CN102203490B

CN102203490B - A pipe coupling

Info

Publication number: CN102203490B
Application number: CN200980142195.0A
Authority: CN
Inventors: 玛诗答·彬蒂·阿布杜·马里克
Original assignee: KINDRACO HARDWARE Sdn Bhd
Current assignee: KINDRACO HARDWARE Sdn Bhd
Priority date: 2008-10-22
Filing date: 2009-07-31
Publication date: 2014-01-22
Anticipated expiration: 2029-07-31
Also published as: WO2010047573A1; CN102203490A; NZ592253A; AU2009307148A1; AU2009307148B2

Abstract

A pipe coupling is disclosed comprising a body (20) providing a tubular conduit enabling fluid flow therethrough from one end to the other. Each end is provided with an inner tubular portion into which a pipe end (10, 12) may be inserted. The body (20) has external threading and an outer tubular portion having a diameter larger than the inner tubular portion wherein an annular surface transiting between said inner and outer tubular portions is provided. A gasket ring (40) having a diameter suitable to fit around the pipe end (10, 12) is provided seated at the annular surface. A clinching sleeve (60) is further provided comprising a ring portion at one end having a diameter disposable within the outer tubular portion of the body (20) and providing an abutment surface against the gasket ring (40) upon being seated. A plurality of clinching flaps extends from the other end of the ring portion wherein each of the clinching flaps' inner surface is provided with gripping means and distributed to encircle a pipe end (10, 12). A coupling nut (80) is also provided having an inner opening at one end provided with internal threading complementary to said body's external threading, and an outer opening at the other end sufficient for the pipe end to be inserted therethrough.

Description

Pipe connector

Technical field

The present invention relates to a kind of for managing the coupling assembly of end-to-end link, its generally include at a pipe end to guiding the tube-shaped main body, clamping sleeve, seal ring of fluid between the other end and for locate the coupling nut of anti-fluid in every one end of main body.There is the feature of the improvement of assembling in advance of official seal fluid and joiner to be disclosed.

Background technique

In the technology of the end-to-end link of the polymer conduit of the guiding for fluid, the whole bag of tricks parts have been used.The center of various parts is the main bodys (it can also be known as " tube-shaped main body " hereinafter) that are provided with longitudinal relative end opening, and described longitudinal relative end opening is for realizing the fluid connection of passing main body between corresponding end.Other parts such as seal ring, clamping sleeve and/or coupling nut are configured to make the anti-fluid of joint in essence.

At general early stage connecting means---Malaysian patent No. MY-127, in 837-A (Hansen) (corresponding to U.S. Patent number 5,687,994), tube-shaped main body is provided with the end that is suitable for being inserted into pipe end.When coupling nut 2 is configured to that pipe end is fixed to and is inserted in polymer pipe end when engaging in the bulk end of its internal surface, barb (6) and/or ring rib (10,14) are configured to clamp respectively and anti-fluid.

U.S. Patent number 5 as his later stage, disclosed in 857,719 (Hansen), from this inventor's patent right, can find out, the insertion of attachment portion in pipe end abandoned, and to be conducive to that pipe end is inserted to the outer surface for polymer pipe in the attachment portion of tube-shaped main body, engages.Further development is so that the introducing of the sleeve of better interface to be provided between main body and coupling nut as the intermediate member between bulk end and coupling nut.Flexible or compressible seal ring is also introduced into, as the anti-Fluid Sealing between butting surface.The number of patent application WO 95/035508 (Philmac) that PCT announces may be the predecessor of this sleeve and seal ring development.

Sleeve is variously referred to as " compression sleeve ", " clamping sleeve ", " closing sleeve " etc., in order easily to quote in this manual, is called below " clamping sleeve ".The further development that sleeve is carried out causes for the annular portion of contiguous seal ring with for the development of the clamping part that clamps on the outer surface at polymer pipe end.In the number of patent application WO02/504669 (Philmac) that this development can be announced at PCT, see, wherein seal ring adjacent part and clamping are partly set to two individual components.

The clutch features of disclosed clamping sleeve in the number of patent application WO 03/010461 (Philmac) that is for example on the other hand to announce at PCT of development, wherein with the metal tape of spike as another independently parts be arranged on the internal surface of clamping sleeve.Thereby be rendered as the pipe part of coupling assembly and the hyperplasia gradually of parts, to realize better connection.

Open general introduction

Be intended to disclose a kind of pipe connector, it is assembled 3 parts that have except seal ring fully, that is, main body, clamping sleeve and coupling nut, seal ring can provide effective connection, for example the end-to-end link of polymer pipe.As by explanation below, on existing parts, can carry out or many improvement are provided and do not need to introduce other parts or part.

