Quick pipeline connecting structure
By simplifying the quick-connect structure of pipelines and adopting the design of annular rib protrusions and sealing ring placement grooves, the problems of complex structure, high cost and inability to release insertion stress in existing technologies are solved, thus achieving low-cost and reliable pipeline connections.
Patent Information
- Application Number
- CN202421044231.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-14
AI Technical Summary
Existing quick-connect pipe fittings have complex structures, high costs, and the inability to release insertion stress can easily lead to pipe rupture. The assembly process is also complex and it is difficult to detect missing sealing rings.
The design employs a two-pipeline structure with male and female connectors. The outer periphery of the pipeline features annular rib protrusions and a sealing ring placement groove. Elastic snaps simplify the connection, and a heat-setting process is used to construct the sealing structure, reducing the number of injection molded parts and simplifying the assembly process.
It reduces manufacturing costs, avoids the risk of pipe deformation and rupture, simplifies the assembly process, and makes it easy to detect whether the sealing ring is missing.
Smart Images
Figure CN222316273U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipeline connection, and particularly to a pipeline quick connection structure. Background Art
[0002] Existing pipeline quick-connect joints require a rubber sealing ring to be placed inside the joint in order to prefabricate the installation groove of the sealing ring and the elastic clamp of the joint. Injection-molded quick-connect joints are usually assembled from multiple injection-molded parts, with a complex structure and high cost. In addition, during the process of cold-plugging the plastic extrusion pipe with the quick connector, the hard bamboo structure of the joint easily causes the plastic extrusion pipe to expand, deform, crack or form fine cracks, causing the structure to lose its sealing function.
[0003] In addition, the current quick-connect connectors are assembled with multiple injection molded parts and sealing rings, such as elastic clamps, sealing ring fixing rings, etc. Because of the nested structure, the assembly requirements are high and the assembly process is complicated. The sealing ring or the sealing ring fixing ring is on the inside of the clamp, and missing installation is not easy to be discovered by visual inspection. The connector and the pipeline adopt a cold plug-in process. The outer diameter of the bamboo section at one end of the pipeline is larger than the outer diameter of the plastic pipeline. The pipeline connector is hard inserted into the inner diameter of the pipeline to expand the pipeline. The contraction force of the pipeline constrains the pipeline connector to connect and seal each other. However, the stress of the plug-in and the stress after the plug-in cannot be released, which can easily lead to pipeline rupture.
[0004] In addition, the existing quick-connect joints have a complex structure and need to be assembled from multiple precision injection molded parts, resulting in a high manufacturing cost.
[0005] Furthermore, quick connectors are usually composed of a female connector and a male connector that are locked by interlocking buckles, and sealed by a rubber sealing ring in between. The connector can be released by the locking box of the buckle to achieve plug-in and pull-out functions. The rubber sealing ring is nested in the sealing ring prefabricated groove on the inner diameter of the female connector, and the outer diameter of the male connector is compressed and deformed to form a seal. Due to the injection molding manufacturing process, the sealing ring pre-groove in the female connector cannot be formed at one time, so multiple injection molded parts need to be assembled together. This not only requires multiple injection molds, but also the tolerances of the injection molded parts and the assembly relationship of the injection molded parts need to be controlled, and the assembly process also needs to be controlled, which increases costs in many aspects and complicates the quality control process. Utility Model Content
[0006] The technical problem to be solved by the present invention is to provide a low-cost quick-connect pipe structure that can release the stress during insertion and the stress after insertion, in order to address the problems of high cost of existing quick-connect pipe joints, and the inability to release the stress during insertion and the stress after insertion, which can easily lead to pipe rupture.
[0007] The technical problems that need to be solved in this new experimental model can be achieved through the following technical solutions:
[0008] A pipeline quick connection structure comprises two pipelines, a male connector, a female connector and at least one sealing ring, the two pipelines are divided into a first pipeline and a second pipeline, the first pipeline is inserted into the inner hole of the male connector and sealedly connected, or the first pipeline and the male connector are integrally formed, characterized in that at least two annular rib protrusions are arranged on the outer periphery of the second pipeline, and the sealing ring is arranged between two adjacent annular rib protrusions; the female connector is sleeved on the second pipeline and axially limited by an elastic feeding groove and an annular rib protrusion arranged on the female connector; the female connector is plugged into the male connector and locked in the axial direction, and the inner diameter of the male connector, part of the outer diameter of the second pipeline and the sealing ring jointly achieve sealing.
[0009] In a preferred embodiment of the present invention, an annular sealing surface is provided in the inner hole of the male connector, the inner diameter of the annular sealing surface constitutes a part of the inner diameter of the male connector, and the annular sealing surface and the sealing ring jointly achieve sealing.
[0010] In a preferred embodiment of the present utility model, a sealing ring placement groove is provided between two adjacent annular rib protrusions, and the sealing ring is placed in the sealing placement groove.
