Patent Application
20240360926
This application relates to the technical field of pipeline connection, and in particular to a press-fitting joint for combined pipeline.
Pipeline is a device connected by pipes, valves, etc. for transporting gases, liquids, or fluids with solid particles. Press-fitting joint is one of the press-fitting pipeline system, that is, adjacent pipes are connected by joint constructed as press-fitting connecting structure, which requires the use of press-fitting joint (also known as pipe fitting). A general pipe fitting includes a pipe coupling, which is sequentially equipped with a high-strength gear ring and a scaling ring in a press-fitting section (sealing and fastening section of the pipe) from the outer side to the inner side. During use of the pipe press-fitting connecting structure, firstly, the scaling ring and high-strength gear ring are placed in sequence, the pipe to be connected is then inserted, and then a press-fitting tool is used to make the press-fitting section be press-fitted. The sealing ring and high-strength gear ring are both compressed simultaneously, forcing the sealing ring inside a groove of the press-fitting section to be tightly attached to the pipe, so as to play a role in sealing and waterproof. The high-strength gear ring uses the reverse teeth on top to fasten the pipe, wherein a principle used is that of the reverse tooth, thereby achieving axial tensile resistance of the pipe. The pipeline system formed by such connection can introduce pressure fluid without causing leakage at the press-fitting connecting portion or disengagement from each other in the axial direction.
Applicant wishes to develop a new type of press-fitting joint for combined pipeline, which adopts the principle of embedding rather than the principle of reverse teeth to achieve press-fitting connection, with good reliability.
A technical problem to be solved by this application is to provide a press-fitting joint for combined pipeline, which adopts the principle of embedding instead of the principle of reverse teeth to achieve press-fitting connection and has good reliability.
This application provides a press-fitting joint for combined pipeline, which includes a pipe coupling, a sealing ring, a gear ring and an elastic gasket, an inner face of the gear ring being provided with a plurality of embedded teeth which is arranged towards an axis, a press-fitting section of the pipe coupling being provided with a circumferential groove on an inner surface thereof, the sealing ring, the elastic gasket, and the gear ring being mounted in the circumferential groove on inner surface and arranged sequentially along an axial direction from an outer side to an inner side, an outer end face of the gear ring being axially matched with an outer sidewall of the circumferential groove on inner surface, and an inner sidewall of the circumferential groove on inner surface being axially matched with the sealing ring, an outer circumferential face of the gear ring, an outer circumferential face of the elastic gasket, and an outer circumferential face of the sealing ring being in contact and matched with a bottom face of the circumferential groove on inner surface.
In this technical solution, during press-fitting, the scaling ring, the elastic gasket and the gear ring are compressed simultaneously, and are axially limited between the outer and inner sidewalls of the circumferential groove on inner surface, that is, the sealing ring, the clastic gasket and the gear ring are axially limited in the circumferential groove on inner surface. In this way, with compression, on the one hand, the sealing ring and the elastic gasket are flattened to a certain extent, forming a good fit with the outer wall of the pipe; on the other hand, due to the axial limit for the sealing ring and the elastic gasket and the effect of the embedded teeth, the embedded teeth of the gear ring are generally controlled to be radially embedded into the outer wall of the pipe, thereby achieving the connection effect of tensile resistance through embedding. That is, the pipe is firmly locked in the press-fitting section and cannot move axially or rotate circumferentially, so that connection strength is high. At the same time, due to the separation of the elastic gasket, the gear ring will not damage the scaling ring during press-fitting. In addition, if the elastic gasket remains intact after press-fitting, the attachment of the elastic gasket further plays a role in enhancing the sealing. In summary, this application adopts the principle of embedding instead of the principle of reverse teeth to achieve press-fitting connection, and has good reliability.
Further, the elastic gasket is a rubber ring. In this way, the elastic gasket has good elasticity, not only playing a role in separating and protecting the inner sealing ring, but also participating in scaling.
Further, the outer circumferential face of the gear ring is provided with a position-avoiding face which is narrowed circumferentially at a portion thereof adjacent to the outer end face. In this way, the avoidance surface is beneficial for reducing the perpendicularity requirement for producing the outer sidewall during producing of the circumferential grooves on inner surface, thereby reducing the difficulty of processing.
