambient atmosphere, aqueous vapor, the erosion of sewage to horn mouth and connecting tube junction, all the time exist, year in and year out, when erosion has been arrived to a certain degree, will break because corrosion produces in horn mouth and connecting tube junction, become flexible and leak, it is special when to be dissimilar metal at joint with connecting tube be connected, exist even more serious electrochemical corrosion, corrosion failure is particularly evident, in in being connected of copper sleeve and aluminium connecting tubes, copper sleeve directly contacts with aluminium connecting tubes horn mouth and produces the electrochemical corrosion between copper aluminium, horn mouth sealing place will produce rupture and leakage very soon, therefore, bell mouth expanding Placement is to be not directly applied in the connection of different metal materials.In addition during pipe connection work often in certain vibrational state, when being accumulated to a certain degree, the vibrating fatigue that vibration brings can become flexible connection, reduce sealability, until thoroughly lose sealing, bell mouth expanding connects only in the generation sealing of horn mouth place, once horn mouth sealing produces, leak, just mean that connection pipe fitting loses sealing.Therefore, find that a kind of to connect sealing load higher, sealability is more reliable, corrosion protection, and vibrationproof, anti-loosening superior performance, can be directly used in and between dissimilar metal, connect and without the connection pipe fitting of electrochemical corrosion, has just become people to thirst for the technical barrier that solves always.
The outer frustum cone of joint of the prior art oblique angle is less than 90 degree, if be greater than 90 degree, joint has just become to have had the joint of internal taper hole, now, only need on joint internal taper hole, be socketed the transit joint that a two is outer frustum, just internal taper hole joint can be transitioned on the joint with outer frustum and implement the present invention.Nut of the present invention can be made into outer-hexagonal shape, and the instrument of being convenient to applies moment connection.
The present invention can, in joint and nut thread joint, between each sealing surface, apply metal anaerobic adhesive.Apply metal anaerobic adhesive, not only can play the defect of repairing sealing surface, lubricated being threaded and sealing surface, reduces to assemble moment, higher connection sealing energy is provided, after connection, also can provide high dismounting force moment, there is the loosening ability of more reliable anti-connection, apply metal anaerobic adhesive, the dismounting force moment increasing is more than the several times that are connected with joint screw thread of simple nut, non-dismountable under normal circumstances, thereby requires non-removable connecting tube connection occasion to become possibility for being applied in.The present invention again can be at joint and nut, and the connection part of nut and connecting tube puts heat-shrinkable T bush, is conducive to the long time stability of sealability, the nut in the present invention, joint, connecting tube, cutting ferrule adopts stainless steel, alloyed steel, Cuprum alloy, the metallic material such as aluminum alloy are made.Nut light cinclides also can seal shutoff and extraneous communicating by metal anaerobic adhesive with the gap of connecting tube, and meanwhile, metal anaerobic adhesive also can provide dismounting force moment to nut light cinclides.
Fluid in the present invention comprises liquids and gases, and the pipeline that the present invention can be used for all conveying liquid or gas connects above, comprises oil, chemical industry, controls gold, pharmacy, instrument and apparatus, electric power, air-conditioning, machinery, electronics, aviation, boats and ships, automobile making, all tube and tube in the industry such as hydraulic transmission manufacture, pipe is connected with the pipeline at other equipment interface places with valve and pipe.
Owing to having adopted technique scheme, the present invention has following main feature:
1, it is identical with the connection technological requirement of bell mouth expanding connection that the present invention has kept, and link cost is lower, connecting means is convenient, when can be used for the advantage of low hardness thin-wall metal pipelines, realize pressure-bearing and exceed more than 20MPa being tightly connected, sealability obtains several times and improves.
2, the present invention is multi-sealed, can, the in the situation that of flared channels seal failure, still can keep desirable sealing effect.Thereby the present invention can be in connection pipe fitting screw thread tensile strength scope, the spiral of implementing maximum moment connects, make to connect and needn't scruple the bell-mouthed problem of pressure break that causes of tightening, twist not tight problem and also just naturally do not exist, it is simpler and more direct that connection becomes, more reliable.
3, the present invention connects hermetic unit and extraneous thoroughly isolation, and to can be applicable to connecting tube be dissimilar metal with joint is connected and without electrochemical corrosion, thereby the application that replaces expensive connecting tube for low cost connecting tube becomes possibility.
