CN101113798B

CN101113798B - Squeezing connecting pipe joiner

Info

Publication number: CN101113798B
Application number: CN2007100074607A
Authority: CN
Inventors: 徐长祥
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-08-15
Filing date: 2002-08-15
Publication date: 2010-08-25
Anticipated expiration: 2022-08-15
Also published as: CN101113798A

Abstract

Extrusion connection pipe fittings consist of a connecting body, a sealing hoop, a holding hoop and an extrusion hoop driven nut. The holding hoop is an opening spring bended by a circle of round section steel wire, with the help of the function of a wedge bar of the sealing hoop, the fixing requirement of the holding hoop is rather strong relative to the sealing for the sealing hoop, and is rather weak relative to the fixing of the holding hoop, thus effectively settling the main contradict that affects the extrusion and connecting function, i.e., the contradict that the extrusion connectingfor a double-hoop pipe requires that the holding hoop must be 'not only strong but also weak', to ensure that the sealing of the pipe extrusion connecting is more effective, the fixing of the pipe extrusion connecting is more reliable, and the detachability of the pipe extrusion connecting is better.

Description

Squeezing connecting pipe joiner

Technical field

This patent belongs to mechanical engineering field, relates to the squeezing connecting pipe joiner of a kind of fluid dynamic transmission and medium transport pipeline.

Background technique

Tube and tube, pipe are connected with other device, and methods such as welding, screw thread, flange, extruding, enlarging are arranged.Pipe extruding connects, and is by hoop or cutting ferrule being squeezed the connection of the fluid transmission pipe of realizing between by connecting leg and link thereof, and the flared type pipe connects and grows up relatively the preceding, therefore, cries no flared tube connection in one's early years again.The pipe extruding connects, and both need not to manufacture screw thread or horn mouth at tube head, also need not welding or sealing medium, link can be fully prefabricated in professional factory, and connection is rapidly convenient, and quality of connection ensures fully, can bear high pressure-temperature, be the needs and the selection of senior pipeline.

Squeezing connecting pipe joiner has two kinds of single hooping and dual hoopings.CNS GB3733 to GB3765 Bite type fittings belongs to the single hooping squeezing connecting pipe joiner, and what the U.S.'s 6131963 series of patents disclosed is the dual hooping squeezing connecting pipe joiner.To be the inner conical surface that squeezes the hoop drive nut by the male cone (strobilus masculinus) that squeezes the hoop afterbody order about the squeezing connecting pipe joiner of single hooping squeezes hoop head outer cone and go into the connecting body inner cone, under the mating reaction of interior male cone (strobilus masculinus), squeeze hoop two and dwindle the middle part protuberance, press to connected tube-surface simultaneously squeezing hoop two, mainly finish being tightly connected, finish being fastenedly connected by afterbody by head.The squeezing connecting pipe joiner of dual hooping is to squeeze hoop after increasing by one between the drive nut of single hooping and the crowded hoop, hoop is squeezed under its cone match effect in front and back, the preceding afterbody inner cone that squeezes hoop makes the back squeeze the head that binds round and tightens at connected tube-surface, mainly finish being fastenedly connected to pipe, the head that squeezes hoop before the inner conical surface of connecting body makes tightens at connected tube-surface, mainly finishes being tightly connected to pipe.Like this, the preceding crowded hoop of dual hooping can be sealing hoop, and the crowded hoop in back can be named clasps hoop.No matter single hooping or dual hooping, the core of structure is to concentrate on a little squeezing the extruding force of hoop to pipe, improves and squeezes the pressure of hoop to pipe, reaches with extruding and realizes the pipe purpose of connecting.According to lever principle, for single hooping,, help more then improving that to squeeze the hoop head be sealing to the pressure of pipe if it is good more or afterbody is more little to the pressure of pipe to squeeze the rigidity of hoop afterbody, be tightness but be unfavorable for squeezing the hoop afterbody to clasping of pipe, vice versa; Equally, for dual hooping, if it is good more or more little to the pressure of pipe to clasp the rigidity of hoop, then helping improving the sealing hoop head more is sealing to the pressure of pipe, is tightness but be unfavorable for clasping hoop to clasping of pipe, and vice versa.That is to say that sealing that pipe extruding connects and tightness all are contradiction to the structural requirement of the crowded hoop afterbody of single hooping with to the structural requirement of clasping hoop of dual hooping.So, the performance major decision that pipe extruding connects to this to unity of contradictions or balance.

