CN1165701C

CN1165701C - Pipe joint

Info

Publication number: CN1165701C
Application number: CNB991181514A
Authority: CN
Inventors: 井上智史; 司; 阪谷广司
Original assignee: Higashio Kikai K K
Current assignee: Higashio Kikai K K
Priority date: 1999-08-26
Filing date: 1999-08-26
Publication date: 2004-09-08
Anticipated expiration: 2019-08-26
Also published as: CN1286368A

Abstract

The present invention relates to a pipe joint which comprises a joint body (1), cylindrical retainer (2) and a plurality of small disc continua (31), wherein the joint body (1) has a cone-shaped internal thread part (6a) on the opening end; the cylindrical retainer (2) has an external thread part (7); the external thread part (7) can be screwed in the cone-shaped internal thread part (6a); each small disc continuum (31) is composed of two or three small discs (4); the small disc continua are embedded along screw threads arranged on the external thread part (7) of the retainer (2), and are used for connecting pipelines; one part of the small discs is projected out from the side of a circumference surface, and the other part of the small discs (4) is projected out from an internal circumference surface (8).

Description

Pipe joint

Technical field

The present invention relates to a kind of pipe joint.

Background technique

The pipe joint of common employing is that an end car of an adapter is cut into the male thread portion of a taper traditionally, and the female thread portion of pipe joint is twisted and to be connected on the outside thread that institute's car is cut into.

Yet, if use this pipe joint, when very little and joint part is very big or L-shaped when the working site, will often cause joint part not to be rotated, joint part can not be tightened take over, operation is inconvenience very.If take over the very thin thickness (for example copper pipe) of wall, will make externally threaded car cut become very difficulty or may not carry out this externally threaded car and cut operation of operation, thereby can cause this pipe joint to have to have the complicated mechanical linkage structure.

Summary of the invention

Therefore, send out purpose and just provide a kind of pipe joint simple in structure for one of the present invention, this pipe joint makes also can realize processing ease in very little working site, connect rapidly, being connected firmly of adapter, and coupled condition is stable and can be not loose.

For this reason, the invention provides a kind of pipe joint, comprising: a joint part that has conical internal thread part at an opening end; Cylindrical shape retainer with a male thread portion, male thread portion wherein can be screwed in the conical internal thread part; A plurality of roundel continuuies, each roundel continuum constitutes by two or three roundels, these roundel continuuies are embedded into along the screw thread on the male thread portion of retainer, be used for pipeline is connected, the part of roundel is side-prominent to a circumferential surface of retainer, and roundel another part is outstanding from an inner circular side face of retainer.

The present invention also further provides a kind of pipe joint, comprising: a joint part begins to be provided with successively a conical internal thread part and a parallel female thread portion from an opening end of this joint part; Cylindrical shape retainer with a male thread portion, male thread portion wherein can be screwed in described conical internal thread part and the described parallel female thread portion; A plurality of roundel continuuies, each roundel continuum constitutes by two or three roundels, these roundel continuuies are embedded into along the screw thread on the male thread portion of retainer, be used for pipeline is connected, the part of roundel is side-prominent to a circumferential surface of retainer, and roundel another part is outstanding from an inner circular side face of retainer.

Description of drawings

Below with reference to accompanying drawings, present invention is described.In these accompanying drawings,

Fig. 1 is the half-sectional view of pipe joint major component, expression a preferred embodiment of the present invention;

Fig. 2 A is the schematic representation of a roundel continuum;

Fig. 2 B is the schematic representation of this roundel continuum;

Fig. 3 A is a work schematic representation, the state when expression is pressed into this roundel continuum in the hole of retainer;

Fig. 3 B is a work schematic representation, the state when expression has been pressed into this roundel continuum in the hole of retainer;

Fig. 4 is the front sectional elevation of pipe joint major component, the coupled condition of expression pipe joint;

Fig. 5 is the work schematic representation of a roundel continuum;

