CN105637274A

CN105637274A - Pipe fitting

Info

Publication number: CN105637274A
Application number: CN201480057036.1A
Authority: CN
Inventors: 石井完
Original assignee: Bridgestone Corp
Current assignee: Bridgestone Corp
Priority date: 2013-10-17
Filing date: 2014-10-16
Publication date: 2016-06-01
Anticipated expiration: 2034-10-16
Also published as: TWI624612B; JP5818855B2; CN105637274B; TW201537078A; JP2015078749A; WO2015056764A1

Abstract

Provided is a pipe fitting capable of suppressing the accumulation of stress in the corner of an outer flange formed in a core, and guaranteeing axial strength of the outer flange. The accumulation of stress in the corner when external force acts in a direction intersecting the axial direction can be suppressed by forming a concave arcuate first inclined surface (52) in the corner, which is formed by an outer flange (50) and the outer peripheral surface of a resin core (14). A second inclined surface (64) that comes in contact with the first inclined surface (52) is provided to an inner flange (60) of a metal cap nut (54); when the cap nut (54) is tightened, a second side wall surface (61) of the inner flange (60) is brought in contact with a first side wall surface (51) of the outer flange (50), and the second inclined surface (64) is brought in contact with the first inclined surface (52) of the resin core (14). The contact surface area between the inner flange (60) and the outer flange (50) can be increased, and the axial strength of the outer flange (50) can be guaranteed.

Description

Pipe joint

Technical field

The present invention relates to a kind of pipe joint.

Background technology

Pipe joint is employed when pipe being connected to the nipple etc. of machine. As this pipe joint, there is union adaptor (Japanese: �� Application hands) (for example, referring to patent documentation 1). Union adaptor is configured to include the core of tubular that is connected with nipple and for core is fixed on the acorn nut of nipple.

Union adaptor by being tightened to the external screw thread of nipple by union nut, so that the inward flange of acorn nut presses the outward flange of core to nipple thruster, outward flange is clamped and fixed between inward flange and nipple.

Being provided with side wall surface orthogonal to the axial direction in the inward flange side of outward flange, be provided with the side wall surface relative with the side wall surface of outward flange in the outward flange side of inward flange, when tightening acorn nut, the side wall surface of outward flange is subject to the pushing force of the side wall surface from inward flange.

Prior art literature

Patent documentation

Patent documentation 1: 2005-No. 114001 publications of Japanese Unexamined Patent Publication

Summary of the invention

The problem that invention to solve

, union adaptor is clamped and fixed between the inward flange of acorn nut and nipple due to outward flange, and therefore when the External Force Acting in direction intersecting axially is in core, stress concentrates on the corner of outward flange. When core is synthetic resin, it is contemplated that durability, stress is suppressed to concentrate better as much as possible.

In order to suppress this stress to concentrate, general consideration forms arc surface in the corner of outward flange. But, when considering stress to concentrate and to increase arc surface, exist and bear the tendency that the side wall surface of outward flange of the pushing force from inward flange diminishes, the contact area between inward flange and outward flange diminishes and pushing force concentrates on the part of outward flange, therefore the axial intensity of outward flange reduces.

It is intended to the contact area guaranteeing between inward flange and outward flange, it is also considered that make outward flange and acorn nut maximize, but the size-enlargement of joint, and cost also rises. It addition, when reducing the diameter of core when the contact area being intended to guarantee between inward flange and outward flange, the internal diameter of core reduces, and causes flow-reduction.

The present invention considers the above-mentioned fact, though its object is to provide a kind of when being formed at the inclined plane that the corner of outward flange of core defines for suppressing stress to concentrate, can also ensure that the pipe joint of the axial intensity of outward flange.