The U.S. 6131963 series of patents propose a kind of strong weak back crowded hoop (clasping hoop) that includes the simulation hinge---squeeze thereafter that hoop is just eager to do well in everything does not kill by connecting leg to not tightening up before preceding crowded hoop (sealing hoop) realization is tightly connected, thereafter hoop middle part is just in time weak makes hinge and moves the center when preceding crowded hoop is realized being tightly connected, making the back squeeze the hoop head inwardly rotates and radially clamp-ons by the connecting leg surface around it---so as to realizing, rather than squeeze hoop before continuing fully to promote forward to being fastenedly connected of pipe---and so as to realizing to worsening the restriction of overdriving of sealing.Because it is not strong a little less than not that the working foundation of back crowded hoop of simulation hinge is arranged, be that it can not satisfy the required fully strong anti-requirement of shrinking of sealing, can not satisfy fastening required fully weak anti-requirement of shrinking, therefore, the sealing that it provided and fastening can only be at most neither better nor worse.Obviously, the direct result of " by force weak " design is, the hinge dynamic deformation of back hoop and too big to the support bulging deformation of preceding hoop tail, the power consume is too many, therefore, what cause at first is the connection sealing of inefficiency and fastening again, and then the switching performance that is only " neither better nor worse " that causes.

In addition, no matter be single hooping or dual hooping, the crowded hoop of prior art, even tighten number of turns normal mounting in accordance with regulations, the crowded hoop after all may connecting tensioning hardly nondestructively disassembles from pipe, useless often hoop promptly equals useless pipe.

Summary of the invention

The technical problem that this patent will solve is to improve existing dual hooping squeezing connecting pipe joiner, and the sealing that the pipe extruding is connect is more effective, makes pipe push connect fastening more reliable, and the dismoutability that the pipe extruding is connected is better.

The scheme of this patent technical solution problem is a kind of squeezing connecting pipe joiner, as depicted in figs. 1 and 2, by connecting body (1), sealing hoop (2), clasp hoop (3) and squeeze hoop drive nut (4) composition, at first successively with drive nut, clasping hoop is sleeved on the pipe of preparing to be connected with sealing hoop, secondly cover is installed drive nut, the tube head of clasping hoop and sealing hoop inserts in the connecting body, then drive nut is tightened on the outside thread of connecting body, drive nut just orders about to clasp and binds round sealing hoop afterbody inner cone, clasping hoop orders about sealing hoop again and causes its head outer cone and go into the connecting body inner cone, finally make the sealing hoop head be stretched in connecting body and by between the connecting leg surface, finish being tightly connected pipe and body; It is characterized in that described to clasp hoop be that elastic opening is clasped hoop, elastic opening packing ring, but preferably bend the C type packing ring that forms with the circular section steel wire; The afterbody of described elastic opening packing ring is subjected to driving structure consistent with the driving structure of the nut that drives it, and the head driving structure is that sphere or the conical surface are so that drive in sealing hoop afterbody inner cone; When drive nut was tightened, described elastic opening was clasped constriction tightly on connected pipe, finishes being fastenedly connected pipe, supportting simultaneously the sealing hoop afterbody again, reduce the lifting surface area that contacts of sealing hoop and pipe, increase head systolic pressure intensity, enhancing being tightly connected pipe; After drive nut withdrawed from, elasticity was clasped hoop and is restored to the original state, and unclamped the pipe held tightly to allow sealing hoop can move the dismounting that favourable butt joint connects backward on pipe.