Fig. 6 is the work schematic representation of a roundel continuum;

Fig. 7 A is the work schematic representation of a roundel continuum;

Fig. 7 B is the work schematic representation of a roundel continuum;

Fig. 8 is the side cutaway view of retainer;

Fig. 9 represents another embodiment's of pipe joint a half-sectional view of major component;

Figure 10 A is another embodiment's of expression roundel continuum a front elevation;

Figure 10 B is another embodiment's of expression roundel continuum a front elevation;

Figure 10 C is another embodiment's of expression roundel continuum a front elevation;

Embodiment

With reference to these accompanying drawings the preferred embodiments of the present invention are described below.

Fig. 1 represents a preferred embodiment of the present invention.This pipe joint has: a joint part 1, this joint part have a female thread portion 6, are provided with the internal thread 6a of a taper on the female thread portion of opening end; A cylindrical shape retainer 2 has one (taper) male thread portion 7, and this male thread portion 7 can be screwed in the female thread portion 6 (the female thread portion 6a of taper) of joint part 1; And Sealing 3.Retainer 2 has a plurality of roundel continuuies 31, each roundel continuum all is made up of two or three roundels that are used for fixing 4, these roundels are embedded in the outside thread 7, make that the part of roundel 4 is outstanding from a circumference side along the screw thread on the male thread portion 7, another part of roundel 4 is then outstanding from inner peripheral surface 8.

More particularly, this circle tube joint part 1 is from its opening end, is provided with successively along the direction of its axis K: female thread portion 6; The parallel portion 9 of a sealing usefulness; A first step part 10; One takes over insertion portion 11; A second step part 12; And pipe hole 13.Wherein first step part 10 is made into circle, and places a seal ring 3 between this first step part 10 and parallel portion 9.

The retainer 2 that is made of plastics is provided with outside thread 7 on the circumferential surface of cylindrical shape part 14, and on the base portion of cylindrical shape part 14, be provided with one polygonal outside bead part 15.

In addition, as shown in Figure 2, roundel continuum 31 is made of two interconnective roundels 4.This roundel 4 is made by metal (for example hard steel or stainless steel), and shown in Fig. 2 A, its front elevation is Hexagon, and its side view is rounded by shown in Fig. 2 B.The external structure of roundel 4 is the abacus bead structure, has a pointed circumferential edges 18 and from 18 liang of side-prominent circular flat parts 20 of this circumferential edges.Roundel continuum 31 is by fixed with each other formation of circular flat 20 parts of two roundels 4.

As depicted in figs. 1 and 2, along in the longitudinal sectional drawing of the axis K of joint part 1, it is identical substantially with the structure of the edge section 17 of male thread portion 7 that the cross-section structure of the outside tip part 16 of the roundel 4 of roundel continuum 31 is made into.That is to say, the angle θ of the outside tip part 16 of roundel 4 is made into the thread angle (angle of the tip part 17a of edge section 17) of male thread portion 7 roughly the same, and this outside tip part 16 constitutes the part of the tip part 17a of edge section 17.Roundel continuum 31 is made into and can be screwed on the female thread portion 6 that is positioned at the joint part 1 between continuous a plurality of (two) roundel 4.Thereby can keep the intensity that is threaded between retainer 2 and the joint part 1.

As shown in figures 1 and 3, in the retainer 2 that is made of plastics, in the mold process, make many holes 19 that are used to inlay roundel continuum 31, can be pressed into metal roundel continuum 31 in each hole 19 by the crimping mode.

More specifically describe, the hole 19 of retainer 2 has an outside opening 28 and an inside opening 29, outside opening 28 wherein is used to make the outside tip part 16 of the roundel continuum 31 on the circumferential surface to stretch out from this outside opening 28, and inside opening 29 is used to make the inboard tip part 25 on the inner peripheral surface to stretch out from this inside opening 29.The inside in hole 19 is made into wideer than outside opening 28 and inside opening 29, thereby hole 19 is looped around around (above-mentioned) circular flat part 20 of roundel continuum 31.Outside opening 28 is wideer than inside opening 29, and edge of opening 21 is fillets.