For solving the scheme of problem

The pipe joint of the 1st technical scheme includes: core, and it is for synthetic resin system and is formed as cylindric, and longitudinally one end is connected to body; Outward flange, it is ring-type and the other end being formed at described core, and is radially oriented outside extension; Bearing surface, it is formed at described outward flange, and includes the 1st inclined plane, and the 1st inclined plane tilts relative to the outer peripheral face of described core when being located at the corner between described core and described outward flange and observe under cross section axially; And acorn nut, comprising: cylinder portion, it is formed with internal thread part; Inward flange, it is radially oriented inner side and highlights and have the hole run through for described core from the end of cartridge; And by bearing surface, itself and described bearing surface abut against, and this is included the corner being formed at described inward flange the 2nd inclined plane abutted against with described 1st inclined plane by bearing surface.

The pipe joint of the 1st technical scheme such as by configuring the containment member of ring-type and the internal thread part of acorn nut threadingly engaging in the external thread part of nipple and is anchored on the external thread part of nipple between nipple and the outward flange being formed at core, it is being located at the connecting portion place connection pipe body of core such that it is able to make body and nipple be connected with each other.

Additionally, owing to being formed with the bearing surface of the 1st inclined plane in the corner including being located at outward flange at the outward flange of adapter body, inward flange at acorn nut is provided with and includes the 2nd inclined plane that the 1st inclined plane with outward flange abuts against and the bearing surface with outward flange abuts against by bearing surface, therefore, it is possible to increase the contact area that inward flange contacts when fastening acorn nut with outward flange. Therefore, it is suppressed that the stress produced in the corner of outward flange is concentrated and ensure that the intensity in direction orthogonal to the axial direction of core, and is able to ensure that the axial intensity of outward flange.

It addition, inclined plane said here not only includes the inclined plane of the linearity tilted with constant angle, also include the inclined plane of the bending that angle of inclination gradually changes.

2nd technical scheme is in the pipe joint of the 1st technical scheme, and the radial dimension h of described 1st inclined plane is set to more than 40% relative to from the outer peripheral face of the described core radial dimension H along described outward flange radially to the outer peripheral face of described outward flange.

In the pipe joint of the 2nd technical scheme, owing to the radial dimension h of the 1st inclined plane sets for more than 40% relative to from the outer peripheral face of the core radial dimension H along outward flange radially to the outer peripheral face of outward flange, therefore, it is possible to effectively suppress effect on core to have the stress during external force in direction intersecting axially to concentrate.

3rd technical scheme is in the pipe joint of the 1st technical scheme or the 2nd technical scheme, and described 1st inclined plane is radius of curvature is the concaved circular cambered surface of r1, and described 2nd inclined plane is radius of curvature is the convex arc surface of r2, and is set as r1=r2.

In the pipe joint of the 3rd technical scheme, owing to the 1st inclined plane has been set to the concaved circular cambered surface that radius of curvature is r1,2nd inclined plane has been set to the convex arc surface that radius of curvature is r2, and set for r1=r2, therefore, it is possible to make the 1st inclined plane being formed as concaved circular cambered surface reliably abut against on whole with the 2nd inclined plane being formed as convex arc surface.

In the pipe joint of the 4th technical scheme any technology scheme in the 1st technical scheme��the 3rd technical scheme, described bearing surface has 1st side wall surface orthogonal with the outer peripheral face of described core, and described had the 2nd side wall surface abutted against with described 1st side wall surface by bearing surface.

In the pipe joint of the 4th technical scheme, bearing surface includes 1st side wall surface orthogonal with the outer peripheral face of core and is formed as the 1st inclined plane of concaved circular cambered surface, is included the 2nd side wall surface abutted against with the 1st side wall surface and the 2nd inclined plane abutted against with the 1st inclined plane by bearing surface.

Therefore, it is possible to make the 1st inclined plane and the 2nd inclined plane abut against, and the 1st side wall surface and the 2nd side wall surface can be made to abut against.

The effect of invention

Pipe joint as discussed above, according to the present invention, even if when being formed at the inclined plane that the corner of outward flange of core defines for suppressing stress to concentrate, it is also possible to guarantees the axial intensity of outward flange.

Accompanying drawing explanation

Fig. 1 indicate that the pipe joint of one embodiment of the present invention, along the sectional view of axis.

Fig. 2 A indicate that the state that the inward flange of acorn nut contacts with the outward flange of core, along the amplification view of axis.

