CN210770780U - Cutting ferrule formula pipe fitting connects - Google Patents

Abstract

The utility model discloses a ferrule type pipe fitting joint, which comprises a joint body; the pipe sleeve is used for locking and positioning and is fixedly connected with the joint body; and the clamping sleeve is used for auxiliary sealing, and an extrusion locking structure is arranged between the clamping sleeve and the pipe sleeve. A double sealing structure and an anti-pulling structure are arranged between the pipe sleeve and the joint body; resistance to plucking structure is including setting up the reverse blade on connecting the body outer wall and setting up the anti-skidding barb on the cutting ferrule inside wall. The utility model discloses a set up double seal structure, resistance to plucking structure and extrusion locking structure and make the pipe fitting joint have good sealed effect, resistance to plucking performance and anti-seismic performance.

Description

Cutting ferrule formula pipe fitting connects

Technical Field

The utility model belongs to the technical field of the tube coupling and specifically relates to a cutting ferrule formula pipe fitting connects.

Background

At present, the structural forms of the ferrule type joint pipe fittings are various, main components comprise screw caps, ferrules, sealing rings and joint bodies, the application ranges and media of different ferrule type joint pipe fittings are different, the sealing effects of the ferrule type joint pipe fittings are different, and the anti-pulling performance and the anti-seismic performance of the ferrule type joint pipe fittings are different. Most of ferrule type joint pipe fittings have the same or different sealing mechanisms, and a sealing ring is arranged on the inner wall or the outer wall of a pipe generally in a common sealing structure, so that the pipe can be effectively sealed, but the long-term risk resistance and the reliability of the pipe are not high enough. And the cutting ferrule outer wall side on the cutting ferrule formula joint pipe fitting commonly used can set up generally to be conical so that cutting ferrule and nut or joint body cooperation, extrude the cutting ferrule, and general cutting ferrule inner wall can set up even smooth or evenly set up cyclic annular rib, so that the pipe locks in extrusion process, but the cutting ferrule inner wall is smooth or cyclic annular rib not sharp-pointed enough can lead to locking the effect not good enough, thereby influence the tensile property and the anti-seismic performance of pipe fitting, its reliability also remains to promote in the long term.

For example, a "plastics pipeline terminal connector that recycles" that discloses on chinese patent literature, its publication number CN 208687221U, one end of its core structure is closed, the other end opening, the inner chamber of core structure is provided with spacing platform, the open end of core structure has the mounting hole that is used for installing the screw thread tightening piece, be provided with the internal thread on the inner wall of mounting hole, be provided with the external screw thread on the outer wall of screw thread tightening piece, screw thread tightening piece and core structure threaded connection, the middle part of core structure is provided with the sealing washer groove, the sealing washer inslot embedding has the sealing washer, the inboard of screw thread tightening piece is provided with the stopping clamp ring, the left and right terminal surface of stopping clamp ring, be provided with C type elastic sealing ring between the left side terminal surface of stopping clamp ring and the spacing platform. The utility model discloses a beneficial effect lie in: the tool can be repeatedly disassembled and recycled, is convenient to install, and does not need external tool fixtures and the skill requirement of operators. However, the utility model has some defects, and the utility model only arranges the sealing element on the outer wall of the plastic pipeline, which affects the sealing effect; secondly, there is no anti-slip structure on the pipe termination joint, which affects anti-slip and anti-seismic performance.

SUMMERY OF THE UTILITY MODEL

The utility model relates to an overcome the sealed effect that prior art's cutting ferrule formula connects uneven, resistance to plucking performance and the not good problem of anti-seismic performance, provide a cutting ferrule formula pipe fitting and connect, have good sealed effect, and the resistance to plucking performance of structure, anti-seismic performance are good.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a ferrule type pipe fitting joint comprises a joint body; the pipe sleeve is used for locking and positioning and is fixedly connected with the joint body; the clamping sleeve is used for auxiliary sealing, and an extrusion locking structure is arranged between the clamping sleeve and the pipe sleeve; a double sealing structure and an anti-pulling structure are arranged between the pipe sleeve and the joint body; resistance to plucking structure is including setting up the reverse blade on connecting the body outer wall and setting up the anti-skidding barb on the cutting ferrule inside wall.

