Joint structure for inserting small-diameter pipeline into large-diameter pipeline
By designing the joint structure of hollow threaded inserts and seals on large-diameter pipelines, the sealing and compactness problems in the pipe connections in the pipe are solved, and a stable and economical medium transmission effect is achieved, which is suitable for water purification and other fields.
Patent Information
- Application Number
- CN202420609442.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-03-27
AI Technical Summary
The existing pipe connection structure in the pipe has problems with small pipe sealing, insufficient connection compactness, complex internal structure and high production cost, which affects its use in water purification and other fields.
Design a joint structure for interspersing small-diameter pipes in large diameter pipes, using hollow internal and external threaded inserts and seals to ensure sealing effect through stop steps and sealing cavity, and achieve rapid assembly and low-level assembly through simple and compact structure. Cost production.
It realizes a stable connection between small-diameter pipes and large-diameter pipes, ensures the sealing and safety of medium transmission, simplifies the assembly process and reduces production costs, and is suitable for various medium pipes.
Smart Images
Figure CN222363560U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipeline butt joint, in particular to a joint structure used for inserting a small-diameter pipeline into a large-diameter pipeline. Background Art
[0002] With the continuous innovation of pipeline docking technology, people have designed some pipeline connection structures that use small-diameter pipes inserted in large-diameter pipes, also known as pipe-in-pipe connection structures. This type of pipeline connection structure has strong application value and good application prospects in fields such as water purification. However, the use of pipe-in-pipe structures in fields such as water purification is still in the industry exploration stage. Not only is the sealing problem of small pipes not yet solved, but there is also a problem of connection compactness when small pipes are connected to large pipes. In addition, the internal structure of the pipe-in-pipe connection structure is relatively complex and the production cost is high. The existence of these problems has greatly affected the use of the pipe-in-pipe connection structure in fields such as water purification. Utility Model Content
[0003] In view of the above technical deficiencies, the utility model provides a joint structure which is used in conjunction with the internal thread of the large-diameter pipe connecting port of the large-diameter pipe. When in use, a small-diameter pipe is inserted into the through hole thereof. The structure is compact and the sealing effect is reliable. The joint structure can be conveniently applied to various medium pipes, is easy to assemble and has a low manufacturing cost.
[0004] In order to achieve the above object, the utility model is implemented through the following technical solutions:
[0005] The utility model discloses a joint structure for inserting a small-diameter pipe into a large-diameter pipe, the joint structure is arranged at a large-diameter pipe connection port of a large-diameter pipe with two or more passages to connect the small-diameter pipe, the joint structure comprises a joint body with threads on both the inner and outer surfaces of one end, a threaded insert with an external thread at one end and a sealing member, the joint body and the threaded insert are both hollow and a through hole is arranged in the middle of one end, the joint body cooperates with the internal thread of the large-diameter pipe connection port through its external thread to realize connection with the large-diameter pipe connection port, the threaded insert is connected to the large-diameter pipe connection port through its external thread The external thread cooperates with the internal thread in the joint body to be embedded in the joint body, and the outer wall of the end of the threaded insert away from the side that cooperates with the thread of the joint body is provided with a first stop step, and the inner wall of the joint body located between its through hole and its internal thread is provided with a second stop step, and the first stop step and the second stop step are abutted against each other to limit the position of the threaded insert embedded in the joint body, and a sealing cavity is provided between the end of the joint body close to its through hole and the end of the threaded insert close to its through hole, and the sealing member is fitted in the sealing cavity, and a gasket pressed by the joint body is provided in the large-diameter pipe connection port.
[0006] Furthermore, the end surfaces of the second stop step and the first stop step on the abutting side are both provided with a plurality of trapezoidal convex strips distributed along the circumferential direction of the end surfaces.
[0007] Furthermore, the inner wall cross-section of the threaded insert is stepped, and the transitions between the two axial end faces of the threaded insert and the inner wall of the threaded insert, the transition between the axial end face of the threaded insert close to the seal and the outer wall of the threaded insert, and the transition between the inner wall of the threaded insert close to the seal and the radial plane of the middle of the threaded insert are all transitioned by rounded corners.
[0008] Furthermore, the transition point from the end of the joint body close to the sealing member to the through hole thereof is transitioned through a rounded corner, and the through hole of the joint body is transitioned to the sealing cavity through an oblique angle.