[0011] In a preferred embodiment of the present invention, a shrinkage hole is provided at one end of the female connector, and the shrinkage hole is sleeved on the outer diameter of the second pipeline and is in axial limiting contact with an annular rib protrusion.
[0012] In a preferred embodiment of the present invention, the inner end surface of the shrinkage hole is in axial limiting contact with an end surface of an annular rib protrusion on the second pipeline.
[0013] In a preferred embodiment of the utility model, a first limiting end face and / or a second limiting end face is provided in the inner diameter of the male connector, and the first limiting end face is in axial limiting contact with the end face of the second pipeline and / or the second limiting end face is in axial limiting contact with the end face of an annular rib protrusion.
[0014] In a preferred embodiment of the present invention, the second limiting end face is an arc surface, and the end face of the annular rib protrusion of the second limiting end face is also an arc surface, and the two are compatible.
[0015] In a preferred embodiment of the present invention, the end surface of the male connector inserted into one end of the female connector is provided with an annular inclined surface.
[0016] In a preferred embodiment of the present invention, a third limiting end surface is provided in the inner diameter of the female connector, and the third limiting end surface is a sloped surface, which is axially limitedly matched with the annular sloped surface.
[0017] In a preferred embodiment of the utility model, a female buckle is provided on the inner diameter of the female connector, and a male buckle is provided on the outer diameter of the male connector, and the female buckle and the male buckle are engaged with each other, so that the male connector and the female connector are buckled and connected; after the buckle of the female connector is released, the male connector can be pulled out of the female connector.
[0018] In a preferred embodiment of the utility model, the end face of the male buckle away from the first pipeline is an inclined surface, and the end face of the female buckle away from the second pipeline is also an inclined surface, so that the female buckle can smoothly pass over the male buckle and buckle on the male buckle.
[0019] In a preferred embodiment of the utility model, a plurality of partitions are arranged in the circumferential direction of the female buckle so that the female buckle has a certain elasticity, an elastic ring is arranged on the outer diameter of the female connector, and a finger pressing position is arranged on the elastic ring. By pressing the elastic ring, the female buckle can be driven to expand outward to be released and disengaged from the male buckle.
[0020] In a preferred embodiment of the present invention, the first pipeline is formed on or combined with a filter or a pump or a valve.
[0021] Due to the adoption of the above technical solution, the utility model arranges the sealing ring groove on the outer periphery of the pipeline, and places the sealing ring in the sealing ring groove, so that missing installation can be easily found by visual inspection. At the same time, there is no need to arrange a sealing ring groove in the female connector to place the sealing ring, which simplifies the structure of the female connector, reduces the mold making cost of the female connector, and thus reduces the cost.
[0022] The utility model uses a plastic extruded pipe as an inner core, and through a heat setting process, an annular step for inserting the pipe into the inner diameter of the male joint and the female joint, and a sealing ring placement groove are sequentially constructed on the outer contour of the pipe end, and the male joint and the female joint, the female buckle, and the male buckle are sequentially sleeved on the outside of the pipe axially. At this time, when the pipe is plugged into the male joint and the female joint, the outer diameter of the annular step of the pipe, the sealing ring placement groove, the sealing ring, and the inner diameter of the male joint and the female joint together constitute a sealing structure; the male joint and the female joint are clamped by the male buckle and the female buckle to constrain the axial position of the pipe, the male joint and the female joint to avoid axial movement.
[0023] Therefore, in this utility model structure, the number of joint injection molded parts is reduced from multiple to two, the joint structure is simplified and the cost is reduced; no stress deformation is generated during and after the assembly of the pipeline and the joint, and there is no risk of pipeline cracking.
[0024] The utility model pipeline quick connection structure can be widely used in pipelines for gas or liquid transportation in automobiles, energy storage and the like, and can save a lot of manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 The figure is a schematic diagram of the assembly appearance structure of one implementation mode of the pipeline quick connection structure of the utility model.
[0026] Figure 2 This is one of the exploded schematic diagrams of an implementation method of the pipeline quick connection structure of the utility model.
[0027] Figure 3 This is the second exploded schematic diagram of an implementation method of the pipeline quick connection structure of the utility model.
[0028] Figure 4 This is the third exploded schematic diagram of an implementation method of the pipeline quick connection structure of the utility model.
[0029] Figure 5 It is an assembly cross-sectional view of an implementation mode of the pipeline quick connection structure of the utility model. DETAILED DESCRIPTION
[0030] The present invention is further described below in conjunction with the accompanying drawings and specific implementations. The following embodiment is only a description of a specific implementation of the present invention and does not limit the claims of the present invention.
