CN102203490A

CN102203490A - A pipe coupling

Info

Publication number: CN102203490A
Application number: CN2009801421950A
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: 2011-09-28
Anticipated expiration: 2029-07-31
Also published as: WO2010047573A1; CN102203490B; AU2009307148A1; NZ592253A; 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 coupling assembly that the pipe end opposite end connects that is used for, it generally includes and is used at a pipe end to the coupling nut that guides the tight sleeve of tube-shaped main body, pincers, the seal ring of fluid between the other end and be used for preventing at each end place of main body fluid.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 that is used 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 vertically relative end opening, and described vertically relative end opening is used to be implemented in the fluid that passes main body between the corresponding end and is communicated with.Other parts such as seal ring, the tight sleeve of pincers and/or coupling nut are configured to make joint to prevent fluid in essence.

At general early stage connecting means---Malaysian patent No. MY-127, among the 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 was configured to that pipe end is fixed to and is inserted into to be used in the polymer pipe end to engage on the bulk end of its internal surface, barb (6) and/or ring rib (10,14) were configured to clamp respectively and anti-fluid.

U.S. Patent number 5 as his later stage, disclosed among 857,719 (Hansen), from this inventor's patent right as can be seen, the insertion of attachment portion in pipe end abandoned, and engages to help that pipe end is inserted the outer surface that is used for polymer pipe in the attachment portion of tube-shaped main body.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 the coupling nut.Flexible or compressible seal ring also is introduced into, as the anti-fluid-tight between the 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 differently is called " compression sleeve ", " the tight sleeve of pincers ", " closing sleeve " etc.,, below it is called " the tight sleeve of pincers " in order to quote easily in this manual.The tight development partly of pincers that the further development that sleeve is carried out causes being used for the annular portion of contiguous seal ring and is used for clamping on the outer surface of polymer pipe end.This development can see in the number of patent application WO02/504669 (Philmac) that PCT announces that wherein the tight part of seal ring adjacent part and pincers is set to two individual components.

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

Open general introduction

Be intended to disclose a kind of pipe connector, it can fully assembledly have 3 parts except that seal ring, that is, main body, the tight sleeve of pincers and coupling nut, seal ring can provide effective connection, for example the end-to-end link of polymer pipe.As what will illustrate 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 to make fluid can pass it to flow at least the second opening from first opening, and at least one in the wherein said opening is provided with the interior barrel portion that pipe end can be inserted into; Have outer tubular part, wherein in described, be provided with the annular surface of transition between barrel portion and the outer tubular part greater than the diameter of the diameter of interior barrel portion; And outside thread; Seal ring, it has and is suitable for the diameter that cooperates and be placed at described annular surface place around described pipe end; The tight sleeve of pincers, it comprises having the diameter in the outer tubular part that can be disposed in main body at one end and annular portion to the abutment surface of described seal ring is provided when being placed; With the tight sheet of a plurality of pincers that extends from the other end, wherein the internal surface of the tight sheet of each described pincers is equipped with clamp device and is scattered in around pipe end; And at one end have inner opening and outside the other end has the coupling nut of opening, inner opening is provided with the internal thread with the outside thread complementation of described main body, the external-open stomatopod is so that pipe end passes it is inserted into.

In the first aspect of pipe connector, at least one convex parts is arranged on the internal surface of described outer tubular part of main body, and at least one bump is arranged on the outer surface of the tight sleeve annular portion of pincers, in cooperating mutually, the rotation of the tight sleeve of described pincers 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 equidistantly are set up each other along the described internal surface of described main body.3 bumps preferably equidistantly are set up each other along the described outer surface of the tight sleeve annular portion of described pincers.3 convex partss also can be preferably equidistantly be set up each other along the described outer surface of the tight sleeve annular portion of described pincers, and cooperation is restricted to 1/3rd with the tight sleeve of pincers and rotates mutually thus.