Fig. 2 B indicate that the state that the inward flange of acorn nut separates with the outward flange of core, along the amplification view of axis.

Fig. 3 indicates that sectional view that be connected to the state of pitch tube and nipple on the pipe joint of one embodiment of the present invention, along axis.

Fig. 4 indicates that the bearing surface of the pipe joint of the 2nd embodiment and sectional view by bearing surface, along axis.

Fig. 5 indicates that the bearing surface of the pipe joint of the 3rd embodiment and sectional view by bearing surface, along axis.

Detailed description of the invention

[the 1st embodiment]

The pipe joint 10 of the 1st embodiment of the present invention is described according to accompanying drawing.

As it is shown in figure 1, the pipe joint 10 of present embodiment is configured to include adapter body 12 and acorn nut 54.

(adapter body)

Adapter body 12 includes core 14, sleeve 16, adapter ring 18, engaging releasing component 20, locking ring 24 and the O-ring seals 22 as leak-stopping component, and these components make mutual centre axis as one man configure. It addition, in the present embodiment, core 14, sleeve 16, adapter ring 18 and engaging release the formed products that component 20 is synthetic resin.

The side, arrow L direction of core 14 is formed as can to the core 26 being inserted into of the pitch tube P as connecting object. The outer peripheral face of this core 26 is formed a pair intercalation groove 28, in these intercalation grooves 28, has been respectively embedded into O-ring seals 22. When core 26 is inserted into pitch tube P, this O-ring seals 22 is close to the inner peripheral surface of pitch tube P, and seals between pitch tube P and core 14.

The side, arrow R direction of core 14 is formed as the large-diameter portion 30 formed in the way of diameter is more than the diameter of core 26, and at large-diameter portion 30 place, the boundary between core 26 has been formed about groove 32.

Adapter ring 18 is configured at the outside of the outer peripheral face of the side, arrow L direction of core 14.

The end of the side, arrow R direction of adapter ring 18 enters into the groove 32 of core 14 and is embedded in the groove 32 of core 14, and thus adapter ring 18 is fixed on core 14.

The insertion section 34 of the hollow cylinder surrounded by the inner peripheral surface of adapter ring 18, the outer peripheral face of core 26 and the end of large-diameter portion 30 is set so as to insert the size of certain size for the end portion of pitch tube P.

The outer peripheral face of the side, arrow R direction of adapter ring 18 is formed with the sleeve holding section 36 being formed as concavo-convex.

Sleeve 16 is shaped generally as tubular, and is configured at the outside of the outer peripheral face of the side, arrow L direction of adapter ring 18.

The inner peripheral surface of sleeve 16 is formed can be chimeric with sleeve holding section 36 in side, arrow L direction concavo-convex engaged part 38. Sleeve holding section 36 is embedded in this engaged part 38 and makes adapter ring 18 be fixed on sleeve 16.

It is sequentially formed with along with going towards arrow L direction and the 1st constant footpath portion 42 of rake 40 that internal diameter reduces, constant inner diameter and the internal diameter 2nd constant footpath portion 44 less than the internal diameter in the 1st constant footpath portion 42 by the position of side, arrow L direction in the ratio engaged part 38 of sleeve 16.

Locking ring 24 is arranged in the inner circumferential side of the rake 40 of sleeve 16 and is adapter ring 18 and the position engaging and releasing between component 20 described later. This locking ring 24 have at spaced intervals in the circumferential multiple to inner circumferential side prominent can the claw 24A of elastic deformation, be set to be slightly less than the external diameter of pitch tube P by the imaginary diameter of a circle of the top ends of this claw 24A.

Engaging releases component 20 and is formed as the internal diameter substantially tubular less times greater than the external diameter of pitch tube P, can be configured at the inner circumferential side of sleeve 16 along central axis K1 in the way of moving. This engaging releases component 20 and includes for pushing rake 46 and being positioned at the constant outer diameter portion 48 of the side, arrow L direction pushing rake 46 to arrow R direction thruster paw portion 24A.