[0009] Furthermore, the end cavity of the threaded insert close to the threaded mating side of the threaded insert and the connector body has a hexagonal cross section.
[0010] Furthermore, the end of the threaded insert close to the threaded mating side of the joint body is circumferentially provided with a plurality of strip grooves extending in the radial direction of the threaded insert.
[0011] Furthermore, a projection of the outer wall of the joint body on the axial plane of the joint body is hexagonal.
[0012] The beneficial effects of the utility model are:
[0013] 1) The inner and outer wall surfaces of the joint body end of the joint structure are both provided with threads, which can match the internal threads of the large-diameter pipe connection port on the general large-diameter pipe used for medium transmission, so as to facilitate the insertion of the small-diameter pipe used for medium transmission into various large-diameter pipes;
[0014] 2) The threaded insert is embedded in the joint body from the inside in a threaded manner, and the first stop step provided on the threaded insert can ensure the size of the sealing cavity, so that the seal can achieve a stable pre-compression effect. Under the condition of bearing the medium pressure, the seal can stably play a sealing role;
[0015] 3) The second stop step of the joint body is kept at a certain distance from the sealing cavity where the seal is located. This structure has a fool-proof function, which facilitates the rapid and accurate assembly of the seal and prevents the seal from being bitten or pinched when the threaded insert is embedded in the joint body;
[0016] 4) Both the through hole of the joint body close to the seal side and the through hole of the threaded insert close to the seal side are standard cylindrical inner holes, which are positioning sections for matching with the small pipes inserted from the outside, ensuring that the inserted small pipes are not affected by the outside world, thereby avoiding the problem of the small pipes becoming flat and other problems that are not conducive to the sealing of the seals;
[0017] 5) This joint structure is designed to achieve pipe-in-pipe connection, allowing the pressure-bearing medium in the large-diameter pipe and the pressure-bearing medium in the small-diameter pipe to be transmitted separately without interfering with each other. The structure adopted is simple, compact, easy to assemble and operate, and has low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 Schematic diagram of the joint structure.
[0019] Figure 2 This is a schematic diagram of the external structure when the joint structure is set in a large-diameter pipeline.
[0020] Figure 3 This is a schematic diagram of the internal structure when the joint structure is set in a large-diameter pipeline.
[0021] Figure 4 for Figure 3 A local enlarged schematic diagram of point A in the middle.
[0022] Figure 5 Schematic diagram of the external structure of the joint body Figure 1 .
[0023] Figure 6 Schematic diagram of the external structure of the joint body Figure 2 .
[0024] Figure 7 Schematic diagram of the internal structure of the joint body.
[0025] Figure 8 Schematic diagram of the external structure of the threaded insert Figure 1 .
[0026] Fig. 9 Schematic diagram of the external structure of the threaded insert Figure 2 .
[0027] Fig.10 Schematic diagram of the internal structure of the threaded insert.
[0028] In the figure, 1. large diameter pipe; 2. large diameter pipe connection port; 3. small diameter pipe; 4. joint body; 5. threaded insert; 6. sealing member; 7. through hole; 8. first stop step; 9. second stop step; 10. sealing cavity; 11. gasket; 12. trapezoidal convex strip; 13. strip groove. DETAILED DESCRIPTION
[0029] The utility model discloses a joint structure for inserting a small-diameter pipe into a large-diameter pipe, such as Figures 1 to 7As shown in the figure, the joint structure is arranged at the large-diameter pipe connection port 2 of a large-diameter pipe 1 with two or more passages to connect with a small-diameter pipe 3. The joint structure includes a joint body 4 with threads on both the inner and outer surfaces of one end, a threaded insert 5 with an external thread at one end, and a sealing member 6. Both the joint body 4 and the threaded insert 5 are hollow and a through hole 7 is provided in the middle of one end. The joint body 4 cooperates with the internal thread of the large-diameter pipe connection port 2 through its external thread to achieve connection with the large-diameter pipe connection port 2. The threaded insert 5 cooperates with the internal thread in the joint body 4 through its external thread to achieve connection with the large-diameter pipe connection port 2. It is now embedded in the joint body 4, and the outer wall of the end of the threaded insert 5 away from the threaded matching side of the joint body 4 is provided with a first stop step 8, and the inner wall of the joint body 4 located between its through hole 7 and its internal thread is provided with a second stop step 9, the first stop step 8 and the second stop step 9 abut against each other to limit the position of the threaded insert 5 embedded in the joint body 4, and a sealing cavity 10 is provided between the end of the joint body 4 close to its through hole 7 and the end of the threaded insert 5 close to its through hole 7, the sealing member 6 is matched in the sealing cavity 10, and a gasket 11 pressed by the joint body 4 is provided in the large-diameter pipe connecting port 2.