In a concrete mode of execution, at least one convex parts is arranged on the internal surface of outer tubular part of main body, and at least one keyway is arranged on the outer surface of the tight sleeve annular portion of pincers, thus, convex parts can be inserted in the described keyway and with the limit rotation of the tight sleeve of pincers 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 preferably equidistantly are set up each other along the described outer surface of the tight sleeve annular portion of pincers, and 3 convex partss are set in the position complementary on the main body to be inserted in the corresponding keyway.Preferably, convex parts is configured to enough narrowly slide in keyway allowing limitedly, so that the rotation of the tight sleeve of pincers in main body correspondingly is limited.

In the second aspect of pipe connector, the clamp device that is set on the internal surface of the tight sheet of pincers 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 the described pipe end surface.When described coupling nut was tightened, because the internal surface institute applied pressure of coupling nut, the tight sheet of pincers was preferably curved inwardly, and makes barbed edge be clamped in securely on the pipe end surface.And the tight sleeve of pincers can be provided with 3 tight sheets of pincers symmetrically, and the internal surface of the tight sheet of described pincers has the barb that has the root face edge.Preferably, the angle of the tight sheet of each pincers is by rounding and separated from one another by the U-shaped otch.Another preferable feature be have the annular portion that adjoins the tight sleeve of pincers the tight sheet base portion of pincers reeded middle body is set.

In a third aspect of the present invention, the abutment surface of the tight sleeve annular portion of pincers has by the circumferential edges of rounding.Preferably, abutment surface comprise protuberance by the circumferential lip of rounding, this circumferential lip can comprise that profile is processed to cover the recessed surface of circumference around inside [bottom] section on surface of seal ring.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 the tight sleeve annular portion of pincers comprises gradually thin part.

In the fourth aspect of pipe connector, the outer surface of coupling nut is provided with longitudinal rib, and the longitudinal rib top of the neck at least of opening outside extends from the inner opening end.Preferably, outer opening end margin is provided with the peripheral flange that extends internally, thus coupling nut be rotated when tightening end with the tight sheet of pincers remain on described outside in the opening end, and wherein all the other diameters of outer opening are enough to make pipe end to pass it to be inserted into.Peripheral flange is continuous around the open end edge outside preferably, forms the antelabium around described outer 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 set at around the penult 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 engage before the complementary threads of coupling nut or main body stops just.This joint may cause the distortion of complementary threads when tightening.

Pipe connector the 6th aspect in, a plurality of ribs that the interior barrel portion of main body is provided with in fact in described barrel portion longitudinal extension and distributes 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 the tight sleeve of pincers, tube-shaped main body and coupling nut can be used as in the 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 the 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

Illustrate exemplary but the following drawings of nonrestrictive realization of the present invention with reference to being used from thereafter detailed description one, 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 that is pre-assembled of the present invention of pipe joint with front view;

Fig. 4 illustrates the pipe connector that is 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 two mode of executions according to the tight sleeve of pincers of the present invention with perspective view;

Fig. 9 A illustrates in the tight sleeve of pincers 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 tight sleeve of pincers 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 the tight sleeve of pincers;

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 representation that demonstrate the various features of coupling nut;

Figure 13 depicts according to the tight sleeve of aforesaid tubular main body, pincers that is pre-assembled with the seal ring that is inserted and the pipe connector of coupling nut of comprising of the present invention;

Figure 14 illustrates the pipe connector of Figure 13, and wherein coupling nut uses the tight sleeve of pincers that is clamped in fully on the pipe to be tightened.

The detailed description of embodiment

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

Being presented in exterior frontal view among Fig. 5 and the cross sectional view among Fig. 6 is the main body (20) that comprises tube-shaped catheter (22), and tube-shaped catheter (22) makes fluid can pass it and flows at least the second opening (26) from first opening (24), and vice versa.As the mode of execution of the routine 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 the reducing T connector;

Fig. 7 E shows the external screw thread T connector;

Fig. 7 F shows the 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 the female thread bend pipe; And

Fig. 7 J shows the external screw thread bend pipe.

The present invention even can be implemented on outlet of container pipe or inlet duct, wherein an only side of pipe or " main body " is used to connect the tight sleeve of pincers (60), seal ring (40) and coupling nut (80) by threading.Therefore, the present invention is defined as to comprise this " one-sided " or " 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 the tight sleeve of pincers (60), seal ring (40) and the coupling nut (80) usually.