Not coming off from sleeve 16 to make engaging release component 20, engaging releases the constant outer diameter portion 48 of component 20 and is formed as the external diameter internal diameter less than the 1st constant footpath portion 42 of sleeve 16, and external diameter is more than the internal diameter in the 2nd constant footpath portion 44.

As shown in Figure 1, Figure 2 shown in A and Fig. 2 B, it is formed with the outward flange 50 being radially oriented the ring-type that outside extends in the end in the arrow R direction of the large-diameter portion 30 of core 14.

As shown in Figure 2 B, it is formed with the 1st inclined plane 52 in the corner (base portion of outward flange 50) formed due to the outer peripheral face of large-diameter portion 30 and the 1st side wall surface 51 of outward flange 50.

With the orthogonal axe of core 14 when 1st side wall surface 51 of present embodiment is observed under the axial cross section along core 14. When 1st inclined plane 52 is observed under the axial cross section along core 14 in the radial outside of large-diameter portion 30 have the center of curvature, radius is the concave circular arc shape of r1, and is smoothly connected to outer peripheral face and the 1st side wall surface 51 of large-diameter portion 30.

It addition, the 1st side wall surface the 51 and the 1st inclined plane 52 of present embodiment is equivalent to the bearing surface of the present invention.

(acorn nut)

As shown in Figure 1, Figure 2 shown in A and Fig. 2 B, acorn nut 54 is formed by the hardware of hexa-prism. Axle center is formed with the 1st hole 56 from the end of side, arrow R direction towards side, arrow L direction, is formed with the internal diameter the 2nd hole 58 less than the internal diameter in the 1st hole 56 in the side, arrow L direction in the 1st hole 56. In the 1st hole 56, from the end of side, arrow R direction towards being formed with female thread 62 at the bottom of hole.

The internal diameter in the 1st hole 56 is set so as to the size inserted for the outward flange 50 of core 14. On the other hand, the internal diameter in the 2nd hole 58 is set to be less than the external diameter of the outward flange 50 of core 14 and the size of external diameter of the large-diameter portion 30 less times greater than core 14. Thus, acorn nut 54 can rotate against freely relative to core 14, and moves freely in the axial direction.

Be formed as being radially oriented from the inner surface in the 1st hole 56 inward flange 60 of the ring-type that inner side extends between end and the bottom in the 1st hole 56 of the side, arrow L direction of acorn nut 54.

With the orthogonal axe of acorn nut 54 when 2nd side wall surface 61 of the 1st side, hole 56 (side, arrow R direction) of inward flange 60 is observed under the axial cross section along acorn nut 54, relative with the 1st side wall surface 51 of outward flange 50 and can abut against with the 1st side wall surface 51.

It addition, the inner corner portion in the 1st side, hole 56 (side, arrow R direction) of inward flange 60 is formed with 2nd inclined plane 64 relative with the 1st inclined plane 52 of the core 14 being formed at adapter body 12. When 2nd inclined plane 64 is observed under cross section axially in the radially inner side of inward flange 60 have the center of curvature, radius be the convex arch shape of r2. In the present embodiment, the radius r2 of radius r1 and the 2 inclined plane 64 of the 1st inclined plane 52 is set to same size.

It addition, the 2nd side wall surface the 61 and the 2nd inclined plane 64 of present embodiment be equivalent to the present invention by bearing surface.

Thereby, it is possible to make the 2nd side wall surface 61 of inward flange 60 abut against with the 1st side wall surface 51 of outward flange 50, and the 2nd inclined plane 64 of inward flange 60 can be made to abut against with the 1st inclined plane 52 of outward flange 50.

(effect, effect)

Then, the using method of the pipe joint 10 of present embodiment is described.

First, pipe joint 10 is described and as the order of connection between the nipple 66 of the connecting object of side.

As it is shown in figure 1, configure the sealing member 68 of ring-type between outward flange 50 and the nipple 66 of the core 14 of pipe joint 10, the female thread 62 of acorn nut 54 is threadingly engaged in the external screw thread 70 of nipple 66 and fastens acorn nut 54.