When the pipe sleeve is installed, the joint body is firstly inserted into a pipe, then the double-sealing structure is arranged, the sleeve is sleeved on the pipe, and finally the fixed connection between the pipe sleeve and the joint body is completed. An extrusion locking structure is arranged between the clamping sleeve and the pipe sleeve, when the pipeline is fixedly connected with the joint body, the clamping sleeve can gradually lock the pipe along with the push of the pipe to tightly grasp the pipe, and the sealing property of the pipe is enhanced while the pulling resistance of the pipe is enhanced; when the pipe is installed, the friction force between the pipe and the pipe joint is enhanced by the anti-pulling structure on the joint main body, the friction force between the pipe joint and the inner wall of the pipe is enhanced by the reverse cutting edge on the joint main body, the direction of the reverse cutting edge is consistent with the insertion direction of the pipe, so that the friction force is small when the pipe is inserted, and the large friction force is generated between the joint main body and the inner wall of the pipe when the pipe is pulled out, so that the pipe is not easy to fall off; and the anti-skidding barb on the cutting ferrule inside wall has strengthened the frictional force between tubular product outer wall and the cutting ferrule, just can grasp tubular product after the cutting ferrule locks, and this all has frictional force between just making pipe fitting inside and outside wall and pipe fitting joint, has strengthened the resistance to plucking ability that the pipe fitting connects, still strengthens the security that the pipe fitting connects the use simultaneously.

Preferably, the double sealing structure comprises a first double sealing structure and a second double sealing structure; the first heavy seal structure comprises a radial seal groove arranged on the joint body and a pipe inner wall seal element fixed on the radial seal groove; the second reseal structure comprises an axial seal groove arranged on the joint body and a pipe outer wall seal element arranged on the axial seal groove.

The first heavy seal structure seals the inner wall of the pipe, the radial seal groove is formed in the reverse cutting edge, the pipe inner wall seal is fixed in the radial seal groove, the pipe inner wall seal is a convex seal ring, the lower portion of the convex seal ring is matched with the radial seal groove in the joint body, the upper portion of the convex seal ring is of a hemispherical ring structure, and the pipe is extruded when inserted, so that a seal effect is generated; the second double-sealing structure seals the outer wall of the pipe, the pipe outer wall sealing element is arranged on the axial sealing groove of the joint body, the pipe outer wall sealing element is fixed on the axial sealing groove of the joint body after the pipe is inserted, and the pipe outer wall sealing element is extruded by the clamping sleeve, so that the outer wall of the pipe is sealed; the double-sealing structure seals the inner wall and the outer wall of the pipe, so that the sealing performance of the pipe fitting is improved.

Preferably, the pipe outer wall sealing element is a V-shaped sealing ring, and the height of the V-shaped sealing ring is larger than the axial groove depth of the axial sealing groove in the joint body.

The structure of the V-shaped sealing ring is matched with the axial sealing groove on the joint body, so that sealing with a longer length and a larger area is formed, the sealing performance of the pipe is enhanced and the anti-seismic performance of the pipe is improved due to a larger contact area; in addition, the depth of the V-shaped sealing ring is larger than the depth of an axial groove of an axial sealing groove in the joint body, so that the V-shaped sealing ring deforms after being extruded by the clamping sleeve, the abnormal sound notch of the joint body can be tightly blocked, and a better sealing effect is achieved.

Preferably, the extrusion locking structure comprises a first extrusion conical surface arranged on the inner side wall of the pipe sleeve, a second extrusion conical surface arranged on the cutting ferrule and a notch structure arranged on the cutting ferrule, and the second extrusion conical surface is matched with the first extrusion conical surface of the pipe sleeve.

In the process of fixing the pipe sleeve, an extrusion surface is formed between the pipe sleeve and the clamping sleeve, the clamping sleeve moves along with the pipe sleeve, in the process of moving, due to the fact that the clamping sleeve is provided with the notch structure, the clamping sleeve can contract along the radial direction and is gradually locked, the pipe can be locked by the barbs arranged on the inner wall of the clamping sleeve, the pipe is effectively prevented from being loosened, the pulling resistance and the shock resistance of the pipe are enhanced, and the safety of the pipe in use is improved. In addition, the movement of the cutting sleeve pushes the V-shaped sealing ring, so that the V-shaped sealing ring is deformed under pressure, and the sealing effect of the pipe fitting is enhanced.

Preferably, the ferrule type pipe fitting joint further comprises a retaining ring used for limiting a sealing element on the outer wall of the pipe, and the retaining ring is sleeved on the pipe.

The retainer ring is used for limiting a sealing element on the outer wall of the pipe, the radial height of the retainer ring exceeds the boundary of the axial sealing groove in the joint body, the possibility that the radial height of the retainer ring exceeds the range of the axial sealing groove of the joint body in the pushing deformation process of the V-shaped sealing ring is effectively avoided, and the sealing effect of the pipe is enhanced.

Preferably, the pipe sleeve is provided with an internal thread, and the joint body is provided with an external thread.