Opening is provided with interior barrel portion (28), and pipe end (10) can be inserted in the interior barrel portion (28).Should extend to the outer tubular part (30) that has greater than the diameter of interior barrel portion (28) by interior barrel portion (28).Transition between interior barrel portion (28) and outer tubular part (30) can be set to be used to settle the annular surface (32) of seal ring (40).Seal ring (40) has the diameter that snug fit is provided around pipe end usually, and therefore the diameter of annular surface (32) and profile can correspondingly be set up.

The outer surface of outer tubular part (30) can be provided with the outside thread (34) with the internal thread complementation of coupling nut (80).As shown in the drawing, if necessary, screw thread (34) can extend above the outer surface of interior barrel portion 28 so that make coupling nut (being explained in the back) can provide required fastening.Intermediate portion can be provided with the 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 center on a plurality of ribs (27) that described interior barrel portion distributes symmetrically, so that pipe end can be inserted in the interior barrel portion (28) of main body (20) closely, and be inserted into so that the twisting stress on any pipeline that is applied in the joiner outside can not cause to the specific part of seal ring or any leverage stress (leverage stress) of position in the mode of axially concentrating, it may influence the effect of the fluid-proof property matter of seal ring emphatically.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 the interior barrel portion (28) by copying.

The critical component of pipe coupling assembly is the tight sleeve of pincers (60), and it is shown in Fig. 8, Fig. 9 A-9C and Figure 10 jointly isolatedly.Generally, the tight sleeve of pincers (60) can be envisioned for and comprise two parts, that is, and and annular portion at one end (62) and at a plurality of pincers tight sheet (64) of the other end from its extension.Annular portion (62) has makes annular portion (62) can be disposed in the interior diameter of outer tubular part (30) of main body (20).When the annular surface that is positioned in main body (20) (32) was gone up, the end of annular portion (62) also was provided with the abutment surface (66) that is used to seal ring (40) joint or butt joint.The tight sheet of each pincers (64) that extends from the other end of the tight sleeve of pincers (60) is provided with clamp device (68) at the internal surface of the tight sheet of pincers.The tight sheet of pincers (64) preferably is 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) at one end is 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 outer opening (86), and outer opening (86) has is enough to allow pipe end (10) to pass the diameter that it is inserted into.

After describing the basic configuration of the parts of managing coupling assembly, we will describe the various functions of joiner now hereinafter 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 during join operation and is tightened, and the rotation of the restriction tight sleeve of pincers (60) in the outer tubular part (30) of main body (20).In the coupling assembly of routine, the rotation of the tight sleeve of pincers makes the edge of annular portion or abutment surface support seal ring and rotates, and compresses it simultaneously when it is arranged to be placed in the annular surface of tube-shaped main body.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 leakage of fluid shortly after that.

For reducing this damage, we limit circumferential distance as possible, can rotate in the outer tubular part (30) at tube-shaped main body at the annular portion (62) of the tight sleeve of pincers above this circumferential distance.This limits the friction that abutment surface (66) is supporting seal ring (40) again, and therefore reduces the damage that seal ring (40) is caused.Rotation that reduces the tight sleeve of pincers (60) and the many possible mode that reduces the degree of rotation of the tight sleeve of pincers (60) are arranged.A kind of such method is the keyway locking, and the key that wherein adjoins each other is set on each tubular engaging surface.In the most basic configuration, convex parts 38 is set on the internal surface of outer tubular part (30) of main body (20), and bump (78) is set on the outer surface of the tight sleeve annular portion of pincers (62), so that convex parts (38) is cooperated mutually with bump (78) and is adjacent to each other with certain position in rotation, make the rotation of the tight sleeve of pincers (60) be limited to and be 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 making 3 convex partss (38) of equidistantly distributing around the internal surface of the outer tubular part of main body against the single bump (78) on the outer surface of the annular portion (62) of the tight sleeve of pincers, limit rotation can be arrived less than 1/3rd, though undoubtedly also can realize this against 3 convex partss (38) by making 3 bumps (78).

