CN2739460Y

CN2739460Y - Forced pipe joint

Info

Publication number: CN2739460Y
Application number: CN 200420031918
Authority: CN
Inventors: 陈伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-06-04
Filing date: 2004-06-04
Publication date: 2005-11-09
Anticipated expiration: 2014-06-04

Abstract

The utility model relates to a forced pipe joint, comprising a joint body, an inner sleeve and locking nuts. The upper end surface of a T-shaped inner sleeve plane end is tightly leaned at the grooving bottom of a joint body, and the low end surface is provided with an end sealing ring. The inner circumference of a sleeve end of the inner sleeve is provided with a same diameter with the inner circumference of the joint body through hole, the external circumference is provided with a same diameter with the inner wall of a connection pipe, and a conical surface is arranged in the inner peripheral wall of the joint body grooving near the exterior. A shedding ferrule is arranged at the corresponding position of the conical surface, the inner diameter of a fixing end of the shedding ferrule is the same as the outer diameter of the connection pipe, and a conical surface is arranged at the external circumference of the shedding ferrule end. The conicity of the conical surface is the same as the conicity of the inner periphery conical surface in the joint body grooving, and an elastic sealing ring is arranged between the inner end of the joint body grooving and the contacted end surface of the shedding ferrule end of the shedding ferrule. The utility model has the advantages of reasonable distribution, easy manufacturing, easy use, low cost, increased corrosion resistance, good anti-leak performance and increased connection strength.

Description

A kind of powerful pipe joint

Technical field

The utility model relates to a kind of link that is used for pipeline, and is particularly a kind of corrosion-resistant, the anti-powerful pipe joint that leaks.

Background technique

Existing plastic-aluminum pipe, PEX (crosslinked polyethylene) pipe etc. have more and more substituted original galvanized pipe, and the pipe joint kind pattern that is mated is more.But on the market at present head be processed with the pipe of connecting thread, most popularly still adopt threaded copper pipe joint.This pipe joint quality is heavier, and work efficiency is lower, so it costs an arm and a leg, and limited by service condition, and cold season is easily by bursting by freezing, and is perishable in acid, the alkali environment.Expansion coefficient difference of the two is bigger when being connected with pipe because of it, so easily produce percolating water phenomenon.Do not have the pipe of connecting thread for plastic-aluminum tubing head, by employing and the joint body periphery of making one have the core pipe of O RunddichtringO and the plastic joint that C plastic retainer ring, locking nut are formed.This joint adopts the inner wall sealing of seal ring at connecting tube, makes to have to leave groove on the liner, causes its wall thickness to increase greatly, causes pipeline serious necking down in the joint, increases the circulating resistance of water.If seal ring on its core pipe periphery is too thick, and then loading and unloading are required great effort; If it is too thin, then poorly sealed.In addition, C plastic retainer ring is because of the cutting ferrule opening, so screw power when big when nut, easily makes the tubing compressive deformation; When nut screws power hour, relatively poor to the locking intensity of tubing, cause tubing to come off easily.The employing inner hole wall that also has is the body of truncated cone, cooperate to insert and to wait to take over the metal-cored pipe in the body and to be enclosed within its outer truncated cone cover of blooming, and utilizes the threaded sleeve connection body to be taken over that is tightened.The inner hole wall of this joint is truncated cone and the truncated cone that cooperates is with it bloomed cover, requirement on machining accuracy is higher, the constructing operation inconvenience.In addition, difficulty is made in the leakproof foundation ring of the cover bottom of blooming, and is fragile when suit is waited to take over body, influences sealing effect.The outside thread of aforementioned tube joint and attaching nut thereof all adopt common conical tooth to be meshed, and the screw-thread fit precision is not high, cause pulling capacity not enough, and body to be connected is come off.

The model utility content

The purpose of this utility model provides a kind of powerful pipe joint, and its structural distribution is reasonable, and is easy to manufacture, easy to use, compared with prior art, has low cost of manufacture, significantly improves corrosion-resistant, anti-water-leaking property energy, increases the advantage of join strength.

The purpose of this utility model is achieved in that this device comprises adapter body, neck bush and locking nut, its technological points is: the upper-end surface of T type neck bush planar ends is close to the tongue and groove bottom in adapter body, the lower end surface is provided with the end seal ring, the inner circumference of neck bush socket end inner circumference and adapter body through hole is with the footpath, its excircle and connecting tube inwall are with the footpath, the inner circle wall of adapter body tongue and groove is provided with conical surface near the outer end, with the corresponding position of its conical surface the opening cutting ferrule is set, the fixed cover end internal diameter of opening cutting ferrule is identical with the connecting tube external diameter, opening sleeve end excircle is provided with conical surface, the tapering of this conical surface is identical with the tapering of interior all conical surfaces of adapter body tongue and groove, flexible seal ring between the contacted end face of opening sleeve end of the inner of adapter body tongue and groove and opening cutting ferrule.

Overall structure is made in the upper-end surface of described T type neck bush planar ends and the tongue and groove of adapter body bottom.

The opening sleeve end of described opening cutting ferrule is provided with profile of tooth Ka Tai along week in it.

Connecting thread between described adapter body and the locking nut adopts stepped tooth to be meshed.