For this purpose, a kind of pipe connector is disclosed now, it comprises the main body with tube-shaped catheter, and described tube-shaped catheter is used for making fluid from the first opening, to flow at least the second opening through it, and at least one in wherein said opening is provided with the interior barrel portion that pipe end can be inserted into; The outer barrel portion with the diameter of the diameter that is greater than interior barrel portion is wherein provided with the annular surface of transition between described interior barrel portion and outer barrel portion; And outside thread; Seal ring, it has and is suitable for the diameter that coordinates and be placed at described annular surface place around described pipe end; Clamping sleeve, it comprises having at one end the diameter in the outer barrel portion that can be disposed in main body and the annular portion against the abutment surface of described seal ring is provided when being placed; With a plurality of clamping sheets that extend from the other end, wherein described in each, the internal surface of clamping sheet is equipped with clamp device and is scattered in around pipe end; And at one end there is inner opening and at the other end, there is the coupling nut of outward opening, inner opening is provided with the internal thread with the outside thread complementation of described main body, and outward opening is enough to make pipe end to pass it to be inserted into.

In the first aspect of pipe connector, at least one convex parts is arranged on the internal surface of described outer barrel portion of main body, and at least one bump is arranged on the outer surface of clamping sleeve annular portion, in mutually cooperating, the rotation of described clamping sleeve in described main body is less than a circle thus.Preferably, be provided with a plurality of convex partss and/or a plurality of bump.Still preferably, 3 convex partss are equidistantly set up each other along the described internal surface of described main body.3 bumps are preferably equidistantly set up each other along the described outer surface of described clamping sleeve annular portion.3 convex partss also can be preferably equidistantly set up each other along the described outer surface of described clamping sleeve annular portion, and cooperation is restricted to 1/3rd by clamping sleeve and rotates mutually thus.

In a concrete mode of execution, at least one convex parts is arranged on the internal surface of outer barrel portion of main body, and at least one keyway is arranged on the outer surface of clamping sleeve annular portion, thus, convex parts can be inserted in described keyway and by clamping sleeve the limit rotation in described main body in width of keyway.Preferably, be provided with a plurality of keyways corresponding to a plurality of convex partss.6 keyways are preferably equidistantly set up each other along the described outer surface of clamping sleeve annular portion, and 3 convex partss are arranged in position complementary in main body to be inserted in corresponding keyway.Preferably, convex parts is configured to enough narrow to allow limitedly slip in keyway, so that the rotation of clamping sleeve in main body is correspondingly limited.

In the second aspect of pipe connector, the clamp device being arranged on the internal surface of clamping sheet comprises barbed edge, a circumference is defined on the top of barbed edge (tip), and pipe end can be inserted in this circumference and described barbed edge can not cut in described pipe end surface.When described coupling nut is tightened, due to the internal surface institute applied pressure of coupling nut, clamping sheet is preferably curved inwardly, and barbed edge is clamped on pipe end surface securely.And clamping sleeve can be provided with 3 clamping sheets symmetrically, the internal surface of described clamping sheet has the barb with root face edge.Preferably, the angle of each clamping sheet is by rounding and separated from one another by U-shaped otch.Another preferred feature be have the annular portion that adjoins clamping sleeve clamping sheet base portion reeded middle body is set.

In a third aspect of the present invention, the abutment surface of clamping sleeve annular portion has by the circumferential edges of rounding.Preferably, abutment surface comprise protuberance by the circumferential lip of rounding, this circumferential lip can comprise surperficial inside [bottom] section that profile is processed to the to cover seal ring recessed surface of circumference around.Most preferably, the profile on the recessed surface of circumference is processed to cover around the inside or bottom quadrant of cross-sections surfaces of seal ring.Alternatively, the inner opening of clamping sleeve annular portion comprises tapered section.

In the fourth aspect of pipe connector, the outer surface of coupling nut is provided with longitudinal rib, and the longitudinal rib outside top of at least neck of opening extends from inner opening end.Preferably, outward opening end margin is provided with the peripheral flange extending internally, and when coupling nut is rotated to tighten, the end of clamping sheet is remained in described outward opening end thus, and wherein all the other diameters of outward opening is enough to make pipe end to pass it to be inserted into.Peripheral flange preferably outside open end edge be around continuous, form the antelabium around described outward opening.

In aspect the 5th, at least one projection is arranged in the root of the externally threaded screw thread of main body or between the adjacent crest of the externally threaded screw thread of main body.Preferably be arranged to along the crest of the internal thread of coupling nut with at least one pit of projection complementation.As preferred embodiment, a plurality of pits are arranged to the internal thread along coupling nut.Preferably, projection is arranged on around the penultimate screwed portion of screw thread.Another group projection can be arranged on the screw thread on the opposite side of circumference of main body similarly.Preferably, projection is configured to just before the complementary threads of coupling nut or main body stops, engage.This joint may cause the distortion of complementary threads when tightening.

Pipe connector the 6th aspect in, the interior barrel portion of main body is provided with in fact along described interior barrel portion longitudinal extension and a plurality of ribs of distributing symmetrically around interior barrel portion.A plurality of ribs are preferably become to provide around the steadily cooperation closely that can insert pipe end wherein by copying.

Each above-mentioned parts, that is, the parts that clamping sleeve, tube-shaped main body and coupling nut can be used as in conventional compatible pipe coupling assembly are used independently.Similarly, many features of corresponding part can be provided independently, and corresponding part can be used in conventional compatible pipe coupling assembly.Above-mentioned parts also can be used as the joiner of assembling in advance and is provided.