4, the present invention is the multi-sealed connection around cutting ferrule, and cutting ferrule is soft state, is conducive to the sealing of crush seal face, thus to connection pipe fitting, cutting ferrule, bell mouth expanding required precision is lower, more easy during connection, and link cost declines.Connect the anti-loosening performance of antivibration more excellent.
5, the present invention and existing attaching nut have interchangeability completely, can not change existing joint structure, do not change under the prerequisite of existing bell mouth expanding connection technique, replace existing attaching nut.
Summary of the invention
Object of the present invention connects for above-mentioned bell mouth expanding the problem existing just, not changing under the prerequisite of frustum structure outside existing jointing, and the connecting pipe fitting for pipeline providing specially, thoroughly solved the problem that above-mentioned bell mouth expanding connecting means exists: connect sealing load lower, sealability poor reliability, can not corrosion protection, vibrationproof, anti-loosening performance are low, the problem not directly connecting for pipeline between dissimilar metal.
The object of the invention is to realize in the following manner:
1, a kind of connecting pipe fitting for pipeline, comprise nut, joint, the outer frustum of joint and connecting tube horn mouth, it is characterized in that: nut is provided with internal taper hole, in nut internal taper hole, be provided with matching used cutting ferrule, cutting ferrule is the cutting ferrule trepanning of hollow, cutting ferrule trepanning bottom is provided with cutting ferrule internal taper hole, cutting ferrule internal taper hole is comprised of cylindrical hole in cutting ferrule and cutting ferrule internal taper hole flared channels, cutting ferrule cover hole wall and composition cutting ferrule cone oblique angle, cutting ferrule outer cone inclined-plane, in the outer frustum extruding of joint cutting ferrule, cylindrical hole is realized conical surface seal, connecting tube horn mouth in the outer frustum extruding of joint cutting ferrule internal taper hole flared channels is realized flared channels sealing, thereby nut internal taper hole extruding cutting ferrule extruded joint pipe is realized cutting ferrule sealing.
2, cutting ferrule outer cone Dou face is provided with resiliently deformable groove.
3, cutting ferrule internal taper hole flared channels cone oblique angle is greater than the outer frustum cone of joint oblique angle.
4, cylinder bore dia is less than footpath at the bottom of the outer frustum of joint in cutting ferrule.
5, in cutting ferrule, cylindrical hole hole depth is greater than connecting tube wall thickness.
6, nut internal taper hole length and cutting ferrule length are all greater than 4mm.
7, nut internal taper hole length is more than or equal to cutting ferrule length.
8, cutting ferrule is soft state.
The present invention realizes conical surface seal by cylindrical hole in the outer frustum extruding of joint cutting ferrule; The connecting tube horn mouth in the outer frustum extruding of joint cutting ferrule internal taper hole flared channels realizes flared channels sealing and thereby nut internal taper hole extruding cutting ferrule extruded joint pipe is realized cutting ferrule sealing composition. thisthe conical surface seal of invention, the triple seal design of flared channels sealing and cutting ferrule sealing, is an effect each other, the multi-sealing structure of reciprocal causation.Cutting ferrule cover hole wall and composition cutting ferrule cone oblique angle, cutting ferrule outer cone inclined-plane refer to the cutting ferrule cover projection line of hole wall and the angle of cutting ferrule outer cone inclined-plane projection line, therefore, the cutting ferrule cone namely cone oblique angle on cutting ferrule outer cone inclined-plane, oblique angle, when implementing, cutting ferrule cone oblique angle refers to the cutting ferrule entrance angle forming into the cutting ferrule cone oblique angle sealing between nut internal taper hole and connecting tube for boring.Cone of the present invention oblique angle is corresponding taper hole, frustum, cutting ferrule, horn mouth, the angle of the center line of flared channels and its cone inclined-plane projection line, when connecting sealing, the direction that cutting ferrule cone oblique angle is extruded displacement is connected mobile opposite direction with nut, when cutting ferrule cone oblique angle is compressed in cutting ferrule sealing between nut internal taper hole and connecting tube and reaches certain sealing load, cutting ferrule cone oblique angle can be subject to huge resistance and stop displacement, now, outside joint under the squeezing action of frustum, realize conical surface seal and flared channels sealing, when the sealing of conical surface seal and flared channels reaches certain sealing load, nut continues to move to joint direction by jointing, cutting ferrule outer cone Dou face is continued to exert pressure, make cutting ferrule cone Dou angle continue to shrink and continuously extruded connecting tube, further improved cutting ferrule sealability.Original bell mouth expanding connects, coupling torque is too small, excessive, too quickly, horn mouth is made, horn mouth quality of materials, the factors such as wall thickness, all likely cause horn mouth break and can not seal, thereby bell mouth expanding connects stricter to the size requirements of coupling torque, increased connection difficulty, but multi-sealing structure of the present invention, coupling torque is not had to strict requirement, during connection, to the greatest extent available high-torque connects, when occurring that moment is excessive and make extreme case that horn mouth breaks, flared channels is sealed, sealing has been failure, but excessive moment, but can play further raising cutting ferrule sealing, the effect of conical surface seal, sealability can be further enhanced on the contrary.In nut internal taper hole, be provided with matching used cutting ferrule, refer to nut internal taper hole length, nut internal taper hole cone Dou angle and cutting ferrule length, coupling design is done at cutting ferrule cone Dou angle, so that in cutting ferrule when sealing, obtains desirable sealability, during the invention process, suggestion cutting ferrule cone Dou angle is slightly less than nut internal taper hole cone Dou angle 1 to 5 degree, and nut internal taper hole length is more than or equal to cutting ferrule length.Support the use and show, nut internal taper hole and cutting ferrule the two realizing in the object of the invention effect each other, indispensable.