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

Another mode of execution of the tight sleeve of pincers 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 the tight sleeve of pincers (60), make it can be inserted in the main body, convex parts (38) complementally is placed in the keyway (77).If convex parts (38) is designed to enough narrow, in case in keyway (77), convex parts (38) can slide in the width of keyway (77), thereby allows in the tight sleeve of pincers (60) the tight sleeve 60 of pincers limited rotation in main body when being tightened.Because the limited rotation that is allowed to will help the surface of contact of O shape ring butt joint main body (20) and the tight sleeve of pincers to be used for better anti-fluid-tight, should not omit fully so rotate.

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

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

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

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

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

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

Another desirable feature of the tight sleeve of pincers (60) is that the end of the tight sheet of each pincers (64) is arranged to have by the angle of rounding and edge (65).Similarly, otch between the sheet or space are also preferably by rounding (67) or also be set to the U-shaped otch.This rounding at edge and angle will reduce these points carve or swipe 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 to adjacent part etc.U-shaped otch (67) between the tight sheet of pincers (64) by the situation at the angle of rounding in, this feature can reduce material breaks, because at coupling nut (80) when being tightened, insert by pipe end (10) and/or the tight sleeve of pincers around pipe end tighten and during causing stress sheet (64) be bent.

In another mode of execution or preferred distortion of the tight sleeve of pincers (60), the scope of U-shaped otch (67) also can change (quantity that depends on the tight sheet of pincers to be provided with (64)) between 3 otch or 4 otch, so that the degree of all the other width of annular portion (62) and otch is corresponding.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 the tight sheet of pincers (64) is provided during the insertion of pipe end (10).Figure 10 (F) demonstrates the example of the tight sleeve of this pincers (60) of the U-shaped otch (67) that is provided with intensity of variation.

For another feature that makes the easy crooked tight sleeve of pincers (60) that is provided with of the tight sheet of pincers (64) is, make the base portion attenuation of the tight sheet of locating at annular portion (62) of pincers (64), for example in Fig. 8 and Fig. 9 A, be illustrated as square groove (70).When pressurized internally (for example is inserted into when pipe end (10), when making sheet outwardly-bent) or during from outside pressurized (for example when coupling nut (80) be tightened when promoting the tight sheet of pincers and curve inwardly), this attenuation of material or reduce and will make the tight sheet of pincers (64) warpage or bending easily.In the latter since the aduncate degree of tightening the tight sheet of pincers (64) that institute's applied pressure causes by coupling nut (80) for the power that gives necessity 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 annular portion (62) end of the tight sleeve of pincers (60), 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 Figure 10 A by rounding (72).Use the edge of this rounding, the incidence rate of scratching or damage the seal ring surface via abrasive acrion when the tight sleeve of pincers (60) is rotated and/or inwardly pushed in the 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 may and be prevented that by the circumferential lip of rounding (73) edge (72) is directly more effective during the contact seal ring at the contiguous seal ring, though edge (72) can be by rounding.Can come this abutment surface (66) is done further improvement by the circumferential lip that the protuberance with recessed surface (74) as shown in Figure 10 C is set by rounding.By recessed profile is conformed to the surface of seal ring, the recessed surface by rounding of protuberance will guarantee that the complementally relative seating surface on the side of the tight sleeve of pincers 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 the tight sleeve of pincers (66) is the recessed surface of circumference (75) to be set profile is processed into the inner section or the lower section of the section (42) that covers seal ring (40), as shown in Figure 10 D.Should be understood that speech " bottom " is relative term because the supposition seal ring is placed on the horizontal plane, and the tight sleeve of pincers is inserted in the tube-shaped main body (20) of vertical orientation and from the bottom near seal ring.Another perspective view of this mode of execution can be described to be provided with the recessed surface of circumference (75) with around the interior quadrant down that profile is processed into the surface that covers the seal ring (40) in the cross sectional view.