List of drawings

With reference to being used from and illustrating exemplary but the following drawings of nonrestrictive realization of the present invention with detailed description one thereafter, above-mentioned embodiments of the present invention and their principle of work and power and advantages separately can be understood better, wherein:

Fig. 1 demonstrates the assembled pipe connector of installing on pipe end joint according to the present invention with front view;

Fig. 2 is with the pipe connector of cross sectional view explanatory drawing 1;

Fig. 3 describes to be independent of the pipe connector being pre-assembled of the present invention of pipe joint with front view;

Fig. 4 illustrates the pipe connector being pre-assembled of Fig. 3 with cross sectional view;

Fig. 5 represents according to tube-shaped main body of the present invention with front view;

Fig. 6 is with the tube-shaped main body of cross sectional view explanatory drawing 5;

Fig. 7 demonstrates the mode of execution of the multiple tube-shaped main body that feature of the present invention can be used;

Fig. 8 describes according to two of clamping sleeve of the present invention mode of executions with perspective view;

Fig. 9 A illustrates in the clamping sleeve of Fig. 7 with side view, and Fig. 9 B and Fig. 9 C demonstrate the optional mode of execution of the limited rotation of the clamping sleeve with keyway feature;

Figure 10 A, Figure 10 B, Figure 10 C, Figure 10 D, Figure 10 E and Figure 10 F represent the detailed cross sectional view of clamping sleeve;

Figure 11 demonstrates according to coupling nut of the present invention with side view;

Figure 12 comprises with Figure 12 A of the coupling nut of cross sectional view explanation Figure 11 and Figure 12 B and Figure 12 C of schematic diagram that demonstrate the various features of coupling nut;

Figure 13 depicts the pipe connector that comprises the aforesaid tubular main body, clamping sleeve and the coupling nut that are pre-assembled according to of the present invention together with inserted seal ring;

Figure 14 illustrates the pipe connector of Figure 13, and wherein coupling nut is used the clamping sleeve being clamped in completely on pipe to be tightened.

The detailed description of embodiment

As general mode of execution of the present invention, common Fig. 1 and the Fig. 2 that shows the cross sectional view of the pipe coupling assembly that we propose with reference to showing the exterior frontal view of the pipe coupling assembly that we propose, pipe coupling assembly comprises tube-shaped main body (20), seal ring (40) (being hidden in Fig. 1), clamping sleeve (60) and between two pipe ends (10,12), forms the coupling nut (80) of end-to-end joint.Fig. 3 and Fig. 4 demonstrate the identical pipe coupling assembly of the pipe end not being inserted into wherein.

Be presented in exterior frontal view in Fig. 5 and the cross sectional view in Fig. 6 is the main body (20) that comprises tube-shaped catheter (22), tube-shaped catheter (22) makes fluid from the first opening (24), flow at least the second opening (26) through it, and vice versa.As the conventional mode of execution of pipe connector, main body can be configured to for example various types of joints shown in Fig. 7 A-7J, wherein

Fig. 7 A shows external screw thread straight joint or adaptor;

Fig. 7 B shows reducing straight joint or adaptor;

Fig. 7 C shows female thread straight joint or adaptor;

Fig. 7 D shows reducing T connector;

Fig. 7 E shows external screw thread T connector;

Fig. 7 F shows female thread T connector;

Fig. 7 G shows isometrical T connector;

Fig. 7 H shows equal-diameter elbow or L-type joint

Fig. 7 H shows female thread bend pipe; And

Fig. 7 J shows external screw thread bend pipe.

The present invention even can be implemented on the outer pipe of container or inlet duct, and wherein an only side of pipe or " main body " is by threading, for connecting clamping sleeve (60), seal ring (40) and coupling nut (80).Therefore, the present invention is defined as to comprise this " one-sided " or " one end " realization of pipe coupling assembly by this way.Yet in normal pipe coupling assembly, tube-shaped main body (20) has each at least one pair of in clamping sleeve (60), seal ring (40) and coupling nut (80) conventionally.

Opening is provided with interior barrel portion (28), and pipe end (10) can be inserted in interior barrel portion (28).This interior barrel portion (28) extends to the outer barrel portion (30) with the diameter that is greater than interior barrel portion (28).Transition between interior barrel portion (28) and outer barrel portion (30) can be set to the annular surface (32) for settling seal ring (40).Seal ring (40) has the diameter that snug fit is provided around pipe end conventionally, and therefore the diameter of annular surface (32) and profile can correspondingly be set up.

The outer surface of outer barrel portion (30) can be provided with the outside thread (34) with the internal thread complementation of coupling nut (80).As shown in the drawing, if desired, screw thread (34) can extend to make coupling nut (being explained in the back) can provide required fastening above the outer surface of interior barrel portion 28.Intermediate portion can be provided with rib (36) or the spoke of AD HOC, so that main body can or be clamped by hand simply by spanner or customization wrench.