Cutting ferrule internal taper hole is comprised of cylindrical hole in cutting ferrule and cutting ferrule internal taper hole flared channels.When in cutting ferrule, cylinder bore dia is less than outside joint at the bottom of frustum footpath, the outer frustum of joint just can be expressed to the interior cylindrical hole of cutting ferrule, realizes conical surface seal.In cutting ferrule, cylindrical hole hole depth will guarantee that first the outer frustum of joint pushes cylindrical hole nose end circular hole limit in cutting ferrule and implement conical surface seal, then when continuing conical surface seal, contact squeeze connecting tube horn mouth is implemented flared channels sealing, conventionally in card taking cover, cylindrical hole hole depth is greater than connecting tube wall thickness and can meets above-mentioned requirements, to be greater than 1.3 times of connecting tube wall thickness as good.In cutting ferrule, the shape of cylindrical hole also can be cutting ferrule inner circle taper hole, and the two does not have substantive difference, and the object of conical surface seal is implemented on the circular hole limit that all can reach circular hole in the outer frustum extruding of joint cutting ferrule.Cutting ferrule internal taper hole is provided with cutting ferrule internal taper hole flared channels, and connecting tube horn mouth is placed in cutting ferrule internal taper hole flared channels and produces flared channels sealing, and the sealing that the sealing of flared channels sealing connects than existing bell mouth expanding is higher, more reliable.During connection, connecting tube horn mouth size should be made according to the size of cutting ferrule internal taper hole flared channels, with horn mouth maximum radial diameter, is slightly less than cylinder bore dia in cutting ferrule, is placed in cutting ferrule internal taper hole flared channels completely for good.
Cutting ferrule outer cone Dou face is provided with resiliently deformable groove, when nut is connected with joint, nut internal taper hole and cutting ferrule outer cone Dou face extruding laminating, resiliently deformable groove forms space, when flared channels seals, the cutting ferrule of gap is subject to squeezing thrust outwardly convex, produce resiliently deformable, the elastic energy that resiliently deformable is accumulated will absorb the vibration of connecting tube effectively, improve the vibration resistance of sealing, the rising-heat contracting-cold that temperature variation is caused, play sealing compensation effect, particularly at joint, cutting ferrule, nut, when connecting tube is the connection application of different materials metal, compensating action is larger, guaranteed the reliability of sealing.The designing shape of resiliently deformable groove can be triangle, arc, also can be other shapes, as long as meet while connecting sealing, in the cutting ferrule outside of cutting ferrule internal taper hole flared channels and cutting ferrule cover hole wall junction, form the space groove between cutting ferrule cone Dou face and nut internal taper hole.The maximum depth 0.2 to 0.6mm of getting groove during enforcement, width 2 to 4mm is good.
