CN212407857U - Soft sealing mechanism of cutting ferrule formula joint - Google Patents
Soft sealing mechanism of cutting ferrule formula joint Download PDFInfo
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- CN212407857U CN212407857U CN202020828863.9U CN202020828863U CN212407857U CN 212407857 U CN212407857 U CN 212407857U CN 202020828863 U CN202020828863 U CN 202020828863U CN 212407857 U CN212407857 U CN 212407857U
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- conical surface
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- clamping sleeve
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Abstract
The utility model discloses a soft sealing mechanism that cutting ferrule formula connects, including connecting body, cutting ferrule, nut, draw-in sleeve pipe, elasticity plate washer and sealing washer. The joint body and the nut are provided with mutually matched threads, and the inner cavity is provided with a cylindrical hole matched with the clamping sleeve and a conical opening for accommodating the sealing ring and the elastic retaining ring; the front end of the cutting sleeve provides support for the elastic retainer ring and is contacted with the end face of the joint body through a stop step, the rear end is provided with a conical surface for driving the nut and a plurality of axial grooves, the starting part of an inner hole at the rear end is provided with a limiting step hole, and one or more convex cutting edges are arranged next to the step hole; the nut pushes the front end of the clamping sleeve to support the elastic stop ring and the sealing ring to perform soft sealing, and the clamping sleeve is extruded by screwing the nut, so that the inner cutting edge of the clamping sleeve hole is cut into the clamping sleeve until the clamping sleeve is tightly embraced by the limiting step hole in the clamping sleeve installation. The nut aperture is greater than the cutting ferrule external diameter, makes things convenient for the visual inspection installation condition in place. The utility model provides a plurality of not enough of prior art existence.
Description
Technical Field
The utility model relates to a cutting ferrule formula connects technical field, specifically is a soft sealing mechanism that cutting ferrule formula connects.
Background
The cutting ferrule type joint in the standards of ISO8434, SAE J514 and the like is widely applied to various hydraulic and pneumatic pipeline systems and is commonly used in the industries of airplanes, trains, shipping, engineering machinery, electric power, gas and the like.
Ferrule type pipe joints involved in the above standards are all in a hard seal form, and include a joint body, a nut, and a ferrule. The clamping sleeve is matched with the joint body through the conical surface, the nut is continuously screwed with the upper threads of the joint body, the nut pushes the clamping sleeve, and the front end of the clamping sleeve is downwards cut into the outer wall of the clamping sleeve pipe along the inner conical surface of the joint body so as to form sealing between the clamping sleeve and the clamping sleeve pipe and between the clamping sleeve and the inner conical surface of the joint body. This hard sealing technique has mainly 4 disadvantages: firstly, in the installation process, the diameter shrinkage of the front end of the ferrule tube causes the plastic deformation resistance of the front end of the ferrule and the deformation resistance of the ferrule cutting into the ferrule tube to occur simultaneously, so that the installation of the ferrule requires a large torque. Secondly, the cutting-in function of the cutting ferrule is required, so that the cutting ferrule has high surface hardness, the front end of the cutting ferrule has to be capable of radially and plastically deforming to generate necking, and the surface hardening layer is required to be thin to keep the flexibility of the inner part, so that the technical performance requirement of the cutting ferrule is very strict, and the cutting ferrule still depends on an inlet in a large number of important occasions. The third point installation needs to depend on the experience of installation personnel, is difficult to detect, is usually not over-screwed or under-screwed, and has potential safety hazards. And compared with soft sealing, the fourth point of hard sealing reduces the sealing reliability.
Disclosure of Invention
Technical problem to be solved
The utility model provides a not enough to prior art, the utility model provides a soft sealing mechanism that cutting ferrule formula connects adopts soft sealing to replace hard sealing. The plastic deformation requirement on the cutting sleeve is eliminated, the technical performance requirement of the cutting sleeve is reduced, the cutting sleeve is convenient to process and produce, and meanwhile, the problem of overlarge installation torque is solved. The utility model discloses the visual inspection problem whether the installation targets in place has also been solved simultaneously.