The fixed connection between the pipe sleeve and the joint body is set to be threaded connection, the pipe sleeve and the joint body are connected together through the internal thread on the pipe sleeve and the external thread on the joint body, the threaded connection enables the pipe sleeve and the joint body to be connected stably and not to be loosened easily, and the safety of the pipe fitting during use is improved.

Preferably, the outer diameter of the port of the joint body is 0.2mm to 0.5mm larger than the inner diameter of the pipe.

After the pipe is inserted, interference fit is formed between the pipe and the joint body, so that the pipe is not easy to fall off, and a better sealing effect can be achieved.

Preferably, the joint body is provided with a wrench fixing protrusion convenient to mount.

When fixing joint body and pipe box, place the spanner in the fixed bellied position of spanner, be convenient for install between installation joint body and the pipe box.

Preferably, the port structure of the joint body is provided in a bell mouth shape.

The end part of the joint body is arranged to be in a horn mouth shape, and when the pipe is installed and used, the resistance between fluid and the joint body can be reduced.

Therefore, the utility model discloses following beneficial effect has:

(1) the double-sealing structure is arranged on the pipe fitting, so that the pipe fitting joint has a good sealing effect;

(2) the pipe fitting joint has good anti-pulling performance by arranging the anti-skidding barbs on the clamping sleeve and arranging the reverse cutting edges on the joint body;

(3) by arranging the extrusion locking structure, the anti-pulling capacity of the pipe fitting joint is enhanced, and meanwhile, the sealing effect of the pipe fitting joint is enhanced;

(4) the contact area between the V-shaped sealing ring and the pipe is increased by arranging the V-shaped sealing ring, so that the sealing property and the anti-seismic property of the pipe joint are enhanced;

(5) by providing the port structure of the connector body in a flared shape, the resistance between the fluid and the pipe connector is reduced.

Drawings

Fig. 1 is a schematic structural view of a ferrule type pipe fitting joint according to the present invention;

FIG. 2 is a schematic view of one configuration of the fitting body;

FIG. 3 is another structural schematic view of the fitting body;

FIG. 4 is a schematic view of one construction of a pipe sleeve;

fig. 5 is a schematic view of one construction of the ferrule;

FIG. 6 is a schematic view of the construction of the tube outer wall seal;

FIG. 7 is a cross-sectional view of a tubing outer wall seal;

in the figure: 1. the pipe fitting comprises a pipe 2, a pipe sleeve 201, a first extrusion conical surface 202, an internal thread 3, a fitting body 301, a radial sealing groove 302, a reverse cutting edge 303, an axial sealing groove 304, an external thread 305, a wrench fixing protrusion 4, a pipe inner wall sealing element 5, a clamping sleeve 501, an anti-skidding barb 502, a notch structure 503, a second extrusion conical surface 6, a retainer ring 7 and a pipe outer wall sealing element.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

Example 1:

in embodiment 1 shown in fig. 1, 2 and 7, a ferrule type pipe fitting joint includes a joint body 3; the pipe sleeve 2 is used for locking and positioning, and the pipe sleeve 2 is fixedly connected with the joint body 3; and the clamping sleeve 5 is used for assisting in sealing, and an extrusion locking structure is arranged between the clamping sleeve 5 and the pipe sleeve 2. A double sealing structure and an anti-pulling structure are arranged between the pipe sleeve 2 and the joint body 3; the anti-pulling structure comprises a reverse cutting edge 302 arranged on the outer wall of the connector body 3 and an anti-slip 501 thorn arranged on the inner side wall of the cutting sleeve 5. The double seal structure comprises a first double seal structure and a second double seal structure; the first resealing structure comprises a radial sealing groove 301 arranged on the joint body 3 and a pipe inner wall sealing element 4 fixed on the radial sealing groove 301; the second reseal structure includes an axial seal groove 303 provided on the joint body 3 and a pipe outer wall seal 7 provided on the axial seal groove 303.