As a supplement or optional feature, main body can be provided with along described interior barrel portion longitudinal extension and a plurality of ribs (27) of distributing symmetrically around described interior barrel portion, so that pipe end can be inserted in the interior barrel portion (28) of main body (20) closely, and in axially concentrated mode, be inserted into so that the twisting stress on any pipeline that is applied in joiner outside can not cause against the specific part of seal ring or any leverage stress (leverage stress) of position, it may affect emphatically the effect of the fluid-proof property matter of seal ring.For example, the quantitative range of rib can from 3 to 8, and equally distributed around the surface of interior barrel portion (28).A plurality of ribs (27) also can correspondingly be become to provide around the tight or snug fit that is inserted into the pipe end (10) in interior barrel portion (28) by copying.

The critical component of pipe coupling assembly is clamping sleeve (60), and it is shown jointly in Fig. 8, Fig. 9 A-9C and Figure 10 isolatedly.Generally, clamping sleeve (60) can be envisioned for and comprise two parts, that is, and and annular portion at one end (62) and a plurality of clamping sheets (64) from its extension at the other end.Annular portion (62) has the diameter in the outer barrel portion (30) that makes annular portion (62) can be disposed in main body (20).In the time of on the annular surface (32) that is positioned in main body (20), the end of annular portion (62) is also provided with the abutment surface (66) for engaging or dock against seal ring (40).Each the clamping sheet (64) extending from the other end of clamping sleeve (60) is provided with clamp device (68) at the internal surface of clamping sheet.Clamping sheet (64) is preferably scattered in around pipe end (10).

With reference to Figure 11 and Figure 12, another parts of pipe coupling assembly are coupling nut (80), and coupling nut (80) is at one end provided with internal thread (82) along inner opening (84).Internal thread (82) is configured to outside thread (34) complementation with main body (20).At the other end, coupling nut (80) is provided with outward opening (86), and outward opening (86) has is enough to allow pipe end (10) through its diameter being inserted into.

Describe after the basic configuration of the parts of managing coupling assembly, we will describe hereinafter now the various functions of joiner in detail and realize the feature of the parts of such function.

An advantage of pipe coupling assembly is following feature: when coupling nut (80) is rotated and is tightened during join operation, and the rotation of restriction clamping sleeve (60) in the outer barrel portion (30) of main body (20).In conventional coupling assembly, the rotation of clamping sleeve makes the edge of annular portion or abutment surface rotate against seal ring, simultaneously when it is arranged to be placed in the annular surface of tube-shaped main body, compresses it.This is the main cause of the fretting wear of seal ring, in fact, is the main cause that seal ring damages when the installing first of coupling assembly, causes the shortly after that leakage of fluid.

For reducing this damage, we limit circumferential distance as possible, at the annular portion (62) of clamping sleeve above this circumferential distance, can in the outer barrel portion (30) at tube-shaped main body, rotate.This limits again abutment surface (66) against the friction of seal ring (40), and therefore reduces the damage that seal ring (40) is caused.There is the rotation of clamping sleeve (60) and the many possible mode that reduces the degree of rotation of clamping sleeve (60) of reducing.Method be a key slot locking, the key wherein adjoining each other is arranged on each tubular engaging surface.In the most basic configuration, convex parts 38 is arranged on the internal surface of outer barrel portion (30) of main body (20), and bump (78) is arranged on the outer surface of clamping sleeve annular portion (62), so that convex parts (38) mutually cooperates and is adjacent to each other with certain position in rotation with bump (78), the rotation of clamping sleeve (60) is limited to and is less than a circle.

Certainly, by being set, more convex parts (38) and/or bump (78) further limit rotation possibility or even more desirable.For example, by 3 convex partss (38) of making equidistantly to distribute around the internal surface of the outer barrel portion of main body against the single bump (78) on the outer surface of the annular portion at clamping sleeve (62), can be by limit rotation to being less than 1/3rd, although certainly also can be by making 3 bumps (78) realize this against 3 convex partss (38).

On the other hand, the elastic surface that is limited in seal ring against the surface sliding between the abutment surface (66) of the annular portion (62) of clamping sleeve may still be considered to set up seal ring suitably and the arrangement of being close to realizing that the compressive surfaces of better anti-fluid object contacts, be desirable.Therefore,, aspect anti-fluid, have more than the convex parts of 4 and maybe rotation is reduced to and is less than 1/4th and may not can causes better advantage.

Another mode of execution of the clamping sleeve that restriction is rotated in main body (20) has been shown in Fig. 9 B and Fig. 9 C, wherein keyway (77) is arranged on the annular portion (62) of clamping sleeve (60), it can be inserted in main body, and convex parts (38) is complementally placed in keyway (77).If convex parts (38) is designed to enough narrow, once in keyway (77), convex parts (38) can slide in the width of keyway (77), thereby allows the limited rotation of clamping sleeve 60 in main body when clamping sleeve (60) is tightened.Because the limited rotation being allowed to will help the surface of contact of O shape ring docking main body (20) and clamping sleeve for better anti-Fluid Sealing, so rotate, should not omit completely.

Preferably, a plurality of keyways 78 corresponding to a plurality of convex partss (38) are set.For clamping sleeve is easily inserted in main body (20), a plurality of keyways should complementally mate the position of the convex parts (38) in main body (20).For example, if 6 keyways (77) are configured to mate with 3 clamping sheet mode of executions of the mode of execution of the clamping sleeve shown in Fig. 9 B and Fig. 9 C, they should equidistantly be set up each other along the outer surface of described clamping sleeve annular portion (62), so that 3 convex partss (38) in main body (20) are complementally positioned to insert in corresponding keyway (77).