Fig. 3 A represents roundel continuum 31 is pressed into hole 19 state before of retainer 2.Roundel continuum 31 is from outside opening 28 side pressure hand-holes 19, and outside opening increases owing to plastics deform, and the circular flat part 20 of roundel continuum 31 slips over from edge of opening 21, and is embedded into the inside in hole 19, shown in Fig. 3 B.In roundel continuum 31 embedded holes 19, and can rotate around the central axis P that passes circular flat part 20.

Link to each other for pipe joint of the present invention and is taken over 5, as shown in Figure 1, an end of adapter 5 passes the hole of retainer 2, and inserts the insertion portion of taking over 11, when an end face 26 of taking over 5 contacts with second step part 12, takes over 5 and has been positioned.At this moment, the inner passage of adapter 5 just links to each other with the pipe hole 13 of joint part 1.In addition, also on the inner peripheral surface 8 of retainer 2 and male thread portion 7, be coated with in advance the fluid sealant of some viscosity, be used between retainer 2 and the joint part 1 and retainer 2 and take over 5 between strictly seal, thereby can prevent oozing out of sealing, prevent the electro erosion of piping connection portion.

The male thread portion 7 of retainer 2 is screwed onto on the female thread portion 6 of joint part 1, and retainer 2 is screwed at the female thread portion 6 of joint part 1 and takes over gap between 5, contacts with joint part 1 up to an end face of outer bead 15, as shown in Figure 4.

In this example, slide in female thread portion 6 by outside tip part 16, can prevent the dislocation of roundel continuum 31, therefore the inner peripheral surface 8 outstanding inboard tip parts 25 from retainer 2 are engaged on the circumferential surface 22 of adapter 5 surely with regard to one.More particularly, in these roundel continuuies 31, the inboard tip part 25 of the circumferential edges 18 of (being arranged on from joint part 1 side nearest) first roundel continuum 31 is screwed into along with retainer 2 and little by little nips and take in 5 the circumferential surface 22, and forms spiral interlock track 23.If there is a little prominent face portion of interrupting on circumferential surface 22, roundel continuum 31 just can pass through from this little prominent face, therefore keeps 2 can be screwed onto terminal smoothly in the same old way.

The circumferential edges 18 of second and roundel continuum 31 subsequently inboard most advanced and sophisticated 25 along the front formed interlock track 23 advance (or sting on these circumferential surfacies and advance), and be combined on these interlock tracks 23.That is to say that roundel continuum 31 is nipped and taken in 5.As mentioned above, nip by a plurality of roundel continuuies 31 and to take in 5 the circumferential surface 22, just can fix by firm butt tube 5.

One end 24 of retainer 2 Sealing 3 towards the extruding of first step part 10 sides of joint part 1, thereby by joint part 1, take over 5 and retainer 2 center on and the gap that forms by closure securely, so the generation of fluid seepage when having prevented use.Because Sealing is suitably pushed, by tightening retainer 2, contact with joint part 1 up to outside bead part 15, at this moment, the roundel continuum 31 of male thread portion 7 just is screwed into female thread portion 6, and nips dearly and take in 5, therefore, whether the operator can estimate screw thread and connect accurately, and can promptly carry out attended operation.

As shown in Figure 5, be in the state that is connected fully with a kind of of joint part 1 at retainer 2, when pulling force acts in the adapter 5 along arrow G 1 direction (leaving the direction of joint part 1), will produce a resistance F1 at outside tip part 36 places (from the nearest position of the opening end of joint part 1) of the outside of roundel continuum 31, and produce a resistance F2 at inboard tip part 35 places (promptly from the nearest position of the penetrale of joint part 1) of the inside of roundel continuum 31, so further strengthened taking over 5 join strength.