[0031] See also Figures 1 to 5 , a pipeline quick connection structure shown in the figure includes two pipelines 10, 20 (the first pipeline and the second pipeline mentioned above), a male connector 30, a female connector 40 and a sealing ring 50. The pipeline 10 is formed on a filter 60 or a pump or a valve (in this specific embodiment, it is formed on the filter 60).
[0032] Three annular rib protrusions 21, 22, 23 with outer diameters larger than the outer diameter of the pipeline 20 are prefabricated on the outer periphery of one end of the pipeline 20 (of course, it is not limited to three annular rib protrusions 21, 22, 23, and can be two annular steps or more than three annular steps), and a sealing ring placement annular groove 24 with an outer diameter smaller than the outer diameters of the annular steps 22 and 23 is also prefabricated on the outer periphery of one end of the pipeline 20 (of course, it is not limited to one sealing ring placement annular groove, and can be more than one). The outer end surface 23a of the annular step 23 is an arc surface.
[0033] The inner diameter of the male connector 30 has an inner hole 31 and an annular sealing surface 32. The inner diameter of the annular sealing surface 32 is larger than the inner diameter of the inner hole 31, and the annular sealing surface 32 is coaxial with the inner hole 31. A limiting end face 33 (the aforementioned second limiting end face) is provided between the annular sealing surface 32 and the inner hole 31. The limiting end face 33 is an arc surface, which is adapted to the outer end face 23a of the annular step 23 for axial limiting cooperation. An annular inclined surface 47a is provided on the end face of the male connector 30 inserted into the female connector 40, so that the male connector 30 can pass over the female buckle 47 and be inserted into the female connector 40. In addition, a limiting end face 38 (the aforementioned first limiting end face) is also provided on the inner diameter of the male connector 30, and the limiting end face 38 is axially limitedly matched with the end face of the pipeline 20 inserted into the male connector 30.
[0034] The outer diameter of the male connector 30 is composed of two cylindrical surfaces 34 and 35, and the outer diameter of the cylindrical surface 34 is larger than the outer diameter of the cylindrical surface 35. A male buckle 36 is formed on the outer diameter of the cylindrical surface 35. The pipeline 100 is inserted into the inner hole 31 of the male connector 30 and sealed, or the pipeline 10 and the male connector 30 are integrally formed, and the end surface 36a of the male buckle 36 away from the pipeline 10 is an inclined surface.
[0035] The inner diameter of the female connector 40 is coaxially arranged with a shrinkage hole 41, a small diameter inner hole 42, a limiting end face 43 (the aforementioned third limiting end face), a medium diameter inner hole 44 and a large diameter inner hole 45 from one end to the other end. The shrinkage hole 41 has the smallest inner diameter, the small diameter inner hole 42 has the second largest inner diameter, the medium diameter inner hole 44 has the second largest inner diameter, and the large diameter inner hole 45 has the largest inner diameter. The small end inner diameter of the limiting end face 43 is equal to the inner diameter of the small diameter hole 42, and the large end inner diameter of the limiting end face 43 is equal to the inner diameter of the medium diameter hole 44. The inner diameter of the shrinkage hole 41 is slightly larger than the outer diameter of the pipeline 10, and the inner diameter of the small diameter inner hole 42 is slightly larger than the outer diameter of the annular step 21; the inner diameter of the medium diameter inner hole 44 is slightly larger than the outer diameter of the cylindrical surface 34; the inclination of the limiting end face 43 is adapted to the inclination of the end face 36a.
[0036] At least one elastic feed groove 46 is provided on the hole surfaces of the small diameter inner hole 42, the inclined hole 43 and the medium diameter inner hole 44. A female buckle 47 is provided on the large diameter hole 45, and an annular inclined surface 47a is provided on the end surface of the female buckle 47.
[0037] After the female connector 40 and the pipeline 20 are assembled, the elastic feeding groove 46 and the end face of the annular step 21 close to the pipeline 10, as well as the constricted opening 41 of the female connector 40 and the other end face of the annular step 21, together constitute an axial displacement constraint of the female connector 40 on the pipeline 20, so that the female connector 40 will not move freely on the pipeline 20.
[0038] A number of partitions (not shown in the figure) are arranged circumferentially on the hole surface of the large diameter inner hole 45 so that the female buckle 47 has a certain elasticity. An elastic ring 48 is arranged on the outer peripheral part of the female connector 40 corresponding to the large diameter inner hole 45, and a finger pressing position 48a is arranged on the elastic ring 48.
[0039] During assembly, firstly, the female connector 40 is put on the pipeline 20 and the sealing ring 50 is placed in the sealing ring placement groove 24 (the number of sealing rings 50 is configured according to the number of sealing ring placement grooves 24).
[0040] Then, the female connector 40 is pushed until the shrinkage hole 41 is in axial contact with an annular step 21 on the pipeline 20 . At this time, the elastic feed groove 46 is elastically deformed, opened, and then rebounds to limit the end travel of the annular step 21 .