By fastening acorn nut 54, thus pipe joint 10 is connected to nipple 66, as shown in Figure 2 A and 2 B, outward flange 50 and sealing member 68 are clamped between inward flange 60 and nipple 66.

Thus, the 2nd side wall surface 61 of inward flange 60 abuts against with the 1st side wall surface 51 of outward flange 50, and the 1st inclined plane 52 of the 2nd inclined plane 64 of inward flange 60 and outward flange 50 abuts against.

In the pipe joint 10 of present embodiment, the 1st inclined plane 52 of arc-shaped is defined, therefore, it is possible to suppress the stress that the power in direction intersecting axially produces in above-mentioned corner when acting on core 14 to concentrate in the corner formed due to the outer peripheral face of large-diameter portion 30 and the 1st side wall surface 51 of outward flange 50.

The external force that the power in direction intersecting axially such as refers to when the spanner of the tightening operation of the acorn nut 54 for carrying out other adjacent pipe joints 10 knocks etc., but can also be carried out other external force such as the external force that acts on when pitch tube P pulls.

Additionally, in order to effectively suppress above-mentioned stress to concentrate, as shown in Figure 2 B, by being set to H from the outer peripheral face of large-diameter portion 30 height dimension along radially measured outward flange 50 to the outer peripheral face of outward flange 50, by when being similarly set to h along the radial dimension of the 1st radially measured inclined plane 52, it is preferred that h to be set to more than the 40% of H.

Additionally, in the pipe joint 10 of present embodiment, owing to making the 2nd inclined plane 64 of inward flange 60 be connected to the 1st inclined plane 52 of outward flange 50, and the 2nd side wall surface 61 making inward flange 60 is connected to the 1st side wall surface 51 of outward flange 50, therefore, it is possible to the contact area increased between outward flange 50 and inward flange 60.

Therefore, although being formed with the 1st inclined plane 52 in the corner of outward flange 50, but when fastening acorn nut 54, the sidepiece entirety of inward flange side of outward flange 50 can be utilized to bear the pushing force of inward flange 60, pushing force will not concentrate on the local of outward flange 50, therefore, it is possible to guarantee the axial intensity of outward flange.

In the pipe joint 10 of present embodiment, owing to the 1st inclined plane the 52 and the 2nd inclined plane 64 has been set to simple arc-shaped, it is thus susceptible to form the 1st inclined plane the 52 and the 2nd inclined plane 64, the dimensional stability of the 1st inclined plane the 52 and the 2nd inclined plane 64 is also better, it is possible to make the 1st inclined plane the 52 and the 2nd inclined plane 64 reliably abut against.

Finally, pipe joint 10 is described and as the order of connection between the pitch tube P of the connecting object of opposite side.

It is inserted into pitch tube P, by the end abutment of pitch tube P in the end of large-diameter portion 30 to the insertion section 34 of adapter body 12. By being inserted in insertion section 34 by pitch tube P, thus the claw 24A of locking ring 24 expands under the effect of pitch tube P, the top ends card of claw 24A is hung on the outer peripheral face of pitch tube P, prevents coming off of pitch tube P, and pitch tube P is reliably connected at pipe joint 10. It addition, when pitch tube P is connected to adapter body 12, the O-ring seals 22 of core 14 is close to the inner peripheral surface of pitch tube P, it is ensured that the sealing between pitch tube P and core 14.

[the 2nd embodiment]

Then, the pipe joint 10 of the 2nd embodiment of the present invention is described according to Fig. 4. It addition, the accompanying drawing labelling that the structure mark identical with the 1st embodiment is identical, and the description thereof will be omitted.

In the 1st embodiment, 1st inclined plane 52 has the concave circular arc shape that radius is r1 of the center of curvature in the radial outside at large-diameter portion 30, but the present invention is not limited to this, it is also possible to be as shown in Figure 4, the inclined plane of linearity that tilts with constant angle relative to outer peripheral face and the 1st side wall surface 51 of large-diameter portion 30. In this case, the 2nd inclined plane 64 of acorn nut 54 is set to the shape that can abut against with the 1st inclined plane 52.