Specifically, at roundel continuum 31 with joint part 1 and take under 5 states that interconnect, when pulling force was being taken on 5 along arrow G 1 directive effect, will form an outside tip part 36 with the outside on the direction of arrow R1 was the rotatory force at center.That is to say, form the resistance F1 of butt joint part 1 on the outside tip part 36 externally, and butt tube 5 forms a resistance F2 on the inboard tip part 35 of inside, and the action direction of F2 is the dotted line L1 direction along the inboard tip part 35 that passes outside outside tip part 36 and inside.Therefore, make the inner inboard tip part 35 interlock track 23 of further nipping.

Therefore, the pulling force of butt tube 5 is big more, and the snap-in force of inboard tip part 35 butt tubes 5 of roundel continuum 31 inside is just big more, thereby makes the join strength of adapter 5 further strengthen.So roundel continuum 31 just can keep its steady state.

As shown in Figure 6, roundel continuum 31 can be made up of three roundels 4, (see figure 4) under retainer 2 and state that joint part 1 is connected fully, this roundel continuum of being made up of three roundels 4 31 is bigger than the join strength of the roundel continuum of being made up of two roundels 4 31 (as shown in Figure 5).That is to say, when pulling force acts in the adapter 5 along arrow G 2 directions (leaving the direction of joint part 1), will form a resistance F3 in (nearest) outside outside tip part 36 places in the outside of roundel continuum 31 tip part 16, and (nearest from joint part 1 inner terminal) in the inboard tip part 25 of roundel continuum 31 inner inboard tip part 35 places form a resistance F4 from joint part 1 opening end.

Specifically, at roundel continuum 31 with joint part 1 and take under 5 states that interconnect, when pulling force was being taken on 5 along arrow G 2 directive effects, will form an outside tip part 36 with the outside on the direction of arrow R2 was the rotatory force at center.That is to say, form the resistance F3 of butt joint part 1 on the outside tip part 36 externally, and butt tube 5 forms a resistance F4 on the inboard tip part 35 of inside, and the action direction of F4 is the dotted line L2 direction along the inboard tip part 35 that passes outside outside tip part 36 and inside.Therefore, make the inner inboard tip part 35 interlock track 23 of further nipping.

In addition, with the outside tip part 36 of roundel continuum 31 outsides the radius of gyration (with reference to Fig. 5) of the radius of gyration that rotates along arrow R2 direction (distance between the inboard tip part 35 of outside outside tip part 36 and inside) greater than the time at center by two roundels with three roundels 4, therefore, inner inboard tip part 35 is with regard in the interlock track 23 of deeper nipping.In addition, owing to the dotted line L2 in three roundels 4 is less than two pairing inclination angles of dotted line L1 (with reference to Fig. 5) in the roundel 4 with respect to the inclination angle of taking over 5, therefore, F3 and F4 in three roundels 4 are greater than two F1 and F2 in the roundel 4, thereby make that taking over 5 connection becomes more firm.

If roundel continuum 31 is to be made of a roundel 4, shown in Fig. 7 A, so, (see figure 4) under roundel continuum 31 and state that joint part 1 is connected fully, when pulling force acts on along arrow G 3 directions (leaving the direction of joint part 1) when taking on 5, be that the rotatory force along arrow R3 at center just acts on the roundel continuum 31 with outside tip part 16.Because formed resistance is very little on outside tip part 16 and inboard tip part 25, thereby makes this roundel continuum 31 topple over, and inboard tip part 25 detaches interlock track 23, shown in Fig. 7 B.Therefore, be difficult to this roundel continuum of only being made up of a roundel 4 31 is maintained a stable position, take over 5 and also be separated from easily.

On the other hand, if roundel continuum 31 is made of four or more a plurality of roundel 4, not shown this situation take over 5 connection this moment and will become more firm, and roundel continuum 31 can more stably maintain a stable position.Yet, adopting four or more a plurality of roundel 4 to constitute this roundel continuum 31 is not optimized technical scheme, because be difficult to this roundel continuum 31 is connected on the retainer 2, and can make the weakened of (plastic) retainer 2, cost uprises.Therefore, this roundel continuum 31 preferably is made of two or three roundels 4.