The advantage of using this mode of execution with the clamping sleeve of keyway to obtain limits rotation according to the quantity of set keyway and width.For example, in the above-mentioned mode of execution being set up at 6 keyways (77), the rotation of clamping sleeve (60) in main body (20) is 1/6 circle or 60 °, 1/6 circle or 60 ° are optimum for tightening, and allow the sliding compression of O shape ring on the O of elastic polymer material shape ring, not apply too many wearing and tearing to obtain required seal action on contact surface.

Because the necessary gap of docking of bump (78) and bump (78) is eliminated now or is reduced considerably, another main advantage being produced by this keyway configuration is the diameter that is suitable for the clamping sleeve of inner major diameter.There is larger-diameter clamping sleeve (60) relatively firmer and improve it and the docking of the internal surface of main body (20).Because the gap between clamping sleeve (60) and main body (20) is reduced or eliminates, to the support of the butting surface of O shape ring thereby be increased and anti-Fluid Sealing is enhanced.

As described above, at the other end of clamping sleeve, a plurality of clamping sheets (64) extend from annular portion (62), and wherein each clamping sheet (64) is provided with clamp device (68) at the internal surface place of clamping sheet.Clamp device (68) is preferably set to the barbed edge that its end defines a circumference, pipe end (10) through around clamping sheet (64) and through annular portion (62) while being pushed, pipe end can be inserted in this circumference and a lot of resistances of not causing because of cutting or the scraping on pipe end surface.

Although there is the many possible configuration of the clamping sheet (64) distributing around sleeve, but a kind of desirable configuration is to make distributed clamping sheet equably around pipe end (10), so that can be applied equably in the lip-deep clamping force of pipe end (10).For this object, propose can in fact configure from 3 to 6 any amount of clamping sheet on clamping sleeve (60).In Fig. 8,3 chips and the 4 chip mode of executions of clamping sleeve are shown.

The barbed edge of clamp device (68) can or can cut, carve or draw in pipe end surface so that the sharpened edge of strong clamping to be provided, or have to be just enough to provide on pipe end and firmly clamp and not the root face edge of the profile of damaging surface or the edge of rounding.In the sharp keen cut edge of barb and the variation between the edge contour of rounding or mobility scale, will depend on the integrity (for example whether pipe stands to pull out the stress test of joiner) of the material of pipe to be connected, hydrodynamic pressure to be comprised, tolerable leakiness, needed pipe joint and whether need to remove rapidly and connect and again (for example connect, the indentation of pipe end or to scratch not to be desirable wherein, because due to impaired pipe end, it may become and be not suitable for again connecting), etc.

Another desirable feature of clamping sleeve (60) is that the end of each clamping sheet (64) is arranged to have by the angle of rounding and edge (65).Similarly, the otch between sheet or space are also preferably by rounding (67) or be also set to U-shaped otch.This rounding at edge and angle by reduce these stippled or scrapings to adjoin or the parts of adjacency on occurrence frequency, no matter it is pipe end (10), seal ring (40) or tube-shaped main body (20), unnecessary obstruction or coarse insertion that this may cause parts, cause destruction of adjacent part etc.U-shaped otch (67) between clamping sheet (64) by the situation at the angle of rounding in, this feature can reduce material breaks, because when coupling nut (80) is tightened, by pipe end (10), inserted and/or clamping sleeve around pipe end tighten and during causing stress sheet (64) be bent.

In another mode of execution or preferred distortion of clamping sleeve (60), the scope of U-shaped otch (67) also can change (quantity that depends on clamping sheet (64) to be arranged) between 3 otch or 4 otch, so that all the other width of annular portion (62) are corresponding with the degree of otch.The advantage of each or at least one the U-shaped otch of change in annular portion (62) is the bending response that the change of clamping sheet (64) is provided during the insertion of pipe end (10).Figure 10 (F) demonstrates the example of this clamping sleeve (60) of the U-shaped otch (67) that is provided with intensity of variation.

For making another feature of clamping sheet (64) the clamping sleeve (60) that easily bending arranges be, make the base portion attenuation of the clamping sheet (64) located at annular portion (62), for example, in Fig. 8 and Fig. 9 A, be illustrated as square groove (70).For example, when from inner pressurized, (working as pipe end (10) is inserted into, while making sheet outwardly-bent) or for example, during from outside pressurized (when coupling nut (80) is tightened to promote clamping sheet and curves inwardly), this attenuation of material or reduce and will make clamping sheet (64) easily warpage or bending.In the latter, due to the aduncate degree of tightening the clamping sheet (64) that institute's applied pressure causes by coupling nut (80) for giving necessary power so that barbed edge (68) can be securely on the surface of pipe end (10) clamping may be crucial.

About the abutment surface (66) on the annular portion in clamping sleeve (60) (62) end, now will be about describing more detailed feature with most preferred mode contiguous seal ring.