During connecting tube bell mouth expanding, horn mouth and the sclerosis of connecting tube junction stress deformation are minimum, compared with other horn mouth positions, be difficult to occur deformation defect, therefore, by cutting ferrule internal taper hole flared channels cone oblique angle design, for being greater than the outer frustum cone of joint oblique angle, during flared channels sealing, sealing load is just concentrated in horn mouth and connecting tube junction, sealing surface face width narrows, better tightness.Meanwhile, sealing load concentrates on horn mouth and connecting tube junction, and the elastic energy that the resiliently deformable groove on corresponding cutting ferrule outer cone Dou face obtains is larger, the vibration resistance of sealing, and sealing compensation ability is stronger.During enforcement, advise that cutting ferrule internal taper hole flared channels cone oblique angle is greater than the outer frustum cone of joint oblique angle 1 to 15 degree.
Flared channels sealing of the present invention, because being extruded, connecting tube horn mouth is fixed between the outer frustum of joint and cutting ferrule internal taper hole flared channels, connecting tube just there will not be drawing loosening, the phenomenon getting loose, the outer frustum of joint is delivered to resiliently deformable groove to the bell-mouthed extruding force of connecting tube by cutting ferrule internal taper hole flared channels, make cutting ferrule produce resiliently deformable, thereby bring shock-absorbing, the functions such as sealing compensation, during cutting ferrule sealing, connecting tube is radially extruded contraction, the possibility that connecting tube has the generation of being crushed to leak, particularly when connecting low hardness thin-wall metal connecting pipe, connecting tube rigidity is lower, the easier radial compression distortion of connecting tube, but after horn mouth is extruded and fixes, horn mouth and cutting ferrule sealing station are nearer, connecting tube tube wall to cutting ferrule sealing place plays certain supporting effect, eliminated the possibility that connecting tube has the generation of being crushed to leak, reach the present invention and can be applicable to the object on low hardness thin metallic tubd.Therefore, seal action is not only played in flared channels sealing, also plays fixing connecting tube, resiliently deformable cutting ferrule, the effect of support and connection tube wall.
By nut internal taper hole Design of length for being more than or equal to cutting ferrule length, when cutting ferrule cone Dou angle is slightly less than nut internal taper hole cone Dou angle, cutting ferrule will be squeezed in nut internal taper hole completely, and cutting ferrule just can be adequately compressed sealing, and sealing of the present invention could obtain best sealability.Nut internal taper hole length and cutting ferrule length are all greater than 4mm, and in the time of just guaranteeing nut internal taper hole extruding cutting ferrule outer cone Dou face, the sealing surface length of cutting ferrule sealing reaches seal request.
Cutting ferrule of the present invention is squeezed in nut internal taper hole completely, by conical surface seal, and flared channels sealing, the structural feature that cutting ferrule sealing is surrounded has determined that cutting ferrule can be soft state.Cutting ferrule is that soft state refers to the condition of heat treatment after cutting ferrule shapes.Metal ferrule is designed to soft state, when being connected with low hardness thin-wall metal pipelines, easier compressive strain when cutting ferrule is squeezed, just each sealing surface easily obtains sealing reliably.Meanwhile, to cutting ferrule precision, nut precision, connecting tube precision, horn mouth technological requirement reduces, and cost of production declines, and connects technological requirement and becomes convenient.
Sealing technique requires the outer frustum center line of horn mouth center line and joint to overlap as far as possible, otherwise easily causes leakage, and particularly, in the connection sealing of heavy caliber connecting tube, the requirement that center line is overlapped is higher.Cutting ferrule sealing in the present invention, when cutting ferrule seals connecting tube, connecting tube center line and joint center line are played to the effect of adjusting correction, thereby reach the adjustment correction to horn mouth center line and the outer frustum center line of joint, therefore, the effect of adjusting correction horn mouth center line and the outer frustum center line of joint is also played in cutting ferrule sealing in the present invention, guarantees the sealability of flared channels sealing.
In flared channels when sealing,, the cutting ferrule internal taper hole flared channels of horn mouth and connecting tube junction cutting ferrule one side is to push completely closely fitting bell-mouthedly, and now cutting ferrule plays one and sets off protective action, has improved horn mouth and connecting tube junction bearing capacity.During cutting ferrule sealing, nut internal taper hole, cutting ferrule, gap between connecting tube three is extruded the cutting ferrule cone oblique angle sealing of distortion, has completely cut off horn mouth and connecting tube junction and extraneous communicating, and the necessary condition that electrochemical corrosion occurs is will be in wet air, among water, completely cut off horn mouth and connecting tube junction and extraneous communicating, electrochemical corrosion lose necessary condition, also just thoroughly eliminated and produced the problem of electrochemical corrosion when joint is connected with dissimilar metal connecting tube.