With predetermined spacing 6 to 12 roundel continuum Unit 31 are set on the circumferencial direction of retainer 2, each unit is configured to mutual aspectant setting, so that fixing adapter 5 makes it not off-axis K.

Specifically, as shown in Figure 8, in the sectional drawing perpendicular to the axis K of retainer 2, two roundel continuuies 31 are set on the plane perpendicular to retainer 2 axis K, and the direction along axis K is looked, and these two roundel continuuies 31 are in 180 degree and are provided with Face to face.In these eight roundel continuuies 31, each all is provided with on plane, ground mutually Face to face to roundel continuum 31.

Therefore, as shown in Figure 4, when joint part 1, retainer 2 and take over 5 when being in complete coupled condition, it is very stable that joint will become, and can be not loose.

In addition, in Fig. 9, expressed another embodiment of pipe joint among the present invention.This pipe joint has: a joint part 1 that has female thread portion 6 in this joint part 1, from an opening end of female thread portion 6, is provided with the conical internal thread part 6a female thread portion 6b parallel with successively; A columnar retainer 2 that has one (taper) male thread portion 7, male thread portion 7 wherein can be screwed in the female thread portion 6 of joint part 1; And Sealing 3.Retainer 2 has many roundel continuuies 31, each roundel continuum 31 is to be made of two or three roundels 4, these roundel continuuies 31 are used for pipeline is connected and fixed, they are embedded in the male thread portion 7, the part of roundel continuum 31 is outstanding along male thread portion 7 from a circumferential surface, and another part is then outstanding from inner peripheral surface 8.

In (as shown in Figure 4) complete coupled condition, by being screwed into, retainer 2 come butt tube 5 to connect in the joint part 1, and (all) roundels continuum 31 is screwed in the parallel female thread portion 6b.

Therefore, roundel continuum 31 is nipped and is taken over 5 the degree of depth uniformity always of nipping, thereby makes pulling force become stable, and makes pulling force reach an enough numerical value, thereby can make to connect and keep stable.

Other embodiment who in Figure 10, has represented roundel continuum 31.Roundel continuum 31 shown in Figure 10 A and Figure 10 B is so, promptly the circumferential edges 18 of these roundels 4 and (circular flat part 20) attachment portion around be configured to fillet.Therefore, compare with the roundel continuum 31 shown in Fig. 2, this continuum 31 firmly and relaxes, and very big resistance is arranged, thereby makes connection more firm.

Roundel continuum 31 shown in Figure 10 B is round than 31 jiaos of roundel continuuies shown in Figure 10 A, it is more stable, more firm to connect.

Roundel continuum 31 shown in Figure 10 C is so, and promptly each end of roundel continuum 31 all has the tip part 27 of a protuberance, and the tip part 27 of this protuberance is tapered, and it swells laterally from circumferential edges 18.Therefore, compare the roundel continuum 31 just easier rotations in the embedding retainer 2 here around axis P with the roundel continuum 31 shown in Fig. 2.

(as shown in Figure 1) the female thread portion 6a of taper and male thread portion 7, or the female thread portion 6a of (as shown in Figure 9) taper, parallel female thread portion 6b and male thread portion 7 all can be made double thread screw.These roundel continuuies 31 are nipped equably and are taken in the whole circumference faces of 5 360 degree, thereby make and connect stablely and lax, connect more firm.Pitch can also be strengthened, thereby makes that only needing a spot of rotation just can finish fastening (connection) operates.In order to realize just finishing the purpose of attended operation, also can adopt the structure of three screw threads by rotation still less.

The present invention is not limited to embodiment described above, for example, can come roundel continuum 31 is embedded in the maintenance body 2 with the method for plastics insert moulding.Roundel continuum 31 can be made of stupalith.