For abutment surface (66) can as far as possible softly and reposefully be contacted with seal ring, the circumferential edges of abutment surface (66) should be preferably as shown in FIG. 10A by rounding (72).Use the edge of this rounding, the incidence rate of scratching or damage seal ring surface via abrasive acrion when clamping sleeve (60) is rotated and/or inwardly pushed in tube-shaped main body (20) can be reduced.

As further improvement, abutment surface (66) can be provided with protuberance as shown in Figure 10 B by the circumferential lip of rounding (73).This protuberance by the circumferential lip of rounding (73), may and be prevented that edge (72) from directly contacting seal ring at contiguous seal ring time more effective, although edge (72) can be by rounding.Can by the circumferential lip of rounding, to this abutment surface (66), be done further improvement by what the protuberance with recessed surface (74) as shown in Figure 10 C was set.By recessed profile is conformed to the surface of seal ring, protuberance by the recessed surface of rounding, will be guaranteed that the complementally relative seating surface on the side of the clamping sleeve of seal ring is placed in the annular surface (32) of tube-shaped main body (20) securely.

The most preferred mode of execution of the abutment surface of clamping sleeve (66) is the recessed surface of circumference (75) to be set contour machining is become to cover inner section or the lower section of the section (42) of seal ring (40), as shown in Figure 10 D.Should be understood that word " bottom " is relative term, because supposition seal ring is placed on horizontal plane, and clamping sleeve is inserted in the tube-shaped main body (20) of vertical orientation and approaches seal ring from bottom.Another perspective view of this mode of execution can be described to be provided with the recessed surface of circumference (75) contour machining is become to cover around the surperficial interior lower quadrant of the seal ring (40) in cross sectional view.

Although the recessed surface (75) of this outside orientation may by provide from the power of clamping sleeve outwards or expansion translation to settle seal ring to make seal ring (20) be effectively against the annular surface (32) main body (20) in during to external compression, geometry inversion or the mirror image on this recessed surface (75) are also possible.That is to say, the annular portion edge of clamping sleeve can be provided with the recessed surface (76) to interior orientation as shown in Figure 10 E so that when clamping sleeve is tightened and is pushed in main body (20) seal ring (20) around pipe end surface by upcountry or contractibility compress.It is contemplated that, if the balance between the outside compressive force on seal ring and inwardly contractile force expect, can select the mode of execution shown in Figure 10 C, wherein the recessed surface (74) of symmetry is set up.

Therefore, should note, the abutment surface (66) of clamping sleeve (60) can have many variations aspect profile and profile, so that effective adjacency and the compressive surfaces against the polymeric seal ring of the elastic property in the annular surface that is positioned in tubular ring (20) (32) to be provided.What solve on the other hand " is placed " about the phrase using when mentioning seal ring.This phrase is used to indication adjacency rather than be in fact placed when (or by hanged) when being placed on position in, so that the actual placement of seal ring is for example not limited to be in fact placed in the position in its annular surface (32) in tube-shaped main body (20) at the assembly process in advance of the various parts of pipe connector.

As shown in some figure in the various configurations on recessed surface and orientation, the inner circumference opening of clamping sleeve (60) can outwards be tapered a little (79), so that seal ring easily abuts against 3 different contact surfaces of junction point, that is, against the surface of the annular surface (32) of tube-shaped main body, the abutment surface (66) of clamping sleeve and pipe end (12).Can note, arranging of this tapered section 79 can be outside or inside, and is optional under any appearance of situation below or the adopted situation of advantage.

When clamping sheet (64) is pushed to when interior, tapered section (79) can be set for compensate for bend, so that the pipe contact surface of the internal surface of annular portion (62) keeps open and flat on the surface of pipe end (10).In order to make pipe end (10) easily insert and extract out, wherein the assembling of pipe connector and fixing during may need part to extract out or removed when being tightened and locking at joiner before to connect or during adjusting, this tapered section (79) are also favourable.The useful another kind of situation in tapered section is that the annular portion (62) by clamping sleeve (60) provides in the lip-deep clamping of pipe end (10), clamping sleeve (60) only has the clamp device at the place, outer end that is arranged on it in other side, that is, clamping sheet (64).

The last basic element of character of the pipe connector being described is coupling nut (80), and it is jointly described in Figure 11 and with cross sectional view with external view in Figure 12 A.A preferred feature of coupling nut is to have rib (84), and the outer surface longitudinal extension of rib (84) from inner opening (84) along nut is to cover at least a portion of neck (83).These longitudinal ribs (84) rotate when also tightening nut cooperates with the outside thread with tube-shaped main body (20) (34) and provide the reinforcement of coupling nut structure and the clamping to user's hand or instrument at the internal thread along it (82).

Another of coupling nut (80) is characterised in that outward opening (86), and wherein its edge is provided with the peripheral flange (87) extending internally.When nut is tightened so that clamping sheet when upcountry shrinking all the other diameters of outward opening (86) simultaneously and be still enough to allow pipe end to have the specified diameter to specific tube coupling assembly around pipe end, the end maintenance that the width of this flange (87) will be enough to make clamping sheet (64) within it.Although peripheral flange (87) can be set to discontinuous extension (87a) as shown in Figure 12B in various configurations, the continuous flange around the formation at the edge of outward opening (86) around its antelabium is preferred.