[0030] It should be noted that the connector body 4 adopts a right-handed thread to enter the internal thread of the large-diameter pipe connection port 2, and the threaded insert 5 also adopts a right-handed thread to enter the internal thread of the connector body 4. Therefore, when the connector structure is constructed and installed, when the small-diameter pipe 3 is inserted into the through hole 7 of the connector body 4 and the through hole 7 of the threaded insert 5, and the external thread of the connector body 4 is screwed into the internal thread of the large-diameter pipe connection port 2, in the process of tightening the connector structure, because the external thread of the threaded insert 5 and the external thread of the connector body 4 are in the opposite direction, the threaded insert 5 is tightened more and more at this time. This structure is conducive to preventing the threaded insert 5 from loosening during the construction and installation of the connector structure.
[0031] Secondly, when the joint body 4 matches the large-diameter pipe connection port 2 with an internal thread on the external pipe connector, a gasket 11 needs to be added to seal the matching position of the two, thereby increasing the sealing effect of the connection position between the joint structure and the large-diameter pipe 1; the entire joint structure is compact, and the threads on the inside and outside of the joint body 4 can match the internal threads of the large-diameter pipe connection port 2 of the universal large-diameter pipe 1, thereby facilitating the insertion of the small-diameter pipe 3 into various medium pipes; the threaded insert 5 is embedded in the joint body 4 in a threaded manner from the inside, and the position of the threaded insert 5 in the joint body 4 is limited by using a first stop step 8, thereby ensuring that the size of the sealing cavity 10 is maintained within a stable range, allowing the seal 6 to achieve a stable pre-compression effect. The sealing member 6 can stably play a sealing role under the medium pressure, and the first stop step 8 is at a certain distance from the sealing cavity 10. This structure has a foolproof function, which facilitates the rapid and accurate assembly of the sealing member 6. When the threaded insert 5 rotates into the inner cavity of the joint body 4, the sealing member 6 will be automatically pushed to the end of the sealing cavity 10 to avoid pinching or biting the sealing member 6. The through hole 7 of the joint body 4 close to the sealing member 6 and the through hole 7 of the threaded insert 5 close to the sealing member 6 are both toward one end of the sealing member 6, and are standard cylindrical inner holes, which are positioning sections matching the small pipes inserted from the outside, and can ensure that the inserted small pipes (i.e., the small-diameter pipes 3) are not affected by the outside world, thereby avoiding the problem of the small pipes becoming flat and other problems that are not conducive to the sealing of the sealing member 6.
[0032] In addition, the joint structure for realizing pipe-in-pipe connection has a simple structure, easy assembly operation, and low manufacturing cost. It can be used in medium pipes such as tap water and compressed air in conjunction with corresponding threaded ports to effectively seal the pipe-in-pipe, thereby achieving the effect of laying a small pipe in a large pipe.
[0033] As a further preference of the above embodiment, Figure 6 and Figure 8 As shown in the figure, the end surfaces of the second stop step 9 and the first stop step 8 on the abutting sides are both provided with a plurality of trapezoidal convex strips 12 distributed along the circumferential direction of the end surfaces.
[0034] The trapezoidal convex strips 12 provided on the planes of the abutting sides of the threaded insert 5 and the joint body 4 can prevent the threaded insert 5 from loosening when the small-diameter medium transmission pipeline 3 passing through the joint rotates.
[0035] As a further preferred embodiment of the present invention, Figure 3 , Figure 8 and Fig. 9As shown in the figure, the transitions between the two axial end faces of the threaded insert 5 and the inner wall of the threaded insert 5, the transition between the axial end face of the threaded insert 5 close to the seal 6 and the outer wall of the threaded insert 5, and the transition between the inner wall of the threaded insert 5 close to the seal 6 and the radial plane of the middle of the threaded insert 5 are all transitioned by rounded corners.
[0036] The rounded corners can facilitate the insertion of small pipes into the through holes 7 of the threaded inserts 5 and the insertion of the threaded inserts 5 into the inner cavity of the connector body 4, making the assembly of the entire connector and the connection of small pipes easier.