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

Therefore, should note, the abutment surface (66) of the tight sleeve of pincers (60) can have many variations aspect profile and the profile, with the effective adjacency and the compressive surfaces of polymeric seal ring that the elastic property in the annular surface that is positioned in tubular ring (20) (32) is provided.What solve on the other hand " is placed " about the phrase that uses when mentioning seal ring.This phrase is used to indication adjacency rather than in fact be placed when (or by hanged) when being placed on the position in, in fact is placed in the position in its annular surface (32) in tube-shaped main body (20) so that the actual placement of seal ring for example is not limited to assembly process in advance at 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 the tight sleeve of pincers (60) can outwards be tapered a little (79), so that seal ring abuts against 3 different contact surfaces of junction point easily, that is, supporting the annular surface (32) of tube-shaped main body, the abutment surface (66) of the tight sleeve of pincers and the surface of pipe end (12).Can notice that this gradually thin being provided with of part 79 can be outside or inside, and is optional under any appearance of situation below or the adopted situation of advantage.

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

The last basic element of character of the pipe connector that is described is coupling nut (80), and it is described in Figure 12 A in Figure 11 and with cross sectional view jointly with external view.A preferable 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) the internal thread (82) along it rotate and tightening nut to provide when cooperating to the reinforcement of coupling nut structure and to the clamping of user's hand or instrument with the outside thread (34) of tube-shaped main body (20).

Another of coupling nut (80) is characterised in that outer opening (86), and wherein its edge is provided with the peripheral flange (87) that extends internally.When nut is tightened so that the tight sheet of pincers when upcountry shrinking all the other diameters of outer opening (86) simultaneously and still be enough to allow pipe end to have specified diameter to the specific tube coupling assembly around pipe end, the end maintenance that the width of this flange (87) will be enough to make the tight sheet of pincers (64) within it.Though 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 outer opening (86) around its antelabium is preferred.

Another complementary features of the coupling nut (80) of 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, along the crest of the internal thread of coupling nut one or more pits (89) can be set, so that in the screw thread that is tightened between two co-operating screw threads, projection (29) can be positioned in the pit (89) closely, avoids thread looseness thus.The joint of this projection in pit is similar to the joint of tongue in groove because feature can be arranged between the 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.Because this optional configuration in brains, so we carry out following description, and are not limited to 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) rotated above the place of tightening and falls in the pit (89) closely, the setting of pit (89) can cause click.Along the screw thread of tightening a plurality of pits (89) can be set, can indicate different engagement positios so that engage the corresponding click that each pit produces continuously by projection.For example, but the position that the first click clatter indicator tube joiner is pre-assembled and prepare for the insertion of pipe end, and the indication coupling nut of click clatter subsequently (80) is tightened in the top of the tight sleeve of pincers (60).

As preferred embodiment, pit is not set on the screw thread, but the screwed portion of screw thread alternatively is set to the crest of attenuation, so that the pit of tightening distortion of end place and generation correspondence thus of tightening the projection stroke of crest on crest that will make projection make attenuation of nut couplings.

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 to be shown as on the pipe end surface pincers tight for barb.

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

Though the concrete and exemplary feature of each parts of managing coupling assembly is at length contained in aforementioned description, but obviously many aforementioned features can be used as optional configuration and are reconfigured, replace, change or be provided with for the technician, but still use identical universal, function or working principle.These variations of specifically not mentioned in this article, replacement 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 literal of following claim.

Claims

1. pipe connector comprises:

Main body (20), it has tube-shaped catheter, is used to make fluid can pass it and flows at least the second opening (26) from first opening (24), and at least one in the wherein said opening is provided with:

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

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

Outside thread (34);

Seal ring (40), its diameter make and are suitable for:

Cooperate around described pipe end (10 or 12), and

Being positioned in described annular surface (32) locates;

The tight sleeve of pincers (60), it comprises:

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

The tight sheet of a plurality of pincers (64), it extends from the other end, wherein the internal surface of the tight sheet of each described pincers:

Be equipped with clamp device (68), and

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

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

2. pipe connector as claimed in claim 1, wherein

The internal surface of the described outer tubular part (30) of described main body (20) is provided with at least one convex parts (38), and

The outer surface of the annular portion (62) of the tight sleeve of described pincers is provided with at least one bump (78),

In cooperating mutually, the rotation of the tight sleeve of described pincers 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, equidistantly is 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, equidistantly is provided with 3 bumps (78) each other along the described outer surface of the annular portion (62) of the tight sleeve of described pincers.