Another complementary features of the coupling nut (80) cooperating with tube-shaped main body (20) is described now.In the externally threaded root (or between crest) of main body (20), one or more projections (29) can be set.Complementally, crest along the internal thread of coupling nut can arrange one or more pits (89), so that in the screw thread being tightened between two co-operating screw threads, projection (29) can be positioned in pit (89) closely, avoids thus thread looseness.The joint of this projection in pit is similar to the joint of tongue in groove because feature can be arranged between cooperation part conversely, for example projection (29) can be arranged on the internal thread of coupling nut (80) and pit on the outside thread of main body.Due to this optional configuration in brains, so we carry out description below, and are not limited to the first example.

The screw thread that schematically shows coupling nut in Figure 12 C little by little raises (90) in order to tighten, and when projection (29) rotates and falls closely in pit (89) above the place of tightening, the setting of pit (89) can cause click.Along the screw thread of tightening, a plurality of pits (89) can be set, so that engage continuously by projection the corresponding click that each pit produces, can indicate different engagement positios.For example, the position that the first click clatter can indicator tube joiner be pre-assembled and preparing for the insertion of pipe end, and click clatter indication coupling nut (80) is subsequently tightened in the top of clamping sleeve (60).

As preferred embodiment, pit is not arranged on screw thread, but the screwed portion of screw thread is alternatively set to the crest of attenuation so that nut couplings tighten tightening the distortion of end place and producing thus corresponding pit of by the crest that makes projection the make attenuation projection stroke on crest.

Figure 13 and Figure 14 be the assembly of tightening in advance of display tube joiner and the assembly of having tightened as a comparison, and wherein barb is shown as clamping on pipe end surface.

Because pipe connector of the present invention comprises 3 critical pieces,, tube-shaped main body (20), clamping sleeve (60) and coupling nut (80), many features described herein can only be arranged on one of these parts upper and can use with together with conventional parts.Similarly, also can in conventional joiner, effectively adopt by only feature being set on of these parts the feature of the cooperation that needs two or more parts.Thereby we provide as possible and are directed to such as the claim of the single parts of clamping sleeve, main body and coupling nut and do not abandon monotony of the present invention, and these claims are regarded as dropping in general inventive concept.The joiner of assembling in advance is also contained in this covering statement comprising, and wherein one or more features can not be operation or effective, until pipe end has been inserted into and has tightened therein.

Although the concrete and exemplary feature of each parts of managing coupling assembly is at length contained in aforementioned description, but for technician, obviously many aforementioned features can be used as optional configuration and are reconfigured, replace, change or arrange, but still use identical universal, function or working principle.These that specifically do not mentioned in this article change, replace and optional mode of execution will not be regarded as departing from the present invention, but should be regarded as dropping in the scope and word of claim below.

Claims

1. a pipe connector, comprising:

Main body (20), it has tube-shaped catheter, and for making fluid flow at least the second opening (26) from the first opening (24) through it, at least one in wherein said opening is provided with:

Interior barrel portion (28), pipe end (10,12) can be inserted in described interior barrel portion;

Outer barrel portion (30), it has the diameter of the diameter that is greater than described interior barrel portion (28), wherein between described interior barrel portion (28) and outer barrel portion (30), is provided with the annular surface (32) of transition; And

Outside thread (34);

Seal ring (40), its diameter makes to be suitable for:

Around described pipe end (10,12), coordinate, and

Being positioned in described annular surface (32) locates;

Clamping sleeve (60), it comprises:

Annular portion (62), it at one end has the diameter in the described outer barrel portion (30) that can be disposed in described main body (20) and the abutment surface (66) against described seal ring (40) is provided when being placed; And

A plurality of clamping sheets (64), it extends from the other end, wherein the internal surface of clamping sheet described in each:

Be equipped with clamp device (68), and

Be scattered in around pipe end (10,12); And

Coupling nut (80), it at one end has inner opening (84) and has outward opening (86) at the other end, described inner opening (84) is provided with the internal thread (82) complementary with the outside thread (34) of described main body, and described outward opening (86) is enough to make described pipe end (10,12) to be inserted into through it.

2. pipe connector as claimed in claim 1, wherein

On the internal surface of the described outer barrel portion (30) of described main body (20), be provided with at least one convex parts (38), and

On the outer surface of the annular portion (62) of described clamping sleeve, be provided with at least one bump (78),

In mutually cooperating, the rotation of described clamping sleeve in described main body is less than a circle thus.

3. pipe connector as claimed in claim 2, wherein, is provided with a plurality of convex partss (38).

4. pipe connector as claimed in claim 2, wherein, is provided with a plurality of bumps (78).

5. pipe connector as claimed in claim 3, wherein, is equidistantly provided with 3 convex partss (38) each other along the described internal surface of described main body (20).

6. pipe connector as claimed in claim 4, wherein, is equidistantly provided with 3 bumps (78) each other along the described outer surface of the annular portion (62) of described clamping sleeve.

7. pipe connector as claimed in claim 5, wherein, also the described outer surface along the annular portion (62) of described clamping sleeve is equidistantly provided with 3 convex partss (38) each other, and cooperation is restricted to 1/3rd by described clamping sleeve and rotates mutually thus.