The technical scheme is as follows:
in order to solve the above problem, the utility model provides a following technical scheme: a soft sealing mechanism of a cutting ferrule type joint is shown in figure 1 and comprises a cutting ferrule 1, a nut 2, a joint body 3, a cutting ferrule pipe 4, an elastic retainer ring 5 and a sealing ring 5; the joint body and the nut are provided with threads matched with each other.
The connector body 3 is provided with a cylindrical hole matched with the outer diameter of the clamping sleeve pipe 4, an inner conical surface is arranged between the end surface of the connector body 3 and the cylindrical hole, the inner conical surface and the outer wall of the clamping sleeve pipe 4 form a conical opening, and a cavity for accommodating the sealing ring and the elastic retaining ring is arranged in the conical opening.
As shown in figures 3 and 4, the cutting sleeve 1 is characterized in that an elastic sealing ring 5 is supported by a front end face 11, an outer conical surface 12 with a small front part and a large back part is arranged behind the front end face 11, a stop step is arranged behind the outer conical surface, a first section of cylindrical surface 13 is arranged behind the stop step, a cylindrical groove 14 with an outer diameter smaller than that of the first cylindrical surface is arranged behind the first section of cylindrical surface 13, a third cylindrical surface 15 with a diameter larger than that of the cylindrical groove is arranged behind the cylindrical groove 14, a driving outer conical surface 16 with a large front part and a small back part is arranged between the third cylindrical surface 15 and a back end face 17, a plurality of axial grooves 113 which are radially penetrated and axially and are not penetrated are arranged from the back end face 17 to the front end face, a first section of cylindrical inner hole 18 starting from the back end face is an installation limiting step hole, a first section of cylindrical inner groove 19 with a larger diameter is arranged from the front part of, in analogy, one or more annular cutting edges 110 can be arranged in the length range of the axial groove, and a cylindrical inner hole 112 matched with the outer diameter of the ferrule tube is arranged between the last section of the cylindrical inner groove 111 with the diameter larger than that of the mounting limiting step hole and the front end surface 11; the outer conical surface 12 at the front end of the cutting sleeve has the function of entering a conical opening of the connector body to support the elastic retainer ring 5, and a stop step behind the outer conical surface 12 is contacted with the end surface of the connector body 3 to ensure the fixation of the front end position. The design of axial groove 113 lies in avoiding cutting ferrule inner bore edge 110 to produce plastic deformation when cutting into the ferrule, and cylindrical groove 14 on the ferrule periphery makes ferrule elastic deformation easier, therefore has reduced the installation moment of torsion on the whole, has also reduced prior art to the technical performance requirement of ferrule 1, and easier production and processing. The design of the installation limit step hole 18 is used to avoid over-torquing or under-torquing when the nut is tightened.
The inner diameter of the through hole of the nut 2 has a larger clearance with the outer diameter of the cutting sleeve pipe 4, and the rear part of the internal thread of the nut 2 is provided with a driving inner conical surface matched with the driving outer conical surface 16 of the cutting sleeve 1; the tight holding condition of the clamping sleeve rear end installation limiting step hole 18 and the outer wall of the clamping sleeve pipe 4 can be observed through the gap.
The nut 2 compresses the clamping sleeve by driving the inner conical surface.
As a modification, as shown in fig. 5, the outer ring 51 of the elastic retainer is a conical surface with an angle consistent with that of the conical opening of the connector body 3, the diameter of the large end of the conical surface is smaller than that of the large end of the conical opening of the connector body 3, the inner hole is smaller than or equal to the outer diameter of the clamping sleeve 4, and the cross section of the retainer is a right trapezoid. The elastic retaining ring is provided with a through notch with an included angle of less than or equal to 30 degrees with the upper surface and the lower surface. The elastic retainer ring 5 designed in this way can automatically adjust the size of an inner hole according to the difference of the outer diameter of the clamping sleeve pipe 4, and is tightly attached to the outer wall of the clamping sleeve pipe 4, meanwhile, the outer conical surface 51 can be effectively attached to the inner conical surface of the connector body 3, and the large end is also more easily attached to the front end face 11 of the clamping sleeve under pressure, so that the sealing is more reliable.