Further, each of the embedded teeth is set to avoid a portion of the inner face of the gear ring corresponding to the position-avoiding face. In this way, it is beneficial for avoiding weak areas, thereby enhancing reliability.
Further, an inner circumferential face of the sealing ring and/or an inner circumferential face of the elastic gasket form(s) a guiding portion for inserting of the pipe, and an inner diameter of the gear ring is greater than a diameter of the inner circumferential face. In this way, it is beneficial for the insertion of the pipe, avoiding the possibility of scratches on the outer wall of the pipe caused by the embedded teeth during insertion.
Further, there are multiple rows of embedded teeth arranged along an axial direction of the gear ring. In this way, it is beneficial for improving the pull-out strength.
Further, the embedded teeth are set sequentially along a circumferential direction of the gear ring and spaced from each other. In this way, during the press-fitting process, as it is a process of circumferential folding, set sequentially circumferentially and spaced from each other is beneficial to prevent the embedded teeth from pushing against each other.
Further, a top of the embedded tooth is configured as a transverse blade tip. In this way, each embedded tooth is embedded into the outer wall of the pipe with a transverse angle, which is conducive to generating stronger obstruction and strength in the axial direction, thereby greatly improving the tensile resistance performance.
In the figures:
For better understanding the present application, more detailed description of various aspects of this application will be provided with reference to the append drawings. It should be understood that these detailed description are only description of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. In the whole specification, the same reference numbers refer to the same components.
In the attached drawings, for the sake of description, the thickness, size, and shape of the object have been slightly exaggerated. The attached drawings are only an example and not strictly drawn to scale.
It should also be understood that the terms “includes/include/including”, “comprises/comprise/comprising”, “has/have/having”, used in this specification indicate the existence of the described features, structure, step, operation, component, and/or member, but do not exclude the existence or addition of one or more other features, structure, step, operation, component, member, and/or their combination.
As shown in
The press-fitting joint for combined pipeline includes a pipe coupling 1, a gear ring 3, an elastic gasket 4, and a sealing ring 2. As shown in
In this embodiment, the elastic gasket 4 is a rubber ring, such as a rubber flat gasket.
In some embodiments, as shown in
In this embodiment, each of the embedded teeth 5 is set to avoid a portion of the inner face of the gear ring 3 corresponding to the position-avoiding face 11.
Preferably, inner circumferential faces of the sealing ring 2 and elastic gasket 4 form a guiding portion for inserting of the pipe 13, and an inner diameter of the gear ring 3 is greater than a diameter of the inner circumferential face. Of course, it may also be the inner circumferential face of the sealing ring 2 or the inner circumferential face of the elastic gasket 4 that forms the guiding portion for inserting of the pipe 13.
In some embodiments, there are multiple rows of embedded teeth 5 arranged along an axial direction of the gear ring 3. As shown in
As shown in
As shown in
Transverse described above is relative to axial, and the ideal transverse direction is perpendicular to the axial direction. However, the transverse direction described in this disclosure not only includes the ideal transverse direction, but also includes the transverse direction that is inclined relative to the axial direction. Of course, it is better to be closer to the ideal transverse state.
When understanding the present application, if necessary, the above construction may be understood with reference to other embodiments/drawings, and will not be repeated here.
The above descriptions are only embodiments of the present application for illustrative purposes, so any equivalent changes or modifications made based on the structure, features, and principles in the protection scope of this application are included in the protection scope of this application.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202320950045.X | Apr 2023 | CN | national |
| 202321478613.7 | Jun 2023 | CN | national |
This application is a Continuation application of PCT Application No. PCT/CN2023/113553, filed on Aug. 17, 2023, which claims the priorities of Chinese patent application No. 202320950045.X, filed on Apr. 25, 2023, and Chinese patent application No. 202321478613.7, filed on Jun. 10, 2023, the entire contents of which are hereby incorporated by reference.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2023/113553 | Aug 2023 | WO |
| Child | 18744719 | US |