8. pipe connector as claimed in claim 1, wherein

On the outer surface of the annular portion (62) of described clamping sleeve, be provided with at least one keyway (77),

Thus, described convex parts (38) can be inserted in described keyway (77) and by described clamping sleeve the limit rotation in described main body in width of keyway.

9. pipe connector as claimed in claim 8, wherein, is provided with a plurality of keyways (77) corresponding to a plurality of convex partss (38).

10. pipe connector as claimed in claim 9, wherein, described outer surface along the annular portion (62) of described clamping sleeve is equidistantly provided with 6 keyways (77) each other, and wherein in the complimentary positions in described main body (20), is provided with 3 convex partss (38) to be inserted in corresponding keyway (77).

11. pipe connectors as claimed in claim 10, wherein, described convex parts (38) is enough narrow to allow limitedly slip in keyway (77), so that the rotation of clamping sleeve (60) in described main body (20) is correspondingly limited.

12. pipe connectors as claimed in claim 1, wherein, the described clamp device (68) being arranged on the internal surface of described clamping sheet (64) comprises barbed edge, a circumference is defined on the top of described barbed edge, and pipe end can be inserted in described circumference and described barbed edge is not cut in the surface of described pipe end.

13. pipe connectors as claimed in claim 12, wherein, when described coupling nut (80) is tightened, due to the internal surface institute applied pressure of described coupling nut (80), described clamping sheet (64) is curved inwardly, and described barbed edge is clamped on the surface of described pipe end securely.

14. pipe connectors as claimed in claim 12, wherein, described clamping sleeve (60) is provided with 3 clamping sheets (64) symmetrically, and the internal surface of described clamping sheet (64) has the barb with root face edge.

15. pipe connectors as claimed in claim 12, wherein, described in each, the angle of clamping sheet (64) is by rounding.

16. pipe connectors as claimed in claim 12, wherein, described clamping sheet (64) is separated from one another by U-shaped otch.

17. pipe connectors as claimed in claim 16, wherein, described at least one, the degree that enters described annular portion (62) of U-shaped otch is different from other otch.

18. pipe connectors as claimed in claim 1, wherein, the middle body of described clamping sheet (62) base portion that adjoins the annular portion of described clamping sleeve is provided with groove (70).

19. pipe connectors as claimed in claim 1, wherein, the abutment surface of the annular portion of described clamping sleeve (62) has by the circumferential edges of rounding.

20. pipe connectors as claimed in claim 1, wherein, described abutment surface (66) comprise protuberance by the circumferential lip of rounding (73).

21. pipe connectors as claimed in claim 20, wherein, described circumferential lip (73) comprises the recessed surface of circumference (74).

22. pipe connectors as claimed in claim 21, wherein, the profile on the recessed surface of described circumference (74) is processed to cover around the surperficial inner section or lower section of described seal ring (40).

23. pipe connectors as claimed in claim 22, wherein, the profile on the recessed surface of described circumference (74) is processed to cover the inside of cross-sections surfaces of described seal ring (40) or bottom quadrant around.

24. pipe connectors as claimed in claim 22, wherein, the inner opening of the annular portion of described clamping sleeve (60) comprises tapered section (79).

25. pipe connectors as claimed in claim 1, wherein, the outer surface of described coupling nut (80) is provided with longitudinal rib (84), and described longitudinal rib (84) extends from the end of described inner opening in the top of at least neck (83) at described outward opening place.

26. pipe connectors as claimed in claim 25, wherein, the edge of described outward opening end (86) is provided with the peripheral flange (87) extending internally, when described coupling nut (80) is rotated to tighten, make thus the end of clamping sheet (64) remain in described outward opening (86), and all the other diameters of wherein said outward opening (86) are enough to make pipe end to pass it to be inserted into.

27. pipe connectors as claimed in claim 26, wherein, described peripheral flange (87) is continuous in the surrounding at described outward opening edge, forms the antelabium around described outward opening (86).

28. pipe connectors as claimed in claim 1 wherein, are provided with at least one projection (29) in the externally threaded root of described main body or between the externally threaded adjacent crest of described main body.

29. pipe connectors as claimed in claim 28, wherein, are provided with at least one pit complementary with described projection (29) along the crest of the internal thread (82) of described coupling nut.

30. pipe connectors as described in any one in claim 28-29, wherein, are provided with a plurality of pits (89) along the crest of the internal thread (82) of described coupling nut.

31. pipe connectors as claimed in claim 30, wherein, described projection (29) is configured to just before the complementary threads of described coupling nut (80) or main body (20) stops, engage.

32. pipe connectors as claimed in claim 31, wherein, described in be bonded on the distortion that causes described complementary threads while tightening.

33. pipe connectors as claimed in claim 1, wherein, the interior barrel portion (28) of described main body is provided with in fact along described interior barrel portion (28) longitudinal extension and a plurality of ribs (27) of distributing symmetrically around described interior barrel portion (28).

34. pipe connectors as claimed in claim 33, wherein, described a plurality of ribs (27) are become around the pipe end (10) that can insert wherein to provide steadily cooperation closely by copying.