Preferably, the angle of the external conical surface 12 with a small front end and a large back end at the front end of the cutting sleeve 1 is consistent with the angle of the internal conical surface of the connector body 3, the external diameter of the small end of the conical surface 12 is equal to the external diameter of the large end of the elastic retainer ring 5, and the external diameter of the large end of the conical surface is equal to the external diameter of the large end of the internal conical surface of the connector body 3. The outer diameter of the rear stop step of the outer conical surface is larger than the outer diameter of the large end of the inner conical surface of the joint body 3. The design provides the largest supporting area for the elastic retainer ring 5, the design of the front-end outer conical surface 13 is convenient for the front end of the cutting sleeve 1 to enter the joint body 3, and the stop step at the rear end prevents the front end of the cutting sleeve 1 from entering the joint body 3 too deeply, so that the elastic retainer ring 5 and the sealing ring 6 are damaged.
Preferably, the axial grooves 113 at the rear end of the ferrule 1 are uniformly distributed, and when the nut 2 tightly presses the rear end of the ferrule 1, the uniformly distributed axial grooves 113 facilitate the cutting edges 110 in the hole of the ferrule 1 to uniformly cut into the outer wall of the ferrule tube 4.
As an optimization, the installation limiting step hole 18 at the rear end of the ferrule 1 holds the outer diameter of the ferrule tube 4 tightly after the installation is completed, and the degree of holding can be used as a standard for visual inspection to judge whether the ferrule tube is installed in place.
As an optimization, the section of the annular cutting edge 110 of the inner hole of the cutting sleeve 1 is an isosceles triangle or a right-angled triangle, the strength of the cutting edge of the isosceles triangle is high, and the cutting edge of the right-angled triangle is beneficial to improving the anti-stripping capability of the whole mechanism under pressure when the right-angled edge is the front side of the cutting sleeve.
As an improvement, the cutting sleeve 1 is hardened at least at the annular cutting edge 110 or is integrally hardened, so that the cutting edge can be cut into the outer wall of the cutting sleeve pipe more easily, and the requirement of installation torque is reduced.
As an optimization, the clearance between the through hole of the nut 2 and the outer diameter of the clamping sleeve pipe 4 is large enough to enable the user to see whether the limiting step hole 18 arranged at the rear end of the clamping sleeve 1 tightly embraces the clamping sleeve pipe 4 or not by naked eyes, and the problem of judging and detecting whether the clamping sleeve is arranged in place or not is solved.
Preferably, the inner diameter of the seal ring 6 is smaller than the outer diameter of the snap ring 4, and the wire diameter is larger than the average radial thickness of the elastic retainer 5, so that the seal ring 6 is stretched in the inner diameter and compressed in the outer diameter after being mounted, which contributes to the improvement of the reliability of the seal.
(III) advantageous effects
The utility model has the advantages that:
the first point is as follows: compared with the prior art, the sealing mechanism has the advantages that the sealing effect of the sealing mechanism is ensured by adopting a soft sealing mode comprising the sealing ring and the elastic retainer ring.
The second point, the utility model discloses a cutting ferrule 1 axial groove 110's design because eliminated throat plastic deformation requirement, this point greatly reduced the technical performance forest of cutting ferrule and made the degree of difficulty.
Third, as with the second advantageous effect described above, the required installation torque is also reduced compared to the prior art because of the elimination of the necking plastic deformation requirement.
And the fourth point, through a larger gap between the inner hole of the nut 2 and the clamping sleeve pipe 4, whether the clamping sleeve pipe 4 is tightly embraced by the limiting step hole 18 installed at the rear end of the clamping sleeve 1 or not can be observed, so that the installer and the inspector can judge whether the mechanism is installed in place or not.