Owing to clasp hoop opening and anti-contraction intensity is low, therefore, drive nut almost all is converted to the power of clasping to pipe to the radial compression force of clasping hoop, has improved the fastening efficient that connects.Since clasp the hoop body strength of materials very high and clasp hoop with the contact arc area of pipe greater than the wedge angle area of contact of sealing hoop head with pipe, therefore, it is pure in the required rigidity that seems of sealing of relative sealing hoop head after stressed holding tube to clasp hoop, be enough to make connecting body to powerful reaction force of sealing hoop output, the extruding that fully impels the sealing hoop head to finish pipe promptly seals rapidly; Because drive nut is stubborn excessively, one does not make sealing hoop lose efficacy---because squeeze recessed clasping hoop and again can't cross over the depression trough and continue to squeeze forward the motive sealing hoop by connecting leg, even two do not influence the restoring force of clasping hoop---clasping hoop has plastic deformation also not influence its strutting property, therefore, stubborn excessively little to the proper functioning and the repeated disassembled and assembled influence of this structure.

So after the structure of clasping hoop changed opening elasticity into by non-opening elasticity, the sealing that the pipe extruding is connect was more effective, make fastening more reliable that extruding connects, and the dismoutability that the pipe extruding is connected is better.

Description of drawings

Fig. 1 and Fig. 2 are straight-through adjustable joint fittings of implementing this patent, are used to finish the connection of pipe to pipe, and wherein part 1 is a connecting body, and part 2 is sealing hoops, and part 3 is to clasp hoop, and part 4 is to squeeze the hoop drive nut.Fig. 1 is its two-dimentional half sectional view, and Fig. 2 is its three-dimensional exploded view.

Embodiment

As depicted in figs. 1 and 2, when drive nut (4) is twisted on the outside thread of connecting body (1), drive nut drives by its inner conical surface and clasps hoop (3), and the circular section steel wire bends clasps the inner conical surface that outer cone that the afterbody inner conical surface that binds round by sealing hoop (2) drives the sealing hoop head is again gone into connecting body; Under the mating reaction of interior male cone (strobilus masculinus), the head of sealing hoop tightens at connected tube-surface and finishes being tightly connected of pipe, and clasps constriction tightly at connected tube-surface, finishes being fastenedly connected pipe; Owing to clasp the effect of hoop, when drive nut is tightened on the connecting body, clasp hoop and supportting sealing hoop all the time, the connecting body inner conical surface is almost all fed back to the head of sealing hoop to the reaction force (compressive force) of sealing hoop, strengthen the dynamics and the reliability of sealing, after drive nut withdraws from from connecting body, elasticity is clasped hoop and is restored, pine is from by the tube-surface embraced, and the permission sealing hoop connecting body that slips away on pipe allows connecting body unload down from connected pipe.

Dual hooping squeezing connecting pipe joiner of the present invention except being used for above-mentioned straight-through tube fitting, also can be used for the connecting end of other pipe connector and its valve etc.

Claims

1. squeezing connecting pipe joiner, by connecting body, sealing hoop, clasp hoop and squeeze hoop drive nut composition, at first successively with drive nut, clasping hoop is sleeved on the pipe of preparing to be connected with sealing hoop, secondly cover is installed drive nut, the tube head of clasping hoop and sealing hoop inserts in the connecting body, then drive nut is tightened on the outside thread of connecting body, drive nut just orders about to clasp and binds round sealing hoop afterbody inner cone, clasping hoop orders about sealing hoop again and causes its head outer cone and go into the connecting body inner cone, finally make the sealing hoop head be stretched in connecting body and by between the connecting leg surface, finish being tightly connected pipe and body; It is characterized in that described to clasp hoop be an elastic opening packing ring, the afterbody of described elastic opening packing ring is subjected to driving structure consistent with its driving structure of nut of driving, and the head driving structure is that sphere or the conical surface are so that drive in sealing hoop afterbody inner cone.

2. press the described squeezing connecting pipe joiner of claim 1 for one kind, it is characterized in that described elastic opening packing ring is that a circle bends the open washer that forms with the circular section steel wire.