[0041] Then the male connector 30 is inserted into the large diameter inner hole 45 and the medium diameter inner hole 44 of the female connector 40. During the insertion process, under the action of elastic force, the female buckle 47 expands outward, and after the end face 47a of one end thereof passes over the end face 36a of one end of the male buckle 36, the female buckle 47 is buckled on the male buckle 36, so that the male connector 30 is buckled and connected with the female connector 40. At this time, the cylindrical surface 35 of the male connector 30 is inserted into the medium diameter inner hole 44 of the female connector 40, and the annular sealing surface 32 on the male connector 30 is pressed against the sealing ring 50 to achieve sealing contact. The annular step surface 33 is in axial contact with the end face 23a of the annular step 23, and cooperates with the female buckle 47 and the male buckle 36 to limit the axial movement between the pipelines 10, 20, the male connector 30, and the female connector 40.
[0042] When disassembly is required, the finger pressing position 48a on the elastic ring 48 is pressed with two fingers to drive the female buckle 47 on the large diameter inner hole 45 to expand outward and disengage from the male buckle 36, so that the pipeline 10 and the male connector 30 can be pulled out from the female connector 40.
Claims
1. A pipeline quick connection structure, comprising two pipelines, a male connector, a female connector and at least one sealing ring, wherein the two pipelines are divided into a first pipeline and a second pipeline, wherein the first pipeline is inserted into the inner hole of the male connector and sealedly connected or the first pipeline and the male connector are integrally formed, characterized in that: At least two annular rib protrusions are arranged on the outer circumference of the second pipeline, and the sealing ring is arranged between two adjacent annular rib protrusions; the female connector is sleeved on the second pipeline and is axially limited by an elastic feeding groove and an annular rib protrusion arranged on the female connector; the female connector is plugged into the male connector and locked in the axial direction, and the inner diameter of the male connector, part of the outer diameter of the second pipeline and the sealing ring jointly achieve sealing.
2. The pipeline quick connection structure according to claim 1, characterized in that: An annular sealing surface is arranged in the inner hole of the male connector, the inner diameter of the annular sealing surface constitutes a part of the inner diameter of the male connector, and the annular sealing surface and the sealing ring realize sealing together.
3. The pipeline quick connection structure according to claim 1, characterized in that: A sealing ring placement groove is arranged between two adjacent annular rib protrusions, and the sealing ring is placed in the sealing placement groove.
4. The pipeline quick connection structure according to claim 1, characterized in that: A shrinkage hole is provided at one end of the female connector. The shrinkage hole is sleeved on the outer diameter of the second pipeline and is in axial limiting contact with an annular rib protrusion.
5. A pipeline quick connection structure according to claim 4, characterized in that: The inner end surface of the shrinkage hole is in axial limited contact with an end surface of an annular rib protrusion on the second pipeline.
6. The pipeline quick connection structure according to claim 1, characterized in that: A first limiting end face and / or a second limiting end face are arranged in the inner diameter of the male connector, and the first limiting end face is in axial limiting contact with the end face of the second pipeline or / and the second limiting end face is in axial limiting contact with the end face of an annular rib protrusion.
7. A pipeline quick connection structure according to claim 6, characterized in that: The second limiting end face is an arc surface, and the end face of the annular rib protrusion of the second limiting end face is also an arc surface, and the two are matched.
8. The pipeline quick connection structure according to claim 1, characterized in that: The end surface of the male connector inserted into one end of the female connector is provided with an annular inclined surface.
9. The pipeline quick connection structure according to claim 8, characterized in that: A third limiting end surface is arranged in the inner diameter of the female connector, and the third limiting end surface is an inclined surface, which is axially limitedly matched with the annular inclined surface.
10. The pipeline quick connection structure according to any one of claims 1 to 9, characterized in that: A female buckle is arranged on the inner diameter of the female connector, and a male buckle is arranged on the outer diameter of the male connector. The female buckle and the male buckle are engaged with each other, so that the male connector and the female connector are buckled and connected; after the buckle of the female connector is released, the male connector can be pulled out from the female connector.
11. A pipeline quick connection structure according to claim 10, characterized in that: The end surface of the male buckle away from the first pipeline is an inclined surface, and the end surface of the female buckle away from the second pipeline is also an inclined surface, so that the female buckle can smoothly pass over the male buckle and buckle on the male buckle.
12. A pipeline quick connection structure according to claim 10, characterized in that: A plurality of partitions are arranged around the female buckle so that the female buckle has a certain elasticity. An elastic ring is arranged on the outer diameter of the female connector. A finger pressing position is arranged on the elastic ring. By pressing the elastic ring, the female buckle can be driven to expand outward to be released and disengaged from the male buckle.
13. The pipeline quick connection structure according to claim 1, characterized in that: The first pipeline is formed on or combined with a filter, a pump or a valve.