[the 3rd embodiment]

Then, the pipe joint 10 of the 3rd embodiment of the present invention is described according to Fig. 5. It addition, the accompanying drawing labelling that the structure mark identical with the 1st embodiment is identical, and the description thereof will be omitted.

As it is shown in figure 5, the 1st inclined plane 52 can also be configured to the inclined plane 52B including arc surface 52A and the linearity with constant angle inclination. In this case, the 2nd inclined plane 64 of acorn nut 54 is also set to the shape that can abut against with the 1st inclined plane 52 including arc surface 52A and inclined plane 52B.

Additionally, although not shown, but the 1st inclined plane 52 both can be the curve shape that multiple concave circular arc shape that radius of curvature is different are connected, it is also possible to be the face that is connected of the inclined plane (respectively constant angle) of the different multiple linearities in angle of inclination.

(other embodiments)

Above, enumerate embodiment and describe embodiments of the present invention, but these embodiments are examples, various change can be carried out without departing from the spirit and scope of the invention and implement. It addition, protection scope of the present invention is not limited to these embodiments certainly.

In the above-described embodiment, the 1st side wall surface the 51 and the 1st inclined plane 52 it is formed with in the inward flange side of the outward flange 50 of core 14, but the present invention is not limited to this, can also be, not having the 1st side wall surface 51 orthogonal to the axial direction in the inward flange side of outward flange 50, inward flange side all becomes the 1st inclined plane 52. In this case, outward flange side is all set to the 2nd inclined plane 64 by the inward flange 60 of acorn nut 54.

In the above-described embodiment, make the radius r2 of radius r1 and the 2 inclined plane 64 of the 1st inclined plane 52 consistent, as long as but the 1st inclined plane 52 contacts with the 2nd inclined plane 64 when fastening acorn nut 54, due to the error etc. on manufacturing, radius r1 and radius r2 can also be not quite identical.

Description of reference numerals

10 pipe joints; 12 adapter body; 14 cores; 16 sleeves (connecting portion); 18 adapter rings (connecting portion); 22O shape sealing ring (connecting portion); 24 locking rings (connecting portion); 26 cores (connecting portion); 50 outward flanges; 51 the 1st side wall surfaces (bearing surface); 52 the 1st inclined planes (bearing surface); 54 acorn nuts; 56 the 1st holes; 58 the 2nd holes; 60 inward flanges; 61 the 2nd side wall surfaces (by bearing surface); 62 female threads; 64 the 2nd inclined planes (by bearing surface).

Claims

1. a pipe joint, wherein, this pipe joint includes:

Core, it is for synthetic resin system and is formed as cylindric, and longitudinally one end is connected to body;

Outward flange, it is ring-type and the other end being formed at described core, and is radially oriented outside extension;

Bearing surface, it is formed at described outward flange, and includes the 1st inclined plane, and the 1st inclined plane tilts relative to the outer peripheral face of described core when being located at the corner between described core and described outward flange and observe under cross section axially; And

Acorn nut, comprising: cylinder portion, it is formed with internal thread part; Inward flange, it is radially oriented inner side and highlights and have the hole run through for described core from the end of cartridge; And by bearing surface, itself and described bearing surface abut against, and this is included the corner being formed at described inward flange the 2nd inclined plane abutted against with described 1st inclined plane by bearing surface.

2. pipe joint according to claim 1, wherein,

The radial dimension h of described 1st inclined plane is set to more than 40% relative to from the outer peripheral face of the described core radial dimension H along described outward flange radially to the outer peripheral face of described outward flange.

3. pipe joint according to claim 1 and 2, wherein,

Described 1st inclined plane is radius of curvature is the concaved circular cambered surface of r1, and described 2nd inclined plane is radius of curvature is the convex arc surface of r2, and is set as r1=r2.

4. the pipe joint according to any one of claims 1 to 3, wherein,

Described bearing surface has 1st side wall surface orthogonal with the outer peripheral face of described core,

Described had the 2nd side wall surface abutted against with described 1st side wall surface by bearing surface.