[0037] As a further preferred embodiment of the present invention, Figure 3 , Figure 5 and Figure 6 As shown in the combination, the transition from the end of the joint body 4 near the sealing 6 side to its through hole 7 is transitioned by a rounded corner, and the transition of the inner wall of the joint body 4 between the through hole 7 near its axial end and the sealing cavity 10 is transitioned by an oblique angle.
[0038] Among them, the through hole 7 in the joint body 4 is used to insert the external small pipe. The two ends of the through hole 7 of the joint body 4 facing the outside are chamfered, shaped like a trumpet, which is convenient for the external small pipe to bend naturally outside the joint body 4 to avoid indentations and creases.
[0039] As a further preferred embodiment of the present invention, Fig. 9 As shown, the end cavity of the threaded insert 5 close to the threaded mating side with the joint body 4 is hexagonal in cross section.
[0040] When the threaded insert 5 is installed into the inner cavity of the joint body 4 , the threaded insert 5 can be twisted with the help of a hexagonal wrench to facilitate the assembly, disassembly and separation of the threaded insert 5 .
[0041] As a further preferred embodiment of the present invention, Fig. 9 As shown, the end of the threaded insert 5 close to the threaded mating side of the joint body 4 is circumferentially provided with a plurality of strip grooves 13 extending in the radial direction of the threaded insert 5 .
[0042] When the threaded insert 5 is installed into the inner cavity of the joint body 4 , the threaded insert 5 is twisted with the aid of a tool that can be inserted into the strip groove 13 to achieve assembly, disassembly and separation of the threaded insert 5 .
[0043] As a further preferred embodiment of the present invention, Figure 5 As shown, the projection of the outer wall of the joint body 4 on the axial plane of the joint body 4 is hexagonal.
[0044] The outer wall of the joint body 4 can facilitate the staff to install the joint body 4 into the port portion with internal threads of the external pipe connector using tools.
[0045] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A joint structure for inserting a small-diameter pipe into a large-diameter pipe, the joint structure is arranged at the large-diameter pipe connection port of a double-pass or more large-diameter pipe to connect the small-diameter pipe, characterized in that: The joint structure includes a joint body with threads on both inner and outer surfaces of one end, a threaded insert with external threads at one end, and a sealing member. The joint body and the threaded insert are both hollow and have a through hole in the middle of one end. The joint body cooperates with the internal threads of the large-diameter pipe connection port through its external threads to achieve connection with the large-diameter pipe connection port. The threaded insert cooperates with the internal threads in the joint body through its external threads to achieve embedding in the joint body. The outer wall of the end of the threaded insert away from the side that cooperates with the thread of the joint body is provided with a first stop step. The inner wall of the joint body located between its through hole and its internal threads is provided with a second stop step. The first stop step and the second stop step are abutted against each other to limit the position of the threaded insert embedded in the joint body. A sealing cavity is provided between the end of the joint body close to its through hole and the end of the threaded insert close to its through hole. The sealing member is matched in the sealing cavity. A gasket pressed by the joint body is provided in the large-diameter pipe connection port.
2. The joint structure according to claim 1, characterized in that: The end surfaces of the second stop step and the first stop step on the abutting side are both provided with a plurality of trapezoidal convex strips distributed along the circumferential direction of the end surfaces.
3. The joint structure according to claim 1, characterized in that: The inner wall cross-section of the threaded insert is stepped, and the transitions between the two axial end faces of the threaded insert and the inner wall of the threaded insert, the transition between the axial end face of the threaded insert close to the seal and the outer wall of the threaded insert, and the transition between the inner wall of the threaded insert close to the seal and the radial plane of the middle of the threaded insert are all transitioned through rounded corners.
4. The joint structure according to claim 1, characterized in that: The transition point from the end of the joint body close to the sealing member to the through hole thereof is transitioned through a rounded corner, and the through hole of the joint body is transitioned to the sealing cavity through an oblique angle.
5. The joint structure according to claim 1, characterized in that: The end cavity of the threaded insert close to the threaded mating side of the threaded insert and the connector body is hexagonal in cross section.
6. The joint structure according to claim 1, characterized in that: The end of the threaded insert close to the threaded mating side of the joint body is circumferentially provided with a plurality of strip grooves extending in the radial direction of the threaded insert.
7. The joint structure according to claim 1, characterized in that: The projection of the outer wall of the joint body on the axial plane of the joint body is hexagonal.