Pipe joint in according to the present invention, a plurality of roundel continuuies 31 are outstanding from the inner circular side face of retainer 2, and in the circumferential surface 22 of the adapter 5 of nipping, by in the female thread portion 6a that the outside thread of retainer 2 is screwed into the conical internal thread part 6a of joint part 1 or is screwed into taper and the parallel female thread portion 6b, take over 5 and interconnect with joint part 1 thereby make.This pipe joint structure is simple, and can be connected to securely on the joint part 1 taking over 5, and also can carry out attended operation easily, apace in very little working site.In addition, this roundel continuum 31 that is made of two or three roundels 4 can also stably connect and can be not loose, thereby makes the connection of adapter 5 become firmly stable more.

Pipe joint in according to the present invention, owing to finish connection on the parallel female thread portion 6b by roundel continuum 31 is tightened to, therefore, make roundel continuum 31 nip to take over the degree of depth uniformity always of 5 circumferential surfacies, thereby make pulling force stable, and this pulling force can reach an enough numerical value, keeps stable thereby can make to connect.

Because conical internal thread part 6a, parallel female thread portion 6b and outside thread 7 all are double thread screws, therefore, only need a spot of rotation just can easily finish fastening (connection) operation rapidly.

In addition, take in the circumferential surface of whole 360 degree, thereby make connection stable, lax, connect more firm because roundel continuum 31 is nipped.

Because in design of the present invention and essential features scope, can make various changes to the present invention, therefore, although in this manual the preferred embodiments of the present invention are described, but, can know clearly that these descriptions are descriptive, be not to limit the invention.

Claims

1, a kind of pipe joint comprises: a joint part (1) that has conical internal thread part (6a) at an opening end; Cylindrical shape retainer (2) with male thread portion (7), male thread portion wherein (7) can be screwed in the conical internal thread part (6a); A plurality of roundel continuuies (31), each roundel continuum (31) constitutes by two or three roundels (4), these roundel continuuies are embedded into along the screw thread on the male thread portion (7) of retainer (2), be used for pipeline is connected, the part of roundel (4) is side-prominent to a circumferential surface of retainer (2), and roundel (4) another part is outstanding from an inner circular side face (8) of retainer (2).

2, a kind of pipe joint comprises: a joint part (1) begins to be provided with successively conical internal thread part (6a) and a parallel female thread portion (6b) from the opening end of this joint part (1); Cylindrical shape retainer (2) with male thread portion (7), male thread portion wherein (7) can be screwed in described conical internal thread part (6a) and the described parallel female thread portion (6b); A plurality of roundel continuuies (31), each roundel continuum (31) constitutes by two or three roundels (4), these roundel continuuies are embedded into along the screw thread on the male thread portion (7) of retainer (2), be used for pipeline is connected, the part of roundel (4) is side-prominent to a circumferential surface of retainer (2), and roundel (4) another part is outstanding from an inner circular side face (8) of retainer (2).

3, pipe joint according to claim 2 is characterized in that retainer (2) has been screwed in the joint part (1) under the state that connects fully, and the continuous main body of roundel (31) is screwed into parallel female thread portion (6b).

4, pipe joint according to claim 1 is characterized in that the female thread portion (6a) of taper and male thread portion (7) all are double thread screws.

5,, it is characterized in that the female thread portion (6a) of taper, parallel female thread portion (6b) and male thread portion (7) all are double thread screws according to claim 2 or 3 described pipe joints.

6, according to claim 1,2,3 or 4 described pipe joints, it is characterized in that two roundel continuuies (31) are set on the plane perpendicular to axis (K), direction along the axis (K) of pipe joint is looked, and these two roundel continuuies (31) become 180 degree to be provided with relatively.

7, pipe joint according to claim 5, it is characterized in that two roundel continuuies (31) are set on the plane perpendicular to axis (K), direction along the axis (K) of pipe joint is looked, and these two roundel continuuies (31) become 180 degree to be provided with relatively.