Because the utility model adopts the T type neck bush that is close in the tongue and groove bottom of adapter body, and by holding seal ring to connect the end of body, the body periphery is with the opening cutting ferrule of end face band elastic seal ring, when utilizing locking nut fixedly, the conical surface of its opening sleeve end matches with the conical surface of adapter body tongue and groove near the outer end, connect body, so can effectively overcome the above-mentioned defective of existence of the prior art.Because of the structural distribution of the adapter body tongue and groove of this device, T type neck bush, opening cutting ferrule etc. reasonable, easy to manufacture, easy to use, so compare with similar pipe joint of the prior art, particular structure makes it have low cost of manufacture, significantly improve corrosion-resistant, anti-water-leaking property energy, increase the advantage of join strength.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is the concrete structure schematic representation of a kind of straight-through type pipe joint of the present utility model.

Fig. 2 is a kind of stepped tooth structural representation of connecting thread among Fig. 1.

Fig. 3 is a kind of structural representation of the opening cutting ferrule among Fig. 1.

Fig. 4 is the sectional view of Fig. 3 along the A-A line.

Fig. 5 is a kind of Three way type pipe joint concrete structure schematic representation of the present utility model.

Fig. 6 is a kind of bending head type pipe joint concrete structure schematic representation of the present utility model

Specific implementation method

Describe concrete structure of the present utility model and working procedure in detail according to Fig. 1-6.This device comprises adapter body 2, opening cutting ferrule 4, T type neck bush 3, parts such as end seal ring 6, elastic seal ring 7 and locking nut 5.Wherein adapter body 2 can be structures such as straight-through type, Three way type or bending head type.The specification of above-mentioned each part, model should determine that manufactured materials is preferentially selected corrosion resistant rigid plastics for use according to actual usage requirement, and also available other engineering material is as corrosion-resistant metal materials or nonmetallic material etc.

Adapter body 2 is processed with the tongue and groove of socket connection pipe 1 with externally threaded joint.T type neck bush 3 is as independent part, and the upper-end surface of its planar ends is close to the tongue and groove bottom in adapter body 2, and the lower end surface is provided with end seal ring 6.For ease of connecting operation, also overall structure can be made in the upper-end surface of T type neck bush 3 planar ends and the tongue and groove bottom of adapter body 2, make T type neck bush 3 become the part of adapter body 2.The inner circumference of T type neck bush 3 socket ends, with the same footpath of the inner circumference of adapter body 2 through holes, the excircle of socket end and connecting tube 1 inwall are with the footpath.The inner circle wall of adapter body 2 tongue and grooves is provided with conical surface near the outer end, with the corresponding position of its conical surface opening cutting ferrule 4 is set, the fixed cover 8 end internal diameters of opening cutting ferrule 4 are identical with the external diameter of connecting tube 1, opening sleeve 9 end excircles are provided with conical surface, and the tapering of this conical surface is identical with the tapering of interior all conical surfaces of adapter body 2 tongue and grooves.Flexible seal ring 7 between the contacted end face of opening sleeve 9 ends of the inners of adapter body 2 tongue and grooves and opening cutting ferrule 4.Be the ability of chucking connecting tube 1 tube wall that improves opening cutting ferrule 4, can be at opening sleeve 9 ends of opening cutting ferrule, along profile of tooth card platform 10 is set in week in it.In addition, the connecting thread between adapter body 2 and the locking nut 5 adopts stepped tooth (as shown in Figure 2) to be meshed, and improves its join strength, prevents that pipe fitting from coming off.T type neck bush 3 plays the effect of support and connection pipe 1 tube wall, is positioned at the end seal ring 6 of tube end and the elastic seal ring 7 of pipe outer wall, can guarantee the sealability of pipe fitting.

During connection, earlier with locking nut 5, opening cutting ferrule 4, elastic seal ring 7 is inserted in connecting tube 1 successively, will hold seal ring 6 to be inserted in the root of neck bush 3 again, will have and hold the neck bush 3 of seal ring 6 to be inserted in connecting tube 1.When screwing locking nut 5, locking nut 5 promotes opening cutting ferrule 4 forward, and its opening end 9 is dwindled, and presses to tube wall, and the profile of tooth card platform 10 in the cutting ferrule gets deeply stuck in the pipe outer wall, makes its self-locking, strengthens the draft that it can bear.Simultaneously, compressing elastic seal ring 7 in the end of opening cutting ferrule 4 makes it form sealing between pipe outer wall and adapter body 2, and has also prevented the seepage of liquid between tube end and the T type neck bush 3 by end seal ring 6.

Utilize the utility model structure, can make the joint of multiple shape, as shown in the figure, only enumerated wherein several.

Claims

1, a kind of powerful pipe joint, comprise adapter body, neck bush and locking nut, it is characterized in that: the upper-end surface of T type neck bush planar ends is close to the tongue and groove bottom in adapter body, the lower end surface is provided with the end seal ring, the inner circumference of neck bush socket end inner circumference and adapter body through hole is with the footpath, its excircle and connecting tube inwall are with the footpath, the inner circle wall of adapter body tongue and groove is provided with conical surface near the outer end, with the corresponding position of its conical surface the opening cutting ferrule is set, the fixed cover end internal diameter of opening cutting ferrule is identical with the connecting tube external diameter, opening sleeve end excircle is provided with conical surface, the tapering of this conical surface is identical with the tapering of interior all conical surfaces of adapter body tongue and groove, flexible seal ring between the contacted end face of opening sleeve end of the inner of adapter body tongue and groove and opening cutting ferrule.

2, powerful pipe joint according to claim 1 is characterized in that: overall structure is made in the upper-end surface of described T type neck bush planar ends and the tongue and groove of adapter body bottom.

3, powerful pipe joint according to claim 1 is characterized in that: the opening sleeve end of described opening cutting ferrule is provided with profile of tooth Ka Tai along week in it.

4, powerful pipe joint according to claim 1 is characterized in that: the connecting thread between described adapter body and the locking nut, adopt stepped tooth to be meshed.