Drawings
FIG. 1 is a schematic view of the mechanism of the present invention before installation;
FIG. 2 is a schematic view of the mechanism of the present invention after installation;
FIG. 3 is a schematic cross-sectional view of the ferrule taken along the axial slot;
fig. 4 a cross-sectional view of the ferrule, C-C of fig. 3
FIG. 5 is a cross-sectional view of an elastic retainer
The reference numerals are explained below:
1 cutting sleeve, 2 nuts, 3 joint bodies, 4 cutting sleeves, 5 elastic retainer rings and 6 sealing rings
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described with reference to the following embodiments.
Referring to fig. 1, the utility model discloses a joint body 3 for being connected with cutting ferrule pipe 4 for sealed sealing washer 6, elasticity plate washer 5, be used for supporting cutting ferrule 1 that elasticity plate washer 5 and chucking cutting ferrule pipe 4 prevented to dial out, be used for the drive and compress tightly nut 2 of cutting ferrule 1.
After the clamping sleeve 4 extends into the joint body 3, a conical opening is formed between the outer wall of the clamping sleeve 4 and the left end surface and the inner conical surface of the joint body 3, and a sealing ring 6 and an elastic retaining ring 5 can be accommodated in the conical opening. The nut 2 and the joint body 3 are provided with mutually matched threads. The nut 2 is pushed rightwards, and the cutting sleeve 1 pushes the elastic retainer ring 5 and the sealing ring 6 rightwards to enter the conical opening. The nut 2 starts to be screwed, the conical surface 12 at the right end of the cutting sleeve 1 starts to enter the conical opening, and the right end surface 11 continues to push the elastic retainer ring 5 and the sealing ring 6 to enter the deeper part of the conical opening until the stop step on the cutting sleeve 1 is contacted with the left end surface of the joint body 3. The elastic retainer ring 5 is provided with a slope notch, the inner diameter can tightly hold the outer diameter of the clamping sleeve 4, the outer conical surface 51 can be attached to the inner conical surface of the connector body 3, and meanwhile, the right end surface 11 of the clamping sleeve 1 provides support for the left end surface 52 of the elastic retainer ring 5, so that an effective soft sealing mechanism is formed in the conical surface. The nut 2 is further tightened, the left side of the cutting ferrule 2 begins to shrink towards the outer diameter direction of the cutting ferrule tube 4 under the interaction of the inner conical surface of the nut 2 and the outer conical surface 16 at the left end of the cutting ferrule 1, and the cutting edge 110 in the hole of the cutting ferrule 1 begins to cut into the cutting ferrule tube 4. Through the clearance between nut 2 and cutting ferrule pipe 4, can observe that the clearance begins to diminish between cutting ferrule 1 left side installation spacing step hole 18 and the cutting ferrule pipe 4, when cutting ferrule 1 installation spacing step hole 18 laminating cutting ferrule pipe 4, the installation is accomplished as shown in fig. 2.
The utility model discloses a soft seal has improved sealed reliability, and is sealed effectual, the stable performance. The utility model discloses a cutting ferrule technical requirement simple, easily production control quality. Simultaneously the utility model discloses the installation moment of torsion has also been reduced to whether easily detect and install in place.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiments should not be considered as limitations of the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention, and these modifications and variations should be considered as the protection scope of the invention.