Nut is provided with internal taper hole, it is cutting ferrule sealing, that specialized designs is on nut, during sealing without the outer frustum of existing joint is made knots to the change on structure, thereby reach under the prerequisite that does not change existing joint structure, implement object of the present invention, make the attaching nut of attaching nut of the present invention and prior art there is interchangeability completely.
Accompanying drawing explanation
Figure of description 1 is linkage structure schematic diagram of the present invention.
Figure of description 2 is nut structure schematic diagram of the present invention.
Figure of description 3 is ferrule structure schematic diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
In accompanying drawing, 1 is joint, and 2 for being threaded, and 3 is nut, 4 is footpath at the bottom of the outer frustum of joint, and 5 be joint frustum outward, and 6 is conical surface seal, 7 is connecting tube horn mouth, and 8 is cutting ferrule, and 9 is connecting tube, 10 is nut internal taper hole, and 11 is nut internal taper hole cone oblique angle, and 12 is nut light cinclides, cylindrical hole in 13 cutting ferrules, 14 cutting ferrule internal taper hole flared channels, 15 is cutting ferrule resiliently deformable groove, 16 is cutting ferrule outer cone Dou face, and 17 is cutting ferrule cone oblique angle, and 18 is cutting ferrule cover hole wall.
Embodiment: Fig. 1 is linkage structure schematic diagram of the present invention.Connection pipe fitting of the present invention comprises nut 3 and cutting ferrule 8, during connection, first by nut 3, cutting ferrule 8 is sleeved on connecting tube 9 successively, cutting ferrule cone oblique angle 17 is towards nut internal taper hole cone Dou angle 11, connecting tube 9 pipe ends expand connecting tube horn mouth 7, gently draw connecting tube 9, cutting ferrule 8 is drawn in nut internal taper hole 10 by connecting tube horn mouth 7, left rotation and right rotation nut 3 for several times, until that feel is drawn is motionless, make connecting tube horn mouth 7 and cutting ferrule internal taper hole flared channels 14, the outer wall of cutting ferrule cover hole wall 18 and connecting tube 9, cutting ferrule outer cone inclined-plane 16 smoothly fits together each other as much as possible with nut internal taper hole 10, then nut 3 being threaded connection to 2 is connected with joint 1, until feel is stubborn motionless, then by instrument, nut 3 is applied to moment, feel moment continues spiral 1 while strengthening suddenly till 3 circles.Now, cutting ferrule cone oblique angle 17 is bored and between nut internal taper hole 10 and connecting tube 9, is realized cutting ferrule and seal, be extruded the connecting tube horn mouth 7 being fixed between the outer frustum 5 of joint and cutting ferrule internal taper hole flared channels 14 and realize flared channels sealing, in cutting ferrule, the outer frustum 5 of the nose end circular hole limit of cylindrical hole 13 and joint is realized conical surface seal 6, and connection completes.At the bottom of the outer frustum of joint, footpath 4 is the outer frustum bottom maximum diameter of joint 1, when 13 diameters of cylindrical hole in cutting ferrule are less than outside joint footpath 4 at the bottom of frustum, when in cutting ferrule, cylindrical hole 13 meets certain depth, in cutting ferrule, the nose end circular hole limit of cylindrical hole 13 will be pushed with the outer frustum 5 of joint, realize conical surface seal 6, along with the continuous extruding of conical surface seal 6, the outer frustum 5 of joint advances towards cutting ferrule internal taper hole flared channels 14 directions, conflict and push the connecting tube horn mouth 7 in cutting ferrule internal taper hole flared channels 14, realize flared channels sealing, cutting ferrule resiliently deformable groove 15 is subject to the thrust from flared channels sealing, there is resiliently deformable, meanwhile, along with 2 the continuous helical of being threaded of nut 3 and joint 1 is connected, nut internal taper hole 10 constantly increases the compression extruding to connecting tube 9 by cutting ferrule 8, realize more firm cutting ferrule sealing.