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

8. pipe connector as claimed in claim 1, wherein

The outer surface of the annular portion (62) of the tight sleeve of described pincers is provided with at least one keyway (77),

Thus, described convex parts (38) can be inserted in the described keyway (77) and with the limit rotation of the tight sleeve of described pincers 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 the tight sleeve of described pincers equidistantly is provided with 6 keyways (77) each other, and wherein is provided with 3 convex partss (38) to be inserted in the corresponding keyway (77) in the complimentary positions on described main body (20).

11. pipe connector as claimed in claim 10, wherein, described convex parts (38) is enough narrow to slide in keyway (77) with permission limitedly, so that the rotation of the tight sleeve of pincers (60) in described main body (20) correspondingly is limited.

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

13. pipe connector as claimed in claim 12, wherein, when described coupling nut (80) when tightening, because the internal surface institute applied pressure of described coupling nut (80), the tight sheet of described pincers (64) is curved inwardly, and makes described barbed edge be clamped in securely on the surface of described pipe end.

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

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

16. pipe connector as claimed in claim 12, wherein, the tight sheet of described pincers (64) is separated from one another by the U-shaped otch.

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

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

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

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

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

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

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

24. pipe connector as claimed in claim 22, wherein, the inner opening of the annular portion of the tight sleeve of described pincers (60) comprises gradually thin part (79).

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

26. pipe connector as claimed in claim 25, wherein, the edge of described outer opening end (86) is provided with the peripheral flange (87) that extends internally, thus described coupling nut (80) be rotated the end that makes the tight sheet of pincers (64) when tightening remain on described outside in the opening (86), and all the other diameters of wherein said outer opening (86) are enough to make pipe end to pass it to be inserted into.

27. pipe connector as claimed in claim 26, wherein, described peripheral flange (87) outside described the opening edge around be continuous, form antelabium around described outer opening (86).

28. pipe connector as claimed in claim 1 wherein, is 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 connector as claimed in claim 1 wherein, is provided with at least one pit complementary with described projection (29) along the crest of the internal thread (82) of described coupling nut.

30., wherein, be provided with a plurality of pits (89) along the crest of the internal thread (82) of described coupling nut as each described pipe connector among the claim 28-29.

31. pipe connector as claimed in claim 30, wherein, described projection (29) is set at around the screwed portion second from the bottom of described crest.

32. pipe connector as claimed in claim 31 wherein, is provided with another group projection (29) on the screw thread on the opposite side.

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

34. pipe connector as claimed in claim 33 wherein, describedly is bonded on the distortion that causes described complementary threads when tightening.

35. pipe connector as claimed in claim 1, wherein, a plurality of ribs (27) that the interior barrel portion (28) of described main body is provided with in fact in described barrel portion (28) longitudinal extension and barrel portion (28) distributes symmetrically in described.

36. pipe connector as claimed in claim 35, wherein, described a plurality of ribs (27) are become to provide around the steadily cooperation closely that can insert pipe end (10) wherein by copying.

37. one kind is used for the tight sleeve of pincers (60) that uses at pipe connector, has according to any one or combined feature among the claim 12-24.

38. one kind is used for the main body (20) used at pipe connector, has according to any one or combined feature among the claim 2-7.

39. one kind is used for the coupling nut (80) that uses at pipe connector, has according to any one or combined feature among the claim 25-36.

40. pipe connector, comprise and being pre-assembled so that pipe end (10) inserts tube-shaped main body (20), the tight sleeve of pincers (60), seal ring (40) and coupling nut (80) wherein, wherein, at least one in described tube-shaped main body (20), the tight sleeve of pincers (60) or the coupling nut (80) is any one or the combination according to claim 2-36.