Claims (8)
1. A soft sealing mechanism of a cutting ferrule type joint comprises a cutting ferrule, a nut, a joint body, a cutting ferrule, an elastic retainer ring and a sealing ring; be provided with the screw thread of mutually supporting on the body of connecting and the nut, its characterized in that:
the connector body is provided with a cylindrical hole matched with the outer diameter of the cutting sleeve pipe, an inner conical surface is arranged between the end surface of the connector body and the cylindrical hole, the inner conical surface and the outer wall of the cutting sleeve pipe form a conical opening, and a cavity for accommodating the sealing ring and the elastic retainer ring is arranged in the conical opening;
the front end face of the cutting sleeve supports the elastic sealing ring, the back of the front end face is a section of external conical surface with a small front part and a large back part, the back of the external conical surface is a stop step, the back of the stop step is a first section of cylindrical surface, the back of the first section of cylindrical surface is a cylindrical groove with an outer diameter smaller than that of the first cylindrical surface, the back of the cylindrical groove is a third cylindrical surface with a diameter larger than that of the cylindrical groove, a driving external conical surface with a large front part and a small back part is arranged between the third cylindrical surface and the back end face, a plurality of axial grooves which are radially penetrated and axially not penetrated are arranged from the back end face to the front end face, a first section of cylindrical inner hole starting from the back end face is a mounting limit step hole, a second section of cylindrical inner groove with a larger diameter is arranged from the front of the step hole, an annular cutting edge is arranged behind the second section of cylindrical, a section of cylindrical inner hole matched with the outer diameter of the clamping sleeve is arranged between the last section of cylindrical inner slotted hole with the diameter larger than that of the mounting limiting step hole and the front end face;
the inner diameter of the through hole of the nut has a larger clearance with the outer diameter of the cutting sleeve pipe, and the rear part of the internal thread of the nut is provided with a driving inner conical surface matched with the driving outer conical surface of the cutting sleeve;
the nut compresses the clamping sleeve by driving the inner conical surface.
2. The soft sealing mechanism of a ferrule-type fitting of claim 1, wherein: the outer ring of the elastic retainer ring is a conical surface with the same angle as the conical opening of the connector body, the diameter of the large end of the conical surface is smaller than that of the large end of the conical opening of the connector body, the diameter of an inner hole is smaller than or equal to the outer diameter of the clamping sleeve, the cross section of the retainer ring is in a right trapezoid shape, and a through notch with an included angle of less than or equal to 30 degrees with the upper surface and the lower surface is formed in the.
3. The soft sealing mechanism of a ferrule-type fitting of claim 2, wherein: the front small-back large outer conical surface angle of the front end of the clamping sleeve is consistent with the inner conical surface angle of the connector body, the outer diameter of the small end of the outer conical surface is equal to the outer diameter of the large end of the elastic retainer ring, the outer diameter of the large end of the outer conical surface is equal to the outer diameter of the large end of the inner conical surface of the connector body, and the outer diameter of the rear stop step of the outer conical surface is larger than the outer diameter of the large end.
4. The soft sealing mechanism of a ferrule-type fitting of claim 1, wherein: the axial grooves at the rear end of the clamping sleeve are uniformly distributed.
5. The soft sealing mechanism of a ferrule-type fitting of claim 1, wherein: the installation of cutting ferrule rear end is spacing step hole, and after the installation, this step hole hugs closely cutting ferrule external diameter.
6. The soft sealing mechanism of a ferrule-type fitting of claim 1, wherein: the section of the annular cutting edge of the inner hole of the cutting sleeve is an isosceles triangle or a right-angled triangle.
7. The soft sealing mechanism of a ferrule-type fitting of claim 1, wherein: the ferrule is hardened at least at the annular cutting edge.
8. The soft sealing mechanism of a ferrule-type fitting of claim 1, wherein: the inner diameter of the sealing ring is smaller than the diameter of the clamping sleeve pipe, and the wire diameter is larger than the radial average thickness of the elastic retainer ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020828863.9U CN212407857U (en) | 2020-05-18 | 2020-05-18 | Soft sealing mechanism of cutting ferrule formula joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020828863.9U CN212407857U (en) | 2020-05-18 | 2020-05-18 | Soft sealing mechanism of cutting ferrule formula joint |
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| CN212407857U true CN212407857U (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020828863.9U Active CN212407857U (en) | 2020-05-18 | 2020-05-18 | Soft sealing mechanism of cutting ferrule formula joint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111473173A (en) * | 2020-05-18 | 2020-07-31 | 上海开恒光岳机械制造有限公司 | Soft sealing mechanism of cutting ferrule formula joint |
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2020
- 2020-05-18 CN CN202020828863.9U patent/CN212407857U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111473173A (en) * | 2020-05-18 | 2020-07-31 | 上海开恒光岳机械制造有限公司 | Soft sealing mechanism of cutting ferrule formula joint |
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