Claims (8)

1. a connecting pipe fitting for pipeline, comprise nut, joint, the outer frustum of joint and connecting tube horn mouth, it is characterized in that: nut is provided with internal taper hole, in nut internal taper hole, be provided with matching used cutting ferrule, cutting ferrule is the cutting ferrule trepanning of hollow, cutting ferrule trepanning bottom is provided with cutting ferrule internal taper hole, cutting ferrule internal taper hole is comprised of cylindrical hole in cutting ferrule and cutting ferrule internal taper hole flared channels, cutting ferrule cover hole wall and composition cutting ferrule cone oblique angle, cutting ferrule outer cone inclined-plane, in the outer frustum extruding of joint cutting ferrule, cylindrical hole is realized conical surface seal, connecting tube horn mouth in the outer frustum extruding of joint cutting ferrule internal taper hole flared channels is realized flared channels sealing, thereby nut internal taper hole extruding cutting ferrule extruded joint pipe is realized cutting ferrule sealing.
2. a kind of connecting pipe fitting for pipeline according to claim 1, is characterized in that: cutting ferrule outer cone Dou face is provided with resiliently deformable groove.
3. a kind of connecting pipe fitting for pipeline according to claim 1, is characterized in that: cutting ferrule internal taper hole flared channels cone oblique angle is greater than the outer frustum cone of joint oblique angle.
4. a kind of connecting pipe fitting for pipeline according to claim 1, is characterized in that: cylinder bore dia is less than footpath at the bottom of the outer frustum of joint in cutting ferrule.
5. a kind of connecting pipe fitting for pipeline according to claim 1, is characterized in that: in cutting ferrule, cylindrical hole hole depth is greater than connecting tube wall thickness.
6. a kind of connecting pipe fitting for pipeline according to claim 1, is characterized in that: nut internal taper hole length and cutting ferrule length are all greater than 4mm, and nut internal taper hole length is more than or equal to cutting ferrule length.
7. a kind of connecting pipe fitting for pipeline according to claim 1, is characterized in that: nut internal taper hole length is more than or equal to cutting ferrule length.
8. a kind of connecting pipe fitting for pipeline according to claim 1, is characterized in that: cutting ferrule is soft state.
CN201410041693.9A 2014-01-28 2014-01-28 Pipe connecting pipe fitting Pending CN103759082A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410041693.9A CN103759082A (en) 2014-01-28 2014-01-28 Pipe connecting pipe fitting

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Application Number Priority Date Filing Date Title
CN201410041693.9A CN103759082A (en) 2014-01-28 2014-01-28 Pipe connecting pipe fitting

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015120609A1 (en) * 2014-02-13 2015-08-20 孙海潮 Pipeline connection pipe fitting
WO2016065649A1 (en) * 2014-11-01 2016-05-06 孙海潮 Pipe fitting for pipeline connection
WO2016065648A1 (en) * 2014-11-01 2016-05-06 孙海潮 Pipe fitting for pipeline connection
WO2016065651A1 (en) * 2014-11-01 2016-05-06 孙海潮 Pipe fitting for pipeline connection
CN106641501A (en) * 2016-11-28 2017-05-10 无锡金顶石油管材配件制造有限公司 Petroleum pipe connection hoop

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Publication number Priority date Publication date Assignee Title
GB492125A (en) * 1937-09-18 1938-09-15 James H Lamont & Company Ltd Improvements in pipe couplings
FR2269020A1 (en) * 1974-04-27 1975-11-21 Bosch Gmbh Robert
CN2148872Y (en) * 1993-02-11 1993-12-08 谷伟 Fast connecting device for pipe
JP2002195467A (en) * 2000-12-26 2002-07-10 Usui Internatl Ind Co Ltd Connecting structure of resin coated metal pipe
CN201672183U (en) * 2010-05-14 2010-12-15 徐盛根 Pure aluminium connecting line for air conditioner

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB492125A (en) * 1937-09-18 1938-09-15 James H Lamont & Company Ltd Improvements in pipe couplings
FR2269020A1 (en) * 1974-04-27 1975-11-21 Bosch Gmbh Robert
CN2148872Y (en) * 1993-02-11 1993-12-08 谷伟 Fast connecting device for pipe
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015120609A1 (en) * 2014-02-13 2015-08-20 孙海潮 Pipeline connection pipe fitting
WO2016065649A1 (en) * 2014-11-01 2016-05-06 孙海潮 Pipe fitting for pipeline connection
WO2016065648A1 (en) * 2014-11-01 2016-05-06 孙海潮 Pipe fitting for pipeline connection
WO2016065651A1 (en) * 2014-11-01 2016-05-06 孙海潮 Pipe fitting for pipeline connection
CN106641501A (en) * 2016-11-28 2017-05-10 无锡金顶石油管材配件制造有限公司 Petroleum pipe connection hoop

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