The pipe fitting is provided with an anti-pulling structure and a double-sealing structure, the anti-pulling structure is provided with a reverse cutting edge 302 on the joint body 3, the direction of the reverse cutting edge 302 is consistent with the insertion direction of the pipe 1, so that the pipe 1 can be conveniently inserted, but when the pipe 1 is pulled out, the pipe 1 and the reverse cutting edge 302 have larger friction force, so that the pipe 1 is not easy to pull out; also set up anti-skidding barb 501 on 5 inside walls of cutting ferrule, anti-skidding barb 501 has strengthened the frictional force between 5 inside walls of cutting ferrule and the 1 outer wall of tubular product, also can make tubular product 1 difficult quilt after fixed extract, strengthens the resistance to plucking ability of pipe fitting, has improved the security when pipe fitting joint 1 uses. The double sealing structure is set as a first double sealing structure and a second double sealing structure, the first double sealing structure seals the inner wall of the pipe 1, the radial sealing groove 3 is arranged on the reverse cutting edge 302, the pipe inner wall sealing element 4 is fixed in the radial sealing groove 3, the pipe inner wall sealing element 4 is set as a convex sealing ring, the lower part of the convex sealing ring is matched with the radial sealing groove 3 on the joint body 3, the upper part of the convex sealing ring is a hemispherical ring structure, and the pipe 1 is extruded when inserted, so that the sealing effect is generated; the outer wall of the pipe 1 is sealed by the second resealing structure, the pipe outer wall sealing element 7 is arranged on the axial sealing groove 303 of the joint body 3, the pipe outer wall sealing element 7 is arranged to be a V-shaped sealing ring, the axial sealing groove 303 is matched with the V-shaped sealing ring, after the pipe 1 is inserted, the pipe outer wall sealing element 7 is fixed on the axial sealing groove 303 of the joint body 3, when the cutting sleeve 5 and the pipe sleeve 2 are installed, the pipe sleeve 2 is pushed inwards to push the cutting sleeve 5, the cutting sleeve 5 pushes the V-shaped sealing ring, the height of the V-shaped sealing ring is larger than the axial depth of the axial sealing groove on the joint body 3, and therefore the V-shaped sealing ring is deformed after being extruded by the cutting sleeve 5, so that the abnormal sound notches of the joint body 3; the double-sealing structure seals the inner wall and the outer wall of the pipe 1, so that the sealing performance of the pipe is improved. In addition, the use of the V-shaped sealing ring increases the contact area between the sealing ring and the pipe 1, thereby improving the sealing effect and simultaneously enhancing the shock resistance.

The pipe sleeve 2 is provided with the internal thread 202, the joint body 3 is provided with the external thread 304, the pipe sleeve 2 and the joint body 3 are fixedly connected together through the internal thread 202 and the external thread 304, the pipe sleeve 2 and the joint body 3 can be stably connected together, the use safety of a pipe fitting is improved, when the pipe 1 needs to be detached from the pipe fitting, the threaded connection between the pipe sleeve 2 and the joint body 3 is firstly detached, then the clamping sleeve 5 is detached, and then the pipe 1 is pulled out.

Example 2:

as shown in fig. 4, 5, and 6, the embodiment 2 is basically the same as the embodiment 1, except that: be provided with first extrusion conical surface 201 at pipe box 2 one end, be provided with second extrusion conical surface 503 on one end of cutting ferrule 5, be provided with opening structure 501 on cutting ferrule 5, here opening structure 501 sets up to C type opening, when rotating fixed connection between pipe box 2 and joint body 3, pipe box 2 can inwards extrude cutting ferrule 5, makes cutting ferrule 5 inwards shrink, and the internal diameter of cutting ferrule 5 diminishes to make cutting ferrule 5 can hug closely tubular product, strengthen tubular product 1's resistance to plucking performance. In addition, when dismantling tubular product 1, owing to be provided with the V-arrangement opening on the cutting ferrule, this just makes after dismantling pipe box 2, the cutting ferrule can radially expand to can dismantle cutting ferrule 5 easily, the barb structure on the cutting ferrule inside wall can not scrape colored tubular product 1 outer wall when dismantling yet, causes the damage to tubular product 1.

Example 3:

the embodiment 3 is basically the same as the embodiment 1, except that: the utility model provides a cutting ferrule formula pipe fitting connects, still includes retaining ring 6, 6 covers of retaining ring are established on tubular product 1, the retaining ring is used for spacing tubular product outer wall sealing member, retaining ring 6 sets up between V type sealing washer and cutting ferrule 5, retaining ring 6's radial height surpasss the boundary of axial seal groove 303 on the joint body 3, this has effectively avoided the possibility that surpasss the scope of axial seal groove 303 on the joint body 3 in the V type sealing washer receives to push away the deformation process, has strengthened the sealed effect of tubular product 1.

Example 4:

the embodiment 4 is basically the same as the embodiment 1, except that: the outer diameter of the port of the joint body 3 is set to be 0.2mm to 0.5mm larger than the inner diameter of the pipe 1, so that interference fit is formed between the joint body 3 and the port, and the pulling resistance and the seismic resistance of the pipe fitting are favorably enhanced.

Example 5:

the embodiment 5 is basically the same as the embodiment 1, except that: set up fixed protruding 305 of spanner on connecting body 3, fixed protruding 305 of spanner is used for placing the spanner on connecting the body, and when the installation, the personnel of the personnel directly grab and connect body 3 and install and have a great deal of inconvenience, and have the insecure problem of installation between connecting body 3 and pipe box 2 in the installation, utilize the spanner not only can be laborsaving, can also firmly install connecting body 3 and pipe box 2 together.

Example 6:

as shown in fig. 3, the embodiment 6 is basically the same as the embodiment 1, except that: the port of the joint body 3 is arranged in a horn mouth shape, so that the resistance between the joint body 3 and fluid is reduced when the pipe 1 and the pipe fitting are installed and used.

In addition, the V-shaped sealing ring and the convex sealing ring in the utility model are made of materials meeting the relevant national sanitary standards, acrylonitrile butadiene rubber is strictly forbidden, and materials advocated by the nation such as ethylene propylene diene monomer are suitable; the material of other parts except the sealing ring is made of various metal materials such as copper and steel with various load strength and safety requirements.

In summary, the steps of mounting the pipe 1 on the ferrule type joint pipe are as follows: firstly, mounting a pipe inner wall sealing element on a sealing groove of a joint body 3, and fixing the pipe inner wall sealing element; then install tubular product 1 on connecting body 3, then overlap tubular product outer wall sealing member 7, retaining ring and cutting ferrule on tubular product 1 in proper order, install pipe box 2 at last, fix pipe box 2 rotation on connecting body 3 to accomplish the installation of tubular product 1. When tubular product 1 dismantles, rotatory pipe box 2 demolishs threaded connection between tubular product 1 and the pipe box 2, and at this moment, the opening structure 501 on the cutting ferrule can make the cutting ferrule radially enlarge, is convenient for demolish the cutting ferrule, then demolish the retaining ring again, extract tubular product 1 from connecting body 3 at last, accomplish the dismantlement.

The above examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes are intended to fall within the scope of the claims.

Claims (9)

1. A ferrule type pipe fitting joint is characterized by comprising,

a joint body (3);

the pipe sleeve (2) is used for locking and positioning and is fixedly connected with the joint body (3);

the clamping sleeve is used for auxiliary sealing, and an extrusion locking structure is arranged between the clamping sleeve (5) and the pipe sleeve (2);

a double sealing structure and an anti-pulling structure are arranged between the pipe sleeve (2) and the joint body (3);

the anti-pulling structure comprises a reverse cutting edge (302) arranged on the outer wall of the joint body (3) and anti-skidding barbs (501) arranged on the inner side wall of the clamping sleeve (5).

2. The ferrule-type tube fitting joint according to claim 1, wherein the double seal structure comprises a first double seal structure and a second double seal structure;

the first resealing structure comprises a radial sealing groove (301) arranged on the joint body (3) and a pipe inner wall sealing element (4) fixed on the radial sealing groove (301);

the second reseal structure comprises an axial seal groove (303) arranged on the joint body (3) and a pipe outer wall sealing element (7) arranged on the axial seal groove (303).

3. A ferrule type pipe fitting joint according to claim 2, wherein the pipe outer wall sealing member (7) is configured as a V-shaped sealing ring, and the height of the V-shaped sealing ring is greater than the axial groove depth of the axial sealing groove on the joint body (3).

4. A ferrule type pipe fitting joint according to claim 1, wherein the compression locking structure comprises a first compression taper surface (201) provided on an inner sidewall of the pipe sleeve (2), a second compression taper surface (503) provided on the ferrule (5), and a notch structure (502) provided on the ferrule (5), the second compression taper surface (503) cooperating with the first compression taper surface (201) of the pipe sleeve.

5. A ferrule type pipe fitting joint according to any one of claims 1 to 4, further comprising a retaining ring (6) for limiting a sealing element on the outer wall of the pipe, wherein the retaining ring (6) is sleeved on the pipe (1).

6. A ferrule type pipe fitting joint according to any one of claims 1 to 4, wherein the pipe sleeve (2) is provided with an internal thread (202), and the joint body (3) is provided with an external thread (304).

7. A ferrule type pipe fitting joint according to any one of claims 1 to 4, wherein the outer diameter of the end port of the joint body (3) is 0.2mm to 0.5mm larger than the inner diameter of the pipe (1).

8. A ferrule type pipe fitting joint according to any one of claims 1 to 4, wherein a wrench fixing protrusion (305) is provided on the joint body (3).

9. A ferrule type pipe fitting joint according to any one of claims 1 to 4, wherein the port structure of the joint body (3) is configured in a flared shape.

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